Home

Anritsu 681XXC Portable Generator User Manual

1. SCALAR NETWORK 8757D Scalar Network Analyzer SNA The following paragraphs pro ANALYZER vide instructions for connecting the 681XXC to the HP8757D SNA and setting up the signal generator so that it can operate as a signal source for the analyzer Operating instructions for the scalar network analyzer can be found in the Hewlett Packard 87570 Scalar Network Analyzer Operation Manual SWP DWELL IN STOP SWEEP SEQ SYNC POS Z BLANK HORIZ OUT SWEEP IN 0 10V TLIN MODULATOR DRIVE 8757 SYSTEM AUX IEEE 488 INTERFACE 1 0 GPIB he 4 681 HP8757D SCALAR SIGNAL GENERATOR NETWORK ANALYZER To 007 0 SENSOR Figure 7 4 681XXC to HP8757D SNA Connections Connecting the 681XXC to the HP8757D 7 16 Connect the 681XXC signal generator to the HP8757D scalar network analyzer as shown in Figure 7 4 Connect one end of a GPIB cable to the 681XXC rear panel IEEE 488 GPIB con nector Connect the other end to the HP8757D rear panel 8757 SYSTEM IN TERFACE connector Step 1 Step 2 Connect one of a coaxial cable having BNC connectors to the 681XXC rear panel LIN connector Connect the other end of the cabletothe HP8757D rear panel MODULATOR DRIVE connector 681XXC OM USE WITH OTHER INSTRUMENTS 681XXC OM Setting Up the 681XXC USE WITH A HP8757D SCALAR NETWORK
2. IEEE 488GPIB RF OUTPUT Figure 7 3 360B VNA to 681XXC Signal Generator Connections 681XXC OM Connecting Connect the 681XXC signal generator to the 360B the 681XXC to Vector Network Analyzer as shown in Figure 7 3 the 360B Step 1 Connect one end of a coaxial cable to the 681XXC rear panel FM IN connector Con the other end to the 360B rear panel EXT FM LOCK OUTPUT connector Step2 Connect one end of a coaxial cable to the 681XXC rear panel 10 MHz REF IN con nector Connect the other end to the 360B rear panel 10 MHz REF OUT connector 7 11 USE WITH OTHER INSTRUMENTS Modes of Operation Source Lock Mode 7 12 USE WITH A 360B VECTOR NETWORK ANALYZER If the 681XXC contains an Option 16 high stability time base connect the coax ial cable between the 681XXC rear panel 10 MHz REF OUT connector and the 360B rear panel 10 MHz REF IN connector Connect one end of a GPIB cable 1 meter in length to the 681XXC rear panel IEEE 488 GPIB connector Connect the other end of the cabletothe 360B rear panel SOURCE CONTROL SYSTEM BUS connector Step 3 Turn on the 681XXC and configure it as described in the following paragraphs Step 4 There are two 360B VNA receiver modes of opera tion that are used with the 681XXC the 3608 source lock mode and the 360B tracking mode The configuration and operation of the 681XXC for both modes of operation are descr
3. Cal To select internal ALC press Internal Pressing one of the other leveling menu soft keys External Detector Power Meter or Fixed Gain will turn off internal leveling Press Previous Menu to return to the ALC Mode Menu display External Leveling external leveling the output power from the 681XXC is detected by an external detector or power meter The signal from the detector or power meter is returned to the ALC circuitry The ALC adjusts the output power to keep the power level constant at the point of detection The external AL C source in put is selected from the leveling menu 681XXC OM 3 61 LOCAL FRONT PANEL OPERATION 3 62 LEVELING OPERATIONS Before going to the Leveling Menu from the ALC Mode menu select whether the external ALC signal is to be connected to the front or rear panel EXT ALC IN connector At the ALC M ode menu press Ext ALC Front tose lect front panel input or Ext ALC Rear to select rear panel input Now press Leveling Menu to goto the Leveling Menu below Analog Su F1 AEE Fz 8 mas Bam m E AO f ALE Laop User Cal Next select the type of external sensor you are us ing to detect the output power To select the external ALC input from an external detector press External Detector Toselec the external ALC input from a power me ter press Power Meter After you have made the exter
4. MODEL SUMMARY Model Frequency Range 68117C 0 01 to 8 4 GHz 68137C 2 0 to 20 0 GHz 68147C 0 01 to 20 0 GHz 68167C 0 01 to 40 0 GHz 68177C 0 01 to 50 0 GHz 68187C 0 01 to 60 0 GHz 68197C 0 01 to 65 0 GHz FREQUENCY CW MODE Output Twenty independent presettable CW frequencies FO F9 and 9 Accuracy Same as internal or external 10 MHz time base Internal Time Base Stability With Aging 2x 10 9 day lt 5 x 10 with Option 16 With Temperature 2 x 10 7C over 0 C to 55 C 2 x 10 C with Option 16 Resolution 1 kHz 0 1 Hz with Option 11 External 10 MHz Reference Input Accepts external 10 MHz 100 Hz 10 to 20 dBm time base signal Automatically disconnects the internal high stability time base option if installed BNC rear panel 50Q impedance 10 MHz Reference Output 0 5 Vp p into 500 AC coupled Rear panel BNC 509 impedance Switching Time typical maximum Units having a high end frequency of gt 20 GHz 40 ms to be within 1 kHz of final frequency Units having a high end frequency of 8 4 GHz 15 ms to be within 1 kHz of final frequency 681XXC OM ANALOG SWEEP MODE Sweep Width Independently selected from 1 MHz to full range continuous sweep Accuracy The lesser of x30 MHz or 2 MHz 0 25 of sweep width for sweep speeds of 50 MHz ms Sweep Time Range 30 ms to 99 seconds PHASE LOCKED STEP SWEEP MODE Sweep Width Independently selected
5. ERROR AND WARNING STATUS MESSAGES Self Test Error Normal Operation Error and Warning Status TROUBLESHOOTING ROUTINE MAINTENANCE Cleaning the Fan Filter Cleaning the Data Display ReplacingtheLineFuse Chapter 7 Use With Other Instruments 7 1 7 2 7 3 7 5 INTRODUCTION 2 o aci w aoe MASTER SLAVE OPERATION Connecting 5 Initiating Master Slave Master Slave Operation Master Slave Operation in VNAMode Terminating Master Slave Operation USE WITH A 56100 SCALAR NETWORK ANALYZER e dires mo 5 2 E Connecting the 681XXC to the 56100A USE WITH A 360B VECTOR NETWORK ANALYZER dc ade ge 40 3 oar Connecting the 681XXC tothe 360B Modes of Source Lock Mode USE WITH A HP8757D SCALAR NETWORK Connecting the 681XXC tothe HP8757D Setting Up the 681XXC Initiating HP8757D SNA Operation 7 3 7 4 7 4 7 7 7 7 7 9 7 10 7 10 7 11 7 11 7 12 7 12 7 14 7 16 7 16 7 17 7 19 681 Table of Contents Continued Appendix
6. 40 0 50 0 GHz 2 5 dBm 1 0 dBm 0 01 2 0 GHz 11 0 dBm 10 0 dBm 2 0 20 0 GHz 10 0 dBm 8 5 dBm 68187C 20 0 40 0 GHz 2 5 dBm 0 0 dBm Not Available 40 0 50 0 GHz 2 0 dBm 1 5 dBm 50 0 60 0 GHz 2 0 dBm 2 0 dBm 0 01 2 0 GHz 11 0 dBm 2 0 20 0 GHz 10 0 dBm 68197C 20 0 40 0 GHz 2 5 dBm Not Available Not Available 40 0 50 0 GHz 0 0 dBm 50 0 65 0 GHz 2 0 dBm With Option 15A High Power Installed 68117C 0 01 2 0 GHz 13 0 dBm 11 0 dBm 11 0 dBm 2 0 8 4 GHz 17 0 dBm 15 0 dBm 11 0 dBm 68137C 2 0 20 0 GHz 17 0 dBm 15 0 dBm 7 0 dBm 68147C 0 01 2 0 GHz 13 0 dBm 11 0 dBm 11 0 dBm 2 0 20 0 GHz 17 0 dBm 15 0 dBm 7 0 dBm 0 01 20 0 GHz 13 0 dBm 11 0 dBm 681676 20 0 40 0 GHz 6 0 dBm 3 0 dBm 68177C 0 01 50 0 GHz Standard Standard Not Available 68187C 0 01 60 0 GHz Standard Standard Not Available Note In models with Option 22 that have a high end frequency of lt 20 GHz rated output power is reduced by 1 dB In models with Option 22 that have a high end frequency of gt 20 GHz rated output power is reduced by 2 dB 1 4 681XXC OM GENERAL INFORMATION 1 4 IDENTIFICATION NUMBER 1 5 ELECTRONIC MANUAL 1 6 RELATED MANUALS 681XXC OM IDENTIFICATION NUMBER All Anritsu instruments are assigned a unique six digit ID number such as 875012 ThelD number is imprinted on a decal that is af fixed tothe rear panel of the un
7. 5 588 GHz Li 88 ffzet 2 00 dE AM 5 17 Level Lvl MadelRLE Cal Edit the current offset value using the cursor con trol key or rotary data knob or enter a new offset value using the keypad and appropriate terminator key To close the open offset parameter when you are done press Edit Offset or make another menu selec tion Press Offset to apply the offset to the displayed power level this example a42 00 dB offset is ap plied toL1 L1 then displays a power level of 42 00 dBm 5 500 000 000 8 GHz Leuel L1 2 06 dEm E ALC Loor User cal 681XXC OM LOCAL FRONT PANEL OPERATION 3 10 POWER LEVEL SWEEP OPERATION 681XXC OM POWER LEVEL SWEEP OPERATION The signal generator provides leveled output power sweeps at CW fre quencies and in conjunction with frequency sweeps analog and step Power level sweeps can be from a high level toa low level or vice versa Power level sweeps can be selected to be linear or logarithmic The following paragraphs provide descriptions and operating instruc tions for the CW power sweep mode and the sweep frequency step power modes Use the CW Power Sweep M ode and Sweep F requency Step Power Mode menu maps Chapter 4 Figures 4 8 and 4 9 to fol low the menu sequences CAUTION Performing power level sweeps that cross step attenuator
8. You can perform a self test of the signal generator at any time during normal operation To perform a self test from any menu press EYEM Then when the System M enu below is displayed press Selftest L 6 06 dEm Selftest T a A Horr Resetti ng to You can reset the 681XXC to the factory sel ected Default default parameter values at any time during normal Parameters operation The default parameters are shown in Table 3 1 on the following page NOTE Resetting the instrument clears the setup presently in place If these parameter val ues are needed for future testing save them as a stored setup before resetting the signal generator For information on saving recalling instrument setups refer to paragraph 3 14 To reset the signal generator press KASHANI When the System Menu above is displayed press Reset 681XXC OM 3 15 LOCAL FRONT RESET DEFAULT PANEL OPERATION PARAMETERS Table 3 1 Reset Default Paramenters 1 of 2 681XXC FREQUENCY PARAMETERS GHz MODEL NUMBER FO F1 22 F4 F5 F6 F7 F8 F9 M1 M2 M5 M6 M7 M8 M9 AF 68117C 3 5 2 0 8 4 2 0 5 0 8 0 8 4 8 4 8 4 8 4 3 5 2 0 84 2 0 5 0 8 0 84 8 4 8 4 8 4 1 0 68137 3 5 2 0 20 0 2 0 5 0 8 0 11 0114 0 17 0 20 0 3 5 2 0 20 0 2 0 5 0 8 0 11 0 14 0 17 0 20 0 1 0 68147 3 5 2 0 20 0 2
9. Auto Automatic The output sweeps be tween the specified list start and stop indexes dwelling at each list index for the specified dwell time External The output sweep recurs when trig gered by an external TTL compatible clock pulse to the rear panel AUX I O connector Single Trig A single output sweep starts when the trigger key is pressed If a sweep is in progress when the key is pressed it aborts and resets a Manual list sweep default trigger mode The list index is incremented or decremented by using the front panel cursor control key The list index can also be incremented using an ex ternal trigger input Each trigger increments the list index by one 681XXC OM 3 47 LOCAL FRONT SWEEP FREQUENCY PANEL OPERATION OPERATION go to the List Sweep Trigger Menu below from the Sweep menu press Trigger Fr Bee GHz List Index L 8 01091 dBm i mM 0 0 Lo DEAN analog To select a sweep trigger mode press its menu soft key A message showing the trigger mode selected appears on the right side of the frequency title bar When you are finished press Previous Menu to return to the Sweep Menu display If you select the single trigger mode the Single soft key is replaced by the Trig soft key Pressing Trig starts a single sweep If a single sweep is in progress pressing Trig causes the sweep to abort and reset
10. Edit Start Power Level Edit End Power Level Log dBm or Linear mV Power Sweep NOTE Refer to Chapter 3 paragraph 3 10 for Sweep requency Step Power M ode operating instructions Figure 4 9 Sweep Frequency Step Power Mode Menu Map 681XXC OM 4 13 LOCAL OPERATION MAPS LEVELING MODES CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL MODULATION SYSTEM Selects Front Panel External ALC Input Selects Rear Panel External ALC Input Analogy lt CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL MODULATION Adjust the External ALC ALC Slope On Off Edit The ALC Slope Edit The Pivot Point F1 F2 Li 48 800 dBm NE FM NEC HE SYSTEM Edit Start Frequency FREQUENCY CONTROL Edit End Frequency Edit Number Of Points Selected Offset Table On Off Starts Calibration To Create Offset Table SYSTEM Figure 4 10 Leveling Modes Menu Map 4 14 Selects Internal ALC La Default Mode Selects External ALC External Detector Input Selects External ALC Power Meter Input Edit Current Power Level Decouple The Attenuator Press To Increase Attenuation 10dB Steps ui Press To Decrease Attenuation 10dB Steps NOTE Refer to Chapter 3 paragraph 3 11 for Leveling M odes operating instruc tions 6
11. Ui Bnalog NOTE With Autotrigger selected and the dwell time per step set to a small value display updating slows down This ensures that sweep speed is not adversely affected Be cause of this potential display update slow down when leaving list sweep mode with auto trigger selected for another mode Auto trigger is automatically turned off and Manual trigger is selected Thus when list sweep mode is entered the display updating will be back to nor mal speed 3 48 681XXC OM LOCAL FRONT PANEL OPERATION 3 9 FIXED POWER LEVEL OPERATION 681XXC OM FIXED POWER LEVEL OPERATION The signal generator provides leveled output power over a maximum range of up to 33 dB up to 149 dB with Option 2 for CW and sweep frequency operations Units with Option 15A provide leveled output power over a maximum range of up to 27 dB up to 141 dB with Op tion 2 Thefollowing paragraphs describe how to place the signal gen erator in fixed non swept power level mode select a power level for output select logarithmic or linear units and activate level offset Use the Fixed Non Swept Power Level Mode menu map Chapter 4 Fig ure 4 7 to follow the menu sequences Selecting Fixed Power Level Mode Selecting a Power Level To place the 681XXC in a fixed power level mode from a CW or sweep analog step or manual fre quency menu press the main menu key LEVEL ALC SELECT At the resulting menu display press Level The
12. quency or frequency sweep outside the range of the slave unit Enter ing a valid offset value dears the MASTER SLAVE OPERATION Fa 3 2 Fo 2 0 Press Menu to go tothe VNA Menu display below Fi 2 868 BEE 8 GHz This menu lets you set the frequency offset and out put power level for the Slave instrument in the VNA mode Press VNA Offset to open the slave frequency offset parameter Press VNA Level to open the slave output power level parameter Open the parameter you wish to change then edit the current value using the cursor control key or ro tary data knob or enter a new value using the key pad and appropriate termination key When you have finished setting the open parameter close it by pressing its menu soft key or by making another menu selection Press Previous Menu to return to the Slave Fre quencies List Menu display Return to the Master Slave menu and press Enable to begin master slave operation 681XXC OM USE WITH OTHER INSTRUMENTS Terminating Master Slave Operation 681XXC MASTER SLAVE OPERATION The following describes how to terminate master slave operation and return the Slave instrument to local front panel control On the Master instrument select CW mode At the CW Menu press Master Slave to gotothe Master Slave Menu display At the Master Slave Menu display press Enable This terminates master slave operation and returns the Slave
13. 4 6 4 3 Analog Sweep Frequency ModeMenuMap 4 7 4 4 Step Sweep Frequency ModeMenuMap 4 8 4 5 Manual Sweep Frequency Menu 4 9 4 6 List Sweep Frequency Menu 4 10 4 7 Fixed Power Level ModeMenuMap 4 11 4 8 CW Power Sweep Mode Menu Map 4 12 4 9 Sweep Frequency Step Power Mode Menu Map 4 13 4 10 LevelingModesMenuMap 4 14 4 11 Amplitude Modulation Menu 4 15 4 12 Frequency Modulation Mode Menu 4 16 4 13 Square Wave Modulation Mode Menu Map 4 17 4 14 System ConfigurationMenuMap 4 18 4 3 4 4 LOCAL OPERATION SAMPLE MENU MAPS MENU MAP Main Menu Key Cursor A Main Typical Menu Soft Key Points To The Menu Displayed Whenever Indicates The Active Menu Display Functional Description The Menu Soft Key Is Depressed Main Menu Key v Edit Current CWISWEEP MAN i ri Copy Current Frequency and Power to List Index EE To Master Slave ar gt Menu Not Shown Keys Edit Current IODULATIO I ower Leve EE Power Level Indicates That Pressing This Main Menu Key While In The Current Mode Displays The Parameter Control Menu Mode Soft Keys Appearance Changes To Show Current Selection Edit Current Tz Tag Untag Highlighted LECT Frequency Frequency CONTROL Edit Highlighte Edit
14. Line Voltage Selection Power Standby Operation 2 beg x BS Aw aw bo Warmup Time Bee a ek o3 3 X x3 Operating Environment GPIB SETUP AND INTERCONNECTION Interface Connector Cable Length Restrictions GPIB Interconnection Setting the GPIB Address Selecting the Line Terminator Selecting the Interface Language RACK MOUNTING KIT INSTALLATION Preliminary Procedure PREPARATION FOR STORAGE SHIPMENT Preparation for Storage Preparation for Shipment 2 1 AX CAUTION HEAVY WEIGHT 2 2 INITIAL INSPECTION 681XXC OM Chapter 2 Installation This chapter provides installation instructions for the Series 681X XC Synthesized Signal Generator It includes information on initial in spection preparation for use storage and reshipment and General Purpose nterface Bus GPIB setup and interconnections WARNING Use two or more people to lift and move this equipment or use equipment cart There is a risk of back injury if this equipment is lifted by one person Inspect the shipping container for damage If the shipping container or cushioning material is damaged retain until the contents of the ship ment have been checked against the packing
15. 5 34 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Leve Accuracy Flatness Test Record 17 of 27 Model 68147 w Option 15A Serial No Date Model 68147C with Option 15A High Power with Option 2A Step Attenuator Power Level Accuracy Power Level Accuracy CW Frequency z 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 11 dBm dBm 15 dBm dBm 10 dBm dBm 14 dBm dBm 9dBm dBm 13 dBm dBm 8 dBm dBm 12 dBm dBm 7 dBm dBm 11 dBm dBm 6 dBm dBm 10 dBm dBm 5 dBm dBm 9dBm dBm 4dBm dBm 8dBm dBm 3 dBm dBm 7 dBm dBm 2 dBm dBm 6 dBm dBm 1 dBm dBm 5 dBm dBm 0dBm dBm 4dBm dBm 1 dBm dBm 3 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 20 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 05 to 20 GHz typical not a specification 681XXC OM 5 35 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Level Accuracy and Flatness Test Record 18 of 27 Model 68147C w Option 15A Serial No Date Model 68147C with Option 15A High Power with Option 2F Step Attenuator Powe
16. SYSTEM CONFIGURATION i 5 2 ov Configuring the Front Panel Configuring the Rear Panel Configuring the RF 2o v3 4 wo hw Configuring the GPIB Setting Increment Sizes SAVING RECALLING INSTRUMENT SETUPS Saving Setups ow ooo o we ya Recalling Setups Erasing Stored Setups SECURE OPERATION REFERENCE OSCILLATOR CALIBRATION Chapter 4 Local Operati on M enu M aps 4 1 4 2 INTRODUCTION aara e a MENU 5 Chapter 5 Operation Verification 5 1 5 2 5 3 5 4 5 5 5 6 681XXC OM INTRODUCTION 2 4 ee Bard we eg TEST EQUIPMENT sss doe om ok omnem moms TESI RECORD Se cea tee 4 INITIAL 681XXC uunc a de Row x o Sell Tests RS UU 5 5 2 6 4 Resettingthe681XXC Warmup TIUS s omo RIROR Ge a CW FREQUENCY ACCURACY TEST Test 5 amp Test Procedure uos 28 42 2 5 HESS 5 POWER LEVEL ACCURACY AND FLATNESS TESTS Sh ceed Test Setup iii Table of Contents Continued Power Level Accuracy Test Procedure Power Level Flatness Test Procedure Chapter 6 Operator Maintenance 6 1 6 2 6 3 6 4 INTRODUCTION s s acs acs
17. Table 5 3 Power Level Accuracy and Flatness Test Record 8 of 27 Model 68137C Serial No Date Model 68137C with Option 2A Step Attenuator Power Level Accuracy CW Frequency 5 0 GHz Set Power Measured Power 11 dBm dBm 10 dBm dBm 9dBm dBm 8dBm dBm 7dBm dBm 6dBm dBm 5 dBm dBm 4dBm dBm 3 dBm dBm 2 dBm dBm 1 dBm dBm 0 dBm dBm 1 dBm dBm Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 1 6 dB Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 6 0 dB typical not a specification 5 26 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Leve Accuracy and Flatness Test Record 9 of 27 Model 68137C Serial No Date Model 68137C with Option 2F Step Attenuator Power Level Accuracy CW Frequency 5 0 GHz Set Power Measured Power 3 dBm dBm 2 dBm dBm 1 dBm dBm 0 dBm dBm 1 dBm dBm 2 dBm dBm 3 dBm 4 dBm dBm 5 dBm dBm 6 dBm dBm 7 dBm dBm 8 dBm dBm 9 dBm dBm Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 3 dBm dBm dB Maximum variation is 1 6 dB Power Level Flatness Analog Sweep Set Power Max Power Min Power 3 dBm dBm d
18. a source lock mode for operation with a Anritsu Model 360B Vector Network Analyzer Refer to paragraph 7 4 for information pertaining to operating the 681XXC with a 360B VNA Press SS Mode again to turn the source lock mode off Press More to goto the First Additional Configure GPIB menu for more selections Press Previous Menu to return to the System Con figuration Menu display First Additional Configure GPIB Menu When you press More the First Additional Config ure GPIB Menu below is displayed Contig GPIE Pur Meter Address 13 Meter Hn ML4865 B Language This menu lets you perform the following Select the model and set the GPIB address for the power meter that is used to create a user level flatness correction power offset table Refer to page 3 67 for a description of the function Q Select the external interface language for re mote operation of 681XXCs with Option 19 Refer to page 2 9 for more information Press Pwr Mtr Address to change the address of the power meter on the GPIB the power meter s default GPIB address is 13 Enter a new address between 1 and 30 using the cursor control key or the data entry keypad and the terminator key Hz ns ADRS The new GPIB address will appear on the display Press Pwr Mtr Select to select the power meter model being used Supported power meters arethe Anritsus ML2437A ML2438A and ML4803A and Hewlett Packard 4378 438A and 70100 681
19. Accuracy Same as internal or external 10 MHz time base Square Wave Symmetry 50 5 at all power levels External Input Front or rear panel BNC selectable from modulation menu Drive Level compatible input Minimum Pulse Width gt 5 us Input Logic Positive true or negative true selectable from modulation menu 681XXC OM PERFORMANCE SPECIFICATIONS REMOTE OPERATION All instrument functions settings and operating modes except for power on standby are controllable using com mands sent from an external computer via the GPIB IEEE 488 interface bus GPIB Address Selectable from a system menu IEEE 488 Interface Function Subset Source Handshake SH1 Acceptor Handshake AH1 Talker 6 Listener L4 Service Request SR1 Remote Local RL1 Parallel Poll PP1 Device Clear DC1 Device Trigger DT1 Controller Capability CO C1 C2 C3 C28 Tri State Driver E2 GPIB Status Annunciators When the instrument is oper ating in Remote the GPIB status annunciators listed be low will appear in a window on the front panel LCD REMOTE Operating on the GPIB all instrument front panel keys except for the SYSTEM key and the RETURN TO LOCAL soft key will be ignored LLO LOCAL LOCKOUT Disables the RETURN TO LOCAL soft key Instrument can be placed in local mode only via GPIB Emulations The instrument responds to the published GPIB commands and responses of the Anritsu Models 6600 6700 and 6XX
20. Delete Current List Index Fr 5 FREQUENCY List Index 6 CONTROL LEVEL ALG SELECT LEVEL CONTROL MODULATION aea GHz 5 EET 0 TO ee CH Analo Ste Manual i Edit List Index 2 Press to Calculate the Settings for All List Index Frequencies and Power Levels SYSTEM CH Analogy Y E t Swee 2727221 Manual Edit Start Index C D00 DoD D RE Selects Auto Trigger List Index List Index Edit Stop Index j i Level l 0 00 dBm Edit Dwell Time TENTE Selects Single Trigger gt anua1 Selects Manual Trigger i re for BH C BH LH CH Analog CW Analog Selects External Trigger NOTE Refer to Chapter 3 paragraph 3 8 for List Sweep Frequency Mode operating instructions Figure 4 6 List Sweep Frequency Mode Menu Map 4 10 681XXC OM LOCAL OPERATION FIXED POWER MAPS LEVEL MODE CWISWEEP Edit Current Power Level CONTROL 0 00 dBm Edit Power Offset _ 2 00 asra Level Offset Le MODULATION HE E Offset On Off ETE lel Mode ALC cal Level Offset Display Showing Level Offset On CWISWEEP Edit Current Tag Untag Highlighted Power Level Power Level ERE CEN nc Edit Highl
21. Fr Bee GHz List Index Analog This menu lets you insert and delete entries from the list Press Insert Entry to insert the default frequency 5 GHz and power level 0 dBm at the current list index NOTE Because the list size is fixed inserting a new index will cause the last index to be lost Whatever frequency and power level are at list index 1999 will be deleted and cannot be recovered Press Delete Entry to delete the current list index NOTE Delete entry cannot be undone Oncea list index is deleted the only recovery is to re enter the deleted frequency and power level Press Previous Menu to return to the main Edit List Menu display 3 45 LOCAL FRONT PANEL OPERATION 3 46 Selecting a List Sweep Range SWEEP FREQUENCY OPERATION Copying Data from the CW Menu An easy method of entering frequency and power level information into the current list index is to copy the data from the CW menu Fisrt go to the main List Sweep menu and press the List Index soft key to open the list index parameter Then select the list index that you want the data to be added to Next press the CW soft key The CW Menu below is displayed F1 2 8600 mas B GHz Use the Edit Fi and Edit soft keys to set the frequency and power level tothe values you wish to enter into the current list index Press the to List soft key to copy the data to the current
22. between 0 and 9 on the keypad The setup is now saved NOTE Setup 0 automatically saves the current front panel settings when the instrument is shutdown using the front panel LINE key Therefore it is recommended that you use only setups 1 through 9 to save front panel setups When instrument shutdown occurs be cause of main power interruptions the current front panel settings are not saved Torecall a previously saved setup first access the Setups Menu as described above At the Setups Menu press Recall then enter the setup number on the keypad The instrument resets itself to the recalled configu ration 681XXC OM 3 89 LOCAL FRONT SAVING RECALLING PANEL OPERATION INSTRUMENT SETUPS Erasing The front panel setups are stored in non volatile Stored Setups memory A master reset is required to erase the con tents of the setups and reprogram them with default data To perform a master reset proceed as follows Step1 With the 681XXC in standby press and The master reset function over hold the RF OUTPUT ON OFF key writes all information stored in the memory with deraut Step2 Press the LINE OPERATE STANDBY Values This includes the table of key to turn the instrument on 2000 frequency power level sets used for the list sweep mode and Step3 When thefirst menu is displayed after thefive power offset tables used for the start up display release the RF
23. lish a new reference level Output On Off Toggles the RF output between an Off and On state During the Off state the RF oscillator is turned off The On or Off state is indicated by two LEDs located below the OUTPUT ON OFF key on the front panel RF On Off Between Frequency Steps System menu se lection of RF On or RF Off during frequency switching in CW Step Sweep and List Sweep modes RF On Off During Retrace System menu selection of RF On or RF Off during retrace Internal Leveling Power is leveled at the output connec tor in all modes External Leveling External Detector Levels output power at a remote 2 5 dBA 3 5 dBA gt 6008 1 0 88 1 0 dB N A Flatness 0 25 0 8dB 0 8 dB 1 1 dB 1 198 1 1 dB 25 60 dB 0 8 88 0 8dB 1 1 dB 3 1 08 60dB 0 8 88 0 8 dB 2 1 3 1 dBA A Typical 0 to 25 dB or to minimum rated power whichever is higher 681XXC OM detector location Accepts a positive or negative 0 5 mV to 500 mV input signal from the remote detector EXT ALC ADJ adjusts the input signal range to an optimum value BNC connector front and rear panel External Power Meter Levels output power at a re mote power meter location Accepts a 1V full scale input signal from the remote power meter EXT ALC ADJ ad justs the input signal range to an optimum value BNC connector front and rear panel External Leveling Bandwidth
24. qwe Stop Frequency e Auto mE F4 5 888 222 Edit Main Sweep poem s m F 5 T re Edit Alt Sweep i nm FM Power Level Menu Edit Start Frequency NOTE Edit End Frequency Tag Untag Highlighted Edit Current Power Level Marker Frequency Edit Highlighted Marker Frequency On Off Refer to Chapter 3 paragraph 3 8 for Analog Sweep F requency M ode operating instructions Figure 4 3 Analog Sweep Frequency Mode Menu Map 4 7 CW SWEEP SELECT FREQUENCY CONTROL LOCAL OPERATION MENU MAPS STEP SWEEP FREQUENCY MODE LEVEL ALC SELECT LEVEL CONTROL 9 SYSTEM Can Be Selected From Any Step Sweep Menu Display CW SWEEP SELECT IFREQUENCY CONTROL SELECT LEVEL CONTROL MODULATION SYSTEM Edit Dwell Edit Start Frequency Time Edit End Frequency m Edit Siop Edit Number __ Edit Current of Steps Power Level Edit Sweep Time Select Log or Linear Sweep F1 2 8880 GHz F3 2 000 GHz F2 28 888 F4 5 000 E 11 0 00 dBm HO Ga Edit Alt Sweep Start Frequency Edit Alt Sweep End Frequency Edit Main Sweep Power Level Edit Alt Sweep Power Level Tag Untag Highlighted Marker Frequency Edit Highlighted Marker Fr
25. switch points can cause excessive wear on the switches and reduce the life expectancy of the step attenuator Selecting CW In the CW power sweep mode output power steps Power Sweep _ between any two power levels at a single CW fre Mode quency Available menus let you set or select the sweep range the step size the dwell time per step and the type of power sweep linear or logarithmic and sweep trigger To place the 681XXC in a CW power sweep mode from a CW frequency menu press the main menu key LEVEL ALC SELECT At the resulting menu display press Lvl Swp The CW Level Sweep Menu below is displayed This menu lets you perform the following Select a power level sweep range edit the sweep start and stop power level parameters Gotothe sweep ramp menu set the dwell time per step the step size or number of steps and select a sweep trigger 3 53 LOCAL FRONT PANEL OPERATION This error message is displayed when 1 thestep sizevalueentered is greater than the level sweep range or 2 the number of steps en tered results in a step size of less than 0 01 dB Log or 0 001 Linear Entering a valid step size will clear the error 3 54 Setting CW Power Sweep Step Size and Dwell Time POWER LEVEL SWEEP OPERATION There are two ways to set the size of each step of the CW power sweep set the step size or set the number of steps The ste
26. 1 kHz 0 1 Hz with Option 11 to full range Every frequency step in sweep range is phase locked Accuracy Same as internal or external 10 MHz time base Resolution Minimum Step Size 1 kHz 0 1 Hz with Option 11 Linear Log Sweep User selectable linear or log sweep In log sweep step size logarithmically increases with fre quency Steps User selectable number of steps or the step size Number of Steps Variable from 1 to 10 000 Step Size 1 kHz 0 1 Hz with Option 11 to the full fre quency range of the instrument If the step size does not divide into the selected frequency range the last step is truncated Dwell Time Per Step Variable from 1 ms to 99 seconds Fixed Rate Sweep Allows the user to set the total time of the sweep including lock time Variable from 20 ms to 99 seconds Switching Time typical maximum Units having a high end frequency of gt 20 GHz 15 ms 1 ms GHz step size or 40 ms whichever is less to be within 1 kHz of final frequency Units having a high end frequency of 8 4 GHz 7 ms to be within 1 kHz of final frequency ALTERNATE SWEEP MODE Sweeps alternately in analog or step sweep between any two sweep ranges Each sweep range may be associated with a different power level MANUAL SWEEP MODE Provides stepped phase locked adjustment of frequency between sweep limits User selectable number of steps or step size B 1 PERFORMANCE SPECIFICATIONS 360B VNA SOURCE LOCK MODE Under con
27. 220 GHz rated output power is reduced by 2dB Series 681XXC Synthesized Signal Generator performance specifica tions are provided in Appendix B 1 7 GENERAL INFORMATION 1 9 RECOMMENDED TEST 1 8 EQUIPMENT Table 1 2 Recommended Test Equipment RECOMMENDED TEST EQUIPMENT Table 1 2 lists the recommended test equipment for performing the Se ries 681XXC Synthesized Signal Generator operation verification tests in Chapter 5 Instrument Frequency Counter with Cable Kit and External Mixer Power Meter with Power Sensors Critical Specification Range 0 01 to 65 GHz Input Z 500 Resolution 1 Hz Other External Time Base Input Range 30 to 20 dBm 1 uW to 100 mW Recommended Manufacturer Model EIP Microwave Inc Models 538B 548B or 578B with Cable Kit Option 590 and External Mixer Option 91 26 5 to 40 GHz Option 92 40 to 60 GHz Option 93 60 to 90 GHz Anritsu Model ML2437A or ML2438A with Power Sensors MA2474A 0 01 to 40 GHz MA2475A 0 01 to 50 GHz Oscilloscope Bandwidth DC to 150 MHz Vertical Sensitivity 2 mV division Horiz Sensitivity 50 ns division Tektronix Inc Model TAS485 681XXC OM Chapter 2 Installation Table of Contents 2 4 2 5 2 6 1 1 5 5 Power Requirements
28. 7 dBm dBm 7 dBm dBm 1 dBm dBm 6 dBm dBm 6 dBm dBm 2 dBm dBm 5 dBm 5 dBm dBm 3 dBm dBm 4 dBm dBm 4 dBm dBm 4 dBm dBm 3 dBm dBm 3 dBm dBm 5 dBm dBm 2 dBm dBm 2 dBm dBm 6 dBm dBm 1 dBm dBm 1 dBm dBm 7 dBm dBm 0 dBm 0 dBm dBm 8 dBm dBm 1 dBm dBm 1 dBm dBm 9 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 3 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 40 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 3 dBm dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 01 to 20 GHz 8 2 dB 20 to 40 GHz typical not a specification 5 40 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Level Accuracy Flatness Test Record 23 of 27 Model 68177C Serial No Date Model 68177C without Option 2C Step Attenuator Power Level Accuracy Power Level Accuracy Power Level Accuracy CW Frequency 5 0 GHz CW Frequency 25 0 GHz CW Frequency 45 0 GHz Set Power Measured Power Set Power Measured Power Set Power Measured Power 10 dBm dBm 2 5 dBm dBm 2 5 dBm dBm 9dBm dBm 1 5 dBm dBm 1 5 dBm dBm 8 dBm dBm 4 0 5 dBm dBm 4 0 5 dBm dBm 7 dBm dBm 0 5 dBm dBm 0 5 dBm d
29. A Rear Pand Connectors A 1 INTRODUCTIONS ue Bw ek ea ee ee 1 2 REAR PANEL CONNECTORS xx es 1 A 3 CONNECTOR PINOUT DIAGRAMS 1 Appendix Performance Specifications 681XXC OM 0 01 Table of Contents Continued Chapter 1 General Information Table of Contents 1 1 SCOPE OF MANUAL ws 1 3 1 2 1 3 1 3 DESCRIPTION 1 3 1 4 IDENTIFICATION NUMBER 1 5 1 5 ELECTRONIC MANUAL 25 2 5 aaa do s 1 5 1 6 RELATED MANUALS 1 5 GPIB Programming Manual 1 5 SCPI Programming Manual 1 5 Maintenance Manual 1 6 1 7 OPTIONS wie ed Rem RE Re 1 6 1 8 PERFORMANCE SPECIFICATIONS 1 7 1 9 RECOMMENDED TEST EQUIPMENT 1 7 1 1 Series 681XXC Synthesized Signal Generator 1 1 scope oF MANUAL 1 2 1 3 DESCRIPTION 681XXC OM Chapter 1 General Information This manual provides general information installation and operating information for the Anritsu Series 681XXC Synthesized Signal Gen erator Throughout this manual the terms 681XXC and signal gen erator will be used interchangeably to refer to the instrument Man ual organization is shown in the table of contents This chapter contains general information about the series 681XXC signal generators It includes a general description of the
30. ADRS The new GPIB address 19 will appear on the dis play Press More to gotothe First Additional Configure GPIB menu below At this menu press More to goto the Second Addi tonal Configure GPIB menu below Press 8757D Scalar to enable the 8757D Scalar GPIB mode When enabled the 681XXC will shift to the analog sweep frequency mode sweeping at the full range of the instrument 681XXC OM USE WITH OTHER INSTRUMENTS 681XXC OM Initiating HP8757D SNA Operation USE WITH A HP8757D SCALAR NETWORK ANALYZER Turn ON the HP8757D to initiate scalar network analyzer operation Refer to the Hewlett Packard Model 8757D Scalar Network Analyzer Operation Manual for operating instructions 7 19 7 20 1 2 REAR PANEL CONNECTORS A 3 CONNECTOR PINOUT DIAGRAMS 681XXC OM Appendix A Rear Panel Connectors This appendix provides descriptions for the rear panel connectors on a typical Series 681XXC Synthesized Signal Generator Figure A 1 provides a illustration of the rear panel and describes the rear panel connectors Figures A 2 and A 3 provide pinout diagrams and descriptions for the AUX 1 0 and IEEE 488 GPIB multipin connectors on the rear panel A 1 REAR PANEL CONNECTORS 9 10 MHz REF OUT NCAUTION A WARNING gt FOR CONTINUED FIRE O 18 kg PROTECTION REPLACE ONLY WITH SPECIFIED HEAVYWEIGHT TYPE AND RATED F
31. ANALYZER Step 3 the special AUX 1 0 interface cable Anritsu Part No 806 90 tothe 681XXC rear panel AUX I O connector Connect the cable end having BNC con nectors as follows a Connect the cable end labeled SEQ SYNC tothe HP8757D rear panel POS Z BLANK connector b Connect the cable end labled SWP DWELL IN tothe HP8757D rear panel STOP SWEEP connector c Connect the cable end labled HORIZ OUT to the HP8757D rear panel SWEEP IN 0 10V connector The 681XXC must be set to GPIB address 19 and in the 8757D Scalar mode of operation to operate as a signal sourcefor the SNA Thefollowing paragraphs describe how to set up the 681XXC to enablethe 8757D Scalar GPIB mode On the 681XXC front panel press LINE to place the signal generator in operation Allow the signal generator to warm up then press the EYE main menu key At the System Menu display press Config The System Configuration Menu below is displayed EC F1 2 888 mam B GHz At the System Configuration menu press GPIB The Configure GPIB Menu on the following page is displayed 7 17 USE WITH OTHER INSTRUMENTS 7 18 USE WITH A HP8757D SCALAR NETWORK ANALYZER Config GFIE GPIB Address 5 E GEIB Terminator CRLF Press GPIB Address change the address of the 681XXC on the bus Enter 19 using the cursor con trol key or the data entry keypad and the termina tor key HZ ms
32. FREQUENCY CONTROL The CW Frequency Control Menu below is dis E This menu lets youperform the following Select preset frequencies FO F1 F2 M1 or M2 for output Gotothe frequency list menu to tag edit or output a frequency from the list Gotothe tagged frequencies menu select a tagged frequency for output 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM CW FREQUENCY OPERATION Frequency List To go to the Frequency List Menu below press Freqs List This menu lets you tag edit or output a frequency from the list 3 5 Use the cursor control key to select a frequency from the frequency list The selected frequency is high lighted in reverse video and displayed in full below the frequency list Press to mark a selected frequency place F in front of it If the frequency is already tagged pressing Tag will untag it remove the Tagging selected frequencies lets you quickly switch between them using the scan keys of the Tagged F requencies menu Press Edit to edit the selected frequency or enter a new frequency Press Output Freq to output the selected frequency This frequency is output until you select another frequency from the list and press Output Freq On the frequency list the output frequency selection is marked by a black square or if tagged an F high lighted in reverse video Return to the CW Frequency Control Menu display by pressing Prev
33. GHz connect tothe Band 3 input Connection A For measuring frequencies of 26 5 to 65 0 GHz connect tothe Band 4 input as shown in Connection B using the appropriate waveguide mixer Option 91 26 5 to 40 GHz Option 92 40 to 60 GHz or Option 93 60 to 90 GHz 5 5 OPERATION VERIFICATION 5 6 Test Procedure CW FREQUENCY ACCURACY TEST The following procedure tests both the coarse and fine loops to verify the accuracy of the CW frequency output Step1 Set up the 681XXC as follows a Reset the instrument by pressing then RESET Upon reset the CW Menu below is displayed b Press Edit Fi to open the current fre quency parameter for editing Set 1 tothe first test frequency for the model being tested Table 5 2A is the test record for standard models Table 5 2B for models with Option 11 Step 2 Verify that the Frequency Counter read ing meets specifications 100 Hz of the value shown on the test record for stan dard models 10 Hz for instruments with Option 11 Step 3 Record the Frequency Counter reading the test record Table 5 2A or Table 5 2B NOTE The Frequency Counter reading is typically within 1 Hz Differences of a few Hertz can be caused by noiseor counter limitations Differ ences of 100 Hz 10 Hz for in struments with Option 11 indicate a frequency synthesis problem Step4 SetF1tothe next test frequency on the test record and re
34. Highlighted Frequency sn Output Highlighted Main Menu IODULATIO 2 Power Level Key Cursor c u SYSTEM Preset Parameter Soft Keys Appearance Changes To Show Current Selection Output Next Tagged Frequency Output Previous Tagged Frequency Li 8 08 dBm Edit Current FM Power Level 0 Note In Most Cases Pressing a Menu Soft Key That Controls a Menu Function Turns The Function ON pressing the Key Again Turns The Function OFF The Key Labels Change Appearance to Show the ON OFF Condition Figure 4 1 Sample Menu Map Annotated 681XXC OM 4 5 CW SWEEP SELECT FREQUENCY CONTROL LEVEL LEVEL ALC SELECT CONTROL MODULATION SYSTEM Fi 2 000 000 GOG 8 GHz LOCAL OPERATION MAPS CW FREQUENCY MODE Li 0 00 dBm 055 ERE OF 0 CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL SYSTEM Edit F1 toList Edit Current Frequency Copy Current Frequency and Power to List Index gs Edit Current Power Level Level Li 0 00 dBm 7 gor Erb1e Master Slave Set Slave DF Frequency Set Slave Main Power Level Set Slave Alternate SweepPower Level On Off Press CW to Return to Previous Menu On Off Set The Sweep Time E
35. OPTIONS s scs OE a 1 6 PERFORMANCE SPECIFICATIONS 1 7 RECOMMENDED TEST EQUIPMENT 1 8 Chapter 2 Installation 2 1 2 2 2 3 2 4 2 5 681XXC OM 2 3 INITIAL INSPECTION 424 2 3 56 2 3 PREPARATION FOR USE sss os 2 4 Power Requirements 2 4 Line Voltage 2 4 Power Connection 2 4 Standby Operation 2 5 2 6 Operating Environment 2 6 GPIB SETUPANDINTERCONNECTION 2 7 Interface 2 7 Cable Length Restrictions 2 7 GPIB Interconnection 2 7 Setting the GPIB Address 2 7 Selecting the Line Terminator 2 9 Selecting the Interface Language 2 9 RACK MOUNTING INSTALLATION 2 10 Preliminary 2 10 Procedure 2 10 Table of Contents Continued 2 6 PREPARATION FOR STORAGE SHIPMENT 2 13 Preparation for Storage 2 13 Preparation for Shipment 2 13 Chapter Local Front Pane Operation 3 1 INTRODUCTION 1 2233 3 5 3 2 FRONT PANEL LAYOUT 4 2 s 6 6 daca 3 6 2 eux OR GR OR 3 3 6 Data Display 3 6 3 7 RF Output Contr
36. Power Measured Power 10 dBm dBm 2 5 dBm dBm 2dBm dBm 9dBm dBm 1 5 dBm 1dBm dBm 8 dBm dBm 0 5 dBm dBm 0 dBm dBm 7 dBm dBm 0 5 dBm dBm 1 dBm dBm 6 dBm dBm 1 5 dBm dBm 2 dBm dBm 5 dBm dBm 2 5 dBm dBm 3 dBm dBm 4 dBm dBm 3 5 dBm dBm 4 dBm dBm 3 dBm dBm 4 5 dBm dBm 5 dBm dBm 2dBm dBm 5 5 dBm dBm 6 dBm dBm 1 dBm dBm 6 5 dBm dBm 7 dBm dBm 0 dBm dBm 7 5 dBm dBm 8 dBm dBm 1 dBm dBm 8 5 dBm dBm 9 dBm dBm 2 dBm dBm 9 5 dBm dBm 10 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Specification is 1 5 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 2 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 40 GHz 2 2 dB 40 to 60 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 4 2 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 2 0 dB 0 05 to 20 GHz 4 0 dB 20 to 40 GHz 5 0 dB 40 to 60 GHz typical not a specification 681XXC OM 5 43 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Level Accuracy Flatness Test Record 26 of 27 Model 68187C Serial No Date Model 68187C with Option 2D Step Attenuator Power Level Accuracy Power Level Accuracy Power Level Accuracy CW Frequency 5 0 GHz CW Frequency 25 0 GHz CW Freque
37. The drawings specifications and information contained herein are the property of Anritsu Company and any unauthorized use or disclosure of these drawings specifica tions and information is prohibited they shall not be reproduced copied or used in whole in part as the basis for manufacture or sale of the equipment or software programs without the prior writt ten consent of Anritsu Company DECLARATION OF CONFORMITY Manufacturer s Name ANRITSU COMPANY Manufacturer s Address Microwave Measurements Division 490 Jarvis Drive Morgan Hill CA 95037 2809 USA declares that the product specified below Product Name Synthesized CW Sweep Signal Generator Model Number 690XXB 691XXB 693XXB 680XXC 681XXC 683XXC conforms to the requirement of EMC Directive 89 336 EEC as amended by Council Directive 92 3 amp 93 68 EEC Low Voltage Directive 73 23 EEC as amended by Council directive 93 68 EEC Electromagnetic Interference Emissions CISPR 11 1990 EN55011 1991 Group 1 Class A Immunity EN 61000 4 2 1995 EN50082 1 1997 4kV CD AD EN 61000 4 3 1997 EN50082 1 1997 3V m ENV 50204 EN50082 1 1997 3V m EN 61000 4 4 1995 EN50082 1 1997 0 5kV SL 1kV PL EN 61000 4 5 1995 EN50082 1 1997 1kV L L 2kV L E Electrical Safety Requirement Product Safety IEC 1010 1 1990 AI EN61010 1 1993 E Marcel Dubois Corporate Quali Morgan Hill CA Tan e 99 Date European Contact For An
38. are shown on the menu dis play adjacent to the soft keys 3 11 DATA ENTRY LOCAL FRONT PANEL OPERATION 3 4 DATA ENTRY AREA AREA The value of a selected 681XXC parameter can be changed using the rotary data knob and or keys of the data entry area Each element of the data entry area is identified in Figure 3 3 and described in the fol lowing paragraphs Cursor Control Key Back Space ey Clear Entry Key Terminator Keys GHz dBm MHz ms dB kHz 5 STEPS Hz ns ADRS Rotary Keypad Data Knob Figure 3 3 3 12 Front Pand Data Entry Area Cursor Control Key general this diamond shaped key controls the movement of the cursor on the display When a pa rameter is opened for editing a cursor appears un der the open parameter Each time the lt or gt pad is pressed the cursor moves left or right by one digit The 4 v pad can then be used to increase or de crease the value of the parameter The unit size of the increase or decrease that occurs each time the a or v pad is pressed is determined by the cursor posi tion In addition when editing frequency power level and time parameters the incremental size can be set to a specific value using the system configura tion increment menu paragraph 3 13 Once set and activated each time the or v pad is pressed th
39. bottom of the AM FM status display AM FM will be turned off until the modulating signal is in the input voltage range 6 8 681XXC OM OPERATOR MAINTENANCE ERROR AND WARNING STATUS MESSAGES Table6 3 Possible Warning Status Messages during Normal Operation Warning Status Message Description This warning message indicates that the 100 MHz Crystal oven or the 10 MHz Crystal oven if Option 16 is installed has not reached operating temperature Normally displayed during a cold start of the signal gen erator If the message is displayed during normal operation it could indicate a malfunction Run self test to verify UNLEVELED Displayed when the RF output goes unleveled Normally caused by exceeding the specified leveled power rating Reducing the power level usually clears the warning message If the warning message is displayed only when AM is selected ON the modulating signal may be driving the RF output unleveled Reducing the modulating signal or adjusting the power level usually clears the warning UNLOCKED When Unlocked Narrow FM or Unlocked Wide FM is selected ON this warning message appears indicating that the instrument is not phase locked during this FM mode of operation This status message indicates that an external 10 MHz signal is being used as the reference signal for the 681XXC This status message indicates that a constant offset has been applied to the display
40. by pressing More The first Addi tional Configure GPIB Menu below is displayed Config GPIB Fur Meter Address 15 Pur Meter Press Native SCPI to select the external interface language to be used This menu soft key toggles the language selection between Native and SCPI The current selection appears on the display 2 9 RACK MOUNTING KIT INSTALLATION INSTALLATION 2 5 RACK MOUNTING KIT The rack mounting kit Option 1 contains a set of track slides 90 tilt INSTALLATION capability mounting ears and front panel handles for mounting the signal generator in a standard equipment rack The following proce dure provides instructions for installing the rack mounting hardware on to the instrument Refer to Figures 2 2 and 2 3 during this proce dure Preliminary Disconnect the power cord and any other cables from the instrument Procedure Install the rack mounting hardware as follows 1 Using a Phillips screwdriver remove the screws and the front handle assemblies from the instrument F or instruments not having front handles remove the screws and the front top and bottom feet from the instrument Retain the screws Step 2 Removethe four feet from the rear of the instrument Retain the screws Step 3 Removethescrews and the carrying han dle from the side handle cover The two screws fastening the carrying handle through the side handle cover to the chas sis are accessable by li
41. derived from the internal frequency standard of the signal generator BNC connector 509 impedance AM IN Accepts an external modulating signal to produce AM on the RF output AM sensitivity linear or log and input impedance 509 or 6009 are selectable via front panel menu or GPIB BNC connector FM IN Accepts an external modulating signal to produce FM on the RF output FM sensitivity and input impedance 502 or 6009 are selectable via front panel menu or GPIB BNC connector F Lj IN Accepts an external TTL level signal to square wave pulse modulate the RF output BNC connector EXT ALC IN Provides for leveling the RF output signal externally with either a remote detector or a power meter Connector accepts a positive or negative 0 5 500 mV signal from a remote detector or a 1V signal from a remote power meter BNC connector Line Fuse Provides over voltage current protection for signal generator circuits during operation and standby Unit requires a 5A type T fuse for 110 Vac line voltage or a 2 5A type T fuse for 220 Vac line voltage O OCG OOO LINE SELECT Switch Provides selection of 110 or 220 Vac line voltages When 110 Vac is selected the 681XXC accepts 90 132 Vac 48 440 Hz line voltage when 220 Vac is selected the 681XXC accepts 180 264 Vac 48 440 Hz line voltage 1 Input Line Voltage Receptacle Provides for connecting line voltage to the 681 XXC signal generator IEEE 488 GPIB 24 pin connector that
42. first press RASHA At the System Menu display press Config The System Configuration Menu below is displayed F1 2 48 GEE mam GHz Fear Panel Li 0 00 STE This menu lets you go to the Front Panel Rear Panel RF GPIB and Increment Configuration menus 3 80 681XXC OM LOCAL FRONT PANEL OPERATION Configuring the Front Panel 681XXC OM SYSTEM CONFIGURATION Configuring the front panel of the signal generator involves adjusting the intensity level of the data dis play for ease of viewing To goto the Configure F ront Panel menu from the System Configuration menu press Front Panel The Configure F ront Panel Menu below is dis played Press Brite repeatedly to increase the intensity of the data display tothe desired level Press Dim repeatedly to decrease the intensity of the data display Press Previous Menu to return to the System Con figuration Menu display 3 81 LOCAL FRONT PANEL OPERATION Configuring the Rear Panel 3 82 SYSTEM CONFIGURATION Configuring the rear panel of the signal generator consists of selecting the polarity of the retrace blanking bandswitch blanking retrace penlift and video marker outputs To goto the Configure Rear Panel menu from the System Configuration menu press Rear Panel The Rear Panel Menu below is displayed Config Rear Panel Blanking Penlift Neo __ Harker Fol Pres
43. four preset sweep range parameters se lectable in the analog sweep step sweep and man ual sweep frequency modes The following is a description of each preset sweep range F1 F2 provides a frequency sweep between the start frequency 1 and the stop frequency F 2 F3 F4 provides a frequency sweep between the start frequency F3 and the stop frequency F 4 F5 dF provides a symmetrical frequency sweep about the center frequency F5 The sweep width is determined by the dF frequency parameter Q F6 dF provides a symmetrical frequency sweep about the center frequency F6 The sweep width is determined by the dF frequency parameter To select one of the preset sweep ranges from any sweep frequency mode menu press the main menu key FREQUENCY CONTROL The Sweep Frequency Control Menu below is dis played This menu lets you perform the following a Select a full range sweep F min F max or one of the preset sweep ranges for the sweep fre quency mode Select the frequency parameters for each pre set sweep range Select an output power level for the sweep Gotothe marker list menu analog and step sweep frequency modes only 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM Selecting a Power Level SWEEP FREQUENCY OPERATION Setting a Preset Sweep Range At the menu se lect the sweep range F1 F2 F3 F4 F5 dF or F6 dF that you wish to set The menu then displays the current
44. frequency parameters for the selected sweep range Now use the menu edit soft keys to open the frequency parameters for editing Edit the current frequency parameters or enter new frequency parameter values for the sweep range To close the open frequency parameter when you are finished press its menu edit soft key or make an other menu selection You can set all the preset sweep ranges in this man ner Whilein a sweep frequency mode you can edit the current output power level or enter a new output power level for the frequency sweep Editing the Current Power Level Press Edit L1 to open the power level parameter then edit the current power level using the cursor control key or rotary data knob To close the open power level parameter press Edit L1 or make an other menu selection Entering a New Power Level Press Edit L1 to open the power level parameter then enter the new power level using the keypad and appropriate terminator key To close the open power level parameter press Edit L1 or make an other menu selection NOTE You can also select any of the preset power levels for a frequency sweep or a power level step for analog and step sweeps For instructions refer to para graphs 3 9 Fixed Power Level Operation and 3 10 Power Level Sweep Operation 3 35 LOCAL FRONT PANEL OPERATION 3 36 Frequency Markers SWEEP FREQUENCY OPERATION The signal generator provides up to 20 independent pre s
45. from the System Con figuration menu press Incr Menu The Increment Menu below is displayed Press Freq Incr to open the frequency increment parameter Press Level Incr to open the power level increment parameter Press Time Incr to open the time increment parameter Open the parameter you wish to change then edit the current value using the cursor control key or rotary data knob or enter a new value using the key pad and appropriate termination key When you have finished setting the open parameter close it by pressing its menu soft key or by making another menu selection Press Incr Mode toturn the increment mode on Press again to turn it off When done press Previous Menu to return tothe System Configuration Menu display 681XXC OM SAVING RECALLING LOCAL FRONT PANEL OPERATION INSTRUMENT SETUPS 3 14 SAVING RECALLING INSTRUMENT SETUPS The 681XXC offers the capability to store up to ten complete front panel setups The setups are numbered through 9 The following paragraphs describe how to save and recall front panel setups Saving Setups Recalling Setups Once you have decided that an instrument setup should be retained for future use follow the proce dure below to save it First press 91 to display the System M enu Now press Setups The Setups Menu below is dis played Leu 81 dBm Secure Press Save then enter the desired setup number
46. generator operations namely frequency and frequency sweep power level and power sweep signal modulation saving and recalling instrument setups and system configuration 3 5 LOCAL FRONT FRONT PANEL PANEL OPERATION LAYOUT 3 2 FRONT PANEL LAYOUT The 681XXC front panel is divided into two main areas the data dis play area and the data entry area The following paragraphs provide a brief description of the front panel controls inputs outputs and data display and data entry areas as shown in Figure 3 1 Detailed descrip tions of the data display and data entry areas are contained in para graphs 3 3 and 3 4 RE Output Control Data Display Data Entry Key Space Generator T s s 4 kHz 27 1 2 3 11 Modulati External 5 lodulation External NE ll _ CAU ION S andby RF Oi put May Excee 100 Line Menu Modulation External RF Output Key Keys Connectors ALC Connector Connector Figure3 1 Front Pand 681XXC Synthesized Signal Generator Line Key The line key provides for turning the signal genera tor on and off STANDBY off is indicated by an or ange LED OPERATE on by a green LED Data Display The data display area consists of the data disp
47. instrument to local front panel control 7 9 USE WITH USE WITH A 56100A SCALAR OTHER INSTRUMENTS NETWORK ANALYZER 7 3 USE WITH A 56100A The 681XXC is directly compatible with the Anritsu Model 56100A SCALAR NETWORK Scalar Network Analyzer SNA The following paragraphs provide ANALYZER instructions for connecting the signal generator to the 56100A SNA so that is can be used as a signal source for the analyzer Operating in structions for the network analyzer can be found in the Model 56100A Scalar Network Analyzer Operation Manual P N 10410 00193 56100A SCALAR NETWORK ANALYZER DEDICATED GPIB AUX I O ig e d AUX a EN p o IEEE 488GPIB DDD al 681XXC SIGNAL GENERATOR DETECTOR Figure 7 2 56100A SNA to 681XXC Signal Generator Connections Connecting Connect the 681XXC signal generator to the 56100A the681XXC to Scalar Network Analyzer as shown in Figure 7 2 the 56100A 1 Connectone end of the Auxiliary I O ca ble P N 806 7 to the 56100A rear panel s 2 2 2 AUX I O connector Connect the other end oe esate of the cable to the 681XXC rear panel ting for operation with a 56100 AUX I O connector SNA To verify or change the GPIB 2 dii Step2 Connect one end of the dedicated system bus cable
48. is switched off in units with a step attenua tor Option 2 installed To goto the Configure RF Menu below from the em Configuration menu press HF T Dr Eie Confia RF aL Retrace RF poi nelta F RF Ramp Rezt Press Retrace to select RF On or Off during retrace The display will reflect your selection Press Delta F to select RF On or Off during fre quency switching in CW step sweep and list sweep modes The display will reflect your selection Press Ramp Rest to select or 10 for the ramp rest point for sweeps triggered a single or external trig ger 0 indicates that the sweep will rest at the bot tom of the sweep ramp 10 indicates that the sweep will rest at the top of the sweep ramp The display will reflect your selection Press More to gotothe additional Configure RF menu for more selections Press Previous Menu to return to the System Con figuration Menu display 681XXC OM 3 83 LOCAL FRONT PANEL OPERATION Resetting the 681 sets the fre quency scaling reference multipler tol i The Term RF Off selection is only available in those 681XXC models having Option 2andFirmware Ver sion 1 01 and above i 3 84 SYSTEM CONFIGURATION Additional Configure RF Menu When you press More the Additional Configure RF Menu below is displayed Press Reset State to select RF On or Off at reset The display will reflect your selection Frequen
49. list and the signal gen erator has been checked for mechanical and electrical operation If the shipment is incomplete or if the signal generator is damaged mechanically or electrically notify your local sales representative or Anritsu Customer Service If either the shipping container is damaged or the cushioning material shows signs of stress notify the carrier as well as Anritsu Keep the shipping materials for the carrier s inspec tion 2 3 PREPARATION INSTALLATION 2 3 PREPARATION FOR USE FOR USE Preparation for use consists of checking that the rear panel line volt age selector switch is set for the correct line voltage and connecting the signal generator to the power source The following paragraphs provide these procedures along with information about power require ments warmup times and the operating environment Power Requirements signal generator accepts 90 to 132 Vac and 180 to 264 Vac 48 to 440 Hz single phase power Power consumption is 400 VA maximum The signal gen erator is intended for Installation Category Over voltage Category 1 CAUTION Before applying power verify that the unit is set to match the available line voltage and that the installed fuse is of the correct type and rating Line Voltage Selection The line voltage selector switch on the rear panel can be set for either 110 Vac or 220 Vac operation Figure 2 1 When the switch is set to 110 Vac t
50. menu key FREQUENCY CONTROL The Sweep Frequency Control Menu below is displayed d Press Full to select a full range fre quency sweep e Press Edit L1 to open the current power level parameter for editing f Set L1 tothe power level noted on the test record g Now return to the Analog Sweep menu by pressing the main menu key CW SWEEP SELECT 681XXC OM 5 17 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS h At the Analog Sweep menu press the menu soft key Sweep Ramp to goto the Analog Sweep Ramp Menu i Press Sweep Time to open the sweep time parameter for editing j Set the sweep time to 99 seconds NOTE Monitor the 681XXC s Horizontal Output on the Oscilloscope to de termine sweep start and stop Step 4 During the analog sweep measure the maximum and minimum Power M eter readings and record the values on the test record Verify that the variation differ ence between the maximum and mini mum readings does not exceed the value noted on the test record 5 18 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Leve Accuracy and Flatness Test Record 1 of 27 Model 68117C Serial No Date Model 68117C without Option 2 Step Attenuator Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 13 dBm dBm 13 dBm dBm 12 dBm dBm 12 dB
51. on trace obtained by momentary dwell in RF sweep Marker Accuracy Same as sweep frequency accuracy Marker Resolution Analog Sweep 1 MHz or Sweep Width 4096 whichever is greater Marker Resolution Step Sweep 1 kHz 0 1 Hz with Option 11 SWEEP TRIGGERING Sweep triggering is provided for Analog Frequency Sweep Step Frequency Sweep List Frequency Sweep and CW Power Sweep Auto Triggers sweep automatically External Triggers a sweep on the low to high transition of an external TTL signal AUX I O connector rear panel Single Triggers aborts and resets a single sweep Reset sweep may be selected to be at the top or bottom of the sweep The pen lift will activate at sweep times 1 second B 2 SPECTRAL PURITY All specifications apply to the phase locked CW and Step Sweep modes at the lesser of 10 dBm output or maxi mum specified leveled output power unless otherwise noted SPURIOUS SIGNALS Harmonic and Harmonic Related 0 1 Hz to 10 MHz Option 22 lt 30 dBc 10 MHz to lt 50 MHz lt 30 dBc gt 50 MHz to lt 2 GHz lt 40 dBc gt 2 GHz to lt 20 GHz lt 60 dBc gt 20 GHz to lt 40 GHz lt 40 dBc Harmonic and Harmonic Related Models having a high end frequency of gt 40 GHz and units with Option 15A at maximum specified leveled output power 10 MHz to lt 50 MHz lt 30 dBc gt 50 MHz to lt 2 GHz lt 40 dBc gt 2 GHz to lt 20 GHz lt 50 dBc gt 20 GHz to lt 40 GHz lt 40 dBc 50 GHz u
52. opening either the start or stop power level parame ters press Edit L1 or Edit L2 Enter a new power level using the keypad and ap propriate terminator key When you are finished dose the open parameter by pressing its menu edit soft key or by making another menu selection 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM POWER LEVEL SWEEP OPERATION Selecting a Preset Power Level Sweep Range There are five preset power level sweep range pa rameters selectable in the power level sweep modes These preset power level sweep range parameters areL1 L2 L3 L4 L5 L6 L7 L8 and L9 LO To select one of the preset power level sweep ranges from a Level Sweep menu press the main menu key LEVEL CONTROL In addition to letting you select one of the preset sweep ranges for the power level sweep this menu lets you select logarithmic or linear power level sweep and set the start and stop power level pa rameters for each preset sweep range Setting a Preset Power Level Sweep Range At the Level Sweep Control menu select the power level sweep range L1 L2 L3 L4 L5 L6 L7 L8 or 19 10 that you wish to set The menu then displays the current power level parameters for the selected power level sweep range Now use the menu edit soft keys to open the power level parameters for ed iting Edit the current power level parameter values or enter new power level parameter values for the power level sweep range To close the o
53. provides for remotely controlling the signal generator from an external controller via the IEEE 488 bus GPIB A pinout diagram for this connector is shown in Figure 3 SERIAL I O Provides access to two RS 232 terminal ports to support service and calibration functions and master slave operations RJ45 connector FigureA 1 Rear Pand Series 681XXC Synthesized Signal Generator 2 of 2 681XXC OM A 3 REAR PANEL CONNECTOR CONNECTORS PINOUT DIAGRAMS AUX 1 0 PIN SIGNAL NAME SIGNAL DESCRIPTION HORIZ OUTPUT Horizontal Sweep Output Provides a OV at beginning and 10V at end of sweep for all sweep modes regardless of sweep width In the CW mode the voltage is proportional to frequency between OV at low end and 10V at the high end of range In CW mode if CW Ramp is enabled a repetitive OV to 10V ramp is pro vided The ramp speed is adjusted by the Sweep Time function 2 GND Chassis Ground Sequential Sync Output Provides a 5V signal during sweep retrace at band 3 SEQ SYNC switching points and during each frequency step in step sweep mode 5V during markers and 10V during the selected marker 4 L ALT ENABLE L Alternate Enable Output Provides a TTL low level signal which indicates that the alternate sweep mode is active 5 MARKER OUTPUT Marker Output Provides a 5V or 5V signal during a marker Signal polarity se lected from a front panel menu 6 RETRACE BLANKING Retrace Blanking Outpu
54. recommended test equipment for performing the operation verification tests in this chapter Table5 1 Recommended Test E qui pment TNT Recommended Instrument Critical Specification Manufacturer Model Frequency Range 0 01 to 65 GHz EIP Microwave Inc Models 538B Counter Input Z 509 548B or 578B with Resolution 1 Hz with Cable Kit Other External Time Base Cable Kit Option 590 and Input and External Mixer External Mixer Option 91 26 5 to 40 GHz Option 92 40 to 60 GHz Option 93 60 to 90 GHz Power Meter Range 30 to 20 dBm Anritsu Model ML2437A or ML2438A with 1uW to 100 mW with Power Power Sensors Sensors MA2474A 0 01 to 40 GHz MA2475A 0 01 to 50 GHz Oscilloscope Bandwidth DC to 150 MHz Tektronix Inc Model TAS485 Vertical Sensitivity 2 mV division Horiz Sensitivity 50 ns division Tables 5 2 and 5 3 contain test record forms that can be photocopied and used to record the results of operational verification testing of your 681XXC These tables are included as part of the operational verification test procedures and contain test information for all 681XXC models 5 3 OPERATION VERIFICATION 5 4 INITIAL 681xxc CHECKOUT INITIAL 681XXC CHECKOUT Before starting the operation verification tests in this chapter perform an initial checkout of the 681XXC to be tested This initial checkout consists of applying power to the signal generator verifying that it passes self t
55. source lock mode for operation with a Model 360B Vector Network Analyzer Select the model and set the GPIB address for the power meter used to create a user level flatness correction power offset table Select the external interface language for re mote operation of units with Option 19 Select scalar mode of operation with a Hewlett Packard Model 8757D Scalar Network Ana lyzer To goto the Configure GPIB menu from the System Configuration menu press GPIB The Configure GPIB Menu below is displayed ___ GPIE Terminator CRLF Lee Config GPIB Address 55 Mode Press GPIB Address to change the address of the 681XXC on the bus the signal generator s default GPIB address is 5 Enter a new address between 1 and 30 using the cursor control key or the data en try keypad and the terminator key Hz ns ADRS The new GPIB address will appear on the display Press Line Term to select a carriage return CR or a carriage return and line feed CR LF as the GPIB data delimiter Consult the GPIB controller s man ual to determine which data delimiter is required 681XXC OM 3 85 LOCAL FRONT PANEL OPERATION When SS Mode is selected on this message is displayed in the fre quency mode title bar on all menu displays to remind the operator that the 681XXC is in a source lock mode 3 86 SYSTEM CONFIGURATION Press SS Mode to place the signal generator
56. step size does not divide into the frequency range the last step is truncated In logarithmic step sweep step size increases loga rithmically with frequency and is determined by a logarithmic curve fitted between the sweep start and stop frequencies and the number of steps The number of steps range is 1 to 10 000 The dwell time per step of the step sweep can be set for any time in the range of 1 ms to 99 sec When dwell ti me per step and step size or number of steps is set the sweep time equals dwell time per step times the number of steps plus the total phase locking time for all step frequencies If sweep time is set then dwell time per step is the result of the sweep time divided by the number of steps In this case the resultant minimum dwell time must be gt 10 ms to allow for phase locking of each step fre quency The sweep time of the step sweep can be set for any time in the range of 20 ms to 99 sec To goto the Step Sweep Ramp menu below from the Step Sweep menu press Sweep Ramp This menu lets you set the dwell time the step size in linear step sweep the number of steps and goto the additional step sweep ramp menu to set the sweep time select log or linear sweep and select a sweep trigger Press Dwell Time to open the dwell time per step parameter Press Step Size to open the step size parameter Press of Steps to open the number of steps parameter 681XXC OM SWEEP FREQUENCY PANEL O
57. sweep CAUTION Performing alternate sweeps using power levels that cross Step attenuator switch points can cause excessive wear on the switches and reducethe life expectancy of the step attenuator When you are done selecting the power level for the alternate sweep range and editing the power level of the main sweep press Previous Menu to return to the Alternate Sweep Menu display 3 40 681XXC OM LOCAL FRONT SWEEP FREQUENCY PANEL OPERATION OPERATION List Sweep In list sweep frequency mode the output is a step Mode sweep of up to 2000 phase locked non sequential frequencies Each frequency can have a different power level setting The list index 0 thru 1999 identifies each frequency power level set in the list The list sweep is defined by a list start index anda list stop index There are four modes of sweep triggering in list sweep automatic external single and manual When automatic external or single trigger mode is selected the output sweeps between the specified list start and stop indexes dwelling at each list in dex for the specified dwell time When manual trig ger mode is selected the list start index list stop index and dwell time parameter are not used In stead the list index is incremented or decremented by using the front panel cursor control key man ual trigger mode the list index can also be incre mented by using an external trigger input Each TTL trigger inc
58. the 681XXC toa Anritsu Model 360B Vector Network Analyzer and configuring the signal generator so that it can be used as a signal source for the analyzer Q Instructions for connecting the 681XXC to a Hewlett Packard Model 8757D Scalar Network Analyzer and setting up the signal generator so that it can be used as a signal source for the ana lyzer 7 3 USE WITH OTHER INSTRUMENTS 7 2 MASTER SLAVE OPERATION MASTER SLAVE OPERATION Master slave operation consists of connecting any two 68XXXC and or 68XXXB instruments together and configuring them so that they pro duce CW and synchronized swept output signals at an operator selectable frequency offset One instrument the Master controls the other the Slave via interface cables between their rear panel AUX and SERIAL I O connectors The two units are phase locked together by connecting them to the same 10 MHz reference time base SERIAL 10 MHz 10 MHz I O REF OUT REF IN E zi mam H IN NM zc RF C maa RF OUTPUT oureur 68XXXB C Master 68XXXB C Slave TO DUT TO DUT Figure 7 1 68XXXB 68XXXC Configuration for Master Slave Operation Connecting Connect the two instruments shown in Figure 7 1 the Instru a
59. the Analog Sweep Menu display if operating in analog sweep frequency mode Notice the changes to the Step Sweep Menu display below These changes indicate that the alternate sweep frequency mode is active _ Li AM Now press Alt Swp Menu to return to the Alternate Sweep Menu display Selecting an Alternate Sweep Range To go to the Alternate Range M enu below from the Alternate Sweep menu press Alt Range EStep Sweep j Puto Fi 2 088 GHz F3 2 000 GHz 26 888 F455 BBE HEZUJ EE Select the alternate sweep range Full F1 F2 F3 F4 F5 dF or F6 dF The menu then displays the cur rent frequency parameters for the selected sweep range If you wish to change a frequency parameter use the menu edit soft key to open the parameter then edit it 3 39 LOCAL FRONT SWEEP FREQUENCY PANEL OPERATION OPERATION When you are done selecting the alternate sweep range press Previous Menu to return tothe Alter nate Sweep Menu display Selecting an Alternate Sweep Power L evel To goto the Alternate Level Menu below from the Alternate m menu press Alt Level Select the power level for the alternate sweep range LO L1 L2 L3 or L4 The menu then displays the current level parameter for the selected power level If you wish to change the level use the menu edit soft key to open the parameter then edit it A menu edit soft key is also provided to let you change the power level of the main
60. the internal source then when you press More the menu shown below is displayed Use the cursor control key to chose the desired modulating signal frequency then press Select to enter the selection into memory The Square Wave status display will reflect your selection Press Previous Menu to return tothe initial Square Wave Status Menu display 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM SIGNAL MODULATION External Source Input Connector Selection If you have selected External to use a modulating signal from an external source then when you press More the menu below is displayed Polarity Source Press Front Rear to select the front or rear panel connector The Square Wave status display shows your selection as Source Press Previous Menu to return tothe initial Square Wave Status Menu display 3 79 LOCAL FRONT SYSTEM PANEL OPERATION CONFIGURATION 3 13 SYSTEM The system configuration function provides menus that let you set or CONFIGURATION select instrument configuration items for example display intensity polarity of blanking and video marker outputs RF on or off during re trace or between steps frequency scaling GPIB operating parameters external interface language and increment sizes for frequency power level and time parameters Use the System Configuration menu map Chapter 4 Figure 4 14 to follow the menu sequences To go to the System Configuration menu
61. the marker list The selected fre quency parameter is highlighted in reverse video and displayed in full below the marker list Editing a Marker List Frequency If you want to change a selected marker list fre quency parameter 5 value press Edit to open the frequency parameter then edit the current fre quency or enter a new frequency Tagging a Marker List Frequency Only frequencies on the marker list that have been tagged can be output as markers during a sweep Press to tag a selected frequency parameter place an m in front of it If a frequency parameter is already tagged pressing Tag will untag it re move the m Activating Markers The soft keys Video Markers and Intensity Markers toggle the markers on and off Video Markers To output the tagged marker fre quendies as video markers during an analog or step sweep press Video Markers Video markers will be displayed on the CRT for all tagged marker frequen cies that are within the sweep frequency range Intensity Markers onl y availablein analog sweep frequency mode To output the tagged marker fre quencies as intensity markers during an analog sweep press Intensity Markers Intensity markers will be displayed on the CRT for all tagged marker frequencies that are within the analog sweep fre quency range Press Previous Menu to return to the Sweep Fre quency Control Menu display 3 37 LOCAL FRONT PANEL OPERATION Selecting Alternate Sweep M
62. there is a risk of receiving a severe or fatal electric shock WARNING Before changing the fuse always remove the power cord from the power outlet Thereis therisk of receiving a fatal electric shock if the fuse is replaced with the power cord connected Always use a new fuse of the type and rating specified by the fuse markings on the rear panel of the instrument There are no operator serviceable components inside Refer servicing of the instrument to qualified service technicians To prevent the risk of electrical shock or damage to precision components do not remove the equipment covers WARNING Usetwo or more peopleto lift and move this equi pment or use an equipment cart Thereis a risk of back injury if this equipment is lifted by one person WARNING If the equipment is used in a manner not specified by the manufacturer the protection provided by the equi pment may be impaired 681XXC OM Table of Contents Chapter 1 General Information 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 SCOPE OF MANUAL 6 55 dma 1 3 INTRODUCTION 3 x ud aed 8 owe a 1 3 DESCRIPTION 4 uum 34 waves Y Go v 3 iss 1 3 IDENTIFICATION NUMBER 1 5 ELECTRONIC MANUAL 1 5 RELATED MANUALS 1 5 GPIB Programming Manual 1 5 SCPI Programming Manual 1 5 Maintenance Manual 1 6
63. variable from 0 per volt to 100 per volt AM Depth typical 0 90 linear 20 dB log AM Bandwidth 3 dB DC to 50 kHz minimum DC to 100 kHz typical Flatness DC to 10 kHz rates 0 3 dB Accuracy 5 Distortion lt 5 typical Incidential Phase Modulation 30 depth 10 kHz rate 0 2 radians Maximum Input 1V B 6 FREQUENCY MODULATION External FM Input Front or rear panel BNC 509 or 6009 input impedance All options selectable from modulation menu FM Sensitivity Continuously variable from 10 kHz per volt to x20 MHz per volt Locked or Unlocked Narrow FM modes or 100 kHz per volt to x100 MHz per volt Un locked Wide FM mode selectable from modulation menu Maximum FM Deviation Locked Mode 1 kHz to 500 kHz rates The lesser of x10 MHz or rate x 300 Unlocked Narrow Mode DC to 500 kHz rates 10 MHz Unlocked Wide Mode DC to 100 Hz rates 100 MHz FM Bandwidth 3 dB Locked Mode 1 kHz to 500 kHz Unlocked Narrow Mode DC to 500 kHz Unlocked Wide Mode DC to 100 Hz Flatness 10 kHz to 500 kHz rates 1 dB Accuracy 100 kHz rate 1V input 10 5 typical Maximum Input 1V SQUARE WAVE MODULATION The RF output can be pulse modulated via an external modulating signal or an internal square wave generator On Off Ratio gt 50 dB Rise Fall Time lt 1 us typical Internal Square Wave Generator Four square wave sig nals 400 Hz 1 kHz 7 8125 kHz and 27 8 kHz selectable from modulation menu
64. 0 5 0 8 0 11 0 114 0 17 0 20 0 3 5 2 0 20 0 2 0 5 0 8 0 11 0 14 0 17 0 20 0 1 0 68167 3 5 2 0 40 0 2 0 5 0 8 0 11 0 114 0 17 0 20 0 3 5 2 0 40 0 2 0 5 0 8 0 11 0 14 0 17 0 20 0 1 0 68177 3 5 2 0 50 0 2 0 5 0 8 0 11 0114 0 17 0 20 0 3 5 2 0 50 0 2 0 5 0 8 0 11 0 14 0 17 0 20 0 1 0 68187 3 5 2 0 60 0 2 0 5 0 8 0 11 0 114 0 17 0 20 0 3 5 2 0 60 0 2 0 5 0 8 0 11 0 14 0 17 0 20 0 1 0 68197 3 5 2 0 65 0 2 0 5 0 8 0 11 0114 0 17 0 20 0 3 5 2 0 65 0 2 0 5 0 8 0 11 0 14 0 17 0 20 0 1 0 681 POWER LEVEL PARAMETERS dBm MODEL NUMBER LO L1 L2 L3 L4 L5 L6 L7 L8 L9 68117C 1 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 68137 1 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 68147 1 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 68167 1 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 68177 1 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 68187 1 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 68197 1 0 0 0 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 3 16 681 LOCAL FRONT RESET DEFAULT PANEL OPERATION PARAMETERS Table 3 1 Reset Default Paramenters 2 of 2 STEP SWEEP LEVEL SWEEP EE SWEEP LEVEL TIME NUMBER OF NUMBER OF OFFSET NUMBER DWELL TIME ST
65. 0 0 6 000 000 000 0 10 000 000 000 0 10 000 000 000 0 14 000 000 000 0 14 000 000 000 0 18 000 000 000 0 18 000 000 000 0 22 000 000 000 0 22 000 000 000 0 26 000 000 000 0 26 000 000 000 0 30 000 000 000 0 30 000 000 000 0 34 000 000 000 0 34 000 000 000 0 38 000 000 000 0 38 000 000 000 0 42 000 000 000 0 42 000 000 000 0 46 000 000 000 0 46 000 000 000 0 50 000 000 000 0 50 000 000 000 0 54 000 000 000 0 54 000 000 000 0 58 000 000 000 0 58 000 000 000 0 60 000 000 000 0 62 000 000 000 0 65 000 000 000 0 2 000 000 100 0 2 000 000 100 0 2 000 000 200 0 2 000 000 200 0 2 000 000 300 0 2 000 000 300 0 2 000 000 400 0 2 000 000 400 0 2 000 000 500 0 2 000 000 500 0 2 000 000 600 0 2 000 000 600 0 2 000 000 700 0 2 000 000 700 0 2 000 000 800 0 2 000 000 800 0 2 000 000 900 0 2 000 000 900 0 2 000 001 000 0 2 000 001 000 0 5 12 681 OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS 5 6 POWER LEVEL These tests verify that the power level accuracy and flatness of the ACCURACY AND 681XXC meet specifications Table 5 3 beginning on page 5 19 con FLATNESS TESTS tains test records that you can copy and use to record test results for these tests Test records are provided for each 681XXC model configu ration 681XXC SIGNAL GENERATOR OSCILLOSCOPE HORIZ cess O
66. 00 000 65 000 000 000 2 000 001 000 2 000 001 000 2 000 002 000 2 000 002 000 2 000 003 000 2 000 003 000 2 000 004 000 2 000 004 000 2 000 005 000 2 000 005 000 2 000 006 000 2 000 006 000 2 000 007 000 2 000 007 000 2 000 008 000 2 000 008 000 2 000 009 000 2 000 009 000 2 000 010 000 2 000 010 000 681 OM 5 9 OPERATION CW FREQUENCY VERIFICATION ACCURACY TEST Table 5 28 CW Frequency Accuracy Test Record for Models with Option 11 1 of 3 Model 681 __ Serial Date Specification for all frequencies listed above is 100 Hz All frequencies are in GHz 68117C 68137C 68147C 1 000 000 000 0 2 000 000 000 0 2 000 000 000 0 5 000 000 000 0 4 000 000 000 0 8 000 000 000 0 6 000 000 000 0 11 000 000 000 0 8 000 000 000 0 14 000 000 000 0 17 000 000 000 0 20 000 000 000 0 2 000 000 100 0 2 000 000 100 0 2 000 000 200 0 2 000 000 200 0 2 000 000 300 0 2 000 000 300 0 2 000 000 400 0 2 000 000 4000 2 000 000 500 0 2 000 000 500 0 2 000 000 600 0 2 000 000 600 0 2 000 000 700 0 2 000 000 700 0 2 000 000 800 0 2 000 000 800 0 2 000 000 900 0 2 000 000 900 0 2 000 001 000 0 2 000 001 000 0 5 10 681XXC OM OPERATION CW FREQUENCY VERIFICATION ACCURACY TEST Figure 5 2B CW Frequen
67. 00 series signal sources When emu lating another signal source the instrument will be limited to the capabilities mnemonics and parameter resolutions of the emulated instrument 681XXC OM GENERAL Stored Setups Stores front panel settings and nine addi tional front panel setups in a non volatile RAM A system menu allows saving and recalling of instrument setups Whenever the instrument is turned on control settings come on at the same functions and values existing when the instrument was turned off Memory Sequencing Input Accepts a TTL low level sig nal to sequence through nine stored setups AUX I O con nector rear panel Self Test Instrument self test is performed when Selftest Soft key is selected If an error is detected an error mes sage is displayed in a window on the LCD identifying the probable cause and remedy Secure Mode Disables all frequency power level and modulation state displays Stored setups saved in secure mode remain secured when recalled Mode selectable from a system menu and via GPIB Parameter Entry Instrument controlled parameters can be entered in three ways keypad rotary data knob or the and v touch pads of the cursor control key The keypad is used to enter new parameter values the rotary data knob and the cursor control key are used to edit existing parameter values The and touch pads of the cursor control key move the cursor left and right one digit under the open parameter T
68. 000 17 000 000 000 22 000 000 000 20 000 000 000 26 000 000 000 23 000 000 000 30 000 000 000 26 000 000 000 34 000 000 000 29 000 000 000 38 000 000 000 32 000 000 000 42 000 000 000 35 000 000 000 46 000 000 000 38 000 000 000 50 000 000 000 40 000 000 000 2 000 001 000 2 000 001 000 2 000 002 000 2 000 002 000 2 000 003 000 2 000 003 000 2 000 004 000 2 000 004 000 2 000 005 000 2 000 005 000 2 000 006 000 2 000 006 000 2 000 007 000 2 000 007 000 2 000 008 000 2 000 008 000 2 000 009 000 2 000 009 000 2 000 010 000 2 000 010 000 Specification for all frequencies listed above is 100 Hz All frequencies are in GHz 5 8 681 OPERATION CW FREQUENCY VERIFICATION ACCURACY TEST Table 5 2A CW Frequency Accuracy Test Record for Standard Modds 3 of 3 Model681 __ Serial No Date 68187C 68197C 2 000 000 000 2 000 000 000 6 000 000 000 6 000 000 000 10 000 000 000 10 000 000 000 14 000 000 000 14 000 000 000 18 000 000 000 18 000 000 000 22 000 000 000 22 000 000 000 26 000 000 000 26 000 000 000 30 000 000 000 30 000 000 000 34 000 000 000 34 000 000 000 38 000 000 000 38 000 000 000 42 000 000 000 42 000 000 000 46 000 000 000 46 000 000 000 50 000 000 000 50 000 000 000 54 000 000 000 54 000 000 000 58 000 000 000 58 000 000 000 60 000 000 000 62 000 0
69. 15 Specifications Performance B 1 Square Wave Modulation Mode Menu Map 4 17 681XXC OM SUBJECT INDEX Operating Modes 3 77 Providing Square Wave Modulation 3 77 SS Mode Operation 7 12 Start Up 3 14 Start Up Display 3 14 Step Sweep Frequency Mode Menu Map 4 8 Sweep F requency Step Power Mode Menu Map 4 13 Selecting a Sweep Frequency Step Power Mode 3 58 Selecting a Sweep Range 3 56 Selecting Linear or Logarithmic Sweep 3 57 Setting Step Size 3 59 System Configuration Configuring the Front Panel 3 81 Configuring the GPIB 3 85 Configuring the Rear Panel 3 82 Configuring the RF 3 83 Frequency Scaling 3 81 Menu Map 4 18 681XXC OM Setting Increment Sizes 3 88 T Test Equipment 1 8 5 3 Testing Operational Verification CW Frequency Accuracy 5 5 Initial 681XXC Checkout 5 4 Power Level Accuracy and Flatness 5 13 Test Equipment 5 3 Test Records 5 3 5 7 5 12 5 19 5 45 Troubleshooting Tables 6 10 6 12 Use With Other Instruments Master Slave Operation 7 4 Use with a 360B Vector Network Analyzer 7 11 Use with a 56100A Scalar Network Analyzer 7 10 Use With a HP8757D Scalar Network Analyzer 7 16 Index 3 Index 4
70. 2 Vac or 180 264 Vac 48 440 Hz 400 VA maximum Standby With ac line power connected unit is placed in standby when front panel power switch is released from the OPERATE position Weight 23 kg maximum Dimensions 133 H x 429 W x 597 D mm RF Output Connector Type female lt 40 GHz models Type V female gt 40 GHz models ENVIRONMENTAL Storage Temperature Range 40 C to 75 C Operating Temperature Range 0 C to 50 C Relative Humidity 5 to 95 at 40 C Altitude 4 600 meters EMI Meets the radiated emission requirements of EN55011 1991 CISPR 11 1990 Group 1 Class A 50082 1 1997 61000 4 2 1995 4 CD 8 kV AD 61000 4 3 1997 3 50204 3 V m 61000 4 4 1995 0 5 SL 1 kV PL EN 61000 4 5 1995 1 kV L L 2 L E MIL STD 461C Part 2 REO1 REO2 01 501 502 506 8503 8 INPUTS OUTPUTS Input Output Connectors Nomenclature Type Location AM IN BNC Front amp Rear Panel FM IN BNC Front amp Rear Panel BNC Front amp Rear Panel EXT ALC IN BNC Front amp Rear Panel K Connector Standard Front Panel eeu V Connector Option 9 Rear Panel 10 MHz REF IN BNC Rear Panel 10 MHz REF OUT BNC Rear Panel HORIZ OUT BNC Rear Panel AUX I O 25 pin D type Rear Panel SERIAL RJ45 Rear Panel IEEE 488 GPIB Type 57 Rear Panel AM IN Accepts an external signal to AM modulat
71. 2 dBm dBm 6 5 dBm dBm 2 dBm dBm 3 dBm dBm 5 5 dBm dBm 3 dBm dBm 4 dBm dBm 4 5 dBm dBm 4 dBm dBm 5 dBm dBm 3 5 dBm dBm 5 dBm dBm 6 dBm dBm 2 5 dBm dBm 6 dBm dBm 7 dBm dBm 1 5 dBm dBm 7 dBm dBm 8 dBm dBm 4 0 5 dBm dBm 8 dBm dBm 9 dBm dBm 0 5 dBm dBm 9 dBm dBm 10 dBm dBm 1 5 dBm dBm 10 dBm dBm 11 dBm dBm 2 5 dBm dBm 11 dBm dBm 12 dBm dBm 3 5 dBm dBm 12 dBm dBm 13 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Specification is 1 5 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 1 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 40 GHz 2 2 dB 40 to 50 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 1 dBm dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 05 to 20 GHz 8 2 dB 20 to 40 GHz 10 2 dB 40 to 50 GHz typical not a specification 5 42 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Leve Accuracy Flatness Test Record 25 of 27 Model 68187C Serial No Date Model 68187C without Option 2D Step Attenuator Power Level Accuracy Power Level Accuracy Power Level Accuracy CW Frequency 5 0 GHz CW Frequency 25 0 GHz CW Frequency 50 0 GHz Set Power Measured Power Set Power Measured Power Set
72. 3 Normal Operation Error and Warning Status Messages don xe e he 6 8 6 3 TROUBLESHOOTING o aacra ain 6 10 6 4 ROUTINE MAINTENANCE 6 13 Cleaning the Fan Filter 6 13 Cleaning the Data Display 6 13 ReplacingtheLineFuse 6 14 6 1 6 2 INTRODUCTION ERROR AND WARNING STATUS MESSAGES 681XXC OM Chapter 6 Operator Maintenance This chapter provides the information necessary for operator mainte nance of the signal generator Operator maintenance is limited to troubleshooting and repairs that can be made without removing the instrument covers During normal operation the 681 generates error messages to in dicate internal malfunctions abnormal signal generator operations or invalid signal inputs or data entries It also displays warning mes sages to alert the operator to conditions that could result in inaccurate signal generator output In addition status messages are displayed to remind the operator of current menu selections or settings Self Test The 681XXC firmware includes internal diagnostics Error that self test the instrument These self test di ag Messages nostics perform a brief go no go test of most of the instrument PCBs and other internal assemblies CAUTION During self test with RF OUTPUT set to ON the output power level is set to 0 dBm Always disconnect sensitive equipment from the unit before performing se
73. 30 kHz typical in Detector mode 0 7 Hz typical in Power Meter mode B 5 PERFORMANCE SPECIFICATIONS User Level Flatness Correction Number of points 2 to 801 points per table Number of tables 5 available Entry modes GPIB power meter or computed data CW POWER SWEEP Range Sweeps between any two power levels at a single CW frequency Resolution 0 01 dB step Log or 0 001 mV Linear Accuracy Same as CW power accuracy Log Linear Sweep Power sweep selectable as either log or linear Log sweep is in dB linear sweep is in mV Step Size User controlled 0 01 dB Log or 0 001 Linear to the full power range of the instrument Step Dwell Time Variable from 1 ms to 99 seconds If the sweep crosses a step attenuator setting there will be a sweep dwell of approximately 20 ms to allow setting of the step attenuator SWEEP FREQUENCY STEP POWER A power level step occurs after each frequency sweep Power level remains constant for the length of time re quired to complete each sweep MODULATION AMPLITUDE MODULATION All amplitude modulation specifications apply at 50 depth 1 kHz rate with RF level set 6 dB below maximum specified leveled output power unless otherwise noted External AM Input Log AM or Linear AM input front or rear panel BNC 509 or 6009 input impedance All options selectable from modulation menu AM Sensitivity Log AM Continuously variable from 0 dB volt to 25 dB volt Linear AM Continuously
74. 6 PREPARATION FOR STORAGE SHIPMENT 681XXC OM PREPARATION FOR STORAGE SHIPMENT The following paragraphs give instructions for preparing the 681XXC for storage or shipment Preparation for Storage Preparation for Shipment Preparing the signal generator for storage consists of cleaning the unit packing the inside with mois ture absorbing desiccant crystals and storing the unit in a temperature environment that is main tained between 40 C and 75 To provide maximum protection against damage in transit the signal generator should be repackaged the original shipping container If this container is no longer available and the unit is being returned to Anritsu for repair advise Anritsu Customer Serv ice they will send a new shipping container free of charge In the event neither of these two options is possible instructions for packaging and shipment are given below Use a Suitable Container Obtain a corrugated cardboard carton with a 125 kg test strength This carton should have inside dimen sions of less than 15 cm larger than the unit di mensions to allow for cushioning Protect the Instrument Surround the unit with polyethylene sheeting to protect the finish Cushion the Instrument Cushion the instrument on all sides by tightly pack ing dunnage or urethane foam between the carton and the unit Provide at least three inches of dun nage on all sides Seal the Container Seal the carto
75. 81XXC OM LOCAL OPERATION AMPLITUDE MAPS MODULATION MODE CW SWEEP SELECT On Off Log AM 0 25dB V or Sensitivitu Linear AM 0 100 V Vno Hem Impedance Edit AM Sensitivity 6000 or 50 0 Input Impedance Front Panel Input or Rear Panel Input SELECT m Sensitivity m Impedance LEVEL CONTROL Display Showing AM Selected On NOTE Refer to Chapter 3 paragraph 3 12 for AM Mode operating instructions Figure 4 11 Amplitude Modulation Mode Menu Map 681XXC OM 4 15 LOCAL OPERATION FREQUENCY MAPS MODULATION MODE CW SWEEP SELECT FREQUENCY COI NTROL LEVEL ALC SELECT LEVEL CONTROL MODULATION SYSTEM On Off Edit FM Sensitivity 6000 or 50 9 Input Impedance Front Panel Input or CM External FH Status Select Locked FM Mode FM Off ___ Selects Unlocked Narrow F _ Sensitivity Impedance Mode aS Source i Selects Unlocked Wide FM Mode Deviation kH FM Mode Rear Panel Input CW SWEEP SELECT FREQUENCY Em ONTROL 6 itivit Sensitivity LEVEL ALC Hm Impedance LEVEL SE OF Display Showing FM Selected On NOTE Refer to Chapter 3 paragraph 3 12 for FM Mode operating instructions Figure 4 12 Frequency Modulation Mode Menu Map 4 16 681XXC OM LOCAL OPERATION MAPS 681XXC OM SQUARE WAVE MODULATIO
76. B address 681XXC OM INSTALLATION Selecting the Line Terminator Selecting the Interface Language 681XXC OM GPIB SETUP AND INTERCONNECTION Data is delimited on the GPIB by either the carriage return CR ASCII character or both the carriage re turn and linefeed CR LF ASCII characters Which character is used depends upon the requirements of the system controller Most modern controllers can use either CR or CR LF while many older control lers require one or the other Consult the controller s manual for its particular requirements From the Configure GPIB Menu display you can se lect which GPIB terminator to use by pressing the menu soft key Line Term This menu soft key tog gles the GPIB terminator between CR and CR LF The current selection appears on the display Series 681XXC Synthesized Signal Generators can be remotely operated via the GPIB using one of two external interface languages Native or SCPI Op tion 19 The Native interface language uses a set of 681XXC GPIB Product Specific commands to control the instrument the SCPI interface language uses a set of the Standard Commands for Programmable Instruments commands to control the unit The Configure GPIB Menu has additional menu dis plays For instruments with Option 19 selection of which external interface language is to be used is made from this additional menu From the Config ure GPIB Menu display you can access the first additional menu
77. Bm Maximum variation is 6 0 dB typical not a specification 681XXC OM Variation dB 5 27 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Level Accuracy Flatness Test Record 10 of 27 Model 68137C w Option 15A Serial No Date Model 68137C with Option 15A High Power without Option 2 Step Attenuator Power Level Accuracy CW Frequency 5 0 GHz Set Power Measured Power 17 dBm dBm 16 dBm dBm 15 dBm dBm 14 dBm dBm 13 dBm dBm 12 dBm dBm 11 dBm dBm 10 dBm dBm 9dBm dBm 8 dBm dBm 7 dBm dBm 6 dBm dBm 5 dBm dBm Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 17 dBm dBm dBm dB Maximum variation is 1 6 dB Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 17 dBm dBm dBm dB Maximum variation is 2 0 dB typical not a specification 5 28 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Leve Accuracy and Flatness Test Record 11 of 27 Model 68137C w Option 15A Serial No Date Model 68137C with Option 15A High Power with Option 2A Step Attenuator Power Level Accuracy CW Frequency 5 0 GHz Set Power Measured Power 15 dBm dBm 14 dBm dBm 13 dBm dBm 12 dBm dBm 11 dBm dBm 10 dBm dBm 9dBm dBm 8dBm dBm 7 dBm dBm 6 dBm dBm 5 dBm dBm 4 dBm dBm 3 dBm dBm Spe
78. Bm 6 dBm dBm 1 5 dBm dBm 1 5 dBm dBm 5dBm dBm 2 5 dBm dBm 2 5 dBm dBm 4dBm dBm 3 5 dBm dBm 3 5 dBm dBm 3dBm dBm 4 5 dBm dBm 4 5 dBm dBm 2dBm dBm 5 5 dBm dBm 5 5 dBm dBm 1 dBm dBm 6 5 dBm dBm 6 5 dBm dBm 0dBm dBm 7 5 dBm dBm 7 5 dBm dBm 1 dBm dBm 8 5 dBm dBm 8 5 dBm dBm 2 dBm dBm 9 5 dBm dBm 9 5 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Specification is 1 5 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 2 5 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 40 GHz 2 2 dB 40 to 50 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 2 5 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 2 0 dB 0 05 to 20 GHz 4 0 dB 20 to 40 GHz 5 0 dB 40 to 50 GHz typical not a specification 681XXC OM 5 41 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Leve Accuracy Flatness Test Record 24 of 27 Model 68177C Serial No Date Model 68177C with Option 2C Step Attenuator Power Level Accuracy Power Level Accuracy Power Level Accuracy CW Frequency 5 0 GHz CW Frequency 25 0 GHz CW Frequency 45 0 GHz Set Power Measured Power Set Power Measured Power Set Power Measured Power 8 5 dBm dBm 0dBm dBm 1 dBm dBm 7 5 dBm dBm 1 dBm dBm
79. Bm 2dBm dBm 2dBm dBm 1 dBm dBm 1 dBm dBm 0 dBm dBm 0 dBm dBm 1 dBm dBm 1 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 20 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 05 to 20 GHz typical not a specification 5 32 681 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Leve Accuracy Flatness Test Record 15 of 27 Model 68147C Serial No Date Model 68147C with Option 2F Step Attenuator Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 3 dBm dBm 3 dBm dBm 2 dBm dBm 2 dBm dBm 1 dBm dBm 1 dBm dBm 0 dBm dBm 0 dBm dBm 1 dBm dBm 1 dBm dBm 2 dBm dBm 2 dBm dBm 3 dBm dBm 3 dBm dBm 4 dBm dBm 4 dBm dBm 5 dBm dBm 5 dBm dBm 6 dBm dBm 6 dBm dBm 7 dBm dBm 7 dBm dBm 8 dBm dBm 8 dBm dBm 9 dBm dBm 9 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 3 dBm dBm dBm dB Maximum variatio
80. Bm 6 dBm dBm 5 dBm 5 dBm dBm 4dBm dBm 4dBm dBm 3 dBm dBm 3 dBm dBm 2 dBm dBm 2 dBm dBm 1 dBm dBm 1 dBm dBm 0 dBm dBm 0 dBm dBm 1 dBm dBm 1 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 8 4 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 05 to 8 4 GHz typical not a specification 5 24 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Accuracy and Flatness Test Record 7 of 27 Model 68137C Serial No Date Model 68137C without Option 2 Step Attenuator Power Level Accuracy CW Frequency 5 0 GHz Set Power Measured Power 13 dBm dBm 12 dBm dBm 11 dBm dBm 10 dBm dBm 9dBm dBm 8 dBm dBm 7 dBm dBm 6 dBm dBm 5 dBm dBm 4 dBm dBm 3 dBm dBm 2 dBm dBm 1 dBm dBm Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 13 dBm dBm dBm dB Maximum variation is 1 6 dB Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 13 dBm dBm dBm dB 681XXC OM 5 25 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS
81. C OM 6 11 OPERATOR MAINTENANCE 6 12 TROUBLESHOOTING Table 6 4 Troubleshooting 3 of 3 UNSa is Displayed Trouble Description This message is displayed to indicate that the RF output is unleveled Step 1 Check that the output power does not exceed the specified leveled power rating and that the RF OUTPUT connector is terminated into a 500 load Reduce the power level to not exceed the specified leveled power rating or terminate the RF OUTPUT connector with a 50Q load If error message remains displayed call a service technician is Displayed Trouble Description This message is displayed in the frequency parameters area to indicate that 1 the analog sweep start frequency entered is greater than the stop frequency 2 the dF value entered results in a sweep outside the range of the instrument 3 the step size value entered is greater than the sweep range 4 the number of steps entered results a step size of less than 1 kHz 0 1 Hz with Option 11 or 0 1 dB 0 01 mV or 5 the step sweep time entered divided by the number of steps entered results in a dwell time of 10 ms Step 1 Checkthat 1 the analog sweep start frequency entered is not greater than the stop frequency 2 the dF value entered does not try to set the frequency sweep outside the range of the signal generator 3 the step size entered is not greater than F2 minus F1 4 the number of steps entered does not result i
82. EL OPERATION Selecting a CW Power Sweep Trigger 681XXC OM POWER LEVEL SWEEP OPERATION There arethree modes of triggering provided for the CW power sweep automatic external and single The sweep trigger is selectable from the CW L evel Sweep Trigger menu Thefollowing is a description of each trigger mode Auto Automatic The CW power sweep con tinually sweeps from its start power level toits stop power level with optimal retrace time External The CW power sweep recurs when triggered by an external TTL compatible clock pulse to the rear panel AUX I O connector Single A single CW power sweep starts when thetrigger key is pressed If a sweep is in prog ress when the key is pressed it aborts and re sets To goto the CW Level Sweep Trigger M enu below from the CW L evel Sweep Ramp menu press Trigger Menu ECH 3 988 BEE BEE GHz To select a CW power sweep trigger mode press its menu soft key A message showing the CW power sweep trigger mode selected appears on the right side of the level mode title bar If you select the single sweep trigger mode the menu display changes adding the menu soft key labeled Trig Pressing Trig starts a single CW power sweep If a single CW power sweep is in prog ress pressing Trig causes the sweep to abort and reset Press Previous Menu to return to the CW L evel Sweep Ramp Menu display 3 55 LOCAL FRONT PANEL OPERATION Selectin
83. EPS DWELL TIME STEPS 68117C 50 ms 1ms 50 50 ms 50 0 0 dB 68137C 50 ms 1ms 50 50 ms 50 0 0 dB 68147C 50 ms 1ms 50 50 ms 50 0 0 dB 68167C 50 ms 1ms 50 50 ms 50 0 0 dB 68177C 50 ms 1ms 50 50 ms 50 0 0 dB 68187C 50 ms 1ms 50 50 ms 50 0 0 dB 68197C 50 ms 1ms 50 50 ms 50 0 0 dB 681XXC OM 3 17 LOCAL FRONT PANEL OPERATION 3 6 ENTERING DATA 3 18 ENTERING DATA Before proceeding to the various modes of signal generator operation you need to know how to enter data from the front panel Entering data refers to changing 5 value by editing its current value or entering a new value replace the current value The follow ing instructions describe how to 1 open a parameter 2 edit its cur rent value and 3 enter a new value A typical 681XXC menu display below is used throughout the data entry instructions At this menu display you can edit both the CW fre quency and the output power level parameters EL If you wish to follow along on your 681XXC you can obtain this same menu display by resetting your instrument press then press Reset Opening the order for the value of a parameter to be changed Parameter the parameter must first be opened To open the frequency parameter from the above menu press Edit F1 The menu display now changes to show that the menu soft key Edit F1 has been pressed and that the frequency parameter has been opened An open parameter is indicat
84. FM mode allows maxi mum devia tions of 10 MHz for DC to 500 kHz rates 681XXC OM LOCAL FRONT PANEL OPERATION Providing Frequency Modulation Sensitivity E Impedance FM Mode Deviation i UNLOCKED When Unlocked Narrow or locked Wide is selected ON this warning messageis displayed on all menu displays to remind the opera tor that the carrier frequency is not phase locked 681XXC OM SIGNAL MODULATION Unlocked Wide mode frequency modulation is accomplished by applying the modulating signal to the main tuning coil of the YI G tuned oscillator U n locked Wide FM mode allows maximum deviations of 100 MHz for DC to 100 Hz rates To provide frequency modulation first set up the ex ternal signal generator then connect it to either the 681XXC front or rear panel FM IN connector Next press eS At the resulting menu display press FM The right most External FM Status Menu below is displayed Pressing More brings up the left most menu Sensitivity Emme Impedance FM Mode Deviation Now press the menu soft key FM Modes The third External FM Status Menu below is displayed Imieedance 4 Source FM Mode Deviation off Sensitivity 1 088 This menu lets you select the FM operating mode Press Locked LN to select the Locked Low Noise FM operating mode Press Locked to select the Locked FM
85. L OPERATION Manual Sweep Mode Selecting Manual Sweep Mode 3 32 SWEEP FREQUENCY OPERATION In manual sweep frequency mode the output fre quency can be manually tuned in phase locked steps between the selected start and stop frequencies us ing the rotary data knob As the knob is turned the current output frequency is displayed on the data display as Fm The step size or number of steps be tween the start and stop frequencies are controlla ble from the manual sweep menu The step size range is 1 kHz 0 1 Hz with Option 11 tothe full frequency range of the instrument the number of steps range 15 1 to 10 000 To place the 681XXC in manual sweep frequency mode press the main menu key CW SWEEP SELECT At the resulting menu display press Manual The Manual Sweep Menu below is then displayed Manual Sw F1 AEE UH d GHz BRE z H BE 226 This menu lets you perform the following Select a sweep range edit the start and stop frequency parameters Set the step size or number of steps previously described on page 3 30 681XXC OM LOCAL FRONT PANEL OPERATION This error message is displayed when 1 theanalog sweep start fre quency entered is greater than the stop frequency 2 the dF value entered results in a sweep outside the range of the 681XXC Entering valid values will clear the error 681XXC OM Selecting a Swe
86. Level Menu below is displayed 4 588 GEG BEE B GHz Level Li Of FM FF O a OF fs t ALC Call This menu lets you perform the following Edit the power level parameter Edit thelevel offset parameter Turn level offset on off There are several ways to select a power level for output You can 1 edit the current power level 2 enter a new power level or 3 select one of the 10 preset power level parameters Editing the Current Power Level Press Edit L1 to open the power level parameter then edit the current power level using the cursor control key or the rotary data knob To dose the open power level parameter press Edit L1 or make another menu selection Entering a New Power Level Press Edit L1 to open the power level parameter then enter the new power level using the keypad 3 49 LOCAL FRONT PANEL OPERATION NOTE When Linear power level units are selected use the following termina tor keys for power level data entries GHz Sec dBm for V MHz ms dB for mV kHz us STEPS for uV 3 50 FIXED POWER LEVEL OPERATION and appropriate terminator key To close the open power level parameter press Edit L1 or make an other menu selection Selecting a Preset Power Level To select one of the preset power levels for output press the main menu key LEVEL CONTROL The Level Control menu below is displayed Th
87. M Sensitivity rameter then edit the current value using the cur sor control key or rotary data knob or enter a new value using the keypad and the appropriate termi nator key The FM Sensitivity range 15 10 2 to 20 MHzN for Locked and Unlocked Narrow modes and 100 kHz V to 100 MHz V for Unlocked Wide FM mode To dosethe open FM Sensitivity pa rameter press Edit Sens or make another menu se lection Press 6009 509 to select the input impedance of the input connector The FM status display will reflect your selection Press Front Rear to select the front or rear panel FM IN connector The FM status display will reflect your selection 681XXC OM SIGNAL LOCAL FRONT PANEL OPERATION Square Wave Modulation Operating Modes Providing Square Wave Modulation MODULATION The 681XXC provides square wave pulse modula tion of the output signal using modulating signals from either its internal square wave generator or an external signal generator The signal generator s internal square wave genera tor outputs modulating signals of 400 Hz 1 kHz 7 8125 kHz and 27 8 kHz The modulating signals are selectable from a menu The 681XXC accepts modulating signals from an ex ternal signal generator that are TTL compatible with the minimum pulse width of 25 us The following are the menu selections necessary to provide square wave pulse modulation of the out put signal using a modulating signal
88. MANCE SPECIFICATIONS AUX I O Auxiliary Input Output Provides for most of the rear panel BNC connections through a single 25 pin D type connector Supports master slave operation with an other 68XXXB C synthesizer and allows for a single cable interface with the Model 56100A Scalar Network Analyzer and other Anritsu instruments For a pinout diagram and de scriptions see Appendix A Figure A 2 SERIAL Serial Input Output Provides access 10 RS 232 terminal ports to support service and calibration functions and master slave operations IEEE 488 GPIB Provides input output connections for the General Purpose Interface Bus GPIB For a pinout dia gram see Appendix A Figure A 3 681XXC OM OPTIONS Option 1 Rack Mounting Rack mount kit containing a set of track slides 90 tilt capability mounting ears and front panel handles to let the instrument be mounted in a standard 19 inch equipment rack Option 2A 110 dB Step Attenuator Adds a 10 dB step attenuator with 110 dB range for models having a high end frequency of lt 20 GHz Rated RF output power is reduced Option 2B 110 dB Step Attenuator Adds a 10 dB step attenuator with 110 dB range for models having a high end frequency of lt 40 GHz Rated RF output power is reduced Option 2C 90 dB Step Attenuator Adds a 10 dB step attenuator with 90 dB range for models having a high end frequency of lt 50 GHz Rated RF output power is reduced Option 2D 90 dB Step At
89. Menu tore turn to the Level Control Menu display Scanning Tagged Levels To goto the Tagged L ev els menu shown below from the L evel Control menu press Tag Lvl Menu EL This menu lets you select the tagged power levels for output using the Scan Up and Scan Dn keys Return to the Level Control Menu display by press ing Previous Menu 3 51 LOCAL FRONT PANEL OPERATION When Offset is selected ON this status message is displayed on all menu displays to remind the opera tor that a constant offset has been applied to the displayed power level 3 02 Level Offset FIXED POWER LEVEL OPERATION L evel offset lets you compensate for a device on the signal generator s output that alters the RF output power level at the point of interest For example the power level at the test device may be less or more than the displayed power level because of the loss through an external transmission line or the gain of an amplifier located between the 681XXC RF output and the test device Using the level offset function you can apply a constant to the displayed power level that compensates for this loss or gain The dis played power level will then reflect the actual power level at the test device To enter an offset value and apply it to the displayed power level go to the Level Menu Then press Edit Offset As shown in the following menu this opens the offset parameter for editing
90. N MODE Internal Square Wave Source Selected Square Wave OFF Square Wave Internal Square Wave Source or Frequency 488 Hz Modulation On Off mA Polarity RF Internal External Square Wave Source Low Level Triggers RF or E cL SPEI HIGH Level Triggers RF Select Frequency Square Have Freauenou HN Polarity Hie Source External Square Wave Source Selected Square Wave my Polarity Internal Square Wave Source or Modulation On Off Source Square Frequency External Square Wave Source Level Triggers or HIGH Level Triggers RF Front Panel Input Rear Panel Input Fi Square Wave Status Square Wave off Frequency Ext Polarity High On Source Front NOTE Refer to Chapter 3 paragraph 3 12 for Square Wave Modulation Mode operating instructions Figure 4 13 Square Wave Modulation Mode Menu Map 4 17 LOCAL OPERATION SYSTEM MAPS CONFIGURATION CWISWEEP SELECT FREQUENCY CONTROL IS ga SELECT LEVEL CONTROL MODULATION SYSTEM Front Panel Rear Panel GPIB Incr AM m Menu Brightens The Display Dims The Display F
91. N connector Next press At the resulting menu display press AM Theright most External AM Status Menu below is displayed Pressing More bring up the left most menu HH Sensitivity mm Impedance This menu contains an external AM status window that shows the current menu selections and the measured AM Depth The AM depth measurement function measures the voltage of the external modu lation signal and calculates the percentage modula tion value This menu lets you perform the following Turn AM on and off Select the Linear AM or Log AM operating mode Set theAM Sensitivity 3 73 LOCAL FRONT PANEL OPERATION lt This error message is displayed when the external AM modulating signal exceeds the input voltage range The message Reduce Input Level also appears at the bot tom ofthe AM status display AM is turned off until the modulating sig nal is within the input voltage range 3 74 Frequency Modulation Operating Modes SIGNAL MODULATION Select the input impedance 6000 or 500 of theinput connector Select the input connector front panel or rear panel AM IN that is connected to the external signal source Press Off to turn AM on and off Both the AM status display and AM modulation status area will reflect your selection Press Log Linear to select the AM oper
92. OPERATE light is ON Normal Operation When the 681XXC is connected to the power source the OPERATE light should illuminate and the instrument should power up If the OPERATE light illuminates but the unit fails to power up the 681XXC has an internal component fail ure Call a service technician 6 10 681XXC OM OPERATOR MAINTENANCE TROUBLESHOOTING Table 6 4 Troubleshooting 2 of 3 Signal Generator Quits During Operation OPERATE light remains on Trouble Description The signal generator operates for some time then shuts down OPERATE light remains on After a short period the signal generator resumes normal operation This is an indication that the 681XXC has reached an excessive operating temperature Step 1 Check that the fan is still operating during the time that the instrument is shut down Ifthe fan is still operating clean the air filter see page 6 13 a Ifthefan is not operating call a service technician Kole dieli is Displayed Trouble Description This message is displayed in the frequency rameters area to indicate that the output frequency is not phase locked It is normally caused by an internal component failure Step1 Performa self test of the signal generator by pressing the System M enu soft key Selftest If self test does not result in an error message s resume normal operation Ifan error message s is displayed call a service techni cian 681XX
93. P N 2100 1 to the 56100A rear 56100A SNA will only accept panel DEDICATED GPIB connector Con and display theninevideomarkers nect the other end of the cable to the Fl thru F9 from the 681XXC 681XXC rear panel IEEE 488 GPIB con When performing amplifier testing e m use the 681XXC power level Step3 Turn on the 681XXC and the 56100A system is now ready to operate 7 10 681XXC USE WITH OTHER INSTRUMENTS 7 4 USE WITH A 360B VECTOR NETWORK ANALYZER USE WITH A 360B VECTOR NETWORK ANALYZER The 681XXC signal generator is compatible with the Anritsu Model 360B Vector Network Analyzer VNA The following paragraphs pro vide instructions for connecting the 681XXC to the 360B VNA and con figuring the signal generator so that it can operate as a signal source for the analyzer Operating instructions for the vector network ana lyzer can be found in the Model 360B Vector Network Analyzer Opera tion Manual P N 10410 00110 GPIB MODEL 360B VECTOR NETWORK ANALYZER SOURCE CONTROL SYSTEM BUS 10 MHz REF OUT EXT FM LOCK OUTPUT MODELS 361XA AND 362XA TESTSETS SEMI RIGID COAXIAL CABLE FM IN F MODEL 681XXC SIGNAL GENERATOR 10 MHz REF IN
94. PERATION LOCAL FRONT OPERATION Open the parameter you wish to change then edit the current value using the cursor control key or the rotary data knob or enter a new value using the key pad and appropriate termination key When you have finished setting the open parameter close it by pressing its menu soft key or make another menu selection Press More to goto the Additional Step Sweep Ramp menu Press Previous Menu to return to the Step Sweep Menu display Additional Step Sweep Ramp Menu When you press More the Additional Step Sweep Ramp Menu below is displayed This menu lets you set the sweep time select loga rithmic or linear step sweep and go to the trigger menu To open the sweep time parameter for editing press Sweep Time Edit the current sweep time using the cursor control key or the rotary data knob or enter a new sweep time using the keypad and appropriate terminator key To close the open sweep time pa rameter once you have set the desired time press Sweep Time make another menu selection Press Log Linear to select logarithmic or linear step sweep operation The soft key label is highlighted in reverse video to reflect your selection Press Trigger Menu to go to the Step Sweep Trigger menu The trigger menu lets you select a sweep trig ger previously described on page 3 28 Press Previous Menu to return to the Step Sweep Ramp Menu display 681XXC OM 3 31 LOCAL FRONT PANE
95. SERIES 681XXC SYNTHESIZED SIGNAL GENERATOR OPERATION MANUAL Ainritsu 490 JARVIS DRIVE P N 10370 10333 MORGAN HILL CA 95037 2809 REVISION B PRINTED APRIL 2001 COPYRIGHT 1999 ANRITSU CO WARRANTY The Anritsu product s listed on the title page is are warranted against defects in materials and workmanship for one year from the date of shipment Anritsu s obligation covers repairing or replacing products which prove to be defective during the warranty period Buyers shall prepay transportation charges for equipment returned to Anritsu for warranty repairs Obligation is limited to the original purchaser Anritsu is not liable for conse quential damages LIMITATION OF WARRANTY The foregoing warranty does not apply to Anritsu connectors that have failed due to normal wear Also the warranty does not apply to defects resulting from improper or inadequate maintenance by the Buyer unauthorized modification or misuse or operation outside of the environmental specifi cations of the product No other warranty is expressed or implied and the remedies provided herein are the Buyer s sole and exclusive remedies TRADEMARK ACKNOWLEDGEMENTS Adobe Acrobat is a registered trademark of Adobe Systems Incorporated NOTICE Anritsu Company has prepared this manual for use by Anritsu Company personnel and customers as a guide for the proper installation operation and maintenance of Anritsu Company equipment and computor programs
96. T 0 EEG mE Slave Frequencies List Edit Current Tag Untag Highlighted Frequency Frequency Edit Highlighted Frequency Output Highlighted Edit Current Frequency Power Level Output Next Tagged Frequency Output Previous Tagged Frequency Edit Current Power Level Edit Highlighted Frequency Set Slave Frequency Offset in 360B VNA Mode Set Slave Power Level in 360B VNA Mode L1 0 00 dBm am L 5 Refer to Chapter 7 paragraph 7 2 for Master Slave operating in structions Refer to Chapter 3 paragraph 3 7 for CW Frequency Mode operating instructions Figure 4 2 CW Frequency Mode Menu Map 4 6 681XXC OM LOCAL OPERATION MAPS 681XXC OM LEVEL ALC SELECT LEVEL CONTROL MODULATION SYSTEM Can Be Selected From Any Analog Menu Display ANALOG SWEEP FREQUENCY MODE gt CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL MODULATION Edit Start Frequency Edit End Frequency v p Edit Current _ Edit Current Sweep Time Power Level Hott HII Triggers Single Sweep Analog Sweer Auto Edit Alt Sweep F3 2 000 GHz Start Frequency F2 28 008 5 006 Edit Alt Sweep
97. USE AM AUX IN o o 29 E INPUT 90 132 180 264 ore 48 440Hz o 400VA max o o o SERIAL oe 2 ZA WARNING DO NOT OPERATE WITH POWER CORD UNGROUNDED IEEE 488 GPIB AN WARNING NO OPERATOR SERVICE ABLE PARTS INSIDE REFER SERVICING TO QUALIFIED PERSONNEL SLOW BLO FUSES T25A 220V T5A LINE ney SELECT FigureA 1 Rear Pand Series 681XXC Synthesized Signal Generator 1 of 2 A 2 S 681XXC OM REAR PANEL CONNECTORS AUX I O 25 pin connector that provides for single cable interface with another 68XXXB C master slave operation and with other Anritsu instruments such as the Anritsu 56100A Scalar Network Analyzer A pinout diagram for this connector is shown in Figure A 2 HORIZ OUT Provides a OV to 10V ramp during all sweep modes regardless of sweep width In the CW mode provides a voltage between OV and 10V proportional to the full frequency range of the instrument When the CW Ramp is enabled connector provides a repetitive OV to 10V ramp BNC connector 500 impedance 10 MHz REF IN Accepts an external 10 MHz 100 Hz 0 to 10 dBm time base signal Automatically disconnects the internal high stability time base option if installed BNC connector 509 impedance 10 MHz REF OUT Provides a 0 5 Vp p AC coupled 10 MHz signal
98. UT Pm E z m mm mm mm 2 ooo z ES mm RF CH 1 or X Input Sensor Figure 5 2 Equipment Setup for Power Level Accuracy and F latness Tests Test Setup Connect the equi pment shown in Figure 5 2 as follows Step1 Calibratethe Power Meter with the Power Sensor NOTE For 40 GHz models use the MA2474A power sensor for 240 GHz models usetheM 2475 power sensor Step2 Connect the Power Sensor to the RF OUT PUT of the 681XXC Step3 Connect the 681XXC rear panel HORIZ OUT to the Oscilloscope CH 1 input X in put NOTE Before starting these procedures locate the test record in Table 5 3 for the particular 681XXC model configuration being tested 681XXC OM 5 13 OPERATION VERIFICATION Power Level Accuracy Test Procedure 207 NOTE n models with Option 22 that have a high end frequency of 20 GHz rated output power is reduced by 1dB In models with Option 22that have a high end frequency of 220 GHz rated output power is duced by 2 dB 5 14 POWER LEVEL ACCURACY AND FLATNESS TESTS Power level accuracy is checked by stepping the power down in 1 dB increments from its maximum rated power level Step 1 Step 2 Step 3 Step 4 Step 5 Step 6 Set up the 681XXC as follows a Reset the instrument by pressing a then Reset The CW Menu below is dis
99. VERIFICATION ACCURACY TEST 5 5 CW FREQUENCY The following test verifies that the CW frequency output of the signal ACCURACY TEST generator is within accuracy specifications Table 5 2 beginning on 5 7 contains test records that you copy and use to record test results for this test Test records for standard 681XXC models are con tained in Table 5 2A test records for 681XXC models with Option 11 are contained in Table 5 2B 681XXC SIGNAL GENERATOR FREQUENCY COUNTER 10 MHz REF OUT _ E PN LU SSS UM ECCE RF OUT Band 4 10 MHz Input Input 26 5 to 65 GHz Mixer Connection A 0 01 to 26 5 GHz Figure 5 1 Equipment Setup for CW Frequency Accuracy Test Test Setup 681XXC OM Connect the equipment shown in Figure 5 1 as fol lows Step 1 Step 2 Connect the 681XXC rear panel 10 MHz REF OUT to the F requency Counter 10 MHz External Reference input If the Frequency Counter has an INT EXT tog gle switch ensure the switch is set to EXT Connect the 681XXC RF OUTPUT tothe Frequency Counter RF Input as follows a For measuring frequencies of 0 01 to 1 0 GHz connect to the Band 2 input Connection A For measuring frequencies of 1 0 to 26 5
100. With Change in Step Attenuator 20 ms typical With Change in Electronic Step Attenuator 3 ms typical Power level changes across 70 dB step will re sult in 20 ms delay ACCURACY AND FLATNESS Accuracy specifies the total worst case accuracy Flatness is included with the accuracy specification Step Sweep and CW Modes Attenuation Frequency Below GHz Max Power 0 01 20 20 40 40 50 50 60 60 65 Accuracy 0 25 1 0dB 1 0dB 1 5 88 1 5 88 1 5dB 25 60dB 1 0dB 1 0 88 1 5 3 5 N A Analog Sweep Mode typical Attenuation Frequency Below GHz Max Power 0 01 0 05 0 05 20 20 40 40 65 Accuracy 0 12 dB x2 0 dB 1 0 dB 2 0 dB x3 0 dB 0 30 dB 3 5 dB 3 5 dB 4 6 dB 5 6 dB 30 60 dB 4 0 dB 4 0 dB 5 2 dB 6 2 dB 60 122 dB 5 0 dB 5 0 dB 6 2 dB 7 2 dB Flatness 0 12 dB 2 0 dB 1 0 dB 2 0 dB 2 5 dB 0 30 dB 3 5 dB 3 0 dB 4 1 dB 5 1 dB 30 60 dB 3 5 dB 3 5 dB 4 6 dB 5 6 dB 60 122 dB 4 0 dB 4 0 dB 5 2 dB 6 2 dB OTHER OUTPUT POWER SPECIFICATIONS Output Units Output units selectable as either dBm or mV Selection of mV assumes 50Q load All data entry and display are in the selected units Output Power Resolution 0 01 dB or 0 001 mV Source Impedance 509 nomimal Source SWR Internal Leveling lt 2 0 typical Power Level Stability with Temperature 0 04 dB C typical Level Offset Offsets the displayed power level to estab
101. With Other Instruments Table of Contents 7 1 7 2 7 4 MASTER SLAVE OPERATION Connecting thelnstruments Initiating Master Slave Operation Master Slave Operation Master Slave Operationin VNAMode Terminating Master Slave Operation USE WITH 56100 SCALAR NETWORK ANALYZER 22 2347 9B Connecting the 681XXC tothe 56100A USE WITH 3608 VECTOR NETWORK Connecting the 681XXC tothe 360B Modes of Source Lock Mode Tracking USE WITH HP8757D SCALAR NETWORK ANALYZER a 2 x 44 Connecting the 681XXC tothe HP8757D Setting Up the 681XXC ax eb o o Ron Initiating HP8757D SNA Operation 7 1 681XXC OM Chapter 7 Use With Other Instruments This chapter provides information and instructions for using the Se ries 681XXC Synthesized Signal Generator with other Anritsu instu ments It contains the following Q Instructions for interconnecting and operating any two 68XXXC and or 68XXXB instruments in a master slave configuration Instructions for connecting the 681XXC to an Anritsu Model 56100A Scalar Network Analyzer so that it can be used as signal source for the analyzer Q Instructions for connecting
102. XC to local trol and then turn off the SS Mode To return the 681XXC to local control turn off the 360B VNA On the 681XXC press then Reset This turns off the Secure mode Next press KASUAN then Config to access the System Configuration Menu display At the System Configuration Menu press GPIB When the Configure GPIB Menu shown below is displayed press SS Mode toturn the SS mode off When operating in tracking mode the 360B steers its second local oscillator frequency and phase sig nal so as to phase lock itself to the reference signal from the 681XXC Due tothe inherent resolution of the 360 5 frequency readout frequency resolution is limited to 1 kHz intervals Tracking Mode Configuration In order for the 681XXC to operate with 360B tracking mode the signal generator must be operat ing in normal mode SS Mode off addition its GPIB address and data terminator must match the System Bus source address and data terminator that are set on the 360B VNA To verify the GPIB address and data terminator or to turn the SS mode off press 1031 t the System Menu display press Config When the Sys tem Configuration Menu is displayed press GPIB The Configure GPI B Menu shown below is dis played um Config GPIB E GPIB Address Terminator 55 Mode 681XXC OM USE WITH USE WITH A 360B VECTOR OTHER INSTRUMENTS NETWORK ANALYZER If the address of th
103. XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM SYSTEM CONFIGURATION Press Native SCPI to select the external interface language to be used for remote operation of the 681X XC Language selection is only available on instruments that have Option 19 installed Press More to go tothe Second Additional Config ure GPIB menu Press Previous Menu to return to the main Config ure GPIB Menu display Second Additional Configure GPIB Menu When you press More the Second Additional Con figure GPIB Menu below is displayed This menu lets you select scalar mode of operation with a Hewlett Packard Model 8757D Scalar Net work Analyzer Press 8757D Scalar to enable operations with a Hewlett Packard Model 8757D Scalar Network Ana lyzer Refer to paragraph 7 5 for procedures Press 8757D Scalar again to disable the operation Press Previous Menu to return to theFirst Addi tional Configure GPIB Menu display 3 87 LOCAL FRONT PANEL OPERATION Setting Increment Sizes 3 88 SYSTEM CONFIGURATION The Increment menu lets you set the incremental size for editing frequency power level and time pa rameters When the increment mode is selected on these parameter values will increase or decrease by the set amount each time the v is pressed or the rotary data knob is turned clockwise or coun ter clockwise The menu also lets you turn the incre ment mode on and off go to the ncrement menu
104. XXC in step sweep frequency mode press the main menu key CW SWEEP SELECT At the resulting menu display press Step The Step Sweep Menu below is then displayed Step Sweep Zz This menu lets you perform the following Select a sweep range edit the sweep start and stop frequency parameters Gotothe sweep ramp menu set the dwell time per step the step size or number of steps set the sweep time select log or linear sweep and select a sweep trigger Select an output power level for the sweep Gotothe alternate sweep menu In linear step sweep the sweep is linearly incre mented or decremented by the step size from the start frequency to the stop frequency There are two ways to set the size of each step of the linear step sweep set the step size or set the number of steps 3 29 SWEEP FREQUENCY PANEL OPERATION LOCAL FRONT This error message is displayed when 1 thestep size valueentered is greater than the sweep range 2 the number of steps entered results in a step size of less than 1 kHz 0 1 Hz with Option 11 or 3 the sweep time entered divided by the number of steps entered results in a dwell time of 10 ms Entering valid values will clear the error OPERATION The step size range is 1 kHz 0 1 Hz with Option 11 tothe full frequency range of the signal generator the number of steps 5 1 to 10 000 If the
105. XXC may or may not produce an RF output in this fre quency range Use caution and always determine the output power level when operating the 681XXC in this condition Error 134 13 25 20 GH Switched Filter Indicates a failure in the 13 25 20 GHz switched filter path within the switched filter assembly The 681XXC may or may not produce an RF output in this frequency range Use caution and always determine the output power level when operating the 681XXC in this condition Error 135 Modulator or Driver Failed 6 6 Indicates a failure of the modulator in the switched filter assembly or the modulator driver circuitry on the A9 PCB The 681XXC may or may not produce an RF output Use caution and always determine the output power level when operating the 681 XXC in this condition 681XXC OM ERROR AND WARNING STATUS MESSAGES OPERATOR MAINTENANCE Table6 1 Self Test Error Messages 4 of 4 Error Message Description Remarks Error 138 SDM Unit or Driver Failed Indicates a failure of the switched doubler module SDM or SDM bias regulator cir cuitry on the A14 PCB The 681XXC is still operable but it will not produce an RF output in the 20 40 GHz frequency range Error 139 32 40 GHz SDM Section Failed Indicates a failure in the 32 40 GHz switched doubler filter path within the SDM The 681 XXC is still operable but it will not produce an RF output in the 32 40 GHz frequency range Erro
106. alled firmware Anritsu EDISE Signal Generator Firmware Wersion COPYRIGHT 1998 Anritsu Ca The 681XXC then returns to the exact configuration it was in when last turned off Whenever the signal generator is not being used it should be left connected to the power source and placed in standby Standby operation provides power to keep the internal time base at operating temperature This assures specified frequency accu racy stability when the 681XXC is place op eration NOTE During standby operation the fan runs continuously Press LINE to switch the 681XXC from OPERATE green LED on to STANDBY orange LED on NOTE When switching to operate from standby allow at least a 30 minute warmup before beginning signal generator operations 681XXC OM LOCAL FRONT INSTRUMENT PANEL OPERATION START UP Self Testing the 681XXC The 681XXC firmware includes internal diagnostics that self test the instrument These self test di ag nostics perform a brief go no go test of most of the PCBs and other internal assemblies If the signal generator fails self test an error message is dis played on the data display Error messages and de scriptions are listed in the Operator Maintenance chapter of this manual CAUTION During self test with RF OUTPUT set to ON the output power level is set to 0 dBm Always disconnect sensitive equipment from the unit before performing self test
107. amming Manual is 10370 10334 SCPI Pro This manual provides information for remote opera gramming tion of the signal generator with Standard Com Manual mands for Programmable Instruments SCPI commands sent from an external controller via the 488 General Purpose Interface Bus GPIB It contains a general description of the GPIB and bus data transfer and control functions a complete list ing and description of each command in the 681XXC command set and examples of command us age The Anritsu part number for the SCPI Pro gramming Manual is 10370 10335 GENERAL INFORMATION 1 7 options 1 6 OPTIONS Maintenance Maintenance Manual supplies service informa Manual tion for all models in the 681XXC series The service information includes functional circuit descriptions block diagrams performance verification tests cali bration procedures troubleshooting data and as sembly and component removal replacement procedures The Anritsu part number for the Main tenance Manual is 10370 10336 The following options are available Option 1 Rack Mounting Rack mount kit containing a set of track slides 90 tilt capability mounting ears and front panel han dles for mounting the instrument in a standard 19 inch equipment rack Option 2A 110 dB Step Attenuator Adds a 10 dB per step attenuator with a 110 dB range for models having a high end fre quency of lt 20 GHz Output power is selected dir
108. ar panel Option 11 0 1 Hz Frequency Resolution Provides frequency resolution of 0 1 Hz 681XXC OM GENERAL INFORMATION 1 8 PERFORMANCE SPECIFICATIONS 681XXC OM PERFORMANCE SPECIFICATIONS Option 14 Rack Mounting without Chassis Slides Modifies rack mounting hardware to install unit in a console that has mount ing shelves Includes mounting ears and front panel handles Option 15A High Power Output Adds high power RF compo nents to the instrument providing increased RF output power in the 2 20 GHz frequency range Option 15A is standard in models hav ing a high end frequency that is gt 40 GHz Option 16 High Stability Time Base Adds an ovenized 10 MHz crystal oscillator with lt 5 x 10 day frequency stability Option 17 No Front Panel Deletes the front pane for usein re mote control applications where a front panel display or keyboard control are not needed Option 18 mmWave Module Bias Output Provides bias output for 54000 xWRxx Millimeter Wave Source M odules BNC Twinax connector rear panel Option 19 SCPI Programmability Adds GPI B command mne monics complying with Standard Commands for Programmable In struments SCPI Version 1993 0 SCPI programming complies with IEEE 488 2 1987 Option 22 0 1 Hz to 10 MHz Audio Frequency Adds frequency coverage below 10 MHz In models having a high end frequency of x20 GHz rated output power is reduced by 1 dB in models having a high end frequency of
109. area Q Modulation Status Areas T hese areas dis play ON or OFF toindicatethe status of signal modulation for the current setup Menu Labels Each of the menu soft keys located below and to the right of the display has a corresponding menu label area on the display These labels identify the func tion of the soft keys for the current menu display In 3 9 LOCAL FRONT PANEL OPERATION External FM Status off _ Sensitivity 1 H8mm MHz Eme Impedance 5 Source Mode Deviation CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL MODULATION SYSTEM 3 10 Menu Keys DATA DISPLAY AREA most cases when a menu soft key is pressed its menu label changes appearance to visually show the On Off condition Window Display A window display that overlays a portion of the cur rent menu display is used to 1 show the parameter being edited 2 display selection lists of preset fre quencies power levels markers etc 3 show the modulation and system configuration choices and current selections or 4 show self test error mes sages A typical window display is shown on the left As shown in Figure 3 2 there are two types of menu keys that surround the data display main menu keys and menu soft keys The main menu keys are positioned to the left of the data display The menu soft keys are located at the bottom and to the right of the data display Main Menu Keys Each o
110. art index stop index and dwell time and select a sweep trigger Editing the List Index Press List Index to open the list index parameter for editing Edit the current list index value using the cursor control key or rotary data knob or enter a new value using the key pad and any terminator key When you have finished setting the open pa rameter close it by pressing List Index or by mak ing another menu selection The List Index soft key is not the only way to change the list index In the list sweep mode with manual trigger selected each time the v pad of the cursor control key is pressed the list index incre ments or decrements by one The List Index soft key is used if a larger change in the list index is desired The only time the cursor control key will not change the list index is when different parameter such as frequency power level etc is open The cursor con trol key will then changethe value of the open parameter Once the open parameter is closed the cursor control key will again changethe list index 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM Editing the List SWEEP FREQUENCY OPERATION Performing List Calculations List soft key initiates a process that examines every index in the list and performs all the calculations necessary to set the frequency and power levels The soft key does not have to be pressed every time the list changes The instrument will pe
111. ating mode The AM status display will reflect your selection as XX dB V Log or XX V Linear Press Edit Sens to open the AM Sensitivity pa rameter then edit the current value using the cur sor control key or rotary data knob or enter a new value using the keypad and the appropriate termi nator key kHz us STEPS for Linear MHz ms dB for Log The AM Sensitivity range 15 0 to 100 V in Linear 0 dB V to 25 in Log close the open AM Sensitivity parameter press Edit Sens or make another menu selection Press 6000 500 to select the input impedance of theinput connector The AM status display will reflect your selection Press Front Rear to select the front panel or rear panel AM IN connector The AM status display will reflect your selection The signal generator has two FM operation modes Locked FM and Unlocked FM In Locked FM mode frequency modulation of the output signal is accomplished by summing the modulating signal into the FM control path of the YIG phase lock loop Maximum FM deviation is the lesser of x10 MHz or F mod x 300 for 1 kHz to 500 kHz rates In Unlocked FM mode the YIG phase lock loop is disabled to allow for peak FM deviations of up to 100 MHz There aretwo Unlocked FM modes U n locked Narrow and Unlocked Wide In Unlocked Narrow mode frequency modulation is obtained by applying the modulating signal to the fine tuning coil of the YI G tuned oscillator U n locked Narrow
112. ation AM FM or Square Wave and control the option settings for each type SYSTEM This menu provides you with ac cess to sub menus that let you 1 reset the in strument to factory selected default values 2 configure the front panel rear panel RF and GPIB 3 set incremental sizes for editing fre quency power level and time parameters 4 save or recall instrument setups 5 disable front panel data display 6 perform instru ment self test and 7 perform reference oscil lator calibration Main Menu Key Cursor With the exception of the EXE key when any main menu key is pressed the main menu that is displayed contains a cursor positioned adjacent to the pressed key Figure 3 2 The cursor is displayed on all sub menus of the current menu until a differ ent main menu key is pressed When the 1037 key is pressed the System menu is displayed The System menu and its sub menus do not contain a main menu key cursor Menu Soft Keys As shown on the left five menu soft keys are located below the data display and five menu soft keys are located to the right of the data display general the menu soft keys located below the data display select a sub menu of the current main top level menu display the menu soft keys located to the right of the data display either control a function on the current menu display or select an additional sub menu Menu labels that identify the current function of each soft key
113. base conse quently the 681XXC would continue to operate normally Error 110 The 100MHz Reference is not Locked to the High Stability 10MHz Crystal Oscillator Indicates the reference loop is not phase locked to the optional high stability 10 MHz crystal oscillator The reference loop may phase lock to the internal 100 MHz time base consequently the 681XXC would continue to operate normally 6 4 681XXC OM ERROR AND WARNING STATUS MESSAGES OPERATOR MAINTENANCE Table6 1 Sdf Test Error Messages 2 of 4 Error Message Description Remarks Error 111 Fine Loop Osc Failed Indicates one or more of the oscillators within the fine loop is not phase locked The 681 XXC is still operable but the accuracy and stability of frequency outputs are greatly reduced Error 112 Coarse Loop Osc Failed Indicates the coarse loop oscillator is not phase locked The 681 XXC is still operable but the accuracy and stability of the frequency outputs are greatly reduced Error 113 Yig Loop Osc Failed Indicates the YIG loop is not phase locked The 681 XXC is still operable but the ac curacy and stability of the frequency outputs are greatly reduced Error 114 Down Converter LO not Locked Indicates the local oscillator in the down converter assembly is not phase locked The 681 XXC is still operable but the accuracy and stability of frequency outputs be low 2 GHz is greatly reduced Error 115 Not Locke
114. be terminated in GHz MHz kHz or Hz however it is al ways displayed on the data display in GHz A time entry may be terminated in Sec ms us or ns however it is always displayed on the data display in Sec If you make an error during data entry either 1 press BACK SPACE to delete the entry one charac ter at a time starting from the last character en tered or 2 delete the entire entry by pressing CLEAR ENTRY Then reenter the correct value Now try entering a new value for the CW frequency displayed on your synthesizer using the data entry keypad and termination keys To close the open parameter when you are finished entering data press Edit 1 or make another menu selection 681XXC OM LOCAL FRONT PANEL OPERATION 3 7 CW FREQUENCY OPERATION NOTE When the signal generator is reset jt automatically comes up operating in the CW frequency mode 681 CW FREQUENCY OPERATION One of the signal generator s major functions is to produce discrete CW frequencies across the frequency range of the instrument The following paragraphs describe how to place the 681XXC in the CW frequency mode select CW frequency and power level for output and activate the CW ramp Use the CW Frequency Mode menu map Chapter 4 Figure 4 2 to follow the menu sequences SelectingCW To place the 681XXC in the CW frequency mode press the main menu key CW SWEEP SELECT At the resulting menu dis
115. calibration is attempted without an external 10 MHz reference signal connected to the rear panel 10 MHz REF IN connector the Calibration Status Menu displays the following External Reference connected 3 93 3 94 Chapter 4 Local Operation Menu Maps Table of Contents 4 1 4 3 4 2 MENU 5 4 3 4 1 intRopuction 4 2 MENU MAP DESCRIPTION 681XXC OM Chapter 4 Local Operation Menu Maps This chapter provides menu maps that support the 681XXC front panel operating instructions found in Chapter 3 It includes menu maps for all of the frequency power level and modulation modes of op eration addition a menu map for system configuration is also pro vided menu map shows the menu key selections and instrument menu dis plays for a particular mode of signal generator operation The menu displays are shown as they appear on the instrument are linked together to show the sequence of menu selection A brief description of the function of each menu s soft keys is provided If a menu soft key selects another menu then it is shown linked to that menu Figure 4 1 on page 4 5 is sample menu map annotated to identify the key elements The following is a list of the menu maps contained in this chapter Figure Title Page 4 1 4 5 4 2 CW Frequency ModeMenuMap
116. chassis Figure 2 3 Rack Mounting Hardwarelnstallation 681XXC OM 2 11 INSTALLATION gt 18 kg HEAVY WEIGHT 2 12 Step 10 Step 11 Step 12 Step 13 Step 14 Step 15 Step 16 RACK MOUNTING KIT INSTALLATION Place the right side inner slide assembly onto the instrument case with the handle towards the front of the instrument Insert two green headed screws through the holes in the slide assembly behind the handle and into the metric tapped holes in the side of the instrument Insert two green headed screws through the holes near the rear of the slide assem bly and into the metric tapped holes in the side of the instrument Insert the two SAE threaded screws moved from the feet through the 90 tabs on the rear of the slide assembly and into the rear panel of the instrument Using the Phillips screwdriver tighten all screws holding the right side slide assem bly to the instrument chassis With the appropriate hardware install the outer slide assemblies onto the equip ment rack Lift the signal generator into position Align the inner and outer slide assem blies and slide the instrument into the rack Realign the hardware as needed for smooth operation WARNING Use two more people to lift and move this equipment or use an equipment cart There 15 a risk of back injury if this equipment is lifted by one person 681XXC OM INSTALLATION 2
117. cification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 15dBm dBm dBm dB Maximum variation is 1 6 dB Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 15 dBm dBm dBm dB Maximum variation is 6 0 dB typical not a specification 681XXC OM 5 29 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Level Accuracy Flatness Test Record 12 of 27 Model 68137C w Option 15A Serial No Date Model 68137C with Option 15A High Power with Option 2F Step Attenuator Power Level Accuracy CW Frequency 5 0 GHz Set Power Measured Power 7 dBm dBm 6 dBm dBm 5 dBm 4 dBm dBm 3 dBm 2 dBm dBm 1 dBm dBm 0 dBm dBm 1 dBm dBm 2 dBm dBm 3 dBm dBm 4 dBm dBm 5 dBm dBm Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 7 dBm dBm dBm dB Maximum variation is 1 6 dB Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 7 dBm dBm dBm dB Maximum variation is 6 0 dB typical not a specification 5 30 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Leve Accuracy Flatness Test Record 13 of 27 Model 68147C Serial No Date Model 68147C without Option 2 Step Attenuator Power Level Accuracy Power Lev
118. clear the parameter entry BACK SPACE Key The BACK SPACE key is used to correct keypad data entry errors by deleting the last number or decimal point entered Terminator Keys The terminator keys are used to terminate keypad data entries and change the parameter values in memory If the entered valueis outsidethe allow able range of the open parameter an error message will be displayed along with an audible beep The terminator keys are as follows GHz Sec dBm MHz ms dB kHz us STEPS Hz ns ADRS 3 13 LOCAL FRONT PANEL OPERATION 3 5 INSTRUMENT START UP INSTRUMENT START UP Now that you have familiarized yourself with the layout of the signal generator s front panel controls and data display you are ready to be gin operating the instrument Begin by powering it up Powering Up the 681XXC Start Up Display Standby Operation LEVEL CONTROL MODULATION SYSTEM OPERATE LINE Lm STANDBY Line Key 3 14 Connect the 681XXC to an ac power source by fol lowing the procedure in the Installation chapter This automatically places the instrument in opera tion front panel OPERATE LED on During power up the message Please Wait LOADING PROGRAMS appears on the data display When all programs have been loaded the start up screen below is displayed It provides you with the model number of the signal generator and the revi sion level of the inst
119. cord the F requency Counter reading Step 5 Repeat step 4 until all frequencies listed on the test record have been recorded 681XXC OM OPERATION CW FREQUENCY VERIFICATION ACCURACY TEST Table 5 2 CW Frequency Accuracy Test Record for Standard Modds 1 of 3 Model 681 __ Serial No Date 68117C 68137C 68147C 1 000 000 000 2 000 000 000 2 000 000 000 5 000 000 000 4 000 000 000 8 000 000 000 6 000 000 000 11 000 000 000 8 000 000 000 14 000 000 000 17 000 000 000 20 000 000 000 2 000 001 000 2 000 001 000 2 000 002 000 2 000 002 000 2 000 003 000 2 000 003 000 2 000 004 000 2 000 004 000 2 000 005 000 2 000 005 000 2 000 006 000 2 000 006 000 2 000 007 000 2 000 007 000 2 000 008 000 2 000 008 000 2 000 009 000 2 000 009 000 2 000 010 000 2 000 010 000 Specification for all frequencies listed above is 100 Hz All frequencies are in GHz 681XXC 5 7 OPERATION CW FREQUENCY VERIFICATION ACCURACY TEST Table 5 2A CW Frequency Accuracy Test Record for Standard Modds 2 of 3 Model 681 __ Serial Date 68167C 68177C 2 000 000 000 2 000 000 000 5 000 000 000 6 000 000 000 8 000 000 000 10 000 000 000 11 000 000 000 14 000 000 000 14 000 000 000 18 000 000
120. current frequency parameter value using the cursor control key or rotary data knob or enter a new value using the key pad and approriate termination key Press Edit again to close the open frequency parameter When you are finished editing the slave frequencies press Previous Menu to return to the Master Slave Menu below The Master Slave menu lets you set the dF fre quency and L1 and L2 power level parameters for the Slaveunit Press Slave to open the dF frequency parame ter Press Slave L1 to open the main power level pa rameter Press Slave L2 to open the alternate sweep power level parameter Open the parameter you wish to change then edit the current value using the cursor control key or ro tary data knob or enter a new value using the key 681XXC OM USE WITH OTHER INSTRUMENTS Master Slave Operation with the master slave configura tion will not display markers Master Slave Operation in VNA Mode 681XXC OM MASTER SLAVE OPERATION pad and appropriate termination key When you have finished setting the open parameter close it by pressing its menu soft key or by making another menu selection Press Enable to begin master slave operation Press CW toreturn tothe CW Menu display During master slave operation the Slave unit is in remote mode under the direct control of the Master unit The Slave unit displays the following Its output CW frequency or sweep frequency ran
121. cy Accuracy Test Record for Models with Option 11 2 of 3 Model 681 C Serial Date Specification for all frequencies listed above is 10 Hz All frequencies are in GHz 68167C 68177C 2 000 000 000 0 2 000 000 000 0 5 000 000 000 0 6 000 000 000 0 8 000 000 000 0 10 000 000 000 0 11 000 000 000 0 14 000 000 000 0 14 000 000 000 0 18 000 000 000 0 17 000 000 000 0 22 000 000 000 0 20 000 000 000 0 26 000 000 000 0 23 000 000 000 0 30 000 000 000 0 26 000 000 000 0 34 000 000 000 0 29 000 000 000 0 38 000 000 000 0 32 000 000 000 0 42 000 000 000 0 35 000 000 000 0 46 000 000 000 0 38 000 000 000 0 50 000 000 000 0 40 000 000 000 0 2 000 000 100 0 2 000 000 100 0 2 000 000 200 0 2 000 000 200 0 2 000 000 300 0 2 000 000 300 0 2 000 000 400 0 2 000 000 4000 2 000 000 500 0 2 000 000 5000 2 000 000 600 0 2 000 000 6000 2 000 000 700 0 2 000 000 700 0 2 000 000 800 0 2 000 000 800 0 2 000 000 900 0 2 000 000 900 0 2 000 001 000 0 2 000 001 000 0 681 OM 5 11 OPERATION CW FREQUENCY VERIFICATION ACCURACY TEST Table 5 2B CW Frequency Accuracy Test Record for Models with Option 11 3 of 3 Model681 C Serial No Date Specification for all frequencies listed above is 10 Hz All frequencies are in GHz 68187C 68197C 2 000 000 000 0 2 000 000 000 0 6 000 000 00
122. cy Scaling Lets you set a reference mul tiplier value and apply it to all frequency parame ters The reference multiplier can be any value between 0 1 and 14 Changing the multiplier value changes the entered and displayed frequencies but it does not affect the output of the signal generator For example Frequency scaling set to 4 CW frequency set to 20 GHz 681XXC output frequency is 5 GHz 20 GHz 4 Press Freq Scaling to open the reference multiplier parameter then edit the current value using the cursor control key or rotary data knob or enter a new value using the data entry key pad and any ter minator key To dose the open multiplier parameter press Freq Scaling or make another menu selection Press Term RF Off to select 40 dB minimum of at tenuation when RF is switched off in units with a step attenuator Option 2 installed This provides a better output source match The display will reflect Yes toindicatethe 40 dB of attenuation is applied Press Term RF Off again to select 0 dB of attenua tion when the RF is switched off The display will reflect No to indicate 0 dB of attenuation is applied Press Previous Menu to return to the main Config ure RF Menu display 681XXC OM LOCAL FRONT SYSTEM PANEL OPERATION CONFIGURATION Configuring The GPIB configuration menus let you perform the the GPIB following Set the GPIB address and select the GPIB line terminator for the signal generator Turn on the
123. d Indicator Failed Indicates failure of the not phase locked indicator circuit The 681 XXC is still operable but an error message will not appear on the data display when the output frequency is not phase locked Error 116 FM Loop Gain Check Failed Indicates FM loop has failed or the loop gain is out of tolerance The 681 XXC is still operable but frequency accuracy and stability are degraded Error 117 Linearizer Check Failed Indicates a failure of the Linearizer DAC on the A12 PCB The 681 XXC is 511 operable but frequency accuracy of the RF output is degraded Error 118 Switchpoint DAC Failed Indicates a failure of the Switchpoint DAC on the A12 PCB The 681XXC will not produce analog sweeps but should operate normally in CW and step sweep modes Error 119 Center Frequency Circuits Failed Indicates a failure of the center frequency circuitry on the A12 PCB Do Not Attempt to Operate Refer the instrument to a qualified service technician Error 120 Delta F Circuits Failed Indicates a failure of the AF Width DAC on the A12 PCB The 681XXC will not generate AF analog sweeps but should produce AF step sweeps Error 121 Unleveled Indicator Failed Indicates failure of the not leveled detector circuitry on the A10 PCB The 681XXC is still operable but a warning message will not appear when the RF output goes unleveled Error 122 Level Reference Failed Indicates a failure of the level reference c
124. d Unlocked FM modes 50 Hz 15 kHz BW Frequency Range Unlocked Narrow FM Mode kHz RMS Unlocked Wide FM Mode kHz RMS 10 MHz to lt 20 GHz gt 20 GHz to lt 40 GHz lt 5 lt 10 lt 25 lt 50 gt 40 GHz to lt 65 GHz lt 20 lt 100 AM Noise Floor Typically lt 145 dBm Hz at 0 dBm output and offsets gt 5 MHz from carrier 681XXC OM B 3 PERFORMANCE SPECIFICATIONS RF OUTPUT Power level specifications apply at 25 10 C MAXIMUM LEVELED OUTPUT POWER Model Frequency Output Output Power with Output Power with Humber Range Power Step Attenuator Electronic Step GHz dBm dBm Attenuator dBm w Option 22 0 1 Hz to 10 MHz 13 0 11 0 9 0 68117C 0 01 to lt 8 4 13 0 11 0 9 0 68137C 2 0 to lt 20 0 13 0 11 0 3 0 68147C 0 01 to lt 20 0 13 0 11 0 3 0 0 01 10 2 0 13 0 11 0 Not 68167C gt 2 0 to lt 20 0 9 0 7 0 Available gt 20 0 to lt 40 0 6 0 3 0 0 01 to lt 2 0 12 0 10 0 gt 2 0 to lt 20 0 10 0 8 5 Not gt 20 0 10 lt 40 0 2 5 0 0 Available gt 40 0 to lt 50 0 2 5 1 0 0 01 to lt 2 0 12 0 10 0 gt 2 0 to lt 20 0 10 0 8 5 Not 68187C gt 20 0 to lt 40 0 2 5 0 0 Available gt 40 0 to lt 50 0 2 0 1 5 gt 50 0 to lt 60 0 2 0 2 0 0 01 lt 2 0 12 0 gt 2 0 to lt 20 0 10 0 68197C 220 0 to lt 40 0 42 5 41 gt 40 0 to lt 50 0 0 0 gt 50 0 to lt 65 0 2 0 With Option 15A High Power Install
125. d with option 2 step attenua tors the ALC and attenuator work in conjunction to provide leveled output power down to 140 dBm In the normal coupled leveling mode when the de sired power level is set the correct combination of ALC level and attenuator setting is determined by the instrument firmware some applications such as receiver sensitivity testing it is desireable to con trol the ALC level and attenuator setting separately by decoupling the step attenuator from the ALC The ALC mode menu lets you select attenuator decoupling At the ALC Mode menu press Atten Menu The Attenuator Menu below is displayed Analog Sw Fi Fz 8 88 dBm Atten 58 This menu lets you decouple the step attenuator from the ALC set the power level and set the at tenuation in 10 dB steps Press Decouple to decouple the step attenuator from the ALC Press Edit L1 to open the power level parameter for editing Edit the current level using the cursor con trol key or rotary data knob or enter a new value us ing the key pad and appropriate termination key When you have finished setting the power level press Edit L1 to dose the open parameter To change the attenuation setting press Incr Atten or Decr Attn Pressing these soft keys changes the attenuation in 10 dB steps Press Previous Menu to return to the ALC M ode Menu display 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM ALC Power Slope Powe
126. dex range of the displayed frequencies is shown at the top of the list Use the cursor control key to se lect a frequency from the list The selected fre quency is highlighted in reverse video and displayed in full below the frequency list Press Edit to edit the highlighted frequency or en ter a new frequency Press Page Up to scroll the displayed frequencies to the next 20 in thelist Press Page Down to scroll the displayed frequencies to the previous 20 in the list Press Previous Menu to return to the Edit List Menu display List Power Edit to gotothe List Power Edit Menu below from the Edit List menu press Edit Power This menu lets you scroll through the list power levels and edit selected power levels The menu displays a total of 10 power levels Use the cursor control key to select a power level from thelist The selected power level is highlighted in reverse video and displayed in full below the power level list 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM SWEEP FREQUENCY OPERATION Press Edit to edit the highlighted power level or en ter a new power level Press Page Up to scroll the displayed power levels to the next 10 in thelist Press Page Down to scroll the displayed power levels to the previous 10 in the list Press Previous Menu to return to the Edit List Menu display Additional Edit List Menu At the Edit List menu press More to go to the Ad ditional Edit List Menu below
127. e parameter s value increases or decreases by the set amount 681XXC OM LOCAL FRONT PANEL OPERATION When Linear power level units are selected use the following termina tor keys for power level data entries GHz Sec dBm for V MHz ms dB for mV kHz us STEPS for uV 681XXC OM DATA ENTRY AREA Rotary Data Knob The rotary data knob can be used to change the value of a parameter that is open for editing The cursor is moved under the open parameter using the and gt pads of the cursor control key Then by slowly turning the knob dockwise or counter clockwise the value of the parameter is increased or decreased by the unit size The unit sizeis deter mined by the cursor placement Turning the knob rapidly changes the value of the parameter in larger steps When editing frequency power level and time pa rameters the incremental size can be set to a spe cific value using the system configuration increment menu paragraph 3 13 Once set and activated each time the knob is turned clockwise or counter dockwise the param eter s value increases or de creases by the set amount KEYPAD The numeric keypad provides for entering fre quency power level time and number of steps pa rameters and GPIB address values The key functions as a change sign key during any keypad entry CLEAR ENTRY Key When a parameter is open for editing the CLEAR ENTRY key is used to
128. e 681XXC on the System Bus needs changing press GPIB Address Enter the new address using the cursor control key or the data entry keypad and the terminator key HZ ms ADRS The new GPIB address will appear on the display To change the data terminator press Line Term to select the correct GPIB data delimiter Toturn SS mode off press 55 The signal generator is now configured for 360B tracking mode operation Initiating 360B Tracking Mode Operations Turn on the 360B and configure it for tracking mode of operation Refer to the 360B VNA operation man ual Once configured the 360B should take control of the signal generator When the 360B takes control the display of all pa rameters on the 681XXC is disabled and the mes sages Secure Mode Active and Remote appear on the front panel display Terminating 360B Tracking Mode Operations Toterminate 360B VNA tracking mode operations you must first return the 681XXC tolocal control and then turn off the Secure mode Toreturn the 681XXC to local control turn off the 360B VNA On the 681XXC press KASUAN then Reset This turns off the Secure mode 681XXC OM 7 15 USE WITH OTHER INSTRUMENTS 7 5 USE WITH A HP8757D USE WITH A HP8757D SCALAR NETWORK ANALYZER The 681XXC signal generator is compatible with the Hewlett Packard
129. e signal generator is not being used it should be left connected to the power source and placed in standby This keeps the internal timebase frequency reference at operating temperature On the front panel press LINE to switch the 681XXC from OPERATE green LED on to STANDBY orange LED on NOTE During standby operation the fan runs continuously INSTALLATION 2 6 PREPARATION FOR USE Warmup Time From Standby When placing the 681XXC in op Operating Environment eration from stand by allow 30 minutes warmup to assure stable operation From Cold Start 0 C The signal generator re quires approximately 120 hours 5 days of warm up to achieve specified frequency stability with aging NOTE Instruments disconnected from AC power for more than 72 hours require 30 days to return to specified aging The 681XXC can be operated within the following environmental limits Temperature 0 C to 50 C Humidity 5 to 95 relative at 40 C Altitude up to 4600 meters Cooling Internal cooling is provided by forced airflow from the fan mounted on the rear panel Oooo CAUTION Before installing the 681XXC in its operating environment ensure that all airflow passages at the sides and rear of the instrument are clear This is of particular importance when ever the unit is being rack mounted Keep the cooling fan filter clean so that the ventilation holes are not obstructed A blocked fan
130. e the RF output signal Front or rear panel input 500 or 600 impedance both selectable from front panel modulation menu FM IN Accepts an external signal to FM modulate the RF output signal Front or rear panel input 500 or 6000 impedance both selectable from front panel modulation menu IN Accepts an external TTL compatible signal to pulse modulate the RF output signal Front or rear panel in put selectable from front panel modulation menu EXT ALC IN External ALC Input Provides for leveling the RF output signal externally with either a detector or power meter Signal requirements are shown in the RF Out put specifications on page B 5 RF OUTPUT Provides for RF output from 509 source impedance K or V Connector female Option 9 moves the RF Output connector to the rear panel 10 MHz REF IN Accepts an external 10 MHz 100 Hz 0 to 10 dBm time base signal Automatically disconnects the internal high stability time base option if installed 509 impedance 10 MHz REF OUT Provides a 0 5 Vp p AC coupled 10 MHz signal derived from the internal frequency standard 509 impedance HORIZ OUT Horizontal Sweep Output Provides OV at beginning and 10V at end of sweep for all sweep modes regardless of sweep width In CW mode the voltage is pro portional to frequency between OV at low end and 10V at the high end of range In CW mode if CW RAMP is en abled a repetitive OV to 10V ramp is provided 681XXC OM PERFOR
131. ectly in dBm on the front panel or via GPIB Rated RF output power is reduced Option 2B 110 dB Step Attenuator Adds a 10 dB per step attenuator with a 110 dB range for models having a high end fre quency of lt 40 GHz Output power is selected directly in dBm on the front panel or via GPIB Rated RF output power is reduced Option 2C 90 dB Step Attenuator Adds a 10 dB per step attenuator with a 90 dB range for models having a high end fre quency of lt 50 GHz Output power is selected directly in dBm on the front panel or via GPIB Rated RF output power is reduced Option 2D 90 dB Step Attenuator Adds 10 per step attenuator with a 90 dB range for models having a high end fre quency of lt 60 GHz Output power is selected directly in dBm on the front panel or via GPIB Rated RF output power is reduced Option 2E 120 dB Electronic Step Attenuator Adds a 10 dB per step electronic attenuator with a 120 dB range for models hav ing a high end frequency of lt 8 4 GHz Output power is selected di rectly in dBm on the front panel or via GPIB Rated RF output power is reduced Option 2F 120 dB Electronic Step Attenuator Adds a 10 dB per step electronic attenuator with a 120 dB range for models hav ing a high end frequency of lt 20 GHz Output power is selected di rectly in dBm on the front panel or via GPIB Rated RF output power is reduced Option 9 Rear Panel RF Output Moves the RF output connector tothe re
132. ed 0 01 to lt 2 0 13 0 11 0 11 0 BEDS 22 0 to 8 4 17 0 15 0 11 0 68137C 2 0 to lt 20 0 17 0 15 0 7 0 0 01 to lt 2 0 13 0 11 0 11 0 68147 gt 2 0 to lt 20 0 17 0 15 0 7 0 0 01 to lt 20 0 13 0 11 0 Not 6 gt 20 0 to 40 0 46 0 43 0 Available Note In models with Option 22 that have a high end frequency of x20 GHz rated output power is reduced by 1 dB In models with Option 22 that have a high end frequency of gt 20 GHz rated output power is reduced by 2 dB B 4 681XXC OM PERFORMANCE SPECIFICATIONS LEVELED OUTPUT POWER RANGE Standard Units Without an Attenuator Maximum leveled power to 15 dBm 20 dBm typical With an Attenuator Maximum leveled power to 120 dBm With an Electronic Attenuator Maximum leveled power to 140 dBm Units with Option 15A High Power Without an Attenuator Maximum leveled power to 5 dBm 10 dBm typical With an Attenuator Maximum leveled power to 115 dBm 120 dBm typical For units with a high fre quency limit gt 40 GHz and units with Option 15A mini mum settable power is 105 dBm 110 dBm typical With an Electronic Attenuator Maximum leveled power to 115 dBm 110 dBm typical UNLEVELED OUTPUT POWER RANGE typical Without an Attenuator gt 40 dB below max power With an Attenuator gt 130 dB below max power POWER LEVEL SWITCHING TIME to within specified accuracy Without Change in Step Attenuator 3 ms typical
133. ed by placing it in a window with a movable cursor under its digits Only one parameter can be open at a time If you press Edit L1 then the frequency parameter will dose and the power level parameter will open 681XXC OM LOCAL FRONT PANEL OPERATION Editing the Current Value Cursor Control Key Rotary Data Knob 681XXC OM ENTERING DATA To change the current value of a parameter by edit ing you can use either the cursor control key or the rotary data knob Using the Cursor Control Key Using the lt and gt pads of the cursor control key move the cursor under the digit where you want to begin editing Then increase or decrease the value of the parameter using the or v pad of the cursor control key The unit size of the increase or decrease that occurs each time the or pad is pressed is de termined by the cursor position Using the Rotary Data Knob You can also increase or decrease the value of the parameter using the rotary data knob Once you have positioned the cursor under the digit where you want to begin editing slowly turn the knob clockwise or counter d ockwise to increase or de crease the value of the parameter by the unit size Turning the knob rapidly changes the value of the parameter in larger steps Using a Set Increment When editing frequency power level and time pa rameters you can increase or decrease the parame ter s value by a set amount each time the
134. ed power level This status message indicates that a power slope correction has been applied to the ALC This status message indicates that a user level flatness correction power offset table has been applied to the ALC This status message indicates that the 681XXC has been placed in a source lock mode for operation with a 360B Vector Network Analyzer 681XXC OM 6 9 OPERATOR MAINTENANCE TROUBLESHOOTING 6 3 TROUBLESHOOTING Table 6 4 provides procedures for troubleshooting common malfunc tions encountered during operation of the signal generator Included are procedures for troubleshooting faults that do not produce error messages such as failure to power up and unexpected shutdown Table 6 4 Troubleshooting 1 of 3 Signal Generator will not turn on OPERATE light is OFF Normal Operation When the 681XXC is connected to the power source the OPERATE light should illuminate and the instrument should power up Step 1 Disconnect the 681XXC from the power source then check theline fuse on therear panel If the fuse is defective replace see page 6 14 If the fuse is good go tothe next step Step 2 Check to see if power is available at the power receptacle If not move to a working receptacle Q If power is available go to the next step Step 3 Check the power cable If defective replace a If good call a service technician Signal Generator will not turn on
135. eep Ramp menu below from Time the Analog Sweep menu press Sweep Ramp Level Li 8 00 dEm This menu lets you set the sweep time and gotothe trigger menu To open the sweep time parameter for editing press Sweep Time Edit the current sweep time using the cursor control key or the rotary data knob or enter a new sweep time using the key pad and appropriate termination key To close the open sweep time pa rameter once you have set the desired time press Sweep Time make another menu selection To goto the Analog Sweep Trigger menu from this menu press Trigger Menu Sweep trigger is de scribed on the next page Press Previous Menu to return to the Analog Sweep Menu display 681XXC OM 3 27 SWEEP FREQUENCY PANEL OPERATION LOCAL FRONT Selecting a Sweep Trigger 3 28 OPERATION There are three modes of sweep triggering provided for analog sweep and step sweep automatic exter nal and single The sweep trigger is selectable from the trigger menu The following is a description of each mode Auto Automatic The sweep continually sweeps from its start frequency to its stop fre quency with optimal retrace time External The sweep recurs when triggered by an external TTL compatible clock pulse to the rear panel AUX I O connector Single A single sweep starts when the trigger key is pressed If a sweep is in progress when the key is pressed it aborts and resets To go to the Sw
136. eep Trigger M enu below from the Analog Sweep Ramp menu press Trigger Menu To select a sweep trigger mode press its menu soft key A message showing the sweep trigger mode se lected appears the right side of frequency title bar When you are finished press Previous Menu to return to the Analog Sweep Ramp Menu display If you select the single sweep trigger mode the menu display adds the menu soft key Trig Press ing Trig starts a single sweep If a single sweep is in progress pressing Trig causes the sweep to abort and reset EAnalog Sweep 3 Sinale 1 GHG HEB B GHz B 681XXC OM LOCAL FRONT PANEL OPERATION Step Sweep Mode Selecting Step Sweep Mode Setting Step Size Dwell Time and Sweep Time 681XXC OM SWEEP FREQUENCY OPERATION In step sweep frequency mode the output frequency changes in discrete synthesized steps between selected start and stop frequencies Step sweeps can be from a low frequency toa high frequency or from a high frequency to a low frequency Step sweeps can be selected to be linear or logarithmic Sweep width can be set from 1 kHz 0 1 Hz with Option 11 to the full frequency range of the instrument The step size or number of steps between the start and stop frequencies the dwell time per step the sweep time and the type of step sweep linear or logarithmic and sweep trigger are controllable from step sweep menus To place the 681
137. el Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 13 dBm dBm 13 dBm dBm 12 dBm dBm 12 dBm dBm 11 dBm dBm 11 dBm dBm 10 dBm dBm 10 dBm dBm 9dBm dBm 9dBm dBm 8 dBm dBm 8 dBm dBm 7 dBm dBm 7 dBm dBm 6 dBm dBm 6 dBm dBm 5 dBm dBm 5 dBm dBm 4 dBm dBm 4 dBm dBm 3 dBm dBm 3 dBm dBm 2 dBm dBm 2 dBm dBm 1 dBm dBm 1 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 13 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 20 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 13 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 2 0 dB 0 05 to 20 GHz typical not a specification 681XXC OM 5 31 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Level Accuracy and Flatness Test Record 14 of 27 Model 68147C Serial No Date Model 68147C with Option 2A Step Attenuator Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 11 dBm dBm 11 dBm dBm 10 dBm dBm 10 dBm dBm 9dBm dBm 9dBm dBm 8dBm dBm 8dBm dBm 7dBm dBm 7 dBm dBm 6 dBm dBm 6 dBm dBm 5 dBm dBm 5 dBm 4dBm dBm 4dBm dBm 3 dBm dBm 3 dBm d
138. eling Modes 4 14 List Sweep Frequency Made 4 10 Manual Sweep Frequency Mode 4 9 Sample Menu Map 4 5 Square Wave Modulation Mode 4 17 Step Sweep Frequency M ode 4 8 Sweep F requency Step Power Mode 4 13 System Configuration 4 18 Messages Error 6 3 6 8 Status 6 9 Warning 6 9 Models List of 1 4 Modulation Modes AM Mode 3 73 FM Mode 3 73 Index 2 EO Square Wave Modulation M ode 3 73 O Operating Environment 2 6 Operational Verification Tests 5 3 Operator Maintenance Error and Warning Status Messages 6 3 Routine Maintenance 6 13 Troubleshooting 6 10 Options List of 1 6 P Performance Specifications 1 7 B 1 Power Level Accuracy and Flatness Tests Accuracy Test Procedure 5 14 Flatness Test Procedure 5 15 Test Records 5 19 5 45 Test Setup 5 13 Power Level Control Selecting a Preset Sweep Range 3 57 Setting a Preset Sweep Range 3 57 Power Level Modes CW Power Sweep Mode 3 53 Sweep F requency Step Power Mode 3 53 Power Requirements 2 4 Preparation for Storage Shipment 2 13 Preparation for Use 2 4 Line Voltage Selection 2 4 Operating Environment 2 6 Power Requirements 2 4 Standby Operation 2 5 Warmup Time 2 6 R Rear Panel Connectors A 1 Recommended Test Equipment 1 8 Reference Oscillator Calibration 3 92 S Saving Recalling Instrument Setups 3 89 Scope of Manual 1 3 Secure Operation 3 91 Self Test Error Messages 6 3 6 7 From System Menu 3
139. ency Control Menu below is displayed dBm FM d Press Full to select a full range fre quency sweep e Press Edit to open the current power level parameter for editing f Set L1 tothe power level noted on the test record OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS 9 Now return to the Step Sweep menu by pressing the main menu key CW SWEEP SELECT h At the Step Sweep menu press Sweep Ramp to goto the Step Sweep Ramp Menu below o e t H E 1 i Press Dwell Time to open the dwell time per step parameter for editing j Setthe dwell time to 1 second NOTE Monitor the 681XXC s Horizontal Output on the Oscilloscope to de termine sweep start and stop Step2 Asthe681XXC steps through the full fre quency range measure the maximum and minimum Power Meter readings and rec ord the values on thetest record Verify that the variation difference between the maximum and minimum readings does not exceed the value noted on the test rec ord 5 16 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Step3 Set up the 681XXC as follows for an ana log sweep power level flatness test a Reset the instrument by pressing a then Reset The CW Menu is displayed b Press Analog to place the 681XXC the analog sweep frequency mode and display the Analog Sweep Menu c With the Analog Sweep menu dis played press the main
140. ency mode operation by selecting the de sired frequency modeon Master instrument 681XXC OM MASTER SLAVE OPERATION Connect the Master instrument RF OUT PUT and the Slave instrument RF OUT PUT to the appropriate connections on the DUT Step 4 The following paragraphs describe how to set up both instruments to perform master slave opera tions Use the CW Frequency Mode menu map Chapter 4 Figure 4 2 to follow the menu se quences initiate master slave operation turn on both instruments and place them in CW mode The CW Menu below is displayed On the Master instrument press Master Slave to go to the Master Slave Menu display below This menu lets you perform the following Gotothe Slave Frequencies List menu Set the dF frequency for the Slave unit Set the Slave unit s main power level L1 Set the alternate sweep power level 12 for the Slave unit Turn master slave operation on and off Press Slave Fregs to go to the Slave requencies List Menu display next page USE WITH OTHER INSTRUMENTS NOTE Upon reset the slave frequencies FO F9and 9 return tothe i default values shown here MASTER SLAVE OPERATION Fa 3 5 This menu lets you edit the listed frequencies for the Slave instrument Use the cursor control key to select a frequency pa rameter from the list then press Edit to edit its value Edit the
141. ep Range SWEEP FREQUENCY OPERATION Selecting a sweep range involves choosing a start and a stop frequency for the frequency sweep The Sweep range selection process is identical for the analog sweep step sweep and manual sweep fre quency modes You can select a frequency sweep range as follows Editing the current start and stop frequency parameter values Entering new start and stop frequency pa rameter values Selecting one of the preset sweep range rameters F1 F2 F3 F4 F5 dF or F6 dF Editing the Current Start Stop Frequencies To edit the current sweep range open either the start or stop frequency parameter the display above Edit F1 opens the start frequency parame ter Edit F2 opens the stop frequency parameter Edit the open frequency parameter using the cursor control key or the rotary data knob When you are finished close the open parameter by pressing its menu edit soft key or by making another menu se lection Entering New Start Stop Frequencies To enter a new frequency sweep range open either the start or stop frequency parameter press Edit F1 or Edit F2 Enter a new frequency using the keypad and appro priate terminator key When you are finished close the open parameter by pressing its menu edit soft key or by making another menu selection 3 33 LOCAL FRONT PANEL OPERATION 3 34 SWEEP FREQUENCY OPERATION Selecting a Preset Sweep Range There are
142. equency N A Edit Start Frequency Edit End Frequency Edit Current Power Level Figure 4 4 Step Sweep Frequency Mode Menu Map 4 8 NOTE Refer to Chapter 3 paragraph 3 8 for Step Sweep Frequency Mode operating instructions 681XXC OM LOCAL OPERATION MANUAL SWEEP MAPS FREQUENCY MODE EU SELECT Edit Start Frequency Edit End Frequency Edit Step Size F2 L1 0 00 dBm Edit Number of Steps MODULATION _______________________ SYSTEM Ed SELECT gt a INTROL F2 1 SELECT Li 0 00 dBm LEVEL Power Level H EINE Edit Start Frequency Edit End Frequency x NOTE Refer to Chapter 3 paragraph 3 8 for Manual Sweep F requency M ode operating instructions Figure 4 5 Manual Sweep Frequency ode Menu Map 681XXC OM 4 9 LOCAL OPERATION LIST SWEEP MAPS FREQUENCY MODE Edit Highlighted men Emm E Edit Index Frequency 3 5 Press To Display Next PEAS 5 219 5 2H 20 Frequencies On List Press To Display Previous 20 Frequencies On List Edit Highlighted Index Power Level Press To Display Next 2 10 Power Levels On List Press To Display Previous 10 Power Levels On List Analog Insert Default Frequency And Power Level at Current List Index
143. es EI sage has been placed on the line Data Valid A low true state indicates that the active talker has 1 sensed that 6 DAV is high false and NDAC is low true 2 placed the data byte on the bus and 3 waited an appropriate length of time for the data to settle 7 NRFD Not Ready For Data A high false state indicates that all active listeners are ready to accept new data 8 NDAC Not Data Accepted A low true state indicates that all addressed listeners have accepted the current data byte for internal processing 9 IFC Interface Clear low true state places all bus instruments in a known quiescent state unaddressed to talk unaddressed to listen and service request idle 10 SRQ Service Request A low true state indicates that a bus instrument desires the im mediate attention of the controller Attention A low true state indicates that the bus is in the command mode data 11 ATN lines are carrying bus commands A high false state indicates that the bus is in the data mode data lines are carrying device dependent instructions or data 12 Shield Chassis Ground 13 16 DIOS thru 2106 Data Input Output Bits are HIGH when the data is logical 0 and LOW when the data is logical 1 17 REN Remote Enable A low true state enables bus instruments to be operated re motely when addressed 18 24 GND Logic Ground FigureA 3 Pinout Diagram EEE 488 GPIB Connector A 6 681XXC OM Appendix B Performance Specifications
144. est and resetting it to the factory default parameters Power Up Self Test Resetting the 681XXC Warmup Time First verify that the rear panel line voltage selector is set for the correct line voltage then connect the 681XXC to the power source This automatically places the signal generator in operation front panel OPERATE LED on During power up the signal generator loads its op erating program then returns to the exact setup it was in when last turned off Next perform a self test of the 681XXC toinsure proper operation of the instrument PCBs and other internal assemblies To self test the signal generator press 103911 then press Selftest When the self test is complete the instrument displays the main CW menu NOTE Error conditions detected during self test are displayed as error messages on the data display They should be corrected be fore continuing Refer to Chapter 6 for a listing of error messages and descriptions The signal generator should be reset to the factory selected default parameters before commencing op eration verification testing To reset the 681XXC first press KASHANI then press Reset The signal generator resets to the CW frequency mode and displays the CW Menu When the signal generator is turned on allow one hour of warmup time before performing operational verification testing This will assure stable opera tion of the instrument 681XXC OM OPERATION CW FREQUENCY
145. ettable markers 9 and MO M9 that can be used in the analog and step sweep frequency modes for precise frequency identification Marker frequency accuracy is the same as sweep frequency accuracy The markers are visible on a CRT display The 681XXC generates two types of markers Q Video Marker produces a pulse on a CRT display at each marker frequency The video marker is either a V a 5V pulse at the rear panel The polarity of the video marker pulse is selectable from a system configuration menu Q Intensity Marker produces an intensified dot on a CRT display at each marker fre quency They are obtained from a momentary dwell during the sweep at each marker fre quency Intensity markers are only available in the analog sweep frequency mode at sweep times of 1 second To output markers during a sweep you must first se lect tag the marker frequencies from the Marker List menu then turn on the marker output To goto the Marker List menu from an analog or step sweep frequency menu press FREQUENCY CONTROL The Sweep Frequency Control Menu below is dis played To goto the Marker List menu from this menu press Marker List The Marker List Menu next page is displayed This menu lets you tag or edit marker list frequencies and turn the markers on off 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM SWEEP FREQUENCY OPERATION Use the cursor control key to select a frequency parameter from
146. evel Flatness Step Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 8 4 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 05 to 8 4 GHz typical not a specification 5 20 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Leve Accuracy and Flatness Test Record 3 of 27 Model 68117C Serial No Date Model 68117C with Option 2E Step Attenuator Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 9 dBm dBm 9 dBm dBm 8 dBm dBm 8 dBm dBm 7 dBm dBm 7 dBm dBm 6 dBm dBm 6 dBm dBm 5 dBm dBm 5 dBm dBm 4 dBm dBm 4 dBm dBm 3 dBm dBm 3 dBm dBm 2 dBm dBm 2 dBm dBm 1 dBm dBm 1 dBm dBm 0 dBm dBm 0 dBm dBm dBm dBm 1 dBm dBm 2 dBm dBm 2 dBm dBm 3 dBm dBm 3 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 9 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 8 4 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 9 dBm dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 05 to 8 4 GHz typ
147. ex Telephone 016 09 21 550 FAX 016 44 61 065 GERMANY ANRITSU GmbH Grafenberger Allee 54 56 D 40237 Dusseldorf Germany Telephone 0211 968550 FAX 0211 9685555 INDIA MEERA AGENCIES P LTD 23 Community Center Kailash Colony Extension New Delhi India Telephone 91 11 6442700 FAX 91 11 6442500 ISRAEL TECH CENT LTD 4 Raul Valenberg St Tel Aviv 69719 Telephone 03 64 78 563 FAX 03 64 78 334 ITALY ANRITSU Sp A Roma Office Via E Vittorini 129 00144 Roma EUR Telephone 06 50 99 711 FAX 06 50 22 4252 KOREA ANRITSU CORPORATION LTD 8F Seocho Dong Secho Ku Seoul 137 070 South Korea Telephone 2 581 6603 FAX 2 582 6603 JAPAN ANRITSU CUSTOMER SERVICE LTD 1800 Onna Atsugi shi Kanagawa Prf 243 Japan Telephone 0462 96 6688 FAX 0462 25 8379 SINGAPORE ANRITSU SINGAPORE PTE LTD 6 New Industrial Road 06 01 02 Hoe Huat Industrial Bldg Singapore 536199 Telephone 282 2400 FAX 282 2533 SOUTH AFRICA ETECSA 12 Surrey Square Office Park 330 Surrey Avenue Ferndale Randburt 2194 South Africa Telephone 011 27 11 787 7200 FAX 011 27 11 787 0446 SWEDEN ANRITSU AB Botivid Center Fittja Backe 13A 145 84 Stockholmn Telephone 08 534 707 00 FAX 08 534 707 30 TAIWAN ANRITSU LTD 6F No 96 Section 3 Chien Kuo N Road Taipei Taiwan R O C Telephone 02 515 6050 FAX 02 509 5519 UNITED KINGDOM ANRITSU LTD 200 Capabili
148. f possible error mes sages that can be displayed during normal opera tions Table 6 3 is a summary list of possible warning status messages Table 6 2 PossibleError Messages during Normal Operations Error Message Description Displayed on the frequency mode title bar when 1 the output frequency is not phase locked or 2 an invalid entry causes a frequency range error LOCK ERROR Displayed in the frequency parameters area when the output frequency is not phase locked The frequency accuracy and stability of the RF output is greatly reduced Normally caused by an internal component failure Run self test to verify malfunction Displayed in the frequency parameters area when 1 the analog sweep start frequency entered is greater than the stop frequency 2 the dF value entered results in a sweep outside the range of the instrument 3 the step size value entered is greater than the sweep range 4 the number of steps entered results in a step size of less than 1 kHz 0 1 Hz with Option 11 or 0 1 dB 0 001 mV or 5 the step sweep time entered divided by the number of steps entered does not result in a dwell time of lt 10 ms Entering valid values usually clears the error Displayed in the modulation status area when either the external AM modulating signal or the external FM modulating signal exceeds the input voltage range In ad dition the message Reduce AM FM Input Level ap pears at the
149. f the main menu keys shown on the left se lects a main top level menu display These menus let you select the operating mode operating pa rameters and configuration of the instrument A brief functional description of each main menu fol lows CW SWEEP SELECT This menu lets you select between CW Analog Step Manual and List Sweep frequency modes FREQUENCY CONTROL In CW frequency mode this menu lets you select the CW fre quency parameter F 0 F 9 or 9 to use In the Analog Step or Manual Sweep frequency mode this menu lets you select the sweep range parameters Full F 1 F 2 F3 F 4 F5 dF or F6 dF to use In Analog or Step Sweep fre quency mode the menu also lets you select up to 20 independent pre settable frequency markers LEVEL ALC SELECT This menu lets you select power level and ALC modes Level Level Sweep Level Offset ALC on or off inter nal or external ALC ALC attenuator decou pling ALC slope and user level flatness cor rection LEVEL CONTROL In Level mode this menu lets you select the level parameter LO L9 to use for a CW frequency or a frequency 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM DATA DISPLAY AREA sweep the Level Sweep mode this menu lets you select the power sweep range parame ters to use MODULATION This menu provides you with access to sub menus that let you select thetype of signal modul
150. filter can cause the instru ment to overheat and shut down 681XXC OM INSTALLATION 2 4 GPIB SETUP AND INTERCONNECTION 681XXC OM GPIB SETUP AND INTERCONNECTION The 681XXC provides automated microwave signal generation via the GPIB The following paragraphs provide information about interface connections cable requirements setting the GPIB operating parame ters and selecting the external interface language Interface Connector Cable Length Restrictions GPIB Inter connection Setting the GPIB Address Interface between the signal generator and other de vices on the GPIB is via a 24 wire interface cable This cable uses connector shells having two connec tor faces These double faced connectors allow for the parallel connection of two or more cables toa single device Figure 2 1 shows the location of the rear panel GPIB connector The GPIB can accommodate up to 15 instruments at any onetime To achieve design performance on the bus proper timing and voltage level relationships must be maintained If either the cable length be tween separate instruments or the cumulative cable length between all instruments is too long the data and control lines cannot be driven properly and the system may fail to perform Cable length restric tions are as follows Nomorethan 15 instruments may be installed on the bus Total cumulative cable length in meters may not exceed two times the number of bus instru men
151. for recall The GPIB power meters supported are the Anritsu Models ML2437A ML2438A and ML4803A and the H ewlett Packard Models 437B 438A and 70100A GPIB 681XXC SIGNAL GENERATOR Fem oO mm ma oom um RF z mE OUTPUT INPUT EU ribi POWER SWITCH MATRIX GPIB METER AMPLIFIERS 6 COUPLERS ETC ERE si pem CORRECTED OUTPUT DEVICE UNDER 4 4 TEST POWER SENSOR Figure 3 4 Setup for Creating a Power Offset Table User Levd Flatness Correction 681XXC OM 3 67 LOCAL FRONT PANEL OPERATION 3 68 LEVELING OPERATIONS Equipment Setup To create a power offset table for user level flatness correction connect the equipment shown in Figure 3 4 as follows Step 1 Using a GPIB cable connect the Power Meter to the 681XXC Step 2 Calibrate the Power Meter with the Power Sensor Step 3 Connect the Power Sensor to the point in the test setup where the corrected power level is desired Power Meter Model and GPIB Address order for the 681XXC to control the power meter the GPIB address and power meter model must be selected from the Configure GPIB menu Press RASAN to go to the System Menu display At the System Menu display pres
152. from both the internal and external sources Press At the resulting menu dis play press SqWave The Square Wave Status Menu below is displayed Folaritu Source This menu contains the square wave status window that shows the current menu selections This menu lets you perform the following Turn square wave modulation on off Select Internal or External source for the modulation signal Select the polarity of the signal High or Low that turns the RF on Gotoan additional menu to select the fre quency from the internal source or to select the front or rear panel input connector 681XXC OM 3 77 LOCAL FRONT PANEL OPERATION 3 78 SIGNAL MODULATION Press On Off turn square wave modulation and off Both the Square Wave status display and the Square Wave modulation status area will reflect your selection Press Internal External to select the source of the modulating signal If you select Internal the status display shows Source as Internal and Frequency lists the actual source frequency If you select E xter nal the display shows Frequency as Ext external and Source as Front or Rear to indicate which input connector is selected Press L RF On H RF On to select the polarity of the signal that triggers the RF on Press More to gotothe additional menu Internal Source Frequency Selection If you have selected Internal to use the modulating signal from
153. fting up the rubber covering at each end of the handle j 26 in Rear Feet 4 Carrying Handle Figure2 2 Front Handle Fed and Carrying Handle Removal 2 10 681XXC OM RACK MOUNTING KIT INSTALLATION The screws with green heads have metric threads When it becomes necessary to replace any of these screws always use the exact re placement green headed screws Anritsu P N 2000 560 to avoid damage to the instrument Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 INSTALLATION Remove the inner slide assemblies from the outer slide assemblies Placethe left sideinner slide assembly onto the instrument case with the handle towards the front of the instrument Fig ure 2 3 Insert two green headed screws through the holes in the slide assembly behind the handle and into the metric tapped holes in the side of the instrument Insert two green headed screws through the holes near the rear of the slide assem bly and intothe metric tapped holes in the side of the instrument Insert the two SAE threaded screws re moved from the feet through the 90 tabs on the rear of the slide assembly and into the rear panel of the instrument Using the Phillips screwdriver tighten all screws holding the left side slide assem bly to the instrument
154. g a Power Level Sweep Range NOTE When Linear power level sweep is selected use the following termina tor keys for power level data entries GHz Sec dBm for V MHz ms dB for mV kHz us STEPS for uV 3 56 POWER LEVEL SWEEP OPERATION Selecting a power level sweep range consists of choosing a start and stop level for the power level sweep The power level sweep range selection pro cess is identical for all power level sweep modes CW power sweep analog sweep frequency step power and step sweep frequency step power You can select a power level sweep range as follows Edit the current start and stop power level parameter values Enter new start and stop power level parame ter values Select one of the preset power level sweep range parameters L1 L2 L3 L4 L5 L6 L7 L8 or 19 10 L F 3 588 m aas GHz Editing the Current Start Stop Power Levels To edit the current power level sweep range start by opening either the start or stop power level pa rameter the display above Edit L1 opens the start power level parameter Edit L2 opens the stop power level parameter Edit the open power level parameter using the cur sor control key or the rotary data knob When you are finished close the open parameter by pressing its menu edit soft key or by making another menu selection Entering New Start Stop Power Levels To enter a new power level sweep range start by
155. ge Its output power level The messages Remote and Local Lockout The CW sweep frequency settings on the Master unit define the master sweep and the corresponding frequency settings on the Slave unit define the slave sweep For example if slave frequency F 1 is set to 4 GHz and slave frequency F2 is set to 12 GHz then the Slave unit will sweep from 4 to 12 GHz when ever the F 1 F 2 sweep range is selected on the Mas ter unit The Master unit will sweep from F 1 F 2 with the values of 1 and F2 defined in the Master unit s frequency list In the mode of master slave operation a Slave unit is coupled to a Master instrument that is con nected to a Model 3608 Vector Network Analyzer in a source or dual source configuration Operating in structions for the vector network analyzer can be found in the Model 360B VNA Operation Manual P N 10410 00110 The following paragraphs de scribe how to set up both instruments to perform master slave operations in the VNA mode Place both instruments in CW mode Then on the Master unit press Master Slave to goto the Master Slave Menu display page 7 5 At the Master Slave menu press Slave to go to the Slave Frequencies List Menu display next page USE WITH OTHER INSTRUMENTS During master slave operations in mode this error message 15 displayed on the Master instrument when the slave offset value entered results in CW fre
156. ge 3 41 Use the Analog Sweep Step Sweep Manual Sweep and List Sweep Frequency Mode menu maps Chapter 4 Figures 4 3 4 4 4 5 and 4 6 to follow the menu sequences Analog Sweep n analog sweep frequency mode the signal genera Mode tor s output frequency is swept between selected start and stop frequencies Sweep width can be set from 1 MHz tothe full frequency range of the signal generator Sweep time can be set for any time in the range of 30 ms to 99 sec The lower frequency limit for analog sweeps is 10 MHz When the sweep width of the analog sweep is 2100 MHz the sweep is phase lock corrected at both the start and stop frequencies and at each band switch point When the sweep width is lt 100 MHz only the center frequency of the sweep is phase lock corrected Selecting To place the 681XXC in analog sweep frequency Analog Sweep mode press the main menu key Mode CW SWEEP SELECT At the resulting menu display press Analog The Analog Sweep Menu below is then displayed Analog Sweep F1 2 888 GEE Bee B GHz Fz BEE aad B 2 26 681XXC OM LOCAL FRONT SWEEP FREQUENCY PANEL OPERATION OPERATION This menu lets you perform the following Select a sweep range edit the sweep start and stop frequency parameters Gotothe sweep ramp menu set the sweep time and select a sweep trigger Select an output power level for the sweep Gotothe alternate sweep menu Setting Sweep TogototheAnalog Sw
157. he 681XXC accepts 90 to 132 Vac line voltage When the switch is set to 220 Vac the 681XXC accepts 180 to 264 Vac line voltage If the selector setting is in correct for the line voltage available change it to the correct setting Whenever the selector setting is changed the line fuse must be changed to the correct value for the line voltage selected Line fuse values for the line voltages are printed on the rear panel next to the fuse holder WARNING When supplying power to this equipment always use three wire power cable connected to a three wire power line outlet If power is supplied without grounding the equip ment in this manner there is a risk of receiving a severe fatal electric shock Power Connection Connecting the 681XXC to line power automatically places it in operation front panel OPERATE LED on To connect it to the power source plug the fe male end of the power cable into the input line volt age receptacle on the rear panel Figure 2 1 Then plug the male end of the power cord into a three wire power line outlet 681XXC OM INSTALLATION PREPARATION FOR USE Line Fuse gt 2 2 Line Voltage Selector Switch GPIB Connector LEVEL CONTROL MODULATION SYSTEM OPERATE LINE 1 STANDBY Line Key 681XXC OM Figure 2 1 Standby Operation Signal Generator Rear Pand showing Power Connection Whenever th
158. he reference oscillator calibration function lets you calibrate the internal 100 MHz crystal reference oscillator of the 681XXC using an external 10 MHz 0 to 10 dBm reference signal NOTE Before beginning calibration always let the 681XXC warm up for a minimum of 120 hours To perform calibration of the internal reference os cillator first connect the external 10 MHz reference signal to the 681XXC rear panel 10 MHz REF IN con nector Next press the main menu key At the System Menu display press Cal Menu to gotothe Calibration Menu below Press Refrnce Cal to begin calibration Press Previous Menu to return to the System M enu display When Refrnce Cal is pressed the Calibration Status Menu below is displayed alibratiaon This rus permanent lu change m calibration Proceed or Abort Press Proceed to start the calibration Press Abort to cancel the calibration and return to the Calibration Menu display 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM REFERENCE OSCILLATOR CALIBRATION When Proceed is pressed the date parameter opens for data entry Enter late 032799 Using the key pad enter the current date in any desired format Then press any teminator key The Calibration Status Menu display changes to indicate calibration is in progress When the reference calibration is complete the Cali bration Menu is displayed External Reference Not Connected If
159. he rotary data knob or the and v touch pads will increment or decrement the digit position over the cursor Keypad entries are terminated by pressing the appropri ate unit key GHz Sec dBm MHz ms dB kHz us STEPS or Hz ns ADRS Edits are terminated by exiting the edit menu Reset Returns all instrument parameters to predefined de fault states or values Any pending GPIB I O is aborted Se lectable from the system menu Master Slave Operation Allows two output signals 68XXXB C to be swept with a user selected frequency off set One instrument controls the other via AUX I O and SE RIAL I O connections Requires a Master Slave Interface Cable Set Part No ND36329 User Level Flatness Correction Allows user to calibrate out path loss due to external switching and cables via en tered power table from a GPIB power meter or calculated data When user level correction is activated entered power levels are delivered at the point where calibration was per formed Supported power meters are Anritsu ML2437A ML2438A and ML4803A and HP 437B 438A and 70100A Five user tables are available with up to 801 points table B 7 PERFORMANCE SPECIFICATIONS Warm Up Time From Standby 30 minutes From Cold Start 0 C 120 hours to achieve specified frequency stabiltiy with aging Instruments disconnected from ac line power for more than 72 hours require 30 days to return to specified fre quency stability withaging Power 90 13
160. i 2 000 666 666 0 GHz 0 00 dBm Previous NE OF TE OF O F F Config Rear Panel ELO teen Pen Lift Relay Contacts eet z _ Select 5V or 5V level for Video Markers Select RF On or Off M During Retrace RE a ES Config RF Select RF On Off During Frequency 0211222 RF RF Switching In CW Step and List Modes vc Rest Select Rest For Single Sweep 0 For Bottom of Sweep Ramp 10 For Top of Sweep Ramp Select RF On or Off at Reset Set Reference Multiplier Select 40 dB or 0 dB Attenuation When RF Switched Off Units With Option 2 Only um Config RF aL State Reset State Fre C Freq Scaling Previous OF OF Menu c GPIB ressj Select GPIB Address Bet GPIB Address HP8757D Scalar Mode On Off Terminate mu Select CR or Line Terminator REM Meter Address 13 Select Power Meter Type OFF 55 Select Interface Language SS Mode On Off apr Option 19 Only gt He NE OF 7 Previous Of 0 0 Menu Increment Mode On Off Set Frequency Increment NOTE Refer to Chapter 3 paragraph 3 13 for System Configuration operating instructio
161. ibed in the following paragraphs When operating in source lock mode the 360B phase locks the frequency output of the 681XXC This is accomplished by sending a dc control voltage tothe FM input on the 681XXC Duetothe inherent resolution of the 360B s synthesized local oscillators frequency resolution is limited to 100 kHz intervals Source Lock Mode Configuration In order for the 681XXC to operate with a 360B source lock mode the signal generator must be placed in the SS Mode of operation To place the signal generator in SS Mode first press the main menu key 81031 At the System Menu display press Config The System Configuration Menu below is displayed Fi 2 888 man map A GHz 681XXC OM USE WITH OTHER INSTRUMENTS When SS Mode is selected on this message is displayed in the fre quency mode title bar on all menu displays to remind the operator that the 681XXC a source lock mode A 360B VNA and a 68137C Source in SS Mode should not be operated below 2 1 GHz becauseit may fail to lock 3608 VNA that is using a 3612A 3613A 3622 3623A or 3631A Test Set anda 681XXC Sourcein 55 Mode should not be operated above 60 GHz because it will fail to lock For operations above 60 GHz the 681XXC Source in tracking mode 681XXC OM USE WITH A 360B VECTOR NETWORK ANALYZER At the System Configuration menu
162. ical not a specification 681XXC OM 5 21 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Accuracy Flatness Test Record 4 of 27 Model 68117 w Option 15A Serial No Date Model 68117C with Option 15A High Power without Option 2 Step Attenuator Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 13 dBm dBm 17 dBm dBm 12 dBm dBm 16 dBm dBm 11 dBm dBm 15 dBm dBm 10 dBm dBm 14 dBm dBm 9dBm dBm 13 dBm dBm 8dBm dBm 12 dBm dBm 4 7 dBm dBm 11 dBm dBm 6dBm dBm 10 dBm dBm 5 dBm dBm 9dBm dBm 4dBm dBm 8dBm dBm 3 dBm dBm 6 dBm dBm 2dBm dBm 5dBm dBm 1 dBm dBm 4 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 13 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 8 4 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 13 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 2 0 dB 0 05 to 8 4 GHz typical not a specification 5 27 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Powe Levd Accuracy Flatness Test Record 5 of 27 Model 68117C w Option 15A Serial No Date Model 68117C with Option 15A High Power with Option 2A S
163. ighted Power Level Output Highlighted Power Level Li 48 88 dBm Log dBm or Em Linear MV Units i d i rM DIE Output Next Tagged Power Level Output Previous Tagged Power Level NOTE Refer to Chapter 3 paragraph 3 9 for Fixed Power L evel Mode operating in structions Figure 4 7 Fixed Power Level Mode Menu Map 681XXC OM 4 11 ICW SWEEP SELECT IFREQUENC CONTROL LEVEL ALC SELECT LEVEL CONTROL LOCAL OPERATION CW POWER MAPS SWEEP MODE ELevel Sw Li 8 88 dBm L2 1 00 CW SWEEP SELECT FREQUENC CONTROL LEVEL ALC SELECT LEVEL CONTROL Edit Start Power Level Edit End Power Edit Dwell Tlme Edit Step Size Edit Number of Steps ECW Fa 3 5880 000 000 GHz 4 OF SuplBLC Mode Edit Start Power Level Edit End Power Level NOTE ___ Log dBm or Linear mV Refer to Chapter 3 paragraph 3 10 Power Sweep for CW Power Sweep Mode operating instructions Figure 4 8 CW Power Sweep Mode Menu Map 4 12 681XXC OM LOCAL OPERATION SWEEP FREQUENCY MAPS STEP POWER MODE CWI SWEEP Edit Start Power Level Edit End Power Level LEVEL ALC DETE gt CONTROL EZ AM a CW SWEEP SELECT IFREQUENC CONTROL LEVEL ALC SELECT gt LEVEL CONTROL MODULATION SYSTEM
164. ild soap or detergent and water or a commer cial window cleaner When cleaning use a soft lint 681XXC OM 6 13 OPERATOR ROUTINE MAINTENANCE MAINTENANCE free cloth Do not use abrasive cleaners tissues or paper towels which can scratch the plastic surface Replacing the value of the line fuse used in the 681XXC is de Line Fuse termined by the line voltage sel ection a 5A type T line fuse ne voltage a 2 5 type T line Before changing the fuse always remove the power cord from the power outlet There is the risk of receiving a fatal electric shock if the fuse is replaced with the power cord con nected Always use a new fuse of the type and rating specified by the fuse markings on the rear panel of the instrument fuse for 220 Vac line voltage These line fuse values are printed on the rear panel next to the fuse holder Fuse Holder Figure6 2 Replacing theLineFuse Step 1 Disconnect the 681XXC from the power source Step 2 Using a small flat blade screwdriver turn the fuse cap counter clockwise and re move the fuse holder 6 14 681XXC OM OPERATOR ROUTINE MAINTENANCE MAINTENANCE Step 3 Replace the fuse the fuse holder Step 4 Install the fuse holder in the rear panel Using the screwdriver rotate the fuse cap clockwise to secure the fuse holder in place Step5 Reconnect the signal generator to the power source 681XXC OM 6 15 6 16 Chapter 7 Use
165. ill have unleveled RF output in the 0 01 2 GHz frequency range Error 129 Switched Filter or Level Detector Failed Indicates a failure of either the switched filter or level detector circuitry The 681XXC may or may not produce an RF output Use caution and always determine the out put power level when operating the 681 in this condition Error 130 2 3 3 GH Switched Filter Indicates a failure in the 2 3 3 GHz switched filter path within the switched filter assembly The 681XXC may or may not produce an RF output in this frequency range Use caution and always determine the output power level when operating the 681XXC in this condition Error 131 3 3 5 5 GH Switched Filter Indicates a failure in the 3 3 5 5 GHz switched filter path within the switched filter assembly The 681XXC may or may not produce an RF output in this frequency range Use caution and always determine the output power level when operating the 681XXC in this condition Error 132 5 5 8 4 GH Switched Filter Indicates a failure in the 5 5 8 4 GHz switched filter path within the switched filter assembly The 681XXC may or may not produce an RF output in this frequency range Use caution and always determine the output power level when operating the 681XXC in this condition Error 133 8 4 13 25 GH Switched Filter Indicates a failure in the 8 4 18 25 GHz switched filter path within the switched filter assembly The 681
166. instrument and information on its identification number related manuals op tions and performance specifications A listing of recommended test equipment is also provided The Series 681XXC Synthesized Signal Generators are microproces sor based synthesized signal sources with high resolution phase lock capability They generate both broad full range and narrow band sweeps and discrete CW frequencies across the frequency range of 10 MHz to 65 GHz All functions of the signal generator are fully con trollable locally from the front panel or remotely except for power on standby via the I E E E 488 General Purpose Interface Bus GPIB The series presently consists of seven models covering a variety of fre quency and power ranges Table 1 1 page 1 4 lists models frequency ranges and maximum leveled output 1 3 GENERAL 681XXC INFORMATION MODELS 1 1 Series 681XXC Modds Output Power 681XXC Output Power Model Frequency Output Power w Step Attenuator w Electronic Step Attenuator 68117C 0 01 8 4 GHz 13 0 dBm 11 0 dBm 9 0 dBm 68137C 2 0 20 0 GHz 13 0 dBm 11 0 dBm 3 0 dBm 68147C 0 01 20 0 GHz 13 0 dBm 11 0 dBm 3 0 dBm 0 01 2 0 GHz 13 0 dBm 11 0 dBm 68167C 2 0 20 0 GHz 9 0 dBm 7 0 dBm Not Available 20 0 40 0 GHz 6 0 dBm 3 0 dBm 0 01 2 0 GHz 11 0 dBm 10 0 dBm 2 0 20 0 GHz 10 0 dBm 8 5 dBm Bom 20 0 40 0 GHz 42 5 dBm 0 0 dBm
167. ints at which correction information is to be taken by press ing Edit Points to open the number of points parameter for editing Edit the current number of points using the cursor control key or rotary data knob or enter a new value using the keypad and the STEPS termination key The number of points 681XXC OM LOCAL FRONT PANEL OPERATION When a power offset table is se lected ON this status message is displayed on all menu displays to remind the operator that user level flatness correction has been applied totheALC 681XXC OM LEVELING OPERATIONS range is 2 to 801 When you have finished setting the open number of points parameter close it by pressing Edit Points or by making another menu selection Now press Start Cal to begin automatically taking power level correction information at each frequency point During this process the menu displays the status Calibrating along with the current measure ment frequency point NOTE Toterminate the measurement process at any time before completion press Abort Once the power offset table has been created it is stored in non volatile memory The power offset ta ble is now ready to be applied to the test setup Dis connect the Power Sensor and Power Meter from the test setup Applying User Level Flatness Correction Whenever user level flatness correction is applied to thetest setup by activating the power offset table the set power level i
168. ious Menu 3 23 LOCAL FRONT CW FREQUENCY PANEL OPERATION OPERATION Scanning Tagged Frequencies To to the Tagged Frequencies Menu below from the CW Fre quency Control menu press Tag Freq Menu Li dBm E This menu lets you select the tagged frequencies for output using the Scan Up and Scan Dn keys Return to the CW Frequency Control Menu display by pressing Previous Menu Selecting a Whilein the CW frequency mode you can edit the Power Level current CW frequency output power level or enter a new output power level Editing the Current Power Level Press Edit L1 to open the power level parameter then edit the current power level using the cursor control key or rotary data knob To close the open power level parameter press Edit 1 or make an other menu selection Entering a New Power Level Press Edit L1 to open the power level parameter then enter the new power level using the keypad and appropriate terminator key To close the open power level parameter press Edit L1 or make an other menu selection NOTE You can also select any of the preset power levels or a power level sweep for a CW frequency For instructions refer to paragraphs 3 9 Fixed Power L evel Op eration and 3 10 Power L evel Sweep Operation 3 24 681XXC OM LOCAL FRONT SWEEP FREQUENCY PANEL OPERATION OPERATION CW Ramp When active the signal generator s CW ramp pro vide
169. ircuitry on the A10 PCB Use caution and always determine the output power level when operating the 681 XXC in this condi tion Error 123 Detector Log Amp Failed Indicates a failure of the level detector log amplifier circuitry on the A10 PCB Use caution and always determine the output power level when operating the 681XXC in this condition Error 124 Full Band Unlocked and Unleveled Indicates a failure of both YIG tuned oscillators Do Not Attempt to Operate Refer the instrument to a qualified service techician 681XXC OM 6 5 ERROR AND WARNING STATUS MESSAGES OPERATOR MAINTENANCE Table6 1 Sdf Test Error Messages 3 of 4 Error Message Description Remarks Error 125 8 4 20 GHz Unlocked and Unleveled Indicates a failure of the 8 4 to 20 GHz YIG tuned oscillator Do Not Attempt to Operate Refer the instrument to a qualified service techician Error 126 2 8 4 GHz Unlocked and Unleveled Indicates a failure of the 2 to 8 4 GHz YIG tuned oscillator Do Not Attempt to Op erate Refer the instrument to a qualified service techician Error 127 Indicates a failure of the level detector input circuitry on the A10 PCB Use caution Detector Input Circuit and always determine the output power level when operating the 681 in this Failed condition Error 128 Indicates a failure of the Down Converter leveling circuitry The 681XXC operates 01 2 GHz Unleveled normally but w
170. is menu lets you perform the following a Select preset power levels LO L1 L2 L3 or L4 for output a Gotothe Level List menu Gotothe Tagged Levels menu Press Log Linear to select power level units When Log is selected units arein dBm when Linear is se lected units are mV The soft key label is high lighted in reverse video to reflect your selection Level List To gotothe Level List menu below press Level List This menu lets you select a power level from the list to tag edit or output 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM FIXED POWER LEVEL OPERATION Use the cursor control key to select a power level from the level list The selected power level is high lighted in reverse video and displayed in full below the level list Press Tag to mark selected power level place an Lin front of it If a power level is already tagged pressing Tag will untag it remove the L Tagging selected power levels lets you quickly switch be tween them using the scan keys of the Tagged Lev els menu Press Edit to edit the selected power level or enter a new power level Press Output Level to output the selected level This power level is output until you select another level from the list and press Output Level On the level list the output power level selection is marked by a black square or if tagged an L highlighted in reverse video When you are finished press Previous
171. it Special order instrument configura tions also have an additional special serial number tag attached to the rear panel of the unit When ordering parts or corresponding with Anritsu Customer Service please use the correct serial number with reference to the specific in strument s model number i e Model 68147C Synthesized Signal Gen erator Serial No 875012 This manual is available on CD ROM as an Adobe Acrobat Portable Document F ormat pdf file The file be viewed using Acrobat Reader a free program that is also included on the CD ROM The file is linked such that the viewer can choose a topic to view from the displayed bookmark list and jump to the manual page on which the topic resides The text can also be word searched Contact Anritsu Customer Service for price and availability This is one of a four manual set that consists of an Operation Manual a GPIB Programming M anual a SCPI Programming M anual and a Maintenance Manual GPIB Pro This manual provides information for remote opera gramming tion of the signal generator with 681XXC Product Manual Specific commands sent from an external controller via the 488 General Purpose Interface Bus GPIB It contains a general description of the GPIB and bus data transfer and control functions a complete listing and description of all 681XXC GPIB Product Specific commands and several program ming examples The Anritsu part number for the GPIB Progr
172. l Accuracy CW Frequency 5 0 GHz CW Frequency 25 0 GHz CW Frequency 50 0 GHz Set Power Measured Power Set Power Measured Power Set Power Measured Power 10 dBm dBm 2 5 dBm dBm 0dBm dBm 9dBm dBm 1 5 dBm dBm 1 dBm dBm 8 dBm dBm 4 0 5 dBm dBm 2 dBm dBm 7 dBm dBm 0 5 dBm dBm 3 dBm dBm 6dBm dBm 1 5 dBm dBm 4 dBm dBm 5dBm dBm 2 5 dBm dBm 5 dBm dBm 4 dBm dBm 3 5 dBm dBm 6 dBm dBm 3 dBm 4 5 dBm dBm 7 dBm dBm 2 dBm dBm 5 5 dBm dBm 8 dBm dBm 1 dBm dBm 6 5 dBm dBm 9 dBm dBm 0 dBm dBm 7 5 dBm dBm 10 dBm dBm 1 dBm dBm 8 5 dBm dBm 11 dBm dBm 2 dBm dBm 9 5 dBm dBm 12 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Specification is 1 5 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 2 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 01 to 40 GHz 2 2 dB 40 to 65 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 2 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 2 0 dB 0 05 to 20 GHz 4 0 dB 20 to 40 GHz 5 0 dB 40 to 65 GHz typical not a specification 681XXC OM 5 45 5 46 Chapter 6 Operator Maintenance Table of Contents 6 1 INTRODUCTION 4 2 xx uu ane 4 6 3 6 2 ERROR AND WARNING STATUS MESSAGES 6 3 Self Test Error 6
173. lay Area and the surrounding menu keys Data Display The data display provides information about the current status of the 681XXC in a menu display for mat This information indudes the operating mode of the instrument the value of the active frequency and power level parameters and the modulation status Menu Keys Menu keys provide for selecting the operating mode parameters and configuration of the signal genera tor 3 6 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM Data Entry Area RF Output Control Key Connectors FRONT PANEL LAYOUT The data entry area consists of data entry keys and controls that provide for 1 changing values for each 681XXC parameter and 2 terminating the value entry and assigning the appropriate units GHz MHz dBm etc The RF output control key provides for turning the RF output power on and off OUTPUT OFF is indi cated by a red LED OUTPUT ON by a yellow LED The front panel has both input and output connec tors Modulation Connectors The modulation connectors provide for applying ex ternal AM FM or Square Wave modulation to the RF output signal External ALC Connector The external ALC connector provides for leveling the RF output signal externally using either a detec tor or a power meter RF Output Connector The RF output connector provides RF output from a 500 source NOTE To prevent power losses due to an imped ance mismatch the mating con
174. level If the output and desired power levels do not equal the ALC adjusts the power output until they do The feedback signal can be provided by either the inter nal detector or an external detector or power meter Alternatively the output power can be set to a fixed level without using the normal feedback ALC off The ALC mode menu lets you make the selection of a leveling mode To goto the ALC Mode menu first press the main menu key LEVEL ALC SELECT At the Level ALC Select Menu display press ALC Mode The ALC Mode Menu below is displayed Analog Sw F1 HEE HAH d Fz 28 BE 681XXC OM LOCAL FRONT LEVELING PANEL OPERATION OPERATIONS The ALC Mode menu lets you perform the following Q Gotothe leveling menu select the ALC mode of operation Gotothe attenuation menu decouple the attenuator if equipped from the ALC system and set the power level and attenuation Select either the front panel or rear panel ex ternal ALC input Internal Leveling This is the normal default leveling mode Output power is sensed by the internal detector in the 681XXC The detector output signal is fed back to the ALC circuitry to adjust the output power level Internal ALC is selected from the leveling menu To go to the Leveling Menu from the ALC Mode menu press Leveling Menu The Leveling Menu below is displayed Analog Sweep Fi AEE ae Hee m GHz m maa Hort Orr ALE
175. lf test You can perform an instrument self test at any time during normal operation by pressing 1031 and then Selftest If the signal generator fails self test an error mes sage s is displayed on the front panel data display These error messages describe the malfunction and in most cases provide an indication of what has failed Table 6 1 next page is a summary listing of the self test error messages Induded for each is a description of the probable cause s whether or not the 681XXC is still operable and if operable what operational degradation can be expected OPERATOR MAINTENANCE ERROR AND WARNING STATUS MESSAGES WARNING Self test error messages normally indicate the failure of an internal component or assembly of the signal generator There are no operator serviceable components inside Refer servicing of the instrument to qualified service technicians To prevent the risk of electrical shock or damage to precision components do not remove the equipment covers Table6 1 Self Test Error Messages 1 of 4 Error Message Description Remarks Error 100 DVM Ground Offset Failed Indicates a calibration related problem Do Not Attempt to Operate Refer the instrument to a qualified service technician Error 101 DVM Positive 10V Reference Indicates either a calibration related problem or a defective 10 Volt reference Do not Attempt to Operate Refer the instrument to a q
176. list index Once the frequency and power level information has been entered into the current list index the list in dex is incremented by one Selecting a sweep range involves choosing a start index and stop index for the list sweep To goto the Sweep Menu below from the main List Sweep menu press Sweep Menu Level L dBm Trigger WW Ct AM 8 Ed 5 CH Analog This menu lets you select a list sweep range set the dwell ti me per step and go to the trigger menu 681XXC OM LOCAL FRONT SWEEP FREQUENCY PANEL OPERATION OPERATION Press Start Index to open the list sweep start index parameter Press Stop Index to open the list sweep stop index parameter Press Dwell Time to open the dwell time per step parameter Open the parameter you wish to change then edit the current value using the cursor control key or ro tary data knob or enter a new value using the key pad and appropriate terminator key When you have finished setting the open parameter dose it by pressing its menu soft key or by making another menu selection To gototheList Sweep Trigger menu from this menu press Trigger The trigger menu lets you se lec a list sweep trigger Press Previous Menu to return to the main List Sweep Menu display Selecting a There are four modes of sweep triggering in list List Sweep sweep frequency mode each selectable from the Trigger trigger menu Thefollowing is a description of each mode
177. m 3 dBm dBm 1 dBm dBm 6 dBm dBm 2 dBm dBm 2 dBm dBm 5 dBm dBm 1 dBm dBm 3 dBm dBm 4 dBm dBm 0 dBm dBm 4 dBm dBm 3 dBm dBm 1 dBm dBm 5 dBm dBm 2 dBm dBm 2 dBm dBm 6 dBm dBm 1 dBm dBm 3 dBm dBm 7 dBm dBm 0dBm dBm 4 dBm dBm 8 dBm dBm 1 dBm dBm 5 dBm dBm 9 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 3 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 40 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 3 dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 05 to 20 GHz 8 2 dB 20 to 40 GHz typical not a specification 5 38 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Level Accuracy and Flatness Test Record 21 of 27 Model 68167C w Option 15A Serial No Date Model 68167C with Option 15A High Power without Option 2B Step Attenuator Power Level Accuracy Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz CW Frequency 25 0 GHz Set Power Measured Power Set Power Measured Power Set Power Measured Power 13 dBm dBm 13 dBm dBm 6 dBm 12 dBm dBm 12 dBm dBm 5dBm dBm 11 dBm dBm 11 dBm dBm 4dBm dBm 10 dBm dBm 10 dBm dBm 3 dB
178. m dBm 10 dBm dBm 6dBm dBm 3dBm dBm 9dBm dBm 5 dBm dBm 2dBm dBm 8dBm dBm 4 dBm 1 dBm dBm 7 dBm dBm 3 dBm dBm 0dBm dBm 6dBm dBm 2 dBm dBm 1 dBm dBm 5 dBm dBm 1 dBm dBm 2 dBm dBm 4dBm dBm 0dBm dBm 3 dBm dBm 3 dBm dBm 1 dBm dBm 4 dBm dBm 2 dBm dBm 2 dBm dBm 5 dBm dBm 1 dBm dBm 3 dBm dBm 6 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 6 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 40 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 6dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 2 0 dB 0 01 to 20 GHz 4 0 dB 20 to 40 GHz typical not a specification 681XXC OM 5 37 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Level Accuracy and Flatness Test Record 20 of 27 Model 68167C Serial No Date Model 68167C with Option 2B Step Attenuator Power Level Accuracy Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz CW Frequency 25 0 GHz Set Power Measured Power Set Power Measured Power Set Power Measured Power 11 dBm dBm 7 dBm dBm 3 dBm dBm 10 dBm dBm 6dBm dBm 2dBm dBm 9dBm dBm 5 dBm dBm 1 dBm dBm 8 dBm dBm 4 dBm dBm 0 dBm dBm 7 dBm dB
179. m dBm 11 dBm dBm 11 dBm dBm 10 dBm dBm 10 dBm dBm 9dBm dBm 9dBm dBm 8 dBm dBm 8 dBm dBm 7 dBm dBm 7 dBm dBm 6 dBm dBm 6 dBm dBm 5 dBm 5 dBm dBm 4dBm dBm 4dBm dBm 3 dBm dBm 3 dBm dBm 2dBm dBm 2dBm dBm 1 dBm dBm 1 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 13 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 8 4 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 13 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 2 0 dB 0 05 to 8 4 GHz typical not a specification 681XXC OM 5 19 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Levd Accuracy Flatness Test Record 2 of 27 Model 68117C Serial No Date Model 68117C with Option 2A Step Attenuator Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 11 dBm dBm 11 dBm dBm 10 dBm dBm 10 dBm dBm 9dBm dBm 9dBm dBm 8dBm dBm 8dBm dBm 7 dBm dBm 7 dBm dBm 6 dBm dBm 6 dBm dBm 5 dBm dBm 5 dBm dBm 4dBm dBm 4dBm dBm dBm dBm 3dBm dBm 2dBm dBm 2dBm dBm 1 dBm dBm 1 dBm dBm 0 dBm dBm 0 dBm dBm 1 dBm dBm 1 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power L
180. m dBm 9dBm dBm 9dBm dBm 2 dBm dBm 8 dBm dBm 8 dBm dBm 1 dBm dBm 7dBm dBm 7 dBm dBm 0 dBm dBm 6 dBm dBm 6 dBm dBm 1 dBm dBm 5 dBm dBm 5 dBm dBm 2 dBm dBm 4 dBm dBm 4 dBm dBm 3 dBm dBm 3 dBm dBm 3dBm dBm 4 dBm dBm 2 dBm dBm 2 dBm dBm 5dBm dBm 1 dBm dBm 1 dBm dBm 6 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 6 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 40 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 6 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 2 0 dB 0 05 to 20 GHz 4 0 dB 20 to 40 GHz typical not a specification 681XXC OM 5 39 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Level Accuracy Flatness Test Record 22 of 27 Model 68167C w Option 15A Serial No Date Model 68167C with Option 15A High Power with Option 2B Step Attenuator Power Level Accuracy Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz CW Frequency 25 0 GHz Set Power Measured Power Set Power Measured Power Set Power Measured Power 11 dBm dBm 11 dBm dBm 3dBm dBm 10 dBm dBm 10 dBm dBm 2dBm dBm 9dBm dBm 9dBm dBm 1 dBm dBm 8 dBm dBm 8 dBm dBm 0 dBm dBm
181. n a step size that is smaller than the resolution of the instrument or 5 the step sweep ti me and number of steps does not result in a dwell time of 10 ms Enter a valid sweep start frequency dF value step size or number of steps If the error message remains displayed call a service technician 681XXC OM OPERATOR ROUTINE MAINTENANCE MAINTENANCE 6 4 ROUTINE MAINTENANCE Routine maintenance that can be performed by the operator consists of cleaning the fan filter cleaning the data display and replacing a defective line fuse Cleaningthe 681XXC must always receive adequate ventila FanFilter tion A blocked fan filter can cause the instrument to overheat and shut down Check and dean the rear panel fan honeycomb filter periodically Clean the fan honeycomb filter more frequently in dusty environments Clean the filter as follows Step1 Removethefilter guard from the rear panel by pulling out on the four panel fas teners holding them in place Figure 6 1 Step2 Vacuum the honeycomb filter to clean it Step3 Install thefilter guard back on the rear panel Step4 Pressin the panel fasteners to secure the filter guard tothe rear panel Filter Guard Panel Fastener 4 Figure 6 1 Removing Replacing theFan Filter Guard Cleaning the Data Display data display of the signal generator is protected by a plastic display filter To clean the display filter use m
182. n by using either shipping tape or an industrial stapler Address the Container If the instrument is being returned to Anritsu for service mark the address of the appropriate Anritsu service center Table 2 1 and your return address on the carton one or more prominent locations 2 13 INSTALLATION Table 2 1 ANRITSU Service Centers ANRITSU SERVICE CENTERS UNITED STATES ANRITSU COMPANY 490 Jarvis Drive Morgan Hill CA 95037 2809 Telephone 408 776 8300 1 800 ANRITSU FAX 408 776 1744 ANRITSU COMPANY 10 New Maple Ave Unit 305 Pine Brook NJ 07058 Telephone 201 227 8999 1 800 ANRITSU FAX 201 575 0092 ANRITSU COMPANY 1155 E Collins Blvd Richardson TX 75081 Telephone 1 800 ANRITSU FAX 972 671 1877 AUSTRALIA ANRITSU PTY LTD Unit 3 170 Foster Road Mt Waverley VIC 3149 Australia Telephone 03 9558 8177 FAX 03 9558 8255 BRAZIL ANRITSU ELECTRONICA LTDA Praia de Botafogo 440 Sala 2401 CEP22250 040 Rio de Janeiro Ru Brasil Telephone 021 527 6922 FAX 021 53 71 456 CANADA ANRITSU INSTRUMENTS LTD 215 Stafford Road Unit 102 Nepean Ontario K2H 9 1 Telephone 613 828 4090 FAX 613 828 5400 CHINA ANRITSU ELECTRONICS SHANGHAI CO LTD 2F Rm B 52 Section Factory Building No 516 Fu Te Rd W Shanghi 200131 China Telephone 21 58680226 58680227 FAX 21 58680588 FRANCE ANRITSU S A 9 Avenue du Quebec Zone de Courtaboeuf 91951 Les Ulis Ced
183. n is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 20 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 3 dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 05 to 20 GHz typical not a specification 681XXC OM 5 33 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Levd Accuracy and Flatness Test Record 16 of 27 Model 68147 w Option 15A Serial No Date Model 68147C with Option 15A High Power without Option 2 Step Attenuator Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 13 dBm dBm 17 dBm dBm 12 dBm 16 dBm dBm 11 dBm dBm 15 dBm dBm 10 dBm dBm 14dBm dBm 9dBm dBm 13 dBm dBm 8dBm dBm 12 dBm dBm 4 7 dBm dBm 11 dBm dBm 6 dBm 10 dBm dBm 5 dBm dBm 9dBm dBm 4dBm dBm 8dBm dBm 3 dBm dBm 7dBm dBm 2dBm dBm 6dBm dBm 1 dBm dBm 5 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Set Power Max Power Min Power Variation 13 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 20 GHz Power Level Flatness Analog Sweep Model 68347C only Set Power Max Power Min Power Variation 13 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 2 0 dB 0 05 to 20 GHz typical not a specification
184. nal ALC input con nection and selected the sensor type press ALC Loop The ALC Loop Menu below is dis While monitoring the power level at the external de tection point first press Ext ALC Adj then use the cursor control key or rotary data knob to adjust the external ALC signal to obtain the set power level Toreturn to the Leveling Menu press ALC Mode then press Leveling Menu 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM LEVELING OPERATIONS At the Leveling menu pressing either Internal or Fixed Gain will turn off external leveling Press Previous Menu to return to the ALC M ode Menu display Fixed Gain the fixed gain mode the ALC is disabled The RF Level DAC and step attenuator if installed are used to control the relative power level Power is not detected at any point and the absolute power level is uncalibrated Fixed gain mode is selected from theleveling menu Press Leveling Menu to goto the Leveling Menu Analog Sw El 2 888 GEE Bee B GHz F2 HEE aad ALC Leer User To select fixed gain mode press Fixed Gain To return to normal ALC operation press Internal Press Previous Menu to return to the ALC Mode Menu display 3 63 LOCAL FRONT PANEL OPERATION i NOTE The set power level may not maintained when switching be tween attenuator coupling modes 3 64 Attenuator Decoupling LEVELING OPERATIONS In 681XXCs equippe
185. nal generator in CW frequency mode by pressing the main menu key CW SWEEP SELECT At the resulting menu display press CW The 681X XC is now in CW frequency mode 3 69 LOCAL FRONT PANEL OPERATION 3 70 LEVELING OPERATIONS Place the signal generator in a fixed power level mode by pressing the main menu key LEVEL ALC SELECT At the resulting menu display press Level The 681XXC is now in fixed non swept power level mode At the Level Menu press User Cal The User Level Cal Menu below is displayed 2 888 BEE GHz GHz This menu lets you perform the following Create a power offset table Select a measurement frequency range edit the start and stop frequency parameters Select the number of points at which correction information is to be taken Apply a power offset table to the test setup First press the menu soft key to select the power offset table User 1 User 2 User 3 User 4 or User 5 that you wish to create Next set the measurement frequency range by pressing Edit Start or Edit Stop to open the start Flo or stop Fhi frequency parameter for editing Edit the current frequency using the cursor control key or rotary data knob or enter a new value using the keypad and appropriate termination key When you have finished setting the open parameter close it by pressing its menu edit soft key or by making another menu selection Then select the number of frequency po
186. ncy 50 0 GHz Set Power Measured Power Set Power Measured Power Set Power Measured Power 8 5 dBm dBm 0dBm dBm 1 5 dBm dBm 7 5 dBm dBm 1 dBm dBm 2 5 dBm dBm 6 5 dBm dBm 2 dBm dBm 3 5 dBm dBm 5 5 dBm dBm 3 dBm dBm 4 5 dBm dBm 4 5 dBm dBm 4 dBm dBm 5 5 dBm dBm 3 5 dBm dBm 5 dBm dBm 6 5 dBm dBm 2 5 dBm dBm 6 dBm dBm 7 5 dBm dBm 1 5 dBm dBm 7 dBm dBm 8 5 dBm dBm 4 0 5 dBm dBm 8 dBm dBm 9 5 dBm dBm 0 5 dBm dBm 9 dBm dBm 10 5 dBm dBm 1 5 dBm dBm 10 dBm dBm 11 5 dBm dBm 2 5 dBm dBm 11 dBm dBm 12 5 dBm dBm 3 5 dBm dBm 12 dBm dBm 13 5 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Specification is 1 5 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 2 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 01 to 40 GHz 2 2 dB 40 to 60 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 2 dBm dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 05 to 20 GHz 8 2 dB 20 to 40 GHz 10 2 dB 40 to 60 GHz typical not a specification 5 44 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Level Accuracy and Flatness Test Record 27 of 27 Model 68197C Serial No Date Model 68197C Power Level Accuracy Power Level Accuracy Power Leve
187. ncy power level and modulation in formation for the current signal generator setup Menu labels for the current menu s soft keys appear along the bottom and right side of the display Title Bars A shaded title bar identifies each parameter area Mode information is displayed in reverse video on the title bars Q Frequency Mode Title Bar The current frequency mode CW Analog Sweep Step Sweep Manual Sweep or List Sweep appears on the left side of the bar an analog step or list sweep mode the type of sweep trigger ap pears on the right side Q Level Mode Title Bar The current power level mode Level or Level Sweep appears on the left side of the bar a level sweep mode the type of sweep trigger appears on the right side of the bar Modulation Title Bars E ach type of signal modulation AM FM Square Wave has a separate title bar on the display Parameter Areas The parameter areas show the frequency power level and modulation information for the current 681XXC setup Q Frequency Parameters Area The current CW frequency in GHz the start and stop fre quencies of the current frequency sweep range in GHz the current list index and frequency or the start and stop indexes for the list sweep are displayed in this area Q Power Level Parameters Area The cur rent power level in dBm or the start and stop levels of the current power level sweep range in dBm or mV are displayed in this
188. nector and cable should also be rated at 509 3 7 LOCAL FRONT DATA DISPLAY PANEL OPERATION AREA 3 3 DATA DISPLAY AREA The data display area consists of the data display and the surrounding menu keys The data display is a dot matrix liquid crystal display LCD that provides 16 lines of 40 characters each Information is pre sented on the LCD in the form of menu displays The menu keys ei ther select the main menu to be displayed select a sub menu of the current menu display or control a function on the current menu dis play Figure 3 2 shows the format of the menu display and identifies the display elements It also shows the placement of the menu keys re lation to the display The paragraphs that follow provide descriptions of the menu display elements and the menu keys Frequency Frequency Level Menu Main Menu Main Menu Mode Parameters Level Mode Parameters Labels Menu Keys Key Cursor Title Bar Area Title Bar Area Side Keys Soft Keys CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC ELECT Modulation Title Bars LEVEL CONTROL MODULATION SYSTEM Modulation Menu Menu Labels Status Areas Soft Keys Bottom Keys Figure 3 2 Front Pand Data Display Area 3 8 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM DATA DISPLAY AREA Menu Display The menu display is divided into specific areas that Format show the freque
189. nits gt 40 GHz to lt 50 GHz lt 40 dBc 60 GHz units gt 40 GHz to lt 60 GHz lt 30 dBc 65 GHz units gt 40 GHz to lt 65 GHz lt 25 dBc Nonharmonics 0 1 Hz to 10 MHz Option 22 lt 30 dBc 10 MHz to lt 2 GHz lt 40 dBc gt 2 GHz to lt 65 GHz lt 60 dBc 681XXC OM PERFORMANCE SPECIFICATIONS SINGLE SIDEBAND PHASE NOISE dBc Hz Frequency Range Offset From Carrier 100 Hz 1 kHz 10 kHz 100 kHz 0 1 Hz to lt 10 MHz w Option 22 90 120 130 130 gt 10 MHz to lt 2 0 GHz 77 88 86 100 gt 2 0 GHz to lt 6 0 GHz 78 88 86 102 gt 6 0 GHz to lt 10 0 GHz 73 86 83 102 gt 10 0 GHz to lt 20 0 GHz 66 78 78 100 gt 20 0 GHz to lt 40 0 GHz 60 75 72 94 gt 40 0 GHz to lt 65 0 GHz 54 69 64 88 POWER LINE and FAN ROTATION SPURIOUS EMISSIONS dBc Offset From Carrier Frequency Range 300 Hz 300Hz to 1 kHz gt 1 kHz 10 MHz to lt 8 4 GHz lt 50 lt 60 lt 60 gt 8 4 GHz to lt 20 GHz lt 46 lt 56 lt 60 gt 20 GHz to lt 40 GHz lt 40 lt 50 b4 gt 40 GHz to 65 GHz lt 34 lt 44 lt 48 RESIDUAL FM CW and Step Sweep modes 50 Hz 15 kHz BW Frequency Range Residual FM Hz RMS 10 MHz to lt 8 4 GHz lt 120 gt 8 4 GHz to lt 20 GHz lt 220 gt 20 GHz to lt 40 GHz lt 440 gt 40 GHz to lt 65 GHz lt 880 RESIDUAL FM Analog Sweep an
190. nnectors rear panel Option 19 5 Programmability Adds GPIB command mnemonics complying with Standard Commands for Pro grammable Instruments SCPI Version 1993 0 SCPI pro gramming complies with IEEE 488 2 1987 Option 22 0 1 Hz to 10 MHz Audio Frequency Adds frequency coverage below 10 MHz In models having a high end frequency of lt 20 GHz rated output power is re duced by 1 dB in models having a high end frequency of gt 20 GHz rated output power is reduced by 2 dB B 9 B 10 Subject Index Number 681XXC Front Panel Layout 3 6 General Description 1 3 Manual Electronic 1 5 Manuals Related 1 5 Models List of 1 4 Options List of 1 6 Performance Specifications B 1 Rear Panel Layout A 2 A ALC 3 60 AM Mode Menu Map 4 15 Operating Modes 3 73 Providing AM 3 73 Analog Sweep Frequency Mode Menu Map 4 7 Calibration Reference Oscillator 3 92 Connectors Front Panel 3 7 Rear Panel A 1 CW Frequency Accuracy Test Test Procedure 5 6 Test Records 5 7 5 12 Test Setup 5 5 CW Frequency Mode Menu Map 4 6 CW Power Sweep Mode Menu Map 4 12 Selecting a Sweep Range 3 56 Selecting a Sweep Trigger 3 55 Selecting CW Power Sweep Mode 3 53 Selecting Linear or Logarithmic Sweep 3 57 Setting Dwell Time 3 54 Setting Step Size 3 54 D Data Display Description 3 8 681XXC OM Menu Display Format 3 9 Menu Keys 3 10 Data Entry Area Description 3 12 Default Parameter
191. ns Set Power Level Increment Set Time Increment Previous ES 0 7 Menu Figure 4 14 System Configuration Menu Map 4 18 681XXC OM Chapter 5 Operation Verification Table of Contents 5 1 5 3 5 2 TEST EQUIPMENT 5 5555 Re dR 5 3 5 3 TEST RECORDS 5 3 5 4 INITIAL 6BIXXC CHECKOUT au aa a Se 5 4 Power JD 5 4 5 4 Resetting 6 5 4 5 4 5 5 CW FREQUENCY ACCURACY TEST 5 5 Test 5 5 s e s bw 5 6 5 6 POWER LEVEL ACCURACY AND FLATNESS TES Ses s rooma aa ee whe ek 5 13 Test Setup CL 5 13 Power Level Accuracy Test Procedure 5 14 Power Level Flatness Test Procedure 5 15 5 1 INTRODUCTION 5 2 TEST EQUIPMENT 5 3 TEST RECORDS 681XXC OM Chapter 5 Operation Verification This chapter contains three operation verification tests that can be used to verify Series 681 Synthesized Signal Generator operation Setup instructions and performance procedures are included for each test The results can be compared with the specified limits that are shown on the test record forms that are provided for each test Table 5 1 lists the
192. ode 3 38 SWEEP FREQUENCY OPERATION n alternate sweep frequency mode the signal gen erator s output frequency sweeps alternately be tween any two sweep ranges in analog sweep or any two sweep ranges in step sweep The process of se lecting and activating the alternate sweep is identi cal for both analog and step sweep frequency modes To select the alternate sweep mode for analog sweeps start with the Analog Sweep Menu display to select the alternate sweep mode for step sweeps start with the Step Sweep Menu display below To go to the Alternate Sweep Menu below from the Step Sweep menu press Alt Swp Menu EStep Sweep Fi 2 GEG G F2 24 068 Li 8 88 This menu lets you perform the following Turn the alternate sweep mode on off Gotothe alternate range menu to select a sweep range for the alternate sweep Gotothe alternate level menu to select a power level for the alternate sweep Activating the Alternate Sweep The Alternate Sweep menu soft key Alt Sweep tog gles the alternate sweep mode on and off Press Alt Sweep toturn on the alternate sweep mode Notice that the Alternate Sweep menu on the following page changes to show that the alter nate sweep is now active 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM SWEEP FREQUENCY OPERATION Now press Previous Menu to return tothe Step Sweep Menu display or
193. ol Key 3 7 3 7 3 3 DATA DISPLAY 3 8 Menu Display Format c co or 3 9 3 10 3 4 DATA ENTRY 3 12 3 5 INSTRUMENT START UP 25 24 64 4 4 2 a4 6 3 14 Powering the 681XXC 3 14 Start Up Display ow xw ce Ro Rs 3 14 Standby Operation 3 14 Self Testing the 681XXC 3 15 Resetting to Default Parameters 3 15 3 10 POWER LEVEL SWEEP OPERATION i55 3 3 53 Selecting CW Power Sweep 3 53 Setting CW Power Sweep Step Size and Dwell Time3 54 Selecting CW Power Sweep Trigger 3 55 Selecting a Power Level Sweep Range 3 56 Selecting a Sweep Frequency Step Power Mode 3 58 Setting Power Level Step Size 3 59 3 11 LEVELING OPERATIONS 3 60 Selecting a Leveling Mode 3 60 Attenuator 0 3 64 ALC Power 3 65 User Cal User Level Flatness Correction 3 67 3 12 SIGNAL MODULATION 3 73 Amplitude Modulation Operating Modes 3 73 Providing Amplitude Modulation 3 73 ii 681XXC OM Table of Contents Continued 3 14 3 15 3 16 Frequency Modulation Operating Modes Providing Frequency Modulation Square Wave Modulation Operating Modes Providing Square Wave Modulation
194. operating mode press Unlocked Narrow to select the Unlocked Narrow FM operating mode or press Unlocked Wide to select the Unlocked Wide FM operating mode The FM status display will reflect your selection Press Previous Menu to return to the main E xter nal FM Status Menu display next page 3 75 LOCAL FRONT PANEL OPERATION This error message is displayed when the external FM modulating signal exceeds the input voltage range The message Reduce FM Input Level also appears at the bot tom of theF M status display FM is turned off until the modulating sig nal is within the input voltage 3 76 SIGNAL MODULATION FM off Sensitivity 1 886 MHz Ug 3 Impedance 56 Source Mode Deviation This menu contains an external FM status window that shows the current menu selections and the measured FM Deviation The FM deviation meas urement function measures the voltage of the exter nal modulation signal and calculates the peak frequency deviation This menu lets you perform the following a Turn FM on off Set the FM sensitivity Select the input impedance 6000 or 50Q of the input connector Select the input connector front panel or rear panel FM IN that is connected to the external signal source Press Off toturn FM on and off Both the FM status display and FM modulation status area will reflect your selection Press Edit Sens to open the F
195. or v pad is pressed or the rotary data knob is turned clock wise or counter clockwise For instructions on set ting the increment size refer to paragraph 3 13 Now try changing the current value of the CW fre quency displayed on your synthesizer from 2 0 GHz to 6 395 GHz Use both the cursor control key s a and v pads and the rotary data knob to make the value changes When you are finished your menu display should look like the example below To close the open parameter when you are finished editing press Edit F1 or make another menu selec tion 3 19 LOCAL FRONT PANEL OPERATION Entering a New Value Clear Back Entry space Terminator Key ey Keys M ENTR Sel 5 5 GHz dam 7 8 9 MHz ms kHz 5 STEPS Hz 0 ADRS Keypad 3 20 ENTERING DATA To change the current value of a parameter by en tering a new value for the parameter use the data entry keypad and termination keys As soon as you press one of the keys on the data en try keypad the current parameter display clears for entry of a new value Enter the new value for the parameter then press the appropriate terminator key to store it in memory If the entered value is out side the allowable range of the open parameter the entry is not accepted and the previous value for the parameter is displayed NOTE A frequency entry may
196. ower level Sweep or to select a power level sweep range refer to the procedures on pages 3 56 and 3 57 681XXC OM LOCAL FRONT POWER LEVEL PANEL OPERATION SWEEP OPERATION Setting Power Therearetwo ways to set the step size of the power Level Step Size This error message is displayed when 1 the step size valueentered is greater than the level sweep range 2 the number of steps en tered results in a step size of less than 0 01 dB Log or 0 001 Linear Entering a valid step size will dear the error level step that occurs after each frequency sweep set the step size or set the number of steps The step size range is 0 01 dB Log 0 001 mV Linear to the full power range of the ssignal generator the number of steps range 15 1 to 10 000 The power level step size is set from the level sweep ramp menu To goto the Level Sweep Ramp Menu below from the Level Sweep menu press Sweep Ramp gd Auto Dwell Time Step Size This menu lets you set the step size and the number of steps Press Step Size to open the step size parameter Press of Steps to open the number of steps pa rameter Open the parameter you wish to change then edit the current value using the cursor control key or ro tary data knob or enter a new value using the key pad and appropriate termination key When you have finished setting the open parameter close it by pres
197. p Mode 3 26 Setting the Analog Sweep Time 3 27 Selecting a Sweep Trigger 3 28 Step Sweep 3 29 Selecting Step Sweep Mode 3 29 Setting Step Size Dwell Time and Sweep Time 3 29 Manual SweepMode 3 32 Selecting Manual Sweep 3 32 Selecting a SweepRange 3 33 Selecting Power Level 3 35 Frequency 3 36 Selecting Alternate Sweep Mode 3 38 List Sweep 3 41 Selecting List Sweep 3 42 Editing the List i 6 no 4 60 x 3 3 43 Selecting List Sweep Range 3 46 Selecting a List Sweep Trigger 3 47 FIXED POWER LEVEL OPERATION 3 49 Selecting Fixed Power Level Mode 3 49 Selecting Power Level 3 49 Level Offset 3 52 POWER LEVEL SWEEP OPERATION 3 53 Selecting CW Power Sweep Mode 3 53 Setting CW Power Sweep Step Size and Dwal TMG a 2 2 te aoe 3 amp oO 8 3 54 Selecting CW Power Sweep Trigger 3 55 Selecting a Power Level Sweep Range 3 56 Selecting a Sweep Frequency Step Power Mode 3 58 Setting Power Level Step Size 3 59 681XXC OM Table of Contents Continued 3 11 3 12 3 13 3 14 3 15 3 16 681XXC OM LEVELING OPERATIONS Selecting Leveling Atten
198. p size range is 0 01 dB Log or 0 001 mV Linear to the full power range of the instrument the number of steps 5 1 to 10 000 The dwell time per step of the CW power sweep can be set for any time in the range of 1 ms to 99 sec f the sweep crosses a step attenuator set ting there will be a sweep dwell of approximately 20 ms to allow setting of the step attenuator The step size and dwell time per step are set from the CW Level Sweep Ramp menu below To goto the CW Level Sweep Ramp Menu from the CW Level Sweep menu press Sweep Ramp Dwell Fa 3 500 mea GHz Time Step Size This menu lets you set the dwell time the step size the number of steps and go to the trigger menu Press Dwell Time to open the dwell ti me per step parameter Press Step Size to open the step size parameter Press of Steps to open the number of steps parameter Open the parameter you wish to change then edit the current value using the cursor control key or ro tary data knob or enter a new value using the key pad and appropriate termination key When you have finished setting the open parameter close it by pressing its menu soft key or by making another menu selection To goto the CW Level Sweep Trigger menu from this menu press Trigger Menu The trigger menu is described on the following page Press Previous Menu to return to the CW L evel Sweep Menu display 681XXC OM LOCAL FRONT PAN
199. pen power level parameter when you are finished press its menu edit soft key or make another menu selection Selecting Type of Power Level Sweep Press Log Linear to select logarithmic or linear power level sweep When Log is selected power levels are in dBm when Linear is selected power levels in mV The soft key label is highlighted in reverse video to reflect your selection 3 57 LOCAL FRONT PANEL OPERATION Selecting a Sweep Fre quency Step Power Mode 3 58 POWER LEVEL SWEEP OPERATION analog sweep frequency step power mode or step sweep frequency step power mode a power level Step occurs after each frequency sweep The power level remains constant for the length of time re quired to complete each frequency sweep Available menus let you control the type of power level sweep linear or logarithmic the power level sweep range and step size To select an analog sweep frequency step power mode start with an analog sweep menu display to select a step sweep frequency step power mode start with a step sweep menu display Then press the main menu key LEVEL ALC SELECT At the resulting menu display press Lvl Swp The Level Sweep Menu is displayed This menu lets you perform the following Select a power level sweep range edit the sweep start and stop power level parameters Gotothe sweep ramp menu set the step size or number of steps NOTE To select logarithmic or linear p
200. play press CW The CW Menu below is displayed This menu lets you perform the following Select a CW frequency for output Copy the current frequency and power infor mation to the current list index Refer to page 3 41 for the list sweep frequency mode operat ing instructions Gotothe master slave menu Refer to Chap ter 7 paragraph 7 2 for Master Slave mode op erating instructions Select an output power level for the CW fre quency Gotothe CW ramp menu set the ramp sweep time and turn the CW ramp on off 3 21 LOCAL FRONT PANEL OPERATION Selecting a CW Frequency 3 22 CW FREQUENCY OPERATION There are several ways to select a CW frequency for output You can 1 edit the current frequency 2 enter a new frequency or 3 select one of the 20 pre set frequency parameters Editing the Current Frequency Press Edit 1 to open the frequency parameter then edit the current CW frequency using the cursor control key or the rotary data knob To dose the open frequency parameter press Edit 1 or make another menu selection Entering a New Frequency Press Edit F1 to open the frequency parameter then enter the new CW frequency using the keypad and appropriate terminator key To close the open frequency parameter press Edit F1 or make an other menu selection Selecting a Preset Frequency To select one of the preset frequencies for output press the main menu key
201. played ETT Fi 2 888 288 GHz b Press Edit Fi to open the current fre quency parameter for editing c Set F1 tothe CW frequency noted on the test record for the model being tested d Press Edit 1 to open the current power level parameter for editing Set L1 to the power level noted on the test record Measure the output power level with the Power Meter and record the reading on the test record Verify that the Power Meter reading meets the specifications stated on the test record Set L1tothe next test power level Re cord the Power Meter reading on the test record Repeat step 4 for the other levels listed on the test record for the current CW fre quency Repeat steps 1 thru 5 for all CW frequen cies listed on the test record 681XXC OM OPERATION VERIFICATION Power Level Flatness Test Procedure 681XXC OM POWER LEVEL ACCURACY AND FLATNESS TESTS Power level flatness is checked by measuring the power level variation during a full band sweep first in the step sweep mode then in the analog sweep mode Step 1 Set up the 681XXC as follows for a step sweep power level flatness test a Reset the instrument by pressing ELS then Reset The CW Menu is displayed b Press Step to place the 681XXC in the step sweep frequency mode and display the Step Sweep M enu below c With the Step Sweep menu displayed press the main menu key FREQUENCY CONTROL The Sweep Frequ
202. press GPIB The Configure GPIB Menu below is displayed J GFIBE Terminator T P Lue m _ Config GPIB Address 55 Mode Verify that the GPIB address and terminator shown on the display match the System Bus source address and data terminator that are set on the 360B VNA If the address of the 681XXC on the System Bus needs changing press GPIB Address Enter the new address using the cursor control key or the data entry keypad and the terminator key HZ ms ADRS The new GPIB address will appear on the display To change the data terminator press Line Term to select the correct GPIB data delimiter Press SS Mode toturn on SS mode This places the 681X XC in a source lock mode The signal generator is now configured for 360B source lock mode operation Initiating 360B Source Lock Mode Operations Turn on the 360B and configure it for source lock mode of operation Refer to the 360B VNA opera tion manual Once configured the 360B takes con trol of the signal generator When the 360B takes control the display of all pa rameters on the 681XXC is disabled and the mes sages SS MODE Secure Mode Active and Remote appear on the front panel display 7 13 USE WITH USE WITH A 360B VECTOR OTHER INSTRUMENTS 7 14 Tracking Mode NETWORK ANALYZER Terminating 360B Source Lock Mode Opera tions terminate 3608 VNA source lock mode opera tions you must first return the 681X
203. pressing Edit Pivot again or by making another menu selection Press Edit Slope to open the slope parameter for editing Edit the current slope value using the cur sor control key or rotary data knob or enter a new value using the key pad and the STEPS termination key When you have finished setting the open pa rameter close it by pressing Edit Slope again or by making another menu selection While monitoring the power level at the device under test DUT adjust the power slope and pivot point to level the power at the DUT 681XXC OM LOCAL FRONT PANEL OPERATION LEVELING OPERATIONS User Cal The User Cal user level flatness correction func User Level tion lets you calibrate out path variations with Flatness frequency that are caused by external switching Correction amplifiers couplers and cables in the test setup This is done by means of an entered power offset table from a GPIB power meter or calculated data When user level flatness correction is activated the set power level is delivered at the point in the test setup where the calibration was performed This flattening of the test point power level is accom plished by summing a power offset word from the power offset table with the signal generator s nor mal power level DAC word at each frequency point Up to five user level flatness correction power offset tables from 2 to 801 frequency points table can be created and stored in 681XXC memory
204. r 140 25 32 GHz SDM Section Failed Indicates a failure in the 25 32 GHz switched doubler filter path within the SDM The 681 XXC is still operable but it will not produce an RF output in the 25 32 GHz frequency range Error 141 20 25 GHz SDM Section Failed Indicates a failure in the 20 25 GHz switched doubler filter path within the SDM The 681 XXC is still operable but it will not produce an RF output in the 20 25 GHz frequency range Error 142 Indicates a failure of the sample and hold circuitry on the A10 PCB The 681XXC Sample and Hold Circuit still operates normally but the RF output may be unleveled during square wave Failed modulation Error 143 Indicates a failure of the level slope DAC on the A10 PCB The 681XXC still Slope DAC Failed operates normally but RF output level flatness may be affected during analog frequency sweeps 681XXC OM 6 7 OPERATOR MAINTENANCE Normal Operation Error and Warning Status Messages ERROR AND WARNING STATUS MESSAGES When an abnormal condition is detected during op eration the 681XXC displays an error message to indicate that the output is abnormal or that a signal input or data entry is invalid It also displays warn ing messages to alert the operator to conditions that could cause an inaccurate signal generator output Status messages to remind the operator of current menu selections or settings are also generated Table 6 2 is a summary list o
205. r Level LEVELING OPERATIONS The ALC power slope function lets you compensate for system cable and waveguide variations due to changes in frequency by linearly increasing or de creasing power output as the frequency increases As shown in the following illustration the power slope function provides you with the ability to set both the power slope and the pivot point The ALC loop menu lets you activate the ALC power slope function Power Slope Power Slope we Pivot Point 22 ae Power at DUT D set With Compensation N 6 Power at DUT __ Without Compensation Frequency To goto the ALC Loop Menu from the Level ALC Control Menu display press ALC Loop The ALC Loop Menu below is displayed This menu lets you turn the power slope on or off and edit the slope value and pivot point frequency 3 65 LOCAL FRONT PANEL OPERATION When Power Slope is selected ON this status message is displayed on all menu displays to remind the op erator that a power slopecorrection has been applied to the ALC 3 66 LEVELING OPERATIONS Press Slope On Off to activate the ALC power slope function Press Edit Pivot to open the pivot point frequency parameter for editing Edit the current frequency using the cursor control key or rotary data knob or enter a new value using the keypad and appropriate termination key When you have finished setting the open parameter dose it by
206. r Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 11 dBm dBm 7dBm dBm 10 dBm dBm 6 dBm dBm 9dBm dBm 5 dBm dBm 8 dBm dBm 4 dBm dBm 7 dBm dBm 3 dBm dBm 6 dBm dBm 2 dBm dBm 5 dBm dBm 1 dBm dBm 4 dBm dBm 0 dBm dBm 3 dBm dBm 1 dBm dBm 2 dBm dBm 2 dBm dBm 1 dBm dBm 3 dBm dBm 0 dBm dBm 4 dBm dBm 1 dBm dBm 5 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 7 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 20 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 7 dBm dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 05 to 20 GHz typical not a specification 5 36 681XXC OM OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Level Accuracy Flatness Test Record 19 of 27 Model 68167C Serial No Date Model 68167C without Option 2B Step Attenuator Power Level Accuracy Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz CW Frequency 25 0 GHz Set Power Measured Power Set Power Measured Power Set Power Measured Power 13 dBm dBm 9dBm dBm 6dBm dBm 12 dBm dBm 8dBm dBm 5dBm dBm 11 dBm dBm 7 dBm dBm 4dB
207. rements the list index by one After a reset the list sweep defaults to manual trig ger mode The data display shows the trigger mode the list index current frequency and current power level The list index specifies the current location within the list The current frequency is preceded by the text Fr The current power level is preceded by the text Lv When automatic external or single trigger mode is selected the data display changes to show the trigger mode and list sweep start and stop index values only The list of up to 2000 frequency power level sets is stored in non volatile RAM to preserve any settings after the instrument is powered off The list is not stored with the other setup information in the in strument After a master reset the list is reset to its default state of 2000 index entries of 5 GHz at 0 dBm 681XXC OM 3 41 LOCAL FRONT PANEL OPERATION 3 42 Selecting List Sweep Mode SWEEP FREQUENCY OPERATION To place the 681XXC in list sweep frequency mode press the main menu key CW SWEEP SELECT At the reulting menu display press List The List Sweep Menu below is displayed This menu lets you perform the following Gotothe Edit List menus edit list index fre quency and power level parameters and insert and delete list index entries Edit thelist index parameter Calculate all list index frequency and power level settings Gotothe Sweep menu set sweep st
208. rform the calculations to set the frequency and power levels as it performs the initial list sweep This causes the initial list sweep to take longer than each subsequent sweep Using the PreCalc List soft key lets the initial list sweep be as fast as each subsequent sweep The calculations are stored in volatile RAM and are lost at instrument power off Press PreCalc List to perform list calculations The soft key image depresses to show that calculations arein progress When the calculations are com pleted the soft key returns to normal appearance List editing consists of editing list index frequency and power level parameters and inserting and delet ing list index entries To goto the Edit List Menu below from the List Sweep menu press Edit List Fr GEE Bee GHz List Index Lu T8 dBm AM SEO ore THA Ii This menu lets you perform the following a Gotothe List Frequency Edit menu edit list index frequency parameters Gotothe List Power Edit menu edit list index power level parameters Gotothe Additional Edit List menu insert and delete list index entries 3 43 LOCAL FRONT PANEL OPERATION 3 44 SWEEP FREQUENCY OPERATION List Frequency Edit to go to the List Frequency Edit Menu below press Edit Freq This menu lets you scroll through the list frequencies and edit se lected frequencies The menu displays a total of 20 frequencies The in
209. ritsu product EMC amp LVD information contact Anritsu LTD Rutherford Close Stevenage 501 2EF UK FAX 44 1438 740202 Safety Symbols To prevent the risk of personal injury or loss related to equipment malfunction Anritsu Company uses the following symbols to indicate safety related information For your own safety please read the information carefully BEFORE operating the equipment WARNING WARNING indicates a hazard It calls attention to a procedure that could result in personal injury or loss of life if not performed properly Do not proceed beyond a WARNING notice until the indicated condi tions are fully understood and met CAUTION CAUTION indicates a hazard It calls attention to a procedure which if not performed properly could result in damage to or destruction of a component of the instrument Do not proceed beyond a CAUTION note until the indicated conditions are fully understood and met The instrument is marked with this symbol to indicate that it is neces sary for the user torefer tothe instructions in the operation manual Indicates ground Indicates heavy weight equipment gt 18 kg EE HEAVY WEIGHT 681XXC OM Safety 1 Safety 2 gt 18 kg HEAVY WEIGHT For Safety WARNING When supplying power to this equipment always use a three wire power cable connected to a three wire power line outlet If power is supplied without grounding the equip ment in this manner
210. s 3 16 E Entering Data Setting Increment Sizes 3 88 Error Messages Operation Related 6 8 Self Test 6 3 6 7 F Fixed Power Level Mode Menu Map 4 11 FM Mode Menu Map 4 16 Operating Modes 3 74 Providing FM 3 75 Frequency Scaling 3 81 Front Panel Connectors 3 7 Data Display Area 3 6 3 8 Data Entry Area 3 7 3 12 Description 3 6 Layout 3 6 G General Description 1 3 General Purpose Interface Bus GPIB Address 2 7 Cable Length Restrictions 2 7 Interface Connector 2 7 Line Terminator 2 9 Native Interface Language 2 9 SCPI Interface Language 2 9 Setup and Interconnection 2 7 I Identification Number 1 5 Initial Inspection 2 3 Index 1 SUBJECT INDEX L Leveling Operations ALC Power Slope 3 65 Attenuator Decoupling 3 64 External Leveling 3 61 Fixed Gain 3 63 Internal Leveling 3 61 Menu Map 4 14 Selecting a Leveling Mode 3 60 User Cal User Level Flatness Correction 3 67 List Sweep F requency M ode Menu Map 4 10 M Maintenance Routine Display Cleaning 6 13 Fan Filter Cleaning 6 13 Line Fuse Replacement 6 14 Manual Sweep Frequency Mode Menu Map 4 9 Manual Electronic 1 5 Manual GPIB Programming 1 5 Manual Maintenance 1 6 Manual SCPI Programming 1 5 Master Slave Operation 7 4 Menu Maps AM Mode 4 15 Analog Sweep Frequency Mode 4 7 CW Frequency Mode 4 6 CW Power Sweep Mode 4 12 Description 4 3 Fixed Power Level Mode 4 11 FM Mode 4 16 Lev
211. s Blanking to select a 5V or 5V level for the retrace and bandswitch blanking outputs The retrace blanking and bandswitch blanking signal outputs are both available at the rear panel AUX O connector The display will reflect your selection Press Penlift to select normally open N O or nor mally dosed N C contacts on the internal penlift relay The penlift relay output optionally available at the rear panel is used to lift a plotter pen during retrace The display will reflect your selection Press Marker to select a 5 or 5V level for the video marker output when video markers are se lected ON The video marker signal output is avail able at the rear panel AUX I O connector The display will reflect your selection Press Previous Menu to return to the System Con figuration Menu display 681XXC OM LOCAL FRONT SYSTEM PANEL OPERATION CONFIGURATION Configuring Configuring the RF of the 681XXC involves the fol the RF lowing Selecting whether the RF should be on or off during retrace Selecting whether the RF should be on or off during frequency switching in CW step sweep and list sweep modes Selecting whether a sweep triggered sin gle or external trigger should rest at the top or bottom of the sweep ramp Selecting whether the RF should be on or off at reset Setting the reference multiplier value for fre quency scaling Selecting 40 dB or 0 dB of attenuation when RF
212. s Config The Sys tem Configuration Menu below is displayed Fi Bee B GHz Li dBm EIN HEC 1 Next press GPIB The Configure GPIB Menu be low is displayed ___ Terminator CRLF eve Hode uc m Config GPIE L GPIB Address 681XXC OM LOCAL FRONT PANEL OPERATION 681XXC OM LEVELING OPERATIONS At the Configure GPIB menu press to goto an Additional Configure GPIB Menu below Config GPIE Fur Meter Address 15 Heter An 14282 ___ Language SCFI Press Pwr Mtr Address to change the address of the power meter on the GPIB the power 5 default address is 13 Enter the new address between 1 and 30 using the cursor control key or the data en try key pad and the terminator key Hz ns ADRS The new GPIB address will appear on the display Press Pwr Mir Select to select the power meter model being used Supported power meters are the Anritsu ML2437A ML2438A and ML4803A and Hewlett Packard 4378 438A and 70100A Press Previous Menu to return to the main Config ure GPIB Menu display At the Configure GPIB menu press Previous Menu to return to the System Configuration Menu display Creating a Power Offset Table 681XXC must be in CW frequency mode and fixed non swept power level mode in order to ate a power offset table for user level flatness cor rection Placethe sig
213. s a repetitive OV to 10V ramp output to the rear panel HORIZ OUT BNC connector and AUX I O con nector The CW ramp is used to drive a scalar ana lyzer display To goto the CW Ramp Menu below from the CW menu press CW Ramp Menu This menu lets you set the ramp speed and turn the CW ramp on off To set ramp speed press Sweep Time The sweep time parameter opens for editing Edit the current sweep time using the cursor control key or rotary data knob or enter a new sweep time using the key pad and appropriate termination key The sweep time entered must bein the range of 30 ms to 99 sec To close the open sweep time parameter when you are done press Sweep Time or make an other menu selection Press CW Ramp to turn the CW ramp on While the CW ramp is on the message CW Ramp pears on theright side of frequency title bar on all CW menus Press Previous Menu to return to the CW Menu display 681XXC OM 3 25 LOCAL FRONT SWEEP FREQUENCY PANEL OPERATION OPERATION 3 8 SWEEP FREQUENCY The signal generator can generate broad full range and narrow band OPERATION sweeps across the frequency range of the instrument The 681XXC has four sweep frequency modes analog sweep step sweep manual sweep and list sweep Descriptions and operating instructions for the analog step and manual sweep frequency modes begin on this page List sweep frequency mode descriptions and operating instructions be gin on pa
214. s delivered at the point where the calibration was performed To activate the selected power offset table and apply user level flatness correction to the test setup press On Off The User Level Cal menu will display the status On Toturn off the selected power offset table and re move user level flatness correction from the test setup press On Off again The User Level Cal menu will display the status Off Entering a Power Offset Table via GPIB User level flatness correction can be applied tothe test setup using a power offset table created from calculated data and entered via the GPIB Refer to the 681XXC Programming M anual P N 10370 10334 for information and instructions on creating a power offset table and entering it via the GPIB 3 71 LOCAL FRONT LEVELING PANEL OPERATION OPERATIONS Erasing the Power Offset Tables from Memory The power offset tables are stored in non volatile memory A master reset is required to erase the con tents of the tables and reprogram them with default data To perform a master reset proceed as follows NOTE Step1 With the 681 in standby press The master reset function over hold the RF OUTPUT ON OFF key writes all information stored in the PvE memory with Step2 Press the LINE OPERATE STANDBY key values This includes the nine toturn the instrument on stored front panel setups and the table of 2000 frequency power level Step When
215. s follows PEPEE EEE E EE E E ments When connecting two instruments together for Master Slave opera tions always use a Anritsu Master Slave interface cable set Part ND36329 If Model 56100A Scalar Network Analyzer is being used with the master slave configuration 1 con nect the AUX I O cable end labeled SNA to the rear panel AUX connector the 56100A SNA and 2 connect a dedicated system bus cable P N 2100 1 between the Master instrument rear panel IEEE 488 GPIB connector and 56100A SNA rear panel DEDI CATED GPIB connector Step 1 Connect the 3 port AUX 1 0 cable end la beled MASTER tothe rear panel AUX connector the Master instrument Connect the AUX 1 0 cable labeled SLAVE to the rear panel AUX I O con nector on the Slave instrument Step 2 Connect the ends of the flat interface ca ble to the rear panel Serial I O connectors on the Master and Slave instruments Step 3 Connect one end of a coaxial cable to the rear panel 10 MHz REF OUT connector on the Master instrument Connect the other end to the rear panel 10 MHz REF IN con nector on the Slave instrument 681XXC OM USE WITH OTHER INSTRUMENTS Initiating Master Slave Operation M NOTE Master slave operations areal ways initiated in the CW frequency mode Once initiated you then can Change to a sweep frequ
216. sing its menu soft key or by making another menu selection Press Previous Menu to return to the Level Sweep Menu display 681XXC OM 3 59 LOCAL FRONT PANEL OPERATION 3 11 LEVELING 3 60 OPERATIONS LEVELING OPERATIONS The 681XXC generates leveled output power over a maximum range of up to 33 dB up to 149 dB with Option 2 Instruments with Option 15A provide leveled output power over a maximum range of up to 27 dB up to 141 dB with Option 2 An automatic level control ALC system controls the amplitude and power level of the RF output The operator can select the ALC mode of operation internal external detector or power meter or fixed gain ALC off addition the sig nal generator provides 1 an ALC power slope function that provides compensation for high frequency system or cable losses 2 a decouple function that allows decoupling of the step attenuator if equipped from the ALC system and 3 a user level flatness correction calibra tion function that provides for calibrating out path variations with fre quency in atest setup The following paragraphs provide descriptions and operating instruc tions for the power leveling modes and functions Use the Leveling Modes menu map Chapter 4 Figure 4 10 to follow the menu se quences Selecting a The ALC system is a feedback control system in Leveling which the output power is measured at a detector Mode and compared with the expected power
217. t Provides or 5V signal coincident with sweep re trace Signal polarity selected from a front panel menu L Alternate Sweep Output Provides a TTL low level signal to indicate that the 7 L ALT SWP primary sweep is in progress or a TTL high level signal to indicate that the alter nate sweep is in progress 8 Shield Cable Shield Chassis Ground 9 TRIGGER OUTPUT Trigger Output Provides a TTL low level trigger signal for external devices or in struments Sweep Dwell Output Provides an open collector output which goes to ground 10 SWP DWELL OUT when the sweep is dwelled at the start stop and bandswitching frequencies and at the markers 11 LOCK STATUS Lock Status Output Provides a TTL high level signal when the frequency is phase locked 12 RXb RXb Serial Data Input to the processor t1 13 EXT TRIGGER External Trigger Accepts a TTL low level signal of 1 us width to trigger a sweep FigureA 2 Pinout Diagram AUX 1 Connector 1 of 2 A 4 681XXC OM REAR PANEL CONNECTOR CONNECTORS PINOUT DIAGRAMS PIN SIGNAL NAME SIGNAL DESCRIPTION V GHz Output Provides a reference voltage relative to the RF output frequency 14 V GHz 1 0 V GHz for Models 68117C 68137C and 68147C 0 5 V GHz for Model 68167C 0 25V GHz for Models 68177C 68187C and 68197C 15 EOS INPUT End of Sweep Input Accepts a TTL high level signal to tell the signal generator to begin the end of sweep dwell 16 EOS OUTPUT End of Sweep Outpu
218. t Provides a TTL high level signal when the signal genera tor has begun the end of sweep dwell 17 AUX 1 Aux 1 Auxiliary input output to the processor PB6 18 SWP DWELL IN Sweep Dwell Input Permits a TTL low level signal to stop the sweep in both ana log and step sweep modes The sweep resumes when the signal is removed 19 AUX 2 Aux 2 Auxiliary input output to the processor 20 BANDSWITCH BLANK Bandswitch Blanking Output Provides a 5V or 5V signal coincident with band switching points Signal polarity is selected from a front panel menu 21 SPARE Horizontal Sweep Input Accepts a OV to 10V external sweep ramp from a Master 22 HORIZ IN signal generator This input is automatically selected when the signal generator is in the Slave Mode 23 Return Horizontal Sweep Input return 24 TXb TXb Serial Data Output from the processor 25 MEMORY SEQ Memory Sequencing Input Accepts a TTL low level signal to sequence through nine stored front panel setups Figure 2 Pinout Diagram AUX 1 Connector 2 of 2 681XXC OM A 5 REAR PANEL CONNECTOR CONNECTORS PINOUT DIAGRAMS IEEE 488 GPIB e e SSS PIN SIGNAL NAME SIGNAL DESCRIPTION 1 4 DIO 1 thru DIO 4 Data Input Output Bits are HIGH when the data is logical 0 and LOW when the data is logical 1 End or Identify A low true state indicates that the last byte of a multibyte m
219. tenuator Adds a 10 dB step attenuator with 90 dB range for models having a high end frequency of 60 GHz Rated RF output power is reduced Option 2E 120 dB Electronic Step Attenuator Adds a 10 dB step electronic attenuator with a 120 dB range for models having a high end frequency of 8 4 GHz Rated RF output power is reduced Option 2F 120 dB Electronic Step Attenuator Adds a 10 dB step electronic attenuator with a 120 dB range for models having a high end frequency of lt 20 GHz Rated RF output power is reduced Option 9 Rear Panel RF Output Moves the RF output connector to the rear panel Option 11 0 1 Hz Frequency Resolution Provides fre quency resolution of 0 1 Hz Option 14 Rack Mounting without Chassis Slides Modifies rack mounting hardware to install unit in a console that has mounting shelves Includes mounting ears and front panel handles Option 15A High Power Output Adds high power RF components to the instrument in the 2 20 GHz frequency range Option 15A is standard in models having a high end frequency that is gt 40 GHz Option 16 High Stability Time Base Adds an ovenized 10 MHz crystal oscillator as a high stability time base Option 17A Delete Front Panel Deletes the front panel for use in remote control applications where a front panel display and keyboard control are not needed Option 18 mmWave Module Bias Output Provides bias output for 54000 xWRxx Millimeter Wave Source Modules BNC Twinax co
220. tep Attenuator Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 11 dBm dBm 15 dBm dBm 10 dBm dBm 14 dBm dBm 9dBm dBm 13 dBm dBm 8dBm dBm 12 dBm dBm 7dBm dBm 11 dBm dBm 6dBm dBm 10 dBm dBm 5 dBm dBm 9dBm dBm 4dBm dBm 8 dBm 3 dBm dBm 7 dBm dBm 2dBm dBm 6dBm dBm 1 dBm dBm 5 dBm 0dBm dBm 4dBm dBm 1 dBm dBm 3 dBm dBm Specification is 1 0 dB Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 4 0 dB 0 01 to 0 05 GHz 1 6 dB 0 05 to 8 4 GHz Power Level Flatness Analog Sweep Set Power Max Power Min Power Variation 11 dBm dBm dBm dB Maximum variation is 7 0 dB 0 01 to 0 05 GHz 6 0 dB 0 05 to 8 4 GHz typical not a specification 681XXC OM 5 23 OPERATION POWER LEVEL ACCURACY VERIFICATION AND FLATNESS TESTS Table 5 3 Power Leve Accuracy Flatness Test Record 6 of 27 Model 68117C w Option 15A Serial No Date Model 68117C with Option 15A High Power with Option 2E Step Attenuator Power Level Accuracy Power Level Accuracy CW Frequency 1 0 GHz CW Frequency 5 0 GHz Set Power Measured Power Set Power Measured Power 11 dBm dBm 11 dBm dBm 10 dBm dBm 10 dBm dBm 9dBm dBm 9dBm dBm 8 dBm 8dBm dBm 7 dBm dBm 7 dBm dBm 6 dBm d
221. the first menu is displayed after Sets used for list sweep mode the start up display release the OUT PUT ON OFF key The contents of non volatile memory have now been erased and reprogrammed with default data 3 72 681XXC OM LOCAL FRONT PANEL OPERATION 3 12 AM Sensitivity mm Impedance 681XXC OM SIGNAL MODULATION The signal generator provides AM FM and square wave modulation of the output signal All modulation modes AM FM and square wave can be active simultaneously The following paragraphs provide descriptions and operating instructions for each modulation mode Use the Amplitude M odulation M ode F requency Modulation Mode and Square Wave Modulation Mode menu maps Chapter 4 Figures 4 11 4 12 and 4 13 to follow the menu sequences Amplitude Modulation Operating Modes Providing Amplitude Modulation The signal generator has two AM operation modes Linear AM and Log AM In Linear AM mode sensitivity is continuously variable from 0 V to 100 V The amplitude of the RF output changes linearly as the external AM input changes In Log AM mode sensitivity is continuously vari able from 0 dB V to 25 dB V The amplitude of the RF output changes exponentially as the AM input changes To provide amplitude modulation first set up the external signal generator then connect it to either the 681XXC front or rear panel AM I
222. the user level flatness correction OUTPUT ON OFF key function The contents of non volatile memory have now been erased and reprogrammed with default data 3 90 681XXC OM LOCAL FRONT SECURE PANEL OPERATION OPERATION 3 15 SECURE OPERATION 681XXC be operated a secure mode of operation this secure mode the display of all frequency power level and modulation parameters is disabled during both local front panel and remote GPIB operations The instrument will continue to function normally in all other respects The following paragraphs describe how to place the signal generator in secure mode and how to return to normal op eration To place the 681XXC in the secure mode first press a to display the System Menu Next press Secure This places the signal genera tor in the secure mode and the Secure Menu below is displayed Secure Mode Active L Selftest NOTE During secure mode all main menu keys and menu soft keys operate normally The menu soft key labels are displayed and change with menu selections Only the parameter display is disabled Toreturn the 681XXC to unsecured normal opera tion press 1918 then press Reset 681XXC OM 3 91 REFERENCE LOCAL FRONT PANEL OPERATION OSCILLATOR CALIBRATION 3 16 REFERENCE OSCILLATOR CALIBRATION This calibration is not applicableto units having Option16 High Sta bility Time Base installed 3 92 T
223. trol of the Anritsu 360B Vector Network Ana lyzer the synthesized signal generator is phase locked at a typical lt 8 5 ms step sweep speed Frequency resolution is limited to 100 kHz Minimum specified frequency is 2 1 GHz for model 68137C LIST SWEEP MODE Under GPIB control or via the front panel up to 4 tables with 2000 non sequential frequency power sets can be stored and the addressed as a phase locked step sweep One table of 2000 points is stored in non volatile memory all other tables are stored in volatile memory Switching Time typical maximum Units having a high end frequency of 20 GHz lt 25 ms to be within 1 kHz of final frequency Units having a high end frequency of 8 4 GHz lt 5 ms to be within 1 kHz of final frequency PROGRAMMABLE FREQUENCY AGILITY Under GPIB control up to 3202 non sequential frequency power sets can be stored and then addressed as a phase locked step sweep Data stored in volatile memory Switching Time typical maximum Units having a high end frequency of 20 GHz lt 25 ms to be within 1 kHz of final frequency Units having a high end frequency of 8 4 GHz lt 5 ms to be within 1 kHz of final frequency MARKERS Up to 20 independent settable markers FO F9 and MO 9 Video Markers 5V or 5V marker output selectable from system menus AUX I O connector rear panel Intensity Markers Available in Analog Sweeps of lt 1 Second Sweep Time Produces an intensified dot
224. ts or 20 meters whichever is less NOTE For low EMI applications the GPIB cable should be a fully shielded type with well grounded metal shell connectors The only interconnection required for GPIB opera tion is between the signal generator and the control ler This interconnection is via a standard GPIB cable The Anritsu Part number for such a cable is 2000 1 2 or 4 1 2 or 4 meters in length The default GPIB address is 5 If a different GPIB address is desired it can be set from the front panel using the Configure GPIB Menu To change the GPIB address first press the front panel main menu key labeled The Sys tem Menu shown on the following page is dis played 2 7 INSTALLATION 2 8 GPIB SETUP AND INTERCONNECTION B GHz i AM LE Now press the menu soft key m The System o Menu below is displayed To go to the Configure GPIB menu from this menu press the menu soft key GPIB The Configure GPIB Menu below is displayed Config GPIB GPIB Address ___ Terminator CRLF E d OFF Press the menu soft key GPIB Address to change the current GPIB address of the signal generator Enter a new address using the cursor control key or the data entry keypad and the terminator key Hz ns ADRS The new GPIB address will now appear on the dis play The entry must be between 1 and 30 to be rec ognized as a valid GPI
225. ty Green Luton Bedfordshire LU1 3LU England Telephone 015 82 433200 FAX 015 82 731303 2 14 681XXC OM Chapter 3 Local Front Panel Operation Table of Contents 3 1 INTRODUCTION 3 2 4 4 rmx dere ae R3 3 5 3 2 FRONT PANEL LAYOUT 224 4044 3 6 LineKey 3 6 Data Display Area 3 6 Data Entry 3 7 RF Output Control Key 3 7 CODIGOS 3 7 3 3 DATA DISPLAY 3 8 Menu Display Format 3 9 3 10 3 4 DATA ENTRY 3 12 3 5 INSTRUMENT 5 3 14 Powering Up the 681XXC 3 14 Start U p Display 3 14 Standby Operation 3 14 Self Testing the 681XXC 3 15 Resetting to Default Parameters 3 15 3 6 ENTERING p icra aa SUR 3 18 Opening the Parameter 3 18 Editing the Current Value 3 19 Entering a New Value 3 20 Table of Contents Continued 3 2 CW FREQUENCY OPERATION 4 yu xxx x3 3 21 Selecting CW Mode 3 21 Selecting a CW Frequency 3 22 Selecting a PowerLevel 3 24 CW RAMP e moe aai de aa ah me 2 3 25 SWEEP FREQUENCY OPERATION 3 26 Analog Sweep Mode 3 26 Selecting Analog Swee
226. ualified service technician Error 102 DVM Negative 10V Reference Indicates either a calibration related problem or a defective 10 Volt reference Do not Attempt to Operate Refer the instrument to a qualified service technician Error 105 Power Supply Voltage s out of Regulation Indicates one or more of the voltages from the power supply are out of regulation Do Not Attempt to Operate Refer the instrument to a qualified service technician Error 106 Power Supply not Locked Indicates the power supply is not phase locked to the 400 kHz reference frequency The 681XXC is still operable in a degraded mode The RF output may contain more spurious signals than normal Error 107 Sweep Time Check Failed Indicates the sweep timing is out of tolerance or has failed If analog sweeps can be obtained the 681 is still operable in a degraded mode If analog sweeps can not be obtained the 681XXC is operable only in CW or step sweep frequency modes Error 108 Crystal Oven Cold Indicates the 100 MHz crystal oven or the Option 16 high stability 10 MHz crystal oscillator has not reached operating temperature The 681 XXC is still operable but frequency accuracy and stability may be degraded Error 109 The 100MHz Reference is not Locked to the External Reference Indicates the reference loop is not phase locked to the external 10 MHz reference The reference loop may phase lock to the internal 100 MHz time
227. uator 0 ALC Power User Cal User Level Flatness Correction SIGNAL MODULATION Amplitude Modulation Operating Modes Providing Amplitude Modulation Frequency Modulation Operating Modes Providing Frequency Modulation Square Wave Modulation Operating Modes Providing Square Wave Modulation SYSTEM Configuring the Front Panel Configuring the Rear Panel ConfiguringtheRF Configuring the GPIB Setting Increment Sizes SAVING RECALLING INSTRUMENT SETUPS Saving Setups uu osos Rom ox Xo Re XE meom cs Recalling Setups Erasing Stored Setups SECURE OPERATION REFERENCE OSCILLATOR CALIBRATION 3 3 3 1 INTRODUCTION 681XXC OM Chapter 3 Local Front Panel Operation This chapter provides information and instructions on operating the Series 681XXC Synthesized Signal Generator using the front panel controls It contains the following a Illustrations and diagrams of the front panel data display area and data entry area that identify and describe all front panel controls inputs and outputs An annotated diagram of the menu display format showing where the current frequency power and modulation information is displayed a Instructions for performing signal

Anritsu 681XXC Portable Generator User Manual

Contents

Download Pdf Manuals

Related Search

Related Contents