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R&S FSW-K18 Amplifier Measurements User Manual

1. Parameter value Window type ACP Adjacent Channel Power Table AMAM AM AM AMPM AM PM GCOMpression Gain Compression IMAGnitude Magnitude Capture I ISPectrum Spectrum FFT Configuring the Screen Layout Parameter value Window type MTABle Marker Table PAEI PAE Input Power PAEO PAE Output Power PAETime PAE Time PSWeep Parameter Sweep Diagram PTABle Parameter Sweep Table PVTime Power vs Time I x Q QMAGnitude Magnitude Capture Q QSPectrum Spectrum FFT Q REVM Raw EVM RFMagnitude Magnitude Capture RF RFSPectrum Spectrum FFT RTABle Result Summary Table SEVM Spectrum EVM TDOMain Time Domain VICC Vcc vs lcc LAYout CATalog WINDow This command queries the name and index of all active windows in the active mea surement channel from top left to bottom right The result is a comma separated list of values for each window with the syntax lt WindowName_1 gt lt Windowlndex_1 gt lt WindowName_n gt lt Windowlndex_n gt Return values lt WindowName gt string Name of the window In the default state the name of the window is its index Windowlndex numeric value Index of the window Example LAY CAT Result T p2p EE pl Two windows are displayed named 2 at the top or left and 1 at the bottom or right Usage Query only Configuring the Screen Layout LAYout DIRection Direction This command selec
2. 74 Diagram d r Resulttyp Selection oinnes 76 SIeDSIZB eebe geed Edge 67 Ur me 23 Peak search C M MB 73 Peaks Marker positioning accorto en e c ett e boe hene 73 KE EE Softkey gei Phase difference eta neces en o era ED rede eniin a 15 Polynomlal models niei their n rb en neta echec sn 55 Power added efficiency iss Power Added Efficiency rennen tnn 17 Power characteristics cii thc mes neo rrt eim nn re end 12 Power supply characteristics sesesssss 12 Preamplifier fiue Q 42 kc 42 Presetting Channels eoi pd dated Zeep ki evel de ba ee en a 25 Probes Characteristics c ise deret diar aaa 60 see R amp S FSW User Manual sess 43 Pulse duty cycle R f rence SIGMA uoces ere itta te P Mae 33 R R amp S SMW K541 nice nee Dens 57 Ramp length Refererice sighal 5 ertt hy eee 34 Red Reference signal St D E 32 ele dicc 32 9 uer poro gt 33 DESIGN e E 27 FREGUGINCY oio itte ede eee e E 46 Length 33 49 Level 45 ewen Hee Gu e MET 33 INOLCHIOWICEI Lecta cientes yard eene et ene te detta 33 Pulse duty cycle eret en Eege 33 Ramp length 34 Sample rate 27 Source 27 TMrANSMISSIOM con cie rna aa 28 Remote commands Basics on Syntax niipidi tudi
3. eere erni rein thinner enn nne anada anavu E ipn D aai EES TEE 7 Understanding the Display Information esee nnn 8 Performing Amplifier Measurements eese 10 Configuring Amplifier Measurements cesses 24 El Une NEE 24 Performing Measurements sees eene nnne nnne nnn nnne nnn nnne nennen 26 Designing a Reference Signal eeeeeeeeeeeeneeeeeneneen nnne nnn nnns 27 Configuring Inputs and Outputs sessseseesseseseeee nennen enne nn nnn nennen 34 Selecting and Configuring the Input Source 34 Configuring hr He e En e 38 Defining Level Charactertsttcs sete eeertttsressstrsstrnsetrnetrnnetnnernnnnnnne nnne 40 Using PIODGS iecit Hee uera uoo ludex Reuter pee Mud exe Rees dE a rd 43 Configuring eu e 44 Controlling a Signal Generator eeeeeeeeeeese nenne netten nennt nn nnt na nne 44 Triggering Measurements esee eene nennen nenne nnn nnne 47 Configuring the Data Capture eeseeeeseeeeeeennennnennnnnn nnne nnn nnne nennen 47 Synchronizing Measurement Data esee enne 50 Evaluating Measurement Data eeeeeseeeeeeneeeeeeeen nennen nennen nennen nn 53 Estimating and Compensating Signal Errors eene 54 Applying System Models ese
4. CONFigure REFSignal GOS NWIDth Frequency This command defines the notch width of a reference signal Parameters Frequency numeric value Default unit Hz Example CONF REFS GOS NWID 150000 Defines a notch width of 150 kHz Manual operation See Notch Width on page 33 CONFigure REFSignal GOS RLENgth Samples This command defines the ramp length of a pulsed reference signal Configuring Amplifier Measurements Parameters Samples numeric value integer only Number of samples on each side of the pulse 7 ramp length Default unit Samples Example CONF REFS GOS RLEN 5 Defines a ramp length of 5 samples Manual operation See Ramp Length on page 34 CONFigure REFSignal GOS SLENgth Samples This command defines the length of the reference signal Parameters Samples numeric value integer only Default unit Samples Example CONF REFS GOS SLEN 1024 Defines a reference signal made up out of 1024 samples Manual operation See Signal Length on page 33 CONFigure REFSignal GOS SRATe lt SampleRate gt This command defines the clock or sample rate of the reference signal generated by the signal generator Parameters lt SampleRate gt lt numeric value gt Default unit Hz Example CONF REFS GOS SRAT 20000000 Defines a sample rate of 20 MHz Manual operation See Clock Rate on page 32 CONFigure REFSignal GOS WNAMe lt Fil
5. 5 3 t oreet ettet treten crore ren FETCH PIABIE ICC MINIMUM XA FRESUNE secre cusiccnses cirea rero enar eene ng eee pea e neat egy ee treten FETCRh PTABIe IGCC MINimum Y RESUlt 2 notre nr ertt tret rrr een egeret FETCh PTABIe CC MINimum RESUult 2t orar cond rtr teer tht erre rr rennen 124 FETCh PTABle PAE MAXimum X RESult FETCh PTABle PAE MAXimum Y RESult FETCh PTABIe PAE MAXimumyj RESUlt 3 oreet itr re tnnt eret FETCh PTABIe PAE MINIR m XE BRE Sut caster tetuer ton aseo rene ee ER ee eae E OEE eerte net FETCRh PTABIe PAE MINimum Y RESuUlt eret a trenes FETCh PTABIe PAE MINimumrg RESUIt otro ttn tt tr err n rn repere tena ERR FER e 125 FETCh PTABlIe RMS MAXImum X RESUIt sooner er tnos teen epu tp ee ek e eR te tege reto nen FETCh PTABle RMS MAXimum Y RESult FETCh PTABIe RMS MAXimumpRESUWIEt aiio arn cen rt reno tht erre rna E erre FETCH PTABIE RMS MINIMUMEXE RE SUE circa eo merat ee tex ethnici ea eh eh uie ev cr EE ge sarei FETCRh PTABIe RMS MINim um Y RESUIt 3 ione tn nor tn tete tn ien ter rre t enero FETCIEPTABle VOC MAXimuim RESUIE s a cei tcr cete a Ernte tari niente reta Eee c FETCRh PTABle VCC MINimum X RESUII 2o oio toot Pret ATARE EEEE EES ESEN ESRDE FETCI PTABle VCO MINim rm Y RESUlt zccc ttt tette eterne eter eerie ee cote eise FETCh PTABle VOO MINiImum RESult 2 1 irrito rnae
6. Configuring the AM PM result display The Gain Display settings select the information displayed in the AM PM result dis play You can display phase information either in degrees or radians Select the preferred unit from the corresponding dropdown menu Remote command CALCulate lt n gt UNIT ANGLe on page 183 Configuring the Gain Compression Result Display The Gain Display settings select the information displayed in the Gain Compression result display You can analyze the Gain Compression either at the DUT input or at the DUT output By default the Gain Compression result display shows the gain against the Input Power To analyze the gain against the output power select the Output Power item from the Gain Display X Axis dropdown menu Available when the Gain Compression result display has been selected For more information about the Gain Compression result display see Gain Compres sion on page 16 Remote command CALCulate lt n gt GAIN X on page 183 Selecting the result type displayed in the Parameter Sweep diagram You can select one of several result types evaluated in the Parameter Sweep diagram When you open more than one instance of the Parameter Sweep you can select a dif ferent result for each of the instances For an extensive list of the supported result types see Parameter Sweep Table on page 23 By default the application shows the highest and lowest values that have been mea sured in
7. Notch Width Designing a reference signal within the R amp S FSW K18 Defines the width of a notch that you can add to the reference signal Within the notch all carriers of the reference signal have zero amplitude You can use the noise notch to for example determine the noise power ratio NPR before and after the DPD Remote command CONFigure REFSignal GOS NWIDth on page 131 Notch Position Designing a reference signal within the R amp S FSW K18 Defines an offset for the noise notch relative to the center frequency The offset moves the notch to a position outside the center of the signal You can use the offset to for example generate a one sided noise signal or to examine asymmetric distortion effects Remote command CONFigure REFSignal GOS NPOSition on page 131 Pulse Duty Cycle Designing a reference signal within the R amp S FSW K18 Defines the duty cycle of a pulsed reference signal The duty cycle of a pulse is the ratio of the pulse duration and the actual length of the pulse A duty cycle of 100 96 correposnds to a continuous signal Example The pulse duration is 2 us The actual length of the pulse is 1 us The duty cycle is 1 ys 2 ps 0 5 or 50 Remote command CONFigure REFSignal GOS DCYCle on page 130 Configuring Inputs and Outputs Ramp Length Designing a reference signal within the R amp S FSW K18 Defines the number of samples used to ramp up the pulse to its full power an
8. Transmissioh channel trn trt nets Trigger see R amp S FSW User Manual eee eee 47 Sources list oiii tests 47 Trigger output see R amp S FSW User Manual sees 44 Trigger to frame etre Ferte rre 8 U Units Refererice level tenerte eee 41 Update generator settings eene 45 V herr 60 Nurs SUNING e 37 Ww Waveform ARB arbittary ic ettet pene 27 34 Design i re S Window title bar information sese 9 Windows Adding remote 2 eene Dentes Closing remote Configuring Layout remote E Maximizing remote AN 91 Querying remote A 93 94 Replacing remote sssini iet ee etes 94 Splitting remote i791 Types remote treat etat octets 91 X X value Markel m 71 Y YIG preselector Activating Deactivating see 36 Activating Deactivating remote 136
9. murum PEINE RN NE MC NN NU User Manual 1176 9893 02 03 58 Configuring Envelope Measurements e AM AM First Calculates the AM AM first then calculates the AM PM based on the signal that has already been corrected by its AM AM distortions e AM PM First Calculates the AM PM first then calculates the AM AM based on the signal that has already been corrected by its AM PM distortions Note the DPD sequence is displayed by the diagram that is part of the dialog box Remote command AM AM state CONFigure DPD AMAM STATe on page 159 AM PM state CONFigure DPD AMPM STATe on page 160 Both CONFigure DPD AMXM STATe on page 160 Calculation order CONFigure DPD SEQuence on page 160 DPD Power Linearity Tradeoff The DPD Power Linearity Tradeoff describes the effects of the DPD on the amplifier characteristics When you define a tradeoff of 0 96 the DPD aims for the best linearity green line in the illustration below When you increase the tradeoff value the DPD aims for an opti mization of the output power at the expense of linearity In the ideal case red line the DPD affects the amplifier characteristics in a way that the best output power is ach ieved Original AM AM Curve wap jewod 1ndino Input Power dBm Remote command CONFigure DPD TRADeoff on page 161 3 12 Configuring Envelope Measurements When you perform measurements on power amplifiers supporting envelope tracking you have to d
10. where the lowest EVM has been measured The type and unit of the value queried on the x and y axes depends on the parameter you have selected with CONFigure PSWeep X SETTing and CONFigure PSWeep X 9ETTIng SEN RE RER DEE 118 FETCh PTABle ACP MAXimum X RESUIt eee 118 FETCHP TABIS ACPSMAXImU dE RESU EEN 118 FETCh PTABIe ACP MAXimum RESUII 2 2 222 ic cit te cet prey euch KEEN 118 FETGhIPTABIEACP MINImUmizXDRESUult 3 227 coti ege 118 FETCh PTABIe ACP MINimum Y RESUII sess nennen 118 FETChIPTABIGZACP MINImUmDIRESUult cn roi ages xe te ret ettet petentes 118 FETCh PTABIe ACP ACHannel n LOWer MAXimum X RESUII cesses 119 FETCh PTABlIe ACP ACHannel n LOWer MAXimum Y RESUII cessus 119 FETCh PTABlIe ACP ACHannel n LOWer MAXimum RESUIt esses 119 FETCh PTABIe ACP ACHannel n LOWer MlNimum X RESUIt sesessssusss 119 FETCh PTABIe ACP ACHannel n LOWer MlNimum Y RESUIt esesesssssss 119 FETCh PTABle ACP ACHannel n LOWer MINimum RESUIt eseseeesesssss 119 FETCh PTABIe ACP ACHannel lt n gt UPPer MAXimum X RESult n seoeoeoeeeee erene ne nnen eene 120 FETCh PTABlIe ACP ACHannel n UPPer MAXimum Y RESUIt eeeeesesesssss 120 FETOChPIABle AC ACHannekcnz Uber M ANimum RESu reenen r
11. GONFigure POWer RESult P8DB REFErenee ciieccseiccencecateccestcchaseeengeusstueeeteveneeatarer seasons 166 CONFigure POWer RESult P3DB STATe cessisse nennen inen 166 CONFigure POWerRESul PONESDSTAT iota coin tdi eene cn aen 166 Configuring Amplifier Measurements CONFigure POWer RESult P3DB REFerence lt InputPower gt This command defines the input power corresponding to the gain reference required to calculate the Compression Points The command is available when you turn CONFigure POWer RESult P3DB STATe off Parameters lt InputPower gt lt numeric value gt Default unit dBm Example CONF POW RES P3DB OFF CONF POW RES P3DB REF 3 Reference point is the gain measured at a input power of 3 dBm Manual operation See Configuring compression point calculation on page 62 CONFigure POWer RESult P3DB STATe lt State gt This command turns automatic calculation of the reference point required to determine the Compression Points 1 dB 2 dB and 3 dB on and off Parameters lt State gt ON OFF RST ON Example CONF POW RES P3DB ON Automatically determines the reference point Manual operation See Configuring compression point calculation on page 62 CONFigure POWer RESult PONLy STATe lt State gt This command turns evaluation of all results numerical and graphical except the out put power on and off Parameters lt State gt ON Only the output po
12. 0 cccccccecccedectaeessssstdeaesscctensesvedscteeetecestieeettndecs 138 Controlling a Signal Genet cote eene tee e eer tana 142 Configuring the Data e EE 147 Synchronizing Measurement Data 151 Dening the Evaluation Rag eut eeu te ee rt elu to ge ed re d ne 153 Estimating and Compensating Signal Errors AAA 154 Applyitig BREET 157 Applying Digital Predistorton nnns 159 Configuring Envelope TACK acreano a tee EEGENEN 162 5 6 1 Configuring Amplifier Measurements Configuring ACP Measurements cto ten rhe en eterna n ex ENEE ed 163 e Configuring Power Measurements sss eene 165 e Configuring Parameter weens 167 Designing a Reference Signal GONFigure REFSignal CGW LEDSAGE urcra IE Rodi Eae rosea EE Door aed dn 127 GONFigure REFSIgBal ee e DE 128 CONFloure REF Gional CWE Dlbower eene nn nne 128 CONFigure REFSignal CWF ETGenerator STA G rriiiiiininnriiicnraiiiiniaisii iaaiiai 128 CONFIigure REFSignalGWE F PATE ci Iun ccr terere avere a a aa diia 129 CONFigure REFSignal CWF LEDState essere eere 129 CGONFigure REFSIgnal e TR 129 CONFigure REFSignal GOS BWIDIlh 1 2 o outer eco ei ceto eee ede veneni 130 GONFIgure REFSIgBal GOS CRESI utut E entr rene eaten adi qaad 130 CONFigure REFSignal GOS DCY Cle 2 ccccceeseneeeeeeeceeeceeneeananenaaeaeaeaeaeneenaeenereretenenes 130 CONFIgure REFSIghal GOS EBDSlale aaa noce urn tree etel t eres 130 GONFigure REFSignal GOS NPONSItIOn scien 22
13. 75 RST 500 Example INP IMP 75 Usage SCPI confirmed Manual operation See Impedance on page 36 INPut IQ BALanced STATe State This command defines whether the input is provided as a differential signal via all 4 Analog Baseband connectors or as a plain UO signal via 2 single ended lines 5 6 3 Configuring Amplifier Measurements Parameters State ON Differential OFF Single ended RST ON Example INP IQ BAL OFF Manual operation See Input Configuration on page 38 INPut SELect BBANalog STATe State This command turns simultaneous use of RF input and analog baseband input on and off Parameters State ON OFF Example INP SEL BBAN ON Turns the analog baseband on Manual operation See Enable Parallel BB Capture on page 38 Configuring the Frequency El Ke ee NEE 137 SENSe FREQuency CENT STEP ncini ainai ia esee russe eo aa eec oda ud 138 SENSe PREOQUBHCY OPES EE 138 SENSe FREQuency CENTer Frequency This command defines the center frequency Parameters Frequency The allowed range and fmax is specified in the data sheet UP Increases the center frequency by the step defined using the SENSe FREQuency CENTer STEP command DOWN Decreases the center frequency by the step defined using the SENSe FREQuency CENTer STEP command RST fmax 2 Default unit Hz Example FREQ CENT 100 MHz FREQ CENT STEP 10 MHz FRE
14. Attenuation Mode Value The RF attenuation can be set automatically as a function of the selected reference level Auto mode This ensures that the optimum RF attenuation is always used It is the default setting By default and when electronic attenuation is not available mechanical attenuation is applied In Manual mode you can set the RF attenuation in 1 dB steps down to 0 dB Other entries are rounded to the next integer value The range is specified in the data sheet If the defined reference level cannot be set for the defined RF attenuation the refer ence level is adjusted accordingly and the warning Limit reached is displayed 3 4 4 Configuring Inputs and Outputs NOTICE Risk of hardware damage due to high power levels When decreasing the attenuation manually ensure that the power level does not exceed the maximum level allowed at the RF input as an overload may lead to hardware damage Remote command INPut ATTenuation on page 139 INPut ATTenuation AUTO on page 139 Using Electronic Attenuation If the optional Electronic Attenuation hardware is installed on the R amp S FSW you can also activate an electronic attenuator In Auto mode the settings are defined automatically in Manual mode you can define the mechanical and electronic attenuation separately Note Electronic attenuation is not available for stop frequencies or center frequencies in zero span 213 6 GHz In Auto mode RF attenuation
15. Example FETC MACC IQIM CURR would return e g 0 02 Usage Query only Manual operation See Results to check modulation accuracy on page 11 FETCh MACCuracy IQOFfset MAXimum RESult FETCh MACCuracy IQOFfset MINimum RESult FETCh MACCuracy IQOFfset CURRent RESult This command queries the UO Offset as shown in the Result Summary Return values lt lQOffset gt lt numeric value gt Minimum maximum or current UO Offset depending on the command syntax Default unit dB Performing Amplifier Measurements Example FETC MACC IQOF MIN would return e g 0 001 Usage Query only Manual operation See Results to check modulation accuracy on page 11 FETCh MACCuracy MERRor MAXimum RESult FETCh MACCuracy MERRor MINimum RESult FETCh MACCuracy MERRor CURRent RESult This command queries the Magnitude Error as shown in the Result Summary Return values lt Magnitude gt lt numeric value gt Minimum maximum or current Magnitude Error depending on the command syntax Default unit Example FETC MACC MERR MAX would return e g 1 12 Usage Query only Manual operation See Results to check modulation accuracy on page 11 FETCh MACCuracy PERRor MAXimum RESult FETCh MACCuracy PERRor MINimum RESult FETCh MACCuracy PERRor CURRent RESult This command queries the Phase Error as shown in the Result Summary Return values lt PhaseError gt lt numeric value gt Minimum
16. If the measurement mode is changed for a measurement channel while the Sequencer is active see INITiate lt n gt SEQuencer IMMediate on page 100 the mode is only considered the next time the measurement in that channel is activated by the Sequencer Suffix n irrelevant Parameters State ON OFF 0 1 ON 1 Continuous measurement OFF 0 Single measurement RST 1 Example INIT CONT OFF Switches the measurement mode to single measurement INIT CONT ON Switches the measurement mode to continuous measurement Manual operation See Continuous Sweep RUN CONT on page 26 INITiate lt n gt IMMediate This command starts a single new measurement You can synchronize to the end of the measurement with OPC OPC or WAI Suffix lt n gt irrelevant Usage Event Manual operation See Single Sweep RUN SINGLE on page 26 Performing Amplifier Measurements INITiate lt n gt SEQuencer ABORt This command stops the currently active sequence of measurements The Sequencer itself is not deactivated so you can start a new sequence immediately using INITiate lt n gt SEQuencer IMMediate on page 100 To deactivate the Sequencer use SYSTem SEQuencer on page 101 Suffix lt n gt irrelevant Usage Event INITiate lt n gt SEQuencer IMMediate This command starts a new sequence of measurements by the Sequencer Its effect is similar to the INITiate lt n gt IMMediate command used for a single measurem
17. dQ ccieccctibeescceeceessdececeaptecctectbessecesPensecedscveuancehenbeeiet 16 PAE vs Input Powers PAE vS Output POWOE ttt ett eter eta tenn den ont 17 iru 17 Power ys TIIRYG ncnia ERES XAR SR EERSTEN 18 RW EVM 18 Eelere EN 19 SP SC UHI EE 20 Time Weu CT DE 20 rep dlc 22 Parameter SWOGOp ciunas a EA ES aY 22 L Parameter Sweep Disagram entente tnnt 22 L Parameter Sweep Table 23 Numeric Result Summary The Result Summary shows various measurement results in numerical form combined in one table The table is split in two parts three parts when you use the baseband input e The first part shows the modulation accuracy e The second part shows the power characteristics of the RF signal e The third part shows the power supply characteristics of the amplifier 7 Result Summary Current uadrature ain Imb For each result type several values are displayed e Current Value measured during the last sweep In case of measurements that evaluate each captured sample this value repre sents the average value over all samples captured in the last sweep e Min User Manual 1176 9893 02 03 10 In case of measurements that evaluate each captured sample this value repre sents the sample with lowest value captured in the last sweep e Max In case of measurements that evaluate each captured sample this value repre s
18. lu e el Che TE 99 INITlate nzfiMMedatel nennen emen nnn nnn tn eres nre rt irae rrr nnns 99 INI Tiatesn SEQuesrncerABODL itid ade Er aae eer teet renean eene n aie C dete cur ence die 100 INITlate nz GEOuencerJMMedate senes nnns nnns sans saa 100 INlTlate nz SGEOuencerMODE enne nensis n anaa a an arka an as si sana iis 100 E SHEET 101 INITiate lt n gt CONMeas This command restarts a single measurement that has been stopped using ABORt or finished in single measurement mode The measurement is restarted at the beginning not where the previous measurement was stopped As opposed to INI Tiate lt n gt IMMediate this command does not reset traces in maxhold minhold or average mode Therefore it can be used to continue measure ments using maxhold or averaging functions Suffix lt n gt irrelevant Performing Amplifier Measurements Usage Event Manual operation See Continue Single Sweep on page 27 INITiate lt n gt CONTinuous State This command controls the measurement mode for an individual measurement chan nel Note that in single measurement mode you can synchronize to the end of the mea surement with OPC OPC or WAI In continuous measurement mode synchroniza tion to the end of the measurement is not possible Thus it is not recommended that you use continuous measurement mode in remote control as results like trace data or markers are only valid after a single measurement end synchronization
19. Abortirig remiole ecrit contes 100 Activating remote 100 Mode remote ses 100 EE EE 99 see R amp S FSW User Manual eese 10 ree e mm TES 47 Signal characteristics see fesultdisplays ith vet etes es 10 Signal errors 54 Signal En EE 27 Signal length Reference Signal sassen eni e e tera 33 Signal synchronization creen ee tore enn tia 50 Single sweep iei T 26 Softkeys Continue Single Sweep eene 27 Continuous SWEEP sisississininisinssiaesiinai nundana nna 26 Marke intai rassa anan a drea E 72 Miia ao a alls EEE eet EENE 73 Nude M 73 Next Peak nica see tee ottenere tenet 73 Norm D elta eio ee tiet tenor ses 71 Peak uso ote eic tie Da rot endi pi abus tes 73 Preamp EE 42 Ref Level M 41 Ref Level Offset x o rb e tee 41 RF Atten Auto 42 RF Atten Mariual ote tet 42 Single SWCD eebe ege 26 Specifics for Configuration Status Daf ise eere ep sti nen ee HORE Suffixes Remote commands ceni iterare naasa EN 83 Sweep AD OMING E 26 27 SWEEP COUNT E 8 Synchronization Failure 2 51 Method nm 51 Parameter Sweep 4 07 Elle 52 EL EE 50 State x System MODES iai moinen edente ie C a 55 T Time Domain Configuration of result display ssss 74 Timing el E 20 Trace export see R amp S FSW User Manual Trace selection
20. EL L5 Meas Settings Result 0 0s 3 Spectrum FFT 1 Meas O E AM AM 16 0 MHz 15 984375 MHz t 77 0 dBm 5 Time Domain 1 Meas 2 Mode 3 RefSTSVAM PM 1 Clrw 2 Mod e IdealLine 483 281 us 66 0 dBm Fig 1 1 Screen layout of the amplifier measurement application 1 Channel bar 2 Diagram header 3 Result display 4 Status bar 5 Softkey bar For a description of the elements not described below please refer to the Getting Star ted of the R amp S FSW Channel bar information The channel bar contains information about the current measurement setup progress and results MultiView SS Spectrum Amplifier Ref Level 30 00 dBm Meas Time 3 125 ms TIF 1 570095774 ms SGL Att OdB Freq 60 0 MHz Meas BW 25 6MHz SRate 32 MHz Count 0 620 60 0 MHz 30 0 dBm YIG Bypass Fig 1 2 Channel bar of the amplifier application Ref Level Current reference level of the analyzer Att Current attenuation of the analyzer Freq Frequency the signal is transmitted on mum PEL ee MC NN NN User Manual 1176 9893 02 03 8 Understanding the Display Information Meas Time Length of the signal capture Meas BW Bandwidth with which the signal is recorded TTF Time difference between the trigger event and the first sample of the reference signal 7 beggining of a frame SRate Sample rate with which the signal is recorded SGL Indicates that single sweep mode is active Count The current signal count for measurem
21. Example FETC PTAB GAIN MAX would return e g 5 392 DBM Usage Query only FETCh PTABle ICC MAXimum X RESult FETCh PTABle ICC MAXimum Y RESult FETCh PTABle ICC MAXimum RESult FETCh PTABle ICC MINimum X RESult FETCh PTABle ICC MINimum Y RESult FETCh PTABle ICC MINimum RESult These commands query the result values for the cc result as shown in the Parameter Sweep Table Return values Results numeric value For RESult Minimum or maximum result that has been measured For X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTing Example FETC PTAB VCC MIN Y would return e g if the y axis represents the output power 10 DBM Usage Query only FETCh PTABle PAE MAXimum X RESult FETCh PTABle PAE MAXimum Y RESult Performing Amplifier Measurements FETCh PTABle PAE MAXimum RESult FETCh PTABle PAE MINimum X RESult FETCh PTABle PAE MINimum Y RESult FETCh PTABle PAE MINimum RESult These commands query the result values for the PAE result as shown in the Parame ter Sweep Table Return values lt Results gt lt num
22. Minimum maximum or current current depending on the com mand syntax Default unit A Example FETC ICC MAX would return e g 2 403 Usage Query only Manual operation See Results to check the power supply characteristics of the amplifier on page 12 FETCh IVOLtage PURE MAXimum RESult FETCh IVOLtage PURE MINimum RESult FETCh IVOLtage PURE CURRent RESult This command queries the voltage measured at the baseband input as shown in the Result Summary Performing Amplifier Measurements The returned value is a pure voltage that does not contain any correction factors Return values Voltage numeric value Minimum maximum or current voltage depending on the com mand syntax Default unit V Example FETC IVOL PURE CURR would return e g 1 4 Usage Query only Manual operation See Results to check the power supply characteristics of the amplifier on page 12 FETCh QVOLtage PURE MAXimum RESult FETCh QVOLtage PURE MINimum RESult FETCh QVOLtage PURE CURRent RESult This command queries the measured at the baseband input Q as shown in the Result Summary The returned value is a pure voltage that does not contain any correction factors Return values lt Voltage gt lt numeric value gt Minimum maximum or current voltage depending on the com mand syntax Default unit V Example FETC IVOL PURE CURR would return e g 1 42 Usage Query only Manu
23. POWer P1DB CURRent RESult on page 112 FETCh POWer P2DB CURRent RESult on page 112 FETCh POWer P3DB CURRent RESult on page 112 Results to check the power supply characteristics of the amplifier Numeric Result Summary These results are available when you turn on the baseband input For valid results make sure that you have configured the measurement correctly regarding the equipment you are using see Configuring PAE measurements Power Added Efficiency on page 60 Baseband Input Voltage I Voltage measured at the channel of the analyzer baseband input FETCh IVOLtage PURE CURRent RESult on page 114 Baseband Input Voltage Q Voltage measured at the Q channel of the analyzer baseband input FETCh QVOLtage PURE CURRent RESult on page 115 Voltage Voltage measured at the Q channel of the analyzer baseband input This value represents the supply voltage of the power amplifier The result is the same as the Baseband Input Voltage Q when the mulitplier 1 and the offset 0 see Configuring PAE measurements Power Added Efficiency on page 60 FETCh VCC CURRent RESult on page 115 Current Current measured at the channel of the baseband input This corresponds to the current drawn by the amplifier FETCh ICC CURRent RESult on page 114 Power DC power measured at the baseband input The DC power is the product of the measured voltage and current FETCh BBPower CURRent RESult on p
24. R amp S FSW K82 BC2K CDMA2000 BTS cdma2000 MS R amp S FSW K83 MC2K CDMA2000 MS 1xEV DO BTS R amp S FSW K84 BDO 1xEV DO BTS 1xEV DO MS R amp S FSW K85 MDO 1xEV DO MS WLAN R amp S FSW K91 WLAN WLAN LTE R amp S FSW K10x LTE LTE Real Time Spectrum R amp S FSW B160R RTIM Real Time Spectrum K160RE DOCSIS 3 1 R amp S FSW K192 DOCSis DOCSIS 3 1 Note the default channel name is also listed in the table If the specified name for a new channel already exists the default name extended by a sequential number is used for the new channel INSTrument REName lt ChannelName1 gt lt ChannelName2 gt This command renames a measurement channel Parameters lt ChannelName1 gt String containing the name of the channel you want to rename lt ChannelName2 gt String containing the new channel name Note that you can not assign an existing channel name to a new channel this will cause an error Example INST REN IOQAnalyzer2 IQAnalyzer3 Renames the channel with the name IQAnalyzer2 to IQAna lyzer3 User Manual 1176 9893 02 03 89 Configuring the Screen Layout Usage Setting only INSTrument SELect lt ChannelType gt lt ChannelName gt This command activates a new measurement channel with the defined channel type or selects an existing measurement channel with the specified name Also see INSTrument CREate NEW on page 87 Parameters lt ChannelType gt Channel type of
25. RST ON Example CONF SIGN ERR EST FOFF ON Turns on error estimation CONFigure SIGNal ERRor ESTimation IQIMbalance STATe State This command turns estimation of the UO Imbalance on and off Parameters State ON OFF RST ON Example CONF SIGN ERR EST IQIM ON Turns on error estimation Configuring Amplifier Measurements CONFigure SIGNal ERRor ESTimation IQOFfset STATe State This command turns estimation of the UO Offset on and off Parameters State ON OFF RST ON Example CONF SIGN ERR EST IQOF ON Turns on error estimation CONFigure SIGNal ERRor ESTimation SRATe STATe State This command turns estimation of the Sample Error Rate on and off Parameters State ON OFF RST ON Example CONF SIGN ERR EST SRAT ON Turns on error estimation 5 6 10 Applying a System Model CONFloure MODeling AMAM Ober 157 CONFigune MODEN AMPM ORDE a idera EE then g aa 158 GONFigure MOBeling ERANQO 2 2 anaana A ea eye vk ENEE EEN 158 GONFISgure MOBDeliBgdNPOIDIS Ire Ron rin Rede ir E ec E Pech d aee 158 CONFioure MODelng SGEOuence nennen nennen nnne nha rere 158 CONFigure MODeElING STAT EE 159 CONFigure MODeling AMAM ORDer lt Order gt This command defines the order or degree of the AM AM model polynomials that should be calculated Parameters lt Order gt String containing the polynomials to be calculated You can eith
26. extended by a consecutive number e g IQAnalyzer IQAnalyzer2 The channel to be duplicated must be selected first using the INST SEL command Example INST SEL IQAnalyzer INST CRE DUPL Duplicates the channel named IQAnalyzer and creates a new measurement channel named IQAnalyzer2 Usage Event INSTrument CREate REPLace lt ChannelName1 gt lt ChannelType gt lt ChannelName2 gt This command replaces a measurement channel with another one Setting parameters lt ChannelName1 gt String containing the name of the measurement channel you want to replace lt ChannelType gt Channel type of the new channel For a list of available channel types see INSTrument LIST on page 88 lt ChannelName2 gt String containing the name of the new channel Note If the specified name for a new channel already exists the default name extended by a sequential number is used for the new channel see INSTrument LIST on page 88 Example INST CRE REPL IQAnalyzer2 IQ IQAnalyzer Replaces the channel named IQAnalyzer2 by a new measure ment channel of type IQ Analyzer named IQAnalyzer Usage Setting only INSTrument CREate NEW lt ChannelType gt lt ChannelName gt This command adds an additional measurement channel The number of measurement channels you can configure at the same time depends on available memory Parameters lt ChannelType gt Channel type of the new channel
27. functionality available in the Spectrum application gt To access markers proceed as follows e Inthe Configuration Overview select the Result Configuration button and then the Markers or Marker Settings tab e Press the MKR key and select the Marker Config softkey Using Markers Availability of markers The Markers and Marker Settings tabs are available for result displays that support markers If the tabs are unavailable make sure to select a result display that actually supports markers from the Specifics for dropdown menu for example the Spectrum FFT result display Gilels 3 Spectrum FFT gt Note also that the R amp S FSW K18 does not support more than four markers in any result display Selected WE EE 71 ISAT ESI TN 71 Marker mei P Em 71 Marker bo 71 Reference MAKER TE T 72 Assigning the Marker to a Trace 72 UNITIES M 72 Marker RER EU 72 Selected Marker Marker name The marker which is currently selected for editing is highlighted orange Remote command Marker selected via suffix m in remote commands Marker State Activates or deactivates the marker in the diagram Remote command CALCulate lt n gt MARKer lt m gt STATe on page 176 CALCulate lt n gt DELTamarker lt m gt STATe on page 175 Marker Position X value Defines the position x value of the marker in the d
28. ott oe osea te eae EENS CALCulate lt n gt DEL Tamarker m MAXimum LEFT eui enint eerie acri ci mactare rine INEAN CAL Culate nz D I Tamarker cmz MAimum NENT CALCulate lt n gt DELTamarker lt m gt MAXimum RIGHt CALCulate lt n gt DELTamarker lt m gt MAXimum PEAK CAL Culate nz D I Tamarker cmz MiNimum LEET CAL Culate nz D I Tamarker mz MiNimumNENXT A CALCulate lt n gt DELTamarker lt m gt MINIMUM RIGHTL A CALOCulate n DELTamarker m MlNimum PEAK eani riii aiaa CALCulatesn DEETamarkersmo MRBEF iet tees aE aseo a a Aa CALCulate lt n gt DELTamarker lt m gt TRACe GALCulate lt n gt DEL nnerkr ie a ie all agen cl Meee aed tee edd 175 CALCulat lt n gt DEL Tamarkersime y iieri tetto ornate tiis ce et eed ei E aE aE 175 GALGCulate n DELTamarkersm ES TATe cca tn rtr nt ttti rete does 175 or Kei oper p qe 183 CALCulatesnz MARKers m AOFF 1i tette ee Eie D Bex euet dandi Ma eda Rea Rec cR Cape qee 176 CAL Culate nz MAbkercmz FUNCtion POWer RESU AA 163 CALCulate lt n gt MARKer lt m gt MAXimum LEFT CAL Culate nz MAbkercmz MAXIMUM NENT 179 CAL Culate nz MAbkercmz MANimumbRlGHt AA 180 CALCulate n MARKer m MAXimumy PEAK 22 orn trn tnn trennen th nonae dona 180 CALCulate lt n gt MARKer lt m gt MINIMUMILER 2 toto roit reser otio ocupa din oc cea 180 CALCulatesn MARKer m MINim m NEXT aine tor rase eu uo Erro
29. whose unit depends on the parameter type you have selected with CONFigure PSWeep Y SETTing Hz in case of the center frequency dBm in case of the output level s in case of the delay between envelope and RF signal e V in case of the envelope bias Default unit UNITS PS Example See CONFigure PSWeep Y SETTing Configuring Amplifier Measurements CONFigure PSWeep X STEP lt StepSize gt This command defines the stepsize for the first parameter controlled by the Parameter Sweep Parameters lt StepSize gt lt numeric value gt whose unit depends on the parameter type you have selected with CONFigure PSWeep Y SETTing Hz in case of the center frequency dBm in case of the output level s in case of the delay between envelope and RF signal V in case of the envelope bias Default unit UNITS PS STEP Example See CONFigure PSWeep Y SETTing CONFigure PSWeep X STOP Stop This command defines the stop value for the first parameter controlled by the Parame ter Sweep Parameters Stop numeric value whose unit depends on the parameter type you have selected with CONFigure PSWeep Y SETTing Hz in case of the center frequency dBm in case of the output level s in case of the delay between envelope and RF signal e V in case of the envelope bias Default unit UNITS PS Example See CONFigure PSWeep Y SETTing CONFigure PSWeep Y SETTing Setting This command selects the parameter type for the secon
30. 13 25 GHz Center Frequ size Stepsize VER 1 0 MHz Frequ t The frequency characteristics are similar to those available in the Spectrum applica tion For a comprehensive description of these settings please refer to the R amp S FSW User Manual Caller E e 39 Center Frequency Stepsize sss essen nennen nennen nnns senes 39 cere en ET 39 Center Frequency Defines the frequency of the measured signal The possible value range depends on the R amp S FSW model you have See the data sheet for more information about the supported frequency range Remote command SENSe FREQuency CENTer on page 137 Center Frequency Stepsize Defines the step size by which the center frequency is increased or decreased when the arrow keys are pressed When you use the rotary knob the center frequency changes in steps of only 1 10 of the Center Frequency Stepsize Center Sets the step size to the value of the center frequency and removes the coupling of the step size to span or resolution bandwidth The used value is indicated in the Value field Manual Defines a fixed step size for the center frequency Enter the step size in the Value field Remote command SENSe FREQuency CENTer STEP on page 138 Frequency Offset Shifts the displayed frequency range along the x axis by the defined offset 3 4 3 Configuring Inputs and Outputs This parameter has no effect on the instrument s har
31. 22 22 22 too Ine ti eren kite edad saec DRE vilebes 131 CONFigure REFSignal GOS NWIDth isses nennen ntes 131 CONFigure REFSignali G OSEE E 131 GCONFig re REFSignal GOS SLENglth 2 2 2 1 2 rv esr uda cec Dex Tad pec OIM Po rn ae 132 EE Lee DE ele Ee KE 132 CONFloure REF Gional GOSS WNAMe rere ennt ne nennen ntes s sensns inni 132 CONFigure RSEFSIgnal GOS WIRIT EE 133 EE Lee De EE EE 133 CONFloure REF Gional SINFo SL ENG 133 CONFigure REFSIgnal SINFO SRATR3 accord rrt ot rere e ederet pe cancun 133 This command queries the transmission state of the reference signal designed on a signal generator Available when you configure the reference signal on a signal generator Return values State GREen Transmission was successful GREY Unknown transmission state RED Transmission was not successful Example CONF REFS CGW READ CONF REFS CGW LEDS would return e g GRE Usage Query only Configuring Amplifier Measurements Manual operation See Designing a reference signal on a signal generator on page 29 CONFigure REFSignal CGW READ This command transfers a reference signal designed on a signal generator into the R amp S FSW K18 Example CONF REFS CGW READ Imports the reference signal data from the generator Usage Event Manual operation See Designing a reference signal on a signal generator on page 29 CONFigure REFSignal CWF DPlIPower Power This
32. 4 Optional Keywords Some keywords are optional and are only part of the syntax because of SCPI compli ance You can include them in the header or not Note that if an optional keyword has a numeric suffix and you need to use the suffix you have to include the optional keyword Otherwise the suffix of the missing keyword is assumed to be the value 1 Optional keywords are emphasized with square brackets 5 2 5 5 2 6 5 2 6 1 Introduction Example Without a numeric suffix in the optional keyword SENSe FREQuency CENTer is the same as FREQuency CENTer With a numeric suffix in the optional keyword DISPlay WINDow lt 1 4 gt ZOOM STATe DISPlay ZOOM STATe ON enables the zoom in window 1 no suffix DISPlay WINDow4 ZOOM STATe ON enables the zoom in window 4 Alternative Keywords A vertical stroke indicates alternatives for a specific keyword You can use both key words to the same effect Example SENSe BANDwidth BWIDth RESolution In the short form without optional keywords BAND 1MHZ would have the same effect as BWID 1MHZ SCPI Parameters Many commands feature one or more parameters If a command supports more than one parameter these are separated by a comma Example LAYout ADD WINDow Spectrum LEFT MTABle Parameters may have different forms of values CNN nn e EE 84 Te BEE 85 NEU Ee D acarani aaa raie a aeaa iaaa iana 86 Character SUNOS e
33. 53 FROG WE 16 52 Bipm 55 Configuration 25 OF Order of calculation unco error ren 58 iile 58 Duplicating Measurement channel remote ss 87 DUT behaviour T lee c 55 E Electronic input attenuation sssessssssss 42 43 Envelope EE 67 Envelope to RF delay PEN Td Envelope tracking 25 90 EtrorcompernsaliOl sssaaa Eesen 54 Error vector WE rro e m 18 SPECII e e 19 Errors o ns 41 Estimating e 54 Evaluation methods une Evaluation range F Filters High pass remote ertet 135 High pass RF input ciet ete 36 YIG remole EE 136 Frequency s UCL ET 38 sur P 39 Parameter Sweep 67 Reference signal 2 rrr pterea 46 EIL Stepsize H Synchtonlzation se erecto rrt ee Ed 46 Frequeticy SpectEum TE 20 Full scale level 2 rtt tte tetra 41 G Gain act cd M 16 Gain Compression Configuration of result display 74 Generation Isefeience Signal 2 nre nte tires 27 Generator r A4 Control Parameter Sweep DPD eege e DPD pdale n retenti rent Frequency sits IP address Level tenentes Multi waveform files Path tomus Settings Update Of pisri mtt Gene
34. 9893 02 03 82 5 2 2 5 2 3 5 2 4 Introduction Default parameter values that are used directly after resetting the instrument RST command are indicated as RST values if available Default unit This is the unit used for numeric values if no other unit is provided with the parame ter e Manual operation If the result of a remote command can also be achieved in manual operation a link to the description is inserted Long and Short Form The keywords have a long and a short form You can use either the long or the short form but no other abbreviations of the keywords The short form is emphasized in upper case letters Note however that this emphasis only serves the purpose to distinguish the short from the long form in the manual For the instrument the case does not matter Example SENSe FREQuency CENTer is the same as SENS FREQ CENT Numeric Suffixes Some keywords have a numeric suffix if the command can be applied to multiple instances of an object In that case the suffix selects a particular instance e g a mea surement window Numeric suffixes are indicated by angular brackets n next to the keyword If you don t quote a suffix for keywords that support one a 1 is assumed Example DISPlay WINDow lt 1 4 gt ZOOM STATe enables the zoom in a particular mea surement window selected by the suffix at WINDow DISPlay WINDow4 ZOOM STATe ON refers to window
35. Demod IQ IQ Analyzer IQ IQ Analyzer2 Usage Query only Table 5 1 Available measurement channel types and default channel names in Signal and Spectrum Analyzer mode Application lt ChannelType gt Default Channel Name Parameter Spectrum SANALYZER Spectrum UO Analyzer IQ IQ Analyzer Note the default channel name is also listed in the table If the specified name for a new channel already exists the default name extended by a sequential number is used for the new channel R amp S9FSW K18 Remote Control Commands for Amplifier Measurements pm MH MQ H H e Application lt ChannelType gt Default Channel Name Parameter Pulse R amp S FSW K6 PULSE Pulse Analog Demodulation R amp S FSW K7 ADEM Analog Demod GSM R amp S FSW K10 GSM GSM Multi Carrier Group Delay R amp S FSW K17 MCGD MC Group Delay Amplifier Measurements R amp S FSW K18 AMPLifier Amplifier Noise R amp S FSW K30 NOISE Noise Phase Noise R amp S FSW K40 PNOISE Phase Noise Transient Analysis R amp S FSW K60 TA Transient Analysis VSA R amp S FSW K70 DDEM VSA 3GPP FDD BTS R amp S FSW K72 BWCD 3G FDD BTS 3GPP FDD UE R amp S FSW K73 MWCD 3G FDD UE TD SCDMA BTS R amp S FSW K76 BTDS TD SCDMA BTS TD SCDMA UE R amp S FSW K77 MTDS TD SCDMA UE cdma2000 BTS
36. ERRor ESTimation IQOFfset STATe essent CONFigure SIGNal ERRor ESTimation SRATe STATe esee nennen ete ee SYNC CONFIJENCE RES CONFigure SYNG DOMaiiN EE EE UE dr ee E UE teen EEN dr eg DISPlay FORMat d D ETSI EUNEA ASIE T BISPlayEWINDowsrz P TABIe ITEM scanner ront orem tle ER rep eye ea eH E AE eE E EEGEN RUE VER Ou RE DISPlay WINDow lt n gt TABLe ITEM DISPlay WINDow n TRACe st X SCALe AUTO sess eee nnnm nnren nnne DISPlay WINDow lt n gt TRACe lt t gt X SCALe MAXimum is DISPlay WINDow n TRACe t X SCALe MINimum eeeeeeeeeneeeenneenenen ene enm DISPlay WINDow n TRACe st X SCALe PDlVision esses DISPlay WINDow n TRACe t X SCALe UNIT eeessseesseeeseeeeeenneenre nennen rennen nnne 188 DISPlay WINDow n TRACe t Y SCALe AUTO sese nnne nnnm iiaiai dasini 188 DISPlay WINDow n TRACe st Y SCALe MAXimum eese nennen 188 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe MINimum DISPlay WINDow lt n gt TRACe lt t gt Y SCALe PDIVision DISPlay WINDow n TRACe st Y SCALe RLEVVel seen DISPlay WiINDow lt n gt TRACe lt t gt Y SCALe RLEVe OFF Sefi siiin nennen 139 DISPlay WINDow n TRACe t Y SCALe R
37. FETCh POWer P2DB CURRent RESUult rsson tona etr tenete E eege peto verae ne Ee REY EP ee 112 FETCh POWer P3DB CURRent RESult c ror rrr ntn eterne ter nter d rere 112 FETCh PTABle ACP ACHannel n LOWer MAXimum X RESUIt eese 119 FETCh PTABIe ACP ACHannel n LOWer MAXimum Y RESUIt eese 119 FETCh PTABlIe ACP ACHannel n LOWer MAXimum RESUIt eese FETCh PTABle ACP ACHannel lt n gt LOWer MINimum X RESult FETCh PTABle ACP ACHannel lt n gt LOWer MINimum Y RESult FETCh PTABIe ACP ACHannel n LOWer MINimumr RESUlt sss 119 FETCh PTABIe ACP ACHannel n UPPer MAXimum X RESulI essen 120 FETOChP IABle AC ACHannel nz Uber MAxvimum vTREGSORT 0 cece eee ceeeseceeeeeeeeeeseeeseeeeeeneeeaneees 120 FETCh PTABIe ACP ACHannel n UPPer MAXimump RESUIt esee FETCh PTABle ACP ACHannel lt n gt UPPer MINimum X RESult FETCh PTABle ACP ACHannel lt n gt UPPer MINimum Y RESult FETCh PTABIe ACP ACHannel n UPPer MINimum RESUlt sss 120 FETCI PTABIe ACP MAXimum X ERESI snn rto cae e E retta ur eren cre t ere nnne netta 118 FETCh PTABIe ACP MAXimum Y ERESUIt ce teat ete tto qe e rera TE KEES REE tentat deene 118 FETCI ETABIe ACP MAXamumpRESUIE ctt et aeter rete tte Ete rne ntes 118 FETCI PTABIe ACP MINimum X RESUlt crier
38. If a trace is turned off the assigned markers and marker functions are also deactiva ted Remote command CALCulate n MARKer m TRACe on page 176 All Markers Off Deactivates all markers in one step Remote command CALCulate lt n gt MARKer lt m gt AOFF on page 176 Marker Table Display Defines how the marker information is displayed On Displays the marker information in a table in a separate area beneath the diagram Off Displays the marker information within the diagram area Auto Default Up to two markers are displayed in the diagram area If more markers are active the marker table is displayed automatically Remote command DISPlay MTAB1e on page 173 4 2 2 Positioning Markers Peak Sear EE 73 Search Next Peak annen a EEE a AER ta ed EP GUE 73 SSAC NV ul ll EEN T3 Search Next MININUM cereo dehet Pra aure e recen cepe e t oce a 73 Customizing Numerical Result Tables Peak Search Sets the selected marker delta marker to the maximum of the trace If no marker is active marker 1 is activated Remote command CALCulate n MARKer m MAXimum PEAK on page 180 CALCulate n DELTamarker m MAXimum PEAK on page 178 Search Next Peak Sets the selected marker delta marker to the next lower maximum of the assigned trace If no marker is active marker 1 is activated Remote command CALCulate lt n gt MARKer lt m gt MAXimum NEXT on page 179 CALCulate n DELTamarker m MAXimum NEX
39. PTABle ACP ACHannel lt n gt UPPer MINimum RESult These commands query the result values for the upper adjacent channel power as shown in the Parameter Sweep Table Suffix lt n gt irrelevant Return values lt Results gt lt numeric value gt e For RESult Minimum or maximum result that has been measured For X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTing Example FETC PTAB ACP ACH UPP MIN Y would return e g if the y axis represents the frequency 10000000 HZ Usage Query only FETCh PTABle AMAM CWIDth MAXimum X RESult FETCh PTABle AMAM CWIDth MAXimum Y RESult FETCh PTABle AMAM CWIDth MAXimum RESult FETCh PTABle AMAM CWIDth MINimum X RESult FETCh PTABle AMAM CWIDth MINimum Y RESult FETCh PTABle AMAM CWIDth MINimum RESult These commands query the result values for the AM AM Curve Width result as shown in the Parameter Sweep Table Return values Results Example Usage Performing Amplifier Measurements numeric value For RESult Minimum or maximum result that has been measured For
40. PURE GURFent RESultj 2i ice to onc a pinea Eden re EAE 115 IS ene MAXIMUM RESUM KE 115 FETCh VOGIMINImurmp RESU KEE 115 FETCH VCGC CURREnt RES KEE 115 FETCh APAE MAXimum RESult FETCh APAE MINimum RESult FETCh APAE CURRent RESult This command queries the Average PAE Power Added Efficiency as shown in the Result Summary Return values lt PAE gt lt numeric value gt Minimum maximum or current Average PAE depending on the command syntax Default unit Example FETC APAE CURR would return e g 1 231 Usage Query only Performing Amplifier Measurements Manual operation See Results to check the power supply characteristics of the amplifier on page 12 FETCh BBPower MAXimum RESult FETCh BBPower MINimum RESult FETCh BBPower CURRent RESult This command queries the measured baseband power I cc V cc as shown in the Result Summary Return values gt Power gt lt numeric value gt Minimum maximum or current power depending on the com mand syntax Default unit W Example FETC BBP CURR would return e g 0 75 Usage Query only Manual operation See Results to check the power supply characteristics of the amplifier on page 12 FETCh ICC MAXimum RESult FETCh ICC MINimum RESult FETCh ICC CURRent RESult This command queries the measured baseband current cc as shown in the Result Summary Return values Current
41. RESult FETCh PTABIe ACP ACHannel lt n gt LOWer MAXimum Y RESult FETCh PTABle ACP ACHannel lt n gt LOWer MAXimum RESult FETCh PTABle ACP ACHannel lt n gt LOWer MINimum X RESult FETCh PTABle ACP ACHannel lt n gt LOWer MINimum Y RESult FETCh PTABle ACP ACHannel lt n gt LOWer MINimum RESult These commands query the result values for the lower adjacent channel power as shown in the Parameter Sweep Table Suffix lt n gt Return values lt Results gt Example Usage irrelevant lt numeric value gt For RESult Minimum or maximum result that has been measured For X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTing FETC PTAB ACP ACH LOW MIN would return e g 10 945 DBM Query only Performing Amplifier Measurements FETCh PTABle ACP ACHannel lt n gt UPPer MAXimum X RESult FETCh PTABle ACP ACHannel lt n gt UPPer MAXimum Y RESult FETCh PTABle ACP ACHannel lt n gt UPPer MAXimum RESult FETCh PTABle ACP ACHannel lt n gt UPPer MINimum X RESult FETCh PTABle ACP ACHannel lt n gt UPPer MINimum Y RESult FETCh
42. TRAC Y UNIT would return e g DBM Usage Query only Managing Measurement Data MMEMOory LOADHOIS TAY Ces C 191 MMEMoiny STORe lt n 1O COMMON EE 191 MMEMon STObRecnzJOSTATe cece caeae eee neren eeeeeeeceteeeeeeeeeeeeeseeeeeesaeaeaaeaaaaaaaaaeaes 191 MEM STORG lt N gt TAG crete tarea cator tutte ci edd 192 MMEMory LOAD IQ STATe 1 lt FileName gt This command stores the currently captured UO data to a file After restoring the UO data the application also analyzes the data again Setting parameters 1 lt FileName gt String containing the path and file name Example MMEM LOAD IQ STAT 1 C IQData Amplfier iq tar Restores the specified UO data Usage Setting only MMEMory STORe n IQ COMMent Comment This command defines a comment for UO data you want to store Suffix n irrelevant Setting parameters Comment String containing the comment Example See MMEMory STORe lt n gt 1Q STATe MMEMory STORe lt n gt lQ STATe Number lt FileName gt This command stores the currently captured UO data to a file In secure user mode settings that are to be stored on the instrument are stored to vol atile memory which is restricted to 256 MB Thus a Memory full error may occur although the hard disk indicates that storage space is still available To store data permanently select an external storage location such as a USB memory device For details see
43. about the reference signal that is currently in use The information is only displayed when a reference signal has been successfully loa ded When you load a different waveform the reference signal information is updated accordingly Sample Rate 32 MHz Sample Length Waveform File e Sample rate The sample rate in the header of the currently used reference signal waveform file in Hz e Sample length Length of the currently used reference signal waveform file in samples Designing a Reference Signal e Waveform file Name and path of the waveform file currently in use Remote command Sample rate CONFigure REFSignal SINFo SRATe on page 133 Sample length CONFigure REFSignal SINFo SLENgth on page 133 Using multi segment waveform files Modern chip technologies implement several communication standards within one chip and thus increase the requirements in spatial design and test systems To fulfill the requirements in the test systems and to enable a rapid change between different waveforms containing different test signals the R amp S SMW provides the functionality to generate multi segment waveform files files that contain several different waveforms For more information about creating and using multi segment waveform files includ ing examples refer to the documentation of the R amp S SMW When you are testing amplifiers with the R amp S FSW K18 you can use a multi segment waveform file to create t
44. always uses the ana log mixer path Auto Default The direct path is used automatically for frequencies close to zero Off The analog mixer path is always used Remote command INPut DPATh on page 135 High Pass Filter 1 3 GHz Activates an additional internal high pass filter for RF input signals from 1 GHz to 3 GHz This filter is used to remove the harmonics of the analyzer in order to measure the harmonics for a DUT for example This function requires an additional hardware option Note for RF input signals outside the specified range the high pass filter has no effect For signals with a frequency of approximately 4 GHz upwards the harmonics are suppressed sufficiently by the YIG filter Remote command INPut FILTer HPASs STATe on page 135 YIG Preselector Activates or deactivates the YIG preselector if available on the R amp S FSW An internal YIG preselector at the input of the R amp S FSW ensures that image frequen cies are rejected However this is only possible for a restricted bandwidth In order to use the maximum bandwidth for signal analysis you can deactivate the YIG preselector at the input of the R amp S FSW which may lead to image frequency display R amp S9FSW K18 Configuring Amplifier Measurements Note that the YIG preselector is active only on frequencies greater than 8 GHz There fore switching the YIG preselector on or off has no effect if the frequency is below that value Remote co
45. anaes eR ERR REI 162 CONFigure DPD AMAM STATe State This command turns calculation of AM AM predistortion on and off Parameters State ON OFF RST ON Example CONF DPD AMAM ON Turns on calculation of AM AM curve Manual operation See Selecting the order of model calculation on page 58 Configuring Amplifier Measurements CONFigure DPD AMPM STATe State This command turns calculation of AM PM predistortion on and off Parameters State ON OFF RST ON Example CONF DPD AMPM ON Turns on calculation of AM PM curve Manual operation See Selecting the order of model calculation on page 58 CONFigure DPD AMXM STATe State This command turns calculation of AM AM and AM PM predistortion on and off at the same time Alternatively you can do that with CONFigure DPD AMAM STATe and CONFigure DPD AMPM STATe Parameters State ON OFF Example CONF DPD AMXM ON Calculates both AM AM and AM PM predistortion Usage Setting only Manual operation See Selecting the order of model calculation on page 58 CONFigure DPD FNAMe lt FileName gt This command defines a name for the DPD correction table Parameters lt FileName gt String containing the DPD table file name Example CONF DPD FNAM DPDTable Defines the table name DPDTable Manual operation See Selecting the DPD shaping method on page 58 CONFigure DPD SEQuence lt State
46. and are described in the R amp S FSW User Manual The latest versions of the manuals are available for download at the product homepage http www2 rohde schwarz com product FSW html Installation Find detailed installing instructions in the Getting Started or the release notes of the R amp S FSW e Stating tie APpUCAUOMN crore tea nt des eret ente o tl ette opt dre dioi 7 e Understanding the Display Informoation ent 8 1 1 Starting the Application The amplifier measurement application adds a new type of measurement to the R amp S FSW To activate the the Amplifier application 1 Press the MODE key on the front panel of the R amp S FSW A dialog box opens that contains all operating modes and applications currently available on your R amp S FSW 2 Select the Amplifier item The R amp S FSW opens a new measurement channel for the Amplifier application All settings specific to amplifier measurements are in their default state R amp S FSW K18 Welcome to the Amplifier Measurement Application 1 2 Understanding the Display Information The following figure shows the display as it looks for amplifier measurements All differ ent information areas are labeled They are explained in more detail in the following sections MultiView Spectrum Amplifier Ref Level 0 00 dBm Meas Time 3 d L v Att 10dB Freq 13 25 GHz MeasBW 2 z SRate YIG Bypass 1 Magnitude Capture RF 2 Count 1 1 Input
47. and only for a channel defined sequence In this case a channel in continuous sweep mode is swept repeatedly Furthermore the RUN CONT key controls the Sequencer not individual sweeps RUN CONT starts the Sequencer in continuous mode Remote command INITiate lt n gt CONTinuous on page 99 Single Sweep RUN SINGLE After triggering starts the number of sweeps set in Sweep Count The measurement stops after the defined number of sweeps has been performed While the measurement is running the Single Sweep softkey and the RUN SINGLE key are highlighted The running measurement can be aborted by selecting the high lighted softkey or key again Note Sequencer If the Sequencer is active the Single Sweep softkey only controls the sweep mode for the currently selected channel however the sweep mode only has an effect the next time the Sequencer activates that channel and only for a chan nel defined sequence In this case a channel in single sweep mode is swept only once by the Sequencer Furthermore the RUN SINGLE key controls the Sequencer not individual sweeps RUN SINGLE starts the Sequencer in single mode If the Sequencer is off only the evaluation for the currently displayed measurement channel is updated Remote command INITiate n IMMediate on page 99 Designing a Reference Signal Continue Single Sweep While the measurement is running the Continue Single Sweep softkey and the RUN SINGLE key are highli
48. c ie dle de ed 52 Turning synchronization of reference and measured signal on and off During measurements the application tries to synchronize the measured signal with the reference signal When no significant correlation between the measured and refer ence signal can be found synchronization fails However you can turn synchronization off in case you would like to perform unsynchronized measurements Note however that the calculation of some results in the Result Summary requires synchronization These cannot be calculated when you turn off synchronization When you turn off synchronization the results are always calculated over the complete capture buffer When synchronization is on the results are always calculated over the synchronized data range of the capture buffer Therefore the result values may be dif ferent for unsynchronized measurements even if you measure the same signal the result is still valid and correct though Failed synchronization When you turn on Stop on Sync Failed the application automatically aborts the mea surement in case synchronization fails Remote command CONFigure SYNC STATe on page 153 CONFigure SYNC SOFail on page 152 Selecting the synchronization method The application allows you to select the method with which the application synchroni zes the signals with the Sync Domain parameter The following methods are availa ble e Q Direct The I Q data for the reference signal is
49. command defines the peak input power of the DUT This is necessary when you turn off CONFigure REFSignal CWF ETGenerator STATe Parameters Power numeric value Default unit dBm Example CONF REFS CWF ETG OFF CONF REFS CWF DPIP 3 Defines a DUT input power of 3 dBm Manual operation See Designing a reference signal in a waveform file on page 30 CONFigure REFSignal CWF ETGenerator STATe State This command turns the transfer of the reference signal data to a generator on and off Parameters State ON Reference signal data is transferred to the generator and gener ated with the generator OFF Reference signal data is not transferred to the generator but simulated by the analyzer based on the information of the wave form file When you turn it off you have to define the peak input power of the DUT with CONFigure REFSignal CWF DPIPower RST ON Example CONF REFS CWF ETG OFF Analyzer simulates the reference signal Configuring Amplifier Measurements Manual operation See Designing a reference signal in a waveform file on page 30 CONFigure REFSignal CWF FPATh lt FileName gt This command selects a waveform file containing a reference signal Parameters lt FileName gt String containing the name and path to the waveform file Example CONF REFS CWF FPAT C RefSignal wv Selects a waveform file on drive c called RefSignal wv Manual operation See Designing a refere
50. configure triggered measurements is similar as that provided in the Spectrum application For a comprehensive description of the trigger functionality please refer to the R amp S FSW User Manual The functionality to configure those trigger sources is similar as that provided in the Spectrum application For a comprehensive description of the trigger functionality please refer to the R amp S FSW User Manual 3 6 Configuring the Data Capture The Data Acquisition dialog box contains settings to configure the process of how the application records the signal gt To access the data acquisition settings proceed as follows e Inthe Configuration Overview select the Data Acquisition button and then the Data Acquisition tab e Press the MEAS CONFIG key and then select the Data Acquisition softkey e Press the BW key and then select the Bandwidth Config softkey Configuring the Data Capture Data Acquisition Data Acquisition Sample Rate Analysis Bandwidth Max Bandwidth Capture Time Capture Length Ref Signal Duration Swap IQ Configuring the measurement bandwidth ditio not cette din d exui 48 Configuring the measurement time ciiin NA aaas 49 Inverting the ee ee 50 Configuring the measurement bandwidth The sample rate defined for data acquisition is the sample rate with which the analyzer samples the amplified signal The measurement bandwidth defines the flat usable bandwidth of the final
51. e ent e nts 147 CONFigure GENerator EXTernal ROSCillator Source This command selects the source of the generator reference frequency Parameters Source EXT The generator uses the reference frequency of the analyzer INT The generator uses its own reference frequency Example CONF GEN EXT ROSC INT Selects the reference frequency of the generator CONFigure GENerator EXTernal ROSCillator LEDState This command queries the state of the connection to the external reference Return values State GREen Connection was successful GREY Unknown connection state RED Connection was not successful Example CONF GEN EXT ROSC LEDS would return e g RED Configuring Amplifier Measurements Usage Query only CONFigure GENerator FREQuency CENTer Frequency This command defines the frequency of the generator Parameters Frequency numeric value Default unit Hz Example CONF GEN FREQ CENT 100000000 Defines a generator frequency of 100 MHz Manual operation See Center Frequency on page 46 CONFigure GENerator FREQuency CENTer LEDState This command queries the frequency synchronization state Return values State GREen Frequency synchronization was successful GREY Unknown frequency synchronization state RED Frequency synchronization was not successful Example CONF GEN FREQ CENT L
52. eene 56 Defining He MOMS MO WANG cater terti etie tede erg dece tne ete a 56 Turning system modeling on and off The R amp S FSW K18 provides functionality to calculate a mathematical model that describes the properties of the DUT Using a model is useful to observe and estimate the behavior of the amplifier and if necessary adjust the DUT behavior The application supports memory free polynomial models to the 18th degree The following diagrams contain traces that show the model These traces are calcula ted by using the model function on the reference signal e AM AM e AM PM Note that the model traces are also the basis for the DPD functionality available in the R amp S FSW K18 When the characteristics of the modeled signal matches those of the measured signal the model describes the DUT behavior well If not you can try to get a better result by adjusting the model properties R amp S9FSW K18 Configuring Amplifier Measurements ie qam When you turn on modeling the application shows an additional trace in the graphical result displays This trace corresponds to the signal characteristics after the model has been applied to the reference signal Selecting the modeling sequence The modeling sequence selects the sequence in which the models are calculated The application then either calculates the AM AM model before calculating the AM PM mode
53. ers mA AOF E 176 CAL Culate n MARKer m STATe 2 2 2 222 1 reo ete duse env EEE ET SEENEN 176 CAL Culate nz M bkercmz TR ACe esten tisshsesstii rasta sensi sa sss sn inis 176 CAL Culate nz M Abkercmz Ne 177 CAL Gulate ms MARKeremistW EE 177 CALCulate lt n gt DELTamarker lt m gt AOFF This command turns all delta markers off lt m gt is irrelevant Example CALC DELT AOFF Turns all delta markers off Usage Event CALCulate lt n gt DELTamarker lt m gt MREF Reference This command selects a reference marker for a delta marker other than marker 1 Parameters Reference Example CALC DELT3 MREF 2 Specifies that the values of delta marker 3 are relative to marker 2 Manual operation See Reference Marker on page 72 Analyzing Results CALCulate lt n gt DELTamarker lt m gt STATe State This command turns delta markers on and off If necessary the command activates the delta marker first No suffix at DELTamarker turns on delta marker 1 Parameters State ON OFF RST OFF Example CALC DELT2 ON Turns on delta marker 2 Manual operation See Marker State on page 71 See Marker Type on page 71 CALCulate lt n gt DELTamarker lt m gt TRACe Trace This command selects the trace a delta marker is positioned on Note that the corresponding trace must have a trace mode other than Blank If necessary the command activates the marker fir
54. eye on the RMS level especially when defining a level offset because a level offset changes the displayed value of the RMS level but not the real RMS level Displayed RMS Level Real RMS Level Level Offset Thus the actual RMS level may be higher than the displayed level Note Make sure to always change the generator level from within the R amp S FSW K18 user interface and thus synchronize the level of both instruments If you change the generator level on the signal generator the R amp S FSW K18 won t synchronize the levels and measurement results are going to be invalid Remote command RMS level CONFigure GENerator POWer LEVel on page 144 CONFigure GENerator POWer LEVel LEDState on page 144 Level offset CONFigure GENerator POWer LEVel OFFSet on page 145 CONFigure GENerator POWer LEVel OFFSet LEDState on page 145 Attach to R amp S FSW Frequency Turns synchronization of the analyzer and generator frequency on and off When you turn this feature on changing the frequency on the analyzer automatically adjusts the frequency on the generator Remote command CONFigure GENerator FREQuency CENTer SYNC STATe on page 143 Center Frequency Defines the frequency of the signal that the generator transmits When you turn Attach to R amp S FSW Frequency on any changes you make to the gen erator frequency are also adjusted on the analyzer Remote command CONFigure GENerator FREQuency CENTer on page 143 CONFigure G
55. from the RF input connector or the optional Analog Baseband connector This command is only available if the Analog Baseband interface R amp S FSW B71 is installed and active for input It is not available for the R amp S FSW67 or R amp S FSW85 For more information on the Analog Baseband Interface R amp S FSW B71 see the R amp S FSW UO Analyzer and UO Input User Manual Parameters lt ConnType gt RF RF input connector AIQI Analog Baseband connector RST RF Configuring Amplifier Measurements Example INP CONN AIQI Selects the analog baseband input Usage SCPI confirmed Manual operation See Input Connector on page 37 INPut COUPling lt CouplingType gt This command selects the coupling type of the RF input Parameters lt CouplingType gt AC AC coupling DC DC coupling RST AC Example INP COUP DC Usage SCPI confirmed Manual operation See Input Coupling on page 35 INPut DPATh lt State gt Enables or disables the use of the direct path for frequencies close to 0 Hz Parameters lt State gt AUTO 1 Default the direct path is used automatically for frequencies close to 0 Hz OFF 0 The analog mixer path is always used RST 1 Example INP DPAT OFF Usage SCPI confirmed Manual operation See Direct Path on page 36 INPut FILTer HPASs STATe lt State gt Activates an additional internal high pass filter for RF input signals from 1 GHz to 3 GHz This filter is used to remove the
56. gt DATA on page 102 PAE vs Time The PAE Time result display shows the Power Added Efficiency against time User Manual 1176 9893 02 03 17 R amp S FSW K18 Performing Amplifier Measurements The x axis represents the time in seconds The y axis shows the efficiency in based on the following formula PAE RF Output Power RF Input Power DC Power 5 PAE vs Time 163 830001839 us Remote command Selection LAY OUT PAET Result query TRACe n DATA on page 102 Power vs Time The Power vs Time result display shows the supply power of the power amplifier against time The results are calculated by multiplying the supply voltage with the supply current which are recorded at the baseband inputs of the R amp S FSW The unit of the results is W For valid results make sure that you have configured the measurement correctly regarding the equipment you are using see Configuring PAE measurements Power Added Efficiency on page 60 5 PAE vs Time 163 830001839 us Remote command Selection LAY ADD PVT Result query TRACe n DATA on page 102 Raw EVM The Raw EVM result display shows the error vector magnitude of the signal over time The EVM is a measure of the modulation accuracy It compares two signals and shows the distance of the measured constellation points and the ideal constellation points In the R amp S FSW K18 you can compare the measured signal against the reference si
57. gt This command selects the order in which the AM AM and AM PM distortion are calcu lated Available when both CONFigure DPD AMAM STATe and CONFigure DPD AMPM STATe have been turned on Configuring Amplifier Measurements Parameters Order AMFirst Calculates the AM AM distortion first then the AM PM distortion PMFirst Calculates the AM PM distortion first then the AM AM distortion Example CONF DPD SEQ AMF Calculates the AM AM curve first Manual operation See Selecting the order of model calculation on page 58 CONFigure DPD SHAPing MODE Method This command selects the method use to shape the DPD function Parameters Method POLYnomial DPD function based on the characterstics of the polynomial sys tem model TABLe DPD function based on the correction values kept in a table cal culated by the R amp S SMW RST TABLe Example CONF DPD SHAP MODE TABL DPD function based on correction values kept in a table Manual operation See Selecting the DPD shaping method on page 58 CONFigure DPD TRADeoff Percentage This command defines the power linearity tradoff for DPD calculation Parameters Percentage numeric value Default unit PCT Example CONF DPD TRAD 75 Defines a tradeoff of 75 96 Manual operation See DPD Power Linearity Tradeoff on page 59 CONFigure DPD UPDate This command updates the DPD shaping tables on the R amp S SMW when modeling parameters
58. harmonics of the R amp S FSW in order to mea sure the harmonics for a DUT for example This function requires an additional high pass filter hardware option Note for RF input signals outside the specified range the high pass filter has no effect For signals with a frequency of approximately 4 GHz upwards the harmonics are suppressed sufficiently by the YIG filter Configuring Amplifier Measurements Parameters State ON OFF RST OFF Example INP FILT HPAS ON Turns on the filter Usage SCPI confirmed Manual operation See High Pass Filter 1 3 GHz on page 36 INPut FILTer YIG STATe State This command turns the YIG preselector on and off Note the special conditions and restrictions for the YIG filter described in YIG Prese lector on page 36 Parameters State ON OFF 0 1 RST 1 0 for UO Analyzer GSM VSA and MC Group Delay measurements Example INP FILT YIG OFF Deactivates the YIG preselector Manual operation See YIG Preselector on page 36 INPut IMPedance Impedance This command selects the nominal input impedance of the RF input In some applica tions only 50 O are supported 75 Q should be selected if the 50 Q input impedance is transformed to a higher impe dance using a matching pad of the RAZ type 25 Q in series to the input impedance of the instrument The power loss correction value in this case is 1 76 dB 10 log 750 500 Parameters Impedance 50
59. is provided by the electronic attenuator as much as possible to reduce the amount of mechanical switching required Mechanical attenua tion may provide a better signal to noise ratio however When you switch off electronic attenuation the RF attenuation is automatically set to the same mode auto manual as the electronic attenuation was set to Thus the RF attenuation may be set to automatic mode and the full attenuation is provided by the mechanical attenuator if possible Both the electronic and the mechanical attenuation can be varied in 1 dB steps Other entries are rounded to the next lower integer value For the R amp S FSW85 the mechanical attenuation can be varied only in 10 dB steps If the defined reference level cannot be set for the given attenuation the reference level is adjusted accordingly and the warning Limit reached is displayed in the status bar Remote command INPut EATT STATe on page 140 INPut EATT AUTO on page 140 INPut EATT on page 140 Using Probes The Probes tab of the Input Output dialog box contains settings to configure and use probes Probes are a mandatory part of the test setup if you want to perform measurements measurements that take into account the supply voltage and the current drawn by the PA gt Select the Input Output button from the Configuration Overview dialog box then select the Probes tab For more information about the contents of the Probes dialog box p
60. maximum or current Phase Error depending on the command syntax Default unit degree Example FETC MACC PERR CURR would return e g 1 84 Usage Query only Manual operation See Results to check modulation accuracy on page 11 FETCh MACCuracy QERRor MAXimum RESult FETCh MACCuracy QERRor MINimum RESult FETCh MACCuracy QERRor CURRent RESult This command queries the Quadrature Error as shown in the Result Summary Performing Amplifier Measurements Return values lt QuadratureError gt numeric value Minimum maximum or current Quadrature Error depending on the command syntax Default unit degree Example FETC MACC QERR MAX would return e g 2 76 Usage Query only Manual operation See Results to check modulation accuracy on page 11 FETCh MACCuracy REVM MAXimum RESult FETCh MACCuracy REVM MINimum RESult FETCh MACCuracy REVM CURRent RESult This command queries the Raw EVM as shown in the Result Summary Return values lt EVM gt lt numeric value gt Minimum maximum or current Raw EVM depending on the command syntax Default unit Example FETC MACC REVM MAX would return e g 3 606 Usage Query only Manual operation See Results to check modulation accuracy on page 11 FETCh MACCuracy RMEV MAXimum RESult FETCh MACCuracy RMEV MINimum RESult FETCh MACCuracy RMEV CURRent RESult This command queries the Raw Model EVM as shown in
61. n gt MARKer lt m gt FUNCtion POWer RESult Measurement This command queries the numerical results of the ACP measurement Suffix n irrelevant m irrelevant Configuring Amplifier Measurements Query parameters Measurement ACP Queries the results of the ACP measurement Returns the power for every active transmission and adjacent channel The order is power of the transmission channels power of adjacent channel lower upper Example CALC MARK FUNC POW RES would return e g 21 76 3421 2257 Usage Query only Manual operation See Adjacent Channel Power ACP on page 13 SENSe POWer ACHannel AABW State This command turns automatic selection of the measurement bandwidth for ACP mea surements on and off When you turn this on the application selects a measurement bandwidth that is large enough to capture all channels evaluated by the ACP measurement Parameters State ON OFF Example POW ACH AABW ON Turns on automatic selection of the measurement bandwidth Manual operation See Selecting the measurement bandwidth on page 63 SENSe POWer ACHannel ACPairs lt ChannelNumber gt This command selects the number of adjacent channels evaluated in the ACP mea surement Parameters ChannelNumber lt numeric value integer only Number of adjacent channels to the left and right of the Tx chan nel RST 1 Example POW ACH ACP 2 Evaluates two pairs of
62. o ERE TRE RIA une 180 CALCulate n MARKer m MINimum RIGHEl 2eac cinese iste eai ei a a 180 CALCulatesn MARKers m MlINimu m PEAK aicut nhat e rin eon rto rea e eatur 180 CAL Culatesn MARKer m TRAGO cie icone epa rc coppa tar e crecer Ce kara eee xe enda ve de tees DE ES DE FREE 176 GAL GCulatesn MARKer stmIo X eegene Segel aa lea tn e avd 177 CALCulatesnz MABRKer m Y EE 177 CALCulate lt n gt MARKer lt m gt STATe CALCulatesn UNIT ANGLO orc rtt a Eie orte tin ee ae ees CALibration Al el d int TEE KEE GONFigure DPD AMAMU Tele Zosen eens o coc a iret Ee ENEE CONFig re DPD AMPMES TATe ic Ha e tto teet tpe tabe Eed CONFig re DPD AMXME S TATe iaiiioao rao ceo tenta tp set eet UY alacant a cena ease cx e Rodin EE Kl ET EE 160 CONFigure DPD SEQuence 160 CONFigure DPD SHAPing MODE 2 eir creer ete t Eri rcge ca tee ian ei vie E ER edo b re DE ER e 161 CONFIQUre DPD MIRA SOLE EE 161 CONFigure DPD UPI le cr torpet tec tete vet gp Ege aate hala v ve d 161 GONFigure DPD UPDate LEDState itr rmn mre i trt eec ERR FER 162 ee ni Teri i e ais TimatlOms FUE genge 151 CONFigure ES Timation STAR essiant ra i easar aE e FR ERE LESE ve TENER Sn 151 CONFigure ESTimation STOP ete ee lee le D E c CONFigure EVALuation S lARLU i ctt rto tener ee ENEE een ten e er Eee een PE pe
63. page 79 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RPOSition Position This command defines the position of the reference value Analyzing Results You can define the reference value with DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RVALue Suffix n 1 n t 1 n Parameters Position numeric value Default unit 96 Example DISP TRAC Y AUTO OFF DISP TRAC Y RVAL ODBM DISP TRAC Y RPOS 80 Positions the reference value at the 80 mark of the y axis Manual operation See Scaling the y axis manually on page 79 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RVALue Reference This command defines the reference value of a result display Available when you turn off automatic scaling with DISPlay WINDow lt n gt TRACe t Y SCALe AUTO Suffix n 1 n t 1 n Parameters Reference numeric value Default unit The unit depends on the result display Example DISP TRAC Y AUTO OFF DISP TRAC Y RVAL 10DB Defines a reference value of a 10 dB Manual operation See Scaling the y axis manually on page 79 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe UNIT This command queries the unit of the y axis Suffix lt n gt 1 n Selects the measurement window t irrelevant Return values Unit Unit of the y axis in the selected window 5 7 6 Analyzing Results Example DISP WIND3
64. queries the sample rate of the currently used reference signal Return values lt SampleRate gt lt numeric value gt Default unit Hz Example CONF REFS SINF SRAT would return e g 32000000 5 6 2 Configuring Amplifier Measurements Usage Query only Selecting and Configuring the Input Source CALibration AIQ HATiming S TATe esses nennen rere nnn in ennt 134 EE ere mat EMEN 134 INPURGCOUP ING 135 fIr e Eu H EE 135 INPutFIETerHPASSESTATe rre c eekenene bp REESEN EENS eae bb eec ka 135 INPut FIE rer VIGES TATQ teda vite aee oet e ett Red certat ad gie ches 136 INPUUIMPed ance M 136 INPuCIO BAL ancedf STATE cece eee inania paia iaiia aiiai titre rena 136 INPut SEEectBBANAaleg S FA Te cadente ttt oerte e tnt ve eaae 137 CALibration AIQ HATiming STATe State Activates a mode with enhanced timing accuracy between analog baseband RF and external trigger signals Parameters State ON OFF 1 0 ON 1 The high accuracy timing function is switched on The cable for high accuracy timing must be connected to trigger ports 1 and 2 OFF 0 The high accuracy timing function is switched off RST OFF Example CAL AIQ HAT STAT ON Manual operation See High Accuracy Timing Trigger Baseband RF on page 38 INPut CONNector lt ConnType gt Determines whether the RF input data is taken
65. reference signal Let s say you want to evaluate milliseconds 2 to 6 of the reference signal In that case you would have to define a start offset of 11 ms the reference signal starts at 9 ms plus the first 2 ms you are not interested in 11 ms and a stop offset of 15 ms 9 ms 6 ms In the preview pane displayed in the dialog box the currently defined evaluation range is represented by two blue vertical lines Tip You can also move the corresponding lines in the preview pane with your fingers to a new position However this is not as accurate as entering a number into the input field Remote command CONFigure EVALuation FULL on page 153 CONFigure EVALuation STARt on page 154 CONFigure EVALuation STOP on page 154 Estimating and Compensating Signal Errors The application allows you to estimate possible undesired effects in the signal and if there are any also compensate these effects gt To access error estimation and compensation proceed as follows e Inthe Configuration Overview select the Sync Error Est Comp button and then the Error Est Compensation tab e Press the MEAS CONFIG key select the Sync Error Est Comp softkey and then the Error Est Compensation tab Sync and Eval Range Error Est Compensation Signal Error Estimation Signal Error Cor I Q Imbalance On I Q Imbalance Amplitude Droop on Off Amplitude Droop Sample Error Rate m Off Sample Error Rate Config
66. rel to Ref Signal Start 50 001 us Defining the evaluation range nennen nennen nnns 53 Defining the evaluation range The evaluation range defines the data range in the capture buffer over which the appli cation calculates the measurement results By default the application calculates the results over the complete capture buffer If synchronization has been succesful the application calculates the results over the cap ture buffer range in which the reference signal has been found If you have turned off synchronization or if it hasn t been successful the complete capture buffer is used to calculate the remaining results Example The capture buffer is 30 ms long the reference signal starts at 9 ms and is 10 ms long In case of successful synchronization the evaluation range starts at 9 ms and ends at 19 ms If synchronization has been turned off the evaluation range is the full capture buffer However you can also select a particular data range within the reference signal In that case turn off the Use Full Ref Signal feature When this is off the Eval Start and Eval Stop fields become available The allowed values are offsets relative to the beginning of the reference signal 0 s The highest offset possible depends on the length of the reference signal User Manual 1176 9893 02 03 53 3 9 Estimating and Compensating Signal Errors Example The situation is as described above 30 ms capture buffer 10 ms
67. rtr Baseband measurements ssssssssseses 59 Blue WSU e ceedevaceeastead 52 C Calculation lgl jer c M Capture buffer Capture tiME sinisa R Channel bar Displayed information rre rennes 8 Clock rate Reference signal nodo ert eren 27 32 Signal analysis oci treten nnn i een 48 Signal TEE 32 Closing Channels remote Windows remote Compensating Bir 54 Compression poils 2 crt terere 62 Confiderice l amp vel i iiic cede Cena contiene 52 Continue single sweep kc M 27 Continuous sweep SOKO cicer eet rre ren 26 Conventions Ee Geelen Ein EE ER Copying Measurement channel remote ssss 87 Coupling Input FEMOLE EE 135 Crest factor Reference Signal rtr enne eren 33 Current xu Meas rinig err rennes 37 D Brel ormer ascasacianeuy reese tengetuesteaseeastseaneent 47 DC offset Analog Baseband B71 remote control 134 Degree of model Se BI Run EE T lee Differential input Analog Baseband B71 remote control Analog Baseband DI Digital predistortion Eegeregie ege 57 Direct path MPUL COMMQUPALOMN euesgtre eege gedegeg Eed gees 36 REMOTE p 135 Display nformati mere eenen Cote epe eer repa E AEEA 8 Display line BIUS aara nene Ee
68. signal IQPDiff Correlation on the phase differentiated UO data MAGNitude Correlation on the magnitude of the UO data with no regard for phase information TRIGger It is assumed that the capture is triggered at the start of the ref erence waveform CONF SYNC DOM IQD Tries to find a correlation in the raw UO data See Selecting the synchronization method on page 51 CONFigure SYNC SOFail State This command turns a measurement stop when synchronization of measured and ref erence signal fails on and off Configuring Amplifier Measurements Parameters State ON OFF RST OFF Example CONF SYNC SOF ON Stops the measurement when synchronization fails Manual operation See Turning synchronization of reference and measured signal on and off on page 51 CONFigure SYNC STATe State This command turns synchronization between reference and measured signal on and off Parameters State ON OFF RST ON Example CONF SYNC STAT ON Turns on synchronization between reference and measured sig nal Manual operation See Turning synchronization of reference and measured signal on and off on page 51 FETCh SYNC FAIL This command queries the synchronization state Return values lt State gt ON Synchronization was successful OFF Synchronization was not successful Example FETC SYNC FAIL would return e g OFF Usage Query only 5 6 8 Defining t
69. signal gain in dB The gain is represented by a colored cloud of values The cloud is based on the recor ded samples In case of samples that have the same values and would thus be super imposed colors represent the statistical frequency with which a certain level gain combination occurs in recorded samples Blue pixels represent low statistical frequen cies red pixels high statistical frequencies A color map is provided within the result display 4 Gain Compression 60 0 dBm 15 0 dBm Remote command Selection LAY ADD GC Result query TRACe n DATA on page 102 Magnitude Capture RF and Q The Magnitude Capture result display contains the raw data that has been recorded and thus represents the characteristics of the DUT It is available for the data recorded on the RF input and both baseband inputs and Q channels Note that the and Q channel capture buffers are only available when par allel baseband capture has been turned on murum EPI ICE eee User Manual 1176 9893 02 03 16 R amp S FSW K18 Performing Amplifier Measurements The capture buffer shows the signal level over time The unit is either dBm RF cap ture V or A baseband capture In case of the baseband capture all multipliers and offsets are already included in the results The raw data is source for all further evaluations You can also use the data in the cap ture buffer to identify the causes for possible unexpected resul
70. signal is to define its characteristics in a waveform file wv or iq tar You can create a waveform file for example e with the R amp S WinIQSIM2 software package e by exporting a signal designed on the signal generator Basically this file contains the characteristics of the reference signal The generator then generates the reference signal based on the information in the file There are two ways to generate the reference signal through a custom waveform file The generator is connected to the R amp S FSW in a LAN and can be recognized by the R amp S FSW K18 Rohde amp Schwarz generators only for example the R amp S SMW In that case you can simply transfer the reference signal information to the genera tor with the features integrated into the R amp S FSW K18 This then generates the corresponding signal with the appropriate signal level and the R amp S FSW K18 is able to compare the measured signal to the ideal reference signal The generator is not connected to the R amp S FSW In that case you have to load the reference signal information onto the generator manually and turn off the Export to Generator function Because no exchange of information is possible between generator and analyzer it is required to specify the input level of the signal in the DUT Peak Input Power input field Designing a Reference Signal For a comprehensive description of all features available on the signal generator and informa
71. so the application shows correct power results All displayed power level results will be shifted by this value The reference level offset takes level offsets into account that occur after the signal has passed through the DUT usually an amplifier For level offsets occuring before the DUT you can define a level offset on the signal generator from within the R amp S FSW K18 user interface The setting range is 200 dB in 0 01 dB steps Note however that the internal reference level used to adjust the hardware settings to the expected signal optimally ignores any Reference Level Offset Thus it is impor tant to keep in mind the actual power level the R amp S FSW must handle and not to rely on the displayed reference level internal reference level displayed reference level offset Remote command DISPlay WINDowcn TRACe t Y SCALe RLEVel OFFSet on page 139 Full Scale Level The full scale level defines the maximum power you can input at the Baseband Input connector without clipping the signal e 025V e 05V e 1V e 2V If probes are connected the possible full scale values are adapted according to the probe s attenuation and maximum allowed power Available for parallel capture on the baseband and RF inputs Remote command INPut IQ FULLscale LEVel on page 141 Configuring Inputs and Outputs Preamplifier If the optional Preamplifier hardware is installed a preamplifier can be activated for the
72. the Amplitude dialog box described elsewhere Input Coupling on page 35 e Impedance on page 36 Reference Level E 41 L Shifting the Display Offset entrenar aE 41 Full Scale E WEE 41 xis m ere 42 MPU COUP e 42 Configuring Inputs and Outputs Tier mme 42 Attenuation Mode Vallie 1 rre o ee eA ERE XR SNR Mane e ERR EES 42 Using Electronic Attenuatioh iiieeeeeecieeneceec eere e runner epp nne h pnta enc R Rn nna e REX Resa 43 Reference Level Defines the expected maximum reference level Signal levels above this value may not be measured correctly which is indicated by the IF OVLD status display The reference level is also used to scale power diagrams the reference level is then used as the maximum on the y axis Since the hardware of the R amp S FSW is adapted according to this value it is recom mended that you set the reference level close above the expected maximum signal level to ensure an optimum measurement no compression good signal to noise ratio Remote command DISPlay WINDow n TRACe t Y SCALe RLEVel on page 139 Shifting the Display Offset Reference Level Defines an arithmetic level offset This offset is added to the measured level The scal ing of the y axis is changed accordingly Define an offset if the signal is attenuated or amplified before it is fed into the R amp S FSW
73. the data has been transfered the signal generator for example the R amp S SMW generates the corresponding signal The generated signal is a multicarrier signal with OFDM characeristics whose basic properties like crest factor and bandwidth you can specify as required Designing a Reference Signal Current Generator Waveform Custom Waveform File Generate Own Signal Generate own Refer ignal Clock Rate 0 MHz Pulse Duty Cycle 100 0 Signal BW 20 0 MHz Ramp Length Signal Length 16384 sium Amp Tools ET Di de d ETS ET 10 0 dB Notch Position 0 0 Hz Notch Width 0 0 Hz Generate and Load Signal and Export it to R amp S SMW jnal Information Sample Rate Sample Length 40000 Waveform File ARB i j RF RF To generate a reference signal within the application proceed as follows gt n the Generated Reference Signal tab design the reference signal as required The application stores the current signal properties as an ARB signal in a waveform file gt Upload the data to the generator with the Send Signal to R amp S SMW button You can define the following signal characteristics Clock Rate on page 32 Signal Bandwidth on page 32 Signal Length on page 33 Crest Factor on page 33 Notch Width on page 33 Notch Position on page 33 Pulse Duty Cycle on page 33 Ramp Length on page 34 Waveform File Name on page 34 Remote command CONFigure REFSignal GOS WRITe on page 133 CONFigure REFSignal G
74. with the reference signal and provides various features to control synchronization Synchronization consists of signal estimation and compensation After the application has detected the position of the reference signal in the capture buffer it estimates pos sible errors in the measured signal for example the sample error rate or the amplitude droop by comparing it to the reference signal The estimated errors can optionally be compensated for gt To access synchronization settings proceed as follows e Inthe Configuration Overview select the Sync Error Est Comp button then the Sync and Eval Range tab and then the Synchronization tab e Press the MEAS CONFIG key select the Sync Error Est Comp softkey then the Sync and Eval Range tab and then the Synchronization tab Sync and Eval Range Error Est Compensation 0 0s 1 25 ms Synchronization Evaluation Range Signal Synchronization Synchronization Stop on Sync Fail Sync Mode Use Full Ref Signal Sync Start rel to Ref Signal Start Sync Stop rel to Ref Signal Start 00 013 us Sync Confidence 95 0 User Manual 1176 9893 02 03 Synchronizing Measurement Data Turning synchronization of reference and measured signal on and off 51 Selecting the synchronization method eene nnn 51 Defining a synchronization Confidence eye 52 Defining thiesimatloDi allg 4 coerceri es elt bene ce
75. 154 5 6 10 Applying a System Model 157 5 6 11 Applying Digital Predistortion cicero netta acere i nhat eaa 159 5 6 12 Configuring Envelope Tracking nnne 162 5 6 13 Configuring ACP Measurements ener nne 163 5 6 14 Configuring Power Measurements een ene nennen 165 5 6 15 Configuring Parameter SWEEPS sss ee eee 167 5 7 Analyzing Results rennen tiennent ia niin radi a nnam EEAS ETAS SNEEN 171 5 7 1 Configuring Traces eterne voca Fd n de dr adea E v eir daa 171 5 7 2 Using Marke Secci i cd dec a i ev d 173 5 7 3 Configuring Numerical Result Display 181 5 7 4 Configuring Result Display Charachertstice eere eee teene eeteettenesnersrrnsnne 182 5 7 5 Scaling the RE en 186 5 7 6 Managing Measurement Data sesenta eina 191 5 8 Deprecated Remote Commands for Amplifier Measurements 192 List of CUMMINS mE m m 194 j me 202 Starting the Application 1 Welcome to the Amplifier Measurement Application The R amp S FSW K18 is a firmware application that adds functionality to measure the effi ciency of traditional amplifiers and amplifiers that support envelope tracking with the R amp S FSW signal analyzer This user manual contains a description of the functionality that the application pro vides including remote control operation Functions that are not discussed in this manual are the same as in the base unit
76. 2 FETCh POWer CFACtor IN CURRent RESult This command queries the Crest Factor at the DUT input as shown in the Result Sum mary Return values lt CrestFactor gt lt numeric value gt Current Crest Factor Default unit dB Example FETC POW CFAC IN CURR would return e g 10 34 Usage Query only Manual operation See Results to check power characteristcs on page 12 FETCh POWer CFACtor OUT CURRent RESult This command queries the Crest Factor at the DUT output as shown in the Result Summary Return values lt CrestFactor gt lt numeric value gt Current Crest Factor Default unit dB Example FETC POW CFAC CURR would return e g 8 72 Usage Query only Performing Amplifier Measurements Manual operation See Results to check power characteristcs on page 12 FETCh POWer GAIN MAXimum RESult FETCh POWer GAIN MINimum RESult FETCh POWer GAIN CURRent RESult This command queries the signal gain as shown in the Result Summary Return values lt Gain gt lt numeric value gt Minimum maximum or current gain depending on the command syntax Default unit dB Example FETC POW GAIN MAX would return e g 21 37 Usage Query only Manual operation See Results to check power characteristcs on page 12 FETCh POWer INPut MAXimum RESult FETCh POWer INPut MINimum RESult FETCh POWer INPut CURRent RESult This command queries the power at the DUT input as sh
77. 3 INPut EATT STATe lt State gt This command turns the electronic attenuator on and off Parameters lt State gt ON OFF RST OFF Example INP EATT STAT ON Switches the electronic attenuator into the signal path Configuring Amplifier Measurements Manual operation See Using Electronic Attenuation on page 43 INPut IQ FULLscale LEVel lt PeakVoltage gt This command defines the peak voltage to be displayed in the diagram The range of the power scale is then defined by lt PeakVoltage gt to lt PeakVoltage gt Parameters lt PeakVoltage gt Peak voltage level RST 1Vp Example INP IQ FULL 3V Selects a peak voltage of 3 V Manual operation See Full Scale Level on page 41 INPut GAIN VALue Gain This command selects the gain level if the preamplifier is activated INP GAIN STAT ON see INPut GAIN STATe on page 141 The command requires the additional preamplifier hardware option Parameters lt Gain gt 15 dB 30 dB The availability of gain levels depends on the model of the R amp S FSW R amp S FSW8 13 15dB and 30 dB R amp S FSW26 or higher 30 dB All other values are rounded to the nearest of these two RST OFF Example INP GAIN VAL 30 Switches on 30 dB preamplification Usage SCPI confirmed Manual operation See Preamplifier on page 42 INPut GAIN STATe lt State gt This command turns the preamplifier on and off It requires the optional preamplifier ha
78. 7 FETCh MACCuracy REVM CURRent RESU eerte rtt erret ENEE 108 Da ahaa RANA RUM 108 FETCh MACCuracy RMEV CURRent RESult 108 FETCh MACCuracy RMEV MAXimum RESUIt essent 108 FETCh MACCuracy RMEV MINimum RESult 2 1 rennen rn tnter n nn een 108 FETCh MACCuracy SRERror CURRent RESult 1 5 traer rati ror in tent rn thanh 109 FETCh MACCuracy SRERror MAXimum RESUIt eese nennen 109 FETCh MACCuracy SRERror MINimum RESult 2 neon rnt rnnt n etn nane 109 FETCh MACCuracy RESUIt ALL IN en ele ei e elek Ke BE RE 110 FETCRh POWer CFACtor OUT CURRentERESult trt rn rre rn eren rte 110 FETCh POWeFGAIN CURRent RESult 2 5 neret aiaia erre crore rr RE 111 e ken ele ET Mu il RE 111 FETCh POWer GAIN MINimutm RESUM Zsira ter rrt ere trennen 111 FETCh POWer INPut CURRent LE 111 FETCh POWer INPut MAXimum RESUuIt FETCh POWer INPutMINim mp RESult 23 1 rrr rne trt nieri 111 FETCh POWer OUTPutCURRent RESult rrr errat rr erret rrr cr rr Rete rn EE RES 111 FETCH POWerQUTPUEMAKIMUMERES KE 111 FETCh POWer OGUTPutMINimumrg RESult rn rrr tert tret rte 111 FETCh POWer P1DB CURRent RESult 2 rrt etuer er trat re eere dr n ra cire Fus 112
79. 91 hubs a eeh TE 191 MMEMory STOResn TRAQGS EE 192 SYSTemiPRESSECHANnel EXEC Ute iei timet t tn trot icri ea Ee e E a ERR RE Ebo s 90 r sume mc 101 Ree ET D ANA EAE 149 TRACe IQ SRATe 149 TRAC SHOES RRA TS AO Ee 149 Ree ERT e irren tiet ir d cies aati ears 150 dE ell KEE 150 IS IMP oCT 102 TRAGesnspEDATA TY snnt rtr er ev ett retten veia gd e eu n dl erate 103 ase arb pfe 102 Index A Aborting op 26 27 AC DC coupling uoi reti eee dnas 35 42 ACP el ue ULT 63 Ice EE 13 Adjacent channel power SEE ACE S 13 Adjacent Channel S seiere sne 64 AM AM ene 14 57 Model ge M 55 AM PM esaia tee Ree danken sa 1957 Configuration of result display s 74 Meo e 55 Amplitude Droopi spegne rnnt oen es e n aon 54 Analog baseband EE 37 Analog Baseband MPAT eege Analysis bandwidth ARB arbitrary waveform Attenuation AUO ii eect EE Electronic Maal e OPUN em TNN err corner rec rrer re Trees Automatic Analysis bandwidth Capture time Bandwidth Analysis e rre tetra percent eo i ea Reference signal m Baseband Capture cemere or
80. ACtor MAXimum Y RESult FETCh PTABle CFACtor MAXimum RESult FETCh PTABle CFACtor MINimum X RESult FETCh PTABle CFACtor MINimum Y RESult FETCh PTABle CFACtor MINimum RESult These commands query the result values for the Crest Factor result as shown in the Parameter Sweep Table Return values lt Results gt lt numeric value gt For RESult Minimum or maximum result that has been measured For X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTing User Manual 1176 9893 02 03 122 Performing Amplifier Measurements Example FETC PTAB CFAC MIN would return e g 0 053 DB Usage Query only FETCh PTABle EVM MAXimum X RESult FETCh PTABle EVM MAXimum Y RESult FETCh PTABle EVM MAXimum RESult FETCh PTABle EVM MINimum X RESult FETCh PTABle EVM MINimum Y RESult FETCh PTABle EVM MINimum RESult These commands query the result values for the EVM result as shown in the Parame ter Sweep Table Return values lt Results gt lt numeric value gt e For RESult Minimum or maximum result that has been measured For X
81. C 2iio etcetera mak er ku 104 Retrieving Powel else 109 Retrieving Baseband Characteristics AAA 113 Retrieving All Results FEICHhMAGCGuracypRESuUll TR EE 104 FETCh MACCuracy RESult ALL This command queries all numerical results shown in the Result Summary Return values Results numerical value Results as a comma separated list The order of results is the same as in the result summary lt RawEVMMin gt RawEVMCurrent lt RawEVMMax gt lt RawModelEVMMin gt lt RawModelEVMCurrent gt lt RawModelEVMMax gt The unit depends on the result If a result hasn t been calculated the command returns NAN Example FETC MACC ALL would return e g 0 277 0 277 0 277 0 002 0 245 0 922 5 Usage Query only Retrieving the Modulation Accuracy FETCh MACOCuracy FERRor MAXimum RESUIt eese 105 FEICh MAGCCuracy FERRorMIBImmUum RESull acturus de rennes 105 FETCh MACCuracy FERRor CURRent RESult eceeeeece eiiis einen nnns 105 Performing Amplifier Measurements FE TChM ACCuracv GlMalance MAximumt RESuI eene 106 FE TChM ACCuracv GlMalance MiNimumf RE Gul 106 FE TChM ACCuracv GlMalance CLpRbent RE Su 106 FETCh MACOCuracy IQIMbalance MAXimum RESUIt csse 106 FETCh MACOuracy IQIMbalance MINimum RESult cesse 106 FETCh MACOCuracy IQlMbalance CURRent RESu
82. EDS would return e g GRE Usage Query only Manual operation See Center Frequency on page 46 CONFigure GENerator FREQuency CENTer SYNC STATe State This command turns synchronization of the analyzer and generator frequency on and off Parameters State ON OFF Example CONF GEN FREQ CENT SYNC ON Synchronizes the analyzer and generator frequency when you change it Manual operation See Attach to R amp S FSW Frequency on page 46 CONFigure GENerator IPConnection ADDRess lt IPAddress gt This command defines the IP address of the connected signal generator Parameters PAddress Example Manual operation Configuring Amplifier Measurements String containing the IP address CONF GEN IPC ADDR 192 0 2 0 Connects the generator with the stated IP address See Generator IP Address on page 45 CONFigure GENerator IPConnection LEDState This command queries the state of connection to the signal generator Return values State Example Usage Manual operation GREen Connection was successful GREY Unknown connection state RED Connection was not successful CONF GEN IPC LEDS would return e g RED Query only See Generator IP Address on page 45 CONFigure GENerator POWer LEVel Level This command defines the signal generator RMS level Parameters Level Example Manual operation numeric value Default uni
83. ENerator FREQuency CENTer LEDState on page 143 Path RF BB Selects the RF signal path of the generator that should be used for signal generation Note that the baseband path which is required for envelope tracking measurements is always the same as the RF path Remote command RF path CONFigure GENerator TARGe BB path CONFigure GENerator TARGe PATH RF on page 147 PATH BB on page 146 CT CT Selecting a segment in a multi segment waveform file If you are using a waveform file that contains several different waveforms you have to select the segment that should be transferred to the signal generator Triggering Measurements Note that the segment that you have selected in the Generator Setup has to match the segment selected for the reference signal regarding the signal characteristics Remote command CONFigure GENerator SEGMent on page 145 CONFigure GENerator SEGMent LEDState on page 146 3 5 Triggering Measurements The R amp S FSW K18 provides functionality to perform triggered measurements The Trigger dialog box contains settings to configure triggered measurements The following trigger sources are supported Free Run e External e UO Power e IF Power e RF Power gt To access the trigger settings proceed as follows e Inthe Configuration Overview select the Trigger button e Press the TRIG key and then select the Trigger Config softkey The functionality to
84. ETC POW P2DB CURR would return e g 8 193 Usage Query only Manual operation See Results to check power characteristcs on page 12 FETCh POWer P3DB CURRent RESult This command queries the 3 dB Compression Point as shown in the Result Summary Performing Amplifier Measurements Return values Level numeric value Current 3 dB Compression Point Default unit dBm Example FETC POW P3DB CURR would return e g Zool Usage Query only Manual operation See Results to check power characteristcs on page 12 Retrieving Baseband Characteristics FETCh APAE E ginn Le RE 113 FETCh APAE MINim m RESUlt 2 oppi epp eite nari rea pagecdee etra ENER EEN aaraa 113 a e e RI RE 113 FETCh BBPower MAXimum RESult cicer oed aa ecc ica de 114 FETOCh BBPowerMINImutmm RESUul 9 eterno a tera ru enr s Pa eoe edo de enano d rena ue SCENE 114 FETCh BBPower CURRent RESult eeeeseeseeiee ecciesie ect tentant aba nnn naa iaiia 114 FETGChUICC MAXImulmb AT RE 114 FETGIIGOC MINIBum E 114 EETGhICOIXOUBRRenI RESU E 114 FETChilVObtage PURE MAXimum RESult eraat eene eae tette eene 114 FETChilVOEtage PURE MINim mp RESult 2 2 21 22 teens enna ocu v ov ca EEN 114 FETChiIVObtage PURE GURRent RESUult 22 nite re het reote en tet RAAE 114 FE TChOVOLtzoe PURE MAXimumt RE Su 115 FETCh QVOLtage PURE MINImump RESU acciones ce trad EEN EENS 115 rETCh QVObtage
85. For a list of available channel types see INSTrument LIST on page 88 Selecting the Application lt ChannelName gt String containing the name of the channel The channel name is displayed as the tab label for the measurement channel Note If the specified name for a new channel already exists the default name extended by a sequential number is used for the new channel see INSTrument LIST on page 88 Example INST CRE IQ IQAnalyzer2 Adds an additional UO Analyzer channel named IQAnalyzer2 INSTrument DELete lt ChannelName gt This command deletes a measurement channel If you delete the last measurement channel the default Spectrum channel is activa ted Parameters lt ChannelName gt String containing the name of the channel you want to delete A measurement channel must exist in order to be able delete it Example INST DEL IQAnalyzer4 Deletes the channel with the name IQAnalyzer4 Usage Event INSTrument LIST This command queries all active measurement channels This is useful in order to obtain the names of the existing measurement channels which are required in order to replace or delete the channels Return values lt ChannelType gt For each channel the command returns the channel type and lt ChannelName gt channel name see tables below Tip to change the channel name use the INSTrument REName command Example INST LIST Result for 3 measurement channels ADEM Analog
86. LC DELT2 Y Outputs measurement value of delta marker 2 Usage Query only CALCulate lt n gt MARKer lt m gt AOFF This command turns all markers off Example CALC MARK AOFF Switches off all markers Usage Event Manual operation See All Markers Off on page 72 CALCulate lt n gt MARKer lt m gt STATe State This command turns markers on and off If the corresponding marker number is cur rently active as a deltamarker it is turned into a normal marker Parameters lt State gt ON OFF RST OFF Example CALC MARK3 ON Switches on marker 3 Manual operation See Marker State on page 71 See Marker Type on page 71 CALCulate lt n gt MARKer lt m gt TRACe lt Trace gt This command selects the trace the marker is positioned on Note that the corresponding trace must have a trace mode other than Blank Analyzing Results If necessary the command activates the marker first Parameters Trace 1to4 Trace number the marker is assigned to Example CALC MARK3 TRAC 2 Assigns marker 3 to trace 2 Manual operation See Assigning the Marker to a Trace on page 72 CALCulate lt n gt MARKer lt m gt X Position This command moves a marker to a particular coordinate on the x axis If necessary the command activates the marker If the marker has been used as a delta marker the command turns it into a normal marker Parameters Position Numeric value that defines the mar
87. NDow n TRACe t Y SCALe MINimum on page 189 Reference value DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RVALue on page 190 Position DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RPOSition on page 189 Distance DISPlay WINDow n TRACe t Y SCALe PDIVision on page 189 Overview of Remote Command Suffixes 5 Remote Control Commands for Amplifier Measurements The following remote control commands are required to configure and perform ampli fier measurements in a remote environment The R amp S FSW must already be set up for remote operation in a network as described in the base unit manual d Universal functionality Note that basic tasks that are also performed in the base unit in the same way are not described here For a description of such tasks see the R amp S FSW User Manual In particular this includes 5 1 e Managing Settings and Results i e storing and loading settings and result data e Basic instrument configuration e g checking the system configuration customizing the screen layout or configuring networks and remote operation Using the common status registers specific status registers for Pulse measure ments are not used e Overview of Remote Command Suffixes cccccccccceeeeeeeeeeeeececeeeeeeeeeeeeeseeeeenaees 81 Cy ele DEE 82 Selecting ae eeler Le EE 86 e Configuring the Screen Layout E 90 e Performing Amplifier Measurements nnne 98 C
88. OS LEDState on page 130 Clock Rate Designing a reference signal within the R amp S FSW K18 Defines the clock or sample rate that the reference signal is generated with The purpose of the application is to measure nonlinear effects These generate spec tral regrowth amplitude components in addition to the signal Remote command CONFigure REFSignal GOS SRATe on page 132 Signal Bandwidth Designing a reference signal within the R amp S FSW K18 Defines the bandwidth of the reference signal Designing a Reference Signal The bandwidth should not be larger than maximum UO bandwidth supported by your signal analyzer which depends on the analyzer configuration Remote command CONFigure REFSignal GOS BWIDth on page 130 Signal Length Designing a reference signal within the R amp S FSW K18 Defines the number of samples that the reference signal consists of A number that is a power of 2 will speed up the internal signal processing Thus such a number should be specified if no other requirements limit the choice of the sample count For more information see Pulse Duty Cycle on page 33 Remote command CONFigure REFSignal GOS SLENgth on page 132 Crest Factor Designing a reference signal within the R amp S FSW K18 Defines the crest factor of the reference signal The crest factor shows the RMS power in relation to the peak power Remote command CONFigure REFSignal GOS CRESt on page 130
89. POIiRIS atten opener rhe tpe rea etr tn pee n tenni RR ER de Eon GONFigure MODeling SEQUuernce 2 2 nr e ttr ennt n karten rn Ee EE Y E E Eras CONFigure MODeling STATe CONFigure PAE ICHannel MULTIplier 2 ntt prr n rre eh rn rere ene re dates GONFigure PAE ICHannel OFFSet tra rtr AEE preci aee Era reote Rae cia ce GONFigure PAE ICFIapnmeb IRESISIOL eegene geegent Eege ENOTE GONFigure PAE QCHanneElMULTiplier entr pen tnt rnt er ner tnr rrr tun GONFigure PAE QCHarnnelOFESGt inrer orit throni ner re thea REY ra Ero Ern FE UR RR ER EX EE ene eas GONFigure POWer RESult PSDB REFSrerce cuio rper oet rt teen eret patre urge eoa EEEE E PROS XC KE 166 CONFigure POWer RESult P3DB STATe GONFigure POWer RESult PONLy STATe 5 corni rtr ehe th na ra rant trennen thence 166 GONFigure PSWeep ADJust EEVel STAT seniper reae reor p enter cance oorr cope 167 GONFigure PSWeep EXPected GAIN tre torret tr eer rrr erred e e XR XR eden 167 CONFigure PSWeep X SETTing i CONFIgUre EN KT T gg e e UO RECH NEE GONFigure PSWeep X S TODB an ttn ner rr tetra erii Y ie FER RR X FERE eR a ERE Ern NEV CONFigure PSWeep Y SETTing GONFigure PSWeep Y S VARE uttter terre erre recen rr era y i n e e Pe A EE ele PSWEEp ECH KK 170 CONFigure PSWeep Y STEP D CONFig re PSWeep de EEN 171 EE ee EE 183 GONFigure PSWeeb ESTATe eiitn tnter rre tr rere pre ere rrt ten ar a ER E
90. POSition eeseesesssseeeeeeeeee nennen 189 DISPlay WINDow n TRACe st Y SCALe RVALue esses nennen nennen nennen nne 190 DISPlay WINDow n TRACe t Y SCALe UNIT essen nnne nennen rennen nnne 190 FETCh AMAM CWIDth CURRent RESUIt 1 aot etre reno hn cer rti ba E DR Rennen ed 109 FETCh AMPM CWIDth CURRent RESult FETCh APAE CURRent RESUlt rrr rrr rh a aai ii PA dp P Exe e tan 113 FETGIEAPAE MAXim tmpBRESUItG 5 coat cv tco nee tune ertet evecta AE te ra bare 113 FEIER Ee E Dese 113 FETCh BBPower CURRent RESUlt tet or rete n sted er te ee eet v ra 114 FETGCh BBPower MAXimuml RESUIt o her rct eret ere ri eene rr ra erect ras 114 FETCH BBPOWerMINIMUM ZERESUIU 28 oi sccacsscemasarecconceyess oett an onore eso peu eoe veas SE qM Eed 114 FETCh GG CURERent RESult 2 nn rnit err rtp hen t ree eh n erp ern tn rtp rne 114 FETGCh IGC MAXImumL TIRESult EE 114 FETCH ICG MINIMUM RESU E 114 FETCh IVOLtage PURE GURRent RESult rrt net trn rene tern tn rrr ences 114 FETCh IVOLtage PURE MAXimum RESult ij FETChlVOLbtage PURE MINim m RESUlt ss coorta etr to aee tr ein Hoe rg ite paene tpe xe ke ev etr e FETCh MACCuracy FERRor CURRent RESUlt trennt ner enne eie 105 FETCh MACCuracy FERRor MAXimum RESuUlt eese nennen enne 105 FE
91. Protecting Data Using the Secure User Mode in the Data Manage ment section of the R amp S FSW User Manual Deprecated Remote Commands for Amplifier Measurements Suffix n 1 n irrelevant Setting parameters Number Always 1 lt FileName gt String containing the path and file name The file type is iq tar Example MMEM STOR IQ COMM A sensible comment MMEM STOR IQ STAT 1 C IQData Amplfier iq tar Saves the I Q data to the specified file and adds a sensible com ment Usage Setting only MMEMory STORe lt n gt TRACe Trace lt FileName gt This command stores current trace data in a file Suffix lt n gt 1 n irrelevant Setting parameters Trace Number of the trace you want to save Note that the available number of traces depends on the selected result display Range 1 to 6 lt FileName gt String containing the path and file name Example MMEM STOR TRAC 2 C AmplifierTrace Saves the second trace in the specified directory Usage Setting only 5 8 Deprecated Remote Commands for Amplifier Mea surements Following is a list of deprecated remote commands The remote commands are still supported to maintain compatibility to previous versions of amplifier measurements but it is strongly recommended to use the command system in the way it is meant to be used in the latest version of the R amp S FSW K18 Legacy command Replaced by Comment CONFigure DPD MOD
92. Q CENT UP Sets the center frequency to 110 MHz Usage SCPI confirmed 5 6 4 Configuring Amplifier Measurements Manual operation See Center Frequency on page 39 SENSe FREQuency CENTer STEP lt StepSize gt This command defines the center frequency step size Parameters lt StepSize gt fmax iS specified in the data sheet Range 1 to fMAX RST 0 1 x span Default unit Hz Example FREQ CENT 100 MHz FREQ CENT STEP 10 MHz FREQ CENT UP Sets the center frequency to 110 MHz Manual operation See Center Frequency Stepsize on page 39 SENSe FREQuency OFFSet lt Offset gt This command defines a frequency offset If this value is not 0 Hz the application assumes that the input signal was frequency shifted outside the application Al results of type frequency will be corrected for this shift numerically by the application Parameters Offset Range 100 GHz to 100 GHz RST 0 Hz Example FREQ OFFS 1GHZ Usage SCPI confirmed Manual operation See Frequency Offset on page 39 Defining Level Characteristics DiSblavlfWiNDow nzTR ACectlSCALelRLEVel rnrn rn nrnnn nne 139 DiSblavlfWiNDow nzTR ACectzvlSCALelbRlEVelOEtzGet 139 INPUBAT Trato EE 139 INPuEATTernuationAU e E 139 UPN gts LE cm 140 Jl EA TT AUTO 140 INEORESET EE 140 INPubtIQ FULEScale LEV EN 141 lc Imag
93. R amp S9FSW K18 Power Amplifier and Envelope Tracking Measurements User Manual 005 E Spectrum FFT T Gel 49 951172 MHz 750 0 dBm 2h 3 Ref 6 AM pM 126 32 ys 1176 9893 02 03 ROHDE amp SCHWARZ Test amp Measurement User Manual This manual describes the following R amp S FSW applications R amp S FSW K18 1325 2170 K02 The firmware of the instrument makes use of several valuable open source software packages For information see the Open Source Acknowledgement on the user documentation CD ROM included in delivery Rohde amp Schwarz would like to thank the open source community for their valuable contribution to embedded computing 2015 Rohde amp Schwarz GmbH amp Co KG M hldorfstr 15 81671 M nchen Germany Phone 49 89 41 29 0 Fax 49 89 41 29 12 164 E mail info rohde schwarz com Internet www rohde schwarz com Subject to change Data without tolerance limits is not binding R amp S is a registered trademark of Rohde amp Schwarz GmbH amp Co KG Trade names are trademarks of the owners The following abbreviations are used throughout this manual R amp S9FSW K18 is abbreviated as R amp S FSW K18 1 1 1 2 3 1 3 2 3 3 3 4 3 4 1 3 4 2 3 4 3 3 4 4 3 4 5 3 4 6 3 5 3 6 3 7 3 8 3 9 3 10 3 11 3 12 3 13 3 14 3 15 4 1 4 1 1 4 1 2 Contents Welcome to the Amplifier Measurement Application 7 Starting the ApplicatiOn
94. RACe IQ SRATe AUTO State This command turns automatic selection of an appropriate capture sample rate on and off When you turn this feature on the application calculates an appropriate sample rate based on the reference signal and adjusts the other data acquisition settings accord ingly Configuring Amplifier Measurements Parameters State ON OFF RST ON Example TRAC IQ SRAT AUTO ON Selects automatic adjustment of the sample rate Manual operation See Configuring the measurement bandwidth on page 48 TRACe IQ WBANd MBWidth Bandwidth This command selects the largest possible bandwidth that can be applied for the wide band signal path The wideband signal path is available with the corresponding bandwidth extensions available for the R amp S FSW for example R amp S FSW B160 The command is available when you turn on TRACe T0 WBANd STATe Parameters Bandwidth 80MHZ Restricts the bandwidth to 80 MHz The wideband signal path is not used in that case TRACe 10 WBANd STATe is turned off 160MHZ 320MHZ 500MHZ Restricts the bandwidth to the corresponding value even if you have installed a higher bandwidth extension Default unit Hz Example TRAC IQ WBAN ON TRAC IQ WBAN MBW 160MHZ Restricts the bandwidth to 160 MHz Manual operation See Configuring the measurement bandwidth on page 48 TRACe IQ WBANG STATe State This command turns the wideband signal path on and o
95. REG an 111 FEPIChiPOWerdNPut MAXIm mp RE SUG sc cerrada oct reta ttt etre set ecens 111 FETCh POWer INPut MINimumpRESUlt sisirin enri eee oido kou cci neret 111 FETGhPOWerINPut GURRenI RESUM r i recreo ESO 111 FETCh POWer OUTPutMAXImum RESulE trio ort etat rrt ette 111 FEICh IPOWer OUTPut MINimumpRESUlt 2 2 2 reote ee coda cine 111 FETGHPOWernOUTPUEGURREMPRESUIE EE 111 FETCHIPOWeE PTADB CURRBSnt RESUlf Q Lir ic teen aai aa a eto ne zh pue da 112 FETChPOWetP2DB ICURRenIERESUII i oorr orante Deme tex cnr aa eee 112 EETCh POWer P3DB CURRentERESUIE 2 1252222 131222022 rores Doce ease se Crear EEN 112 FETCh AMAM CWIDth CURRent RESult This command queries the AM AM Curve Width as shown in the Result Summary Return values lt CurveWidth gt lt numeric value gt Current AM AM Curve Width Default unit dB Example FETC AMAM CWID CURR would return e g 0 69 Usage Query only Performing Amplifier Measurements Manual operation See Results to check power characteristcs on page 12 FETCh AMPM CWIDth CURRent RESult This command queries the AM PM Curve Width as shown in the Result Summary Return values lt CurveWidth gt lt numeric value gt Current AM PM Curve Width Default unit degree Example FETC AMPM CWID CURR would return e g 1 441 Usage Query only Manual operation See Results to check power characteristcs on page 1
96. RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTing Example FETC PTAB EVM MAX Y would return e g if the y axis represents the output power 0 DBM Usage Query only FETCh PTABle GAIN MAXimum X RESult FETCh PTABle GAIN MAXimum Y RESult FETCh PTABle GAIN MAXimum RESult FETCh PTABle GAIN MINimum X RESult FETCh PTABle GAIN MINimum Y RESult FETCh PTABle GAIN MINimum RESult These commands query the result values for the Gain result as shown in the Parame ter Sweep Table Performing Amplifier Measurements Return values Results numeric value For RESult Minimum or maximum result that has been measured For X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTing
97. RF input signal You can use a preamplifier to analyze signals from DUTs with low input power For R amp S FSW 26 or higher models the input signal is amplified by 30 dB if the pream plifier is activated For R amp S FSW 8 or 13 models the following settings are available Off Deactivates the preamplifier 15 dB The RF input signal is amplified by about 15 dB 30 dB The RF input signal is amplified by about 30 dB Remote command INPut GAIN STATe on page 141 INPut GAIN VALue on page 141 Input Coupling The RF input of the R amp S FSW can be coupled by alternating current AC or direct cur rent DC AC coupling blocks any DC voltage from the input signal This is the default setting to prevent damage to the instrument Very low frequencies in the input signal may be dis torted However some specifications require DC coupling In this case you must protect the instrument from damaging DC input voltages manually For details refer to the data sheet Remote command INPut COUPling on page 135 Impedance For some measurements the reference impedance for the measured levels of the R amp S FSW can be set to 50 Q or 75 0 75 Q should be selected if the 50 Q input impedance is transformed to a higher impe dance using a 75 Q adapter of the RAZ type 25 Q in series to the input impedance of the instrument The correction value in this case is 1 76 dB 10 log 750 500 Remote command INPut IMPedance on page 136
98. RR 168 GONFigure REFSignal CGW LEDState irr rrr tentari eere reina o ERR 127 tere lee EE CGW READ CONFigure REF Signal e Klee CONFigure REFSignal CWF ETGenerator STATe CONFIg re Ee e eeler 129 CONFig re REF Signall CWE TT ME EE le Ee Ee E RE CONFigure REFSignal GOS CREJSE ertet ttc Pe re pg ec d te ner reed CONFigur REFSignaliGOS DCY de CONFigure REFSignal GOS LEDState GONFigure REFSignal GOS NPONSILIOR EEN GONFigure REFSigrial GOS NWI DIFi s ote etie ea nerd eb a EAE AATE CONFig re e EE Ee Te EEN CONFigure REFSignal GOS SLEENGI oie cece eee AE EA EEN ore lue GONFigure REFSignal GOS SIRA WEE CONFigure Ee Ee LE CONFig re REF Signal ee A KE EE e e UE ee TIR EE EE CONFigure e ET RE Ge OR 133 CONFigure REFSignal SINFOo SRATG erer centri attt etr rege eI d d Puce x OR dd 133 CONFigure SIGNal ERRor COMPensation ADRoop STATe CONFigure SIGNal ERRor COMPensation F OFFset STATe essen CONFigure SIGNal ERRor COMPensation IQIMbalance STATe essen 155 CONFigure SIGNal ERRor COMPensation IQOFfset STATe seen CONFigure SIGNal ERRor COMPensation SRATe STATe esee nenne CONFigure SIGNal ERRor ESTimation ADRoop STATe essent CONFigure SIGNal ERRor ESTimation FOFF set STATE nennen CONFigure SIGNal ERRor ESTimation IQIMbalance STATe CONFigure SIGNal
99. T on page 178 Search Minimum Sets the selected marker delta marker to the minimum of the trace If no marker is active marker 1 is activated Remote command CALCulate n MARKer m MINimum PEAK on page 180 CALCulate n DELTamarker m MINimum PEAK on page 179 Search Next Minimum Sets the selected marker delta marker to the next higher minimum of the selected trace If no marker is active marker 1 is activated Remote command CALCulate n MARKer m MINimum NEXT on page 180 CALCulate n DELTamarker m MINimum NEXT on page 179 4 3 Customizing Numerical Result Tables The R amp S FSW K18 allows you to customize the contents of the Result Summary and the Parameter Sweep Table By default the application shows all supported numerical results in the result tables Result Summary and Parameter Sweep Table However you can add or remove results as you like gt To access the table configuration proceed as follows e Inthe Configuration Overview select the Result Configuration button and then the Table Config tab 4 4 Configuring Result Display Characteristics Table Config Mod Acc Power In dBm O Power Power Out dBm O i Voltage Current Gain dB Crest Factor In dB Crest Factor Out AM AM Curve Width AM PM Curve Width Accessing the Table Config tab Note that the Table Config tab is only available after you have selected the Specifics for Res
100. TARt CONFigure ESTimation STOP RST ON Example CONF EST FULL OFF CONF EST STAR Os CONF EST STOP 20us Defines a synchronization range over the first 20 us of the cap ture buffer Manual operation See Defining the estimation range on page 52 CONFigure ESTimation STARt Start This command defines the start value of the estimation range Parameters Start numeric value Default unit s Example See CONFigure ESTimation FULL Manual operation See Defining the estimation range on page 52 CONFigure ESTimation STOP Stop This command defines the end value of the estimation range Parameters Stop Example Manual operation Configuring Amplifier Measurements numeric value Default unit s See CONFigure ESTimation FULL See Defining the estimation range on page 52 CONFigure SYNC CONFidence Confidence This command defines the synhronization confidence level Parameters Confidence Example Manual operation numeric value Range 0 to 100 Default unit PCT CONF SYNC CONF 99 Defines a confidence level of 99 96 See Defining a synchronization confidence level on page 52 CONFigure SYNC DOMain Domain This command selects the synchronization method Parameters Domain Example Manual operation IQDirect UO data for the reference signal is directly correlated with the reference and measured
101. TCh MACGuracy F ERRor MlNim m RESUIt usnnurrta uen oa ern pon ture ntn eat th ng Fee rere 105 FETCh MACCuracy GIMBalance CURRent RE Gu 106 FETCh MACCuracy GIMBalance MAXimum RESuUlt sees 106 FETCh MACCuracy GIMBalance MINimum RESult sss FETCh MACCuracy IQIMbalance CURRent RESult eese rennen 106 FETCh MACCuracy IQIMbalance MAXimum RESuIt eese een nnns 106 FETCh MACCuracy IQIMbalance MINimum RESult eese 106 FETCh MACCuracy IQOFfset CURRent RESult rrt rtr trt n nnne neta 106 FETCh MACCuracy IQOFfset MAXimum RESUIt essent 106 FETCh MACCuracy IQOFfset MINimum RESuUlt seen nennen nennen 106 FETCh MACCuracy MERRor MAXimum RESult 2 ttn tn rhetor eerte 107 FETICh MACCGuracy MERRorMINimumf RESult rcnt o rd re parent eerte gena 107 FETCh MACCuracy PERRor GURRent RESult ren ttn tttm mn trennen 107 FETCh MACCuracy PERRor MAXimum RESult FETCh MACCuracy PERRor MINimum RESult essere nennen 107 FETCh MACCuracy QERRor CURRent RESult rrt rnt eri t ern een Edna 107 FETCh MACCuracy QERRor MAXimumy RESUIt 51 aeta t ttt nnn three ups 107 FETCh MACCuracy QERROGMINIMUMPRESUIE dcsscsacerccacesssrscencercenesmcasberscencencentepcsseasssacguveevceneantuanerodavesdes 10
102. UO data The application allows you to adjust both values automatically or manually Automatic adjustment When you select automatic adjustment of sample rate and measurement bandwidth the application selects a bandwidth that is appropriate for the characteristics of the ref erence signal and adjusts the sample rate accordingly For more information about the reference signal see chapter 3 3 Designing a Refer ence Signal on page 27 Manual definition When you define the sample rate and measurement bandwidth manually you can select values that you are comfortable with Because the bandwidth is a function of the sample rate and vice versa the application adjusts the values when you change either setting The following dependencies apply When you change the sample rate the application updates the bandwidth accord ingly and vice versa It also adjusts the capture length to the new values The capture time remains the same When you change the capture time or capture length the sample rate and band width remain the same Maximum bandwidth The maximum bandwidth you can use depends on your hardware configuration The following bandwidth extensions are available for the R amp S FSW 160 MHz 320 MHz 500 MHz Configuring the Data Capture By default the application automatically determines the maximum bandwidth When you select a maximum bandwidth other than Auto the bandwidth is restricted to that value When yo
103. UT output DEE ee rr ert GRE 62 Configuring compression point Calculaton 62 Evaluating only the DUT output power In case you are only interested in the output power of the amplifier the application allows you to turn off the calculation of all results except the output power Doing this has the advantage of speeding up the measurement considerably When you turn on the Calculate Output Power Only feature the application only cal culates the output power of the amplifier All other results numerical or graphical are not available in that case Remote command CONFigure POWer RESult PONLy STATe on page 166 Configuring compression point calculation The application evaluates three compression points The compression points represent the input power where the gain of the amplifier deviates by a certain amount from a reference point on the gain curve 1 dB 2 dB and 3 dB Because these compression points are relative values you have to define the refer ence gain There are two ways to get the reference gain automatically or manually In case of manual specification of the reference gain the reference point is the gain at a certain input power which you can define in the Reference Input Power input field In case of automatic calculation of the reference gain the reference gain is the aver age gain that has been measured the average gain is a result shown in the Numeric Result Summary Remote command Method CONFig
104. WINDow command Parameters lt WindowName gt lt Direction gt lt WindowType gt Return values lt NewWindowName gt Example Usage Manual operation Configuring the Screen Layout String containing the name of the existing window the new win dow is inserted next to By default the name of a window is the same as its index To determine the name and index of all active windows use the LAYout CATalog WINDow query LEFT RIGHt ABOVe BELow Direction the new window is added relative to the existing win dow text value Type of result display evaluation method you want to add See the table below for available parameter values When adding a new window the command returns its name by default the same as its number as a result LAY ADD 1 LEFT MTAB Result 2 Adds a new window named 2 with a marker table to the left of window 1 Query only See Numeric Result Summary on page 10 See AM AM on page 14 See AM PM on page 15 See Gain Compression on page 16 See Magnitude Capture RF and Q on page 16 See PAE vs Input Power PAE vs Output Power on page 17 See PAE vs Time on page 17 See Power vs Time on page 18 See Raw EVM on page 18 See Error Vector Spectrum on page 19 See Spectrum FFT on page 20 See Time Domain on page 20 See Vcc vs Icc on page 22 Table 5 2 lt WindowType gt parameter values for Amplifier Measurement application
105. X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTing FETC PTAB AMAM CWID MAX X would return e g if the x axis represents the RF to envelope delay 0 000001 s Query only FETCh PTABle AMPM CWIDth MAXimum X RESult FETCh PTABle AMPM CWIDth MAXimum Y RESult FETCh PTABle AMPM CWIDth MAXimum RESult FETCh PTABle AMPM CWIDth MINimum X RESult FETCh PTABle AMPM CWIDth MINimum Y RESult FETCh PTABle AMPM CWIDth MINimum RESult These commands query the result values for the AM PM Curve Width result as shown in the Parameter Sweep Table Return values lt Results gt Example Usage lt numeric value gt For RESult Minimum or maximum result that has been measured For X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y
106. a E eene 82 Boolean values etr ey 85 Gapitalizatlol timet nete tende 83 Character data ictus ideo eiie tetas 86 REI e PEE 86 NUMERIC Valles iride eret rez re oce ites 84 Optional KGyWotds eis eee 83 SE VE E 84 SINGS 86 ISTUD C 83 EE Ee 60 Restoring Channel settings horto etis 25 EE e DE EE 53 Result displays rc n eee 10 ACP table E 13 AMAM Ru 14 AM PM 15 Config latiOti EE 74 Error Vector Spectrum iacit redet 19 Gain Compression nein tede eite etd as 16 Magnitude Capture sssusa siine ditties 16 PAE vs Input POWeF erred ener 17 PAE vs Output POWer eret rts 17 PAE VS TII odori e venitur el eee duod 17 Parameter Sweep A 22 Power vs TIME c c erento de 18 RaWJEVM 5 neret eet 18 Result SUmMMAary eeneg 10 Spectr rmF ET rer retro tret ent 20 Time Domain 20 Ke EE 22 Voltage Vs CUEN E 22 Results FOI CIE T Table configuration RF attenuation Te ME 42 Manual PPS 42 FRE ADU o 35 Connector remote A 134 RMS level eterne a e eet e nee 45 RUN CONT XM ttiaebes 26 RUN SINGLE KGy ite tun ei to c eo do e dime 26 27 S Sample Error E 54 Sample PALS E 8 Reference signal 27 32 el 48 Signal EE 32 Scale PSP m M 7T hfols 78 Sequencer
107. adjacent channels in the measurement Usage Query only Manual operation See Defining characteristics of the adjacent channels on page 64 5 6 14 Configuring Amplifier Measurements SENSe POWer ACHannel BANDwidth ACHannel Bandwidth This command defines the bandwidth of the adjacent channels evaluated in the ACP measurement Parameters Bandwidth numeric value Default unit Hz Example POW ACH BAND ACH 5MHZ Defines a bandwidth of 5 MHz for all adjacent channels Manual operation See Defining characteristics of the adjacent channels on page 64 SENSe POWer ACHannel BANDwidth CHANnel Bandwidth This command defines the bandwidth of the transmission channel evaluated in the ACP measurement Parameters Bandwidth numeric value Default unit Hz Example POW ACH BAND Queries the bandwidth of the transmission channel Manual operation See Defining characteristics of the transmission channel on page 64 SENSe POWer ACHannel SPACing ACHannel lt Bandwidth gt This command defines the channel spacing in ACP measurement Parameters lt Bandwidth gt lt numeric value gt Distance between the center frequency of one channel and the center frequency of the next channel Default unit Hz Example POW ACH SPAC ACH 10MHZ Defines a channel spacing of 10 MHz Manual operation See Defining characteristics of the adjacent channels on page 64 Configuring Power Measurements
108. age 114 Average PAE The average Power Added Efficiency PAE indicates the efficiency of the amplifier The PAE is the ratio of the difference between RF output and input power and the DC power PAE Output Power Input Power DC power FETCh APAE CURRent RESult on page 113 Adjacent Channel Power ACP The ACP result display shows the power characteristics of the transmission Tx chan nel and its neighboring channel s The ACP measurement in the R amp S FSW K18 is an I Q data based measurement Thus its results are calculated by the same UO data as the rest of the results like the EVM Note that the supported channel bandwidth is limited by the UO bandwidth of the analyzer you are using The results are provided in numerical form in a table The table is made up out of two parts one part containing the characteristics of the Tx channel the other those of the neighboring channels The table contains the following information Channel Shows the type of channel e Bandwidth Shows the channel s bandwidth gt More information Offset neighboring channels only Shows the frequeny offset between the center frequency of the adjacent or alter nate channel and the center frequency of the transmission channel gt More infor mation Power Shows the power of the transmission channel or the power of the upper lower neighboring channel Balanced ACP Shows the difference between the lower and upper ad
109. al operation See Results to check the power supply characteristics of the amplifier on page 12 FETCh VCC MAXimum RESult FETCh VCC MINimum RESult FETCh VCC CURRent RESult This command queries the measured baseband voltage V_cc as shown in the Result Summary Return values lt Current gt Minimum maximum or current current depending on the com mand syntax Default unit V Performing Amplifier Measurements Example FETC VCC CURR would return e g 0 4 Usage Query only Manual operation See Results to check the power supply characteristics of the amplifier on page 12 5 5 3 3 Retrieving Results of the Parameter Sweep Table Retrieving the results in the Parameter Sweep Table requires six commands for every result type Example command set to query the EVM results FETCh PTABle EVM MAXimum RESult queries the highest EVM that has been measured FETCh PTABle EVM MAXimum X RESult queries the location on the x axis where the highest EVM has been measured FETCh PTABle EVM MAXimum Y RESult queries the location on the y axis where the highest EVM has been measured FETCh PTABle EVM MINimum RESult queries the lowest EVM that has been measured FETCh PTABle EVM MINimum X RESult queries the location on the x axis where the lowest EVM has been measured FETCh PTABle EVM MINimum Y RESult queries the location on the y axis
110. an configure the signal inputs in the Input Source tab of the Input Output dialog box gt To access the input source settings proceed as follows e Inthe Configuration Overview select the Input Output button and then the Input Source tab 3 4 1 1 Configuring Inputs and Outputs e Press the INPUT OUTPUT key and then select the Input Source Config soft key e Contiguring the RF ue 35 e Configuring the Analog Baseband Input 37 Configuring the RF Input The RF input captures the RF signal that you are measuring It is always on The RF input source characteristics are similar to those available in the Spectrum application For a comprehensive description of these settings please refer to the R amp S FSW User Manual gt Select the RF Input tab vertical from the Input Source dialog box Input Source Frequency Amplitude Output Generator Setup RFInput On off BB Input Input Coupling Analog Impedance Direct Path Off High Pass Filter 1 to 3 GHz OTT YIG Preselector e Input Connector m Input COUP 35 ui ee e 36 Iis m HO 36 High Pass Filter EE EE 36 YIG u pop P e AE E E EA a 36 EES o a MEE 37 Input Coupling The RF input of the R amp S FSW can be coupled by alternating current AC or direct cur rent DC AC coupling blocks any DC voltage from the input signal This is the default setting to prevent damage to the
111. aping e From Table Shapes the DPD function based on a table that contains the correction values required to predistort the signal The calculation of the table is based on the AM AM and AM PM polynomial mod els For more information about the contents and usage of the shaping table please refer to the documentation of the R amp S SMW You can define a file name for the DPD table in the corresponding field From Polynomial Shapes the DPD function based on the polynomial defined for the system model Compared to DPD based on a shaping table this method does not transfer a list with correction values Instead the application transfers the polynomial coefficients of the polynomial function used for the correction For more information see chapter 3 10 Applying System Models on page 55 You can update the DPD shaping on the R amp S SMW comfortably with the Update but ton Remote command Mode CONFigure DPD SHAPing MODE on page 161 Table name CONFigure DPD FNAMe on page 160 Selecting the order of model calculation The application allows you to calculate either the AM AM distortion the AM PM distor tion or both simultaneously You can turn correction of the distortion models on and off in the corresponding fields In case you want to predistort both the AM AM distortion and the AM PM distortion simultaneously you can select the order in which the curves are calculated and applied to the UO signal on the R amp S SMW
112. apply for high accuracy timing To obtain this high timing precision trigger port 1 and port 2 must be connected via the Cable for High Accuracy Timing order number 1325 3777 00 e As trigger port 1 and port 2 are connected via the cable only trigger port 3 can be used to trigger a measurement e Trigger port 2 is configured as output if the high accuracy timing option is active Make sure not to activate this option if you use trigger port 2 in your measurement setup e When you first enable this setting you are prompted to connect the cable for high accuracy timing to trigger ports 1 and 2 If you cancel this prompt the setting remains disabled As soon as you confirm this prompt the cable must be in place the firmware does not check the connection In remote operation the setting is activated without a prompt For more information see the R amp S FSW UO Analyzer and UO Input User Manual Remote command CALibration AIQ HATiming STATe on page 134 Configuring the Frequency The Frequency tab of the Input Output dialog box contains settings to configure frequency characteristics Configuring Inputs and Outputs gt To access the frequency settings proceed as follows e Inthe Configuration Overview select the Input Output button and then the Frequency tab e Press the FREQ key and then select the Frequency Config softkey Input Source Frequency Amplitude Output Generator Setup Frequency Center
113. arker posi tion Analyzing Results Usage Event CALCulate lt n gt DELTamarker lt m gt MINimum LEFT This command moves a delta marker to the next higher minimum value The search includes only measurement values to the right of the current marker posi tion Usage Event CALCulate lt n gt DELTamarker lt m gt MINimum NEXT This command moves a marker to the next higher minimum value Usage Event Manual operation See Search Next Minimum on page 73 CALCulate lt n gt DELTamarker lt m gt MINimum PEAK This command moves a delta marker to the minimum level If the marker is not yet active the command first activates the marker Usage Event Manual operation See Search Minimum on page 73 CALCulate lt n gt DELTamarker lt m gt MINimum RIGHt This command moves a delta marker to the next higher minimum value The search includes only measurement values to the right of the current marker posi tion Usage Event CALCulate lt n gt MARKer lt m gt MAXimum LEFT This command moves a marker to the next lower peak The search includes only measurement values to the left of the current marker posi tion Usage Event CALCulate lt n gt MARKer lt m gt MAXimum NEXT This command moves a marker to the next lower peak Usage Event Manual operation See Search Next Peak on page 73 Analyzing Results CALCulate lt n gt MARKer lt m gt MAXimum PEAK This command moves a marker to the highest level If the ma
114. axis CONFigure PSWeep Y SETTing FETC PTAB AMPM CWID MAX X would return e g if the x axis represents the frequency 150000000 HZ Query only R amp S9FSW K18 Remote Control Commands for Amplifier Measurements pm M M HH HJ H M M eei FETCh PTABle BBPower MAXimum X RESult FETCh PTABle BBPower MAXimum Y RESult FETCh PTABle BBPower MAXimum RESult FETCh PTABle BBPower MINimum X RESult FETCh PTABle BBPower MINimum Y RESult FETCh PTABle BBPower MINimum RESult These commands query the result values for the Baseband Power I cc V cc result as shown in the Parameter Sweep Table Return values Results numeric value For RESult Minimum or maximum result that has been measured For X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTing Example FETC PTAB VCC MIN Y would return e g if the y axis represents the envelope bias 0 10000000149 V Usage Query only FETCh PTABle CFACtor MAXimum X RESult FETCh PTABle CF
115. axis automaticalhy memet 79 Scaling the y axis manuallv sess eene 79 Scaling the y axis automatically By default the application scales the y axis in all diagrams automatically gt Auto ON Automatic scaling tries to obtain the ideal scale for the current measurement results The application adjusts the scale each time the results change You can also force an automatic scaling of the y axis at any time with the Auto Scale Once function When you select this function the application scales the y axis even if the results have not been changed Remote command DISPlay WINDow lt n gt TRACe lt t gt Y SCALe AUTO on page 188 Scaling the y axis manually Settings for manual scaling of the y axis become available when you turn automatic scaling off The application provides two methods to scale the y axis e Scaling according to minimum and maximum values The scale is defined by the values at the lower and upper end of the y axis e Scaling according to reference value The scale is defined relative to the reference value and a constant distance between the grid lines gt per division The distance between grid lines refers to diagrams that are split into 10 divisions Scaling the Y Axis The position of the reference value is arbitrary By default it is at the upper end of the y axis 100 96 Remote command Minimum DISPlay WINDow lt n gt TRACe lt t gt Y SCALe MAXimum on page 188 Maximum DISPlay WI
116. cs displayed in the Time Domain result display all have a differ ent unit Therefore the application provides a feature that normalizes all results to 1 see Configuring the Time Domain result display on page 75 Normalization makes it easier to comapre the timing between the traces By default normalization is on Unnormalized results are displayed in their respective unit In that case however the diagram might be hard to read Remote command Selection LAY ADD TDOM Result query TRACe n DATA on page 102 Vcc vs Icc The Vee vs lec result display shows the supply voltage that has been measured on baseband input Q against the current consumption that has been measured on base band input using a shunt resistor or current probe The x axis shows the voltage V The y axis shows the current A The resulting trace is usually represented by a cloud of values The cloud is based on the recorded samples In case of samples that have the same values and would thus be superimposed colors represent the statistical frequency with which a certain level gain combination occurs in recorded samples Blue pixels represent low statistical fre quencies red pixels high statistical frequencies A color map is provided within the result display Remote command Selection LAY ADD VICC Result query TRACe n DATA on page 102 Parameter Sweep The Parameter Sweep result display is a result display that shows a result
117. cs of the DUT the characteristics of the modeled signal are the same as those of the measured signal minus the noise The modeled signal is represented by a line trace When system modeling has been turned off this trace is not displayed All traces include the digital predistortion when you have turned that feature on Dum uoc ue ewe ee EH User Manual 1176 9893 02 03 15 R amp S FSW K18 Performing Amplifier Measurements 1 Clrw 2 Mod e IdealLine 48 0 dBm 12 0 dBm Remote command Selection LAY ADD AMPM Result query TRACe n DATA on page 102 Gain Compression The Gain Compression result display shows the gain and error effects of the DUT against the DUT input or output power The gain is the ratio of the input and output power of the DUT The x axis shows the levels of all samples of the synchronized measurement signal in dBm You can select the information displayed on the x axis in the Display Settings dialog box The y axis shows the gain in dB The ideal Gain Compression curve would be a straight horizontal line However non linear effects result in a measurement curve that does not follow the ideal curve In addition the curve widens at very low input levels due to noise influence The width of the Gain Compression trace is an indicator of memory effects the larger the width of the trace the more memory effects occur The x axis shows the measured power levels in dBm The y axis shows the
118. d aoreet aa 77 elle hu E ls 78 4 1 Configuring Traces The R amp S FSW K18 provides several tools to configure and evaluate traces Selecting the Trace eu E e MET 69 e Exporting ET 70 4 1 1 Selecting the Trace Information Each result display contains one or several traces specific to the corresponding result type The number of traces available for each result display and the information these traces provide are described in chapter 2 Performing Amplifier Measurements on page 10 Remote command DISPlay WINDow lt n gt TRACe lt t gt MODE on page 171 gt To access the trace configuration proceed as follows Press the TRACE key and select the Trace Config softkey 4 2 4 2 1 Using Markers Traces Trace Data Export Trace Mode C CD D CD Ju Conf Preset All Traces Restoring default traces You can press the Preset All Traces button anytime to restore the default trace con figuration for each result display Exporting Traces The functionality to export traces is the same as in the Spectrum application For more information please refer to the R amp S FSW User Manual Using Markers The R amp S FSW K18 provides four markers in most result displays e Configuring Individual Markers eene 70 e Positioning Markel eene ntn e nnne nnn nenne rennen sns 72 Configuring Individual Markers The functionality to position markers and query their position is similar to the marker
119. d as text e INF NINF Infinity or negative infinity Represents the numeric values 9 9E37 or 9 9E37 e NAN Not a number Represents the numeric value 9 91E37 NAN is returned in case of errors Boolean Boolean parameters represent two states The ON state logically true is represen ted by ON or a numeric value 1 The OFF state logically untrue is represented by OFF or the numeric value 0 Querying boolean parameters When you query boolean parameters the system returns either the value 1 ON or the value 0 OFF Example Setting DISPlay WINDow ZOOM STATe ON Query DISPlay WINDow ZOOM STATe would return 1 5 2 6 3 5 2 6 4 5 2 6 5 5 3 Selecting the Application Character Data Character data follows the syntactic rules of keywords You can enter text using a short or a long form For more information see chapter 5 2 2 Long and Short Form on page 83 Querying text parameters When you query text parameters the system returns its short form Example Setting SENSe BANDwidth RESolution TYPE NORMal Query SENSe BANDwidth RESolution TYPE would return NORM Character Strings Strings are alphanumeric characters They have to be in straight quotation marks You can use a single quotation mark or a double quotation mark Example INSTRument DELete Spectrum Block Data Block data is a format which is suitable for the transmission of large am
120. d parameter controlled by the Parameter Sweep Parameters Setting BIAS Controls the envelope bias DELay Controls the delay between envelope and RF signal FREQuency Controls the frequency POWer Controls the output level Configuring Amplifier Measurements STAT ON SETT FREQ CONF PSW Y STAR 10MHZ CONF PSW Y STOP 100MHZ CONF PSW Y STEP 1MHZ Configure the second parameter with start stop and stepsize values Example CONF PSW CONF PSW Y Y Y Y CONFigure PSWeep Y STARt Start This command defines the start value for the second parameter controlled by the Parameter Sweep Parameters Start numeric value whose unit depends on the parameter type you have selected with CONFigure PSWeep Y SETTing Hz in case of the center frequency dBm in case of the output level s in case of the delay between envelope and RF signal V in case of the envelope bias Default unit UNITS PS Example See CONFigure PSWeep Y SETTing CONFigure PSWeep Y STATe State This command turns the second parameter controlled by the Parameter Sweep on and off Parameters State ON OFF RST ON Example See CONFigure PSWeep Y SETTing CONFigure PSWeep Y STEP lt StepSize gt This command defines the stepsize for the second parameter controlled by the Param eter Sweep Parameters lt StepSize gt lt numeric value gt whose unit depends on the parameter type you have selected wi
121. d vice versa Remote command CONFigure REFSignal GOS RLENgth on page 131 Waveform File Name Designing a reference signal within the R amp S FSW K18 Defines the name of the waveform file that the reference ARB signal configuration is stored in Remote command CONFigure REFSignal GOS WNAMe on page 132 3 4 Configuring Inputs and Outputs e Selecting and Configuring the Input Source 34 e Configuring the Frequency nennen enne nnne nnne snnt 38 s Detining Level Characteristics cette darte etin Dep te aed 40 e Using ee 43 e Configuring OUIDULS reno rere aa ERE ra a ER Nen eR RARE ER EE Re ka SE yeu RR EE 44 e Controlling a Signal Generator 44 3 4 1 Selecting and Configuring the Input Source The R amp S FSW K18 allows you to use the RF input and the Analog Baseband input which is available with option R amp S FSW B71 Simultanous use of the RF input and the Analog Baseband input Compared to other applications available for the R amp S FSW the R amp S FSW K18 allows you to use both the RF input and the Analog Baseband input simultaneously This allows for various specific measurements which require a simultaneous capture of the RF signal of the supply voltage and of the current drawn by an amplifier Such a test setup is for example required to calculate the instantaneous PAE Power Added Efficiency which in turn is of interest for measurements on amplifiers that make use of envelope tracking You c
122. directly correlated with the reference and measured signal The performance of this method will degrade in the presence of a frequency offset between the measured and reference signals e 1 Q Phase Difference Correlation on the phase differentiated I Q data This retains phase change infor mation and can handle a frequency offset but is more sensitive to noise than the I Q Direct method e UO Magnitude Correlation on the magnitude of the UO data with no regard for phase information This method can handle a frequency offset and is less sensitive to noise that the IO Phase Diff method but is only useful with amplitude modulated signals e Trigger It is assumed that the capture is triggered at the start of the reference waveform Only minimal correlation is performed to account for trigger jitter This is the fastest synchronization method Remote command CONFigure SYNC DOMain on page 152 R amp S FSW K18 Configuring Amplifier Measurements Defining a synchronization confidence level The synchronization confidence level Sync Confidence is a percentage that describes how similar or correlated reference and measured signal need to be in order for synchronization to be successful A value of 0 means that synchronization will always be successful even if the signals are not correlated at all However results that rely on a good synchronization like the EVM do contain reasonable values in that case A value of 100 means that t
123. dware or on the captured data or on data processing It is simply a manipulation of the final results in which absolute fre quency values are displayed Thus the x axis of a spectrum display is shifted by a constant offset if it shows absolute frequencies but not if it shows frequencies relative to the signal s center frequency A frequency offset can be used to correct the display of a signal that is slightly distorted by the measurement setup for example The allowed values range from 100 GHz to 100 GHz The default setting is O Hz Remote command SENSe FREQuency OFFSet on page 138 Defining Level Characteristics The Amplitude tab of the Input Output dialog box contains settings to configure the signal level characteristics gt To access the amplitude settings proceed as follows e Inthe Configuration Overview select the Input Output button and then the Amplitude tab e Press the AMPT key and then select the Amplitude Config softkey Input Source Frequency Amplitude Output Generator Setup Reference Level Input Settings Preamplifier KGR 0 0 dBm leita 0 0 dB Input Coupling Impedance ation Electronic Attenuation State SES Mode Manual VOA 10 0 dB 0 0 dB Value The level characteristics are the same as those available in the Spectrum application For a comprehensive description of these settings please refer to the R amp S FSW User Manual Functions available in
124. e ioc cipit etant 87 90 Deleting remote 4 ind e t 88 Duplicating remote 87 Querying remote 88 Renaming EMOTE ui recorte ettet 89 Replacing Femote n erre eret 87 Selecting remote T Measurement time Measurements see Result displays esst ntn 10 Memory effects E Method of synchronization sssseseee 51 ilis ing t o ecc TENE Marker positioning ID i MH Model Cho e 56 Modeling Modulation accuracy 2 6 2 ptu mitad ottenere 11 19 Multis waveforrti files ctore tete cerne 46 N Neighboring channels 2er 13 64 Next MIBIUETE eigent or cte irae coco ee Hr dees e tee 73 Marker positioning sod Next Peak EE Marker positioning sf NOISE 4MOLCIN ee E TES 33 Noise source see R amp S FSW User Manual sess 44 Notch position Notch width Reference signal N tneric results i ener ace ree eee ted O Offset Frequeriey 1n rn mere nnt reet etre andesite 39 Reference level ies seed teretes 41 Options Electronic attenuation netter 43 IGM Pass filter ttr 36 135 Prearmlplifi amp r ert rere ttt 42 Output see R amp S FSW User Manual sess 44 Overview ele UCL E 24 P pic 60 a fe 17 Parameter Sweep Available parameters sssseeeee 67 s ULT 64 Configuration of result display
125. e IQOF UO Offset MERR Magnitude Error P1DB 1 dB Compression Point P2DB 2 dB Compression Point P3DB 3 dB Compression Point PERR Phase Error PINP Power In PMW PM Curve Width POUT Power Out QERR Quadrature Error REVM Raw EVM RMEV Raw Model EVM SRER Sample Rate Error VCC Voltage 5 7 4 Configuring Result Display Characteristics pe Bei EI T M 183 CAL Gulate nP UNITANGLe 2 2 riore e crt ec ctn ento eit eee Peas od AEN eH 183 GONFigure PSWeepu em RESU 221 Edo SERE a E trece ERR Rex ux RE e ERE 183 DISPlay WINDow n TDOMain X SCALe DURation esses 184 DiSblavlfWiNDow nztTDOMain SI SCALetMODE nennen 185 DISPlay WINDow n TDOMain X SCALe OFFSet essen 185 DISPlay WINDow n TDOMain Y SCALe NORMalise S TATe sess 185 Analyzing Results CALCulate lt n gt GAIN X lt ResultType gt This command selects the type of information displayed on x axis in the Gain Com pression result display Suffix lt n gt 1 n Parameters lt ResultType gt PINPut Shows the gain compression against the input level POUTput Shows the gain compression against the output level Example CALC GAIN X PINP Displays the gain against the input level Manual operation See Configuring the Gain Compression Result Display on page 76 CALCulate lt n gt UNIT ANGLe lt Unit gt This command selects the unit that the phase is show
126. e you also have to define the multiplier to take the attenuation of passive probes into account as well as the offset to compensate the DC offset of active probes Note that entering wrong values for these parameters yields invalid measurement results Generally speaking the multiplier multiplies the results by a certain value the offset is added to the results These settings are available when you turn on the baseband input Remote command See chapter 5 6 12 Configuring Envelope Tracking on page 162 Parameter A B Undocumented feature Remote command CONFigure PAE PCONsumption PARameter A CONFigure PAE PCONsumption PARameter B 3 13 Configuring Power Measurements The R amp S FSW K18 features functionlity to configure measurements that determine power characteristics of an amplifier gt To access power measurement settings proceed as follows e Inthe Configuration Overview select the Measurement button and then the Power Settings tab e Press the MEAS CONFIG key and then select the Meas Config softkey and then the Power Settings tab Configuring Power Measurements PPD PAEnvelope Supply ACP Settings Power Settings Parameter Sweep Result Summary Settings Calculate Output Power Only on off Input Power for Calculating Compression Point Reference Input Power Auto User defined P3dB Peak Reference Input Power Input Power gp wep Input Power dBm Evaluating only the D
127. e enne nennen enne nennen nnn 55 Applying Digital Predistortion eeeeeeeeeeeeneeeeennnnnneennnn nnns 57 Configuring Envelope Measurements essent nennen 59 Configuring Power Measurements eeeseeeeseseeeene eene nnne nnn nnne 61 Configuring Adjacent Channel Power ACP Measurements 63 Configuring the Parameter Sweep eese nnne nennen 64 IL 69 Configuring Traces rciieuisieieeeeaseettuiu nas TSN RAAEN ERE DR RR RR ERE SIRXRARR REIR XR RR RSS PR Ry 4AR RR cR RR 69 Selecting the Trace Information ieeee ette iie nece OEE 69 Exporiing MEI L 70 4 2 USING Markerg 70 4 2 1 Configuring Individual Markerg memes 70 4 2 2 Positioning Matkerg 00 cete te e e NEEE a er da ace 72 43 Customizing Numerical Result Tables eene 73 4 4 Configuring Result Display Characteristics eee 74 4 5 Scaling the X AxiS wesc cccccccesccccesees cdceesteesceeesstee ceceenteed o kun passa s NEENA ETASAN 77 4 6 Scaling the Y AXis niii iini sina nani si ccessateecceessteus decessutdccdessattdceceesttedie 78 5 Remote Control Commands for Amplifier Measurements 81 5 1 Overview of Remote Command Suffixes eene 81 5 Int
128. e measurement speed in case of relatively long signals for example an LTE signal On the downside limiting the estimation range leads to a higher empirical variance of the results In the preview pane displayed in the dialog box the currently defined estimation range is represented by two red vertical lines Tip You can also move the corresponding lines in the preview pane with your fingers to a new position However this is not as accurate as entering a number into the input field Remote command CONFigure ESTimation FULL on page 151 CONFigure ESTimation STARt on page 151 CONFigure ESTimation STOP on page 151 User Manual 1176 9893 02 03 52 R amp S9FSW K18 Configuring Amplifier Measurements 3 8 Evaluating Measurement Data The R amp S FSW K18 allows you to define the time frame in the reference signal used to evaluate and calculate the measurement results gt To access the evaluation range settings proceed as follows e Inthe Configuration Overview select the Sync Error Est Comp button then the Sync and Eval Range tab and then the Evaluation tab e Press the MEAS CONFIG key select the Sync Error Est Comp softkey then the Sync and Eval Range tab and then the Evaluation tab Sync and Eval Range Error Est Compensation 0 0s 533 333333333 us Synchronization Evaluation Range Evaluation Range Use Full Ref Signal OTT Eval Start rel to Ref Signal Start 5 0 us Eval Stop
129. e of the existing window By default the name of a window is the same as its index To determine the name and index of all active windows in the active measurement channel use the LAYout CATalog WINDow query lt WindowType gt Type of result display you want to use in the existing window See LAYout ADD WINDow on page 91 for a list of available window types Example LAY REPL WIND 1 MTAB Replaces the result display in window 1 with a marker table LAYout SPLitter lt Index1 gt lt Index2 gt lt Position gt This command changes the position of a splitter and thus controls the size of the win dows on each side of the splitter Compared to the brSPlay WINDowcn SIZE on page 91 command the LAYout SPLitter changes the size of all windows to either side of the splitter per manently it does not just maximize a single window temporarily Note that windows must have a certain minimum size If the position you define con flicts with the minimum size of any of the affected windows the command will not work but does not return an error y 100 x 100 y 100 1 01 GHz 102 12 dim x 0 y 0 x 100 Fig 5 1 SmartGrid coordinates for remote control of the splitters Parameters lt Index1 gt The index of one window the splitter controls lt Index2 gt The index of a window on the other side of the splitter SS ee ee oe User Manual 1176 9893 02 03 95 Configuring the Screen Layout Position New vertica
130. e sp E m 141 INIPGEGAING STA KE 141 Configuring Amplifier Measurements DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RLEVel lt ReferenceLevel gt This command defines the reference level for all traces lt t gt is irrelevant Parameters lt ReferenceLevel gt The unit is variable Range see datasheet RST 0 dBm Example DISP TRAC Y RLEV 60dBm Usage SCPI confirmed Manual operation See Reference Level on page 41 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RLEVel OFFSet lt Offset gt This command defines a reference level offset for all traces lt t gt is irrelevant Parameters lt Offset gt Range 200 dB to 200 dB RST OdB Example DISP TRAC Y RLEV OFFS 10dB Manual operation See Shifting the Display Offset on page 41 INPut ATTenuation lt Attenuation gt This command defines the total attenuation for RF input If you set the attenuation manually it is no longer coupled to the reference level but the reference level is coupled to the attenuation Thus if the current reference level is not compatible with an attenuation that has been set manually the command also adjusts the reference level Parameters lt Attenuation gt Range see data sheet Increment 5 dB RST 10 dB AUTO is set to ON Example INP ATT 30dB Defines a 30 dB attenuation and decouples the attenuation from the reference level Usage SCPI confirmed Manual operation See At
131. eName gt This command defines a file name for the waveform of the reference signal Parameters lt FileName gt String containing the name of the waveform file The file extension wv is added automatically Example CONF REFS GOS WNAM RefSignal Defines the name RefSignal for the waveform file Manual operation See Waveform File Name on page 34 Configuring Amplifier Measurements CONFigure REFSignal GOS WRITe This command transfers the reference signal characteristics defined within the R amp S FSW K18 to a signal generator Example CONF REFS GOS WRITE Transfers the reference signal to the generator Usage Event Manual operation See Designing a reference signal within the R amp S FSW K18 on page 31 CONFigure REFSignal SEGMent Segment This command selects the segment in a multi waveform file that should be used to generate the reference signal Parameters Segment numeric value integer only Range Depends on the number of segments in the wave form file RST 0 Example CONF REFS SEGM 3 Selects the 3rd segment in the waveform file CONFigure REFSignal SINFo SLENgth This command queries the sample length of the currently used reference signal Return values Samples numeric value integer only Default unit Samples Example CONF REFS SINF SLEN would return e g 40000 Usage Query only CONFigure REFSignal SINFo SRATe This command
132. eben 61 Configuring Adjacent Channel Power ACP Measurements c ceeeeeeereeees 63 Configuring the Parameter SWGGD erre eed reete atin 64 Configuration Overview Throughout the measurement channel configuration an overview of the most important currently defined settings is provided in the Overview The Overview is displayed when you select the Overview icon which is available at the bottom of all softkey menus Measurement O Source Input Clock Rate Frequency Sample Rate Signal Length Ref Level Source Capture Time Target Path On R amp S SMW Att Level Statistic Cnt Sync R amp S SMW Preamp Offset m Pai ES Reference Signal Input Output Trigger Data Acquisition hbri i ai Sync Error Est Comp Measurement i Display Config Stop On Sync Fail Modeling Sync Domain DPD State Shaping Channel I Channel Q IIe Te 3 Spectrum FFT In addition to the main measurement settings the Overview provides quick access to the main settings dialog boxes The individual configuration steps are displayed in the order of the data flow Thus you can easily configure an entire measurement channel from input over processing to output and analysis by stepping through the dialog boxes as indicated in the Overview Configuration Overview In particular the Overview provides quick access to the following configuration dialog boxes listed in the recommended order of processing 1 Reference Signal See chap
133. ed samples In case of samples that have the same values and would thus be superimposed colors represent the statistical frequency with which a certain input output level combination occurs in recorded samples Blue pixels represent low statistical frequencies red pixels high statistical frequencies A color map is provided within the result display e Modeled signal Shows the AM AM characteristics of the model that has been calculated The mod eled signal is calculated by applying the DUT model to the reference signal When the model matches the characteristics of the DUT the characteristics of the model signal are the same as those of the measured signal minus the noise The modeled signal is represented by a line trace When system modeling has been turned off this trace is not displayed All traces include the digital predistortion when you have turned that feature on R amp S FSW K18 Performing Amplifier Measurements umm EEE EEE EE ee e IdealLine 48 0 dBm 12 0 dBm Remote command Selection LAY ADD AMAM Result query TRACe lt n gt DATA on page 102 AM PM The AM PM result display shows nonlinear effects of the DUT It shows the phase dif ference between DUT input and output for each sample of the synchronized measure ment signal The ideal AM PM curve would be a straight line at 0 However nonlinear effects result in a measurement curve that does not follow the ideal curve Typically the curve drifts
134. eeananseacaeeneeederetee 122 FE TChP TABle B bowerMiNimum SI REGO 122 FEICGh IPTABle BBPowerMINimumi d RU BE 122 FETCh PTABle BBPowerMINimum RESult 2 22 22 izle ecco etate 122 FETCh PTABIe CFACtor MAXimum X RESUII eaae eene eenen enitn nennen ana aa 122 FETCh PTABle CFACtor MAXimum Y RESUIt cessisse eene 122 FETChIPTABle CFACtor MAXImump RESU 2 221i REENEN AEEEEE REESEN 122 FETCh PTABIe CFACtor MINimunmt X RESUlt 2 2 ir ran trita onn Lote renes 122 FE TChPBTABle CEACtorMiNimum vlT RE Gu 122 FETChIPTABle CFACtorMINIm mp RESUl adiret a aa 122 FETChiPTABIe EVM MAXimumi X RESuult 2 2 rotor oat totu accro 123 FETCh P TABIe EVM MAXImum YU RESull 12 titor riter ee ten cen rs 123 FETChiP TABIe EVMIMAXIm mp GT DEE 123 FETCI PTABIe EVMPMINIm msXDIRESuUlt 1 22 2 2 22 22 rrr rore coto cete tope eter 123 FETOh P TABIe EVM MINImUm EI TE 123 E TEE Ee Heft EE TT RE 123 FETCHP EABIe GAINIMAXIRUmEXE RESI cea enano eter anna ens 123 FETChIPTABle GAIN MAXimumry ERESUlt 2 22 222 2 2222220 m r1 Loro eerte tree abe Lea aud 123 FETGh P TABIe GAIN MAXImum FRESUlt 22 tnit rhet e nette SEENEN ES 123 FETCh PTEABIS GAINSMINImOREXERES Ult tiet ce eatur rented cete nene eria 123 FETCh PTABle GAIN MINimum Y RESUIt 2 2 aniio oio a eco aerian ciiin ea 123 FETGhPTEABIe SAINOMINImumi RESult 2 t
135. een successful Check if the connection between analyzer and generator has been established or if the IP address has been stated correctly Designing a reference signal on a signal generator One way to design a reference signal is to design the signal on the signal generator itself You can design any signal you like as long as it is storable as an arbitrary waveform ARB file When you are done you have to transfer the signal information from the signal generator to the signal analyzer with the Read Signal from R amp S SMW button Designing a Reference Signal Current Generator Waveform Custom Waveform File Generate Own Signal Read Signal to LJ Read and Load Current Signal from R amp S SMW gnal Information MHz Sample Length Most of the options available for the R amp S SMW are supported by the automatic signal import functionality of the R amp S FSW K18 If the signal import was not successful indi cated by a red LED you have to transfer the reference signal in another way for example with a memory stick For a comprehensive description of all features available on the signal generator and information on how to generate signals please refer to the documentation of the signal generator Remote command See signal generator documentation CONFigure REFSignal CGW READ on page 128 CONFigure REFSignal CGW LEDState on page 127 Designing a reference signal in a waveform file One way to design a reference
136. een synchronized reference and mea surement signal Power of the transmission channel Power of the adjacent channels upper and lower RMS signal power at the DUT output Gain of the DUT Crest factor of the signal at the DUT output The crest factor is the ratio of the RMS and peak power Spread of the samples in the AM AM or AM PM result display com pared to the ideal AM AM or AM PM curve Amplifier supply voltage Amplifier current consumption Amplifier DC power Power Added Efficiency chapter 5 5 3 3 Retrieving Results of the Parameter Sweep Table on page 116 mum EP EIN ee User Manual 1176 9893 02 03 23 3 1 Configuration Overview Configuring Amplifier Measurements eeler P T 24 Performing Measurgtrehts 2 22 Lares teenies iv EES ENEE 26 Designing a Reference Sighal toD ur etuer Dara ap Ere eut eges 27 Configuring Inputs and Outputs AE 34 Triggering Measurements itii nuoc cesarea ico c YE Lect ceo Lone 47 Configuring the Data Captures ics tent ee no ette AO 47 Synchronizing Measurement Data 50 Evaluating Measurement Bala reete ne eee treten rg oet ee tee 53 Estimating and Compensating Signal Errors A 54 Applying System Models ret rte teet HE tete e near needed 55 Applying Digital PredistorttOn TEE 57 Configuring Envelope Measurements 2 eoe cereis 59 Configuring Power Measurements 4 eene nere tenent tentent rnit a n
137. eference signal and the measured sig nal FETCh MACCuracy MERRor CURRent RESult on page 107 Phase Error Phase difference between reference and measurement signal If you are using the RF path for measurements the phase between reference and measurement signal is random because the RF phases between signal generator and analyzer are not locked even if the reference frequencies are locked This is a typical behavior of two RF measurement instruments FETCh MACCuracy PERRor CURRent RESult on page 107 Quadrature Error Phase deviation of the 90 phase difference between the real I and imagi nary Q part of the signal Within a typical transmitter the and Q signal parts are mixed with an angle of 90 by the IQ output mixer Due to hardware imperfections the signal delay of and Q may be different and thus lead to an angle non equal to 90 FETCh MACCuracy QERRor CURRent RESult on page 107 Gain Imbalance UO Imbalance UO Offset Gain difference between the real I and imaginary Q part of the signal This effect is typically generated by two separate amplifiers in the and Q path of the analog baseband signal generation which have different gains FETCh MACCuracy GIMBalance CURRent RESult on page 106 Combination of Quadrature error and Gain imbalance The UO imbalance parameter is another representation of the combination of Quadrature error and gain imbalance FETCh MACCuracy IQIMbalance CURRen
138. enaena ESAE EaR ERSA trece 126 FETCh PTABIe RESult ALL 118 FETCh QVOLtage P RE CURReRI RESUlt 5 2 coner te tnn e Re renean ieri 115 FETCh QVOLtage PURE MAXim mpRESult 2 c toic tnit ere EE etat ten tutta nette nter 115 FETCh QVOLtage PURE MlINimuim RESUlt cci EAR 115 FE TCM SYNG FAM EUM 153 FETCh TTE GURRent RESUlt onere rtr ette ette saan ren ere ETETE EDI EEE Eres E NEENU TEESE 104 FETCh VOO GURRent RESuli otect ettet ete eet etiem t cette Pere net nen tee 115 FETGh VOC IMAXim mpRESult cista iaceo co eruere eri ae eer rcr rrr rear eee bens 115 RAL deed e ul BT RE 115 INITiatesn gt CONMGAS C H 98 Jl Ee CN Ni UC 99 INITilatesms SEQUuencerABORLE EE 100 INI Tiate ns SEQuencerIMMediale tpe terre ier i ahs 100 INI Tiatesnz SEQuenceE MODE socer irit eei ecu rece e p ir t eor e eem EY ied ocu the 100 INITiate lt n gt IMMediate Se INPULAT TOMU e TEE INPUtATIen atioM AUTO DEE 139 MIN UTE COIN oio C 134 INPULGOU zd aro S 135 INPUt D PAM m R 135 lyguszqgem 140 INPGEATT Ugo H 140 ll RER MK 140 INP t EIL Ter HPASSESTATe iier o onore pe oat ro caeseedeanicest easasdgeneedesnesavsaises ster s FEY E HUE Era Y ege ons 135 INP
139. ennene 120 FETOChPIABle AC ACHannel nz Uber MiNimum SIRESu nenen eeen se eeeeeeerssersese 120 FETCh PTABle ACP ACHannel n UPPer MINimum Y RESUIt eeeeeesesesssss 120 Performing Amplifier Measurements FETCh PTABle ACP ACHannel n UPPer MINimum RESUIt eese 120 FETCh PTABIe AMAM CWIDth MAXimum X RESUII esee 120 FETCh PTABIe AMAM CWIDth MAXimum Y RESUIt esee 120 FETChPRITABle AMAM CWNIDth MA XimumfREGOR cece eee ee ee eeeeeeee esse eeaeeesaeeea eee 120 FETCh PTABle AMAM CWIDth MINimum X RESult AAA 120 FETCh PTABIe AMAM CWIDth MINimum Y RESult esee 120 FETCh PTABIe AMAM CWIDth MINimum RESUIt eese 120 FETCh PTABIe AMPM CWIDth MAXimum X RESUIt eese 121 FETCh PTABIe AMPM CWIDth MAXimum Y RESUIt esee 121 FE TChPRITABle AMPM CWNIDth MA XimumfREGOR cece eee ee ce eee ee eea nese eeaeeeseeea eee 121 FETCh PTABIe AMPM CWIDth MINimum X RESuIt esee esee 121 FETCh PTABIe AMPMEIGWIDth MINIRmUm Y FSES ult 2 2 2 2 00 eoi crore aec 121 FE TChPBITABle AMPDM CW MiNmmmumf RE GO 121 FETChP TABle B bowerMANimum XIRE Gu 122 FETCh PTABIe BBPowerMAXimumtY RESult 2 2 ciun s enitn eite ee 122 FETCh PTABle BBPower MAXimum RESuIt c cecececeeenecececentec
140. ent Before this command can be executed the Sequencer must be activated see SYSTem SEQuencer on page 101 Suffix lt n gt irrelevant Example SYST SEQ ON Activates the Sequencer INIT SEQ MODE SING Sets single sequence mode so each active measurement will be performed once INIT SEQ IMM Starts the sequential measurements Usage Event INITiate lt n gt SEQuencer MODE lt Mode gt This command selects the way the R amp S FSW application performs measurements sequentially Before this command can be executed the Sequencer must be activated see SYSTem SEQuencer on page 101 Note In order to synchronize to the end of a sequential measurement using OPC OPC or WAI you must use SING1e Sequence mode Suffix n irrelevant Performing Amplifier Measurements Parameters Mode SINGIe Each measurement is performed once regardless of the chan nel s sweep mode considering each channels sweep count until all measurements in all active channels have been per formed CONTinuous The measurements in each active channel are performed one after the other repeatedly regardless of the channel s sweep mode in the same order until the Sequencer is stopped CDEFined First a single sequence is performed Then only those channels in continuous sweep mode INIT CONT ON are repeated RST CONTinuous Example SYST SEQ ON Activates the Sequencer INIT SEQ MODE SING Sets single sequence mode s
141. ent tasks that involve a specific number of subsequent sweeps for example the Parameter Sweep X Axis X axis value that is currently measured Y Axis Y axis value that is currently measured Window title bar information For each diagram the header provides the following information Time Domain a 2 Fig 1 3 Window title bar information of the amplifier application 1 Window number 2 Window type 3 Trace color and number 4 Trace mode Status bar information Global instrument settings the instrument status and any irregularities are indicated in the status bar beneath the diagram Furthermore the progress of the current operation is displayed in the status bar R amp S FSW K18 Performing Amplifier Measurements 2 Performing Amplifier Measurements Note that you can use the R amp S FSW K18 with the Sequencer available with the R amp S FSW The functionality is the same as in the Spectrum application Please refer to the R amp S FSW User Manual for more information Nurnerc Ebsblt SUMMAN caerra ed ec e tet tete ENEE dita 10 L Results to check modulation aCcuracN ees 11 L Results to check power characherlstcs 12 L Results to check the power supply characteristics of the amplifier 12 Adjacent Channel Power EE 13 AMAM X 14 ANY Misc 15 Gain COMES SION EE 16 Magnitude Capture RF
142. ents the sample with the highest value captured in the last sweep Results that evaluate each captured sample e Raw EVM and Raw Model EVM Power In and Power Out e Gain e All baseband results except the Average PAE Note When synchronization has failed or has been turned off some results may be unavailable Remote command Selecting the result display LAY ADD 1 LEFT RTAB Querying results see chapter 5 5 3 Retrieving Numeric Results on page 103 Results to check modulation accuracy Numeric Result Summary Raw EVM Error vector magnitude between synchronized reference and measurement signal FETCh MACCuracy REVM CURRent RESult on page 108 Raw Model EVM Error vector magnitude between synchronized reference and model signal FETCh MACCuracy RMEV CURRent RESult on page 108 Frequency Error Difference of the RF frequency of the reference signal compared to the mea sured signal If the reference frequencies are coupled the frequency offset should be about 0 Hz If the offset is very high it is likely that the reference frequency sources are not coupled correctly e g if the analyzer is configured for external reference frequency but the cable is not connected FETCh MACCuracy FERRor CURRent RESult on page 105 Sample Rate Error Sample rate difference between reference and measurement signal FETCh MACCuracy SRERror CURRent RESult on page 109 Magnitude Error Difference in magnitude between the r
143. er select a range of polynomials e g 1 7 a selection of polynomials e g 1 3 5 or a combination of both e g 1 3 5 Range 0 to 18 RST 4 7 Example CONF MOD AMAM ORD 1 5 Calculates the polynomials to the 1st 2nd 3rd 4th and 5th degree Example CONF MOD AMAM ORD 1 3 5 Calculates the polynomials to the 1st 3rd and 5th degree Manual operation See Selecting the degree of the polynomial on page 56 Configuring Amplifier Measurements CONFigure MODeling AMPM ORDer Order This command defines the order or degree of the AM PM model polynomials that should be calculated Parameters Order String containing the polynomials to be calculated You can either select a range of polynomials e g 1 7 a selection of polynomials e g 1 3 5 or a combination of both e g 1 3 5 Range 0 to 18 RST 4 7 Example CONF MOD AMPM ORD 1 3 5 Calculates the polynomials to the 1st 3rd 4th and 5th degree Manual operation See Selecting the degree of the polynomial on page 56 CONFigure MODeling LRANge Level This command defines the modeling level range Parameters Level numeric value Default unit dB Example CONF MOD LRAN 30 Defines a modeling level range of 30 dB Manual operation See Defining the modeling range on page 56 CONFigure MODeling NPOints Points This command defines the number of modeling points Parameters Points numeric value intege
144. eraa eaea ted e adag o t d et a aaa t 86 LAE 0040 0 T 86 Numeric Values Numeric values can be entered in any form i e with sign decimal point or exponent In case of physical quantities you can also add the unit If the unit is missing the com mand uses the basic unit Example with unit SENSe FREQuency CENTer 1GHZ without unit SENSe FREQuency CENTer 1E9 would also set a frequency of 1 GHz 5 2 6 2 Introduction Values exceeding the resolution of the instrument are rounded up or down If the number you have entered is not supported e g in case of discrete steps the command returns an error Instead of a number you can also set numeric values with a text parameter in special cases e MIN MAX Defines the minimum or maximum numeric value that is supported e DEF Defines the default value e UP DOWN Increases or decreases the numeric value by one step The step size depends on the setting In some cases you can customize the step size with a corresponding command Querying numeric values When you query numeric values the system returns a number In case of physical quantities it applies the basic unit e g Hz in case of frequencies The number of dig its after the decimal point depends on the type of numeric value Example Setting SENSe FREQuency CENTer 1GHZ Query SENSe FREQuency CENTer would return 1E9 In some cases numeric values may be returne
145. eric value gt For RESult Minimum or maximum result that has been measured For X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTing Example FETC PTAB PAE MAX would return e g 89 3 PCT Usage Query only FETCh PTABle RMS MAXimum X RESult FETCh PTABle RMS MAXimum Y RESult FETCh PTABle RMS MAXimum RESult FETCh PTABle RMS MINimum X RESult FETCh PTABle RMS MINimum Y RESult FETCh PTABle RMS MINimum RESult These commands query the result values for the RMS Power result as shown in the Parameter Sweep Table Return values lt Results gt lt numeric value gt For RESult Minimum or maximum result that has been measured For X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTin
146. escribe several characteristics of the measurement equipment in order to get valid results gt To access the envelope settings proceed as follows Configuring Envelope Measurements e Inthe Configuration Overview select the Measurement button and then the PA Envelope Supply tab e Press the MEAS CONFIG key select the Meas Settings softkey and the PA Envelope Supply tab Modeling DPD PAEnvelope Supply ACP Settings Power Settings Parameter Swe PAE Measurement Settings Current Icc Baseband Input I Multiplier R Ohms Offset Volts Voltage Vcc Baseband Input Q Multiplier 1 Offset Volts Multiplier R Power Consumption PC PAE Settings V W o Offier x Multiplier PC Formula A x Vcc x Icc B x Vcc 2 I7 Offset x Parameter A Parameter B Configuring PAE measurements Power Added Efflcency eee 60 Paramo tc m 61 Configuring PAE measurements Power Added Efficiency When you are testing amplifiers that support envelope tracking the Power Added Effi ciency PAE of the system is the value that characterizes its performance To calculate the PAE you have to measure the supply voltage and current drawn by the power amplifier The PAE is calculated according to the following equation PAE RF Output Power RF Input Power DC Power with DC Power Voltage Current Measuring the voltage and current requires additional equipment and com
147. esult Type EVM Display Min and Max Scope of the scaling The functionality of the Display Settings is only available when you have selected one of the result displays that support this feature from the Specifics for dropdown menu at the bottom of the dialog box In this case the functionality to adjust the Time Domain result display Configuring the Time Domain result display 75 Configuring the AM PM result display mre tne tent ett trente ten 76 Configuring the Gain Compression Result Display 76 Selecting the result type displayed in the Parameter Sweep diagram 76 Configuring the Time Domain result display The Time Domain settings select the information displayed in the Time Domain result display and can thus be used to customize the diagram scale You can define the characteristics of the x axis the amount of displayed data as well as those of the y axis normalized data or actual units Available when the Time Domain result display has been selected Configuring Result Display Characteristics For more information see Time Domain on page 20 Remote command Normalization DISPlay WINDow lt n gt TDOMain Y SCALe NORMalise STATe on page 185 Position DISPlay WINDow lt n gt TDOMain X SCALe MODE on page 185 Origin DISPlay WINDow lt n gt TDOMain X SCALe OFFSet on page 185 Duration DISPlay WINDow lt n gt TDOMain X SCALe DURation on page 184
148. eter Se Start 1 0 GHz Stop 2 0 GHz Step 10 0 MHz Adjust Level Couple FSx and SMx Level Expected Gain Turning the parameter sweep on and off Before you can use the Parameter Sweep functionality you have to turn it on sepa rately When you turn it on the application starts the Parameter Sweep in single sweep mode RUN SGL and RUN CONT both start the Parameter Sweep in that case When the Parameter Sweep is on other measurements are not possible and vice versa User Manual 1176 9893 02 03 66 R amp S9FSW K18 Configuring Amplifier Measurements Turning on the Parameter Sweep also expands the channel bar by several labels that carry information about the progress of the Parameter Sweep Remote command CONFigure PSWeep STATe on page 168 Selecting the data to be evaluated during the Parameter Sweep When you are performing a Parameter Sweep you can compare an arbitrary result against one or two arbitrary parameters Depending on your selection the R amp S FSW K18 changes the values of the selected parameters on the signal generator during the measurement and calculates the result for each combination of values Note that when you open more than one instance of the Parameter Sweep the appli cation applies the selected parameters to all instances the displayed results on the other hand can be different for each instance Center Frequency Controls the frequency of the signal generator e Generator Powe
149. ff The wideband signal path is available with the corresponding bandwidth extensions available for the R amp S FSW for example R amp S FSW B160 Parameters State ON Turns on the wideband signal path By default the application allows you to use the maximum avail able bandwidth Auto mode in manual operation You have to turn on the wideband signal path when you want to use bandwidths greater than 80 MHz OFF Turns off the wideband signal path The largest available band width is 80 MHz Configuring Amplifier Measurements Example TRAC IQ WBAN OFF Turns off the wideband signal path Manual operation See Configuring the measurement bandwidth on page 48 5 6 7 Synchronizing Measurement Data GONFigure ESTimaltiogn FULL opari npa ete pope uet ba tetuer pa uia pope rne rate epo dax 151 GONFiguire ES Timation STAR tise 2 2 22 rir tirare EE EES TER de EN 151 GONFIgure ESTiatlonm DODP EE 151 CONFigure SYNG CONFIdGBnGe iirinn nianna aa iani andedi aiia 152 CON Figures SYNC DOMIR e 152 CONFigure SYNC SOF AI sesiis iiiaae aori Tuer e A ESAE aiaa EEES 152 EE L Die SYNC STATE bw TT 153 FETOMSYNC TEE 153 CONFigure ESTimation FULL lt State gt This command turns estimation over the complete reference signal on and off Parameters lt State gt ON OFF When you turn estimation over the full reference signal off you can define a estimation range with CONFigure ESTimation S
150. figuring Amplifier Measurements TRACe IQ BWIDth Bandwidth This command defines the analysis bandwidth with which the amplified signal is cap tured This command is available when TRACe 10 SRATe AUTO has been turned off Note that when you change the analysis bandwidth the sample rate and capture length are adjusted automatically to the new bandwidth Parameters Bandwidth numeric value Note that the application automatically adjust the sample rate when you change the bandwidth manually Default unit Hz Example TRAC IQ SRAT AUTO OFF TRAC IQ BWID 50MHZ Defines a bandwidth of 50 MHz The sample rate is adjusted accordingly Manual operation See Configuring the measurement bandwidth on page 48 TRACe IQ SRATe lt SampleRate gt This command defines the sample rate with which the amplified signal is captured This command is available when TRACe 10 SRATe AUTO has been turned off Note that when you change the sample rate the analysis bandwidth and capture length are adjusted automatically to the new sample rate Parameters lt SampleRate gt lt numeric value gt Note that the application automatically adjust the analysis band width when you change the sample rate manually Default unit Hz Example TRAC IQ SRAT AUTO OFF TRAC IQ SRAT 20MHZ Defines a sample rate of 20 MHz The analysis bandwidth is adjusted accordingly Manual operation See Configuring the measurement bandwidth on page 48 T
151. from a zero phase shift especially at high power levels when you drive the amplifier into saturation The width of the AM PM trace is an indicator of memory effects the larger the width of the trace the more memory effects occur The AM PM Curve Width is shown in the numerical Result Summary The x axis shows the levels of all samples of the synchronized measurement signal in dBm The y axis shows the phase of the signal for the corresponding power level The unit is either rad or degree depending on your phase unit selection in the Display Settings You can analyze the AM PM characteristics of the real DUT or of the modeled DUT e Measured signal Shows the AM PM characteristics of the DUT The software uses the reference signal together with the synchronized measure ment signal to calculate a software model that describes the characteristics of the device under test The measured signal is represented by a colored cloud of values The cloud is based on the recorded samples In case of samples that have the same values and would thus be superimposed colors represent the statistical frequency with which a certain input output level combination occurs in recorded samples A color map is provided within the result display e Modeled signal Shows the AM PM characteristics of the model that has been calculated The mod eled signal is calculated by applying the DUT model to the reference signal When the model matches the characteristi
152. g 5 6 Configuring Amplifier Measurements Example FETC PTAB RMS MIN would return e g 12 032 DBM Usage Query only FETCh PTABle VCC MAXimum X RESult FETCh PTABle VCC MAXimum Y RESult FETCh PTABle VCC MAXimum RESult FETCh PTABle VCC MINimum X RESult FETCh PTABle VCC MINimum Y RESult FETCh PTABle VCC MINimum RESult These commands query the result values for the V_cc result as shown in the Parame ter Sweep Table Return values lt Results gt lt numeric value gt For RESult Minimum or maximum result that has been measured For X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTing Example FETC PTAB VCC MIN X would return e g if the x axis represents the frequency 10000000 HZ Usage Query only Configuring Amplifier Measurements Designing a Relerence Sigtial t e rette i inden t e a teg SEENEN 127 Selecting and Configuring the Input Source ceterae 134 Configuring the FEequefiGy isa iecur rr Rene ri taedet re timere eus tunc ed sees 137 Defining Level Characteristics
153. g 1 3 5 7 in that case the application applies those degrees only Note that the key on the front panel draws the character e Define a combination of the methods mentioned above e g 1 3 5 7 Remote command AM AM CONFigure MODeling AMAM ORDer on page 157 AM PM CONFigure MODeling AMPM ORDer on page 158 Defining the modeling range By default the R amp S FSW K18 applies the model to the complete signal Most of the time however it is sufficient to apply the model to a small number of samples covering the linear level range and the peak level of the amplifier User Manual 1176 9893 02 03 56 Applying Digital Predistortion With the Modeling Level Range setting you can use a smaller level range to apply the model to and still yield valid results When you limit the level range only samples with levels between peak level and peak level minus modeling level range value are taken into account during the calculation of the model Note that the modeling range is also the range the DPD is applied to In addition you can define the number of points on the curve that the application uses to calculate the model The selected points are spaced equidistant Using less model ing points further speeds up measurement times but may reduce the quality of the model if set too low Remote command Range CONFigure MODeling LRANge on page 158 Points CONFigure MODeling NPOints on page 158 3 11 Applying Digital Predist
154. g nal and against the modeled signal e Measured signal against reference signal Trace 1 compares the measured signal and the reference signal To get useful results the calculated linear gain is compensated to match both sig nals Depending on the DUT noise and nonlinear effects may have been added to the measurement signal These effects are visualized by this trace e Measured signal against modeled signal Trace 2 compares the measured signal and the modeled signal User Manual 1176 9893 02 03 18 R amp S FSW K18 Performing Amplifier Measurements E SS ey The EVM between the measured and modeled signal indicates the quality of the DUT modeling If the model matches the DUT behavior the modeling error is zero or is merely influenced by noise This result display shows changes in the model and its parameters and thus allows you to optimize the modeling When system modeling has been turned off this trace is not displayed Note that the raw EVM is calculated for each sample that has been recorded Thus the raw EVM might differ from EVM values that are calculated according to a specific mobile communication standard that apply special rules to calculate the EVM for example LTE Remote command Selection LAY ADD REVM Result query TRACe lt n gt DATA on page 102 Error Vector Spectrum The Error Vector Spectrum result display shows the error vector EV signal in the spectrum around the center freq
155. ghted The running measurement can be aborted by selecting the highlighted softkey or key again Remote command INITiate lt n gt CONMeas on page 98 3 3 Designing a Reference Signal Many of the results available in the R amp S FSW K18 require a reference signal that describes the characteristics of the signal you feed into the amplifier The reference signal describes the characteristics of the signal that you feed into the amplifier and whose amplified version is measured by the application You can define any signal you want as a reference signal The application provides several methods to design a reference signal Designing the signal on a generator Having a Rohde amp Schwarz generator is mandatory for this method Designing the signal in a waveform file Designing the signal in the R amp S FSW K18 Having a Rohde amp Schwarz generator is mandatory for this method For a list of supported signal generators refer to the datasheet of the R amp S FSW K18 gt To access reference signal settings proceed as follows e Inthe Configuration Overview select the Reference Signal button e Press the MEAS CONFIG key and then select the Reference Signal softkey The dialog box to configure the reference signal is made up out of three tabs Each tab represents one of the available methods to design the reference signal Signal information Each tab of the Reference Signal dialog box contains some basic information
156. gt Y SCALe MAXimum Value This command defines the value at the top of the y axis Suffix n 1 n t 1 n Parameters Value numeric value Default unit Depends on the result display Example Manual operation Analyzing Results DISP TRAC Y AUTO OFF DISP TRAC Y MIN 10DBM DISP TRAC Y MAX 110DBM The y axis covers a level range of 100 dB See Scaling the y axis manually on page 79 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe MINimum Value This command defines the value at the bottom of the y axis Suffix n lt t gt Parameters lt Value gt Example Manual operation lt numeric value gt Default unit Depends on the result display DISP TRAC Y AUTO OFF DISP TRAC Y MIN 10DBM DISP TRAC Y MAX 110DBM The y axis covers a level range of 100 dB See Scaling the y axis manually on page 79 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe PDIVision Distance This command defines the distance between the grid lines in graphical result displays Available when you turn off automatic scaling with DISPlay WINDow lt n gt TRACe t Y SCALe AUTO Suffix n lt t gt Parameters lt Distance gt Example Manual operation lt numeric value gt Default unit Depends on the result display DISP TRAC Y SCAL AUTO OFF DISP TRAC Y PDIV 5DBM Defines a distance of 5 dBm between the grid lines See Scaling the y axis manually on
157. gure PSWeep EXPected GAIN Gain This command defines the expected gain of the DUT This is necessary when you synchronize the generator output level and the reference level of the analyzer CONFigure PSWeep ADJust LEVel STATe ON The command is available when one of the parameters used in the Parameter Sweep is the Generator Power Parameters Gain numeric value Default unit dB Example CONF PSW ADJ LEV ON CONF PSW EXP GAIN 5 Defines an expected gain of 5 dB Configuring Amplifier Measurements Manual operation See Synchronizing the levels of signal generator and analyzer on page 67 CONFigure PSWeep STATe State This command turns the Parameter Sweep on and off Parameters State ON OFF Example CONF PSW ON Turns on the Parameter Sweep Manual operation See Turning the parameter sweep on and off on page 66 CONFigure PSWeep X SETTing lt Setting gt This command selects the parameter type for the first parameter controlled by the Parameter Sweep Parameters lt Setting gt BIAS Controls the envelope bias DELay Controls the delay between envelope and RF signal FREQuency Controls the frequency POWer Controls the output level Example See CONFigure PSWeep Y SETTing CONFigure PSWeep X STARt lt Start gt This command defines the start value for the first parameter controlled by the Parame ter Sweep Parameters lt Start gt lt numeric value gt
158. have changed Example CONF DPD UPD Updates the shaping table Usage Event Configuring Amplifier Measurements CONFigure DPD UPDate LEDState This command queries the state of an update of the shaping table Return values lt State gt GREen Transmission was successful GREY Unknown transmission state RED Transmission was not successful Example CONF DPD UPD CONF DPD UPD LEDS would return e g GREY Usage Query only 5 6 12 Configuring Envelope Tracking CONFig re PAEICHanmnebl GET D Le TE EE 162 GONFigure PAE ICHanriel OFFSel 2 2 cocer oer idee aana eevee 162 GONFigure PAE CHannel RESISIOI eto hierher re oe qe het y EXER ERR RR R RR REPE a 163 CONFigure PAE QCHannel MULTiplier eeeeessssssssseeeeen nnne 163 GONFigure PAE QCHannel OFFSel c utet eere eee drove eaae p a etna 163 CONFigure PAE ICHannel MULTiplier lt Multiplier gt This command defines a multiplier to take into account various effects resulting from the measurement equipment connected to the channel Parameters lt Multiplier gt lt numeric value gt Example CONF PAE ICH MULT 0 75 Defines a multiplier of 0 75 CONFigure PAE ICHannel OFFSet lt Offset gt This command defines an offset for the channel Parameters lt Offset gt lt numeric value gt Default unit No unit Example CONF PAE ICH EOFF 1 Defines a
159. he Evaluation Range CONEIgaredsvVAbuaden Ell cce darte nte one cetur aeo toe Aiea ee e texere E Ren ae 153 GONFigure EVALuatlonXS KEE 154 GONFigure EVAkuatianS e 154 This command turns result evaluation over the complete capture buffer on and off 5 6 9 Configuring Amplifier Measurements Parameters State ON OFF When you turn calculation over the full capture buffer off you can define an evaluation range with CONFigure EVALuation STARt CONFigure EVALuation STOP RST ON Example CONF EVAL FULL OFF CONF EVAL STAR 5us CONF EVAL STOP 50us Defines an evaluation range over 45 us of the capture buffer Manual operation See Defining the evaluation range on page 53 CONFigure EVALuation STARt lt EvaluationStart gt This command defines the start value of the evaluation range Parameters lt EvaluationStart gt lt numeric value gt Default unit s Example See CONFigure EVALuation FULL Manual operation See Defining the evaluation range on page 53 CONFigure EVALuation STOP lt EvaluationStop gt This command defines the end value of the evaluation range Parameters lt EvaluationStop gt lt numeric value gt Default unit s Example See CONFigure EVALuation FULL Manual operation See Defining the evaluation range on page 53 Estimating and Compensating Signal Errors CONFigure SIGNal ERRor COMPe
160. he LAYout WINDow lt n gt REPLace command This command is always used as a query so that you immediately obtain the name of the new window as a result Parameters Direction LEFT RIGHt ABOVe BELow lt WindowType gt Type of measurement window you want to add See LAYout ADD WINDow on page 91 for a list of available window types Return values lt NewWindowName gt When adding a new window the command returns its name by default the same as its number as a result Configuring the Screen Layout Example LAY WIND1 ADD LEFT MTAB Result 2 Adds a new window named 2 with a marker table to the left of window 1 Usage Query only LAYout WINDow lt n gt IDENtify This command queries the name of a particular display window indicated by the lt n gt suffix in the active measurement channel Note to query the index of a particular window use the LAYout IDENtifyl WINDow command Return values lt WindowName gt String containing the name of a window In the default state the name of the window is its index Example LAY WIND2 IDEN Queries the name of the result display in window 2 Response 2 Usage Query only LAYout WINDow n REMove This command removes the window specified by the suffix n from the display in the active measurement channel The result of this command is identical to the 1 3 yout REMove WINDow command Example LAY WIND2 REM Removes the resu
161. he baseband I channel BLANk Turns the trace off BBPower Selects the trace showing the combined data of the and Q channel BBQ Selects the trace showing data recorded on the baseband Q channel MODel Selects the trace showing the modeled signal REFerence Selects the trace showing the reference signal RF Selects the trace showing the measured signal recorded on the RF input WRIT Selects the clear write trace Example e g for the AM AM result display DISP WIND TRAC1 MODE RF DISP WIND TRAC2 MODE MOD Displays the measured and the modeled signal e g for the Spectrum EVM result display DISP WIND TRAC1 MODE RF DISP WIND TRAC2 MODE BLAN Displays the measured signal and hides the modeled signal E EH F P F H Result display Supported traces AM AM RF always trace 1 MODel always trace 2 BLANK for both traces AM PM RF always trace 1 MODel always trace 2 BLANK for both traces Gain Compression RF always trace 1 Magnitude Capture RF and Q WRITe always trace 1 PAE Input Power WRITe always trace 1 PAE Time WRITe always trace 1 Power vs Time WRITe always trace 1 5 7 2 Using Markers 5 7 2 1 Analyzing Results Result display Raw EVM Supported traces REFerence always trace 1 MODel always trace 2 BLANK for both traces Spectrum EVM REFerence always trace 1 MODel always trace 2 BLANK for both traces Spec
162. he reference signal If you use one of these you have to select the segment that you want to use as a reference signal in the corresponding input field Note that the content of the segment you are using for the reference signal has to match the content of the segment that is currently used by the ARB of the signal gener ator You can select the segment for the used by the generator in the Generator Setup Remote command CONFigure REFSignal SEGMent on page 133 Transferring the reference signal iere aecenas e 28 Designing a reference signal on a signal generator ee eeeeeteceeeeentteeeeeeeteeeeeeenaaes 29 Designing a reference signal in a waveform file 30 Designing a reference signal within the R amp S FSW K18 eeeenes 31 roodo UC a a a a 32 E nen BandWidth iaia a ae E Rp 32 ER o Rf EE 33 hi 17 Mw P 33 ML Ci UU UU 33 M cla MOM P 33 L Pulse Duty CUBE o oa eege 33 M ndi NE 34 Keeser Deene Ets deene 34 Transferring the reference signal Both the signal generator and analyzer used in the test setup need to know the charac teristics of the reference signal e The signal generator needs that information to generate the signal e The analyzer needs that information for the evaluation of the results Designing a Reference Signal This is why you have to transfer the signal information to both instruments The trans mission is done through a LAN connection
163. he sig nals are identical in that they are linearily dependent The cross correlation is calculated over all samples in the capture buffer or the esti mation range if you have defined one As soon as the cross correlation coefficient falls below the confidence level you have defined synchronization is no longer successful Remote command CONFigure SYNC CONFidence on page 152 Defining the estimation range The estimation range has several effects on the synchronization process e t defines which part of the reference signal is used for cross correlation within the capture buffer in order to align the reference and measured signals e It defines which part of the reference signal is used for error estimation By default the application estimates over the complete reference signal However you can also estimate over a given range in the capture buffer only In that case turn off the Use Full Ref Signal feature When this is off the Eval Start and Eval Stop fields become available The allowed values are offsets relative to the beginning of the capture buffer 0 s The highest offset possible depends on the size of the capture buf fer Defining an estimation range is useful in the following cases e If you want to limit the estimation to a specific part of the signal for example if the signal contains a preamble or midamble If you want to limit the estimation to the ON part of a TDD signal e f you want to increase th
164. iagram Remote command CALCulate lt n gt MARKer lt m gt X on page 177 CALCulate lt n gt DELTamarker lt m gt X on page 175 Marker Type Toggles the marker type The type for marker 1 is always Normal the type for delta marker 1 is always Delta These types cannot be changed Note If normal marker 1 is the active marker switching the Mkr Type activates an additional delta marker 1 For any other marker switching the marker type does not activate an additional marker it only switches the type of the selected marker Normal A normal marker indicates the absolute value at the defined position in the diagram Using Markers Delta A delta marker defines the value of the marker relative to the speci fied reference marker marker 1 by default Remote command CALCulate lt n gt MARKer lt m gt STATe on page 176 CALCulate lt n gt DELTamarker lt m gt STATe on page 175 Reference Marker Defines a marker as the reference marker which is used to determine relative analysis results delta marker values Remote command CALCulate lt n gt DELTamarker lt m gt MREF on page 174 Assigning the Marker to a Trace The Trace setting assigns the selected marker to an active trace The trace deter mines which value the marker shows at the marker position If the marker was previ ously assigned to a different trace the marker remains on the previous frequency or time but indicates the value of the new trace
165. ing at the offset defined with DISPlay WINDow lt n gt TDOMain X SCALe OFFSet Default unit s Example DISP TDOM X MODE OFF DISP TDOM X DUR 12us Scales the x axis to display 12 us in the Time Domain result dis play Usage Query only Manual operation See Configuring the Time Domain result display on page 75 Analyzing Results DISPlay WINDow lt n gt TDOMain X SCALe MODE State This command turns automatic scaling of the x axis in the Time Domain result display on and off Suffix n 1 n Parameters State ON Turns on automatic scaling of the x axis OFF Turns on manual scaling of the x axis Example DISP TDOM X MODE OFF Turns on manual scaling of the x axis Manual operation See Configuring the Time Domain result display on page 75 DISPlay WINDow lt n gt TDOMain X SCALe OFFSet Time This command defines the origin of the x axis in the Time Domain result display The command is available when DISPlay WINDow n TDOMain X SCALe MODE has been turned off Suffix n 1 n Parameters Time numeric value Time offset relative to the first recorded sample when synchro nization has failed or the first sample of the synchronized data when synchronization was successful Default unit s Example DISP TDOM X MODE OFF DISP TDOM X OFFS 12us Defines an offset of 12 us Usage Query only Manual operation See Configuring the Time Domain result display on
166. instrument Very low frequencies in the input signal may be dis torted However some specifications require DC coupling In this case you must protect the instrument from damaging DC input voltages manually For details refer to the data sheet Remote command INPut COUPling on page 135 Configuring Inputs and Outputs Impedance For some measurements the reference impedance for the measured levels of the R amp S FSW can be set to 50 Q or 75 0 75 Q should be selected if the 50 Q input impedance is transformed to a higher impe dance using a 75 O adapter of the RAZ type 25 O in series to the input impedance of the instrument The correction value in this case is 1 76 dB 10 log 750 500 Remote command INPut IMPedance on page 136 Direct Path Enables or disables the use of the direct path for small frequencies In spectrum analyzers passive analog mixers are used for the first conversion of the input signal In such mixers the LO signal is coupled into the IF path due to its limited isolation The coupled LO signal becomes visible at the RF frequency 0 Hz This effect is referred to as LO feedthrough To avoid the LO feedthrough the spectrum analyzer provides an alternative signal path to the A D converter referred to as the direct path By default the direct path is selected automatically for RF frequencies close to zero However this behavior can be deactivated If Direct Path is set to Off the spectrum analyzer
167. jacent channel power Lower Channel Upper Channel For more information on configuring the ACP measurement see chapter 3 14 Config uring Adjacent Channel Power ACP Measurements on page 63 Remote command Configuration chapter 5 6 13 Configuring ACP Measurements on page 163 Result query CALCulate lt n gt MARKer lt m gt FUNCtion POWer RESult on page 163 AM AM The AM AM result display shows nonlinear effects of the DUT It shows the amplitude at the DUT input against the amplitude at the DUT output The ideal AM AM curve would be a straight line at 45 However nonlinear effects result in a measurement curve that does not follow the ideal curve When you drive the amplifier into saturation the curve typically flattens at high input levels The width of the AM AM trace is an indicator of memory effects the larger the width of the trace the more memory effects occur The AM AM Curve Width is shown in the numerical Result Summary Both axes show the power of the signal in dBm You can analyze the AM AM characteristics of the measured signal and the modeled signal Measured signal Shows the AM AM characteristics of the DUT The software uses the reference signal in combination with the synchronized mea surement signal to calculate a software model that describes the characteristics of the device under test The measured signal is represented by a colored cloud of values The cloud is based on the record
168. ker position on the x axis The unit depends on the result display Range The range depends on the current x axis range Example CALC MARK2 X 1 7MHz Positions marker 2 to frequency 1 7 MHz Manual operation See Marker Position X value on page 71 CALCulate lt n gt MARKer lt m gt Y This command queries the position of a marker on the y axis If necessary the command activates the marker first To get a valid result you have to perform a complete measurement with synchroniza tion to the end of the measurement before reading out the result This is only possible for single measurement mode See also INITiate lt n gt CONTinuous on page 99 Return values lt Result gt Result at the marker position Example INIT CONT OFF Switches to single measurement mode CALC MARK2 ON Switches marker 2 INIT WAI Starts a measurement and waits for the end CALC MARK2 Y Outputs the measured value of marker 2 Usage Query only Analyzing Results 5 7 2 3 Positioning Markers CAL Culate nz DEL Tamarkercmz M AimumlEEFT eene nn nennen 178 CAL Culate nz DEL TamarkercmzMAximumNENT esee enean nni 178 CALOCulate n DELTamarker m MAXimum PEAK esee 178 CAL Culate nz DEL Tamarker mzM Aimum RICH 178 CALCu latesn gt DEL Tamatkersm gt MINIMUM LEF T ain NENNEN AE en 179 CAL Culate nz DEL TamarkercmzMiNimumNENT nennen nnns nnns 179 CALOCulate n DELTamarker m MlNimum PEAK ces
169. l It is available for the data recorded on the RF input and both baseband inputs I and Q channels Note that the Spectrum FFT of the and Q channel are only available when parallel baseband capture has been turned on The Spectrum FFT result shows the signal level in the spectrum around the center fre quency The unit is dBm In case of the RF spectrum you can display the spectrum of the measured signal and the reference signal In the best case the measured signal has the same shape as the reference signal 4 Spectrum FFT 1 Meas 2 Mode 3 Ref 49 951172 MHz Remote command Selection RF LAY ADD RFS Selection I LAY ADD ISP Selection Q LAY ADD QSP Result query TRACe n DATA on page 102 Time Domain The Time Domain result display shows the signal characteristics over time It is similar to the Power vs Time and Magnitude Capture result displays in that it shows the signal characteristics over time However it delibaretly shows only a very short period of the signal You can thus use it to compare various aspects of the signal especially the timing of the displayed signals in a single result display Measured signal Trace 1 shows the characteristics of the measured signal over time The data should be the same as the results shown in the Magnitude Capture RF result dis play In the best case the measured signal is the same as the reference signal Modeled signal Trace 2 shows the characteri
170. l default or vice versa Remote command CONFigure MODeling STATe on page 159 CONFigure MODeling SEQuence on page 158 Selecting the degree of the polynomial In addition to the type of curve you can also select the order of the polynomial model The order of the model define the degree complexity and number of terms in the poly nomial model In general a polynomial of the N degree looks like this y nt AyX AX anx The degree of the model is defined by N as an index or exponent The higher the order the more complex the calculation and the longer it takes to calculate the model Higher models do not necessarily lead to better fitting model curves Note that the nonlinear effects consume an additional bandwidth proportional to 2 times the number of odd factors in the polynom excluding the linear one Example If the signal bandwidth is 1 MHz and the highest degree is 5 the bandwidth of the resulting signal is increased by 2 times 2 because there are the variables a3 and as times 1 MHz which are 4 MHz and leading to a total signal bandwidth of 5 MHz 1 MHz 4 MHz The configured recording bandwidth must be at least 5 MHz to record all nonlinear effects generated by the DUT Tip To select several polynomial degrees that should be applied you can either Define a range of degrees e g 0 5 in that case the application applies all degrees in that range e Define a set of individual degrees only e
171. l or horizontal position of the splitter as a fraction of the screen area without channel and status bar and softkey menu The point of origin x 0 y 0 is in the lower left corner of the screen The end point x 100 y 100 is in the upper right cor ner of the screen See figure 5 1 The direction in which the splitter is moved depends on the Screen layout If the windows are positioned horizontally the splitter also moves horizontally If the windows are positioned vertically the splitter also moves vertically Range 0 to 100 Example LAY SPL 1 3 50 Moves the splitter between window 1 Frequency Sweep and 3 Marker Table to the center 5096 of the screen i e in the fig ure above to the left Example LAY SPL 1 4 70 Moves the splitter between window 1 Frequency Sweep and 3 Marker Peak List towards the top 70 of the screen The following commands have the exact same effect as any combination of windows above and below the splitter moves the splitter vertically AY SPL 3 2 70 AY SPL 4 1 70 AY SPL 2 1 70 LAYout WINDow lt n gt ADD lt Direction gt lt WindowType gt This command adds a measurement window to the display Note that with this com mand the suffix lt n gt determines the existing window next to which the new window is added as opposed to LAYout ADD WINDow for which the existing window is defined by a parameter To replace an existing window use t
172. le for result displays that plot any kind of level values on both axes for example the AM PM result display Scaling the x axis automatically ee 77 Sealing the Eu EE 78 Scaling the x axis automatically By default the application scales the x axis in all diagrams automatically gt Auto ON Automatic scaling tries to obtain the ideal scale for the current measurement results The application adjusts the scale each time the results change Scaling the Y Axis You can also force an automatic scaling of the x axis at any time with the Auto Scale Once function When you select this function the application scales the x axis even if the results have not been changed Remote command DISPlay WINDow lt n gt TRACe lt t gt X SCALe AUTO on page 186 Scaling the x axis manually Settings for manual scaling of the x axis become available when you turn automatic scaling off The application provides two methods to scale the x axis e Scaling according to minimum and maximum values The scale is defined by the values at the lower and upper end of the x axis Scaling according to the distance between two grid lines The scale is defined by the value range within two grid lines in the diagram gt per division The distance between grid lines refers to diagrams that are split into 10 divisions Remote command Minimum DISPlay WINDow lt n gt TRACe lt t gt X SCALe MINimum on page 187 Maximum DISPlay WINDow lt
173. lease refer to the R amp S FSW User Manual 3 4 5 3 4 6 Configuring Inputs and Outputs Configuring Outputs The Output tab of the Input Output dialog box contains settings to configure the various signal outputs available on the R amp S FSW The functionality is the same as in the Spectrum application For more information about the output functions please refer to the R amp S FSW User Manual Controlling a Signal Generator The Generator Setup tab of the Input Output dialog box contains settings to con trol the signal generator from within the R amp S FSW K18 A remote control connection between the R amp S FSW and the signal generator has to be established to be able to do SO Because a signal generator is mostly mandatory in the test setup these features make measurement configuration as easy as possible This way you can control both analyzer and generator from within the application without having to operate the two instruments to configure the measurement gt To access the generator setup settings proceed as follows In the Configuration Overview select the Input Output button and then the Generator Setup tab Input Source Frequency Amplitude Output Probes Generator Setup tor Details Generator IP Address Name RMS Level Serial Number Generator Level Offset b Firmware Version Attach to FSW Frequency Center Frequency Reference Frequency Path RF Path BB Segment Upl
174. lt eese 106 FETCh MACOCuracy IQOFfset MAXimum RESUIt esee 106 FETCh MACOCuracy IQOFfset MINimum RESUIt eee ecciesie esee enun 106 FETCh MACOCuracy IQOFfset CURRent RESuUIt cesse 106 FETCh MACOCuracy MERRor MAXimum RESUIt sse eren 107 FETCh MAGGCuracy MERRor MINImum RESult 222i dottore ntt eene cene 107 FETCh MACCuracy MERRoOr CURRent RESUlt 2 2 1i rcai ccena nete aea da daa 107 FETCh MACCuracy PERRO MAXimum RESU eene 107 FE TChM ACCuracv PER Ror MiNimumtRESuI neret 107 FETCh MAGCuracy PERROECURRenI RESult iicet nitent cr t rez oen 107 FETCh MACCuracy QERRor MAXimum RESUIt eene a n enitn 107 FE TChM ACGCuracv OERbRorMiNimumt RE Su 107 FEICh MACCuracy GERRoEGDRRent RESult ee ENEE 107 FETCh MACCuracy REVM MAXimumERESUlt niacin ra cesi aai 108 FETCH MACCuracy REVM MINimum RESU eene 108 FE TChM ACCuraevREVM CURbRentt RE GO 108 FETCh MACCuracy RMEV MAXimum RESUIt 2 2 eee ceiiseet eei e ees saeua ai 108 FE TChM ACCuracvRMENVMiNimumtRESuT nennen 108 FE TChMACCuraevRMENVCURbRenttREGOI enne 108 FETGCh MACQu racy SRERrer MAXimump RESult 2 dato catt po tait rette ite 109 FETCh MACCuracy SRERror MlNimum RESUIt eeieeeceeiie oniran 109 FETCh MAGCCuracy SRERrer CURRent RESult 1 anu rr
175. lt display in window 2 Usage Event LAY out WINDow lt n gt REPLace lt WindowType gt This command changes the window type of an existing window specified by the suffix lt n gt in the active measurement channel The result of this command is identical to the LAYout REPLace WINDow com mand To add a new window use the LAYout WINDow lt n gt ADD command Parameters lt WindowType gt Type of measurement window you want to replace another one with See LAYout ADD WINDow on page 91 for a list of available window types 5 5 5 5 1 Performing Amplifier Measurements Example LAY WIND2 REPL MTAB Replaces the result display in window 2 with a marker table LAY out WINDow lt n gt TYPe Queries the window type of the window specified by the index lt n gt For a list of possi ble window types see LAYout ADD WINDow on page 91 Example LAY WIND2 TYPE Response MACC Modulation accuracy Usage Query only Performing Amplifier Measurements e Performing Measurements cna siendo recen rein Ee EU 98 e Retrieving Graphical Measurement Resuhts AAA 102 e Retrieving NUMERIC Results cc 1i setenta rore dee tho euren det Seege 103 Performing Measurements You can include the Amplifier measurements in a sequence of measurements For a comprehensive description of commands required to do so please refer to the R amp S FSW User Manual INITIatesn 2G ON uer e tesi e etre eu eddie 98
176. lt n gt PTABle ITEM Item This command adds and removes results from the Parameter Sweep Table Suffix n 1 n Parameters State ON OFF RST All results are ON Parameters for setting and query Item Selects the result See the table at CONFigure PSWeep Z n RESult for a list of available parameters Example DISP PTAB ITEM RMS OFF Removes the RMS Power result from the Parameter Sweep Table DISPlay WINDow lt n gt TABLe ITEM Item State DISPlay WINDow lt n gt TABLe ITEM Item This command adds and removes results from the Result Summary Suffix n 1 n Note that you have to include the WINDow syntax element if the Result Summary is in a window other than window 1 Parameters State ON OFF RST All results are ON Parameters for setting and query Item Selects the result See the table below for a list of available parameters Example DISP TABL ITEM GIMB OFF Removes the Gain Imbalance result from the Result Summary DISP WIND2 TABL ITEM APAE would return e g T Analyzing Results SCPI parameter Result AMW AM Curve Width APAE Average PAE BBIV Baseband Input Voltage BBP Baseband Power BBQV Baseband Q Input Voltage CFIN Crest Factor In CFOU Crest Factor Out FERR Frequency Error GAIN Gain GIMB Gain Imbalance ICC Current IQIM UO Imbalanc
177. lts as a comma separated list EVMMinValue EVMMinX EVMMinY lt ACPMinCalue gt ACPMinX ACPMinY The unit depends on the result and parameters assigned to the x and y axis If a result hasn t been calculated the command returns NAN Example FETC PTAB ALL would return e g 0 244445 1e 007 30 0 246109 2e 007 30 21 9096 3e 007 3 etc Usage Query only FETCh PTABle ACP MAXimum X RESult FETCh PTABle ACP MAXimum Y RESult FETCh PTABle ACP MAXimum RESult FETCh PTABle ACP MINimum X RESult FETCh PTABle ACP MINimum Y RESult FETCh PTABle ACP MINimum RESult These commands query the result values for the ACP result as shown in the Parame ter Sweep Table Return values Results Example Usage Performing Amplifier Measurements numeric value For RESult Minimum or maximum result that has been measured For X RESult Location on the x axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the x axis CONFigure PSWeep X SETTing For Y RESult Location on the y axis where the mini mum or maximum result has been measured The type of value depends on the parameter you have selected for the y axis CONFigure PSWeep Y SETTing FETC PTAB ACP MAX would return e g 7 651 DBM Query only FETCh PTABIe ACP ACHannel lt n gt LOWer MAXimum X
178. mand SYSTem PRESet CHANnel EXECute on page 90 Specifics for The measurement channel may contain several windows for different results Thus the settings indicated in the Overview and configured in the dialog boxes vary depending on the selected window Select an active window from the Specifics for selection list that is displayed in the Overview and in all window specific configuration dialog boxes 3 2 Performing Measurements The Overview and dialog boxes are updated to indicate the settings for the selected window Performing Measurements Continuous Sweep RUN CONT e eeeesie enne binnen darn ada rna a eaa eaa aa dang 26 single Sweep RUN SINGLE Et etae eere partes Gere aeter tt enter nere e aec 26 Cote SIngle SWeBSD o tpe t tr t eee re D e ERE RE CH RENNES 27 Continuous Sweep RUN CONT After triggering starts the measurement and repeats it continuously until stopped This is the default setting While the measurement is running the Continuous Sweep softkey and the RUN CONT key are highlighted The running measurement can be aborted by selecting the highlighted softkey or key again The results are not deleted until a new measurement is started Note Sequencer If the Sequencer is active the Continuous Sweep softkey only controls the sweep mode for the currently selected channel however the sweep mode only has an effect the next time the Sequencer activates that channel
179. mmand INPut FILTer YIG STATe on page 136 Input Connector Determines whether the RF input data is taken from the RF INPUT connector default or the optional BASEBAND INPUT I connector This setting is only available if the optional Analog Baseband Interface is installed and active for input It is not available for the R amp S FSW67 or R amp S FSW85 This feature is available when you turn off Enable Parallel BB Capture For more information on the Analog Baseband Interface R amp S FSW B71 see the R amp S FSW UO Analyzer and UO Input User Manual Remote command INPut CONNector on page 134 3 4 1 2 Configuring the Analog Baseband Input The analog baseband input input is available as a hardware option For measurements that also take into account the supply voltage and the current drawn by the PA the analog baseband inputs are required to measure the voltage baseband input Q and the current baseband input I Typically some power probes have to be connected to the baseband inputs for this purpose gt Select the BB Input Analog tab vertical from the Input Source dialog box Input Source Frequency Amplitude Output Generator Setup RF Input Enable Parallel BB Capture Input Config Differential BB Input Analog 2 EE High Accuracy Timing Trigger Baseband RF R amp S FSW FORD R amp S FSW Back BASEBAND INPUT 50 C Use Link Cable to Use Trigger Input 3 Connect Trigger Input 1 if you want to use and Trigger Inp
180. mum RESult FETCh PTABle CFACtor MAXimum X RESult FETCh PTABle CFACtor MAXimum Y RESult FETCh PTABle CFACtor MAXimumY RESUIE 1 56 tnt ete terno then eerie rennen FETCh PTABIE CFACtORMINIMUMEXERES E FETCRh PTABIe CFACtor MINimum Y RESUlt nort trt tn tem men tren tn FETCh PTABlIe CFACtor MINimum RESUlt i n iier tu tr ete tern nnn then paene itus 122 FETCh PTABle EVM MAXimum X RESult FETCh PTABle EVM MAXimum Y RESult FETCh PTABIe EVM IMAXim mp RESUlt ni iion e etuer ern ette oneri ttr ENER EE FETCH PIABIE EVM MINIMUM EX RESUME uere aen rn nator rns er ertet ra EO XH Fi SE re eere deoa FETCR PTABIe EVM MINimutm Y RESUlt ont trn t tern rrr rte en gene FETCh PTABIe EVMEMINim mpRESult uaioa tinet int entr rne re ert e ier 123 FETCh PTABIe GAIN MAXImum X RESU a cesso nrc nara rete eorr eo ntn h E Xon eni NENE FETCRh PTABIe GAIN MAXimum Y RESUlt orte hr ipee t rr tnn tren FETCh PTABle GAIN MAXimump RESUIt 3 5c enti nth trae tior ttes FETCh PTABle GAINIMINimum X IRESUlt seccciscunci penne rai eue cr er eerta br a Ey HF inge o cere deoa FETCRh PTABIe GAIN MINimum Y RESUlt trn tnr iaaa avia FETCh PTABle GAIN MINimum RESult FETCH PIABIEICE MAXIMUMEX RESUIE sis cssseccoscevent oer hort Ear rper Eon co eek oer rcu eae tenete FETCRh PTABIe ICC MAXimum Y RESUIt cierre tnnt ente eene rente FETCh PTABIe ICC MAXimumbp RESUIt
181. n 154 GONFigure EVALuation S TOP E 154 GONFigure GENerator EXTermnal ET 142 CONFigure GENerator EXTernal ROSCillator LEDState o oo eee eee cen e eee a 142 GONFigure GENerator FREQuency CENTTer 2 rient rena tht ctadsnecostrestersabsarsateveansecapananstiasiees CONFigure GENerator FREQuency CENTer LEDState CONFigure GENerator FREQuency CENTer SYNC STATe essen enne GONFigure GENerator IPConnection ADDRSeSS 5 tre ttr rtt rne erc rre Fe rc CONFigure GENeratorlP eelere HR 144 GONFigur GENerator POWerLEVEl tnt ttr trn rn eniro c en apnd ea e n ERR RN EE 144 GONFigure GENerator POWer EEVel bEDState 1 irren ec ren creen 144 GONFigure GENerator POWer EEVelOEES6L E 145 GONFigure GENerator POWer LEVel OFFSet LEDState aeterne nennen 145 GONFigure GENerator SEGMBnt 1 er tnter eren cet err ira Fe eee re cie d 145 GONFigure GENerator SEGMentLDEBSt ate rrr error trente een db EEGENEN epe gea 146 GONFigure GENerator SETTings UP Date terret rre nh rr rr sa eai CONFigure GENerator TARGet PATH BB GONFigure GENeratorsEARGeCPATEL RE rtr ret p be eva eye ku Hx Lee ERES Sen S eee NER XXV E SE EENS GONFigure MODeling AMAM ORBDBr eo tno n repete rene eee n e erp RR TENER GONFigure MODeling AMPM ORBDJBr rrt tore tr ct nr hr etin rere reo ha cr ree a eaa CONFIOUe MODEMO Boedo GCONFigure MObDeling N
182. n gt TRACe lt t gt X SCALe MAXimum on page 186 Distance DISPlay WINDow lt n gt TRACe lt t gt X SCALe PDIVision on page 187 4 6 Scaling the Y Axis The R amp S FSW K18 allows you to customize the scale of the y axis in graphical result displays By default the application automatically scales the y axis based on the current results The scale changes when new measurement results are available When you change the scale manually the changes are shown in the diagram next to the settings gt To access scaling functionality proceed as follows e Inthe Configuration Overview select the Result Configuration button and then the Y Scaling tab e Press the MEAS CONFIG key select the Result Config softkey and then the Y Scaling tab e Press the AMPT key and then select the Scale Config softkey Scaling the Y Axis Marker Settings Display Settings X Scaling Y Scaling Automatic grid scaling Auto Auto Scale Once Scaling according to min and max values Max 20 09 Min 20 0 Scaling according to reference and per div Per Division 4 0 RGAE 100 0 9 o Ref Value 20 09 Scope of the scaling Scaling is applied only to the result display that you have selected from the Specifics for dropdown menu at the bottom of the dialog box e Cael 3 Spectrum FFT In this case the scale is applied to the Spectrum FFT result display Scaling the y
183. n in the AM PM result display Suffix lt n gt 1 n Parameters Unit DEG Phase displayed in degrees RAD Phase displayed in radians Example CALC UNIT ANGL DEG Shows the phase results in degrees Manual operation See Configuring the AM PM result display on page 76 CONFigure PSWeep Z lt n gt RESult Result This command selects the result type displayed on the y axis of the paramater sweep diagram Suffix n 1 n Parameters Result See table below for supported result types Example CONF PSW Z RES EVM Displays the EVM against two parameters in the Parameter Sweep result display Analyzing Results Manual operation See Selecting the result type displayed in the Parameter Sweep diagram on page 76 ACL1 ACP Adjacent 1 Lower ACP Adjacent Channel Power ACU1 ACP Adjacent 1 Upper AMWidth AM AM Curve Width CFACtor Crest Factor EVM EVM GAIN Gain ICC Current I cc PAE PAE PMWidth AM PM Curve Width RMS RMS Power VCC Voltage V_cc VICC Power V_cc _cc DISPlay WINDow lt n gt TDOMain X SCALe DURation Time This command defines the amount of data displayed on the x axis of the Time Domain result display The command is available when DISPlay WINDow n TDOMain X SCALe MODE has been turned off Suffix n 1 n Parameters Time numeric value Time that is displayed on the x axis beginn
184. n offset of 1 Configuring Amplifier Measurements CONFigure PAE ICHannel RESistor Resistance This command defines the characteristics of the shunt resistor used in the test setup Parameters Resistance numeric value Resistance in Ohm Example CONF PAE ICH RES 1 5 Defines a resistance of 1 5 Ohm CONFigure PAE QCHannel MULTiplier lt Multiplier gt This command defines a multiplier to take into account various effects resulting from the measurement equipment connected to the Q channel Parameters lt Multiplier gt lt numeric value gt Example CONF PAE QCH MULT 1 2 Defines a multiplier of 1 2 CONFigure PAE QCHannel OFFSet lt Offset gt This command defines an offset for the Q channel Parameters lt Offset gt lt numeric value gt Default unit No unit Example CONF PAE QCH OFFS 1 Defines an offset of 1 5 6 13 Configuring ACP Measurements CALCulate lt n gt MARKer lt m gt FUNCtion POWer RESUIt eceeeeeeeeeeeeeeeeeeeeeaeeaeeeaeeenenenenes 163 SENSe POWer AGCHannelAABNW 2 2 22 i torte aanraai aa divans 164 SENSe POWer ACHannel ACPalls ce crate tu heran nn ien e Rada n ke RR adanan ideaa 164 SENSe POWer ACHannel BANDwidth ACHannel esee nennen 165 SENSe POWer ACHannel BANDwidth CHANnel esses enne 165 SENSe POWer ACHannel SPACing ACHannel essen neret 165 CALCulate lt
185. nce signal in a waveform file on page 30 CONFigure REFSignal CWF LEDState This command queries the transmission state of the reference signal to the signal gen erator Available when you generate the reference signal with a waveform file Return values State GREen Transmission was successful GREY Unknown transmission state RED Transmission was not successful Example CONF REFS CWF FPAT C RefSignal wv CONF REFS CWF WRITE CONF REFS CWF LEDS would return e g GRE Usage Query only Manual operation See Designing a reference signal in a waveform file on page 30 CONFigure REFSignal CWF WRITe This command transfers a waveform file that contains a reference signal to a signal generator Example CONF REFS CWF FPAT C RefSignal wv CONF REFS CWF WRITE Transfers the reference signal to the generator Usage Event Configuring Amplifier Measurements Manual operation See Designing a reference signal in a waveform file on page 30 CONFigure REFSignal GOS BWIDth Bandwidth This command defines the bandwidth of the reference signal Parameters Bandwidth numeric value Default unit Hz Example CONF REFS GOS BWID 10MHZ Defines a reference signal bandwidth of 10 MHz Manual operation See Signal Bandwidth on page 32 CONFigure REFSignal GOS CRESt lt CrestFactor gt This command defines the crest factor of the reference signal Parameters lt CrestFacto
186. ng Amplifier Measurements T In a three dimensional diagram the z axis always shows the result The information on the other two axes is arbitrary and depends on the parameters you have selected for evaluation For a better readability the result values in the three dimensional diagram are represented by a colored trace low values have a blue color while high values have a red color Values between measurement point are interpolated Basically you can interpret the three dimensional diagram as follows example at a frequency of x Hz and a level of y the EVM has a value of z Parameter Sweep Table Parameter Sweep The parameter sweep table shows the minimum and maximum results for all available result types in numerical form For each result type the location where the minimum and maximum result has occurred is displayed Example Frequency 30 0 MHz 10 0 MHz A minimum EVM of 0 244 and a maximum EVM of 0 246 has been measured first and second row The minimum EVM has been measured at a frequency of 30 MHz and a output power of 0 dBm The maximum EVM has been measured at a frequency of 10 MHz and a output power of 0 dBm The following result types are evaluated in the Parameter Sweep Result EVM ACP ACP Adj Upper Lower RMS Power Gain Crest Factor Curve Width AM AM AM PM Voltage V cc Current I cc Power V cc cc PAE Remote command Description Error vector magnitude betw
187. ns automatic scaling of the x axis in graphical result displays on and off Suffix n 1 n t 1 n Parameters State OFF Selects manual scaling of the diagram ON Automatically scales the diagram when new results are availa ble ONCE Automaically scales the diagram once whenever required Example DISP TRAC X AUTO ON Scales the axis each time new results are available Manual operation See Scaling the x axis automatically on page 77 DISPlay WINDow lt n gt TRACe lt t gt X SCALe MAXimum Value This command defines the value at the top of the x axis Suffix n 1 n t 1 n Analyzing Results Parameters Value numeric value Default unit Depends on the result display Example DISP TRAC x AUTO OFF DISP TRAC x MIN 10DBM DISP TRAC x MAX 110DBM The x axis covers a level range of 100 dB Manual operation See Scaling the x axis manually on page 78 DISPlay WINDow lt n gt TRACe lt t gt X SCALe MINimum Value This command defines the value at the bottom of the y axis Suffix n 1 n t 1 n Parameters Value numeric value Default unit Depends on the result display Example DISP TRAC X AUTO OFF DISP TRAC X MIN 10DBM DISP TRAC X MAX 110DBM The x axis covers a level range of 100 dB Manual operation See Scaling the x axis manually on page 78 DISPlay WINDow lt n gt TRACe lt t gt X SCALe PDIVision Distance This c
188. nsation ADROop STATe essen 155 CONFioure Slchal ERbRor COMbensaton FOFtserl atel ereenn eeose reese nenene 155 CONFioure Slchal ERbRor COMbensatonJOlMbalancel STATel eneee e ennenen 155 CONFioure Slchal ERbRor COMbensaton JOOFtser fS AaTel anenee nenen eee eeee eene 155 CONFioure Slchal ERbRor COMbensaton GPRATelGTATel nenene nenene eerereesrersre 156 CONFigure SIGNal ERRor ESTimation ADRoop STATe seen 156 CONFigure SIGNal ERRor ESTimation FOFFset STATe eeeeeeeeene 156 CONFioure Slchal ERbRorEGTimatonjOiMbalancel GTATel nenen en ene eeeeeeeene 156 CONFigure SIGNal ERRor ESTimation IQOFfset STATe seen 157 CONFioure Slchal ERbRorEGTimaton GbRATelGTATel A 157 Configuring Amplifier Measurements CONFigure SIGNal ERRor COMPensation ADRoop STATe State This command turns compensation of the Amplitude Droop on and off Available when you turn on CONFigure SIGNal ERRor ESTimation ADRoop STATe Parameters State ON OFF RST ON Example CONF SIGN ERR COMP ADR ON Turns on error compensation CONFigure SIGNal ERRor COMPensation FOFFset STATe State This command turns compensation of the Frequency Offset on and off Available when you turn on CONFigure SIGNal ERRor ESTimation FOFFset STATe Parameters State ON OFF RST ON Example CONF SIGN ERR COMP FOFF ON Turns on error compensati
189. ntn a aE reb bn meo da nanie 97 LAY out WINDOWSA REMOVE Asset ete dd etna au i eraot NENNEN 97 LAYOUPWINDOWSDESREPLSC 2 212 Erro opes aciei pex ia ie Soae y POIs RESP SIM Q TIS RM PERI 2 RP Du RRE E 97 LAY Outi WINDOWSA TYPE TT 98 DISPlay FORMat Format This command determines which tab is displayed Parameters Format SPLit Displays the MultiView tab with an overview of all active chan nels SINGIe Displays the measurement channel that was previously focused RST SING Example DISP FORM SPL DISPlay WINDow lt n gt SIZE Size This command maximizes the size of the selected result display window temporarily To change the size of several windows on the screen permanently use the LAY SPL command see i AYout SPLitter on page 95 Parameters Size LARGe Maximizes the selected window to full screen Other windows are still active in the background SMALI Reduces the size of the selected window to its original size If more than one measurement window was displayed originally these are visible again RST SMALI Example DISP WIND2 LARG LAYout ADD WINDow lt WindowName gt lt Direction gt lt WindowT ype gt This command adds a window to the display in the active measurement channel This command is always used as a query so that you immediately obtain the name of the new window as a result To replace an existing window use the LAYout REPLace
190. o each active measurement will be performed once INIT SEQ IMM Starts the sequential measurements SYSTem SEQuencer State This command turns the Sequencer on and off The Sequencer must be active before any other Sequencer commands INIT SEQ are executed otherwise an error will occur Parameters lt State gt ON OFF 0 1 ON 1 The Sequencer is activated and a sequential measurement is started immediately OFF 0 The Sequencer is deactivated Any running sequential measure ments are stopped Further Sequencer commands INIT SEQ are not available RST 0 Example SYST SEQ ON Activates the Sequencer INIT SEQ MODE SING Sets single Sequencer mode so each active measurement will be performed once INIT SEQ IMM Starts the sequential measurements SYST SEQ OFF Performing Amplifier Measurements 5 5 2 Retrieving Graphical Measurement Results TRACES DATA eege na cca qu 102 TRACES FDATA A EE 102 TRA eps DATA 103 TRACe lt n gt DATA Trace This command queries the measurement results in the graphical result displays Usu ally the measurement results are either displayed on the y axis two dimensional dia grams or the z axis three dimensional diagrams Suffix n 1 n Selects the result window Query parameters Trace TRACE1 TRACE6 Selects the trace to be queried Note that the available number of traces depends on the result display Fo
191. oad all Settings to Generator State of operation Most settings have an LED that shows the state of the corresponding setting on the signal generator The LED is either grey green or red e Grey LED Configuration state unknown for example when you have not yet started the trans mission Green LED Configuring Inputs and Outputs Configuration has been successful Generator has been configured correctly e Red LED Configuration has not been successful Check if the connection between analyzer and generator has been established or if the IP address has been stated correctly Generator details The Generator Details contain information about the connected signal generator like the software version or the serial number of the generator Updating generator settings When you change the generator level or frequency in this dialog the application auto matically updates those settings on the generator When you use the Update Generator Setting Manually button you can force an update of all generator settings available in this dialog box Useful when you change the level or frequency on the generator itself In that case those settings remain the same in the R amp S FSW K18 To restore the original settings defined within the R amp S FSW K18 use that button and the generator settings will be restored Remote command CONFigure GENerator SETTings UPDate on page 146 Generator IP Address eiecti b uana t
192. oe bkn enia a RR anie La gk SEENEN 45 Generator RMS Level itti a eina rodea etra ER ERR PERDRE E 45 Attach to R amp S FSW EFrediefiy EE 46 eap x 46 Pathe P BEBO Slat eicere b rendir cedit cete Cu dr dla dr cunt eae al 46 Selecting a segment in a multi segment waveform le 46 Generator IP Address Defines the IP address of the signal generator connected to the analyzer via LAN If you are not sure about the IP address of your generator kindly ask your IT adminis trator if he can provide one Remote command CONFigure GENerator IPConnection ADDRess on page 143 CONFigure GENerator IPConnection LEDState on page 144 Generator RMS Level Defines the RMS level of the signal that should be generated When you define the RMS level here the signal generator is automatically configured to that level In addition you can define a level offset for example to take external attenuation into account Note that the level offset is a purely mathematical value and does not change the actual level of the signal at the RF output The level offset takes level offsets into account that occur before the signal has passed through the DUT usually an amplifier For level offsets occuring after the DUT define a level offset in the Amplitude menu of the signal analyzer Configuring Inputs and Outputs NOTICE Risk of damage to the DUT RMS levels that are too high may damage or detroy the DUT Make sure to keep an
193. of the DUT for example the EVM against two custom measurement parameters The results of this measurement are displayed in graphical and numerical form The Parameter Sweep is a good way to find for example the location of the ideal delay time of the RF signal and the envelope signal in case you are measuring an amplifier that supports envelope tracking or to determine the characteristics and behavior of an amplifier over different frequencies and levels For more information about supported parameters and how to set them up see Select ing the data to be evaluated during the Parameter Sweep on page 67 Parameter Sweep Diagram Parameter Sweep The parameter sweep diagram is a graphical representation of the parameter sweep results The result are either represented as a a two dimensional trace or as a three dimensional trace depending on whether you are performing a parameter sweep with one or two parameters In a two dimensional diagram the y axis always shows the result The displayed result depends on the result type you have selected The information displayed on the x axis depends on the parameter you have selected for evaluation for example the EVM over a given frequency range Values between measurement point are interpolated Basi cally you can interpret the two dimensional diagram as follows example at a fre quency of x Hz the EVM has a value of y User Manual 1176 9893 02 03 22 R amp S FSW K18 Performi
194. om one another Only the most important characteristics that you need to know when working with SCPI commands are described here For a more complete description refer to the User Manual of the R amp S FSW Remote command examples Note that some remote command examples mentioned in this general introduction may not be supported by this particular application 5 2 1 Conventions used in Descriptions Note the following conventions used in the remote command descriptions e Command usage If not specified otherwise commands can be used both for setting and for querying parameters If a command can be used for setting or querying only or if it initiates an event the usage is stated explicitely Parameter usage If not specified otherwise a parameter can be used to set a value and it is the result of a query Parameters required only for setting are indicated as Setting parameters Parameters required only to refine a query are indicated as Query parameters Parameters that are only returned as the result of a query are indicated as Return values e Conformity Commands that are taken from the SCPI standard are indicated as SCPI con firmed All commands used by the R amp S FSW follow the SCPI syntax rules e Asynchronous commands A command which does not automatically finish executing before the next com mand starts executing overlapping command is indicated as an Asynchronous command e Reset values RST User Manual 1176
195. ommand defines the distance between the horizontal grid lines in graphical result displays Available when you turn off automatic scaling with DISPlay WINDow lt n gt TRACe lt t gt X SCALe AUTO Suffix lt n gt 1 n t 1 n Parameters Distance numeric value Default unit Depends on the result display Example DISP TRAC X SCAL AUTO OFF DISP TRAC X PDIV 5DBM Defines a distance of 5 dBm between the grid lines Manual operation See Scaling the x axis manually on page 78 Analyzing Results DISPlay WINDow lt n gt TRACe lt t gt X SCALe UNIT This command queries the unit of the x axis Suffix lt n gt 1 n Selects the measurement window lt t gt irrelevant Return values lt Unit gt Unit of the x axis in the selected window Example DISP WIND4 TRAC X UNIT would return e g SEC Usage Query only DISPlay WINDow lt n gt TRACe lt t gt Y SCALe AUTO State This command turns automatic scaling of the y axis in graphical result displays on and off Suffix lt n gt 1 n t 1 n Parameters State OFF Selects manual scaling of the diagram ON Automatically scales the diagram when new results are availa ble ONCE Automaically scales the diagram once whenever required Example DISP TRAC Y AUTO ON Scales the axis each time new results are available Manual operation See Scaling the y axis automatically on page 79 DISPlay WINDow lt n gt TRACe lt t
196. on CONFigure SIGNal ERRor COMPensation IQIMbalance STATe State This command turns compensation of the UO Imbalance on and off Available when you turn on CONFigure SIGNal ERRor ESTimation IQIMbalance STATe Parameters State ON OFF RST ON Example CONF SIGN ERR COMP IQIM ON Turns on error compensation CONFigure SIGNal ERRor COMPensation IQOFfset STATe State This command turns compensation of the Sample Error Rate on and off Available when you turn on CONFigure SIGNal ERRor ESTimation IQOFfset STATe Parameters State ON OFF RST ON Configuring Amplifier Measurements Example CONF SIGN ERR COMP IQOF ON Turns on error compensation CONFigure SIGNal ERRor COMPensation SRATe STATe State This command turns compensation of the Sample Error Rate on and off Available when you turn on CONFigure SIGNal ERRor ESTimation SRATe STATe Parameters State ON OFF RST ON Example CONF SIGN ERR COMP SRAT ON Turns on error compensation CONFigure SIGNal ERRor ESTimation ADRoop STATe State This command turns estimation of the Amplitude Droop on and off Parameters State ON OFF RST ON Example CONF SIGN ERR EST ADR ON Turns on error estimation CONFigure SIGNal ERRor ESTimation FOFFset STATe State This command turns estimation of the Frequency Offset on and off Parameters State ON OFF
197. on compares the EVM against the frequency and the generator power In that case the application first performs a measurement on the first frequency for each generator output level in the defined range When this is done the measurement continues to measure all power levels on the second frequency and so on Frequency range 10 MHz to 20 MHz stepsize 1 MHz Output level range 10 dBm to 0 dBm stepsize 1 dB e 1st measurement 10 MHz with a generator output level of 10 dBm Ka e 11th measurement 10 MHz with a generator output level of 0 dBm e 12th measurement 11 MHz with a generator output level of 10 dBm SL e 22nd measurement 11 MHz with a generator output level of 0 dBm e nth measurement 20 MHz with a generator output level of 0 dBm The configuration you have made affects the number of measurement that will be per formed This also has an effect on the overall measurement time of the parameter Sweep gt To access the parameter sweep settings proceed as follows e Inthe Configuration Overview select the Measurement button and then the Parameter Sweep tab e Press the MEAS CONFIG key and then select the Meas Config softkey and then the Parameter Sweep tab R amp S9 FSW K18 Configuring Amplifier Measurements D PD PAEnvelope Supply ACP Settings Power Setting 3d Plot Display Parameter Configuration X Axis Y Axis Enable Setting Center frequency lt Setting Parameter Settings Param
198. onfiguring Amplifier Measlremients care tt net nto en tnnt errans 126 e Analyzing E 171 e Deprecated Remote Commands for Amplifier Measurements 192 Overview of Remote Command Suffixes The remote commands for the LTE Measurement application support the following suf fixes Suffix Description lt k gt Selects a limit line Irrelevant for amplifier measurements lt m gt Selects a marker lt n gt Selects a measurement window lt t gt Selects a trace R amp S9FSW K18 Remote Control Commands for Amplifier Measurements 5 2 Introduction Commands are program messages that a controller e g a PC sends to the instru ment or software They operate its functions setting commands or events and request information query commands Some commands can only be used in one way others work in two ways setting and query If not indicated otherwise the com mands can be used for settings and queries The syntax of a SCPI command consists of a header and in most cases one or more parameters To use a command as a query you have to append a question mark after the last header element even if the command contains a parameter A header contains one or more keywords separated by a colon Header and parame ters are separated by a white space ASCII code 0 to 9 11 to 32 decimal e g blank If there is more than one parameter for a command these are separated by a comma fr
199. order CONFigure MODeling AMAM CONFigure MODeling AMAM MORDer ORDer Deprecated Remote Commands for Amplifier Measurements Legacy command CONFigure MODeling AMPM MORDer Replaced by CONFigure MODeling AMPM ORDer Comment CONFigure MODeling ORDer CONFigure MODeling SEQuence FETCh POWer CURRent RESult FETCh BBPower CURRent RESult FETCh POWer MAXimum RESult FETCh BBPower MAXimum RESult FETCh POWer MINimum RESult FETCh BBPower MINimum RESult List of Commands ISENS a REF SIG TIME E 147 ISENS J FREQUENCY CENTE usato ioter reto oti Erbe une an sedi au v LP Up ue EET Pa Y Rea eec E IPEA SENSe IFREQu ency CENTer ST EB E SENSe JEREQ GDCV OFFSOL eai ette tte tene Do Duce Dea Ci dg Cus eade COEM S aes SENSe H POWer AGbannel AABYW EE SENSe POWer ACHannel ACPairs iis SENSe POWer ACHannel BANDwidth ACHannel essent SENSe POWer ACHannel BANDwidth CHANnel essent SENSe POWer ACHannel SPACing ACHannel sess ree reneeenre nre nnnnen SENSG ISWAPIGQu iunii nra metu etek ert aee epe LL patct pre ce tau ccrte tees seed Locus a aaa doce SENSE iude out ease SENSE lads oHm eege gees ENEE EES ES SENS6 SWEep TIME AU TO tcr ttd Edel tta t ee Dip dde cbr Mu CALCulatesns DEETa markersm AQEFF
200. ortion Digital predistortion DPD is one of the methods used to improve the efficiency of RF power amplifiers The R amp S FSW K18 features functionality to deliberately take digital predistortion into account There are several known models used to describe distortions This implementation focuses on the following two types of distortion e the AM AM amplitude to amplitude distortion and e the AM PM amplitude to phase distortion Requirements Using the predisortion functionality requires an R amp S SMW equipped with option R amp S SMW K541 gt To access the DPD settings proceed as follows e Inthe Configuration Overview select the Measurement button and then the DPD tab e Press the MEAS CONFIG key select the Meas Settings softkey and then the DPD tab R amp S9FSW K18 Configuring Amplifier Measurements Modeling DPD PA Envelope Supply ACP Settings Power Settings Parameter Swe Update DPD Tables on R amp S SMW Update e Shaping From Table DPD File Name DpdTable DPD Power Linearity Tradeoff 100 0 DPD Sequence AAV AM PM first AM AM e E AM PM Selecting the DPD shaping melted 3 t Eege 58 Selecting the order of model calculaton ccc ceeeecceeeeeenceeeeeeenaeeeeeeenaeeeeeeeenaeeeeeeeaas 58 DPD Power Lingatity TradeolF 2 n d node ice ort te ASS cere ESA 59 e Selecting the DPD shaping method The application provides several ways for DPD calculation or sh
201. ounts of data The ASCII character introduces the data block The next number indicates how many of the following digits describe the length of the data block In the example the 4 follow ing digits indicate the length to be 5168 bytes The data bytes follow During the trans mission of these data bytes all end or other control signs are ignored until all bytes are transmitted 0 specifies a data block of indefinite length The use of the indefinite for mat requires a NL END message to terminate the data block This format is useful when the length of the transmission is not known or if speed or other considerations prevent segmentation of the data into blocks of definite length Selecting the Application INSTIrument GREate DUPLical 2 2 terrre e eroe rein e o nan cenas ar qs Apc deen 87 INS Tragen REAStREPIAGG oiii idee ERENNERT ReiY a e RRURR 87 INS TUMMEN CREIS NEW DEE 87 INS T ment DELSE EE 88 NS Timer UST anaa a a a dE 88 NS bereede tere pareant Ease ze e aeai a Eanan Eaa EE ATA aAa ee 89 INS Tiumen Eet getut potete creta en codage euet A R 90 SYSTemiPRESetCHANrneIEEXEQGule 2 2 2 trnate un ruht I a utt ea ku y tpe ce RR 90 Selecting the Application INSTrument CREate DUPLicate This command duplicates the currently selected measurement channel i e creates a new measurement channel of the same type and with the identical measurement set tings The name of the new channel is the same as the copied channel
202. own in the Result Summary Return values Power numeric value Minimum maximum or current power depending on the com mand syntax Default unit dBm Example FETC POW INP MIN would return e g 9 39 Usage Query only Manual operation See Results to check power characteristcs on page 12 FETCh POWer OUTPut MAXimum RESult FETCh POWer OUTPut MINimum RESult FETCh POWer OUTPut CURRent RESult This command queries the signal power at the DUT output as shown in the Result Summary Performing Amplifier Measurements Return values Power numeric value Minimum maximum or current power depending on the com mand syntax Default unit dBm Example FETC POW OUTP MIN would return e g 7 198 Usage Query only Manual operation See Results to check power characteristcs on page 12 FETCh POWer P1DB CURRent RESult This command queries the 1 dB Compression Point as shown in the Result Summary Return values lt Level gt lt numeric value gt Current 1 dB Compression Point Default unit dBm Example FETC POW P1DB CURR would return e g ail 782 Usage Query only Manual operation See Results to check power characteristcs on page 12 FETCh POWer P2DB CURRent RESult This command queries the 2 dB Compression Point as shown in the Result Summary Return values Level numeric value Current 2 dB Compression Point Default unit dBm Example F
203. page 75 DISPlay WINDow lt n gt TDOMain Y SCALe NORMalise STATe State This command turns normalization of the results in the Time Domain result display on and off Suffix n 1 n Parameters State ON OFF 5 7 5 Analyzing Results Example DISP TDOM Y NORM ON Normalizes the results in the Time Domain result display to 1 Manual operation See Configuring the Time Domain result display on page 75 Scaling the Diagram Axes DiSblavlfWiNDow nzTR ACects MI SCALelAUlTO enne 186 DISPlay WINDow n TRACe t X SCALe MAXimum eeeses eene 186 DiSblavlfWiNDow nzTR ACectz XI SCALelMlNimum eee nene 187 DISPlay WINDow lt n gt TRACe lt t gt X SCALe PDIVISION een 187 DiSblavlfWiNDow nzTR ACects NI SCALelUNIT eene 188 DiSblavlfWiNDow nzTR ACectlSCALelAUlTO nennen 188 DiSblavlfWiNDow nzTR ACectlSCALelMANimum cece cece ee eeeeeeeeeeeeeeeeeeeeeeees 188 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe MINIMUM ceceeeee cee ee cece eee enn 189 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe PDIVISION ccccceeeeeeeeee cece eaeaeeeeeeeeeenenenenes 189 DISPlay WINDow n TRACe t Y SCALe RPOSition esee 189 DISPlay WINDow n TRACe t Y SCALe RVALue esses 190 DiSblavlfWiNDow nzTR ACects lt SCALelUNIT nennen 190 DISPlay WINDow lt n gt TRACe lt t gt X SCALe AUTO State This command tur
204. ponents in the test setup For valid measurement results you have to define the characteristics for those components Required components One way to measure the voltage is to use a probe The voltage is measured on the Q channel of the baseband input provided by the optional baseband hardware option One way to measure the current is to use a shunt resistor and another probe The cur rent is measured on the channel of the baseband input provided by the optional base band hardware option For both types of components you have to accurately define their characteristics and behavior Measuring current When using a shunt resistor to measure the current you have to define the resistance R of the shunt resistor you are using The resistance is a value with the unit O Configuring Power Measurements The test setup may also have additional characteristics that have to be taken into account for example those of passive probes You can take those into account via the multiplier The multiplier is a value without unit When you are using an active probe from Rohde amp Schwarz you do not have to change the multiplier because it is auto matically detected by the Amplifier application In addition you have to compensate the DC offset of active probes The DC offset is described by the offset value which differs depending on the probe you are using The offset value has to be measured Measuring voltage To measure the voltag
205. r Controls the output power of the signal generator e Envelope to RF Delay Controls the delay between the envelope and the RF signal on the signal genera tor Envelope Bias Controls the envelope bias on the signal generator You can define the scope of the measurement by adjusting the start and stop values for both parameters and assign a certain stepsize Based on these values the R amp S FSW K18 changes the generator setup after each individual measurement The second parameter is not mandatory You can turn it off with the Y Axis Enable function In that case the Parameter Sweep is represented in a two dimensional dia gram for example the EVM against the frequency Example When you define a level range from 0 dBm start value to 10 dBm stop value with a stepsize of 1 dB the Parameter Sweep would perform 11 measurement on a single frequency When you additionally define a frequency range between 10 MHz and 20 MHz and a stepsize of 1 MHz the total number of measurements would be 121 11 power level measurements on each of the 11 frequencies Remote command chapter 5 6 15 Configuring Parameter Sweeps on page 167 Synchronizing the levels of signal generator and analyzer When you sweep the output level of the generator make sure to synchronize the refer ence level of the analyzer and the RMS level of the generator to avoid damage to the RF input of the analyzer gt Couple FSx and SMx Level When you do so
206. r Measurements CONFigure GENerator TARGet PATH RF Path This command selects the signal path of the R amp S SMW used for RF signal generation Parameters Path A B Example CONF GEN TARG PATH RF A Selects RF path A to generate the signal Manual operation See Path RF BB on page 46 Configuring the Data Capture SENSe REFSig TIME ecce sacsesevansesevavesssavensteasaesseesacevansasenad 147 NEAN 147 IGENSelSuWEep LENG tette tette tente teet te tette std 148 E E ug LTE 148 SENSe SWEep TIME AUTO eccentric 148 TRAC STIO Elei MN 149 TRACE RR e 149 TRAGBIQISRATGUNU E 149 RR ee WE EE E E 150 TRACGHGIWBANGESTA Pel e 150 SENSe REFSig TIME This command queries the length of the reference signal as shown in the Acquisition dialog box Return values Duration numeric value Default unit s Example REFS TIME would return e g 0 00125 Usage Query only Manual operation See Configuring the measurement time on page 49 SENSe SWAPiq State This command inverts the and Q branches of the signal Parameters State ON OFF Example SWAP ON Inverts the and Q channel Manual operation See Inverting the Q branches on page 50 Configuring Amplifier Measurements SENSe SWEep LENGth Samples This command defines the capture length Thi
207. r example the Magnitude Capture result display only supports TRACE1 while the Time Domain result display supports TRACE1 to TRACE6 Return values lt Result gt lt numeric value gt Values of the captured samples in chronological order Example TRAC DATA TRACE1 Queries the results displayed on trace 1 Usage Query only Manual operation See AM AM on page 14 See AM PM on page 15 See Gain Compression on page 16 See Magnitude Capture RF and Q on page 16 See PAE vs Input Power PAE vs Output Power on page 17 See PAE vs Time on page 17 See Power vs Time on page 18 See Raw EVM on page 18 See Error Vector Spectrum on page 19 See Specirum FFT on page 20 See Time Domain on page 20 See Vcc vs Icc on page 22 TRACe lt n gt DATA X Trace This command queries the measurement results as displayed on the x axis in the graphical result displays Suffix n Query parameters Trace Return values Result Example Usage Performing Amplifier Measurements 1 n Selects the result window TRACE1 TRACE6 Selects the trace to be queried Note that the available number of traces depends on the result display For example the Magnitude Capture result display only supports TRACE1 while the Time Domain result display supports TRACE1 to TRACE6 lt numeric value gt X axis values of the captured samples in chronological order TRAC DATA TRACE1 Queries the result
208. r gt lt numeric value gt Default unit dB Example CONF REFS GOS CRES 15 Defines a crest factor of 15 dB Manual operation See Crest Factor on page 33 CONFigure REFSignal GOS DCYCle lt DutyCycle gt This command defines the duty cycle of a pulsed reference signal Parameters lt DutyCycle gt lt numeric value gt Default unit Example CONF REFS GOS DCYC 75 Defines a duty cycle of 75 Manual operation See Pulse Duty Cycle on page 33 CONFigure REFSignal GOS LEDState This command queries the transmission state of the reference signal to the signal gen erator Available when you configure the reference signal within the R amp S FSW K18 Configuring Amplifier Measurements Return values State GREen Transmission was successful GREY Unknown transmission state RED Transmission was not successful Example CONF REFS GOS WRITE CONF REFS GOS LEDS would return e g GRE Usage Query only Manual operation See Designing a reference signal within the R amp S FSW K18 on page 31 CONFigure REFSignal GOS NPOSition Frequency This command defines the offset of a notch relative to the center frequency in the refer ence signal Parameters Frequency numeric value Default unit Hz Example CONF REFS GOS NPOS 10000 Defines a notch offset of 10 kHz Manual operation See Notch Position on page 33
209. r only RST 50 Default unit Example CONF MOD NPO 100 Calculates the model based on 50 points Manual operation See Defining the modeling range on page 56 CONFigure MODeling SEQuence lt State gt This command selects the sequence in which the models are calculated 5 6 11 Configuring Amplifier Measurements Parameters State AMFirst Calculates the AM AM model before calculating the AM PM model PMFirst Calculates the AM PM model before calculating the AM AM model RST AMFirst Example CONF MOD SEQ AMF Calculates the AM AM model first Manual operation See Turning system modeling on and off on page 55 CONFigure MODeling STATe State This command turns system modeling on and off Parameters State ON OFF RST OFF Example CONF MOD ON Turns on system modeling Manual operation See Turning system modeling on and off on page 55 Applying Digital Predistortion CONFigune DP DIAMAMESTAV E 159 GCONFigure DP DFAMPME STAT 6 iiti A AA dex REF AR RR TERR RMRRUAR 160 CONFigure DPD AMXM STATe eiseeieeeeeee eene n nena nena n nh sn sa setenta ants as nsa sa sana essa sas n sn 160 CONFOUrE EE Eengel ee n rr ee xta eech 160 GONFiguir DP BHzIz AIU are 160 GONFigure DPD SHAPIngI ee 161 CONFiguire DPD TRADOFf 5 2 rre irre E te rrr dn rr eae dre Parse Phat iaid 161 CON Lee ERR 161 GONFig ure DPD UPDate t EDStale citer e tage
210. rator power Parameter SWCD 5 tenet rr nete dts 67 Green Bat ie ad ted s d oM Mes catulus 16 ED at E 28 44 Grey zip 28 44 H lee WE a E 8 High pass filter PREM OG ena acest he antetnaecdtis N 135 RF Tue IO 36 l Jelli UO inversion IF output see R amp S FSW User Manual sess 44 Impedance Elei 136 Setting 5 edes ced be tera petu seer 36 42 Input Analog baseband 5 rettet Connector remote Coupling Jute de Coupling remote cetero tentia Full Scale level ioter tbi ertet tiere tete Level characteristics tnter nen 40 Parallel data capture 530 Eeer sudo Source 2s 34 IAStANATION WEE 7 IP address muere ca eA ncaa 45 K Keys Peak Search RUN CONT RUN SINGLE L LAN connection see Generator setup nussii tenet de tn ER n 28 LED el m 28 44 Level offset 45 Level range 2250 Eet leie WEE 36 M MarkertO Frae n rire cero creer eee E TREE 72 El 70 Assigried race cert ener a ciere I2 Deactivating we Delta markers vest Minimum 13 Next minimum 13 Next peak au Ix hp 73 E le eT 71 Querying position remote 177 Stale iban DER el Table wed 2 Type aadA DEVAS aasa a a EENG 71 Maximizing Windows EMO inci cote re rtc des 91 Maximum bandwidth vs Measurement bandwidth eesssssss 8 48 AGP aS 63 Measurement channel Creatingremot
211. rdware Parameters State ON OFF RST OFF Example INP GAIN STAT ON Switches on 30 dB preamplification Usage SCPI confirmed 5 6 5 Configuring Amplifier Measurements Manual operation See Preamplifier on page 42 Controlling a Signal Generator CONFigure GENerator EXTernal ROSCillator eese 142 CONFloure GENerator ExTemalROGcClatorLEDGtate se eseeee eese esesere nener rn neren nenne 142 CONFigure GENerator F REQuency CENTSr iiia Lecce daa ccena innnan a e aee eR a aeu 143 CONFloure GENeratorFRtOuencv CENTerLEDGtate seen 143 CONFloure GENerator FR Ouencv CENTer SNCT STATel nenene nenene eeeerererereeeo 143 CONFigure GENerator IPConnection ADDRess esses 143 CONFloure GENeratorJPCGonnechon LED tate entem 144 CONFloure GENerator POuWerLEVel ette ene nennen nnns nnne nnn nnns 144 CONFloure GENerator POuWerL EVelLED tate eene 144 CONFigure GENerator POWerLEWVel OFFSelt ee oiseau e d ua cos Dac d a du cda 145 CONFloure GENerator POuWerLEVel Otter LtEDGtate terere terere rererersrersenen 145 CONFigure GENerator SEGMent sessi nnne ener tree rentrer rrr nr nnne 145 CONFigure GENerator SEGMentLEDStale ecce eise rende aba i a 146 GONFigure GENerator SETTings UPDalte 2 2 ioter isnt ic io eee Lose ey ianiai 146 CONFloure GENerator TARGet PDATH DR 146 CONFigure GENerater TARGGEEPA TEE e ides tdi eu ie ieee a
212. reo EES SEENEN EE 123 FETCh iPTABIe ICOC MAXIm m X RESwUlI 2 urere ENNER epp cene Rr nne 124 FETCHIPTABIEICC MAXIMUM AR TEE 124 FETCHIPTAB eI CE MAXimUMPIRES DE 124 ai lr lee MINIMUM EE E 124 FETChiPTABleJCC MINIMUM Y DRESUI orti ot dtt tte dtt ces 124 SE a RTE ICC MINIMUM RE 124 FETCH PTABlE ul BE 124 FETChPBITABlePDAE MANimum vlTRESGO nest 124 FEIChIPTABIS PAE MAXI IUD RESUME tr etre e e a e et ote cet 125 FETCHPTABIe PAE MINIMUM X PRESU 5 2 23 222 22 5 22 2 12 2822 Pete rp a re ccie Deep EES 125 FETGhIPTABIE PAE MINimum Y ISESull 222 2 itr t rtr Rene tee ant Inch 125 SN REENEN Oo Div TE 125 FETCh PTABIe RMS MAXimtm XDRESUII 2 oiii tuii ii coca eoe aei sete AER 125 Performing Amplifier Measurements FETCKRPTABIERMS MAXIMUM Y RESUME ua ideae e rcnt currite adt eene seen ene 125 FETGI PTABIG IRMS MAXimutri RESul 2 EES rae Ere Rr erede RR geg 125 FETChPBTABleRMS MiNimum SIRESO nennen eene 125 FETCHP TAB RMS MNimuni d EC BEE 125 IS REN a REES all E CC KEE 125 el lei ee en OR APRE SU E 126 FETCh PTABIe VCC MAXimum Y RESult sensns 126 FETGhiPTABIe VGCIMAXImum RESUlt 22522 222 222 22222 n EEN 126 PETER Wou mere geesde Eed EES aner 126 FE TChPBITABlevCC MiNmmum vTRE GO 126 FEIChIPTABIe VOO MINim tm GT KE 126 FETCh PTABle RESult ALL This command queries all numerical results shown in the Parameter Sweep Table Return values Results numeric value Resu
213. rker is not yet active the command first activates the marker Usage Event Manual operation See Peak Search on page 73 CALCulate lt n gt MARKer lt m gt MAXimum RIGHt This command moves a marker to the next lower peak The search includes only measurement values to the right of the current marker posi tion Usage Event CALCulate lt n gt MARKer lt m gt MINimum LEFT This command moves a marker to the next minimum value The search includes only measurement values to the right of the current marker posi tion Usage Event CALCulate lt n gt MARKer lt m gt MINimum NEXT This command moves a marker to the next minimum value Usage Event Manual operation See Search Next Minimum on page 73 CALCulate lt n gt MARKer lt m gt MINimum PEAK This command moves a marker to the minimum level If the marker is not yet active the command first activates the marker Usage Event Manual operation See Search Minimum on page 73 CALCulate lt n gt MARKer lt m gt MINimum RIGHt This command moves a marker to the next minimum value The search includes only measurement values to the right of the current marker posi tion Usage Event Analyzing Results 5 7 3 Configuring Numerical Result Displays DiSblavlfWiNDow nztPBTABleTTEM nnne nn nnns nen nn entre nnne 181 bDISPlayDWINDowsmnsLABESTTEM ione edere a Ert ata cta e entr eee nins 181 DISPlay WINDow lt n gt PTABle ITEM Item State DISPlay WINDow
214. roduction oerte riii ituri ital sine i cra iua aane nien aan D ERR Rs 82 5 2 1 Conventions used in Descrptons mener 82 5 2 2 Long and Short Fom emen nennen nennen nnne nnne 83 5 2 8 Numeric Gufftves esent nen en trennen rsen eterne en 83 5 2 4 Optional kevworde nennen a ARA VN nnn nennen nnn nennen 83 5 2 5 Alternative kevworde ne enne en nennen rennen nennen 84 5 26 SCPI Parameter ccsccccissceeccctssacceesecsaccescestageneceetasacceceeetaneeceectauensctetibeneseeensaneceeeeiaes 84 5 3 Selecting the Applicatio ms sicciccsiccsccssssceccecescetsccesessannnncteecessedesvesassonssteecercesrenesesvenseeans 86 5 4 Configuring the Screen Layout cceecccsessseneeeeeeeeseeeeseeeeeeeeeseeeseeeesseeeeeseneeeseeeeeees 90 5 5 Performing Amplifier Measurements eese nnne 98 5 5 1 Performing Measurement eene nnne 98 5 5 2 Retrieving Graphical Measurement Results 102 5 5 3 Retrieving Numeric Results eene eene nnns 103 5 6 Configuring Amplifier Measurements cene 126 5 6 1 Designing a Reference Gional eene 127 5 6 2 Selecting and Configuring the Input Source 134 5 6 3 Configuring the Freguency enm enne nn nennen nennen 137 5 6 4 Defining Level Characheristce eee eene 138 5 6 5 Controlling a Signal Generator 142 5 6 6 Configuring the Data Capture 147 5 6 7 Synchronizing Measurement Data 151 5 6 8 Defining the Evaluation Range 153 5 6 9 Estimating and Compensating Signal Emors e
215. s command is available when SENSe SWEep TIME AUTO has been turned off Note that when you change the capture length the capture time is adjusted automati cally to the new capture length Parameters Samples numeric value integer only Default unit Samples Example SWE TIME AUTO OFF SWE LENG 1000000 Defines a capture length of 1 million samples Manual operation See Configuring the measurement time on page 49 SENSe SWEep TIME Time This command defines the capture time This command is available when SENSe SWEep TIME AUTO has been turned off Note that when you change the capture time the capture length is adjusted automati cally to the new capture time Parameters Time numeric value Default unit s Example SWE TIME AUTO OFF SWE TIME 10MS Defines a sweep time of 10 ms Manual operation See Configuring the measurement time on page 49 SENSe SWEep TIME AUTO State This command turns automatic selection of an appropriate capture time on and off When you turn this feature on the application calculates an appropriate capture time based on the reference signal and adjusts the other acquisition settings accordingly Parameters State ON OFF RST ON Example SWE TIME AUTO ON Selects automatic adjustment of the capture time Manual operation See Configuring the measurement time on page 49 Con
216. s displayed on trace 1 Query only TRACe lt n gt DATA Y lt Trace gt This command queries the measurement results as displayed on the y axis in result displays with three axes for example the Parameter Sweep Suffix lt n gt Query parameters lt Trace gt Return values lt Result gt Example Usage 1 n Selects the result window TRACE1 TRACE6 Selects the trace to be queried Note that the available number of traces depends on the result display numeric value Y axis values of the captured samples in chronological order TRAC DATA TRACE1 Queries the results displayed on trace 1 Query only 5 5 3 Retrieving Numeric Results e Retrieving General Numeric Results eeeeeeeeeneeenennnenn enne 104 e Retrieving Results of the Result Summary sss 104 e Retrieving Results of the Parameter Sweep Table 116 5 5 3 1 5 5 3 2 Performing Amplifier Measurements Retrieving General Numeric Results FEEDS Eenelter eene ras pe ee AER tax vi naa PV ni eR ea rA FRE tur Ra IER dee 104 FETCh TTF CURRent RESult This command queries the Trigger to Frame result as displayed in the channel bar Return values Time numeric value Default unit s Example FETC TTF CURR would return e g 0 00015700958 Usage Query only Retrieving Results of the Result Summary RENOMI REI 104 Retrieving the Modulation ACCUFB
217. s or removes neighboring channels to the left and right side of the Tx channel Note that the first adjacent channel on either side of the transmission channel is labeled Adjacent Channel in the ACP result display while the subsequent neighbor ing channels are labeled Alternate Channel lt x gt All neighboring channels have the same basic configuration bandwidth and channel spacing The Adjacent Channel Bandwidth defines the bandwidth of the neighboring channels The Channel Spacing is the distance between the center frequency of one adjacent channel to the center frequency of the next adjacent channel Remote command Number of channels SENSe POWer ACHannel ACPairs on page 164 Bandwidth SENSe POWer ACHannel BANDwidth ACHannel on page 165 Channel spacing SENSe POWer ACHannel SPACing ACHannel on page 165 3 15 Configuring the Parameter Sweep The Parameter Sweep is a measurement that allows you to compare a result that you can select arbitrarily against two other parameters The advantage of the Parameter Sweep is that it controls the signal generator and the analyzer and automatically changes the signal characteristics for example the frequency without you having to do those changes manually In addition it combines the results in a single and well arranged diagram and or numerical result display La Parameter Sweep Configuring the Parameter Sweep Example In the default state the applicati
218. selects the segment in a multi waveform file that should be uploaded to the signal generator Parameters Segment numeric value integer only Range Depends on the number of segments in the wave form file RST 0 Configuring Amplifier Measurements Example CONF GEN SEGM 3 Selects the 3rd segment of a waveform file Manual operation See Selecting a segment in a multi segment waveform file on page 46 CONFigure GENerator SEGMent LEDState This command queries the state of transmission of a multi waveform segment Return values State GREen Transmission was successful GREY Unknown transmission state RED Transmission was not successful Example CONF GEN SEGM LEDS would return e g RED Usage Query only Manual operation See Selecting a segment in a multi segment waveform file on page 46 CONFigure GENerator SETTings UPDate This command updates the generator settings as defined within the R amp S FSW K18 Usage Event CONFigure GENerator TARGet PATH BB This command queries the signal path of the R amp S SMW used for baseband signal gen eration Note that the baseband path is always the same as the RF path selected with CONFigure GENerator TARGet PATH RF Return values Path A B Example CONF GEN TARG PATH BB would return e g A Usage Query only Manual operation See Path RF BB on page 46 5 6 6 Configuring Amplifie
219. side the diagram area 1 Parameter Sweep Freq vs P You can turn that off with the Display Min and Max feature Remote command CONFigure PSWeep Z n RESult on page 183 Scaling the X Axis 4 5 Scaling the X Axis The R amp S FSW K18 allows you to customize the scale of the x axis in graphical result displays By default the application automatically scales the x axis based on the current results The scale changes when new measurement results are available When you change the scale manually the changes are shown in the diagram next to the settings gt To access scaling functionality proceed as follows e Inthe Configuration Overview select the Result Configuration button and then the X Scaling tab e Press the MEAS CONFIG key select the Result Config softkey and then the X Scaling tab e Press the AMPT key and then select the Scale Config softkey Marker Settings Display Settings X Scaling Y Scaling Automatic grid scaling Auto Co SI Auto Scale Once Scaling according to min and max values Max 6 0 dBm Min 66 0 dBm Scaling according to per div Per Division 6 0 dBm Scope of the scaling Scaling is applied only to the result display that you have selected from the Specifics for dropdown menu at the bottom of the dialog box erelo 6 AM PM In this case the scale is applied to the AM PM result display Scaling the x axis in particular is availab
220. sisse 179 CAL Culate nz DEL Tamarker mz MiNimum RICH 179 GALCulatesmn MARKersm MAXIm tm LE FT ttis rotate EENS 179 CAL Culate nz M AbkercmzMANimumNENT eene ennn nas esnh snas nass n sean 179 CALOCulate n MARKer m MAXimum PEAK esses 180 CALCulatesn gt MARKer lt mi gt MAXIMUM Richt 180 CALCulate lt n gt MARKer lt em gt MINIMUM LEET 180 CAL Culate nz M Abkermz MiNimumNENT nenne seen nasse sni 180 CALCulate n MARKer m MlNimum PEAK eese enne 180 CAL Culate nz M bkermmz MiNimum BIG 180 co CALCulate lt n gt DELTamarker lt m gt MAXimum LEFT This command moves a delta marker to the next higher value The search includes only measurement values to the left of the current marker posi tion Usage Event CALCulate lt n gt DELTamarker lt m gt MAXimum NEXT This command moves a marker to the next higher value Usage Event Manual operation See Search Next Peak on page 73 CALCulate lt n gt DELTamarker lt m gt MAXimum PEAK This command moves a delta marker to the highest level If the marker is not yet active the command first activates the marker Usage Event Manual operation See Peak Search on page 73 CALCulate lt n gt DELTamarker lt m gt MAXimum RIGHt This command moves a delta marker to the next higher value The search includes only measurement values to the right of the current m
221. sition Bandwidth function Note that you also have to turn on automatic bandwidth selection in the Data Acquisi tion dialog box in order to adjust the measurement bandwidth to the ACP configura tion If you define the bandwidth manually make sure to take one that is large enough to capture all channels Otherwise measurement results will not be evaluated Make also sure that the R amp S FSW you are using can actually handle the bandwidth occupied by the transmission and adjacent channels For larger bandwidths one of the UO band width extensions might be necessary refer to the datasheet for a complete list of avail able bandwidth extensions Remote command SENSe POWer ACHannel AABW on page 164 User Manual 1176 9893 02 03 63 Configuring the Parameter Sweep Defining characteristics of the transmission channel The ACP measurement requires you to define various basic characteristics of the channels evaluated in the measurement For the transmission Tx channel you can define its bandwidth in the Tx Channel Bandwidth input field Remote command SENSe POWer ACHannel BANDwidth CHANnel on page 165 Defining characteristics of the adjacent channels The ACP measurement requires you to define various basic characteristics of the channels evaluated in the measurement The application supports measurements on up to three pairs of neighboring channels Changing the Number of Adjacent Channels add
222. st Parameters Trace Trace number the marker is assigned to Example CALC DELT2 TRAC 2 Positions delta marker 2 on trace 2 CALCulate lt n gt DELTamarker lt m gt X Position This command moves a delta marker to a particular coordinate on the x axis If necessary the command activates the delta marker and positions a reference marker to the peak power Parameters Position Numeric value that defines the marker position on the x axis Range The value range and unit depend on the measure ment and scale of the x axis Example CALC DELT X Outputs the absolute x value of delta marker 1 Manual operation See Marker Position X value on page 71 CALCulate lt n gt DELTamarker lt m gt Y This command queries the relative position of a delta marker on the y axis If necessary the command activates the delta marker first Analyzing Results To get a valid result you have to perform a complete measurement with synchroniza tion to the end of the measurement before reading out the result This is only possible for single measurement mode See also INITiate lt n gt CONTinuous on page 99 The unit depends on the application of the command Return values Position Position of the delta marker in relation to the reference marker or the fixed reference Example INIT CONT OFF Switches to single sweep mode INIT WAI Starts a sweep and waits for its end CALC DELT2 ON Switches on delta marker 2 CA
223. stics of the modeled signal When system modeling has been turned off this trace is not displayed If the model matches the behavior of the DUT the characteristics of the signal are the same as those of the measured signal minus the noise SS ee Zum c MuR ESCH User Manual 1176 9893 02 03 20 R amp S FSW K18 Performing Amplifier Measurements WEEN Reference signal Trace 3 shows the characteristics of the reference signal The reference signal present at the DUT input represents the ideal signal Current measured at the channel of the baseband input Trace 4 shows the characteristics of the current that is drawn by the amplifier It is measured at the channel of the baseband input e Voltage measured at the Q channel of the baseband input Trace 5 shows the characteristics of the power amplifier supply voltage It is mea sured at the Q channel of the baseband input e Power measured at the baseband input Trace 6 shows the power of the signal at the baseband input The power is the product of the current and the voltage measured at the baseband channels Traces 4 to 6 are available when parallel baseband capture has been turned on In case of the baseband capture all multipliers and offsets are already included in the results 3 Time Domain 1 Meas 2 Mod 3 Ref 4 BB I 5 BB Q 6 I Q 118 46 us 119 47 us Scale of the x axis display settings for the Time Domain The scale of the x axis depends on your configura
224. t RESult on page 106 Shift of the measured signal compared to the ideal UO constellation in the UO plane FETCh MACCuracy IQOFfset CURRent RESult on page 106 Results to check power characteristcs Numeric Result Summary Power In Power Out Gain Crest Factor In Crest Factor Out AM AM Curve Width AM PM Curve Width Compression Point 1 dB 2 dB 3 dB Signal power at the DUT input Should correspond to the generator output level FETCh POWer INPut CURRent RESult on page 111 Signal power at the DUT output FETCh POWer OUTPut CURRent RESult on page 111 Gain of the DUT FETCh POWer GAIN CURRent RESult on page 111 Crest factor of the signal at the DUT input The crest factor is the ratio of the RMS and peak power FETCh POWer CFACtor IN CURRent RESult on page 110 Crest factor of the signal at the DUT output The crest factor is the ratio of the RMS and peak power FETCh POWer CFACtor OUT CURRent RESult on page 110 Vertical spread of the samples in the AM AM result display The spread is measured at the RMS level of the signal FETCh AMAM CWIDth CURRent RESult on page 109 Vertical spread of the samples in the AM PM result display The spread is measured at the RMS level of the signal FETCh AMPM CWIDth CURRent RESult on page 110 Input power where the gain deviates by 1 dB 2 dB or 3 dB from a reference gain see Configuring compression point calculation on page 62 FETCh
225. t dBm CONF GEN POW LEV 0 Defines a level of 0 dBm See Generator RMS Level on page 45 CONFigure GENerator POWer LEVel LEDState This command queries the level configuration state on the generator Return values State GREen Level configuration was successful GREY Unknown level configuration state RED Level configuration was not successful Configuring Amplifier Measurements Example CONF GEN POW LEV LEDS would return e g GRE Usage Query only Manual operation See Generator RMS Level on page 45 CONFigure GENerator POWer LEVel OFFSet Level This command defines a mathematical level offset for the signal generator for exam ple to take external attenuation into account Parameters Level numeric value Default unit dBm Example CONF GEN POW LEV OFFS 10 Defines a level offset of 10 dBm Manual operation See Generator RMS Level on page 45 CONFigure GENerator POWer LEVel OFFSet LEDState This command queries the level offset configuration state on the generator Return values State GREen Level offset configuration was successful GREY Unknown level offset configuration state RED Level offset configuration was not successful Example CONF GEN POW LEV LEDS would return e g GRE Usage Query only Manual operation See Generator RMS Level on page 45 CONFigure GENerator SEGMent Segment This command
226. tenuation Mode Value on page 42 INPut ATTenuation AUTO lt State gt This command couples or decouples the attenuation to the reference level Thus when the reference level is changed the R amp S FSW determines the signal level for optimal internal data processing and sets the required attenuation accordingly Configuring Amplifier Measurements Parameters State ON OFF 0 1 RST 1 Example INP ATT AUTO ON Couples the attenuation to the reference level Usage SCPI confirmed Manual operation See Attenuation Mode Value on page 42 INPut EATT lt Attenuation gt This command defines an electronic attenuation manually Automatic mode must be switched off INP EATT AUTO OFF see INPut EATT AUTO on page 140 If the current reference level is not compatible with an attenuation that has been set manually the command also adjusts the reference level Parameters lt Attenuation gt attenuation in dB Range see data sheet Increment 1 dB RST 0 dB OFF Example INP EATT AUTO OFF INP EATT 10 dB Manual operation See Using Electronic Attenuation on page 43 INPut EATT AUTO lt State gt This command turns automatic selection of the electronic attenuation on and off If on electronic attenuation reduces the mechanical attenuation whenever possible Parameters lt State gt ON OFF 0 1 RST 1 Example INP EATT AUTO OFF Manual operation See Using Electronic Attenuation on page 4
227. ter 3 3 Designing a Reference Signal on page 27 2 Input and output See chapter 3 4 Configuring Inputs and Outputs on page 34 3 Trigger See chapter 3 5 Triggering Measurements on page 47 4 Data Acquisition See chapter 3 6 Configuring the Data Capture on page 47 5 Synchronisation error estimation and compensation See chapter 3 7 Synchronizing Measurement Data on page 50 See chapter 3 9 Estimating and Compensating Signal Errors on page 54 6 Measurement Modeling see chapter 3 10 Applying System Models on page 55 DPD see chapter 3 11 Applying Digital Predistortion on page 57 Envelope see chapter 3 12 Configuring Envelope Measurements on page 59 7 Result configuration See chapter 4 Analysis on page 69 8 Display configuration See chapter 2 Performing Amplifier Measurements on page 10 To configure settings P Select any button in the Overview to open the corresponding dialog box Select a setting in the channel bar at the top of the measurement channel tab to change a specific setting Preset Channel Select the Preset Channel button in the lower lefthand corner of the Overview to restore all measurement settings in the current channel to their default values Note that the PRESET key restores the entire instrument to its default values and thus closes all measurement channels on the R amp S FSW except for the default Spectrum application channel Remote com
228. th CONFigure PSWeep Y SETTing Hz in case of the center frequency dBm in case of the output level s in case of the delay between envelope and RF signal V in case of the envelope bias Default unit UNITS PS STEP Example See CONFigure PSWeep Y SETTing Analyzing Results CONFigure PSWeep Y STOP Stop This command defines the stop value for the second parameter controlled by the Parameter Sweep Parameters Stop numeric value whose unit depends on the parameter type you have selected with CONFigure PSWeep Y SETTing Hz in case of the center frequency dBm in case of the output level s in case of the delay between envelope and RF signal V in case of the envelope bias Default unit UNITS PS Example See CONFigure PSWeep Y SETTing 5 7 Analyzing Results e e rte RE 171 EE ei E 173 e Configuring Numerical Result Dieplavs 181 e Configuring Result Display Characherstlce essen 182 e Scaling ERR TEE 186 e Managing Measurement Data sees nitent nnn tnnt 191 5 7 1 Configuring Traces RIEGERT E e le RTE 171 DISPlay WINDow lt n gt TRACe lt t gt MODE Trace This command selects the traces to be displayed in the graphical result displays Suffix n 1 n t 1 n Analyzing Results Parameters Trace Available traces depend on the result display See table below for details BBI Selects the trace showing data recorded on t
229. that you have to establish when setting up the measurement For more information on that see chapter 3 4 6 Controlling a Signal Generator on page 44 e When you design the reference signal on the signal generator transfer the signal information from the generator to the analyzer with the Read and Load Current Signal from R amp S SMW button You can either design a reference signal with one of the available firmware options for example an LTE signal with the R amp S SMW K55 or design a signal in a custom waveform file Note that the R amp S FSW K18 does not support all firmware options of the R amp S SMW When you load the reference signal from a waveform file or design the signal within the R amp S FSW K18 transfer the signal information from the analyzer to the genera tor Depending on the signal source you can do this either with the Load and Export Selected Waveform File to R amp S SMW or the Generate and Load Signal and Export it to R amp S SMW buttons When you send the signal information to the generator the application automatically configures the generator accordingly Transmission state The LED displayed with the transmission button shows the state of the reference signal transmission The LED is either grey green or red e Grey LED Transmission state unknown for example when you have not yet started the trans mission Green LED Transmission has been successful e Red LED Transmission has not b
230. the Result Summary Return values lt EVM gt lt numeric value gt Minimum maximum or current Raw Model EVM depending on the command syntax Default unit Example FETC MACC RMEV CURR would return e g 0 879 Usage Query only Manual operation See Results to check modulation accuracy on page 11 Performing Amplifier Measurements FETCh MACCuracy SRERror MAXimum RESult FETCh MACCuracy SRERror MINimum RESult FETCh MACCuracy SRERror CURRent RESult This command queries the Sample Rate Error as shown in the Result Summary Return values lt SampleRateError gt numeric value Minimum maximum or current SampleRateError depending on the command syntax Default unit Hz Example FETC MACC SRER CURR would return e g 0 023 Usage Query only Manual operation See Results to check modulation accuracy on page 11 Retrieving Power Results FETCh AMAM CWIDIICURRenBIDIRESuUll 1d c co eeu eee nez Teed etl nu tee cnn ane eec 109 EETGDIAMPM GWIDIhECUREIenBI IRESUult 21 2 2 222 2 22 32 2 2 9 EEN R ONS EEANN 110 FETOIPOWer CFACtorINECURRent RESult 2 tri ten A 110 FEIChHPOWer CFACtortOUT OGURRent RESult 21 retient ENEE 110 FETCh POWer GAIN MAXimump RESUlt 2 2 2222 12220222 1o etre car rere aia va abe phai 111 FETCh POWer GAIN SMINImum RESult 2 2 2323 2c utpat im neu tene ranae eek aep 111 FETCh POWer GAIN CURRent
231. the appli cation automatically adjusts the reference level of the analyzer to the output level of the generator User Manual 1176 9893 02 03 67 Configuring the Parameter Sweep Note that it is mandatory to define the Expected Gain of the DUT Otherwise the syn chronization between the levels might fail or lead to invalid results NOTICE Risk of damage to the RF input of the analyzer Make sure to define the correct Expected Gain Otherwise the gain of the amplifier will not be taken into account during the level changes on signal analyzer and genera tor which in turn might lead to a high level signal damaging or destroying the RF input mixer of the analyzer With a correct Expected Gain value however the application is able to attenuate the signal accordingly Remote command Synchronization state CONFigure PSWeep ADJust LEVel STATe on page 167 Expected gain CONFigure PSWeep EXPected GAIN on page 167 Configuring Traces 4 Analysis The R amp S FSW K18 provides several tools to get more information about the results Most of these tools work similar to those available in the Spectrum application For more information about these tools please refer to the R amp S FSW User Manual e Gonfigutilig ee 69 e USNO MalKGlg i con ptr Aaaa aab c e esas e eR n I n Ed ibus 70 e Customizing Numerical Result Tables esses 73 e Configuring Result Display Characteristics 74 Scam E X AXIS peto ette tee orte te ese t
232. the new channel For a list of available channel types see INSTrument LIST on page 88 lt ChannelName gt String containing the name of the channel Example INST IQ Activates a measurement channel for the UO Analyzer applica tion evaluation mode INST MyIOQSpectrum Selects the measurement channel named MylQSpectrum for example before executing further commands for that channel Usage SCPI confirmed SYSTem PRESet CHANnel EXECute This command restores the default instrument settings in the current channel Use INST SEL to select the channel Example INST Spectrum2 Selects the channel for Spectrum2 SYST PRES CHAN EXEC Restores the factory default settings to the Spectrum2 channel Usage Event Manual operation See Preset Channel on page 25 5 4 Configuring the Screen Layout DISPlay FORMAL m M 91 BISPlayE WINBowesns SlZE 2 2 2 1 ron titer c itera coe Lose ka aco copa se to coco EEN baden 91 Bee el EE 91 LAYout CATalog WINDOwW ieeeeseseeesee EE seien n nennt neinda anaandaa sna 93 LAY OUtDIR CUO HR 94 LAY out ebe 94 LAYout REMove WINDOW ennemis n nnn nr nsns nin rni retener nnne nnns 94 LAYOupREPLaGEE WINDOW EE 94 Configuring the Screen Layout Bel ELE 95 LAY out WINBowe n ADDY 2 inca oce one nete exea Eb Xen IR SEH eR ua RASA E RR Y 96 LAYoutWINDow n IDENMIfy annainn oa te Rupe nn ta
233. then enne recs 109 FETCh MACCuracy FERRor MAXimum RESult FETCh MACCuracy FERRor MINimum RESult FETCh MACCuracy FERRor CURRent RESult This command queries the Frequency Error as shown in the Result Summary Return values lt FrequencyError gt lt numeric value gt Minimum maximum or current Frequency Error depending on the command syntax Default unit Hz Example FETC MACC FERR MAX would return e g 1 2879 Usage Query only Manual operation See Results to check modulation accuracy on page 11 Performing Amplifier Measurements FETCh MACCuracy GIMBalance MAXimum RESult FETCh MACCuracy GIMBalance MINimum RESult FETCh MACCuracy GIMBalance CURRent RESult This command queries the Gain Imbalance as shown in the Result Summary Return values lt Gainlmbalance gt lt numeric value gt Minimum maximum or current Gain Imbalance depending on the command syntax Default unit dB Example FETC MACC GIMB MIN would return e g 0 887 Usage Query only Manual operation See Results to check modulation accuracy on page 11 FETCh MACCuracy IQlMbalance MAXimum RESult FETCh MACCuracy IQlMbalance MlNimum RESult FETCh MACCuracy IQIMbalance CURRent RESult This command queries the UO Imbalance as shown in the Result Summary Return values lt lQImbalance gt lt numeric value gt Minimum maximum or current UO Imbalance depending on the command syntax Default unit dB
234. tion in the Display Settings dialog box The logic is as follows e When you select automatic scaling gt Position Auto and synchronization has failed the application searches for the peak level in the capture buffer and shows the signal around the peak for the Duration that has been defined e When you select automatic scaling gt Position Auto and synchronization is OK the application searches for the peak level in the synchronized area of the capture buffer and shows the signal around the peak for the Duration that has been defined e When you select manual scaling gt Position Manual and synchronization has failed the x axis starts at an Offset relative to the first sample in the capture buf fer The end of the x axis depends on the Duration you have defined e When you select manual scaling gt Position Manual and synchronization is OK the x axis starts at an Offset relative to the first sample in the synchronized area of the capture buffer The end of the x axis depends on the Duration you have defined Note The Display Settings for the time domain are only available after you have selected the Specifics for Time Domain item from the corresponding dropdown menu at the bottom of the dialog box Scale of the y axis The scale of the y axis also depends on your configuration User Manual 1176 9893 02 03 21 R amp S9FSW K18 Performing Amplifier Measurements The signal characteristi
235. tion on how to generate and export signals to a file please refer to the docu mentation of the signal generator Current Generator Waveform Custom Waveform File Generate Own Signal Use Custo rm File Select File Load and Export Selected Waveform to Generator Export To Generator DUT Peak Input Power no file selected Sample Length LAN l RF RF Generator Frontend LA ee To transfer a waveform file from the analyzer to the generator and process it with the ARB generator of the R amp S SMW for example proceed as follows n the Custom Waveform tab select a file via the Select File button gt Transfer the file to the generator with the Load and Export Selected Waveform to generator button Remote command Select file CONFigure REFSignal CWF FPATh on page 129 Transfer file CONFigure REFSignal CWF WRITe on page 129 Transmission state CONFigure REFSignal CWF LEDState on page 129 Export file CONFigure REFSignal CWF ETGenerator STATe on page 128 DUT input power CONFigure REFSignal CWF DPIPower on page 128 Designing a reference signal within the R amp S FSW K18 One way to design a reference signal is to design the signal within the R amp S FSW K18 The application provides functionality to design a basic reference signal and saves the signal characteristics in a waveform file which you have to transfer to the signal gener ator with the Send Signal to R amp S SMW button When
236. tnter c eret t itte renis 118 FETCh PTABle ACP MINimum Y RESUlt eiie oett entr eene thee tet tette 118 FETCh PTABIe ACP MINimum RESUlIt 118 FETCh PTABIe AMAM CWIDth MAXimum X RESUIt essssssssseeeeeenennn 120 FETCRh PTABIe AMAM CWIDtREMAXimum Y RESUlt un oan tne rtt eto nE EEEE 120 FETCh PTABIe AMAM CWIDth MAXimumf RESUI essen nnne FETCh PTABle AMAM CWIDth MINimum X RESult FETCh PTABle AMAM CWIDth MINimum Y RESult FETCh PTABIe AMAM CWIDth MINimum RESult eese eee tnnt 120 FETCH P TABI AMPM CWIDth MAXimum XERE Sult inngi ae a piar ai 121 FETCK PTABISAMPM CWIDth MAXimum Y RESUIt uerunt ertt rn retinetur 121 FETCh PTABIe AMPM CWIDth MAXimump RESUI eeeeeeeeeeeeeeee eene 121 FETCh PTABIe AMPM CWIDth MINimum X RESUII esee erneit nnne 121 FETCh PTABle AMPM CWIDth MINimum Y RESUII eee 121 FETCh PTABle AMPM CWIDth MINimum RESUlt esee 121 FETCh PTABIe BBPower MAXimumEXERESUlt nnne nain tute enit nen tp eee ro nente e nannte png 122 FETCRh PTABIe BBPower MAXim m Y RESI nno tnt tnn aa ENER 122 FETCh PTABle BBPower MAXimumr RESUIt 216 trn tette rre rehenes FETCh PTABle BBPower MINimum X RESult FETCh PTABle BBPower MINimum Y RESult FETCh PTABle BBPower MINi
237. trum FFT RF RF always trace 1 MODel always trace 2 REFerence always trace 3 BLANk for all three traces Spectrum FFT WRITe always trace 1 Spectrum FFT Q WRITe always trace 1 Time Domain RF always trace 1 MODel always trace 2 REFerence always trace 3 BBI always trace 4 BBQ always trace 5 BBP always trace 6 BLANk for all six traces e General Marker Settings e Configuring Individual Markers e Positioning Markers General Marker Settings DISPlay MTABle DISPlay MTABle lt DisplayMode gt This command turns the marker table on and off 5 7 2 2 Analyzing Results Parameters lt DisplayMode gt ON Turns the marker table on OFF Turns the marker table off AUTO Turns the marker table on if 3 or more markers are active RST AUTO Example DISP MTAB ON Activates the marker table Manual operation See Marker Table Display on page 72 Configuring Individual Markers CAL Culate nz DEL TamarkercmzAOEE ness ness sts naiiai S ssa sitas daas 174 CALCulate lt n gt DELTamarker lt m gt MREFP ccccccecccesesceceecececscecessseeseaeceecseecsseseeseneeees 174 CAL Culate nz DEL TamarkercmzfSTATel enne nter trennt 175 CAL Culate nz DELTamarkercmz TR ACe inneni inian dara idani iiaii 175 GALOulate n DELTamarketsrmi X ranc rarai trn Ea aai eaaa Ekaia 175 CAL Culate nz DEL TamarkercmzN nna aiiai E ipaa i nai biraine 175 CALCUlatesn MARK
238. ts When you synchronize the reference signal and the measured signal the synchronized area is indicated by a horizontal green bar on the bottom of the diagram The current reference level is indicated by a red horizontal line 1 Magnitude Capture RF Remote command Selection RF LAY ADD RFM Selection I LAY ADD IMAG Selection Q LAY ADD QMAG Result query TRACe lt n gt DATA on page 102 PAE vs Input Power PAE vs Output Power The PAE vs Input Power Output Power result displays show the Power Added Effi ciency PAE against the input or output power It helps you to find the input or output levels at which the DUT works most efficiently The x axis shows the levels of all samples of the synchronized measurement signal in dBm The y axis shows the efficiency in based on the following formula PAE RF Output Power RF Input Power DC Power The measured signal is represented by a colored cloud of values The cloud is based on the recorded samples In case of samples that have the same values and would thus be superimposed colors represent the statistical frequency with which a certain input output level combination occurs in the recorded samples Blue pixels represent low statistical frequencies red pixels high statistical frequencies A color map is provi ded within the result display 6 PAE vs Input Power 60 0 dBm 15 0 dBm Remote command Selection LAY ADD PAE Result query TRACe lt n
239. ts the general direction of the smart grid Parameters Direction HORizontal VERTical RST HORizontal Example LAY DIR HOR LAY out IDENtify WINDow lt WindowName gt This command queries the index of a particular display window in the active measure ment channel Note to query the name of a particular window use the LAYout WINDow lt n gt IDENtify query Query parameters lt WindowName gt String containing the name of a window Return values lt WindowIndex gt Index number of the window Example LAY WIND IDEN 2 Queries the index of the result display named 2 Response 2 Usage Query only LAYout REMove WINDow lt WindowName gt This command removes a window from the display in the active measurement channel Parameters lt WindowName gt String containing the name of the window In the default state the name of the window is its index Example LAY REM 2 Removes the result display in the window named 2 Usage Event LAYout REPLace WINDow lt WindowName gt lt WindowType gt This command replaces the window type for example from Diagram to Result Sum mary of an already existing window in the active measurement channel while keeping its position index and window name To add a new window use the LAYout ADD WINDow command R amp S FSW K18 Remote Control Commands for Amplifier Measurements Ech Parameters lt WindowName gt String containing the nam
240. u define the capture length and time manually you can select values that you are comfortable with However make sure to define a capture time that is greater than the length of the ref erence signal otherwise the application won t be able to analyze the signal correctly The following dependencies apply e When you change the capture time the application updates the capture length accordingly and vice versa Sample rate and bandwidth remain the same When you change the sample rate or bandwidth the application updates the cap ture length accordingly The capture time remains the same Note that the maximum capture time depends on the current measurement bandwidth Remote command Mode SENSe SWEep TIME AUTO on page 148 Time SENSe SWEep TIME on page 148 Capture length SENSe SWEep LENGth on page 148 Reference signal SENSe REFSig TIME on page 147 R amp S9FSW K18 Configuring Amplifier Measurements Inverting the UO branches The application allows you to swap the and Q branches of the signal if required This is useful for example when the DUT inverts the real I and imaginary Q parts of the signal and transfers the signal that way Note that the sideband is also inverted when you turn this feature on Remote command SENSe SWAPiq on page 147 3 7 Synchronizing Measurement Data The R amp S FSW K18 allows you to synchronize the measured signal
241. u select the maximum bandwidth manually make sure that this band width is suited for the signal you are testing Otherwise the signal may be distorted and results are no longer valid When you are using the baseband input R amp S FSW B71 the maximum bandwidth is always limited to 80 MHz If you have no bandwidth extension this setting is not available Remote command Mode TRACe IQ SRATe AUTO on page 149 Sample Rate TRACe 10 SRATe on page 149 Bandwidth TRACe 10 BWIDth on page 149 Max Bandwidth TRACe 10 WBANd STATe on page 150 Max Bandwidth TRACe 10 WBANd MBWidth on page 150 Configuring the measurement time The measurement time or capture time defines the duration of a measurement in which the required number of samples is collected The capture length is the number of samples that are captured during the selected measurement time The capture length is a function of the sample rate and the capture time Automatic adjustment When you select automatic adjustment of capture time the application selects a cap ture time that is appropriate for the characteristics of the reference signal Length of the reference signal As orientation the application shows the length of the reference signal in the corre sponding field in the dialog box gt Ref Signal Duration For more information about the reference signal see chapter 3 3 Designing a Refer ence Signal on page 27 Manual definition When yo
242. uency The EV is a measure of the modulation accuracy It compares two signals and shows the distance of the measured constellation points and the ideal constellation points The unit is dBm In the R amp S FSW K18 you can compare the measured signal against the reference sig nal and against the modeled signal e Measured signal against reference signal Trace 1 compares measured signal and the reference signal To get useful results the calculated linear gain is compensated to match both sig nals Depending on the DUT noise and nonlinear effects may have been added to the measurement signal These effects are visualized by this trace Measured signal against modeled signal Trace 2 compares measured signal and the modeled signal The EVM between the measured and modeled signal indicates the quality of the DUT modeling If the model matches the DUT behavior the modeling error is zero or is merely influenced by noise This result display shows changes in the model and its parameters and thus allows you to optimize the modeling When system modeling has been turned off this trace is not displayed uum EP EIU RN MC NN NUUS User Manual 1176 9893 02 03 19 R amp S9FSW K18 Performing Amplifier Measurements T 5 Error Vector Spectrum 1 Meas Ref 2 M Remote command Selection LAYOUT SEVM Result query TRACe n DATA on page 102 Spectrum FFT The Spectrum FFT result display shows the frequency spectrum of the signa
243. ult Summary or Specifics for Parameter Sweep Table item from the corre sponding dropdown menu at the bottom of the dialog box Dieter 4 Result Summary The dialog box for the Result Summary is made up out of three tabs e One for modulation accuracy results One for power related results e One for voltage and current related results The results in this tab are available after you have activated baseband measurements The supported results of the Parameter Sweep Table are part of a single dialog box You can add or remove individual results by turning them On or Off Remote command DISPlay WINDow lt n gt TABLe ITEM on page 181 DISPlay WINDow lt n gt PTABle ITEM on page 181 Configuring Result Display Characteristics The R amp S FSW K18 allows you to define the information displayed in various graphical result displays gt To access result display characteristics proceed as follows Configuring Result Display Characteristics e Inthe Configuration Overview select the Result Configuration button and then the Display Settings tab e Press the MEAS CONFIG key select the Result Config softkey and then the Display Settings tab Markers Marker Settings Display Settings X Scaling Y Scaling Time Domain Normalise to 1 On ff Position Manual Offset 1 0 us Duration 2 0 us AM PM Display Phase Gain Display X Axis Input Power Parameter Sweep R
244. ure POWer RESult P3DB STATe on page 166 Input power CONFigure POWer RESult P3DB REFerence on page 166 R amp S9FSW K18 Configuring Amplifier Measurements 3 14 Configuring Adjacent Channel Power ACP Measure ments The R amp S FSW K18 allows you to define the basic characteristics of the Tx channel and neighboring channels when you perform ACP measurements gt To access ACP settings proceed as follows e Inthe Configuration Overview select the Measurement button and then the ACP Settings tab e Press the MEAS CONFIG key and then select the Meas Config softkey and then the ACP Settings tab Modeling DPD PAEnvelope Supply ACP Settings Power Settings Parameter Swe Auto Adjust to BW ff Tx Channel Bandwidth 0 0 MHz Mt Side Eent iid 20 0 MHz Adjacent Channel Spacing 20 0 MHz No of Adjacent Channels Selecting the measurement bandwidth 1 iiic Lazare eva aac rg 63 Defining characteristics of the transmission channel 64 Defining characteristics of the adjacent channels AAA 64 Selecting the measurement bandwidth When you perform an ACP measurement it is important to select a measurement bandwidth that is large enough to capture all channels that should be evaluated in the ACP measurement The application allows you to automatically adjust the measurement bandwidth to the bandwidth occupied by all channels evaluated in the ACP measurement To do so turn on the Auto Adjust Acqui
245. uring error estimation and compensation When you turn on error estimation only the results are not compensated for the corre sponding errors When you turn on error compensation the displayed results are also corrected by the estimated errors Note that in that case the signal might look better than it actually is Compensation without estimation is not possible You can estimate and compensate the following effects e QImbalance combined effect of amplitude and phase error Applying System Models e Amplitude Droop decrease of the signal power over time in the transmitter e Sample Error Rate difference between the sample rate of the reference signal and the measured signal 3 10 Applying System Models The R amp S FSW K18 allows you to calculate a polynomial model that describes the characteristics of the DUT based on the input signal and the output signal of the ampli fier gt To access system modeling settings proceed as follows e Inthe Configuration Overview select the Measurement button and then the Modeling tab e Press the MEAS CONFIG key and then select the Meas Config softkey and then the Modeling tab Modeling DPD ACP Settings Power Settings Parameter Swe Modeling Modeling Sequence AM AM Order 0 to 18 AM PM Order 0 to 18 Modeling Level Range No of Modeling Points Turning system modeling Off and e 55 Selecting the degree of the polynomial
246. ut 2 an external trigger Enable Parallel BB CaSplle oot he eaa a ERN RR eR Aro PX n EX Rer Ye NEES 38 JN ie p virus C setyageeecntsnmeceeediaaedecettag 38 High Accuracy Timing Trigger Baseband RE ce enn ett 38 User Manual 1176 9893 02 03 373 3 4 2 Configuring Inputs and Outputs Enable Parallel BB Capture Turns simultaneous data capture on the RF input and the analog baseband input on and off This is necessary when you perform measurements that take into account the supply voltage and the current drawn by the PA Remote command INPut SELect BBANalog STATe on page 137 Input Configuration Defines whether the input is provided as a differential signal via all four Analog Base band connectors or as a plain UO signal via two simple ended lines Note Both single ended and differential probes are supported as input however since only one connector is occupied by a probe the Single ended setting must be used for all probes Single Ended l Q data only Differential l Q and inverse 1 Q data Not available for R amp S FSW85 Remote command INPut IQ BALanced STATe on page 136 High Accuracy Timing Trigger Baseband RF Activates a mode with enhanced timing accuracy between analog baseband RF and external trigger signals Note Prerequisites for previous models of R amp S FSW For R amp S FSW models with a serial number lower than 103000 special prerequisites and restrictions
247. ut EIE Ter dE RE VE 136 INPut GAIN STATe INPut GAIN VALue INPULIMPGdanG s E PS INPuLIO BALanced ECH A REH 136 leie E E BBcode 141 INPut SELectBBANAalog STATe reote riri a iy Eed nec Pate cte 137 ENT ae CREate BUR SE 87 INSTrument CREate REPLace INSTr ment CREate NEW entr err erp rn ten rentrer re nr ver d Pe evan INTE Eengel er eu EO rece ri A esi vcre ene ee eerie eura aa Ea arD MINS cane a Hl SR c 88 INSTr ment RENAOITIO occi tre Eee rptu eet a a ep etu oc Pa VR CY Rete ve da 89 INSTrument SELEeCt iriiri 90 LAYOUCADD A IER EN LAYout CATalog WINDow 293 Ie wo ibi ee M 94 LAY out erf muss EEEE 94 EAYout REMove E WINBOYg 2 t rrr rrr nt neret nt rre n tet v eee a Ra LAYout REPLace WINDow DEP do D Inc Lu Ua ss cat cee ese LAYU WINDOWSEM A IR rette topo ou c teatri tren tgp eget ea eet ater crane 96 EAYOoUutWINBDOWSHs DENIUTy i ricette rire ee eon er eee erc decir on eie EY YF e EE Y Se e 97 LAYOUCWINDOW E MOV E 97 LAYout Ale Te E Ee 97 LAYOUCWINDOWSMA bd HN 98 MMEMory LOAD IQ STATe 191 MMEMory STOResn IQ COMMEN sissit rneer atat rennen t aec E EYE EE SER EXE raia 1
248. wer of the amplifier is calculated OFF All results are evaluated RST OFF Example CONF POW RES PONL ON Evaluates the output power only Manual operation See Evaluating only the DUT output power on page 62 Configuring Amplifier Measurements 5 6 15 Configuring Parameter Sweeps CONFloure b Weep Aust EVet STATel nnne nnne 167 GONFigure PSWeep EXPectediGAIN itio etuer eu totam terne eR Een Rire eR ez 167 GONFigure PSWeep STAT 2 1 riore tret uet ena sudes vei vdeaveves LE e ER Na 168 CONFigure PSWegspiXISET Ting EE 168 CONFIE P SWEEP X STAR EE 168 CONFig re PSWeep X STEP nirna na dta EENE a i 169 EE Le Dh EE 169 CONFig re PSWeep CR H E 169 CON Figure E HR EE 170 CONFigure PSWeep V STA RE 170 CONFig re PSWeep YS TEP E 170 CONFigqurePSWebspNSTOD EEN 171 CONFigure PSWeep ADJust LEVel STATe lt State gt This command turns synchronization of the generator output level and the analyzer ref erence level on and off The command is available when one of the parameters used in the Parameter Sweep is the Generator Power When you synchronize the levels it is recommended to also define the expected gain of the DUT with CONFigure PSWeep EXPected GAIN Parameters State ON OFF Example CONF PSW ADJ LEV ON Synchronizes the generator output level and the analyzer refer ence level Manual operation See Synchronizing the levels of signal generator and analyzer on page 67 CONFi

R&S FSW-K18 Amplifier Measurements User Manual

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R&amp;S FSW-K18 Amplifier Measurements User Manual

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R&S FSW-K18 Amplifier Measurements User Manual