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DS8821 SPECTRUM ANALYZER OPERATION MANUAL

1. IDI 06 01 16 16 16 53 Ref 68 8 dBpU NEGA Log 10 dB Detector Sample Posi Peak Neg Peak Normal Average Tm A laud um CENT 150 00 MHz SPAN 10 00 MHz gt RBW_ 100 KHz UBU 100 KHz SWEEP 500 ms fitt 10 dB c Neg Peak IDI 06701716 16 17 01 Ref 68 8 dBpU NOR Log 10 dB Detector Sample Posi Peak Neg Peak Average Vui Vul lol Return CENT 150 00 MHz SPAN 10 00 MHz gt RBW_ 100 KHz UBU 30 KHz x SUEEP 500 ms fitt 10 dB d Normal IDI 06701716 16 17 19 Ref 68 8 dBpU AUG Log 10 dB Detector Sample Posi Peak Neg Peak Normal Return CENT 150 00 MHz SPAN 10 00 MHz gt RBW_ 100 KHz UBW_ 30 KHz SWEEP 500 ms fitt 10 dB e Average f Quasi Peak Figure 3 33 Detector Mode 1 Sample Detector sample the data point in the middle time of VBW filter output of each sweep point and displayed it It is more suitable to view the noise
2. IDI 06 01 16 15 43 17 Ref 68 5 dBpU PEAK Log 10 dB BU paco pus Res BU fee 5 Manu Video BU i35 Manu Video Aug On 9338 gl L 41 CENT 150 00 MHz SPAN 10 00 MHz gt RBW_ 100 KHz UBU 100 KHz SWEEP 50 ms fitt 5 dB a VBW 100KHz IDI 06 01 16 15 43 41 Ref 68 5 dBpU PEAK Log 10 dB Bud uideo pu Res BU 300 H S Video BU fiuto Manu Video Aug On 933 CENT 150 00 MHz SPAN 10 00 MHz gt RBW_ 100 KHz 300 Hz _ SWEEP 2 s fitt 5 dB b VBW 300 Hz Figure 3 16 The Influence of VBW In Figure 3 16 b there is a VBW on the screen in which indicates that VBW parameter is in Manu state now The same will use to indicate the Manu of RBW sweep time attenuator too 3 Video Average IDI 06 01 16 15 44 44 Ref 68 5 dBpU PEAK Log 10 dB Video Average Res BU 100 C BU 1 GU Manu Video BU Manu Video Aug on EH SPAN 10 00 MHz UBU 100 KHz SWEEP 50 ms fitt 5 dB a Video Average Off CENT 150 00 MHz RBU 100 KHz 3 8 IDI 06 01 16 15 44 58 Ref 68 5 dBpU PEAK Log 10 dB Video oi B Res BU C BU 100 pet Manu Video BU pet Manu PI IN A WE
3. Figure 3 8 Reference Level Input 2 Attenuator Attenuator is an important part of the Instrument It can reduce the signal distortion by attenuating the power level of the mixer input signal The value of attenuator is from 0 to 55dB with 5dB step the default value is 10dB Increasing the value of attenuator can diminish the mixer distortion but the base noise of the system will increase too that will reduce the range of measurable signal In auto mode the system can automatically provide a suitable value of attenuator If user wants to set the attenuator manually user should firstly set the Atten softkey in figure 3 7 to Manu and then input the value by number keys Up Down key or the knob By Up Down cursor or the knob the change step is 5dB and can t set attenuator to OdB The amplitude of signal input to mixer should little than 20dBm otherwise the signal may be distorted 3 Scale Log Line In Log state the difference of Y coordinate has the direct ratio to AdB while in line state it has the direct ratio to voltage difference AV In most cases the instrument is in logarithm state but in some special cases for example when measure the modulation degree of AM the line state is the better choice The common used unit in logarithm state is dBm dByV or dBmV The wave will not change with the change of unit The common used unit in lin
4. CENT 177 750 MHz RBU 30 KHz UBU 100 Hz SWEEP 5 fitt 10 dB On Chamel 7 w nem C 74 91 dBpU N Nc 22 83 2 5 0 38 0 dBpU Nc 14 72 dBpU 1 2 More gt CCN 35 25 dB Figure 5 20 CCN Measure Step2 The current CCN value displays on the information window Its calculate method is CCN Carrier Amplitude N N Nc Correct to measurement BW LOG detect Noise IF Noise Equal Pwr BW Analyzer Noise Correction Nc Noise amplitude It is the average value of the points around the minimum value which frequency is close by 1 25MHz down to the carrier Correct to measurement BW 10 Log Noise BW RBW Noise BW is different according to different CATV standard These values have been list on the table 5 2 RBW is the resolution bandwidth when the CCN test is performed 30 KHz LOG detect Noise It includes the Gauss envelope demodulation correction 1 05dB and the change correction 1 45dB of voltage to logarithm express Its value is 2 5dB IF Noise Equal Pwr BW It is the correction of analyzer IF detector shape To DS8821Q this value is 0 38dB Analyzer Noise Correction When the test result is close to the analyzer inherent noise the result need to be corrected according to the difference of testing result and analyzer inherent noise Analyzer Noise Correction 10 log 1 10 A 10 For example when A 1dB
5. 5 13 5 0 3 Favorite COM eliana 5 13 bf A oid d eite e eb ie Meoadinadie ss dede deti tee b debi HM edu alee gated 5 14 BIRDS IDEE 6 1 6 11 SSUMMANZE ie etse Eee tpi e ss ii 6 2 6 2 Constellation Diagrar e tirer Ere ai ere ec 6 2 6 3 Statistice Graph irarri gere teen enu Ee 6 3 6 4 Equalizer DISplay Em 6 3 SS O AE 6 4 Tracking Generator and HFC Analy Zet 2 ececeecceceeeeeeeeeee cece nn 7 1 FAX Tracking Jeneratorciiitai cada 7 2 Other Functions and Settings coooonnnnninnicnnnnnnnonccnccrna ee ee iaaa a eea aa eee aanre see ea anni gees eases sa aaa Ekaina annaia 8 1 8 1 System Calibration iid we es Mn eee A a rece hee deed 8 2 8 2 SYSTEM COMMG citar E 8 2 A Setial INO i tein cha E poten toe ori a be ROC c taupe eh stung eade e a das e desea tt eau ed cuc tayag de cue sk o LER AA 8 2 9 22 Print Save diplex key e828 rr etr tetto rr nate er tede t oer iere t suche prs 8 2 GAME TCI ct a cee adi 8 4 8 24 Clock Setting mE 8 4 8 2 5 Language Selecta dc 8 4 9 2101 Paletas etae it erue Ie eese dct os aestu Pott scc sra Persei accus ri ioc e ie eco 8 4 2 SystemiInformialtiOn z 5 x n debet er EE C OR emo et ER nip END Def 8 5 B28 SLATS AM O bead sence da gea E EE E 8 5 9 2 9 Dated Md at iia 8 5 8 3 Software Update tii id 8 5 8 4 Other Functions C ia 8 6 APPO Ii A
6. 9 1 9 1 Specifications cai ais is e lo te Ln Efe tom ere deed 9 1 9 2 Message INdeXn atardecer soci 9 5 III Figure 2 1 Figure 2 2 Figure 2 3 Figure 2 4 Figure 2 5 Figure 2 6 Figure 2 7 Figure 3 1 Figure 3 2 Figure 3 3 Figure 3 4 Figure 3 5 Figure 3 6 Figure 3 7 Figure 3 8 Figure 3 9 Figure 3 10 Figure 3 11 Figure 3 12 Figure 3 13 Figure 3 14 Figure 3 15 Figure 3 16 Figure 3 17 Figure 3 18 Figure 3 19 Figure 3 20 Figure 3 21 Figure 3 22 Figure 3 23 Figure 3 24 Figure 3 25 Figure 3 26 Figure 3 27 Figure 3 28 Figure 3 29 Figure 3 30 Figure 3 31 Figure 3 32 Figure 3 33 Figure 3 34 Figure 3 35 Figure 3 36 Figure 3 37 Figure 3 38 Figure 3 39 Figure 4 1 Figure 4 2 Figure 4 3 Figure 4 4 Figure 4 5 Figure 4 6 Figure 4 7 Figure 4 8 Figure 4 9 Figure 5 1 Figure 5 2 Figure 5 3 Figure 5 4 Figure 5 5 Figure 5 6 Figure 5 7 Figure 5 8 Figure 5 9 Figure 5 10 Figure 5 11 Figure 5 12 Figure 5 13 IV INDEX Figure Index ELO Mii A A A A 2 2 Front Panel Key cocoa 2 3 Rear panel ote E PE E E TEE E EN E E E E AE E E A T 2 5 Single Window Mode tia teer n rerit rex reto ete eade eer eiie pres 2 6 Double witdQW 1 cette A dese dg areae Te doen e eed Ped ra deed ae desea done ode one 2 8 Information WIN dd Wiz a osi t reco we et ada 2 8 QAM Analyzer Screen cii esercito dux cdi eite ride 2 9 azione 3 2 Frequency Unit Men ire rre e o lt tet LEE 3 2 Span MOM
7. SPAN Span setting key Set the value of sweep span AMPLITUDE Amplitude parameter setting key Set the reference level attenuator Log Line state amplitude unit and the display scale etc WINDOW After press this key you can choose On Off state of double window display mode switch between two windows set zone center and zone position of the up window etc by pressing the corresponding soft key in the submenu of it 2 MARKER NORMAL In the menu of this key you can set the On Off state get the information or do the comparison of every marker In spectrum mode you can set 8 markers at most PEAK After pressing this key the system will set a marker on the peak value of the wave and display the frequency and amplitude information of this marker at the same time Also you can open the peak table set the peak track etc in the corresponding menu of this key 3 CONTROL SWEEP Set sweep time and sweep mode in the corresponding Double windows key Markers setting key Peaks setting key Sweep parameters setting key menu of this key 4 BW Set the value of resolution BW and video BW Choose the On Off state of video average and input the needed average time when the video average is On TRIG Set the trigger to Free Run Video or TV H and set the corresponding characters of these triggers
8. Figure 3 15 The Largest RBW That can Distinguish the Signals If RBW is set to Manus state when span frequency exceeds the range which is listed in Table 3 2 the system will give the prompt UNCAL Span RBW Span lt 5 KHz 30 Hz Span lt 10 KHz 100 Hz Span lt 20 KHz 300 Hz Span lt 50 KHz 1 KHz Span lt 100 KHz 3 KHz Span lt 1 MHz 10 KHz Span lt 5 MHz 30 KHz Span lt 10 MHz 100 KHz Span lt 50 MHz 300 KHz Span lt 500 MHz 1 MHz Span gt 500 MHz 3 MHz Table 3 2 RBW Auto settings Need the option 2 The RBW can be changed from 30Hz to 3MHz taking the step of 1 3 10 After setting the Res BW to Manu state user can change the RBW by inputting the number pressing the Up Down cursor or rotating the knob 2 Video BW Video bandwidth VBW is the lower pass filter after the IF filter which can make the display trace noise more smoothly It is very useful to detect the signal which level is near to the noise To improve the filter s effect user should manually set the VBW to smaller than 1 10 of the RBW When VBW is set to Auto the VBW will change with RBW The VBW filter need establish time too and the smaller its value is the more time it needs 3 7 Chapter 3 Basic Measurement
9. Return Figure 8 13 System Default Palette To provide a more comfortable use of different environment you can change the color of information wave edit background or background etc The change step is firstly to selecting the item you want to change and then turning the knob until gets the color you wanted Auto Set Return to the system default color settings There two modes Indoor and Outdoor can be selected in the submenu of this soft key Save save the changed colors 8 2 7 System Information Press the About soft key in the second page shown as figure 8 2 b then you can view the software version the firmware version space information calibrate information option information and so on i 06 06 07 16 10 56 ta dis L fout Ref 98 8 dBpU PEAK Log 10 Software Version 2 08 Return Firmware Version 1 08 15894 KB 9172 KB 2006 05 12 13 09 05 2006 05 12 13 08 16 Total Remain Space Last Amp Calibrate Last Freq Calibrate Option Information 01 CATU M 02 30 Hz RBU x 03 EMI x 04 TU H Trig M 05 QAM Mt 06 HFC 07 Tracking Generator Y gt E Mail ds88Z104s ina com http uuw deviser com cn Copyright C Deviser Electronics Instrument Co Ltd SPAN 1 000 GHz i SWEEP 50 ms fitt 10 dB CENT 500 MHz RBU 3 MHz UBU 1 MHz Figure 8 14 About Menu 8 2 8 Status Pres
10. 1 2 More gt CENT 500 MHz RBU 3 MHz UBU 1 MHz SPAN 1 000 GHz SWEEP 50 ms ftt 10 dB a First Page Press the CONFIG key on the front panel then you can configure the system Figure 8 2 shows the submenu of this key IEI 07704710 09 13 22 10 dB Ref 5 0 dBm PEAK Log Config 1 Service gt Palette gt About gt Status gt Date Format gt Er A CENT 60 500 MHz SPAN 8 000 MHz RBU 100 KHz UBU 100 KHz SWEEP 20 ms fitt 15 dB b Second Page 2 2 More gt Figure 8 2 Config Menu 8 2 1 Serial No Serial number is an important symbol of this instrument and it is very useful for the maintenance Press the SN soft key the serial No will be displayed on the up left corner of the screen which is shown as the figure 8 2 a 8 2 2 Print Save diplex key There is a PRINT SAVE diplex key on the front panel Two soft keys Select Prn Sav and Print Save in figure 8 2 are defined to cooperate with this diplex key Select soft key defines the current state of PRINT SAVE key When it is set to Prn after pressing PRINT SAVE key the picture that is being displayed on the screen will be printed out If the printer isn t prepared we
11. CENT 150 00 MHz SPAN 10 00 MHz RBU 100 KHz UBU 100 KHz SWEEP 50 ms fitt 5 dB b Video Average On Figure 3 17 Video Average Set the Video Avg to On then the spectrum will calculate the average value of current trace and previous traces values The default state of Video Avg is Off Turn on the Video Avg can smooth display trace as VBW but the sweep time will not be increased with it When Video Avg set On the default detector mode will be changed to Sample mode automatically See also 3 3 4 The default average time is 100 Press number key after setting the Video Avg to On can change the average time 3 2 2 Sweep Mode Sweep Time and Hold IDI 06 01 16 15 45 23 Ref 68 5 dBpU PEAK Log 10 dB Sweep 1 Sweep Time 50 ms Manu Sueep Sigl cl adka ait CENT 150 00 MHz SPAN 10 00 MHz RBW 100 KHz UBU 100 KHz SWEEP 50 ms fitt 5 dB Figure 3 18 Sweep Menu Press SWEEP on the front panel the sweep menu will appear 1 Sweep Time Sweep time depends on span RBW and VBW If the sweep time can t fulfill the requirement of span RBW and VBW the system will give the prompt UNCAL User can set the Sweep Time to Manu and input the wanted time Chapter 3 Basic Measurement 2 Sweep Mode There two sweep modes one is
12. 2 Positive Peak Detector sample the positive value of VBW filter output of each sweep point and display it If the sweep time is long enough this detector can put out the maximum envelop of the modulated signal 3 Negative Peak This detector is opposite to Posi Peak detector The output of it is the minimum envelop of the signal 4 Normal This detector continuously samples the positive peak value of the signal while alternately samples the positive and the negative peak value of the noise and display it 5 Average The output of this detector is the average value of all detected values for each sweep point 3 3 5 NdB PTS E MEAS IDI 06 07 14 13 19 29 Ref 98 8 dBpU PEAK Log 10 dB N dB 3 HB Poihts 311000 KHz N dB PTS 3 dB EX or Disp Line on ET DL Delta On Measure Temper Sei ea Rif PAN CENT 150 0000 MHz SPAN 500 0 KHz xRBU 30 KHz UBU 30 KHz SWEEP 50 ns ftt 10 dB Figure 3 34 Measure Menu Press MEAS key on the front panel the submenu of it will appear which is shown as figure 3 34 Press N dB PTS soft key and set the state of it to On The system will display the information of N dB bandwidth that indicates the character of current used filter on the up right of the screen The default value is 3dB and the output is
13. CAL OUT O TG OUT EF IN Figure 7 2 TG connection diagram After connecting the TG well set the TG status to On then the screen that is shown as figure 7 3 will display on the screen The level range of the tracking generator is from OdBm 108 8 dBuV to 60dBm 48 8 dBuV The default output level is 88 8 dBuV when the first time TG was set to be on After pressing TG level soft key by running the knob pressing the Up Down key or directly inputting the number can change the output level of the TG But if it is the first time to use TG or the testing environment has been changed it is recommended to do a power calibration firstly before using it to test devices The calibrating step is firstly to connect the TG OUT to the RF IN with a standard BNC cable It would be better to use the accessory cable and then press the Power Cal soft key The TG will be automatically calibrated from OdBm to 60dBm This calibration probably needs several minutes And you d better not power off the analyzer when it shows Calibrating on the screen If the TG cannot fulfill the requirement that the level flatness in all frequency range is less than 1dB the system will give the prompt Calibrate Failed The calibration data will not be lost with the power off of the analyzer 7 2 IDI 06 06 07 16 06 12 Ref 98 8 dBpU PEAK Log 10 dB E TG T
14. IDI 06 01 16 15 46 18 MKR 150 00 MHz dB Ref 68 5 dBpU PEAK Log 10 66 48 dBpU Normal 1 Marker i 150 00 MHz UD h Marker Marker Frequency Til EN Amplitude Frequency Time Delta Mark Information of Marker Fixed Mark On ET Marker To Center Marker r m i To Ref Lul Wi All off 1 1 2 More gt CENT 150 00 MHz SPAN 10 00 MHz M RBW 100 KHz UBU 100 KHz SWEEP 50 ms fitt 5 dB Figure 3 22 Marker Menu After press the Mkr Normal softkey if there is no marker on the system will automatically set the normal marker to on If there have been some On markers the state of these markers will remain unchanged 1 Normal Marker After pressing Mkr Normal soft key or pressing NORMAL key while no marker is set On the normal marker will appear on the screen And at the same time the amplitude and frequency time information of this marker will be displayed on the up right of the screen When the span is set to zero the wave display on the screen is a time domain wave so the abscissa is changed from frequency to time The start time is zero and the stop time is equal to sweep time The displayed marker information is changed to time too The abscissa of the marker can be changed by three methods 1 Press Up Down cursor The step change of this method is 1 10 of
15. 0 01 dB Absolute accuracy typ 1 0 dB 20 C Measurement range 1MHz 1000 MHz Bandwidth range 200kHz 200MHz Modulation Error Ratio MER Range 22 dB 40 dB Accuracy 0 5dB 22 30 dB 1 0dB 30 35 dB 1 8dB 35 40 dB 9 3 9 4 Chapter 9 Appendix Error Vector Magnitude EVM Range 0 65 4 1 1 Second Period Bit Error Rate BER Before and After R S Decoding Range 1e 9 2e 3 Symbol Rate Range 1 7 MS s 9 2 Message Index Chapter 9 Appendix NO MESSAGE BECAUSE RESOLUTION 01 Please Input Channel Before channel measuring you haven t input a Input a channel NO or a frequency channel NO or a frequency 02 Please Remove Mod In the case of C N measurement after Turn off the modulate Message will measuring the carrier level system requires to not disappear turn off the modulation of the signal 03 Press Measure Confirms you to turn off the signal when Press Measure To Start measuring CTB CSO 04 Please Turn Carrier Off Signal s modulate should be off when measuring Turn off the signal s carrier CTB CSO 05 Confirm Channel When exiting CTB CSO or C N measurement Press again to exit otherwise Press again to exit you d press Return twice It may clue you on restore the signal continue measuring 06 Must in Measure Want to turn of
16. View last After at least one entire measurement User can choose this soft key to view the last measure result If user never finished a measurement the instrument will show the notice Half baked Data else user will enter the submenu of it which is shown as figure 6 6 In this menu user can choose View All no matter how long the statistic period is But the other 4 soft keys only can be activated when the statistic period is more than 400 minutes User can zoom in the store statistic to see the details of graph or User can look the graph page by page i 96 06 29 15 27 18 m 64 Qan Symb 6 875 MS S IStatistic BER Pre FEC TR TR lt 1 0E 9 uM BER Post FEC lt 1 0E 9 Zoom In MER 38 5 dB ENM 14 7 AB Eun 0 8 z Zoom Out PJ 9 3 E DE 0 0 x AI 9 1 z Page Up SNR 42 1 dB cs 42 4 dB E aan T Page Doun CI 34 dB TAE PR doaa Freq Offset ER Avg dB 38 7 1 11 KHz BER Pre fug 1 00E 9 Real Sunb BER Post fug 1 00E 9 6 875 M5 5 SYMB A FEC STREAM A m Return Tine 0 1 3 CENT 500 000000 MHz Att 10 dB Figure 6 6 Statistic View Menu 6 4 Equalizer Display Press the Equalizer soft key the submenu of this key will appear which is as shown in figure 6 7 IDI 06 10 17 14 08 34 64 Qam Symb 6 875000 msys Ha
17. 1 The charge time is about 5 hours after the indicative lamp changed please add one hour more When finished remember to turn off the power 2 Battery short circuit is forbidden 3 Disposing the battery in fire is forbidden otherwise it will explode 4 Do not try to open the battery and change its structure nor distort the battery 5 Do not throw the battery into water or other liquids 6 Do not use or store the battery upon 60 degree Celsius 7 Donot strike the battery and don t fall it down 8 Do not charge the battery in reverse direction 9 Charge voltage 220V 50 60 Hz 1 2 1 2 About the User Manual Please read the user manual carefully first before turning on the power of the instrument so that you can use it to its best performance level There are some clues about the preparing process 1 Brief introduction about instrument s character You can get a clear idea about the outlook of main part and accessories and distinguish different function combinations of them Also you can know the main function and characters of the instrument 2 Main operating method of the instrument The user manual gives detailed explanation about the daily use functions and using the measuring picture to tell the user the main operating methods 3 How to do Self Calibration It is very important for the user instrument to do calibration during its first use because it will affect the accuracy of the test
18. 5 7 FCC Report By pressing the Sys Meas soft key in the CATV root menu User can enter the FCC menu In this menu the information about the FCC report will display on the screen IEI 06710703 13 03 52 Ref 38 8 dBmU SHPL Log 10 dB Heasure View gt I FCC 1 t CENT 178 75 MHz SPAN 8 000 MHz RBU 300 KHz UBU 100 KHz SWEEP 20 ns fitt 10 dB Channel Return Figure 5 48 FCC menu Press Measure softkey then the analyzer will automatically test the system according to the settings that defined in TV Plan Every enable items of the enable channels will be measured 5 14 Note This test will take a long time if most channels and items are set to Enable And the testing process can t be interrupted So before press this soft key please check the TV plan firstly to make sure that all the enable channels and items are what you want to test After measure the FCC report will be store on the DOC Disk On Chips The file name is defined by the two posterior number of year such as 06 month such as 03 date such as 15 file number The file number is from 00 to 99 It is said that in one day the DOC mostly can save 100 FCC reports View View the existed FCC report As Figure 5 48 shows
19. Manu user can input the frequency step 3 1 2 Sweep Span FREQUENCY SPAN AMPLITUDE Chapter 3 Basic Measurement Press the SPAN key then the submenu will appear which is shown as Figure 3 3 IDI 06 01 16 15 36 55 Log 10 dB Ref 78 8 dBpU PEAK Span 1 Span Zoom Span Frequenty 20 00 MHz Full Span Zero Span Last Span CENT 150 00 MHz SPAN 20 00 MHz a RBU 300 KHz UBU 300 KHz SWEEP 50 ns fitt 10 dB Figure 3 3 Span Menu 1 Span Span equals the stop frequency minus the start frequency The span setting determines the horizontal axis scale of the analyzer display The span range of the instrument is from OHz to 1000MHz The larger span is set the more signal can be viewed the lower precision the measurement will get On the contrary the narrower span is set the fewer signals can be viewed the higher precision the measurement will get So choosing the appropriate span is important There are three methods to change the span first is manually input second is to press the Up Down key which change step is 1 2 5 and the change sequence is 200Hz 500Hz 1KHz 2KHz 1000MHz last is to rotate the knob the change step is 1 100 of the span Note 1 When the RBW is set to Manu too large span will cause the imprecision of the measurement In such cases th
20. 0 0 Al 0 2 p A v n Pn da a 128 Qam SNR 42 4 dB CS 42 9 dB d E 256 Qam CI gt 34 dB Freq Offset i gi b i 1 09 KHz QPSK Real Synb d ES 4 x 4 L3 6 875 MS S SYMB A FEC A STREAM A y Return Time 0 1 28 CENT 500 000000 MHz Att 10 dB Figure 6 13 Modulation Mode MER Th Press this soft key to set the threshold of MER which range is from 10 to 40dB The default value is 23 5dB BER PRE Th Press this soft key to set the threshold of BER Pre FEC which range is from 1e 2 to 1e 9 The default value is 1e 5 BERPOST Th Press this soft key to set the threshold of BER Post FEC which range is from 1e 2 to 1e 9 The default value is 1e 8 Note User can change these thresholds according to user requirement When the measure result become lower than the corresponding threshold the color of the result will be changed for arresting the user s attention Standard Presses this soft key user can choose different standards in its submenu The instrument supports J83 ANNEX A J83 ANNEX B J83 ANNEX C Reverse and NO FEC Decoding See Figure 6 14 IDI 06 06 29 15 29 39 64 Qam Synb 6 875 MS S Standard BER Pre FEC J83ANNEX lt 1 0E 9 s a E BER Post FEC lt 1 0E 9 s JB 3ANNEX MER 38 5 dB B ENM 14 7 dB
21. 250S Span 2 200 Hz 204S 250 S Span 0 Hz Accuracy lt 1 Trigger type free run single video TV Option 3 Resolution bandwidths Range 1KHz 3 MHz in 1 3 10 sequence 30Hz 100Hz 300Hz option 2 Bandwidth accuracy lt 15 Selectivity 60 dB 3 dB bandwidth ratio lt 5 1 Video bandwidths Range 30Hz 1 MHz in 1 3 10 sequence Stability Phase noise 10 kHz RBW 100 Hz VBW and sample detector lt 110 dBc Hz 100 kHz offset from CW signal lt 90 dBc Hz 10 kHz offset from CW signal Amplitude Specifications Measurement range Displayed average noise level to maximum safe input level Input attenuator Range OdB 55dB Step 5dB Internal preamplifier Frequency range 1MHz 1000MHz Gain 20dB Noise figure 4dB Max safe input 128dBuV Peak power input attenuation 15dB 100VDC Gain compression 0 5 dB 98 7dBuV ATT 0 Preamplifier OFF 0 5 dB 78 7dBuV ATT 0 Preamplifier ON Displayed average noise level 100 Hz VBW sample detector typs10 dBuV 1 MHz 1000MHz with Preamplifier OFF input terminated OdB attenuator 30 kHz RBW typs 10 dByV 1 MHz 1000MHz with Preamplifier ON Spurious responses Second harmonic lt 68 dBc for 88 7 dByV tone at input mixer and Preamplifier Third order intermod 68 dBc for two 88 7 dByV tone frequency at
22. Change to normal spectrum mode 68 Can t do FCC measure now Can t do FCC measure in scan channel menu Return to normal mode and set the time again 69 Turn ON TG The tracking generator is closed when Set the tracking generator to On performing the tracking generators power calculation and normalization 70 Turn Log ON When performing the power normalization of the Change the Scal state in the tracking generator the analyzer should in the log amplitude menu to Log mod 71 Turn Gate ON In CCN and CSO CTB measurement changing Set the Gate to On the View softkey to Vid should firstly setting the Gate to On 72 Can t delete an active plan In Channel Table user can t delete the active Activate another plan then delete plan this plan 73 Please use Unfreeze mode In QAM equalizer display the frequency Set the equalizer to Unfreeze mode response and Group delay only can be refreshed to see the frequency response and when equalizer in Unfreeze mode group delay 74 Can t delete the last channel When there is only one channel in the selected Delete the selected channel table 9 6 Chapter 9 Appendix NO MESSAGE BECAUSE RESOLUTION channel table user can t delete it 75 No item System measure is selected but there is no test Edit the active TV plan Set the item in the active TV plan is set to enable wanted items to enable 76 No
23. Channel 7 DEPTH MODULATION 77 5 v Return b TV Line Testing Figure 5 17 Depth Modulation Depth modulation describes the carrier s depths of modulation If user has option 3 user can press TV Line to specify one line with white reference to perform a gate based measurement For getting result precisely every TV filed should have one line with white reference 5 5 5 Carrier Level 8 Frequency The video carrier level test measures the amplitude and frequency of the current visual carrier and the amplitude and frequency difference between the visual and aural carrier IDI 06 07 14 13 46 38 MKR 166 728000 MHz E Ref 98 8 dBpU PEAK Log 10 dB 81 16 dBpU Carrier EN Return E Add Att 3 nz fi Sub Att T5 H A or Max Hold on 0538 CENT 163 000 MHz SPAN 8 000 MHz RBU 300 KHz UBU 1 MHz SUEEP 2 s Att 10 dB Channel Z Visual Carrier 98 99 dBpU Freq 160 249584 MHz Visual To Audio 4 17 82 dB Freq 6 478416 MHz Figure 5 18 Carrier Level amp Frequency In the default status only the amplitude information displays on the screen But if user set counter on the Chapter 5 CATV Analyzer frequency information will be displayed on the screen too The frequency now is calculated by the counter with resolution of 1Hz If the carrier waveform is not stable enough user can turn Max
24. Once the port Impedance is fixed on 50ohm or 75 ohm we can exchange dBm and dBmV to each other Though the physical definitions are different the exchange is linear User should notice that when we measure the signal power the units we used are the same as the units of the reference level 4 1 2 Channel Measurements Menu When user presses the soft key Channel Measurements the Channel Measurements Menu will appear like the figure below IDI 06 01 19 08 20 24 Ref 98 8 ABpU AUG Log 10 dB Chan Meas Channel Power gt n m Occupied BU gt Adj Chan Power gt ye Settings gt i Wai ry fiverage EU or CENT 500 MHz AN 1 000 GHz RBU 3 MHz SPI i UBU 1 MHz SUEEP 50 ms fitt 30 dB Qan Stop Meas Figure 4 2 Channel Measurements Menu In this menu we can choose to measure the Channel Power Occupied Bandwidth ADJ Channel Power and modify other parameters if the optional choice Digital TV Analyzer is selected another soft key QAM will appear in the menu and user can directly come into the Digital TV analysis function from the Channel Measurements Menu Channel Power refers to the whole power of the signal in certain span After modifying the center frequency user can modify t
25. RBU 300 KHz UBW 300 KHz SWEEP 20 ms Att 10 dB Figure 3 7 Reference Level Note The smallest value of reference value is changed according to the different attenuator setting The details will be introduced in next section User can set the unit of reference to dBm dBmV dByV mV V uV or nV in the instrument The exchange formula between different units is shown as table 3 1 Formula Source value New value dBm dByV 108 8 68 8 dBuV 40 dBm dBm dBmV 48 8 8 8 dBmV 40 dBm dBm 20 log MV 2 778 MV 40 dBm 48 8 Table 3 1 Exchange formula from other units to dBm Table 3 1 only lists the formula to dBm if user like user can deduce the others Three methods to change reference level 1 Input by number key After inputting the number the unit menu will appear Choose the unit user need to finish the reference level input 2 Input by Up Down cursor The change step of this method is the amplitude that one grid corresponds to 3 4 3 Input by Knob The change step of this method is the amplitude that 1 10 grid correspond to i 06701716 15 38 05 Ref 78 8 dBpU PEAK Log 10 dB Ref Level 4 dBn UnitdBm1 dBnU dBpU mU Fi PR F R CENT 150 00 MHz SPAN 20 00 MHz EE RBU 300 KHz UBU 300 KHz SWEEP 50 ns fitt 10 dB
26. U Line Field E Even CENT 179 000 MHz RBU 300 KHz UBU Channel DS 7 SPAN 8 000 MHz gt 100 KHz SWEEP 64 us ftt 10 dB p Return In Channel Response 0 8 dB Line 27 1 2 More gt IDI 07 04 09 16 28 35 MKRA 2 000 MHz Ref 10 0 dBn SMPL Log 10 dB 1 63 dB ATAN In Ch Resp AFA Signal gt CENT 179 000 MHz RBU 300 KHz UBU Channel DS 7 SPAN 8 000 MHz HEE 100 KHz SWEEP 64 us Att 10 dB p Return In Chamel Response 0 8 dB Line 27 1 2 More gt Figure 5 36 In Channel Response Insert Test Signal 5 11 Chapter 5 CATV Analyzer IRE m mires at ee ee t i r 1 i i j i LI i t 112 0 i 95 167 475 58 5 S a O0 a Ghost Canceling Reference Signal 600 560 mv mo ro 4 m at av ya go oo asas 200 TIME in ps 300 00 47 12 0 16 0 236 297 357 416 476 536 620 20 0 29 1 350 41 1 471 53 1 59 1 b FCC Multiburst Test Signal 100 gt oS 10 203 0358 42MMz 3 ie m 3 PES 180 START 120 160 540 800 619 636 E 50 C NTC 7 Combination Signal Figure 5 37 Vertical Interval Test Signal 5 6 Channel Scan Besides measure a single channel user
27. there are three reports we can get Run the knob to select the report Press View to see the detail of FCC report The basic information is displayed in the first page of the FCC report which is shown as Figure 5 49 a The followed are the analog channel testing results Five results of analog channels can be displayed in one page The digital channel testing results will display on the last page There are mostly 15 digital test results can display on the screen In the report means the Gate is set to On but the analyzer can t successfully trig the line The blank corresponds to the Disable testing items Delete Delete the selected report Upload Upload the selected report to the USB disk or the PC LJ 06 10 03 13 25 06 Ref 25 8 dBmU AUG Log 10 dB FCC View Caption Create Date Number gt 06101200 2006 10 12 16 12 27 1 Virum 06100300 2006 10 03 13 03 57 1 06100301 2006 10 03 13 15 58 6 Delete Upload gt CENT 355 000 MHz SPAN 8 000 MHz RBU 100 KHz UBU 30 KHz SWEEP 20 ns fitt 5 dB Return Figure 5 49 FCC View Menu i 06 10 03 13 25 21 T Ref 25 8 dBnU AUG Log 10 dB E View 1 File Nane o6100301 Faye t Start Tinc 2006 10 03 13 15 58 Stop Time 2006 10 03 13 21 58 Temperature 28 0 Page Down Total Channel 6 Analog Channel A Digital Channel a Print 173 Return CENT 3
28. verage On Off Return Line Add Att Field Odd Even Sub Att Average On Off Measure Next Chan Continue Last Chan Next Beat Gate On Off View Meas Vid 1 3 More gt 2 3 More gt ap 3 3 More CLDI gt 1 1 eturn DIF Gain amp DIF Phase 1 2 Add Att In Channel Response gt 1 3 ub Att Prev Menu 3 3 More gt 2 14 Chapter 3 Basic Measurement 3 Basic Measurement 1 1 Line CCIR LN17 FCC CTS Note Field Odd Even UK ITS II NTC 7 CTS Note Signal GBLN19 Add Att Sub Att Return Average On Off Return 1 2 CCIR LN330 FCC CTS Note Field Odd Even UK ITS IL NTC CTS Note Signal GBLN19 Add Att Sub Att Return Average On Off Return Marker 1 Marker 2 1 3 Sweep Sig Max Hold On Off GCR VITS Test RBW 300K 100K Multiburst Return Signa gt gt Return Return Marker 1 Marker 2 RBW 300K 100K Line Field Odd Even Return 1 2 More gt 7 View Meas Vid Signal gt Return 2 2 More gt NOTE Right side in PAL standard while left side in NTSC standard 2 tandard Channel gt easure User Channel gt Ref Line On Off Favorite Channel gt Count On Off Lvl Limit eturn eturn Analog Digital Count On Off Measure Return Fav Set 1 Fav Enter Return 2 15 2 16 Chapter 3 Basic Measurement 3 Measure View Page Up View Delete Page Down Return Upload Return Return RS 232 USB Disk Return 4 efresh Grid On Off Template On Off Zoom In Continuous Zoom
29. 0 0 4 7 13 7 16 6 35 9 39 1 43 8 62 1 d FCC Composite Test Signal Figure 5 31 CLDI Testing Signal 5 5 12 Differential Phase Gain With option 3 user can measure the Differential Phase Gain IDI 06 06 05 10 11 48 Ref 126 6 dBpU SMPL Line X 1 Line 55 etn P Gaal Field E Even 1 il Signal gt H fidd Att i li Y de Sub Att CENT 178 650000 MHz SPAN O Hz RBU 300 KHz UBU 100 KHz SWEEP 80 us fitt 40 dB Differential Phase 2 9 Return Differential Gain 0 9 Figure 5 32 Differential Phase Gain The differential gain test measures the change in amplitude of the chrominance sub carrier as the luminance changes from a blanking level to a white level The five step riser portion of the composite test signal is used to perform this measurement The differential phase test measures the change in phase of the chrominance sub carrier as the luminance changes from a blanking level to a white level It uses the same test signals with differential gain In PAL standard CCIR Line Chapter 5 CATV Analyzer 330 and UK ITS 1 are recommended while in NTSC standard the FCC Composite Test Signal and the NTC 7 Composite Signal can be used TIME in 40 0 44 0 48 0 52 0 56 0 62 0 us 0 0 47 12 0 Figure 5 33 Matrix Signal CCIR Line 330 5
30. 100 KHz SWEEP 50 ms fitt 10 dB Figure 3 32 The Example of View 3 Blank Erase the display of the selected trace 4 Max Hold Max Hold mode is similar to Write Mode but the wave shown on the screen will keep the largest value comparing with the history after Max Hold mode is selected 3 3 4 Detector Mode The Instrument has 6 detector modes which are shown as figure 3 31 IDI 16 06 01 16 16 rx Detector Ref 68 8 dBpU SMPL Log 10 Pos i Peak Neg Peak Normal t Return SPAN 10 00 MHz NEN x SUEEP 500 ms fitt 10 dB ui CENT 150 00 MHz RBU 100 KHz UBU 30 KHz gt a Sample IDI 06 01 16 16 16 32 Ref 68 8 dBpU PEAK Log 10 dB Detector Sample Posi Peak Neg Peak Normal Return SPAN 10 00 MHz UBU 100 KHz SWEEP 500 ms fitt 10 dB b Posi Peak CENT 150 00 MHz RBU 100 KHz Chapter 3 Basic Measurement
31. 5 13 In Channel Response In channel frequency response measures the baseband frequency response of the channel under test There are two ways to measure the in channel response use a sweep signal or insert a test signal it needs the option 3 IDI 07 04 09 16 26 27 MKRA 3 808 MHz Log 10 dB 0 66 dB Ref 10 0 dBm PEAR In Ch Resp Marker 1 Marker 2 s ML IYA A l pa Signal gt CENT 179 000 MHz RBU 300 KHz UBU 1 MHz Channel DS 7 SPAN 8 000 MHz s LS SWEEP 5 fitt 10 dB p gt In Channel Response 0 3 dB Return Figure 5 34 In Channel Response Sweep Signal IDI 07 04 09 16 26 34 MKRa 3 808 MHz Log 10 dB 0 66 dB Ref 10 0 dBn PEAK CIn Ch Resp GCR Multiburst 2 pl a NA CENT 179 000 MHz RBU 300 KHz UBU 1 MHz Channel DS 7 SPAN 8 000 MHz s LS SWEEP 5 fitt 10 dB p gt In Channel Response 0 3 dB Return Figure 5 35 Signal Selection Single line VITS Testing requires one of the following test signals in the vertical blanking interval The ghost canceling reference signal is the preferred test signal since it has the most signal level and provide a swept frequency reference over the range of interest for measurement The FCC
32. 8 dBpU AUG Log 10 dB Ch Power T E CENT 339 00 MHz RBU 300 KHz UBU 1 MHz CHANNEL POWER Power 77 53 dBpU 8 50 dBpU Hz Single SPAN 16 00 MHz SWEEP 50 ms Att 30 dB CSP 4 00 MHz CBU 8 00 MHz Stop Meas Figure 4 4 Channel Power Menu In Figure 4 4 the area between the two lines is the Channel Bandwidth and in the little window at bottom the Power represent the overall power of the channel under test the CSP represent the Channel Spacing the CBW represent the Channel Bandwidth Also user can use single scan or continuous scan function by selecting the soft key Single or Continuous Note If user wants to use other measure functions user should exit the Channel Power menu by press soft key Return to return step by step otherwise it will show no response to user Chapter 4 Auxiliary Measurements 4 1 3 Occupied Bandwidth Occupied Bandwidth is the frequency range which represents certain percent of the whole power In Channel Measurement Menu user can press soft key Setting to modify the Channel Spacing and Occupied Bandwidth Power manually The default of Channel Spacing is 4 MHz and 99 9 for Occupied Bandwidth Power In Channel Measurement Menu when user presses soft key Occupied Bandwidth the Occupied Bandwidth Menu will app
33. CCN 52 60 dB Figure 5 22 CCN Gate Settings Chapter 5 CATV Analyzer IDI 06706705 11 03 18 Ref 93 8 dBpy SMPL Line X 1 m E Lj Cal reir CENT 179 00 MHz RBU 30 KHz SPAN 0 Hz gt UBU 100 Hz SWEEP 80 us Att 25 dB F Chamel 2 2 More gt Figure 5 23 Testing Line View Press the View soft key and set it to Vid status Then user can see the video waveform display of the line you have selected to do the CCN testing Change it to Meas status again to go on the CCN testing If user wants to exit CCN test press Return and user will get a message to notice user to turn on the modulation and press Return again user will exit the CCN test 5 5 7 HUM The hum test measures the percentage of amplitude modulation for low frequency disturbance by measuring the peak to peak variation for total hum IDI 06 10 03 12 12 44 MKR 20 9 ns Ref 86 6 nU PEAK Line X 1 61 304 nU Hum Return Add Att a gt pur Sub Att Measure BES rr CENT 176 250000 MHz SPAN Hz RBU 1 MHz UBU 1 MHz SUEEP 75 ns ftt 10 dB Channel DS 7 HUM LOW FREQ DISTURBANCES 5 6 A Figure 5 24 HUM If the hum gt 3 it means the signa
34. Delay Max 0 38 dB 3 416 MHz Tregor rset Min 1 09 dB 0 602 MHz PAST Mie Delta 1 47 dB 4 018 MHz Real Symb Current 0 39 dB 3 438 MHz 6 875 MS S a SYMB FEC amp STREAM 4 m Return Time 0 0 4 CENT 355 000000 MHz Att edB O dB Figure 6 9 Frequency Response Display Group Delay Display The group delay response can be viewed independently from within the Equalizer Display by pressing Group Delay soft key The maximum minimum values the difference of them and current values are displayed on the screen 6 4 IDI 06 10 17 14 09 24 64 Qam Symb 6 875000 s s Han Equi BER Pre FEC Age lt 1 0E 9 Set Equ gt BER Post FEC Group lt 1 08 9 Delay 60 all MER 32 2 dB EMM 8 9 4B NAN EUM 1 5 P Y Equalizer PJ 95 QE 0 0 e nS Frequency RI 0 0 z Response SNR 33 1 dB CS 80 4 dB 120 i 7 7 i 7 eS 2 50 1 25 0 MHz 1 25 2 50 Delay Max 64 40 nS 1 912 MHz Freq Offset Min 35 50 nS 2 922 MHz 551 RH Delta 99 90 nS 4 834 MHz Real Symb Current 31 10 nS 3 416 MHz 6 875 MS S SYMB FEC amp STREAM amp m Return Time 0 0 4 CENT 355 000000 MHz Att dB 0 dB Figure 6 10 Group Delay Display 6 5 Settings After pressing the settings soft key the submenu of this key will appear which is shown as figure 6 11 a By pressing 1 2 More gt user can enter the
35. F Next Beat Chamel 7 C 117 12 dBpU C CSO 57 85 dB Offset 288 000 KHz 1 3 More gt C CTB 5 44 dB Offset 16 000 KHz Figure 5 28 CTB CSO Gate Measure 5 5 10 Leakage 151 06701717 10 42 51 MKR 176 250 MHz Ref 78 2 dBpU SMPL Log 10 dB 75 16 dBpU Leak A Return Wi Ww E RES Sub Att E CENT 176 250 MHz SPAN 8 000 MHz i RBW 300 KHz UBU 300 KHz SWEEP 200 ms fitt 10 dB Channel 7 Leak 75 2 dBpU Figure 5 29 Leakage Leakage is radiant signal from the cable to the air that cause by the off normal disconnection of the distribute system When testing leakage user should set the antenna close to the possible leak point of the cable The distance should be less than 3 m and the antenna should be parallel to the cable Then tune the antenna to get a maximum value of the leakage Chapter 5 CATV Analyzer 5 5 11 Chrominance to luminance Delay Inequality CLDI IDI 06706705 10 11 20 Ref 126 7 ABpU SMPL Line X 1 E CLDI J Line In Line En E Field D Even fi pY Signal gt pH Add Att Sub Att CENT 178 650000 MHz SPAN O Hz NEEE RBW 300 KHz UBU 100 KHz SWEEP 80 us Att 40 dB Chroma Luma Delay 33 ns Return Figure 5 30 CLDI Measure With option 3
36. Hold on 5 5 6 Carrier to Composite Noise The result of the carrier to composite noise measurement is the ratio of the peak video carrier level modulated or unmodulated to the noise measured in one of the manners described below 1 Turn Off the Modulation In menu shown as figure 5 13 b press Carrier Noise to perform the Carrier to Composite Noise measurement After initialization system will show a message Press Continue to go on and Please Remove Mod If possible user can turn off the modulation and then press Continue to go on the test The information window displays the measure result and correction value If user cannot turn off the modulation and press Continue soft key the measurement is not very precise IDI 06 01 17 10 38 22 MKR 176 246 MHz Ref 78 8 dBpU SMPL Log 10 dB 70 13 dBpU E CCN 1 19 Press Cbntinug to go pn Return Add Att Prod Continue CENT 177 750 MHz SPAN 8 000 MHz LS Gate RBU 30 KHz UBU 100 Hz SWEEP 5 s fitt 10 dB on ET Channel 7 102 Please Remove Mod C 74 91 dBpU 1 2 More gt Figure 5 19 CCN Measure Step 1 IDI 06 01 17 10 38 41 MKR 174 966 MHz Ref 58 8 dBpU AUG Log 10 dB 14 01 dBpU CCN J Return Add Att Sub Att Measure SPAN 8 000 MHz LS Gate s
37. IDI 06 06 05 09 57 52 MKR 176 426 MHz Ref 108 8 dBpU AVG Log 10 dB 78 12 dBpU CTB CS01 View ES via 1 25 CTB 1 25 0 25 0 25 CENT 176 250 MHz SPAN 8 000 MHz gt RBU 30 KHz UBU 100 Hz SUEEP 5 s fitt 40 dB Channel C 118 25 dBpU C CSO 40 12 dB Offset 176 000 KHz 3 3 More gt C CTB 8 37 dB Offset 16 000 KHz c Figure 5 27 CTB CSO Testing Menu CSO points usually set at the frequency of 1 25MHz or 0 25MHz lower to the visual carrier in the PAL standard and 1 25MHz or 0 75MHz lower in the NTSC standard Pressing Next Beat the marker will switch among these points The marker can be set manually by pressing the UP DOWN key or running the Knob Next Chan and Last Chan function enable user to measure CTB and CSO of adjacent channel By this way user can find an idle channel and firstly measure the carrier amplitude of its adjacent channel that contains signal and then measure the CSO CTB in the idle channel Then user can get an estimation of the system CSO CTB without turning off the carrier Be similar with CCN if user wants to exit CTB CSO test user should press return twice IDI 06 06 05 13 48 50 MKR 176 538 MHz Ref 108 8 dBpU SMPL Log 10 dB 59 27 dBpu ICTB CS01 Return Add Att Sub Att AAN ALA y Measure j n MI 1 25 CTB 1 25 Continue 0 25 p 25 CENT 176 25 MHz SPAN 8 MHz m RBU 30 KHz UBW 100 Hz SWEEP 64 us Att 40 dB
38. Menu Function and Menu Settings Annotation 2 1 Chapter 2 Getting Started 2 1 Front Panel 2 1 1 The Subassembly of Front Panel 0 E 6 000 Ce 7 9 C9 OOS Figure 2 1 Front panel D Soft Power key As press the power key to turn on off the instrument the green light LED beside the POWER key will shine to show that the instrument is working now Note After press this key the software will receive a hardware interrupt Then it will finish the current operation as fast as possible and save the useful characters After that it will control the power to switch off These operations protect the internal memory of the analyzer from being damaged by suddenly power supply off In some special conditions such as update the software this key will be out of work At that time the POWER key on the rear panel can take place of this key See 2 2 9 Power switch 2 TFT Colorful LCD Display the wave and parameters The diagonal of it is 6 4 inches It can display 640 pixels on X axis and 480 pixels on Y axis 3 USB Interface This port is prepared for the USB disk USB keyboard can be connected to this port too Y Calibration Signal Output Port CAL OUT Its output is a standard radio frequency signal which frequency is 150MHz and amplitude is 20dBm The type of connector is standard BNC type 2 2 Radio Fr
39. Out Cyclic Display Mode Time Filter Return Return 5 Set Time Measure Star Stop View Last Return Off 6 Set Equ gt Freeze All UnFreeze Equalizer Special Frequency Response Distance m foot Group Delay Return Return 7 Centr Freq Auto Symb Rate Auto Manu On Atten Auto Manu Off Amplifier Return Modulation Mode Return 16QAM 1 2 More 32QAM 64QAM 128QAM MER Th Auto Manu 256QAM BER PRE Th Auto Manu QPSK BERPOST Th Auto Manu Return Standard J83ANNEX A Polarity gt J83ANNEX B Default J83ANNEX C 2 2 More gt Reverse Auto No FEC Decoding Normal Return Reverse Return Chapter 3 Basic Measurement BEAR Peak Search Next Peak Next Peak Right Next Peak Left PK Table On Off Marker to Center PK Sort Freq Amp Marker to Ref Lvl PK Track On Off 1 2 More 2 More PRINT SAVE Print Save Screen Single Sweep no menu 0 LE SPAN Span Settings Span Span Zoom Full Span Zero Span Last Span SWEEP Sweep Settings Sweep Time Auto Manu Sweep Cont Sigl Trace amp Detector Settings Trace ABC Sample Write A B C Posi Peak View A B C Neg Peak Blank A B C Normal Max Hold A B C Average Detector Return TRIG Trigger Settings Sweep Cont Sigl Line Free Run Field Odd Even B D G I H K K1 L Video ee q TV H gt Return Slope WINDOW Double Windows Zone Center Zone Span Zone PK Right Zone P
40. Picture s 07 04 10 10 35 40 y Ref 10 0 dBm PEAK Log 10 dB Previcul Page Up Page Down Name 11 Time 2007 4 10 9 3 Return CENT 500 MHz SPAN 1 000 GHz Loud RBU 3 MHz UBU 1 MHz SUEEP 20 ms Att 10 dB Figure 8 9 Preview Picture 8 2 3 Baud Rate After pressing RS 232 Band Rate soft key in the submenu of it which is shown as figure 8 10 you can set the band rate of COM port The default value is 115200bps and whenever DS8821 is reset this default value will be set to COM port Note The baud rate is set for the transmitting from the instrument to PC for example send pictures to the PC or receive the update files from the PC So you should make sure that the PC baud rate is in accordance with the instrument IEI 04 05 31 10 03 32 Ref 78 8 dBuU SHPL Log 10 dB 115200 sedes CENT 500 MHz SPAM 1000 MHz RBU 1 MHz UBU 1 MHz Figure 8 10 Baud Rate Setting Menu SWEEP 200 ns ftt 8 4 8 2 4 Clock Setting Press the Set Clock soft key you can set the On or Off of the time display If select On state you can input the local time The step of clock setting is that firstly input number and then select Sec Minute Hour Day Month and Year The input format is 2006 Year 01 Month 02 D
41. Q gt Return Time 0 0 2 CENT 500 000000 MHz Att 10 dB Figure 6 4 Display Mode 6 3 Statistic Graph Press Statistic soft key the submenu of this key will appear which is shown as figure 6 5 D 06 06 29 15 26 05 64 Qan Symb 6 875 MS S gan Stat BER Pre FEC 5 Se ime lt 1 08 9 mp BER Post FEC lt 1 0E 9 10 Measure 4 MER 39 0 dB Star EE ENM 15 2 dB ea EVM 0 7 x View Last gt PJ 0 3 e E 3 QE 0 0 ep al 0 2 x BER POST SNR 42 5 dB CS 43 4 dB E 9 Cl gt 34 dB 9 n i Freq Offset MER Aug B 1 10 KHz BER Pre fug Real Symb BER Post fiug 6 875 MS S SYMB A FEC A STREAM Q m Return Time 0 0 1 CENT 500 000000 MHz Att 10 dB Figure 6 5 Statistic Graph The statistic graph provides the statistic graph of MER BER Pre FEC and BER Post FEC in a specified period At the bottom of the statistic graph the instrument put out the average values of these statistic indexes Set Time After pressing this soft key user can enter a period of time by inputting the number directly turning the knob or pressing the array key The statistic period can be set from 1 to 4320 minutes Measure After setting time press Measure soft key and choose Start Stop of it then the measure will go as user s wish
42. T Frequency Al 9 0 d Response SNR 32 9 dB CS 76 5 dB Group CI gt 34 dB Delay 130m Om 130m 261m 391m Freg Offset Tine 1 018 ps 1 01 HE Distance 132 9 n Real Symb Level 30 0 aB 6 875 MS S a SYMB FEC amp STREAM amp m Return Time 0 0 5 CENT 355 000000 MHz Att dB 0 dB Figure 6 8 Equalizer Coefficient Display Equalizer Coefficient Display Press Equalizer soft key then the equalizer coefficient will independently display on the screen which is shown as Figure 6 8 The level distance and time values corresponding to the white indicatrix will display on the screen too Frequency Response Display Independently display the frequency response by pressing Frequency Response soft key In this mode vertical and horizontal markers are available to perform specific measurements In Figure 6 9 the maximum minimum values the difference of them and current values are displayed on the screen D 06 10 17 14 09 11 64 Qan Symb 6 875000 ms s Man Equi BER Pre FEC 2 1 0E 9 4 Set Equ gt BER Post FEC Freq 3 lt 1 08 9 Resp 2 all MER 32 4 dB 1 ENM 8 6 dB i EUM 1 6 z L Equalizer PJ 0 5 ri 3 2 QE 0 0 misas Al 0 0 z dB Response SNR 32 9 dB E CS 79 6 dB 5 7 7 i i i Group CE eam 2 50 1 25 0 MHz 1 25 2 50
43. The user can calibrate the instrument according to the listed operating steps 1 3 ESD Electrostatic Discharge Electrostatic discharge can damage or destroy electronic components so all work on electronic assemblies should be performed at an anti static workstation The following suggestions may help to reduce ESD damage that occurs during testing and servicing operations gt Before connecting any coaxial cable to the instrument for the first time every day momentarily ground the center and outer conductors of the cable gt Personnel should be grounded with a resistor isolated wrist strap before touching the center pin of any connector and before removing any assembly from the unit Be sure that all instruments are properly earth grounded to prevent a build up of static charge 1 4 Technical Support and other Services The instrument is warranted against defects in material and workmanship for a period of eighteen months We provide the training to warrant that you can master the application of the instrument soon Deviser also provides technical support for your special use of the instrument including redesign software for production adjustments alarms and limit test which is charged only the cost for service besides the above service we are ready to answer any questions from the user and provide you with technical support in updating the software We welcome you to contact us on the following contact detail
44. This is up to see the time domain information of selected frequency Zero span is very useful to observe the characters of AM and FM signal and the signal of time domain See also 4 2 5 Last Span Change the current span back to last span User can directly change between current span and last span by pressing this soft key in order to view the difference of the signal display between these two conditions 3 1 3 Amplitude FREQUENCY AMPLITUDE Pressing AMPLITUDE key the submenu will appear which is shown as Figure 3 3 3 3 Chapter 3 Basic Measurement IDI 06 11 03 09 47 56 Ref 98 8 dBpU PEAK Log 10 dB Ref Level 98 8 dBpU Amplitude il Atten LE Manu Amp Units gt Scale Div Ref Offset On Amplifier CENT 150 00 MHz SPAN 20 00 MHz gt on 338 RBU 300 KHz UBU 300 KHz SWEEP 20 ms ftt 10 dB Figure 3 6 Amplitude Menu 1 Reference Level Reference level is display on the up left of the screen which is sign as Ref See figure 3 7 The default value of Ref is 98 8dByV IDI 06 11 03 09 47 56 Ref 98 8 dBpU PEAK Log 10 dB Ref Level 98 8 dBpU Amplitude Referenc Level Amp Units gt Scale Div Ref Offset On 0338 Amplifier CENT 150 00 MHz SPAN 20 00 MHz gt on 338
45. a a E x z EUM 0 8 x JB3ANNEX C PJ 0 2 gt gt s gt QE 0 0 Al 0 2 x Reverse SNR 42 2 dB CS 42 2 dB s gt No FEC CI gt 34 dB Decoding Freq Offset A a x 1 09 KHz Real Symb y i x A x 6 875 MS S SYMB A STREAM Q m Return Time 0 1 40 CENT 500 000000 MHz Att 10 dB Figure 6 14 Standard Polarity Presses this soft key user can enter the submenu to set the polarity of the signal such as Auto Normal and Reverse But if user s manual setting of the polarity is not in accordance with the real state of input signal the analyzer may be unable to decode the signal The default state of system is auto See Figure 6 15 MN 06 06 29 15 29 49 64 Qan Synb 6 875 MS S Polarity BER Pre FEC ES lt 1 0E 9 e a H BER Post FEC lt 1 0E 9 2 se H gt Normal MER 38 6 4B ENM 14 8 dB m EVM 0 8 PA Reverse PJ 0 2 es f xi x x QE 0 0 gt Al 0 1 ra w LI SNR 42 2 dB CS 42 5 dB e gt 2 de E CI 34 dB Freq Offset ai 1 08 KHz Real Symb x F 3 X A A Z A 6 875 MS S SYMB A FEC A STREAM A n Return Time 0 1 50 CENT 500 000000 MHz Att 10 dB Figure 6 15 Polar
46. according to the following steps 1 Take out the instrument from the case and check it to make sure that there is no damage caused by transportation shipment Unload the case carefully and check the package If the package is in good condition please save the package for later use If the package is damagea it indicates that the instrument must have felt heavy impact during the transportation In such condition you d better keep the original state of the package and inform the freight Co to inspect the instrument together according to the operation regulations introduced in this manual You can claim damages to the freight Co according to the damage station of the instrument and connect us to arrange the repair 2 Check all the accessories and data Check the accessories and data according to Table 1 1 The ordered options will be delivered with the instrument too If they are not sufficient please contact us and show the delivered invoice Accessories Note 750 BNC BNC testing cable One Charger 19V 3 42A Manual Book Disk English Table 1 1 Accessories 1 1 2 About the Charger How to judge the status of the charger When charging if the spectrum analyzer is turned off the red lamp will shine Finished the orange lamp will shine When charging if the spectrum analyzer is turned on the green lamp will shine Finished the orange lamp will shine Battery life span 300 times recharged Cautions
47. can also get the information of multi CATV channels by pressing Scan Char soft key in the CATV root menu In the submenu of Scan Chan user can choose to scan the Standard Channel User Channel or Favourite Channel And you can set the limit level by pressing LVL Limit line The channel which carrier level is lower than the limit level will be omitted during the channel scan 5 12 151 06 01 17 10 48 36 Ref 103 8 dBpU PEAK Log 16 dB ICATU Meas Standard Channel gt User Channel gt Favourite Channel gt Lvl Limit CENT 179 000 MHz SPAN 8 000 MHz RBW 100 KHz UBU 100 KHz SWEEP 50 ns Att 45 dB Return Figure 5 38 Channel Scan Root Menu 5 6 1 Standard Channel Standard channel scan will scan all channels in the channel table include analog and digital channels To analog channel the amplitudes of the carrier and the first sound are measured when Count is set to On the frequency of them is counted While to the digital channel only the channel power is measured Press the Measure soft key in the submenu of Standard Channel The test result will be shown on the screen as a histogram A white line will display on the screen while scan the channels Running the knob can change the position of the white line The channel No visual frequency visual carrier amplitude and the amplitude difference between v
48. can get from the screen of single window mode is listed in table 2 1 2 6 Chapter 3 Basic Measurement Table 2 1 Spectrum Screen information o NN Reference Level Current reference level The logo of Deviser eperme formene Current amplitude scale graduation 8 Marker Frequency The frequency of the selected marker Marker Amplitude The amplitude of the selected marker 10 l UNCAL Indicates that the measurement is in an illogical settings message 11 Menu item corresponding to the soft key Position of display Shows values for the display line line Active area Used to display the currently active functions note that the data can be changed and their related values 13 i E i 7 Deme 7 0 20 EE Displays the current resolution bandwidth RBW is preceded by an asterisk when set in manual mode Frequency selected for the video bandwidth filter VBW value is preceded by an asterisk when set in manual mode Frequency span of the current display Time required to make a single sweep SWP is preceded by an asterisk when set in manual mode Current attenuator level ATT is preceded by an asterisk when set in the manual mode generator Battery status The voltage status of the battery Preamplifier status It display on the screen means preamplifier is open now 2 7 Chapter 3 Basic Measurement 2 Double Windows Press WINDOW to enter double windows mode then the sc
49. center frequency reference level 4 Peak Table and Peak Sort Peak table has the similar format as marker table See Figure 3 30 Press the PK Sort soft key can sort the found peaks by Freq or Amp When set the PK Table to On the system will search 8 peaks and sort them with frequency or amplitude The default state is by amplitude The frequency time and amplitude information of these peaks will display on the bottom of the screen The peaks will change with the wave change 3 13 Chapter 3 Basic Measurement IDI 06 01 16 16 13 49 Ref 78 8 dBpU PEAK Log 10 dB Peak 2 1 F 2 EUH ore PK Sort y Freq 78 PK Track i on CH CENT 500 MHz SPAN 1 000 GHz gt RBU 3 MHz UBU 1 MHz SWEEP 50 ns ftt 10 dB 1 2 MHz 86 07 dBpU 5 600 MHz 43 53 dBpU 2 150 MHz 66 73 dBpU 6 300 MHz 41 55 dBpU 3 450 MHz 58 55 dBpU 7 900 MHz 38 53 dBpU 2 2 More 4 750 MHz 51 88 dBpU 8 Figure 3 30 Peak Table 5 Peak Track Set the state of Peak Track to On the system will search the Peak with the change of the wave automatically Otherwise the peak marker will stay on the firstly searched frequency time 3 3 3 Multi trace Function TRIG Press TRACE key the submenu of it will appear which is shown as figure 3 31 There are three traces that
50. conditions user need to adjust attenuator manually Add or subtract the attenuator value and view the constellation whether it is improved or not Until user get the satisfied output Amplifier Press this soft key User can enter the submenu of it and set the state of the pre amplifier of the instrument The default state of amplifier is auto 5 06 06 29 15 28 49 Es 64 Qan Symb 6 875 MS S Amplifier BER Pre FEC lt 1 0E 9 e e PS 4 4 ES e futo BER Post FEC lt 1 0E 9 a B gt On MER 38 6 dB ENM 14 8 dB gt gt m EUM 0 8 z off PJ 0 2 a X s s QE 0 0 Al 0 2 a e SNR 42 5 dB CS 42 4 dB a X CI gt 34 dB Freq Offset Y E kK 2 e 1 06 KHz Real Symb x h w 6 875 MS S SYMB A FEC STREAM m Return Time 0 0 50 CENT 500 000000 MHz Att 10 dB Figure 6 12 Amplifier Submenu Qam Select The instrument supports QPSK 16QAM 32 QAM 64 QAM 128 QAM and 256 QAM User can make a choice in the submenu of QAM Select which is shown as figure 6 13 IDI 06 06 29 15 29 27 64 Qan Symb 6 875 MS S C Type 1 BER Pre FEC lt 1 0E 9 p y E 16 Qan BER Post FEC lt 1 0E 9 e 32 Qam MER 38 8 4B ENN 15 0 dB s x P n PJ 0 3 o a QE
51. dBm PEAK Log 10 dB Save 1 Transmit File gt Delete File View Preview gt sis ae eet Return SPAN 1 000 GHz Wm SWEEP 20 ms fitt 10 dB CENT 500 MHz RBU 3 MHz UBU 1 MHz Figure 8 5 Save Menu Transmit File Transmit the signed pictures to the PC or flash disk After pressing this soft key in the submenu of it you can choose to send the picture to PC through RS 232 or to USB Disk see figure 8 6 If choose USB Disk the USB Disk should be connected well before starting the instrument If RS 232 is selected make sure that PC has been connected well to the instrument and then run the bmp exe in the PC which is provided with the instrument Figure 8 7 is the interface of bmp exe After setting the store path press Start The picture will be transmitted from the instrument to the PC Delete File Delete the signed pictures After pressing this soft key the system will give the notice Really del the file s press ENTER key to confirm the deletion Before run the Transmit file and Delete file operation use should select files firstly by View soft key IHI 06701719 15 51 24 Ref 98 8 dBpU PEAK Log 10 dB BMP 1 RS 232 USB
52. dBn 4 aBpy CENT 52 500 MHz SPAN 8 000 MHz ft RBU 100 KHz UBU 100 KHz SWEEP 20 ns fitt 25 dB Return Figure 5 11 Amplitude Unit Menu Chapter 5 CATV Analyzer Figure 5 12 Amplifier Settings in CATV measurement 5 5 Channel Measurement Channel measurement measures a single channel s characters Channel measurement mode support 12 measurement items which are shown as Figure 5 13 IDI 06 10 03 12 05 55 Sate Li 06701718 09 05 26 Ref 43 8 dBmnU SMPL Log 10 dB Camplifier Ref 103 8 dB SMPL Log 10 dB CATU Meas EN ESA DIF Gain gt On DIF Phase gt In Channel Uff Response gt aT l Mili il ia MIU M STi f CENT 52 500 MHz SPAN 8 000 MHz gt CENT 500 000 MHz SPAN 8 000 MHz E RBW 100 KHz UBU 100 KHz SWEEP 20 ms Att 25 dB RBW 100 KHz UBW 100 KHz SWEEP 50 ms Att 45 dB Prev Menu Channel Return 3 3 More gt c Page 3 3 Figure 5 13 Channel Measure Root Menu 5 5 1 Channel Select User can input the channel number frequency by inputting the digital number turning the knob or pressing
53. deb 5 13 User Channel Scan Menl itinere aaaea iar R aapear inin 5 13 Analog Channel Scan Fesult iiir eee e tido 5 13 Digital Channel Scan ReSult coccion Aaa iei 5 13 Favorite Chantel I 5 13 Create Favorite Channel viciosa ot di 5 14 Favorite Channel Scan ete tenere mre RE R aa aa aa A PRECES ERE daa aea RELEE 5 14 FCG menu a eimi ipe ep tette dedo iuit e WD Ru RID RE 5 14 een AU E 5 14 The Contents of the FOC Report e 5 15 Digital Aue 6 2 Bre ar Mui PO 6 2 Constellation of 6G4QAM after Zoom In enne nan rr rra 6 2 BUE 6 3 Statistic Graph T 6 3 otatisticView Menu 5 e eee eot me tei eo e RE e air dog te dede 6 3 Equalizer Display rrr er RR RC ie 6 3 Equalizer Coefficient Display 2 5 e reote esee tne rice ie oec ee N david de Eus 6 4 Frequency Response Display iii 6 4 Group Delay Dis play cisco E E atra 6 4 Parameter Settings sss titi id 6 4 Amplifier SUBMENU ia A a aii 6 5 Modulation MoOde 0 Riiie a o 6 5 A OR A 6 5 Ie uAUIDT 6 5 Tracking Generator mlenu ee iiie tro ER tr ia 7 2 TG connection diagrari iii cte cre erede ede i ded tede eve de dee a dede ede eee dae de dn Orga dece 7 2 Tracking Ot eneldo T E 7 2 Two Marker Display Mode 2 eio ieri cas 7 2 Tested Component Connection diagraM oocoonoccccnococcn
54. directory of USB disk connect it to the instrument and then reset the instrument Press CONFIG key on the front panel to enter the menu display as figure 8 2 b the Press Service soft key and select USB then the update will start 8 5 Chapter 8 Other Functions and Settings LJ 06701719 15 51 41 10 dB Ref 98 8 dBpU PEAK Log Update RS Update USB Return CENT 500 MHz SPAN 1 000 GHz EE RBU 3 MHz UBU 1 MHz SWEEP 50 ns fitt 10 dB Figure 8 17 Update Menu Note Make sure that the charger has been connected well before update Otherwise if the battery is exhausted during the update course the software of the instrument may be destroyed and can t be recovered except sending the instrument back to us 8 4 Other Functions System Reset The RESET key on the front panel can realize the system reset 8 6 9 Appendix 9 1 Specifications Frequency Specifications Chapter 9 Appendix Frequency range 1 MHz 1000MHz Frequency reference Aging 1 x10 year Stability 2 x10 Temperature stability 2 x10 0 50 C Marker count accuracy S N 25 dB RBW span 0 01 Accuracy 2 x10 1count Counter resolution 1 Hz Frequency span Range 0 Hz zero span 200Hz 1000MHz Resolution 4 digits Sweep and trigger Range 20mS
55. existed while saving the file Press ENTER to confirm or ESC to Overwrite Anyway cancel 55 Please Select File s First Try to delete or transmit file s before selecting Select file s firstly them 56 Really del the flie s Prompt user to confirm Press ENTER to confirm or ESC to cancel 57 Really Trans the flie s Prompt user to confirm Press ENTER to confirm or ESC to cancel 58 Stop FREQ must The limit line frequency setting is illogicality Set the start frequency smaller than Greater than start stop frequency 59 Low Battery The electrical voltage is insufficient while user try Plug in the charger to update the software 60 Doesn t support USB Devices Some DS8821 don t support USB devices It is inextricable 61 No USB devices detected Before transmitting data to USB disk the USB Plug the USB disk and reset the disk must be connect well system 62 UpDate File is half baked The update file is insufficient Connect to us for update 63 Copy Finished The file copy from DS8821 to USB disk is User can go on to do other finished measures 64 65 Count is closed The count will automatically change to Off while Don t change the RBW to smaller user set the RBW to smaller than 3kHz than 3kHz if you need the count On 66 Can t trig a line Can t find line synchronization signal Perhaps Decrease the attenuator value the signal is too weak 67 Turn Off HFC In HFC mode user can t open peak table
56. far as it will go gt When removing the plug from the electrical outlet first turn the power switch OFF and then pull it out by gripping the plug Do not let the power cable pull out by itself Make sure your hands are dry at this time gt Before turning on the power be sure to check that the supply voltage matches the voltage requirements of the instrument Be sure to plug the power cable into an electrical outlet which has a safety round terminal Grounding will be defeated if you use an extension cord which does not include a safety ground terminal Do not use this instrument with the case open Do not place objects on top of this product Also do not place flowerpots or other containers containing liquid such as chemicals near this product When the product has ventilation outlets do not stick or drop metal or easily flammable objects into the ventilation outlets When using the product on a cart fix it with belts to avoid its drop When connecting the product to peripheral equipment turn the power OFF Don t throw the battery into the fire or it ll explode v VVV V VV 1 II INDEX Contents VERO CU CTI ON pee A 1 1 Tiles Prepare tor Use died nen ec e REP EE RENE RR RE ER ER REM P GERI ERES 1 2 1 1 1 Check the Instr ments ooi teer A aire eres 1 2 1 1 2 About the Charger coacciones ree iat 1 2 1 2 Abott the ser Mantial 5 tt
57. iei aran 1 2 1 9 ESD Electrostatic Discharge e erem eerie ER e trai Tn p DEI EIER 1 2 1 4 Technical Support and other ServiceS oooocccoononicononocanonononcnanonnnn nono nn non nn nn nano nennen nennen enne en ne nren nenne enne nnns 1 2 Getting Started Ec 2 1 Dd O A Se RE E A e EO S ee set 2 2 2 1 1 The S bassembly of Front Panel inrer ADD e es 2 2 2 12 The Front Panel Keys oii tiere Dai pesado i aE a ar de doe re 2 3 2 27 Rear Palta ade dada lla toes EAE 2 5 2 30 Screen IntOFmoaliOr 2 ote cde icem dir data 2 6 2 3 1 Spectrum Analyzer Screen niei A fee ted eve A ede dene Peek ad 2 6 2 3 2 QAM Analyzer WindOW itera E Re rende ene dne xp rede ee denen 2 9 AREE AUI 2 11 Basic Measurement A M D 3 1 3 13 Basic Funcion ii ai pia 3 2 A O 3 2 SEV AS O OO 3 2 y uS 3 3 3 2 Basic Parameters Settings tette dancuenkeeenpusendhanes seuchewesacberevsnedeats 3 7 321 Band Width nie eel RT ped dd 3 7 3 2 2 Sweep Mode Sweep Time and Hold sssseseeeneene nennen enne nene nennen nennen nnns 3 8 9 2 9 AUTO 3 caet ee ect ett um mente un unie 3 9 3 2 4 Mode of Trigger 1 ideo donent rete eter de Ier erede Pede dete Ex pedet ende idealen ng Ea Ede rna 3 9 3 3 IBASICLUSAGES M 3 11 3 39 12 Mark Operation it id des 3
58. next page of settings menu man 06 06 29 15 28 01 64 Qan Symb 6 875 MS S L Settings BER Pre FEC 1 0E 9 E 5 E 4 Centr Freq BERCPost FEC SERIES amp e 3 j 2 Sub Rate MER 38 2 dB Ti Many ENM 14 4 dB x P 4 x TIU EUM 0 8 z Atten mE Manu PJ 0 2 gt amp 4 ES es QE 0 0 ys Al 0 1 ES gl x s n a Amp lif ier gt SNR 42 1 dB 3 cs 41 4 dB E gt Modulation CI gt 34 dB Mode gt Freq Offset x 5 3 1 11 KHz Return Real Symb Pv n E A 6 875 MS S SYMB A FEC A STREAM A amp 12 More gt Time 0 0 2 CENT 500 000000 MHz Att 10 dB a First Page IDI 06 06 29 15 28 07 64 Qam Symb 6 875 msys Settings BER CPre FEC MER Th 1 0E 9 ha 4 K s GE Mana BER Post FEC lt 1 0E 9 4 2 x BER PRE Th MER 38 7 dB E uto Man ENM 14 9 dB x zT EUM 0 8 x BERPOST Th Emm Manu PJ 0 2 o a EE QE 0 0 e Al 0 2 z A E 7 p 3 Standard gt SNR 42 3 dB CS 42 4 dB x a 5 4 s Polarity gt CI gt 34 dB Freq Offset z 1 10 KHz Default Real Symb e gt a a 6 874 MS S SYMB A FEC A STREAM A
59. rate offset is less than 50KS S and frequency offset is less than 100KHZ the demodulation system can successfully adjust itself to match the signal Settings User can set the parameters such as center frequency symbol rate standard type etc in the submenu of this soft key 6 2 Power Mea gt Provide a directly way change from QAM analyzer to channel power measurement Parameter gt Provide constellation diagram analysis and display some parameters for analysis result This function is still under development The instrument displays the measurement results on the left of the screen including Bit Error Rate BER Pre Fec BER Post Fec Modulation Error Ratio MER Estimate Noise Margin ENM Error Vector Magnitude EVM Phase Jitter PJ Quadrate Error QE Amplitude Imbalance Al Frequency offset Freq Offset and Real Symbol Rate Real Symb At the bottom of screen THE INSTRUMENT shows the lock status of symbol SYBM forward error correction FEC and stream STREAM 6 2 Constellation Diagram Press the Constell soft key the submenu of it will appear ID 06 06 29 15 25 22 64 Qam Symb 6 875 MS S igan Const BER Pre FEC lt 1 0E 9 ca i E Ki gt ES Refresh BER Post FEC lt 1 0E 9 a s 2 Grid MER 38 7 dB EGE ort ENM 14 9 dB E e EUM 0 8 y Temp
60. rum Bd al On CENT 96 0 MHz SPAN 100 0 MHz MIES Noise Hz XRBU 300 KHz UBU 300 KHz SWEEP 50 ns xftt 25 dB e 1 95 4 MHz 104 23 dBpU 5 67 4 MHz 54 49 du J 2 99 6 MHz 101 30 dBpU 6 134 4 MHz 45 23 dBpU 3 91 0 MHz 101 25 dBpU 7 56 4 MHz 45 11 dBpU 2 2 more gt 4 123 0 MHz 54 05 dBpU 8 Figure 7 6 Testing result Chapter 8 Other Functions and Settings 8 Other Functions and Settings main points of this chapter O System calibration O System config O Picture saving O Software update comer __JL__ OE Er A COMPETE on CAL OUT Chapter 8 Other Functions and Settings 8 1 System Calibration For the analyzer to meet its specifications and characteristics the self calibration routines should be performed periodically or whenever the ambient temperature changes System calibration includes frequency calibration and amplitude calibration Frequency calibration is to rectify the frequency error caused by IF filter Amplitude calibration is to rectify the amplitude error which can be caused by window functions of different RBW or attenuators so Amplitude calibration should be taken with different RBW or attenuators Allow the analyzer to warm up for 30 minutes before performing the following calibration steps Connect the CAL OUT and RF INPUT on the front panel by the BNC B
61. span 2 Rotate the knob The step change is 1 500 of the span 3 Manually input the number user needed When normal marker is On user can press Mrk To Center Mrk To Ref Lvl to set the frequency amplitude of the marked point to center frequency reference level IDI 06 01 16 15 49 16 MKR 150 00 MHz og 10 dB Ref 78 5 dBpU PEAK Li 66 52 ABpU Normal 1 Marker 150 00 MHz Delta Mark Fixed Mark On 7538 Marker To Center Marker To Ref Lul hi ALL off 1 2 More gt CENT 150 00 MHz SPAN 10 00 MHz mm En RBW 100 KHz UBU 100 KHz SWEEP 50 ms ftt 10 dB a Before Press Marker To Ref Lvl IDI 06 01 16 15 49 30 MKR 150 00 MHz Ref 66 5 dBpU PEAK Log 10 dB 66 52 dBpU Normal 1 Marker it 150 00 MHz Mkr Normal Delta Mark Fixed Mark On 7538 Marker To Center Marker LN To Ref Lul All Off 1 2 More gt CENT 150 00 MHz SPAN 10 00 MHz mm ES RBW 100 KHz UBW 100 KHz SWEEP 50 ms ftt 10 dB b After Press Marker To Ref Lvl Le 06 01 16 15 49 44 MKR 150 00 MHz Ref 76 5 dBpU PEAK Log 10 dB 66 53 dBpU L Normal 1 Marker 150 00 MHz Delta Mark Fixed Mark on E Marker To Center Marker To Ref Lul l 1 2
62. the Analyzer Noise Correction is 6 87dB It can be ignored when A 10dB The difference A will be calculated as 0 7dB when it is lower then 0 7dB 2 Gate Measure With option 3 user can turn Gate on and measure channels CCN non interfering without turning off the modulation User can select one line without modulation information to measure the CCN without interfering signal The detail shows as figure 5 21 and 5 22 IDI Ref 93 8 dBpU SMPL 10 dB E CCN J 41 Input Name 13 li Return 06 06 05 11 02 54 Log fidd fitt i 4M Sub ate T WE Measure CENT 179 00 MHz SPAN 8 MHz M Gate RBU 30 KHz UBU 100 Hz SWEEP 64 us Att 25 dB F E ort Chamel 7 C 123 71 dBpU N Nc 19 89 2 5 0 38 0 dBpU Nc 49 04 dBpU 1 2 More gt CCN 52 67 dB Figure 5 21 C N Gate Measure IDI 06706705 11 03 08 10 dB Ref 93 8 dBpU SMPL Log E CCN Line H Field EE Even A N Average M y A A n On 033 A al Y Noise BU Emm Man View ES via CENT 179 00 MHz SPAN 8 MHz gt RBU 30 KHz UBU 100 Hz SWEEP 64 us Att 25 dB F Chanel 7 C 123 71 dBpU N Nc 19 89 2 5 0 38 0 dBpU Nc 49 11 dBpU 2 2 More gt
63. the Last Next channel The arrow will stay Next Chan 3 Analog 61 250 MHz Return e on the current position of the Last Next channel a Page One 5 3 Chapter 5 CATV Analyzer Li 06 10 03 12 02 08 Ref 43 8 dBmU SMPL Log 10 dB D Editor 1 gt Channel NO 1 Channel Caption pS 1 Lazt Chan fAnalog Digital fa log Standard PAL D Suppress Modulate Type Drop Vertical Next Chan Carrier Center Frequency 49 750 MHz fiudio 1 Offset 6 500 MHz fiudio 2 Offset 6 850 MHz Channel Bandwidth 8 000 MHz Symbol Rate a Depth Modulation Gate OFF Depth Modulation Field m Depth Modulation Line Ses Power Frequency 50 Hz CLDI Field Odd CLDI Line 19 CLDI Signal CCIR LINE17 CENT 52 500 MHz SPAN 8 000 MHz EEE RBU 100 KHz UBU 30 KHz SWEEP 20 ms Att 25 dB Last Chan Next Chan Z Analog 57 750 MHz Return Figure 5 8 Channel Edit Menu Delete Delete the selected channel After press it the system will give the note Delete channel anyway Press ENTER to confirm the delete operation or press ESC lto cancel the command Sort by Frequency Sort all the channels by the carrier frequency of channels Save and Return After edit the TV plan press Save to confirm the input or press return to exit the TV Edit menu Delete Delete the selected TV plan The active plan can t be deleted Downlo
64. the reference line before start Press Measure scanning the standard channels 07 Input Channel NO Clue you to input a channel NO Input a channel NO and press Enter to Continue Enter 08 Visual Freq MHz Clue you to input a carrier frequency Input a frequency and press Enter Enter to Continue 09 No Channel Table User channel scan without a channel table Found a user channel table by auto or manus 10 Table is Full When founding user channel tables by manus Delete inutility channels the number of the channel exceeds the limit 11 Channel Added When add a user channel success gt 12 Invalid Frequency When add a user channel the input frequency is Input Range 1Mz 1000MHz out of range 13 Channel Deleted When delete a user channel success m 14 Invalid Channel When add a user channel the input channel NO Channel NO range 1 199 is out of range 15 Already Exist When add a user channel the input channel is Press Enter to overwrite ESC to Overwrite Anyway already exist cancel 16 Remove RF Input Base noise calibrate with a RF input Remove the RF input 17 No Such Plan In the case of FCC use a plan which doesn t Found the plan exist 18 Select Time 1 If not measured automatically select Time1 Select Time 1 If measured by manu 19 20 21 Choose FM First Changing the FM gain Change the modulate mode from AM to FM 22 Turn
65. then user can get the average power of the noise It will take the place of the amplitude to display on the up right of the screen 8 Noise Hz Set Noise Hz to On state the difference between current amplitude and the average noise power will display on the screen 3 3 2 Peak Operation WINDOW Rm IDI 66 01 16 16 13 34 MKR 150 000 MHz Ref 78 8 dBpU PEAK Log 10 dB 66 54 ABpU Marker 150 000 MHz Peak 1 1 Next Peak Next Peak Right Next Peak Left Haker To Center Maker To Ref Lul IA AT CENT 150 000 MHz SPAN 1 000 MHz gt RBW 30 KHz UBU 30 KHz SWEEP 50 ns fitt 10 dB Figure 3 29 Peak Menu 1 2 More gt 1 Peak Search If there is no marker set to On the system will search the peak signal in the span and set marker on it when user press the PEAK key 2 Next Peak Next Right Peak and Next Left Peak Next Peak Search for the hypo peak value that is lower than the marked one Next Right Peak Search for the hypo peak value on the right side of current marker Next Left Peak Search for the hypo peak value on the left side of current marker 3 Marker to Center and Marker to Ref Lvl When there is only one marker is On press Marker To Center Marker To Ref Lvl can set the frequency amplitude of current marker to
66. user can choose A B or C User can switch between these trace by press Trace soft key What are called three traces are the different waves of the same input that only were viewed in different time and different parameter settings IDI 06 01 16 16 14 14 Ref 78 8 dBpU PEAK Log 10 dB Trace 1 Trace EH c Write A Vieu A Blank A Max Hold un N H Detector gt CENT 150 00 MHz SPAN 10 00 MHz m RBU 100 KHz UBU 100 KHz SWEEP 50 ms fitt 10 dB Figure 3 31 Trace Menu 1 Write Write is the default state of all the three trace In this mode the wave is continuously refreshed 2 View Press View soft key the trace will be hold Change to other trace and user can see the changes of the wave with the different parameter settings Figure 3 30 gives an example of View soft key The trace A is in the View state and the reference level of it is 68 8 dBpV When 3 14 change the reference to 88 8 dBuV only the trace in Write Mode changed while trace A keeps unchanged IDI 06701716 16 15 31 og 10 dB Ref 68 8 dBpU PEAK Li amplitude Ref Level 68 8 ABpU Ref Level Atten Auto Man Scal EP Line Amp Units gt Scale Div h CENT 150 00 MHz SPAN 10 00 MHz RBU 100 KHz UBU
67. user can measure the CLDI The chrominance to luminance delay inequality measures the time delay between the low frequency luminance component and high frequency chrominance component of a modulated pulse in the composite test signal There four signals can be used to test CLDI In PAL standard CCIR Line 17 and UK ITS 1 are recommended while in NTSC standard the FCC Composite Test Signal and the NTC 7 Composite Signal can be used Because there is a pre distortion in the testing signal an offset of 170ns is added to the result mo 4ro NAAA UA LAA moore me i 1 i n 00 47 12 0 22 0 26 0 32 0 40 0 44 0 48 0 52 0 56 0 62 0 m a Matrix Signal CCIR Line 17 ESO 280 mV mo 4co 8 140 mV i i i i Im i H TTT ph T t imp TP MAT Ml LS TT TIME i Low i j i in 00 47 12 0 22 0 26 0 30 0 40 0 44 0 48 0 52 0 56 0 62 0 ni 33 7 b Matrix Signal UK ITS 1 5 10 800 ia 3 714 3 mV 700 642 9 mv 600 514 3 mV soo V 400 4385 7 mV T 300 257 1 mV A G 200 E 128 6 mV 100 in mV 04 100 200 i i que 7 nps 300 frrr H AL UL mor 30 0 33 9 372 46 0 520 580 00 47 12 0 i i 490 55 0 61 7 c NTC 7 Composite Test Signal 800 2 ji 714 3 mV 642 9 mv 514 3 mV mo ro c 8 200 i ps 7 i n ps 300 nau i T yn riri LASSA AAI Y ALA AA Wi
68. 03 138 908 97 Ref 38 8 dBnU PEAK Log User J Analog Digital Count on E CENT 346 75 MHz SPAN 8 000 MHz RBU 300 KHz UBU 100 KHz SWEEP 20 ms Att 10 dB Return Figure 5 42 User Channel Scan Menu IDI 06710717 11 EB n Ref 100 2 dBpU PEAK Log 10 d User Digital Count On IN rH 00 tre um 100 KHz SUP M gi 30 dB p gt Channel DS 1 Vis Min 37 dBpU Uisual Cent Freq 49 75 MHz Max Min 60 51 dB Carrier Pouer 52 46 dBpU UZA Max 22 14 dB Return Visual To Audio 4 12 18 dB UZA Min 25 98 dB Figure 5 43 Analog Channel Scan Result 06 10 17 11 EE 526 3 102 0 dBpU AVG Log 10 di User Analog Count on ET CENT 363 00 MHz SPAN 8 000 MHz ig RBU 300 KHz UBU 1 MHz SUEEP 100 ms Att 30 dB p gt Channel Z 21 Visual Cent Freq 331 00 MHz Max Min 14 1 dB Carrier Pouer 77 78 dBpU Return Visual To Audio a Figure 5 44 Digital Channel Scan Result 5 6 3 Favorite Channel Favorite channel scan enables user to measure 8 channels at a time 11 06 0171 us eh ES 9 Ref 86 2 dBpU SMPL Log Favourite Measure Fay Set 1 Fau Enter CENT 601 75 MHz SPAN 8 000 MHz E RBW 300 KHz UBU 1 MHz SWEEP 50 ms Att 20 dB Return Figure 5 45 Favorite Channel Create a favorite channel should first press Fav Set n to sel
69. 1 0E 9 EN 21 3 n Constell gt BER Post FEC lt 1 0E 9 a S 3 P Al a B Statistic MER 38 7 4B ENN 14 9 dB h gd me bl a Eun 0 8 z Equalizer PJ 0 3 Ed Li E a x QE 0 0 Al 02 elits js 3 y a t Initialize SNR 41 8 dB C 43 3 dB amp gt 2 d Settings gt Cl gt 34 dB Freq Offset E ES e ms E ES E 1 10 KHz Return Real Symb F x A E x 3 5 875 MS S SYMB A FEC STREAM E p 172 More gt Tine 0 90 28 CENT 500 000000 MHz Att 19 dB b Second Page Figure 6 1 Digital TV Menu Constell User can change the constellation diagram display state in the submenu of this soft key such as Zoom In Zoom Out and Display Mode etc Statistic Put out the statistic results of MER BER Pre FEC and BER Post FEC Equalizer Put out the coefficient of the equalizer In the submenu of this key User can choose the equalizer mode Initialize Reset all auto adjusted parameters and then adjust them again In the initialization period the demodulation system will diagnose the signal automatically to access the symbol and frequency offset According to these offset information the system will adjust the demodulation process and system coefficient to match the signal So if the changes of signal cause the system unable to demodulate correctly user can press Initialize soft key to initial the demodulation Generally speaking if the symbol
70. 11 A Peak OperatiOn 5 edd o Re err RU er ERAT rn Itn rer n ren RH inrer eie 3 13 3 3 9 Multi trace Function sane rcr ae le e ae 3 14 Rc MERI erede E ION 3 14 mdp 3 15 3 3 6 Display Line and Display Delta cerent erint denne etate ente dnt reitera Le denen ende bares 3 15 3 3 7 Temperature and Voltage oioococoonnoninnner nene 3 16 33 8 Title eee te non eee epe eee eed eb eet qn e peer eret 3 16 3 39 DOUDlO WIRD Wie ascos Lx 3 16 A xiliary Meas remM E S cesaucvncssarecnss aauedcnearchessedcueccsaveusesubfadivenssbcecuedeesevanencecen 4 1 4 1 Channel Measurements 2 1 inten ce perc eed e pate ect ed Ede dote cde Eee greed eo tes deste ei eerie oput 4 2 4 1 1 Unit Exchange O vae De EE Tes u P Eoec E cA Ere uua Pea ecce o o Edd se se Rea Se sec eR LER Tenue oct 4 2 4 1 2 Channel Measurements Menu cccccceeeeeeeeceeceeeeeeeceaeaeeeeeee ene nn nn n nn nn nan RR RR ran nn nn nan testet nlsi sinn nnns s sns ne na 4 2 4 1 3 Occupied Bandwidth eo ret e e ERR ertt NR RUPEE ETE 4 3 4 1 4 Adjacent Channel POWer rientro dee a ende ege ee dene e a ete a oin 4 3 4 2 ENEE 4 3 4 21 Demodulation Mode niii etiem m neret n eo eade te a du ek io tela and 4 3 4 22 ASTON Oni c x sere eet tete ee ee ER cie urbe c edet In mri e ee ttle te desis caves 4 3 LM CA ee 4 3 4 3 Input Impedatice eR eerie o Ue UR
71. 55 000 MHz SPAN 8 000 MHz T RBU 100 KHz UBW 30 KHz SWEEP Z0 ms fitt 5 dB a Chapter 5 CATV Analyzer D 06 10 03 13 25 28 Ref 25 8 dBmU AUG Log 10 dB E View 1 107 Carr Lev 4 62 37 70 Page Up Carr Freq Hz 49748079 160249569 Sndi Leu dB 11 48 17 00 Sndi Freq Hz 6497342 6499981 Snd2 Lev dB Snd2 Freq Hz FM Dev KHz 29 29 4 Depth Mod 7 87 Print ICCN dB 2 6 43 6 Hum Zz 41 3 6 6 Cross 4B 43 4 22 5 CTB Leu 4 0 CTB Freq 0 CS0 Lev 44 5 ICSO Freq 1248000 ICLDI 1399 IDG d 5 DP 30 Resp dB 1 5 1 9 dBnU 273 CENT 355 000 MHz SPAN 8 000 MHz LLL Dem RBU 100 KHz UBU 30 KHz SUEEP 20 ms fitt 5 dB b IDI 06 10 03 13 28 07 A Ref 25 8 dBmU AUG Log 10 dB E View 121 122 123 124 Chan Power 17 3 18 9 21 3 23 4 Page Up BER Pre 1 0 E 9 1 0 E 9 1 0 E 9 1 0 E 9 BER Post 1 0 E 9 1 0 E 9 1 0 E 9 1 0 E 9 MER dB 30 2 30 5 30 8 33 2 EUM 7 2 0 2 0 1 9 1 5 Chan Pouer Print BER Pre BER Post MER dB EUM 7 Chan Power BER Pre BER Post MER dB EUM 7 dBnU 3 3 CENT 355 000 MHz SPAN 8 000 MHz LLL Tenien RBW 100 KHz UBU 30 KHz SUEEP 20 ms fitt 5 dB c Figure 5 50 The Contents of the FCC Report 5 15
72. Chapter 7 Tracking Generator and HFC Analyzer 6 Digital TV Option 4 Main Points of This Chapter Constellation diagram Statistical Graph Display Equalizer display Reference settings 6 1 Chapter 7 Tracking Generator and HFC Analyzer 6 1 Summarize The instrument can measure the main specs of digital signal such as display constellation diagram BER MER EVM etc After pressing MODE key on the front panel and select DTV Analyzer soft key the submenu of it will appear which is shown as a of figure 6 1 By pressing 1 2 More gt soft key User can enter the next menu of digital TV which is shown as b of figure 6 1 IDI 06 06 29 15 25 08 i 1 64 an Synb 6 875 MS S Qan BER Pre FEC 1 0E 2 3 x x s Power Mea gt BER Post FEC 1 0E 2 z a 2 4 MER 38 7 dB ENM 14 9 dB x x E a EVM 0 8 z Pj 9 3 DP a t gt E ES 4 QE 0 0 RI 6 2 z B ES ds SNR 42 0 dB C 43 1 dB gt x CI gt 34 dB Freg Offset E Y Y E a 1 11 KHz Return Real Symb A e ES a s E 6 875 M3 5 SB A FEC STREAM gf mug 272 Hore gt Time 0 0 41 CENT 500 000000 MHz Att 10 dB a First Page 11 06 06 29 15 24 55 a i 64 Qam Symb 6 875 MSS am BER Pre FEC lt
73. DL Delta On Off Temper Select Voltage OK Title gt Return NORMAL Marker Settings Mkr Normal Count On Off Delta Mark Select Mkr 12345678 Fixed Mark Marker 1 On Off Marker to Center Mark Table On Off Marker to Ref Lvl Mark Noise On Off All Off Noise Hz On Off 1 2 More gt 2 2 More gt Mode Select Spectrum Analyzer gt Settings Channel Table gt CATV Analyzer gt Channel Meas gt 1 Select Chan Freq OK QAM Analyzer gt Scan Channel gt 2 Frequency Setup gt Tracking Generator gt Cal Base Noise Amp Unit gt Return Sys Meas gt 3 Amplifier gt TG On Off Return dBm TG Level Constell gt 4 dBmV Power Cal Statistic gt 5 dBuV Normalize Equalizer gt 6 Return Mark Abs Ret Initialize Return Settings gt 7 Auto Return On 1 2 More Off Return Power Mea gt Return 2 2 More gt 2 13 Chapter 3 Basic Measurement 1 Channel Select z Listen OFF Listen ON gt NN c FM DEV gt Return Depth MOD Add Att Carrier Lvl Freq Sub Att Prev Menu Cycle Meas 1 3 More gt Normal gt ine TV Line Field Odd Even Return Return Return Add Att Sub Att Counter On Off Max Hold On Off Carrier Noise gt HUM gt Return ine Crossmo Add Att Field Odd Even CSO CTB gt Sub Att Average On Off Leakage gt Measure Noise BW Auto Manu Prev Menu Continue View Meas Vid 2 3 More gt Gate On Off 12 More gt 2 2 More gt Return Add Att Sub Att Measure Time FFT eturn Add Att Sub Att
74. DS8821 SPECTRUM ANALYZER OPERATION MANUAL Deviser Part No DK118208821 Version 2 28 Applicable models DS8821 Serial Spectrum analyzer Software version 2 28 Firmware version 1 28 O TianJin Deviser Electronics Instrument Co Ltd All rights reserved Printed in CHINA Safety Summary 1 Safety Symbol The following safety symbols are used throughout this manual Familiarize yourself with each of the symbols and their meaning before operating this instrument CAUTION The caution sign denotes a hazard It calls attention to a procedure that if not correctly performed or adhered to could result in damage to or destruction of the instrument Do not proceed beyond a caution sign until the indicated conditions are fully understood and met WARNING The warning sign denotes a hazard It calls attention to a procedure that if not correctly performed or adhered to could result in injury or loss of life Do not proceed beyond a warning sign until the indicated conditions are fully understood and met 2 Basic Precautions Please observe the following precautions to prevent fire burn electric shock and personal Injury gt Use a power cable rated for the voltage Be sure however to use a power cable confirming to safety standards of your nation when using a product overseas Do not place anything heavy on top of the power cable gt When inserting the plug into the electrical outlet first turn the power switch OFF and then insert the plug as
75. Disk Return CENT 500 MHz SPAN 1 000 GHz EE RBU 3 MHz UBU 1 MHz SWEEP 50 ms fitt 10 dB Figure 8 6 Transmit Menu fic bmp x Baud Rate 115200 y Browse COM com v Path fe Figure 8 7 Interface of bmp exe View Press this soft key to select the pictures you want to deal with Run the knob and press ENTER key to finish the selection and press ENTER key again to release the selection You can choose one or several pictures in this step Preview View the saved pictures on the screen page by page To preview the pictures you don t need to sign them beforehand All stored pictures can display on the screen by pressing Page Up or Page Down soft key The related information about the current displayed picture will display on the right side of the screen such as the file name the saving time and the position of the current picture 8 3 Chapter 8 Other Functions and Settings VN 06 01 19 15 51 14 Ref 98 8 dBpU PEAK Log 10 dB I Save 1 hane Dale Tine hitleChar ENTER Transmit File gt wi 6 i 15 49 39 4 2006 1 19 15 49 52 Delete R 1 15 50 2 File d 2006 1 19 15 50 18 13 2006 1 19 15 50 25 y della E es O o dip HP Return CENT 500 MHz SPAN 1 000 GHz M RBU 3 MHz UBU 1 MHz SWEEP 50 ms Att 10 dB Figure 8 8 View
76. E EE A Meere teet We ed s Heec Edu eA ebrium 3 15 Measures 3 15 Display Delta crt A A pe e ce dee ei du esae n Te Eee aa eT e pee eec eet 3 16 Temperature and Voltage monitor oio iei eed pene c ed tee toe qd cada n e need ee geb te Enea eue 3 16 NA 3 16 Double Window Menu a ra eae a e a cnn nene nena tesi inst heresis nlsi sien nensis ist aa ette e eee adorea aint 3 16 ZOOM Select MON aL A e daea EESE 3 17 Auxiliary Measurements Menu 22 c ecccceceeeeeeeec ee cate ee eeeeeeaeeeeeeeceeaaeaeeeeesesecaaeaeeeeeeeseaaeeeeeeseeeeaeeeeeeeeeeeees 4 1 Channel EEE cece eee aaeaeceeeeesaaaaeaeceeeeesecaaeaeceeesseeaaeeeeeeseesnceeeeeeeees 4 2 Channel Settings Menu E 4 2 Channel Power Men eiii o eni ee ee Poet ee ead dae tacde cake alcaldia es 4 2 Occupied Bandwidth M nu misrin ic Dt 4 3 Adjacent Channel Power Menu coonccccccccnononononononcnnnnnnnnnnnonnnnnnnn nn nr nn n cnn nan nn cenar rn terii n nene nennen nennen nennen 4 3 SONO aaa das das 4 3 Input Impedance MENU iii ARA EE 4 3 EINST 4 4 Mode Tall e E 5 1 CATV ROOt Mens comoda E 5 1 GAT Standard s 5 m cet ido A Ad 5 2 CATV Settings Menu 5 rere ette eee e ERI terere presb ERE ena 5 2 TV EUESHIU MMC 5 2 TV Plam Edit Men iuit decere cteet e O eae cca 5 3 Channel lle TETTE 5 3 Channel Edit Meri s 35 toten E eter P
77. E Unit J Center Frequency 20 sr Information 3 sy erri t MHz KHz Hz Puja CENT 150 00 MHz SPAN 10 00 MHz LL RBU 100 KHz UBU 100 KHz SWEEP 50 ms fitt 10 dB Figure 3 2 Frequency Unit Menu For example If user want to set the center frequency to 20MHZz press the number key 2 and 0 then choose the MHZ The change of center frequency is finished Note 1 The frequency range is from O to 1000MHz if the input is little more than OHz 1000MHz it will be treated as OHz 1000MHz 2 In most parameter input cases the information about the item and the input value will display on the screen See Figure 3 2 2 Press the Up Down key change by the step that is defined by Freq Step 3 Rotate the knob change by a step of 1 500 of the span User can take the same way to input the value of Start Freq Stop Freq and Freq Step But if the input value is Freq Step the change step of Up Down key will become to 1 500 of the span 2 Start Frequency After pressing Start Freq soft key user can change the start frequency 3 Stop Frequency After pressing Stop Freq soft key user can change the stop frequency 4 Frequency Step The default value of Freq Step is 1 10 of the span After pressing the Freq Step soft key and set it to
78. EE A colado EIER n 5 4 TV Plan Download Menu 2 cecinit prime iie donee de cd daa edd nee oe eie ene Eee dee Pe dece dede gk e Hone tiec Rhe 5 4 Frequency Set p Menu eei podas 5 4 Amplitude Unit Men s musas ars iaa 5 4 Amplifier Settings in CATV Measurement oooonncnnoccccnononcnonononcnnnonc nc nono ncnn non nnnn narran rra rra 5 5 Channel Measure Root M nu cccccceccceeeeeeeeeeeeeee teen eeceaeaeeeeeeeseceaaaeceeeeeeecaaeaeeeeeeeseeeseeeeeeseseecaeeeeeeeeetees 5 5 Figure 5 14 Figure 5 15 Figure 5 16 Figure 5 17 Figure 5 18 Figure 5 19 Figure 5 20 Figure 5 21 Figure 5 22 Figure 5 23 Figure 5 24 Figure 5 25 Figure 5 26 Figure 5 27 Figure 5 28 Figure 5 29 Figure 5 30 Figure 5 31 Figure 5 32 Figure 5 33 Figure 5 34 Figure 5 35 Figure 5 36 Figure 5 37 Figure 5 38 Figure 5 39 Figure 5 40 Figure 5 41 Figure 5 42 Figure 5 43 Figure 5 44 Figure 5 45 Figure 5 46 Figure 5 47 Figure 5 48 Figure 5 49 Figure 5 50 Figure 6 1 Figure 6 2 Figure 6 3 Figure 6 4 Figure 6 5 Figure 6 6 Figure 6 7 Figure 6 8 Figure 6 9 Figure 6 10 Figure 6 11 Figure 6 12 Figure 6 13 Figure 6 14 Figure 6 15 Figure 7 1 Figure 7 2 Figure 7 3 Figure 7 4 Figure 7 5 Figure 7 6 Figure 8 1 Figure 8 2 Figure 8 3 Figure 8 4 Figure 8 5 Figure 8 6 Figure 8 7 Figure 8 8 Figure 8 9 Figure 8 10 Figure 8 11 Figure 8 12 Figure 8 13 Notice User to Input Channel Number ssssseesseeenennenen nennen nnne
79. ENT 150 00 MHz SPAN 20 00 MHz mn on 7738 RBW 300 KHz UBU 300 KHz SWEEP 20 ns Att 5 dB d x2 in Line State Figure 3 11 Scale Div 6 Ref Offset Ref Offset indicate the reference offset level For example if the Ref Offset is set to On state and its level is set to 25dB then the reference level and the marker level that display on the screen will be changed as Figure 3 12 and 3 13 show IDI 06 11 03 09 51 27 MKR 150 00 MHz Ref 98 8 dBpU PEAK Log 10 dB 88 95 dBpU Amplitude Ref Level i Atten Lun Manuj Scal Log Line Amp Units gt Scale Div 1 Ref Offset Amplifier SPAN 20 00 MHz am On 533 UBU 300 KHz SWEEP 20 ms Att 10 dB A MAL CENT 150 00 MHz RBU 300 KHz o E Figure 3 12 Reference Level Offset Off 3 6 IDI 06 11 03 09 51 04 MKR 150 00 MHz E Ref 123 8 dBpU PEAK Log 10 dB 113 95 dBpU Amplitude e ff Ref Level t Ref Level 5 123 8 dBpU t ji qB Atten 4g Manu Scal Line Amp Units Scale Div Ref Offset REUS ore Amplifier CENT 150 00 MHz SPAN 20 00 MHz am on 338 RBW 300 KHz UBU 300 KHz SWEEP 20 ns ftt 10 dB oe Figure 3 13 Reference Level Offse
80. ENT 150 0000 MHz SPAN 500 0 KHz T RBW 30 KHz UBU 30 KHz SWEEP 50 ms fitt 10 dB b After Disp Line Shift Figure 3 35 Display Delta The default position of Disp Line is in the mid of the screen User can change the position of it by rotating the knob or pressing the Up Down Key 3 3 7 Temperature and Voltage Press Temper Voltage then user can temperature voltage message of the analyzer get the When temperature over the set value the fan will run and the flag of it F will appear on the down right of the screen When the voltage is lower than the set value the system will give an alarm If the voltage keeps on descending the system will automatically power off The system detects the temperature and voltage of the analyzer every 5 minutes IDI 06 01 16 16 20 44 Ref 77 0 dBpU PEAK Log 10 dB Measure Temperature N dB PTS 34 0 PC on im Disp Line on 73 DL Delta mmm Voltage Voltage dispaly neo CENT 150 00 MHz SPAN 10 00 MHz M xRBU 1 MHz UBU 1 MHz SWEEP 50 ms fitt 10 dB FA Figure 3 36 Temperature and Voltage monitor 3 16 IBI abc 06 01 16 16 21 03 T Ref 77 PEAK Log 10 dB Title 1 Waga O 101234567 Select OPQRSTUVWXEZIN 1 abcde ghi kImopqrstuvuxyzaR OK Characters Return to Select Pera ped t
81. EP 50 ms fitt 25 dB Channel Figure 2 6 Information Window Chapter 3 Basic Measurement 2 3 2 QAM Analyzer Window The QAM analyzer window is shown as Figure 2 7 15 17 Figure 2 7 QAM Analyzer Screen The information we can get from the screen is listed in table 2 2 18 06 06 29 15 24 55 l 1 6 875 MS S Qam BER CPre FEC lt 1 0E 9 EN n 3 Constell gt BER Post FEC lt 1 0E 9 ig T d Statistic he ES Ed Equalizer gt LI x Initialize a ri ae X E E gt d 2 Settings gt t E ES Return n x 3 x k SYMB A FEC f TREAM A mm 142 More gt Time 0 0 28 cm 500 000000 MHz t 10 dB 2 9 Chapter 3 Basic Measurement Table 2 2 Spectrum Screen information a LAM ME Modulation mode Current modulation mode 2 BER before RS The ratio of the erroneous bits that before RS decoder and the total number of transmitted decoder bits 4 5 7 BER after RS decoder The ratio of the erroneous bits that after RS decoder and the total number of transmitted bits Modulation Error Ratio Provide a single figure of merit analysis of the received signal Estimated Noise Provide an indication of the reliability of the transmission channel without switching off the Margin service EH Error Vector Magnitude Another figure of merit calculation Phase Jitter Indicate the fluctuations of sign
82. EXA Manu Atten Auto Manu Sweep Time n wae ME EXE Manul Wiper E oe EJ Manu CENT 150 00 MHz SPAN 10 00 MHz E RBW 100 KHz UBU 100 KHz SWEEP 50 ms fitt 5 dB Figure 3 20 Auto Menu 3 2 4 Mode of Trigger Press TRIG key then the submenu of it will appear IDI 06 01 16 15 46 03 F Ref 68 5 dBpU PEAK Log 10 dB Triger 1 Sueep Sigl Video TV H gt id raid CENT 150 00 MHz SPAN 10 00 MHz RBU 100 KHz UBU 100 KHz SWEEP 50 ns fitt 5 dB Figure 3 21 Trig Mode Slope 3 9 Chapter 3 Basic Measurement 1 Free Run This is the default mode of the system 2 Video In this mode user can change the level of start trigger by rotating the knob Also user can select the up down slope trigger by pressing the Slope soft key and setting it to 3 TV H option 3 In this mode the TV line trigger is selected User can change the line and set the field to Odd Even Also user can set the standard to M N or B D G I H K K1 L 3 10 Chapter 3 Basic Measurement 3 3 Basic Usages In this section we will introduce the operations of marker peak and trace etc 3 3 1 Mark Operation WINDOW Press NORMAL key the submenu of it will appear
83. HOLD Hold key Hole current wave and settings on the screen until press this key again Bandwidth setting key Trigger mode setting key AUTO Auto key Set the Auto Manu state of RBW VBW Sweep etc 4 TRACE Trace and detector select key Select the active trace A B or C and set the state of these traces Select the detector mode among the 6 modes the system provided SGL Press this key to activate a single sweep AUX AUX control key You can enter the power measure get the demodulation result of AM FM and set the limit line in the menu of this key Single sweep key 4 SYSTEM CONFIG Config key User can configure the system by pressing the corresponding soft key in the menu of this key Also you can get the serial number and software Firmware version by this key 2 3 Chapter 2 Getting Started 4 MODE Mode select key Select the mode from the instrument supported modes such as Spectrum Analyzer CATV Analyzer QAM Analyzer or Tracking Generator some modes are options PRINT SAVE Screen print save key According to the selection state of Prn Save output save current information that display on the screen to the printer memory MEAS Measure key You can get the measure result of NdB BW or display delta temperature and current voltage in the menu
84. K Left Win Select Up Down Zoom Sel On Off Window Off Chapter 3 Basic Measurement 3 Basic Measurement Main points of this chapter O Basic Function O Basic parameters settings O Essential measurement and operation methods 3 1 Chapter 3 Basic Measurement 3 1 Basic Function The basic function of spectrum is to get the frequency and amplitude characters of the input signal So the basic keys are FREQUENCY SPAN and AMPLITUDE These keys locate on the up left of the keyboard that is shown as follows 3 1 1 Frequency FREQUENCY AMPLITUDE Press FREQUENCY key the submenu of it will appear IDI 06 01 16 15 33 47 Ref 78 8 dBpy PEAK Log 10 dB Center Frequency 150 00 MHz Frequency Start Freq Stop Freq Freq Step Emm Man Perl CENT 150 00 MHz SPAN 10 00 MHz E RBW 100 KHz UBU 100 KHz SWEEP 50 ms ftt 10 dB Figure 3 1 Frequency Menu 1 Center Frequency Press Centr Freq soft key user can change the current center frequency There are three methods to input the frequency value 1 Dirrectly input the number Press the number keys the Unit menu will appear which is shown as Figure 3 2 Select the unit in this menu then user can finish the center 3 2 frequency change IDI 06701716 15 34 05 og 10 dB Ref 78 8 dBpy PEAK Li
85. Mode On Change mode into double window mode when Press Mode and then press Spectrum Analyzer the current mode is not in Spectrum Analyzer Spectrum Analyzer 23 Invalid CBW CSP When measuring CSP Power or OBW the Try to reduce the CBW or CSP Frequency parameter is not suitable 24 Please Turn Off With the peak table on trying to do follows Turn off the peak table Peak Table search the next peak next peak right next peak left move the peak point to the center or top position press normal menu 25 Please Turn Off When mark table is on trying to do following Turn off the mark table Mark Table things turn on the frequency counter normal mark delta mark fixed mark push the mark to the center to the top position search a peak 26 Please Turn Off When the frequency counter is on trying to do Turn off the frequency the frequency Freq Count the following things turn on the delta mark fixed couter mark multi marks push the mark to the center to the top position 27 Cannot reach N dB points No peak points on the screen or the peak point is Modify the center frequency enlarge on the edge of the screen the span or minish the RBW 28 Please turn the Turn on the instant function with the reference Turn on the reference line Displine ON off 29 Calibrate Failed Frequency or amplitude calibration Confirm the calibrate line is connected 30 Not Enough Space Not enough space to save pictures Delete inutility pictures 31 Pl
86. More gt CENT 151 30 MHz SPAN 10 00 MHz La RBW 100 KHz UBU 100 KHz SWEEP 50 ms ftt 10 dB c Before Press Marker To Center 3 11 Chapter 3 Basic Measurement IDI 06 01 16 15 49 53 MKR 150 00 MHz Ref 76 5 dBpU PEAK Log 10 dB 66 53 dBpU Normal 1 Marker 150 00 MHz Mkr Normal Delta Mark Fixed Mark On Marker To Center Marker To Ref Lul yi All Off ig 1 2 More gt CENT 150 00 MHz SPAN 10 00 MHz RBU 100 KHz UBU 100 kHz SWEEP 50 ms Att 10 dB d After Press Marker To Center Figure 3 23 Marker To Ref Lvl and Marker To Center 2 Delta Mark After pressing this soft key two markers will appear on the screen The start positions of these two markers are the same Rotating the knob pressing the Up Down cursor or manually inputting the frequency value can change the position the second marker The amplitude and frequency time difference between two markers will be displayed on the up right of the screen The main function of Delta Mark is to compare two signals IDI 06 01 16 15 50 32 MKR 150 0 MHz Ref 76 5 dBpU PEAK Log 10 dB 15 16 dB Normal 1 Marker 150 0 MHz Mkr Normal t Delta Mark Fixed Mark po on m Marker To Center i EAr bon pla ry NP Marke
87. Multiburst Test Signal is more common but only provides frequency response data at discrete frequencies Note that the 0 5MHz burst packet can t be resolved in a resolution bandwidth of 300KHz However 300KHz is the minimum bandwidth required for the analyzer to accurately measure burst packets greater than 4 25us If all the burst packets were the same time duration a resolution bandwidth of 100 kHz could be used The burst height would not be accurate but they all have the same relative amplitude The NTC 7 combination signal is the least ideal It would be useful for relative measurements The frequency burst s lengths are not equal and too short in duration for the 300 kHz resolution bandwidth to capture them accurately Some modified NTC 7 combination test signals have near equal pulse widths and are more suitable for this test When we press Signal soft key to choose signal mode we call both FCC Multiburst Test Signal and NTC 7 combination signal as Multiburst According to the settings of signal mode system will automatically search the suitable positions of Marker 1 and Marker 2 The positions of Marker 1 and Marker 2 can be set manually too The In Channel Response testing result that display on the bottom of the screen is calculated by the level difference of these two markers IDI 07 04 09 16 28 27 MKRA 2 000 MHz Ref 10 0 dBn SMPL Log 10 dB 1 66 dB Line 27 A la VALE CIn Ch Resp Marker 1
88. NC cable Caution Make sure that the used BNC BNC cable is the fitting of the instrument Press the CAL key on the front panel the submenu of it will appear which is shown as figure 8 1 IDI 06 01 19 15 49 39 10 dB Ref 98 8 dBpU PEAK Log Cal 1 Calibrate Freq amp Amp Calibrate Frequency Calibrate Amplitude Cal Data Vasallo po ar a Resp Data EUH or SPAN 1 000 GHz gt SWEEP 50 ns ftt 10 dB CENT 500 MHz RBU 3 MHz UBU 1 MHz Figure 8 1 Calibration Menu Cal Freq and Amp Calibrate both amplitude and frequency Cal Frequency Calibrate the frequency Cal Amplitude Calibrate the amplitude Note During the process of calibration the instrument is unable to response to the keyboard commands except the RESET key Cal Data Choose to add the calibration data to the spectrum display or not Resp Data Choose to add the frequency response data to the spectrum display or not The response data is set before the instrument leave factory and unable to be changed 8 2 8 2 System config IDI 06 01 19 15 49 52 A Ref 98 8 dBpU PEAK Log 10 dB Config 1 Serial NO 10004263 v2 08 RS 232 Baud Rate gt Set Clock tarso lt aja E oe Language Select gt E Print Save gt
89. Number i n li aa 5 5 2 Listen On Li H 1 l i leakage Press Listen ON and user can listen to the sound of n current channel Turning the knob or pressing the RB 100 Khe UnA 100 Riz SUBEP SO ms att A Prev Menu Up Down key can change the volume Channel 2 3 More gt Chapter 5 CATV Analyzer Hd 06 01 17 10 36 51 MKR 7 7 ms 7 Ref 74 0 dBpU FMU Log 10 dB 9 36 KHz Listen Listen OFF CENT 182 750000 MHz SPAN Hz T RBW 100 KHz UBW 100 KHz SWEEP 50 ms Att 10 AB Chamel 7 Volume IEI 06707714 13 44 39 MKR 23 8 ms Ref 86 6 mU SMPL Line X 1 13 720 nU Depth Mod n put per ntek fol Cont inue Return TU Line gt i H j se LR L H CENT 160 250000 MHz SPAN 0 Hz B RBU 1 MHz UBU 1 MHz SUEEP 30 ms ftt 10 dB Chamel Z7 DEPTH MODULATION 83 2 x Figure 5 15 Listen ON 5 5 3 FM Deviation va 06707714 13 44 03 MKR 3 1 ns FMU Line X 1 Ref 86 6 mU 96 04 dBpU CFM Dev Teturn Add Att 4 at
90. RR AER edes 4 3 AeA FIMIGMAC esse MEE 4 4 CATV Analyzer Diosc m 5 1 5 1 CATV Standard and System nin equ pletri cesse uen ed podere ados tees sheen den die ped cese ee d ero ate 5 2 5 2 Base Noise Calibration 5 0 conet eoe Lee ctio mestre ente uie eie Lea en ECL dee Eo bel lid 5 2 ds Ghanrnel Tables eterne t tendere tieu ttl cce uiti ibis 5 2 EEG ESOS uem 5 4 5 5 Channel Measurement 5 sa tado e pede De E unde 5 5 55 1 Channel Select usi ctt AR eise a ibo cr de cio 5 5 5 52 EE ETOD E eter mener esame e ED RE eR RENE e c eM L dc d 5 5 5 5 3 FM Deviation 0000 nie ient ane eR Ege ngu v age enden did 5 6 5 5 4 Depth Modulation MR 5 6 5 5 5 Carrier Level amp Frequency cccccccceeeesececeeeeeeeeeenaeceeeee ea aeaeceeeecaaeeaaaeaeceeeegseeaaeaeceeeseeeeeaeeeseeennaeaeeeeeees 5 6 5 5 6 Carrier to Composite Noise cupra alce 5 7 ESTNE LIS PR 5 8 5 5 8 Cross Modulation eie p e e eve A ge at eee due da De ve resets 5 8 A EA 9 1 Sio 5 8 A O 5 9 5 5 11 Chrominance to luminance Delay Inequality CLDI oooconoccccnnocicononaconanananononancnonannnncnnno emn 5 10 5 5 12 Differential Phase Gain 2 da ear da data 5 10 5 5 13 IneChannel Response inicio dto 5 11 5162 Channel SCAM ssp atadas 5 12 5 6 1 Standard Charinel 2 cta EE ld doce e ee ER inset 5 12 5 6 2 User Channel
91. U 300 KHz UBU 300 KHz SWEEP 50 ms fitt 10 dB Figure 3 10 Amplitude Unit Menu Return Choose the unit user wanted and then press the Return Soft key to finish the setting Note The change of unit will not cause the change of Log Line state 5 Scale Div The scale div is displayed on the upside of the screen In logarithm state the default value is 10dB grid After pressing Scale Div soft key user can enter the integer number from 1 to 40 or decimal number from 0 1 to 0 9 to change the scale to the state wanted The scale div can be changed by Up Down cursor or by knob too In line State The scale div state is shown as x n After pressing Scale Div soft key the submenu of it will appear User can choose x1 x2 x5 or x10 in this submenu 1 n is the ratio of voltage difference between the lowest level displayed on the screen and reference level For example when reference level is 1mV if the Scale Div is x1 the lowest voltage display on the screen is OmV while if the Scale Div is x2 the lowest voltage display on the screen will be 0 5mV No matter in Log or Line state the change of Scale Div will not change the measure value IDI 06 11 03 10 04 10 Ref 98 8 dBpU PEAK Log 10 dB dB Did 10 dB Ref Level Amplitudel fitten Auto Manu Scal Log Line Amp Units gt S
92. U seve 3 3 NamOw BW sesh cee ioe ta L c 3 3 Wide BW iere e Re te iiie et ue tete te ote as do 3 3 Amplitude Menu 2 DEDE RR ERREUR iia 3 4 Reference Level gard pepe cde et dei ila cerned coe de e dp vee 3 4 Reference Level put acontece 3 4 Contrast of Log and Eine Mate pto 3 5 Amplitude Unit Men eiie aii 3 5 SD COOH DIV cscs EI 3 6 Reference Level Offset Off neenon pee meer Esa 3 6 Reference Level Offset ON inercia das 3 6 MEI E 3 7 The Largest RBW That can Distinguish the Signals sseeee eee 3 7 The Influence of VB Winnie ta 3 8 MI zorro pL 3 8 NOME c M tion 3 8 DINGO S WEEP 3 9 2AUIO Menus ie tte A TE M es 3 9 Mera Em 3 9 MET iaa uc 3 11 Marker To Ref Lvl and Marker To Center ener ener nnn nennen nnne 3 12 Della Marker TESTEN SRI 3 12 NIB cm 3 12 Multi Marke r Selection 1 iiei eeir dt 3 12 Marker Table ree pcc roces 3 12 Frequency Counter 2 iie ted e e edis E eee Genes ED te RETI Inde b pae bosque e bee inen 3 13 Peak Men ect Ee De t css Tree ete AE EM ROUES ER RR ERES T onesies 3 13 Peak Table cien ebur A e e iei ede its 3 14 Trace Men P ES 3 14 The Example of Vie Wn at ico rito ie ita ena 3 14 Detector Mode scott re acute
93. ad Download the TV plan from the USB disk or the PC to the analyzer The choice plan will display on the screen Upload Upload the TV plan to the USB disk or the PC VE 06 10 03 12 04 59 Ref 43 8 dimu SMPL Log 10 dB Download RS 232 USB Disk CENT 52 500 MHz SPAN 8 000 MHz m RBU 100 KHz UBU 100 KHz SWEEP 20 ms Att 25 dB Return 1 06 10 03 12 05 14 Ref 43 8 dinU SMPL Log 10 dB Download gt PAL_K PLN SOURCE PLN DK PAL_D PLN CENT 52 500 MHz SPAN 8 000 MHz m RBU 100 KHz UBU 100 KHz SWEEP 20 ms Att 25 dB Return Figure 5 9 TV Plan Download Menu 5 4 All the channel settings will be used in the system measurement and will be set as the default mode of the channel measurement items The Enable Disable settings of Channel Enable CCN Enable etc will be used in the system measurement The test result will show on the FCC report 5 4 CATV Test Settings In CATV settings menu which is shown as Figure 5 4 we can see that except Channel Table there are still four items need to be set before start the CATV testing Select Chan Freq Choose the Channel Select mode Inputting the channel by the channel no that define in the active TV plan or the channel frequency directly is determined by the state of this soft key Frequency Setup This is almost the same as channel defini
94. al phase or frequency Quadrature Error The quadrature error of the two carriers feeding the and Q modulators Amplitude Imbalance Separate the QAM distortions resulting from Al of the and Q signal from all other kinds of distortions PES Ratio Denotes the ratio of the QAM signal power to the noise power kirg Suppression Denotes the ratio of the QAM signal to an unwanted coherent CW signal E ocu interferer Denotes the ratio of the QAM signal to the interference signal Frequency Offset The frequency offset relative to the current frequency setting 14 Real Symbol Rate The current real symbol rate calculated by system 15 Symbol Lock The symbol lock flag FEC Lock The Forward Error Correction lock flag Stream Lock The code stream lock flag pep Rate The current symbol rate User or system set 2 10 Chapter 3 Basic Measurement 2 4 Menu Tree This part lists the menu tree that ordered by characters Some menus only can be activated in the instrument with corresponding options AMPLITUDE Amplitude Settings Ref Level dBm Atten Auto Manu dBmV Scal Log Line dBuV Amp Units gt mV Scale Div Ref Offset On Off Amplitude On Off Return Auto Settings Auto All Res BW Auto Manu Video BW Auto Manu Atten Auto Manu Sweep Time Auto Manu CF Step Auto Manu AUX Auxiliary Settings Power Mea Channel Power ingle Demod gt Occupied BW gt Continuous Impedance Adj Chan Power gt Limit Line gt Settings gt top Mea
95. amm 22 More gt Time 0 0 8 CENT 500 000000 MHz Att 10 dB b Second Page Figure 6 11 Parameter Settings In this menu User can set every adjustable parameter such as the center frequency symbol rate attenuator etc Centr Freq Set the center frequency Also user can press FREQUENCY on the front panel which can also input a channel number in a standard channel table Symbol Rate It can be set automatically or set to a special value by changing the Symb Rate to Manu Atten Set the attenuator to Auto or Manu In auto Chapter 7 Tracking Generator and HFC Analyzer mode the attenuator can be adjusted automatically according to the magnitude of the tested signal In some cases user need to adjust the attenuator manually The better way to access the befitting value of the attenuator is to change the screen to the channel power measurement by pressing the Power Mea soft key in figure 6 1 b In that screen adjust attenuator to access the best SNR in conditions of no signal distortion and write down the corresponding attenuator value Turn back to the digital TV measure mode and adjust the attenuator to the signed value then user can get the best constellation output Note In some special conditions For example in CATV measurement when the carrier level difference of different channels is more than 15 dB the auto adjusted attenuator may not fulfill the measurement in such
96. ay 13 Hour 04 Minute 05 Sec and the display format is 06 01 02 13 04 05 see figure 8 11 IEI 06701719 15 50 48 j Ref 98 8 dBpU PEAK Log 10 dB Set Time 142 Input a Time la Sec God Minute Ox Hour 24 Month xx Year 00000 Return CENT 500 MHz SPAN 1 000 GHz EE RBU 3 MHz UBU 1 MHz SWEEP 50 ns fitt 10 dB Figure 8 11 Time Setting 8 2 5 Language Select Press the Language Select soft key you can choose the language between Chinese and English The selection will not lose with the power off of system 8 2 6 Palette Li 06701719 15 51 00 Log 10 dB Ref 98 8 dBpU PEAK Palette 42 Input a Time By Press Digital Key nta Edit Back O e SY a at rye fiuto Set Save Return CENT 500 MHz SPAN 1 000 GHz gt RBU 3 MHz UBU 1 MHz SUEEP 50 ms ntt 10 dB Figure 8 12 Palette Setting Chapter 8 Other Functions and Settings IEI 07704710 09 14 07 10 dB Ref 5 0 dBm PEAK Log Palette 1 Indoor hah CENT 60 500 MHz SPAN 8 000 MHz E RBU 100 KHz UBU 100 KHz SWEEP 20 ms fitt 15 dB
97. cale Div Ref Offset On 73 fi i NP Amplifier CENT 150 00 MHz SPAN 20 00 MHz mnm On 7738 RBW 300 KHz UBW 300 KHz SWEEP 20 ms Att 10 dB AAA a 10dB Grid in Log State IDI 06 11 03 10 04 29 Ref 98 8 dBpU PEAK Log 5 dB dB Did 5 dB Ref Level Amplitude Atten Auto Manu Scal Log Line Amp Units gt Scale Div Ref Offset On Amplifier CENT 150 00 MHz SPAN 20 00 MHz mnm on TT RBU 300 KHz UBU 300 KHz SWEEP 20 ms ftt 10 dB SS b 5dB Grid in Log State Chapter 3 Basic Measurement IDI 06 11 03 10 05 35 2 Ref 34 6 nU PEAK Line X 1 amplitude Ref Level 34 6 hu Ref Level Atten Auto Manu Scal Log Amp Units gt Scale Div Ref Offset On 033 Amplifier CENT 150 00 MHz SPAN 20 00 MHz mn on T3 RBW 300 KHz UBU 300 KHz SWEEP 20 ns Att 5 dB ARA c x1 in Line State IDI 6711703 19 93 56 0 Ref 34 6 mU PEAK Line X Amplitude Ref Level Atten Auto Manu Scal Log Amp Units gt Scale Div Ref Offset On 033 Amplifier C
98. channel The input channel number doesn t exist in the Input another existed channel or edit active TV plan the TV plan to add the needed channel 77 Channel already Exist The input channel number has existed when Input another channel number user edit the channel number 78 Delete channel anyway Delete an selected channel Press ENTER to confirm the Delete or press ESC to cancel the command 9 7
99. continuous Cont and the other is single Sigl The default mode is continuous mode lf user wants to set the sweep mode to single mode user can set the Sweep soft key in Figure 3 18 to Sigl state or press the SGL key to activate a single sweep at the same time the menu shown as Figure 3 19 will appear Press SGL key again can activate another single sweep If want to change the state to Cont user can select the Sweep soft key and set the state of it to Cont IDI 06 01 16 15 45 36 Ref 68 5 dBpU PEAK Log 10 dB Sig Sup Sweep Cont ERE CENT 150 00 MHz SPAN 10 00 MHz E RBW 100 KHz UBU 100 KHz SWEEP 50 ns fitt 5 dB Figure 3 19 Single Sweep 3 Hold Pressing the HOLD key the wave display on the screen will be frozen Press the key again to activate the wave again Note In Hold state no sweep mode can be activated no matter Cont or Sigl 3 2 3 Auto Press the AUTO key in the submenu of it which is shown as Figure 3 20 user can select the Auto Manu state of Res BW Video BW Atten Sweep Time or CF Step By pressing Auto All soft key user can set all these parameters state to Auto IDI 06 01 16 15 45 51 Ref 68 5 dBpU PEAK Log 10 dB Auto 1 Auto All Res BU Auto Manu Video BU
100. dB Return Figure 5 5 TV Plans menu Activate Activate the selected TV plan Run the knob or press the Up Down key then the arrow display on the left of the TV plan will move with it Press Activate key then the corresponding TV plan will be activated and the state of it that display on the screen will change to In Use Edit Press this key to edit the selected TV plan The basic information of the selected plan will display on the information window such as the plan title total channel number analog digital and enabled channel number In the submenu of it user can choose to create a new channel edit or delete the current channel Chapter 5 CATV Analyzer Ref 5 0 dBm smel fog To E Editor 1 Bef 5 0 dBm smel og ioie E Editor 1 Ch Mum Caption Type Std Frequency Enable DG DP Field Odd n 2 2 fmalog NTSC M 55 250 MHz Enable News gt gt DG DP Line 18 pas ica 3 3 fmalog NISC M 61 250 MHz Disable DG DP Signal FCC CTS 4 4 fmalog NTSC M 67 250 MHz Disable In Channel Response Gate OFF 5 5 Analog NISC H 77 250 MHz Disable Edit gt In Chamel Resp Field Mext Chan 6 6 fmalog NISC M 83 250 MHz Disable In C
101. e broadband engineer and technician the key parameters are the bandwidth the dimension of the lower vestigial and upper sidebands and the frequency and amplitude relationships of the vision luminance color chrominance and audio sub carriers In terms of these parameters the vast majority of TV transmissions fall into just six categories which are illustrated in figure 5 3 Figure 5 3 CATV Standard Note that Figure 5 3 does not define such parameters as field frequency line frequency or color encoding technique which distinguish the NTSC PAL and SECAM systems The letters B G M etc are referred to as TV standards and the encoding techniques NTSC PAL etc are referred to as systems Standard Can be used with these Systems B PAL SECAM D SECAM G PAL SECAM H PAL SECAM l PAL K SECAM K1 SECAM L SECAM NTSC PAL N PAL Table 5 1 CATV Standard and System When measuring or specifying CCN it is important to define the bandwidth in which the noise is specified The bandwidths for various TV systems are as shown in the following table System I BG K1 L D K M N Video bandwidth 6 75 5 75 7 25 6 75 4 95 including lower sideband Noise bandwidth 5 08 4 75 5 58 5 75 4 00 Table 5 2 Video and Noise Bandwidth for Various TV Systems 5 2 5 2 Base Noise Calibration Press Cal Base Noise in
102. e connect a PC with the analyzer or it may be damaged 9 Power switch Directly power on or off the analyzer Caution This key control the power supply directly The internal memory of the analyzer may be damaged if it is pressed when the system is operating the memory So it is recommended to press the soft power key on the front panel to power on or off the analyzer unless the soft power key can t work in some special conditions 10 Fan To protect instrument if the temperature is too high fan will automatically start 11 Charge port Charger input port Warning Make sure to use the charger provided for this instrument Otherwise the operator and the instrument may be damaged 2 5 Chapter 3 Basic Measurement 2 3 Screen Information 2 3 1 Spectrum Analyzer Screen 1 Single Window The Spectrum that display in single window mode is shown as figure 2 4 11 Frequency Centr Freq Start Freq Stop Freq Freq Step Manu 1 425823 4 5 6 7 Did IDI ABC 06 06 02 13 58 11 MKR 150 00 MHz Ref 98 8 dBpU PEAK Log 10 dB 87 66 dBpU 12 DL Center Frequency 7 150 00 MHz UNCAL 13 14 15 16 Ww i if WAT MIN li ul Qiu MU F RO i WU ink mi 17 eS Ma ENT 150 00 MHz PAN 50 00 MHz TG T 30 KHz UBW 30 KHz SWEEP 50 ms att 10 aB p 19 20 21 22 23 24 25 2627 Figure 2 4 Single Window Mode The information we
103. e state is mV V uV or nV The wave will not change with the change of unit too Chapter 3 Basic Measurement 06 11 03 10 02 23 10 dB IDI Ref 98 8 dBpU PEAK Log Amplitude Ref Level Current state is Log state Atten OUJ Manu Log Line Amp Units gt Scale Div Ref Offset On iia LA i CENT 150 00 MHz SPAN 20 00 MHz am On RBU 300 KHz UBW 300 KHz SWEEP 20 ms ftt 10 dB a Log State Ref is 98 8 dBuV IDI 06 11 03 10 02 47 Ref 86 6 mU PEAK Line X 1 Amplitude Ref Level Current state is ling state atten Manu Log PEE Amp Units gt Scale Div Ref Offset o 338 Amplifier CENT 150 00 MHz SPAN 20 00 MHz mm on Dw RBU 300 kHz UBW 300 KHz SWEEP 20 ms Att 10 dB gt b Line State Ref is 86 6 mV Figure 3 9 Contrast of Log and Line State Figure 3 9 shows the difference measure results of the same signal one in Log state and the other in Line state 4 Unit Press the Amp Units soft key the submenu of it will appear IDI 06701716 15 39 13 Ref 78 8 dBpU PEAK Log 10 dB Amp Units dBn l dBnU mu CENT 150 00 MHz SPAN 20 00 MHz gt RB
104. e system will give the prompt UNCAL See also 3 2 1 Band Width 2 Press Up Down key cannot change the span to OHZ 3 When press Up Down key to change span if the current span isn t one of the change sequence it will be treated as the nearest lower one in the sequence For example 199Hz will be treated as OHz if press Up key now the span will become to 200Hz IDI 06 01 16 15 36 23 Log 10 dB Ref 78 8 dBpU PEAK Span 1 Span Frequenty 50 00 MHz Span Zoom Full Span Zero Span Last Span A Ae map CENT 150 00 MHz SPAN 50 00 MHz a RBU 300 KHz UBU 300 KHz SWEEP 50 ns fitt 10 dB Figure 3 4 Narrow BW IDI 6701716 15 36 06 Log 10 dB Oi Ref 78 8 dBpU PEAK Span 1 pan Frequenty 1 000 GHz Span Span Zoom Zero Span Last Span CENT 500 MHz RBU 3 MHz UBU 1 MHz Figure 3 5 Wide BW SPAN 1 000 GHz SWEEP 50 ms fitt 10 dB 2 Span Zoom Press this soft key the system will search the peak signal from all signals and set the frequency of this signal to the center frequency and then choose an appropriate span for the display of this signal 3 Full Span Change the span to 1000MHz 4 Zero Span Change the span to OHz
105. e the current By Press Digital Key button time just press the digital key to continue 43 Calibrate Finish After the frequency amplitude or base noise calibrate is success finished 44 Please Turn Off Double Window Try to turn on the volume mark table peak Press WINDOW and then select table in double window mode Window Off 45 Please Input 0 9 While saving the file the file name should be Input number 0 9 positive integer 46 Please shut down And restart After update you should shut down the power Shut down the power and restart DS8821 again 47 Please augment RBW Set the count On while RBW is smaller than Change RBW to larger than 1kHz 3kHz 48 Test unfinished View last statistic result while last statistic is View after finish at least one statistic never finished 49 Please Exit Aux Measure Change the parameters while system is in Exit the channel power measure channel power measure state state 50 Turn Off FM Change the parameters while system is in FM Turn the demodulation to AM demodulation state 51 Turn Off TV Trig Change the parameters while system is in TV H Change the trigger to free run mode trigger state 52 Option not Installed Use the functions that need options support Connect to us and purchase the options 53 Please turn off Gate While measure CSO CTB in Gate On state Set the gate to Off press Next Last Chan soft key 54 Already Exist The file has
106. e the o i m z A Ae rid lex lan current state of different items Channel Enable Enable Tilt Enable Enable FH Deviation Enable Enable 1 Directly Input by the number key and confirm the Depth Modulation Enable Enable input by press ENTER key Channel No ecu PE E EE Carrier Center Frequency Symbol Rate CTB CSO punt Enable ae Enable nes Cross Modulation Enable Enable frequency Offset Equivalent Noise BW and the line CTB CS0 Enable Enable 6 gt CLDI Enable Enabl number such as Depth Modulation Line CDLI Line etc deb a Enable are inputted by this way In Chamel Response Enable Enable Hu CENT 57 000 MHz e SPAN 6 000 MHz e EEEE 2 Press Up Down key to change between the RBU 100 KHz UBU 100 KHz SWEEP 20 ms Att 25 dB permitted values Analog Digital Standard Last Chan Next Chan 3 Anal 61 250 HH Reti Suppress Modulate Type gate on off field odd even E ug ae 5 ie and the enable disable state of the testing item are set by this method c Page Three m 3 IHI GGF 3 Change with the other items but can t change Ref 5 0 aBn SHEL Log Ti L Editor 1 independently such as Audio 1 Offset Audio 2 Offset Ree os AAN 1 H mable and Channel Bandwidth that changed with analog TV Channel Power Enable standard MER Enable E Mext Chan 4 The input way of Channel Caption is different to the others all Make the arrow po
107. ear which is shown as below IDI 06701718 16 56 50 Log 10 dB Ref 98 8 dBpU AUG Occupy BW Single Continuous Y CENT 339 00 MHz RBU 300 KHz UBU 1 MHz OCCUPIED BU 99 9 7 OBW 12 00 MHz Fe 0 Hz Pur 79 31 dBpU SPAN 12 00 MHz LS SWEEP 50 ms Att 30 dB CSP 4 00 MHz Stop Meas Figure 4 5 Occupied Bandwidth Menu In order to measure accurately the scan span is fixed on three times of the channel Spacing The analyzer scans the setting span and calculates the total power firstly Secondly find the greatest signal point and set the difference of this signal frequency and the center frequency as Fc and display it on the screen Finally little by little expand the power integral span around the greatest signal until the equation the integral power total power Occupied BW Power The integral span is the OBW that display on the screen As same as the Channel Power measurement user can use single scan and continuous scan function by selecting the soft key Single and Continuous 4 1 4 Adjacent Channel Power The bandwidth of adjacent channel is the same as the bandwidth of the current tested channel In Channel Measurement Menu when user presses soft key Adjacent Channel Power the Adjacent Channel Power Menu will appear that looks like below IDI 06 01 18 16 57 10 Ref 98 8 dB
108. ease Turn Off When delta mark fixed mark or multi marks is Turn off the reluctant marks redundant Marker s on trying to turn the mark noise on 32 Turn One Trace Turn on NdB or Instants function when there is Press trace and turn at least on trace on Write Mode no trace in write mode in write 33 Data ll be lost Want to restore to the manufacture If you press yes all bmp files user Continue anyway channels etc will be lost 34 Doesn t Support Want to update by the USB but this version USB in this version doesn t support it 35 No Such a File Transmit or delete a file not exist Save a picture 9 5 Chapter 9 Appendix NO MESSAGE BECAUSE RESOLUTION 36 Translate Failed When transmit BMP files can t connect to the Confirm the connection and the Confirm Port host baud rate 37 Not Connected Doesn t connect to a printer the printer is not Confirm the connection open doesn t support this printer Confirm the model 38 No Paper No paper Add some paper 39 Printer is Busy Printer is Busy Wait for a while 40 Select a Printer Haven t choose a printer Press config gt Print Save gt Print 41 Input a Name When save a BMP file input a filename number Input a number maximum 8 digitals Enter To Continue 42 Input a Time When time display is on and you choose time If you want to chang
109. easurements Modulation Measurements Input Impedance e Limit Lines When user press key AUX on the panel the Auxiliary Measurements Menu will appear on the right side of the screen please look at the Figure 4 1 below ER Sl a Lic 06701718 16 53 16 Ref 98 8 dBpU AUG Log 10 dB Aux Ctrl Power Mea gt i Demode gt i Impedance Limit Line gt CENT 500 MHz SPAN 1 000 GHz EE RBU 3 MHz VBW 1 MHz SWEEP 50 ms Att 30 dB Figure 4 1 Auxiliary Measurements Menu 4 1 Chapter 4 Auxiliary Measurements 4 1 Channel Measurements 4 1 1 Unit Exchange The contents we introduced before focus on the level measurement of the signal Of course we can measure the channel power with spectrum analyzer The units usually used in spectrum analyzer are dBm dBmV and dBuV which denote the level value Please see the relationship of these units in table 3 1 In fact we use the units dBm to denote the power value In the following we will talk about the relationship between dBm and dBmV dBm is defined by A 10xlog P PO where PO is the reference power and PO 1mW P is the power under test dBmV is defined by A 20xlog V VO where VO is the reference voltage and VO 1mV V is the voltage under test
110. ect a channel pointer from 1 to 8 and input the channel number frequency After inputting the value press Fav Enter to confirm Note Favorite channel can be settled by inputting the frequency But the frequency must be included in the standard table Otherwise it will be automatically changed to the nearest frequency that is included in the standard table 5 13 Chapter 5 CATV Analyzer IDI 06 01 17 13 42 46 Ref 86 2 dBpU SMPL Log 10 dB Favourite Favorite Channel Measure Fav Set 1 Fau Enter CENT 601 75 MHz SPAN 8 000 MHz E RBW 300 KHz UBU 1 MHz SWEEP 50 ms fitt 20 dB Chamel 1 49 75 MHz Channel 1 49 75 MHz Channel 1 49 75 MHz Channel 1 49 75 MHz Channel 1 49 75 MHz Channel 1 49 75 MHz Return Channel 1 49 75 MHz Channel 1 49 75 MHz Figure 5 46 Create Favorite Channel Press Measure to measure the favorite channel IDI 06 01 17 13 43 50 Ref 86 1 dBpU PEAK Log 10 dB Favourite Channel Visual U A 41 none dBpU none dB 1 none dBpU none dB Fav none dBpU none dB Set 2 1 none dBpU none dB Cac eed 1 none dBpU none dB Fav 1 none dBpU none dB Enter 1 none dBpU none dB 1 none dBpU none dB CENT 56 25 MHz SPAN 8 000 MHz TE RBU 300 KHz UBU 1 MHz SWEEP 50 ms ftt 20 dB UIS MAX mone dBpU UZA MAX none dB VIS MIN none dBpU UzA MIN none dB Return Figure 5 47 Favorite Channel Scan
111. enne enne rennen annann nnns 5 5 Hornet 5 6 FM DO eter tei ONE E EM ERR OPER E REN TER M rude 5 6 Depth Modulation REPRE 5 6 Carrier Level amp Frequency cni fesse Sek el idi iia eran dec deep ee th eee bee sd abe de 5 6 CON Measures Step iio 5 7 CON Measure Ste p2 coria aid 5 7 CIN Gate Measure curia a decae 5 7 CON Gate Settings cial 5 7 Testing Line View oia 5 8 NN 5 8 H UM EET ReSUll ot A daa Nec ede Ree 5 8 Cross Modulation 1 renidet A Teen dd cda 5 8 CTB CSO Testing Menu trente pe Lee et eed pene Inr ka ed Le anuo e ex d eua UR AT de oe a mede eR nd Hut ue 5 9 CTB CSO Gate MeasUre 2 eiii ato pfe Eat seo Dex EH EDU n ee ix ege done Dude ca qe iia 5 9 Laa A PRSE RR brin taa 5 9 RPM IEEE 5 10 CEDI Testing Signal ERR 5 10 Differential PRAsSe GaIN 0 dada 5 10 Matrix Signal CCIR LINE 330 itii eite aiii 5 11 In Channel Response Sweep Signal sese nn rra n nn anno nn nr naar nennen 5 11 Sia Selec dao 5 11 In Channel Response Insert Test SigNAl oooonnonnnnccnnnnoccccnonancnononcncnnnonnncnnno cnn rnnnn eene ennemi 5 11 Vertical Interval Test Signal torte eene nett edes it erred iae Pe nth Yoann pe cales 5 12 Channel Scan Root MNU nissin rene recte mere te ride 5 12 Histogram Information PT 5 12 Standard Channel Stanan inenen Ae a 5 13 Reference LIne m P
112. equency Input Port RF Input Input port of the RF signal The frequency range of the signal is from 1MHz to 1GHz The type of connector is standard BNC type and the driving point impedance of it is 750 500 If the input signal is overload the attenuator and the input mixer of the instrument may be damaged So you should be cautious when testing high power RF sources and transmission systems The Maximum input power is 20dBm Moreover if the voltage of the DC with the signal is too high the input attenuator may be damaged too So make sure that input DC voltage is lower than 100V Soft key Activate the corresponding function display on the screen RESET Reset the instrument Tracking Generator Output Port Tracking generator output the tracking signal from 1MHz 1000MHz with the amplitude range from 0 60dbm The type of connector is standard BNC type and the output impedance is 750 500 Chapter 2 Getting Started 2 1 2 The Front Panel Keys D FUNC ENTRY FREQUENCE 1 2 3 SPAN 4 5 6 AMPLITUDE ESC 7 8 9 WINDOW y IS ENTER 0 l CONTRL SYSTEM MARKER i sweer BW TRIG HOLD CPFIG mone ERIN NORMAL PEAK fauto Traci SGL SAVE AUX MEAS CALL RESET O Figure 2 2 Front Panel Key 1 FUNC e FREQENCY Set the Center Frequency Start Frequency Stop Frequency and Frequency Step in the corresponding menu of this key Frequency setting key
113. er frequency and set the span to zero to produce the time domain waveform of the carrier signal A FFT is performed on the time domain data and the magnitude of the 15 7 kHz offset signal will be measured relatively to the carrier level IDI 06 10 03 12 13 14 MKR 15 600 KHz Ref 38 8 dBnU SMPL Log 10 dB 19 56 dB Cross Return t fidd fitt TIL MUN CENT 12 5 KHz SPAN 25KHz E RBW 100 KHz UBU 100 KHz SWEEP 10 ms fitt 10 dB Channel DS 7 Sub Att EV C XMOD 19 56 dB 15 60 KHz Figure 5 26 Cross Modulation 5 5 9 CTB CSO The instrument can provide the CSO CTB measurement result in the same test view There are two methods of measuring CSO CTB describing as below 1 Turn off the Carrier The CTB points are always on the visual frequency So if user wants to measure CTB the system will suggest user to turn off the carrier firstly The measure procedure is similar with the CCN measurement Press the Measure soft key Then after auto system initialization press Continue soft key to go on the test Chapter 5 CATV Analyzer 2 Gate Mea
114. h white reference Carrier to Composite Noise Ratio Optimum range 92dBuV 97dByV with O dB Attenuation and preamplifier OFF 72dByV 77dByV with O dB Attenuation and preamplifier ON Maximum CCN 60dB with 1dB accuracy 65dB with 3dB accuracy Resolution 0 1dB CSO CTB Optimum range 82dBuV 87 dBuV with OdB Attenuation and preamplifier OFF 62dBuV 67 dBuV with OdB Attenuation and preamplifier ON Maximum CTB CSO 63dB with 1 5dB accuracy and 78 channels 70dB with 4dB accuracy and 78 channels Resolution 0 01dB Cross modulation Range 60dB Resolution 0 1dB Accuracy 2 0dB X mod lt 55dB C N 40dB In channel Frequency Response 4 5dB X mod lt 60dB C N 40dB Range 10 dB Resolution 0 1 dB Accuracy 0 25 dB Differential Phase Option 3 Accuracy 3 maximum Differential Gain Option 3 Accuracy 2 maximum Luminance to Chrominance Delay Option 3 Accuracy 40 nsec maximum Digital Measurement Specifications Option 4 Modulation Modulation type 16 32 64 128 256QAM QPSK ITU T J 83 Annex A B amp C Interleave capability Up to 128x4 In Annex B 12 x 17 In Annex A C Constellation display QPSK 16 32 64128 256QAM Full constellation with zoom capability Digital Carrier Average Power Measurement Amplitude range 30dByV 120dBuV Resolution
115. hamel Resp Line m 95 95 fmalog NTSC M 91 250 MHz Disable In Channel Resp RBU 300 KHz 96 96 fmalog NTSC M 97 250 MHz Disable In Chamel Resp Mark 1 0 500 MHz 3 3 fmalog NISC M 103 250 MHz Disable Delete In Channel Resp Mark 2 3 750 MHz 98 98 fmalog NTSC M 109 250 MHz Disable In Channel Resp Signal GCR 99 99 fmalog NTSC M 115 250 MHz Disable CTB CSO Gate OFF 14 14 fmalog NTSC M 121 250 MHz Disable Sort by CTB CSO Field 15 15 Analog NTSC M 127 250 MHz Disable Frequency CTB CSO Line gt 16 16 fmalog NTSC M 133 250 MHz Disable TELLE C30 Frequency Offset 1 1 250 MHz 17 17 fmalog NTSC M 139 250 MHz Disable CSO Frequency Offset 2 0 750 MHz 18 18 Analog NTSC M 145 250 MHz Disable C30 Frequency Offset 3 0 750 MHz 19 19 fmalog NISC M 157 250 MHz Disable i CS0 Frequency Offset 4 1 250 MHz Hu CENT 57 000 MHz SPAN 6 000 MHz EEEE CENT 57 000 MHz SPAN 6 000 MHz EEEE RBU 100 KHz UBU 100 KHz SWEEP 20 ms Att 25 dB Save RBU 100 KHz UBU 100 KHz SUEEP 20 ms Att 25 dB Title NTSC Total Num 157 Analog 82 Digital 75 Last Chan Enabled 1 Return Next Chan 3 Analog 61 250 MHz Return Figure 5 6 TV Plan Edit Menu b Page Two There are 55 items user can edit with a selected channel Rett 5 0 dBm si ea A D Editor 1 To change the default value of these items run the arrow gt CIB Frequency Offset 8 000 MHz Minds to point to the item firstly And then change it by the follow A e un steps There are totally four methods to chang
116. hange the state of marker 4 the operation steps are as follows Select Mkr al 2 El 4l 5 el 7 el Marker 2 Marker 3 1 Current State 2 Press Selcet Mkr 3 Press Selcet Mkr again Marker 3 become active y al Al Tas A 5 6 7 8l Marker 4 _on TNI 4 Press Selcet Mkr 5 Press Marker 4 6 Press Marker 4 again Marker 4 again to set it On become active Figure 3 26 Multi Markers Selection After selecting the marker and set the state of it to On user can change the marker s position by the same way of changing Normal Mkr Mark Table displays values of all active markers See Figure 3 25 D 96 01 16 15 51 16 MKR 600 4 MHz Ref 76 5 dBpU PEAK Log 10 dB 42 72 dBpU Normal 21 Count On 033 Ei Select Mkr AI A al 4l 5 6 2 8 gt il Marker 2 MN or T M ni 7 ER Mark Table v WW ore Mark Noise On CENT 518 0 MHz SPAN 200 0 MHz M Noise Hz RBU 1 MHz UBU 1 MHz SWEEP 50 ms Att 10 dB On 1 450 0 MHz 58 37 dBpU 5 2 600 4 MHz 42 72 dBpU 6 3 2 2 more gt 4 8 Figure 3 27 Marker Table Chapter 3 Basic Measurement Note When switch between Mkr Normal Delta Mark Fixed Mark and multi markers the pre marker will automatically set to Off 5 All Off Press All Off soft key in Figure 3 22 al
117. hat after demodulation Once user presses soft key FM Gain user can change the value by using the up cursor the down cursor or the knob it provides 100K 50K 25K 12 5K 4 3 Input Impedance Once user presses soft key Input Impedance it will display the input impedance of this instrument 75ohm or 50 ohm The following figure display the Input Impedance Menu IDI 06 01 18 17 01 08 Ref 68 8 dBpU PEAK Log 10 dB Aux Ctrl Input Impedahce 75 Ohm Power Mea gt roe I Linit Line gt EXE Auli SPAN 100 0 KHz SWEEP 400 ns fitt 10 dB ee CENT 150 0000 MHz RBW 3 KHz UBU 3 KHz Figure 4 8 Input Impedance Menu 4 3 Chapter 4 Auxiliary Measurements 4 4 Limit Line In Auxiliary Measurement Menu if user presses soft key Limit Line the Limit Line Menu will appear IDI 06706702 16 42 48 AP Ref 103 8 dBpU PEAK Log 10 dB D Limit 1 Limit Test on 338 Limit Line WKN o Beep Lon or Settings gt Stop Meas CENT 150 0 MHz SPAN 150 0 MHz gt 5 RBU 1 MHz UBU 1 MHz SWEEP 50 ns ftt 15 dB F Figure 4 9 Limit Line Menu User can use Limit Line function to monitor the signals User can select beep on or off to make the analyzer give alarm or not User sh
118. he Channel Bandwidth in Settings menu After user press the Settings soft key the Settings Menu will appear which is shown as figure 4 3 4 2 Chan Meas ISI 06 01 18 16 55 29 Ref 98 8 dBpU AUG Log 10 dB Channel Spacing Chamel Band Width Occupied aaa a ag GEN Wi MT i SPAN 16 00 MHz SWEEP 50 ms Att 30 dB CENT 339 00 MHz RBU 300 KHz UBU 1 MHz Return Figure 4 3 Channel Settings Menu In this menu user can modify the Channel Spacing Channel Bandwidth and Occupied BW Power In Channel Measurements function user can modify the Channel Bandwidth manually Otherwise it will take the default value 8MHz In order to measure accurately the scan span is fixed on two times of the Channel Bandwidth After finishing these settings it will return to the Channel Measurements menu and the Channel Power Menu will appear as figure 4 4 if you press the soft key Channel Power Before measure the Channel Power of the selected channel analyzer will automatically test the total power of all the signals and set the state of attenuator and preamplifier And during the testing process the analyzer will real timely monitor the tested value of channel power If the value change is more 5dB the analyzer will check the total power again IDI 06701718 16 56 16 Ref 98
119. input mixer and21MHz separation Preamplifier OFF Residual responses input terminated and O dB attenuator lt 5dBuV 1MHz 1000MHz Display range Log scale 0 1 to 1dB Division in 0 1dB step 1 to 40dB Division in 1dB step Linear scale 8 divisions Scale units dBm dBmV dByV mV Marker readout resolution 0 03 dB for log scale 0 03 of ref level for linear scale Traces 3 traces 9 1 Chapter 9 Appendix Trace detector Marker functions Sample Posi peak Neg peak Normal Average peak next peak marker to center marker to ref etc Marker display normal delta Fix marker and frequency counter Reference level 38dBuV 143dBpV Level accuracy typs 1dBQ 20C Resolution bandwidth switching uncertainty lt 0 1dB Input attenuator switching uncertainty typ lt 0 3dB Inputs outputs Front panel Calibrator output Frequency 150 MHz 2 x10 Amplitude 88 7dBuV 0 5 dB 20 C RF INPUT Input BNC or F connector Input impedance 750 500 SWR typ 1 5 10MHz 1000MHz ATT210dB USB PORT USB1 1 Rear panel VGA OUTPUT KBD INPUT LPT RS232 TG OUT Option 5 Output BNC connector Frequency range 1MHz 1000MHz Phase noise lt 80dBc Hz 10KHz Level range OdBm 60dBm Level accuracy 1dB Level flatness 1dB Ha
120. int to this item press ENTER key then there will be a green short line display under one character of the current channel caption Press Up Down key the corresponding character will change with it Run the knob to move the short line to another character and change it After input all the character press ENTER key m CENT 57 000 MHz SPAN 6 000 MHz INE again to confirm the input RBU 100 KHz UBU 100 KHz SWEEP 20 ms att 25 dB IEI 07704709 13 54 43 A Last Chan Ref 5 0 dBm SHPL Log 10 db Escditor al Next Chan 3 Analog 61 250 MHz Return gt Channel NO zZ Channel Caption z Las tachan fAnalog Digital final Standard NTSC d Page Four SuppressModulate Type Normal Next Chan Carrier Center Frequency 55 250 MHz 1 fiudio 1 Offset E 4 500 MHz Figure 5 7 Channel Items udio 2 Offset 4 500 MHz S Conie Pondwidth 6 000 MHz New Create a new channel After the settings of all the mbo ate Sar p amp 4 iti Depth Modulation Gate OFF items press OK to confirm the new plan definition or Deven RSAC eat ELT E press return to quit the former input If the input channel Pouer Frequency 60 Hz No is the same with the already exist channel the system CLDI Field Ddd m CIDI Line 18 will give the clew and keep the former channel No CLDI Signal FCC CTS Hu unchanged REU 100 Re UBM 190 MHz SWEEF 30 me Att 25 4B Z Edit Edit an existing channel Press Last Chan Next Last Chan Chan to enter
121. isual and aural carrier corresponding to the white line will display on the screen Setting Ref Line status to On the minimum visual carrier amplitude the difference of maximum and minimum amplitude of visual carrier the maximum and the minimum visual to aural ratio will display on the information window visual carrier aural carrier level Figure 5 39 Histogram Information Chapter 5 CATV Analyzer DI 06 10 03 12 EH vi ps 38 8 dBmU PEAK Log 10 Standard Ref Line On Count gt ie 306 Er dd UBU 100 KHz SUPER 1 ns Att 10 dB Channel DS 1 Visual Cent Freq 49 75 MHz Carrier Pouer 9 65 dBnU Return Visual To Audio 8 91 dB 2 E Figure 5 40 Standard Channel Scan DI 06 10 03 12 ga oz ier 38 8 dBmU PEAK Log 10 di Measure ETE or Count on ET Standard gt ie 300 Tie Z vy 100 KHz SUE 1 ns Att 10 dB Channel DS 1 Vis Min 9 89 dBnU Visual Cent Freq 49 75 MHz MaxMin 47 64 dB Carrier Pouer 7 03 dBnU U h Max 22 71 dB Return Visual To Audio 5 76 dB UZA Min 6 76 dB Figure 5 41 Reference Line 5 6 2 User Channel Select User Channel in the Channel Scan Root Menu Figure 5 37 In the user channel scan mode user select to scan the Analog or Digital channels separately The Count can be enabled in analog channel scan IDI 00 10
122. ity Menu Default Press this soft key all the manual settings in DVB mode will be changed to the default values As the default conditions in standard J83 ANNEX A the symbol rate of QPSK 16QAM 32QAM 64QAM and 128QAM is 6 875MS S and it is 6 952MS S while 256QAM in standard J83 ANNEX B the symbol rate of QPSK 16QAM 32QAM 64QAM and 128QAM is 5 057MS S and it is 5 361MS S while 256QAM in standard J83 ANNEX C the 6 5 Chapter 7 Tracking Generator and HFC Analyzer symbol rate of QPSK 16QAM 32QAM 64QAM and 128QAM is 5 274MS S and it is 5 361MS S while 256QAM 6 6 Chapter 7 Tracking Generator and HFC Analyzer 7 Tracking Generator and HFC Analyzer Main points of this Chapter O Tracking Generator Option 5 7 1 Chapter 7 Tracking Generator and HFC Analyzer 7 1 Tracking generator Press Tracking soft key in the mode menu and then the submenu which is shown as figure 7 1 will appear on the screen IDI 06 06 07 16 05 38 Ref 98 8 dBpU PEAK Log 10 dB t TG 1 TG on 9338 TG Level Power Cal Normalize Mark 0 Rel Return CENT 500 MHz SPAN 1 000 GHz i RBU 3 MHz UBU 1 MHz SWEEP 50 ms fitt 10 dB Figure 7 1 Tracking Generator menu To use the tracking generator firstly we should connect the generator and the analyzer well The connection diagram is shown as the figure 7 2
123. k kf W i PA y fi AP Sub Att ba Io T TT ACA y At Y Y Cucle Meas CENT 166 750000 MHz SPAN 6 Hz RBU 100 KHz UBU 100 KHz SWEEP 30 ms fitt 10 dB Channel Z7 Cycles Meas 25 PEAK FM DEY 35 KHz MAX FM DEU 37 KHz 0 100 KHz Figure 5 16 FM Deviation The FM Deviation function enable user to measure the FM deviation of the select channel The information window shows the current deviation value and the maximum deviation The default cycle of calculating the maximum data is 25 times By pressing Cycles Meas user can manually set the cycle While measuring the FM deviation user can also listen to the sound by turning the knob or pressing UP DOWN key to change the volume In channel measurement mode Sub Att and Add Att if often used to change to current attenuation if user wants to 5 5 4 Depth Modulation The depth of modulation test measures the percentage of amplitude modulation AM on the video carrier 5 6 a Normal Testing IDI 06 06 05 09 53 08 MKR 43 4 us Ref 832 0 nU SMPL Line X 1 243 30 nU Depth Mod Tine Field i i T rnm E Even A APA ua TV v NI CENT 176 250000 MHz SPAN Hz m RBU 1 MHz UBU 1 MHz SUEEP 80 us ftt 30 dB
124. l is not good enough Turn off the modulation can get a more accurate value Set the Measure state to FFT mode then the analyzer will perform a single sweep of 250 ms and performs a Fast Fourier Transform FFT on it to separate power line related components 50 Hz 100 Hz 150 Hz and 200 Hz are displayed in PAL standard while in NTSC standard the marker point is displayed This is intended to be used as a troubleshooting aid A relatively high 50Hz in PAL 60 Hz in NTSC level implies inadequate grounding or stray power utility neutral currents A relatively high 100 Hz in PAL 120 Hz in NTSC level implies poor filtering of a full wave rectifier in a power supply 5 8 IDI 06 10 03 12 12 54 MERA 100 Hz Ref 38 8 dBnU PEAK Log 10 dB 41 95 dB Hum Return Add Att Sub Att Measure Tine 3333 ALL LUZ UNA PUPA P Maa CENT 500 Hz SPAN 1 KHz tt RBU 300 KHz UBU 100 KHz SWEEP 250 ns fitt 10 dB Channel DS 7 HUM 6 2 7 50 Hz 3 6990 7 150 Hz 0 8289 7 100 Hz 1 3444 7 200 Hz 0 4093 7 Figure 5 25 HUM FFT Result 5 5 8 Cross Modulation The cross modulation test measures the first 15 7 kHz cross modulation sideband relative to the visual carrier of the channel Modulation must be turned off in order to perform this test The analyzer is tuned to the carri
125. l markers will be set to Off 6 Count Frequency count can give the accurate frequency of the strongest signal around the marker which is working as a cymometer The bandwidth of the counter is 100kHz and the accuracy of it is Hz Note If the Count soft key is set to On the displayed frequency will change from the frequency of marker to the frequency of the strongest signal around the marker IDI 06 01 16 16 13 05 MKR 150 048 MHz dB Ref 78 8 dBpU PEAK Log 10 35 52 dBpU Normal 21 Mark Table Mark Noise on A Noise Hz M ll 2 2 more gt SPAN 1 000 MHz gt SWEEP 50 ms fitt 10 dB CENT 150 000 MHz xRBU 30 KHz UBU 30 KHz a Count Off IDI 06 01 16 16 13 15 MKR 150 000007 MHz Ref 78 8 dBpU PEAK Log 10 dB 35 23 dBpU Normal 21 EON or Select Mkr Fi 2 3 4 5 6 7 8l Marker 1 On i Mark On a E Ed 7 Mark On z 3 Y o Noise Hz A On 2 2 more gt CENT 150 000 MHz SPAN 1 000 MHz xRBU 30 KHz SWEEP 50 ms fitt 10 dB VBU 30 KHz b Count On Figure 3 28 Frequency Counter 7 Mark Noise Set Mark Noise to On state
126. late WIN or PJ 0 3 E gt E gt w QE 0 0 81 8 2 tt Baa EIA Peer ees de eee ae coe m SNR 42 2 dB cs 43 0 dB 4 gt x B Zoom Out CI gt 34 dB Freq Offset gt M Display 1 06 KHz mas Real Symb s amp 4 3 6 875 MS S SYMB FEC STREAM A gt Return Time 0 0 2 CENT 500 000000 MHz Att 10 dB Figure 6 2 Constellation Menu Refresh Clear the screen and reset the point counter Grid Control the On Off state of the grid that display on the constellation diagram Template Control the On Off state of the template that displays on the constellation diagram Zoom In and Zoom Out Zoom in out the signed area in the blue frame that can be selected by turning the knob or pressing the array keys IDI 06 06 29 15 25 34 64 Qam Symb 6 875 MS S an Const BER Pre FEC lt 1 0E 9 Refresh BER Post FEC Se lt 1 0E 9 Grid MER 38 5 dB EEE ore ENM 14 7 dB EUM 0 8 x amp Template E ovr PJ 0 2 QE 0 0 AI 0 1 PA SNR 42 1 dB CS 42 2 dB Zoom Out CI gt 34 dB Freq Offset Display 1 09 KHz ae amp ES e Mode Real Symb 6 875 MS S SYMB A FEC A STREAM A m Return Time 0 0 14 CENT 500 000000 MHz Att 10 dB Figure 6 3 Constellation of 64QAM afte
127. ll an error message 37 Not connected will display on the screen When Sav state is selected after pressing PRINT SAVE key system will give the prompt 41 Input a Name Enter to continue After input the file name press ENTER key on the front panel then the picture that is being displayed on the screen will be saved Print Save soft key is used to do the extend operations of PRINT SAVE key Pressing this soft key the submenu which is shown as figure 8 3 will appear on the screen Chapter 8 Other Functions and Settings Ll 06701719 15 50 18 10 dB Ref 98 8 dBpU PEAK Log Print Save Print gt Save gt Pasar ds Pa y o AL Return SPAN 1 000 GHz EET SWEEP 50 ms fitt 10 dB CENT 500 MHz RBU 3 MHz UBU 1 MHz Figure 8 3 Print Save Menu Print User can choose the printer type in the submenu of this soft key see figure 8 4 Save This soft key is used to manage the pictures that user has been saved The submenu of this soft key is shown as figure 8 5 IDI 07 04 10 10 35 40 Ref 10 0 dBm PEAK Log 10 dB Printer Epson ESC P HP PCL gt Return CENT 500 MHz SPAN 1 000 GHz RBU 3 MHz UBU 1 MHz SUEEP 20 ms fitt 10 dB Figure 8 4 Printer Menu I 07704710 11 10 24 Ref 10 0
128. m Equi BER Pre FEC AS lt 1 0E 9 t BER Post FEC EN MER 32 0 dB 80 1 1 1 1 ENN 8 2 dB ae ops 1pS 2s 3pS Em 1 7 x 3 Equalizer PJ 0 6 Freq 0 QE 0 0 Resp i Frequency RI 9 9 i 5 Response 1 1 1 1 1 SNR 32 4 dB 2 50 1 25 0 MHz 1 25 2 50 CS 83 6 dB 120 Group CI 34 dB 60 Delay a ee req set Delay 1 58 KHz nS Real Symb 120 n 1 i 7 6 875 MS S 2 50 1 25 0 MHz 1 25 2 50 SYMB FEC g STREAM amp m Return Tine 0 0 8 CENT 355 000000 MHz Att dB O dB Figure 6 7 Equalizer Display There are three different messages display in the equalizer screen 1 The output of the Equalizer coefficients This feature can be used to diagnose channel distortion gain tilt reflections etc The bar graph showing the 32 coefficients 8 Feed Forward Equalizers FFE and 24 Decision Feedback Equalizers DFE The eighth coefficient is the main signal path so it is normally very close to 0 dB unity gain 2 Frequency response of the tested channel The amplitude is from 5dB to 5dB 3 Group delay shows the delay in nsec from 120 to 120 nsec across the channel bandwidth Chapter 7 Tracking Generator and HFC Analyzer D 06 10 17 14 09 00 64 Qan Symb 6 875000 msys 00m Equi BER Pre FEC lt 1 0E 9 Set Equ gt BER Post FEC lt 1 0E 9 all MER 32 5 dB ENM 8 2 dB mms x PJ 0 5 QE 0 0
129. o Mal PLAN tt NEEN 10 dB SPAN 10 00 MHz SWEEP 50 ns CENT 150 00 MHz xRBHU 1 MHz UBU 1 MHz Att Figure 3 37 Title input Rotating the knob the cursor under the character will move with it Set the cursor down the character user want to choose then press Select The selected character will appear in the title position see Figure 3 37 Press key can erase the unwanted character Press OK to finish the title input Otherwise the input will be lost after pressing Return 3 3 9 Double Window By this function user can view the integral information of the signal in one window while observe the detail of it in the other window Press WINDOW key on the front panel two windows of the same size will appear which is shown as figure 3 38 IDI 06 01 16 16 21 35 Ref 77 0 dBpU PEAK Log 10 dB A Windows Active Flag of Zone the Window Center 1 Zone iH Raia po A mp Zone PK Right CENT 150 00 MHz SPAN 50 00 MHz O xRBU 1 MHz UBU 1 MHz SWEEP 50 ms Att 10 dB Zone Ref 77 0 dBpU PEAK Log 10 dB PK Left mE Dow Zoom Sel on 773 Window Off CENT 150 000 MHz SPAN 1 000 MHz ft xRBU 1 MHz UBU 1 MHz SWEEP 50 ms fitt 10 dB Figure 3 38 Double Window Menu Cha
130. of this key 4 CAL Calibration setting key You can calibrate the frequency amplitude or both of them in the menu of this key Also you set the On Off of calibrate data and response data RESET Reset Key 2 4 5 DATA 4 0 19 Number key e Dot key gt Negative Backspace key ENTER Enter key Press to confirm the input ESC ESC key Press to escape the current state 6 SELECT Down key Spese ees 9 KNOB Chapter 2 Getting Started 2 2 Rear Panel O 0 0 0 O OA a ON OFF CHARGER O s COM LS O O VIDEO O o SMDEO O z PARALLEL VGA LJ EE KENBOARD O b 0 Ld 0 0 es emi ed Ac 0 2 3 4 5 Figure 2 3 Rear panel 1 Nameplate Company information 2 Tag Instrument information 3 Video Output Option 7 Composite Video output Port of the display screen 4 S Video Output Option 7 S Video output Port of the display screen 5 VGA Output Standard VGA output port 6 Keyboard Standard PC keyboard output port Caution Please shut down the power before connect a keyboard with the analyzer or it may be damaged 7 Parallel Port Standard port for printer Caution Please shut down the power before connect a printer with the analyzer or it may be damaged 8 RS 232 RS 232 port for communication Caution Please shut down the power befor
131. ononcnonononcnononnnnnnno non n nano nennen errem nnne 7 3 Testing result perve rere e pe eicere ee A ege aee eee 7 3 Calibration Men c on 8 2 Config NM 8 2 Print Save Menu iie Pau a idad 8 3 POEMA Reden ER DER 8 3 SIYCAMarce EE 8 3 Transmit Menu EE 8 3 Interface f DMpP eXe I n 8 3 View Picture 32 oreet qiio eei be oi ID ERU RR EHE 8 4 Preview Adult 8 4 Baud Rate Setting Menu oed eec dee eee ee ee te ied ce e decet Epp ede eec 8 4 MiuxIuEe E eee 8 4 Pall tte Setting m 8 4 System Default Palette 5 5 2 mte te eti Het tante ete ue 8 5 Figure 8 14 Figure 8 15 Figure 8 16 Figure 8 17 VI Abut MENU NEN DETTO TERRITI rouse as a a eaa ELENEN E tEn TRANS 8 5 Status Men tr AE E E EA 8 5 Date Format Selection menu ccccccccsseseecececececeessececeeeceauenseeeceeeeeaueeseeeeeeeseaueeseceeseeeeaaseeeeeesseauaaeeeeeeeseeas 8 5 Update EpL ae ee ane eee i eee ieee ee 8 6 1 Introduction Main Points of This Chapter O Prepare for use O About the user manual O ESD Electrostatics Discharge O Technical support amp other services Chapter1 Introduction 1 1 Chapter1 Introduction 1 1 Prepare for Use 1 1 1 Check the Instruments Check the instrument after you unload it
132. ould edit the limit line table firstly according to the actual demand After pressing the Settings soft key the settings menu will appear 4 4 IHI 06701718 17 02 55 Log 10 dB Ref 68 8 dBpU PEAK E Limit 1 Save Stop FREQ Start AMP Stop ANP 200 00 MHz 68 8 dBpy 68 8 dBp zT MHz 68 8 dBpU 68 8 dBp 200 00 MHz 68 8 dBpU 6818 ABH 4 OFF 100 00 MHz 200 00 MHz 68 8 dBpU 68 8 dBp 5 OFF 100 00 MHz 200 00 MHz 68 8 dBpU 68 8 dBp 6 OFF 100 00 MHz 200 00 MHz 68 8 dBpU 68 8 dip 7 OFF 100 00 MHz 200 40 MHz 68 8 dBpu 68 8 dbp 8 OFF 100 00 MHz 200 00 MHz 68 8 dBpU 68 8 dBp li dul il li Mak DM CENT 150 0000 MHz SPAN 100 0 KHz BEN RBU 3 KHz UBU 3 KHz SWEEP 400 ns Att 10 dB Figure 4 10 Edit Limit Line From the Figure 4 10 we can know that user can edit eight items to set the Limit Line User can use knob to select one of them to edit There are three types of Limit Line they are MAX MIN and OFF User can use up cursor and down cursor to change it The MAX means the value that user set is the maximum value if the value measured is higher than this set value then it is unqualified so does the MIN and if user select OFF this Limit Line will be useless User can modify the value of Start FREQ Stop FREQ Start AMP and Sto
133. p AMP by using the digital keys user should press soft key Save to save settings Chapter 5 CATV Analyzer 5 CATV Analyzer Option 1 Main Points of this Chapter O Channel Measurement O Scan Channel O FCC Report e HFC Measurement Er oam COPE IDI 06 07 14 14 14 04 Ref 98 8 dBpU PEAK Log 10 dB Mode 1 Spectrum i fnalyzer gt NI UU zm i MEAN HFC Analyzer gt Tracking Generator gt CENT 500 MHz SPAN 1 000 GHz RBU 3 MHz UBU 1 MHz SUEEP 50 ms fitt 10 dB Figure 5 1 Mode Menu Press CATV Analyzer in the Menu to enter the CATV Test Mode IDI 06701718 09 04 26 10 dB Ref 103 8 dBpU SMPL Log CATU Meas Settings gt Channel Meas gt Scan Channel gt Cal Base i Noise i Sys Meas gt A i CENT 500 000 MHz SPAN 8 000 MHz DM RBM 100 KHz VBW 100 KHz SWEEP 50 ms fitt 45 dB Channel Figure 5 2 CATV Root Menu Chapter 5 CATV Analyzer 5 1 CATV Standard and System There are many different TV standards in use around the world defining in detail the base band and RF structure of the signal but for th
134. pU AUG Log 10 dB Ch Space Single SPAN 16 00 MHz CENT 339 00 MHz M RBU SWEEP 50 ms Att 30 dB BU 300 KHz VBU 1 MHz ADJ CHAN POWER Pur 75 40 dBpU Up 0 26 4B Lou 1 10 4B CSP 4 00 MHz CBW 8 00 MHz Stop Meas Figure 4 6 Adjacent Channel Power Menu 4 2 Demodulation Measurements 4 2 1 Demodulation Mode In Auxiliary Measurements Menu user can press soft key demodulation to enter the demodulation Menu and then user can press related softkeys to select AM demodulation or FM demodulation the default is AM demodulation 4 2 2 Listen On Once user select Listen On the main window display the waveform after demodulation and the information window at the bottom display the volume user can use rotate knob to change the volume meanwhile user can change the center frequency also The following figure shows the Listen On state IDI 06 01 18 16 59 06 Ref 98 8 dBpy FMU Log 10 dB Demoder Demoder AM FH ES ore Fi FM Gain H L d I TH l l d PENE Y CENT 99 000000 MHz SPAN O Hz RBU 300 KHz UBU 100 KHz SWEEP 50 ms Att 30 dB Volume Return Figure 4 7 Listen On 4 2 3 FM Gain FM Gain is the gain of the signal t
135. pter 3 Basic Measurement The upper window shows the wide BW information of the signal the parameter settings of this window is the same as the single window The nether window shows the information of the zone plotted by two blue lines Two windows can take different settings So the nether window can be the stretch of the upper window When the two blue lines are set in the sweep span of the upper window Also they can work separately too The start and stop frequency of the nether window can be set outside the sweep span of the upper window At that time the two blue lines will lays at the leftmost or rightmost side of the upper window User can watch the spectrums with different settings But at one time there is only one settings of the window can be changed We call this window the active of which there is a sign A displayed on the up right User can separately set the parameters of two windows such as reference level sweep span RBW VBW sweep time center frequency etc Note Window function will be available only when the instrument is in Spectrum Analyzer mode 1 Zone Selection Zone selected operations include Zone Center Zone Span Zone PK Right and Zone PK Left The span and frequency of nether window will change with the change of the zone Note 1 The zone selection is valid only when the upper window is active 2 After zone selection the wave of nether windo
136. r To Ref Lul All Off 1 2 More gt CENT 518 0 MHz SPAN 200 0 MHz m RBU 1 MHz UBU 1 MHz SWEEP 50 ms fitt 10 dB Figure 3 24 Delta Marker 3 Fixed Mark Fixed Mark is similar to Delta Mark the main function is also to view the deference of two markers and the method to change the position of the second signal is the same But the first marker will be frozen after setting the Fixed Mark to On and its position will not change with the signal again except when the reference level or the frequency is changed the absolute amplitude and frequency value of this marker is unchanged 4 Multi marker and Marker Table Press 1 2 More soft key the second menu will appear 3 12 Lo 06 01 16 15 50 57 MKR 600 4 MHz Ref 76 5 dBpU PEAK Log 10 dB 42 82 dBpU Normal 21 Count on ETSI Select Mkr Al A 3l 4 i 5 6 8 H EB ore Mark Table on CN E A hy t noise on 938 Noise Hz On 9338 2 2 more gt CENT 518 0 MHz SPAN 200 0 MHz i RBW 1 MHz UBU 1 MHz SWEEP 50 ns fitt 10 dB Figure 3 25 Multi Marker The instrument can display 8 markers simultaneously After pressing Select Mkr soft key User can switch between these markers and set the On Off state of it For example If the current marker is marker 2 and user want to c
137. r Zoom In Display Mode After pressing this soft key the submenu of it which is shown as Figure 6 4 There are three modes user can choose in this submenu Chapter 7 Tracking Generator and HFC Analyzer Continuous In this mode the Instrument continuously plot new symbols on the screen and do not clear old symbols until the Refresh soft key in the figure 6 2 is pressed or display mod is set again There is no limit to the number of symbols that are displayed in this mode Cyclic In this mode the Instrument plot the number of symbols specified in the sample length on the screen and then clear them all and start again Time Filter In this mode the Instrument plots the number of symbols specified in the sample length and then uses a first in first out FIFO function to clear the oldest symbols and plot new symbols The number of symbols displayed on screen is always the same If user chooses the Cyclic or the Time Filter mode User can enter the sample length for example 8000 the default value IDI 06 06 29 15 25 50 64 Qam Symb 6 875 MS S Const Mode BER Pre FEC lt 1 0E 9 Continuous BER Post FEC E amp amp lt 1 0E 9 Cyclic MER 38 8 dB ENM 15 0 dB x 5 Filter PJ 0 3 a QE 0 0 bs Al 0 1 x SNR 42 3 4B e a CS 43 1 dB CI gt 34 dB Freq Offset 1 10 KHz se m Real Symb 6 875 MS S SYMB A FEC A STREAM
138. racker Amp po 8 dBpU Fon ort TG Level Power Cal Normalize Mark E Fel Return CENT 500 MHz SPAN 1 000 GHz TG MENN RBU 3 MHz UBU 1 MHz SWEEP 50 ms fitt 10 dB Figure 7 3 Tracking on Perform Normalize operation should connect the TG OUT straight to RF IN too It is different from power calibration The actual output of TG will not be changed After pressing this key the output line is corrected to a beeline The difference between this beeline and its pre curve is memorized And correction data will be used in the future testing But when frequency reference level attenuator or output level is changed the correction data will be lost and user should normalize it again Also it will be lost with the power off of the analyzer When the unit of reference level is dBm dBmV or dByV by pressing the Mark soft key and changing the status of it the test result of the marker s displayed on the information window can be the absolute value or the relative value to the TG ideal output level From the figure 7 4 we can clearly view the difference between these two display mode IDI 06 05 12 08 59 27 MRR 594 MHz Ref 98 8 dBpU PEAK Log 10 dB 90 81 dBpU Normal 21 2 1 Count
139. reen will display as Figure 2 5 shows Except the same screen information as the single window there is an A flag on the right up corner of the up down screen It indicates the current active window IDI 06 01 19 14 54 52 A Ref 98 8 dBpU PEAK Log 10 dB A Windows Zone Center ad a y Livi sacl A Line Dll P A yd Peta Span Zone PK Right CENT 500 MHz SPAN 1 000 GHz A RBU 3 MHz UBU 1 MHz SWEEP 50 ms Att 10 dB Zone Ref 98 8 dBpU PEAK Log 10 dB PK Left Win Select EU Down Lape TERT PETA FEN TE Farm NERO Zoon Sel On E Window Off CENT 500 MHz SPAN 100 0 MHz RBU 1 MHz UBU 1 MHz SUEEP 50 ms ftt 10 dB Figure 2 5 Double window 2 8 3 Information Window The information window only appears in some special conditions such as in CATV measure FM demodulation or channel power measure Figure 2 6 shows the display of information window IHI 06701719 14 55 10 Log 10 dB Ref 103 8 dBpU SHPL CATU Heas Settings gt Channel Meas gt Scan Channel gt Cal Base Hi MN Noise f Sys Meas gt CENT 500 000 MHz SPAN 8 000 MHz E RBU 100 KHz UBU 100 KHz SWE
140. rmonic distortion lt 25dBc Non harmonic distortion lt 35dBc Output impedance 750 500 SWR lt 2 5MHz 1000MHz ATT210dB POWER Specifications O Battery type Rechargeable Li lon battery 14 4V 6Ah Charger Type Charger 19V 3 42A Charge Time 6 hours Operating Time 22 5 hours ther Specifications Temperature Operating 0 C 50 C Temperature Storage 20 C 55 C Dimensions W X H X D 340mm X 160mm X 350mm Weight with battery 9 kg Display type 16cm 6 4 inches TFT color LCD Display resolution 640 X 480 pixels CATV Measurement Specifications Option 1 9 2 Channel selection Frequency Channel Channel plans Custom plans NTSC PAL TV channel amplitude range 20 dBuV 125 dByuV 1 0 dB 20 C for S N gt 30 dB TV Visual Frequency Accuracy Carrier Frequency 2 x10 Resolution 1Hz Visual Aural Delta Frequency Accuracy 200Hz Resolution 1Hz Visual Aural Delta Amplitude 1dB S N 30dB Chapter 9 Appendix FM Deviation Range 100KHz Accuracy 2 KHz lt 80KHz 3 KHz 280KHz and lt 100KHz HUM Low Freq Disturbances Modes CW or Video In Service Range 1 20 Accuracy 10 5 from 1 5 1 from 5 20 Modulation Depth AM range 40 95 Resolution 0 1 Accuracy 1 5 CCN gt 40dB Signal type Use VITS line wit
141. s Tel 86 22 27682088 Fax 86 22 27645002 Add No 40 Yibin Road Nankai District Tianjin 300113 P R China Domestic Customers deviser deviser com cn Overseas Customers overseasbiz deviser com cn Visit www devisertek com Chapter1 Introduction We will continuously improve our software to match the application developments and the users requirements We will constantly provide the application datum for the special uses of different application areas DS8821 serial spectrum analyzer has two models DS8821A 50Qinput impedance and DS8821Q 75Qinput impedance There are totally 7 options that can be chosen by user See Table 1 2 Options Function description 1 CATV Measure the indexes of analog measurement cable TV 2 Narrow RBW RBW to 30Hz VBW to 1Hz 3 Line Selection in CATV 4 QAM analyzer Take the on line measure of CATV by line selection Measure the indexes of Digital TV 5 Tracking 3 generator 0 60dbm Tracking generator 6 Q Lab Management software of DS8821 serial spectrum analyzer 7 Video output converter Convert the VGA signal to RCA and S Video output Table 1 2 Options If you have the requirement of software or datum Please connect us directly or connect the nearest agent of us 1 3 Chapter 2 Getting Started 2 Getting Started Main points of this Chapter Front Panel of Instrument Rear Panel of Instrument Screen Annotation
142. s Average On Off QAM Channel Spacing Stop Meas Channel Band Width Occupied BW Power Demod AM FM Listen On On Off Return FM Gain Return Limit Test On Off Limit Line On Off Beep On Off Save Settings Stop Meas Return 2 11 Chapter 3 Basic Measurement Band Width Settings Res BW Auto Manu Video BW Auto Manu Video Avg On Off CAL Calibration Settings Calibrate Freq amp Amp Calibrate Frequency Calibrate Amplitude Cal Data On Off Resp Data On Off CONFIG Configuration Settings SN 9600 Select Prn Sav 19200 RS 232 Baud Rate 38400 Set Clock On Off 57600 Language Select gt 115200 Print Save gt 1 2 More gt eturn Epson ESC P 1 Pic Page HP PCL gt 2 Pic Page nglish Return turn Chinese Transmit File gt gt RS 232 Return Delete File USB Disk View Return Print Preview Save gt Page Up eturn Page Down Return Return ervice gt gt RS Update Palette gt USB About Status gt Return Date Format gt nfo 2 More gt Wave Edit Back Back YY MM DD Save Auto set gt gt MM DD YY Load Save DD MM YY Delete Return View Return Return 34 Return Yes No Return Indoor Outdoor Return Chapter 3 Basic Measurement FREQUENCY Frequency Settings Centr Freq Start Freq Stop Freq Freq Step Auto Manu HOLD Hold current screen no menu MEAS Measure Settings NdB PTS On Off Disp Line On Off
143. s the Status menu then the submenu of it which is shown as figure 8 15 will appear on the screen In this menu user can choose to Save the current status Load or Del an existing status or View all the existing status user have ever saved E Status J IEI 06706707 16 11 11 Ref 98 8 dBpU PEAK Log 10 dB Save Load Del View Return SPAN 1 000 GHz ET SWEEF 50 ms fitt 10 dB CENT 500 MHz RBU 3 MHz UBU 1 MHz Figure 8 15 Status Menu 8 2 9 Date format This soft key is used to set the date display format for different convention of different counties IDI 07 04 10 09 13 38 Ref 5 0 dBm PEAK Log 10 dB Format 1 MM DD YY DD MM YY ibt a cn CENT 60 500 MHz SPAN 8 000 MHz RBU 100 KHz UBU 100 KHz SWEEP 20 ns fitt 15 dB Return Figure 8 16 Date Format Selection menu 8 3 Software Update If you need to update the software you can ask us for new software There are also two ways to update the software one is by USB disk and the other by COM Update by COM Copy the update folder to the PC run update exe in this folder Press Service soft key in figure 8 2 b select RS Update then the update will start Update by USB Copy the update folder to the root
144. sure With option 3 user can measure CSO and CTB without turning off the carrier User can select one quiet line of the vertical blanking interval to test CSO and CTB But to test CTB it requires a hardware blanking switch in the head end to absent the influence of the carrier In this way user can check the selected video line the measure using by pressing the View soft key IDI 06 06 05 09 52 36 MKR 176 458 MHz Ref 108 8 dBpU AVG Log 10 dB 77 10 dBpy ICTB CS01 Return Add Att Sub Att l y Ma Measure 1 25 CTB 1 25 Continue 0 25 p 25 CENT 176 250 MHz SPAN 8 000 MHz gt RBW 30 KHz VBW 100 Hz SWEEP 5 s Att 40 dB Next Beat Channel C 118 25 dBpU C CSO 41 14 dB Offset 208 000 KHz 1 3 More gt C CTB 8 37 dB Offset 16 000 KHz a IDI 06 06 05 09 57 46 MKR 176 426 MHz Ref 108 8 dBpU AVG Log 10 dB 78 76 dBpU CTB CS01 Line Field ZW Even fiverage li on ET t ee en UY ROA nece chan 1 25 CTB 1 25 Last Chan 0 25 p 25 CENT 176 250 MHz SPAN 8 000 MHz gt Gate RBU 30 KHz UBU 100 Hz SUEEP 5 s fitt 40 dB O Channel 7 t C 118 25 dBpU C CSO 39 48 dB Offset 176 000 KHz 2 3 More gt C CTB 8 37 dB Offset 16 000 KHz
145. t On 7 Preamplifier There is a preamplifier in DS8821 By pressing Int Amp Soft key user can set the On Off state of this amplifier according to the signal intensity Chapter 3 Basic Measurement 3 2 Basic Parameters Settings Basic parameters of spectrum refer to RBW VBW sweep mode sweep time trig mode etc The keys about these settings are located on the bottom of front panel which is shown as the follow picture E T pn rn Jc up em m 3 2 1 Band Width me Press BW key the submenu of it will appear which is shown as Figure 3 12 IDI 06 01 16 15 42 33 Log 10 dB Ref 68 5 dBpU PEAK C BU Res BU Em Manu Video BU GU Manuj Video Avg TE nm A CENT 150 0000 MHz SPAN 200 0 KHz Lia RBU 10 KHz UBU 10 KHz SWEEP 150 ns fitt 5 dB Figure 3 14 BW Menu 1 Resolution BW Resolution bandwidth RBW refers to the IF filter bandwidth of spectrum analyzer RBW define the smallest frequency difference of two adjacent signals that can be distinguished by the spectrum analyzer So the narrower the RBW is set the higher precision the spectrum has But it need more establish time with narrow RBW see also 3 2 2 If the sweep time can t fulfill the requirement of RBW the system will give the prompt UNCAL
146. the up down key b Page 2 3 M 103 8 dBpU supe O1 18 EO CATU Meas Prud d Before channel measurement user should select one Channel E s channel with inputting a channel number or frequency point first Otherwise an error message 01 Please Input Listen ON gt channel will display on the screen and indicated to input channel firstly After having specified the channel user FM DEV gt can start channel measurements fon 58 8 dBpU sube fae 99054 CATV Meas Depth MOD gt i Channel MM Carrier I Ed 2 Listen ON gt CENT 500 000 MHz SPAN 8 000 MHz gt RBU 100 KHz UBU 100 KHz SWEEP 50 ms fitt 45 dB Prev Menu Channel FM DEV gt 1 3 More gt Depth MOD gt a Page 1 3 i Carrier E Tae I l p Lul Freq gt Ret 103 8 dBpU sii tag MA CATU Meas AZ Y CENT 68 500 MHz SPAN 8 000 MHz gt Carrier RBW 100 KHz UBW 100 KHz SWEEP 50 ns ftt 0 dB Prev Menu Noise gt Channel 01 Please Input Channel 1 3 More gt HUM gt Chosen Figure 5 14 Notice User to Input Channel
147. the CATV root menu user can do the system base noise calibration The base noise calibration is to collect the analyzer local noise data overall span in order to calculate the Analyzer Noise Correction data which is used during some special measurements e g CCN and CSO CTB So during this process user should cut off all input signals use the 75Q load if possible It spends about ten minutes for this work 5 3 Channel Table Press Settings in the CATV root menu and choose Channel Table in the sub menu of it Then all the TV plans will display on the screen IDI 06 10 03 12 00 19 Ref 43 8 dBnU SMPL Log 10 dB CATY Meas Channel Table gt Select ET ne Frequency Setup gt y i Amp Unit gt 1 T pos 11 t m finplif ier CENT 52 500 MHz SPAN 8 000 MHz gt RBU 100 KHz UBU 30 KHz SUEEP 20 ms fitt 25 dB Channel Return Figure 5 4 CATV Settings Menu Li 06710703 12 00 49 Ref 43 8 dBmU SMPL Log 10 dB TU Plans Caption Create Date Number State gt China 2006 10 13 13 57 17 99 In Use Activete Europe 2006 10 13 15 34 25 100 Uk 2006 10 13 13 43 00 108 NTSC Std 2006 10 13 15 00 43 157 Edit gt 3 2006 10 13 16 15 17 39 Delete Download gt Upload gt CENT 52 500 MHz SPAN 8 000 MHz RBW_ 100 KHz UBU 30 KHz SWEEP 20 ms Att 25
148. the frequency difference of two points which amplitude is 3dB lower than the peak value 3 3 6 Display Line and Display Delta Set Disp Line to Or a red line will appear in the mid of the screen and the amplitude of it will appear on the up right of the screen After setting Disp Line to On set DL Delta to On At that moment the wave will be memorized and the amplitude difference of current wave and the memorized will be displayed around the Disp Line 3 15 Chapter 3 Basic Measurement 3 3 8 Title Press Title gt soft key the submenu of it will appear IDI 06 07 14 13 18 42 Ref 98 8 dBpU PEAK Log 10 dB Measure DL 58 N dB PTS i on i AR Disp Line JW orr n P EIE or Tenper Voltage T j kin i CENT 150 0000 MHz SPAN 500 0 KHz gt x RBU 30 KHz UBU 30 KHz SWEEP 50 ms fitt 10 dB a Disp Line in Default Position IDI 06 07 14 13 19 06 Ref 98 8 dBpU PEAK Log 10 dB Measure n N dB PTS all on ET EN Disp Line i jja i Ul gg ore t TIEN ore Temper Uoltage m Title gt C
149. tion The only difference is that there is no channel no and channel caption in the frequency setup These settings will be called when the channel input mode is set to frequency mode IEI 06710703 12 05 38 Ref 43 8 dBnU SMPL Log 10 dB D Freq Channel NO Channel Caption s DK fAnalog Digital fma log Standard PAL D Suppress Modulate Type Drop Vertical Carrier Center Frequency gt fiudio 1 Offset 6 500 MHz fiudio 2 Offset 6 500 MHz Channel Bandwidth 8 000 MHz Synbol Rate ral Depth Modulation Gate OFF Depth Modulation Field mi Depth Modulation Line CI Pouer Frequency 50 Hz CLDI Field Odd CLDI Line 19 CLDI Signal CCIR LINE17 CENT 52 500 MHz SPAN 8 000 MHz EEE RBU 100 KHz UBU 100 KHz SWEEF 20 ms fitt 25 dB Return Figure 5 10 Frequency Setup Menu Amp Unit Select the amplitude units that will be used in all of the CATV tests Amplifier Define the state of internal amplifier When it is set to Auto in channel test the analyzer will automatically set the amplifier to on off according to the total channel power While if it is set to On Off the analyzer will only change the attenuator to adapt to the channel power and keep the amplifier state unchanged IDI 06 10 03 12 05 46 A Ref 43 8 dBmU SMPL Log 10 dB Amp Units
150. w will not be refreshed at the time 1 Zone Center The center frequency of nether window will change with the change of Zone Center while the span of it will be unchanged There are two ways to change the Zone Center gt Press Up Down key the step is 1 10 of the span gt Rotating the knob the step is 1 500 of the span User can take same ways to change Zone Span Zone PK Right and Zone PK Left 2 Zone Span The span of nether window will change with the change of Zone Span In some cases the change of Zone Span will cause the RBW VBW and sweep time changes of nether window 3 Zone PK Right Left Press Zone PK Right Left soft key to change the right left limit of the zone 2 Window Switch Press Win Select to activate the window user needed 3 Zoom Selection Set Zoom Sel to On then user can zoom the active window to full screen IDI 06701716 16 23 01 Ref 77 0 dBpU PEAK Log 10 dB Windows Zone Center A ae Zone Span Zone PK Right Zone PK Left Vin Select up FES Zoon Sel Co or Window Off CENT 149 900 MHz SPAN 1 000 MHz xRBU 1 MHz UBU 1 MHz SWEEP 50 ms ftt 10 dB Figure 3 39 Zoom Select On 3 17 Chapter 4 Auxiliary Measurements 4 Auxiliary Measurements Main points of this chapter O Channel M
151. y on E Select Mkr Al 2 3 4 Ei 6 7 8 Marker 5 WE ore WEE ore Mark Noise On E CENT 500 MHz SPAN 1 000 GHz MIES Noise Hz RBU 3 MHz VBW 1 MHz SUEEP 50 ns ftt 10 dB on EZ 1 5 594 MHz 90 81 dBpU 2 386 MHz 90 79 dBU 6 Jd 2 2 more gt 4 8 a Absolute Value Display ips 06 05 12 08 59 37 MKR 594 MHz Ref 98 8 dBpU PEAK Log 10 dB 0 01 dB 185 53 TG I g Eg or TG Level Power Cal Normalize abs E39 CENT 500 MHz SPAN 1 000 GHz m RBU 3 MHz UBU 1 MHz SUEEP 50 m Att 10 dB 1 5 594 MHz 0 01 dB 2 386 MHz 9 01 dB 6 3 Return 4 8 b Relative Value Display Figure 7 4 Two Marker Display Mode Chapter 7 Tracking Generator and HFC Analyzer Here is an instance to use the TG to measure a filter 1 Press the CAL on the front panel and select Calibrate Amplitude soft key to do an analyzer calibration 2 Turn on the TG and connect the TG OUT to RF IN which is shown as figure 7 2 3 Do a TG power calibration and then press Normalize soft key 4 Connect the TG OUT tested component and RF IN well as figure 7 5 shows 5 The testing result will be displayed on the screen Figure 7 5 Tested Component Connection diagram IDI 06 04 21 16 08 31 MKR 95 4 MHz Ref 108 8 dBpU PEAK Log 10 dB 104 23 dBpU INornal 21 rh Count on 8 Select 2 Mkr 4 2 3 4 B el 7 el Marker 5 Lon ovr 7 i

DS8821 SPECTRUM ANALYZER OPERATION MANUAL

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