Wiltron 680XXB, Operation Manual

Page 1: ...JARVIS DRIVE MORGAN HILL CA 95037 2809 SERIES 681XXB SYNTHESIZED SWEEP GENERATOR OPERATION MANUAL Serial Number 512001 and above P N 10370 10298 REVISION B PRINTED AUGUST 1995 COPYRIGHT 1995 WILTRON...

Page 2: ...oes not apply to defects resulting from improper or inadequate mainte nance by the Buyer unauthorized modification or misuse or operation outside of the environmental specifications of the product No...

Page 3: ...r the Declaration of Conformity page Changed November 1995 2 Page 1 4 Replace with enclosed pages 1 3 and 1 4 Changed November 1995 3 Pages 2 3 thru 2 6 Replace with enclosed pages 2 3 thru 2 6 Change...

Page 4: ...11 Page A 2 Replace with enclosed pages A 1 and A 2 Changed November 1995 12 Pages B 2 thru B 5 Replace with enclosed pages B 1 thru B 6 Changed November 1995 PCOs 22121 22151 and 22191 C 2 681XXB OM...

Page 5: ...Products Synthesized CW Sweep Signal Generators Models 680XXB 681XXB 682XXB 683XXB Standards EN 55011 1991 Group 1 Class A EN 50082 1 1992 IEC 801 2 1991 Level 3 IEC 801 3 1984 Level 2 IEC 801 4 1988...

Page 6: ...formed 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 pe...

Page 7: ...ctrical shock or damage to precision components do not remove the equipment covers WARNING For Safety Before changing the fuse always remove the power cord from the power outlet There is the risk of r...

Page 8: ...following the tab Chapter 4 Local Operation Menu Maps Chapter 4 provides menu maps that support the local front panel operating instructions found in Chapter 3 It includes menu maps for all of the fre...

Page 9: ...escriptions for the AUX I O and IEEE 488 GPIB connectors Appendix B Performance Specifications Appendix B lists the performance specifications for the Series 681XXB Synthesized Sweep Generator Supplem...

Page 10: ...DESCRIPTION 1 3 1 4 IDENTIFICATION NUMBER 1 6 1 5 RELATED MANUALS 1 6 GPIB Programming Manual 1 6 SCPI Programming Manual 1 6 Maintenance Manual 1 6 1 6 OPTIONS 1 7 1 7 PERFORMANCE SPECIFICATIONS 1 8...

Page 11: ...Figure 1 1 Series 681XXB Synthesized Sweep Generator...

Page 12: ...anuals options and performance specifications A listing of recommended test equip ment is also provided 1 3 DESCRIPTION The Series 681XXB Synthesized Sweep Generators are microprocessor based synthesi...

Page 13: ...GHz 2 0 20 0 GHz 20 0 40 0 GHz 13 0 dBm 9 0 dBm 6 0 dBm 11 0 dBm 7 0 dBm 3 0 dBm 68175B 0 5 2 2 GHz 2 2 20 0 GHz 20 0 40 0 GHz 40 0 50 0 GHz 11 0 dBm 10 0 dBm 2 5 dBm 2 5 dBm 10 0 dBm 8 5 dBm 0 0 dBm...

Page 14: ...13 0 dBm 10 0 dBm 11 0 dBm 11 0 dBm 7 5 dBm 68159B 0 01 2 0 GHz 2 0 20 0 GHz 20 0 26 5 GHz 13 0 dBm 13 0 dBm 10 0 dBm 11 0 dBm 11 0 dBm 7 5 dBm 68163B 2 0 20 0 GHz 20 0 40 0 GHz 13 0 dBm 6 0 dBm 11 0...

Page 15: ...ta transfer and control functions a com plete listing and description of all 681XXB GPIB Product Specific commands and several program ming examples The WILTRON part number for the GPIB Programming Ma...

Page 16: ...a 10 dB per step attenuator with a 90 dB range for models having a high end fre quency of 60 GHz Output power is selected directly in dBm on the front panel or via GPIB Rated RF output power is reduce...

Page 17: ...Time Base Input 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 Power Meter with Power S...

Page 18: ...5 Warmup Time 2 6 Operating Environment 2 6 2 4 GPIB SETUP AND INTERCONNECTION 2 7 Interface Connector 2 7 Cable Length Restrictions 2 7 GPIB Interconnection 2 7 Setting the GPIB Address 2 7 Selecting...

Page 19: ...een checked against the packing list and the sweep gener ator has been checked for mechanical and electrical operation If the shipment is incomplete or if the sweep generator is damaged me chanically...

Page 20: ...nge 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 print...

Page 21: ...ure On the front panel press LINE to switch the 681XXB from OPERATE green LED on to STANDBY orange LED on NOTE During standby operation the fan runs continuously PREPARATION INSTALLATION FOR USE LINE...

Page 22: ...e following en vironmental limits Temperature 0 C to 50 C 32 F to 122 F Humidity 5 to 95 relative at 40 C Altitude up to 4600 meters approximately 15 000 feet Cooling Internal cooling is provided by f...

Page 23: ...e 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 restrictions are as follows No more than 15 inst...

Page 24: ...played Press the menu soft key GPIB Address to change the current GPIB address of the sweep generator Enter a new address using the cursor control key or the data entry keypad and the terminator key H...

Page 25: ...enerators 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 681XXB GPIB Product Specific command...

Page 26: ...se two options is possible instructions for packaging and shipment are given below Use a Suitable Container Obtain a corrugated cardboard carton with a 275 pound test strength This carton should have...

Page 27: ...016 44 61 065 GERMANY ANRITSU WILTRON GmbH Rudolf Diesel Strabe 17 8031 Gilching Telephone 08 10 58 055 FAX 08 10 51 700 INDIA MEERA AGENCIES P LTD A 23 Hauz Khas New Delhi 110 016 Telephone 011 685 3...

Page 28: ...t Control Key 3 7 Connectors 3 7 3 3 DATA DISPLAY AREA 3 8 Menu Display Format 3 9 Menu Keys 3 10 3 4 DATA ENTRY AREA 3 12 3 5 INSTRUMENT START UP 3 12 Powering Up the 681XXB 3 12 Start Up Display 3 1...

Page 29: ...etting Step Size and Dwell Time 3 27 Selecting Manual Sweep Mode 3 28 Selecting a Sweep Range 3 29 Selecting a Power Level 3 31 Frequency Markers 3 32 Selecting Alternate Sweep Mode 3 34 3 9 FIXED POW...

Page 30: ...cy Modulation Operating Modes 3 62 Providing Frequency Modulation 3 63 Square Wave Modulation Operating Modes 3 65 Providing Square Wave Modulation 3 65 3 13 SYSTEM CONFIGURATION 3 68 Configuring the...

Page 31: ...panel data display area and data entry area that identify and describe all front panel con trols inputs and outputs An annotated diagram of the menu display format showing where the current frequency...

Page 32: ...ur rent status of the 681XXB in a menu display for mat This information includes the operating mode of the instrument the value of the active frequency and power level parameters and the modulation st...

Page 33: ...ors 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 Externa...

Page 34: ...the menu display and identifies the dis play elements It also shows the placement of the menu keys in rela tion to the display The paragraphs that follow provide descriptions of the menu display elem...

Page 35: ...le Bars Each 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 c...

Page 36: ...of each main menu follows CW SWEEP SELECT This menu lets you select between CW Analog Step and Manual Sweep frequency modes FREQUENCY CONTROL In CW frequency mode this menu lets you select the CW fre...

Page 37: ...The cursor is displayed on all sub menus of the current menu until a differ ent main menu key is pressed When the SYSTEM key is pressed the System menu is displayed The System menu and its sub menus d...

Page 38: ...used to increase or de crease the value of the parameter The unit size of the increase or decrease that occurs each time the or pad is pressed is determined by the cursor posi tion In addition when ed...

Page 39: ...he param eter s value increases or decreases 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 k...

Page 40: ...until the sweep gener ator has loaded all programs Upon completion of power up the 681XXB returns to the exact configuration it was in when last turned off Standby Operation Whenever the sweep genera...

Page 41: ...ault Pa rameters You can reset the 681XXB to the factory selected de fault parameter values at any time during normal operation The default parameters are shown in Ta ble 3 1 on the following page NOT...

Page 42: ...0 40 0 2 0 5 0 8 0 11 0 14 0 17 0 20 0 1 0 68175B 3 5 2 2 50 0 2 0 5 0 8 0 11 0 14 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 68177B 3 5 2 0 50 0 2 0 5 0 8 0 11 0 14 0 17 0 20 0 3 5...

Page 43: ...dB 68165B 50 ms 50 ms 50 50 ms 50 0 0 dB 68169B 50 ms 50 ms 50 50 ms 50 0 0 dB 68175B 50 ms 50 ms 50 50 ms 50 0 0 dB 68177B 50 ms 50 ms 50 50 ms 50 0 0 dB 68185B 50 ms 50 ms 50 50 ms 50 0 0 dB 68187B...

Page 44: ...arameters If you wish to follow along on your synthesizer you can obtain this same menu display by resetting your instrument press SYSTEM then press Reset Opening the Parameter In order for the value...

Page 45: ...urn the knob clock wise or counter clockwise to increase or decrease the value of the parameter by the unit size Turning the knob rapidly changes the value of the parame ter in larger steps Using a Se...

Page 46: ...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 s or ns however it is always displayed on the data display in Sec If...

Page 47: ...e CW frequency mode Selecting a CW Frequency There are several ways to select a CW frequency for output You can 1 edit the current frequency 2 en ter a new frequency or 3 select one of the 20 pre set...

Page 48: ...tag edit or output a frequency from the list Use the cursor control key to select a frequency from the frequency list The selected frequency is highlighted in reverse video and displayed in full be lo...

Page 49: ...Scan Dn keys Return to the CW Frequency Control menu by press ing Previous Menu Selecting a Power Level While in the CW frequency mode you can edit the current CW frequency output power level or enter...

Page 50: ...s 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 da...

Page 51: ...cies and at each band switch point When the sweep width is 100 MHz only the center frequency of the sweep is phase lock corrected To place the 681XXB in analog sweep frequency mode press the main menu...

Page 52: ...ter for editing press Sweep Time Edit the current sweep time using the cursor control key or the rotary data knob or en ter a new sweep time using the key pad and appro priate termination key To close...

Page 53: ...le 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 Analog Sweep Trigger menu below from the Analog Sweep Ramp...

Page 54: ...tep sweep menu To place the 681XXB 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 This menu l...

Page 55: ...ss Step Size to open the step size parameter Press Num 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...

Page 56: ...steps between the start and stop frequencies are controllable from the manual sweep menu To place the 681XXB in manual sweep frequency mode press the main menu key CW SWEEP SELECT At the resulting me...

Page 57: ...pens the stop frequency parame ter 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...

Page 58: ...termined by the dF fre quency parameter F6 dF provides a symmetrical frequency sweep about the center frequency F6 The sweep width is determined by the dF fre quency parameter To select one of the pre...

Page 59: ...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 ke...

Page 60: ...er produces an intensified dot on a CRT display at each marker fre quency Intensity markers are only available in the analog sweep frequency mode and are obtained from a momentary dwell during the swe...

Page 61: ...eady 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 qu...

Page 62: ...play below To go to the Alternate Sweep menu below from the Step Sweep menu press Alt Swp Menu This menu lets you perform the following Turn the alternate sweep mode on off Go to the alternate range m...

Page 63: ...rn to the Alter nate Sweep menu Selecting an Alternate Sweep Range To go to the Alternate Range menu below from the Alternate Sweep menu press Alt Range Select the alternate sweep range Full F1 F2 F3...

Page 64: ...evel 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 sweep When you are done selecting the power level...

Page 65: ...ss the main menu key LEVEL ALC SELECT At the resulting menu display press Level The Level Menu below is displayed This menu lets you perform the following Edit the power level parameter Edit the level...

Page 66: ...the following Select preset power levels L0 L1 L2 L3 or L4 for output Go to the Level List menu Go to the Tagged Levels menu Level List To go to the Level List menu below press Level List This menu le...

Page 67: ...ct 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 finishe...

Page 68: ...ue and apply it to the dis played power level go to the Level Menu Then press Edit Offset As shown in the following menu this opens the offset parameter for editing Edit the current offset value using...

Page 69: ...CW fre quency Menus provided let you set or select the sweep range the step size the dwell time per step and the sweep trigger To place the 681XXB in a CW power sweep mode from a CW frequency menu pre...

Page 70: ...Step Size to open the step size parameter Press Num 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...

Page 71: ...en the trigger key is pressed If a sweep is in pro gress when the key is pressed it aborts and re sets To go to the CW Level Sweep Trigger menu from the CW Level Sweep Ramp menu press Trigger Menu To...

Page 72: ...ent power level sweep range start by opening either the start or stop power level pa rameter in the display above Edit L1 opens the start power level parameter Edit L2 opens the stop power level param...

Page 73: ...or 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 L9 L0 that you wish to set The menu th...

Page 74: ...lect 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 ke...

Page 75: ...ameter Press Num 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...

Page 76: ...ns with fre quency in a test 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...

Page 77: ...menu To go to the Leveling Menu from the ALC Mode menu press Leveling Menu The Leveling Menu below is displayed To select internal ALC press Internal Pressing one of the other leveling menu soft keys...

Page 78: ...the external ALC input from an external detector press External Detector To select the external ALC input from a power me ter press Power Meter After you have made the external ALC input connec tion a...

Page 79: ...nstalled 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 the leveling menu Press Leveling...

Page 80: ...nu below is displayed 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 A...

Page 81: ...both the power slope and the pivot point The ALC loop menu lets you activate the ALC power slope function To go to the ALC Loop Menu from the Level ALC Control Menu display press ALC Loop The ALC Loo...

Page 82: ...r 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...

Page 83: ...el is accom plished by summing a power offset word from the power offset table with the sweep generator s nor mal power level DAC word at each frequency point Up to five user level flatness correction...

Page 84: ...oint in the test setup where the corrected power level is desired Power Meter Model and GPIB Address In order for the 681XXB to control the power meter the GPIB address and power meter model must be s...

Page 85: ...meters are the Anritsu ML4803A and Hewlett Packard 437B 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...

Page 86: ...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 curre...

Page 87: ...ting the power offset table the set power level is delivered at the point where the calibration was performed To activate the selected power offset table and apply user level flatness correction to th...

Page 88: ...OUTPUT ON OFF key Step 2 Press the LINE OPERATE STANDBY key to turn the instrument on Step 3 When the first menu is displayed after the start up display release the RF OUT PUT ON OFF key The contents...

Page 89: ...itivity 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 Providing Amplitude Modulation To provide amplitude modulation fir...

Page 90: ...selection Frequency Modulation Operating Modes The sweep generator has two FM operation modes Locked FM and Unlocked FM In Locked FM mode frequency modulation of the output signal is accom plished by...

Page 91: ...w press the menu soft key More The additional External FM Status Menu below is displayed This menu lets you select the FM operating mode Press Locked to select the Locked FM operating mode press Unloc...

Page 92: ...ur 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 is 1 kHz V to 20 MHz V for Locked and Unlocked Narrow FM modes...

Page 93: ...wing are the menu selections necessary to provide square wave pulse modulation of the out put signal using a modulating signal from both the internal and external sources Press MODULATION At the resul...

Page 94: ...ch 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 go to the additional menu Internal Source Frequency Selection If you hav...

Page 95: ...ce then when you press More the menu below is displayed Press Front Rear to select the front or rear panel IN connector The Square Wave status display shows your selection as Source Press Previous Men...

Page 96: ...ne terminator and incre ment sizes for frequency power level and time parameters Use the System Configuration menu map Chapter 4 Figure 4 13 to follow the menu sequences To go to the System Configurat...

Page 97: ...from the System Configuration menu press Front Panel The Configure Front Panel Menu below is dis played Press Brite repeatedly to increase the intensity of the data display to the desired level Press...

Page 98: ...king signal output is available at the rear panel AUX I O connec tor The display will reflect your selection Press Penlift to select normally open N O or nor mally closed N C contacts on the internal...

Page 99: ...ect your selection Press Delta F RF to select RF On or Off during fre quency switching in CW or step sweep modes The display will reflect your selection Press Ramp Rest to select 0 or 10 for the ramp...

Page 100: ...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 Li...

Page 101: ...n Press Pwr Mtr Address to change the address of the power meter on the GPIB the power meter s de fault GPIB address is 13 Enter a new address be tween 1 and 30 using the cursor control key or the dat...

Page 102: ...splayed 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 pa rameter Open the parameter...

Page 103: ...mber 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...

Page 104: ...ERATE STANDBY key to turn the instrument on Step 3 When the first menu is displayed after the start up display release the RF OUTPUT ON OFF key The contents of non volatile memory have now been erased...

Page 105: ...cure mode and how to return to normal op eration To place the 681XXB in the secure mode first press SYSTEM to display the System Menu Next press Secure This places the sweep gener ator in the secure m...

Page 106: ...Table of Contents 4 1 INTRODUCTION 4 3 4 2 MENU MAP DESCRIPTION 4 3 Chapter 4 Local Operation Menu Maps...

Page 107: ...f each menu s soft keys is provided If a menu soft key se lects another menu then it is shown linked to that menu Figure 4 1 on page 4 5 is a sample menu map annotated to identify the key ele ments Th...

Page 108: ...nt Power Level CW Ramp On Off Set The Sweep Time Typical Menu Soft Key Functional Description Points To The Menu Displayed Whenever The Menu Soft Key Is Depressed A Main Menu Display Main Menu Key Cur...

Page 109: ...d Frequency Edit Current Power Level Edit Current Frequency Edit Current Power Level Edit Current Power Level On Off Set The Sweep Time Set Slave DF Frequency Set Slave Main Power Level Master Slave O...

Page 110: ...quency Edit Current Sweep Time On Off On Off On Off On Off Edit Start Frequency Edit End Frequency Edit Current Power Level Tag Untag Highlighted Marker Frequency Edit Highlighted Marker Frequency On...

Page 111: ...eep Stop Frequency Edit Main Sweep Power Level Edit Start Frequency Edit End Frequency Edit Current Sweep Time On Off On Off On Off On Off Edit Start Frequency Edit End Frequency Edit Current Power Le...

Page 112: ...MODULATION CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL Edit Start Frequency Edit End Frequency Edit Start Frequency Edit End Frequency Edit Current Power Level Edit Step Size Edit...

Page 113: ...NTROL Display Showing Level Offset On Edit Current Power Level Output Previous Tagged Power Level Edit Current Power Level Tag Untag Highlighted Power Level Edit Highlighted Power Level Output Highlig...

Page 114: ...TION CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL On Off Edit Step Size Edit Dwell TIme On Off On Off Edit Number of Steps Edit End Power Level Edit Start Power Level Edit End Powe...

Page 115: ...REQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL SYSTEM MODULATION CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL Edit Start Power Level Edit End Power Level Edit Start Power Level Ed...

Page 116: ...tion 10dB Steps Press To Decrease Attenuation 10dB Steps ALC Slope On Off Edit The ALC Slope Edit The Pivot Point Selects Front Panel External ALC Input Selects Rear Panel External ALC Input Adjust th...

Page 117: ...f 600 or 50 Input Impedance Log AM 0 25dB V or Linear AM 0 100 V Edit AM Sensitivity Front Panel Input or Rear Panel Input SYSTEM CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL MODUL...

Page 118: ...ance Edit FM Sensitivity Front Panel Input or Rear Panel Input SYSTEM CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL MODULATION Display Showing FM Selected On Select Locked FM Mode S...

Page 119: ...are Wave Source LOW Level Triggers RF or HIGH Level Triggers RF Select Frequency Square Wave Modulation On Off Internal Square Wave Source or External Square Wave Source LOW Level Triggers RF or HIGH...

Page 120: ...Terminator Brightens The Display Dims The Display Select RF On or Off During Retrace Select Reset For Single Sweep 0 For Bottom of Sweep Ramp 10 For Top of Sweep Ramp Select RF On or Off During Frequ...

Page 121: ...ower Up 5 4 Self Test 5 4 Resetting the 681XXB 5 4 Warmup Time 5 4 5 5 CW FREQUENCY ACCURACY TEST 5 5 Test Setup 5 5 Test Procedure 5 6 5 6 POWER LEVEL ACCURACY AND FLATNESS TESTS 5 13 Test Setup 5 13...

Page 122: ...These tables are included as part of the operational verifica Instrument Critical Specification Recommended Manufacturer Model Frequency Counter with Cable Kit and External Mixer Range 0 01 to 65 GHz...

Page 123: ...tor to in sure proper operation of the instrument PCBs and other internal assemblies To self test the signal generator press SYSTEM Then press the System Menu soft key Selftest When the self test is c...

Page 124: ...ggle switch ensure the switch is set to EXT Step 2 Connect the 681XXB RF OUTPUT to the Frequency Counter RF Input as follows a For measuring frequencies of 0 01 to 1 0 GHz connect to the Band 2 input...

Page 125: ...unter read ing meets specifications 100 Hz of the value shown on the test record for stand ard models 10 Hz for instruments with Option 11 Step 3 Record the Frequency Counter reading on the test recor...

Page 126: ...___________ 2 000 002 000 _____________________ 2 000 003 000 _____________________ 2 000 001 000 _____________________ 2 000 004 000 _____________________ 2 000 002 000 _____________________ 2 000 00...

Page 127: ...00 000 _____________________ 46 000 000 000 _____________________ 38 000 000 000 _____________________ 50 000 000 000 _____________________ 40 000 000 000 _____________________ 2 000 001 000 _________...

Page 128: ..._ 50 000 000 000 _____________________ 50 000 000 000 _____________________ 54 000 000 000 _____________________ 54 000 000 000 _____________________ 58 000 000 000 _____________________ 58 000 000 00...

Page 129: ...__________________ 2 000 000 100 0 _____________________ 2 000 000 200 0 _____________________ 2 000 000 300 0 _____________________ 2 000 000 100 0 _____________________ 2 000 000 400 0 _____________...

Page 130: ...00 000 000 0 _____________________ 35 000 000 000 0 _____________________ 46 000 000 000 0 _____________________ 38 000 000 000 0 _____________________ 50 000 000 000 0 _____________________ 40 000 00...

Page 131: ...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 0...

Page 132: ...tep 2 Connect the Power Sensor to the RF OUT PUT of the 681XXB NOTE For 40 GHz models use the K male to 2 4 mm female adapter to connect the Power Sensor to the RF OUTPUT connector Step 3 Connect the...

Page 133: ...e current power level parameter for editing e Set L1 to the power level noted on the test record Step 2 Measure the output power level with the Power Meter and record the reading on the test record St...

Page 134: ...set The CW Menu is displayed b Press Step to place the 681XXB in the step sweep frequency mode and dis play the Step Sweep Menu below c With the Step Sweep menu displayed press the main menu key FREQU...

Page 135: ...ond NOTE Monitor the 681XXB s Horizontal Output on the Oscilloscope to deter mine sweep start and stop Step 2 As the 681XXB steps through the full fre quency range measure the maximum and minimum Powe...

Page 136: ...ith the Analog Sweep menu dis played press the main 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...

Page 137: ...81XXB s Horizontal Output on the Oscilloscope to deter mine sweep start and stop Step 4 During the analog sweep measure the maximum and minimum Power Meter readings and record the values on the test r...

Page 138: ...m _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Ma...

Page 139: ..._________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max...

Page 140: ..._______dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm Specification is 1 0 dB Power Level Flatness S...

Page 141: ..._____dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm Specification is 1 0 dB Power Level Flatness Ste...

Page 142: ...m _________dBm _________dBm 13 dBm 12 dBm 11 dBm 10 dBm 9 dBm 8 dBm 7 dBm 6 dBm 5 dBm 4 dBm 3 dBm 2 dBm 1 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm...

Page 143: ..._________dBm _________dBm 11 dBm 10 dBm 9 dBm 8 dBm 7 dBm 6 dBm 5 dBm 4 dBm 3 dBm 2 dBm 1 dBm 0 dBm 1 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm __...

Page 144: ...____dBm _________dBm _________dBm _________dBm 17 dBm 16 dBm 15 dBm 14 dBm 13 dBm 12dBm 11 dBm 10 dBm 9 dBm 8 dBm 7dBm 6 dBm 5 dBm _________dBm _________dBm _________dBm _________dBm _________dBm ____...

Page 145: ...__dBm _________dBm _________dBm _________dBm 15 dBm 14 dBm 13 dBm 12 dBm 11 dBm 10 dBm 9 dBm 8 dBm 7 dBm 6 dBm 5 dBm 4 dBm 3 dBm _________dBm _________dBm _________dBm _________dBm _________dBm ______...

Page 146: ...Bm 11 dBm 10 dBm 9 dBm 8 dBm 7 dBm 6 dBm 5 dBm 4 dBm 3 dBm 2 dBm 1 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm...

Page 147: ...9 dBm 8 dBm 7 dBm 6 dBm 5 dBm 4 dBm 3 dBm 2 dBm 1 dBm 0 dBm 1 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm ___...

Page 148: ..._dBm 17 dBm 16 dBm 15 dBm 14 dBm 13 dBm 12dBm 11 dBm 10 dBm 9 dBm 8 dBm 7dBm 6 dBm 5 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _______...

Page 149: ...Bm 15 dBm 14 dBm 13 dBm 12 dBm 11 dBm 10 dBm 9 dBm 8 dBm 7 dBm 6 dBm 5 dBm 4 dBm 3 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________...

Page 150: ...Bm 3 dBm 4 dBm 5 dBm 6 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm Spec...

Page 151: ...dBm 5 5 dBm 6 5 dBm 7 5 dBm 8 5 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _______...

Page 152: ...5 dBm 4 dBm 3 dBm 2 dBm 1 dBm 0 dBm 1 dBm 2 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm ________...

Page 153: ...m 1 5 dBm 0 5 dBm 0 5 dBm 1 5 dBm 2 5 dBm 3 5 dBm 4 5 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm...

Page 154: ...dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm 6 dBm 5 dBm 4 dBm 3 dBm 2 dBm 1 dBm 0 dBm 1 dBm 2 dBm 3 dBm 4 dBm 5 dBm 6 dBm _________dBm _________dBm _...

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Page 184: ...ESSAGES 6 3 Self Test Error Messages 6 3 Normal Operation Error and Warning Status Messages 6 8 6 3 TROUBLESHOOTING 6 10 6 4 ROUTINE MAINTENANCE 6 13 Replacing the Line Fuse 6 13 Cleaning the Fan Filt...

Page 185: ...re includes internal diagnostics that self test the instrument These self test diagnos tics perform a brief go no go test of most of the in strument PCBs and other internal assemblies You can perform...

Page 186: ...en Cold Indicates the 100 MHz crystal oven or the Option 16 high stability 10 MHz crystal oscillator has not reached operating temperature The 681XXB is still operable but frequency accuracy and stabi...

Page 187: ...nalog 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 Op...

Page 188: ...ncy range Use caution and always determine the output power level when operating the 681XXB in this condition Error 132 5 5 8 4 GH Switched Filter Indicates a failure in the 5 5 8 4 GHz switched filte...

Page 189: ...RF output in the 20 25 GHz frequency range Error 142 Sample and Hold Circuit Failed Indicates a failure of the sample and hold circuitry on the A10 PCB The 681XXB still operates normally but the RF o...

Page 190: ...reduced Normally caused by an internal component failure Run self test to verify malfunction RANGE Displayed in the frequency parameters area when 1 the analog sweep start frequency entered is greater...

Page 191: ...sually 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 ope...

Page 192: ...e power source then check the line fuse on the rear panel If the fuse is defective replace see page 6 13 If the fuse is good go to the next step Step 2 Check to see if power is available at the power...

Page 193: ...operating clean the air filter see page 6 14 If the fan is not operating call a service technician LOCK ERROR is Displayed Trouble Description This message is displayed in the frequency pa rameters ar...

Page 194: ...e F value entered re sults in a sweep outside the range of the instrument 3 the step size value entered is greater than the sweep range or 4 the number of steps entered results in a step size of less...

Page 195: ...by pulling out on the four panel fas teners holding them in place Figure 6 1 Step 2 Vacuum the honeycomb filter to clean it Step 3 Install the filter guard back on the rear panel Step 4 Press in on th...

Page 196: ...holder Step 3 Replace the fuse in 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 Step 5 Reconne...

Page 197: ...Fuse Fuse Holder Figure 6 2 Replacing the Line Fuse OPERATOR ROUTINE MAINTENANCE MAINTENANCE 681XXB OM 6 15 6 16 Changed November 1995...

Page 198: ...7 7 Master Slave Operation in VNA Mode 7 7 Terminating Master Slave Operation 7 9 7 3 USE WITH A 562 SCALAR NETWORK ANALYZER 7 10 Connecting the 681XXB to the 562 7 10 7 4 USE WITH A 360B VECTOR NETWO...

Page 199: ...ons for interconnecting and operating any two 68XXXBs in a master slave configuration Instructions for connecting the 681XXB to a WILTRON Model 562 Scalar Network Analyzer so that it can be used as a...

Page 200: ...ter and Slave 68XXXBs Step 3 Connect one end of a coaxial cable to the rear panel 10 MHz REF OUT connector on the Master 68XXXB Connect the other end to the rear panel 10 MHz REF IN con nector on the...

Page 201: ...er Slave Menu display below This menu lets you perform the following Go to the Slave Frequencies List menu Set the dF frequency for the Slave unit Set the Slave unit s main power level L1 Set the alte...

Page 202: ...ess 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 Slave unit Press Slave DF to open the dF fr...

Page 203: ...whenever the F1 F2 sweep range is selected on the Master 68XXXB The Master 68XXXB will sweep from F1 F2 with the values of F1 and F2 defined in the Master unit s frequency list Master Slave Operation...

Page 204: ...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...

Page 205: ...front panel control On the Master 68XXXB select CW mode At the CW Menu press Master Slave to go to the Master Slave Menu display At the Master Slave Menu display press Enable This terminates master s...

Page 206: ...ing proce dures Using the Auxiliary I O Cable Connect the 681XXB to the 562 SNA as shown in Figure 7 2 Step 1 Connect one end of the Auxiliary I O ca ble P N 806 7 to the 562 rear panel AUX I O connec...

Page 207: ...KER OUT connec tor Connect the other end of the cable to the 562 rear panel VIDEO MARKER IN PUT connector Step 4 Connect one end of a coaxial cable to the 681XXB rear panel DWELL IN connector Connect...

Page 208: ...Step 1 Connect one end of a coaxial cable to the 681XXB rear panel FM IN connector Con nect the other end to the 360B rear panel EXT FM LOCK OUTPUT connector Step 2 Connect one end of a coaxial cable...

Page 209: ...iguration and operation of the 681XXB for both modes of operation are described in the following paragraphs Source Lock Mode When operating in source lock mode the 360B phase locks the frequency outpu...

Page 210: ...operation Refer to the 360B VNA opera tion manual Once configured the 360B takes con trol of the sweep generator When the 360B takes control the display of all pa rameters on the 681XXB is disabled a...

Page 211: ...ncy and phase sig nal so as to phase lock itself to the reference signal from the 681XXB Due to the inherent resolution of the 360B s frequency readout frequency resolution is limited to 1 kHz interva...

Page 212: ...igure it for tracking mode of operation Refer to the 360B VNA operation man ual Once configured the 360B should take control of the sweep generator When the 360B takes control the display of all pa ra...

Page 213: ...es 681XXB Synthesized Sweep Generator A 2 REAR PANEL CONNECTORS Figure A 1 provides a illustration of the rear panel and describes the rear panel connectors A 3 CONNECTOR PINOUT DIAGRAMS Figures A 2 a...

Page 214: ...each frequency step in step sweep mode Also when video markers are selected provides 5V marker pulses and a 10V se lected marker pulse during forward sweep BNC connector HORIZ OUT Provides a 0V to 10...

Page 215: ...IEEE 488 bus GPIB A pinout diagram for this con nector is shown in Figure A 3 SERIAL I O Provides access to two RS 232 terminal ports to support service and calibra tion functions and master slave op...

Page 216: ...ANKING Retrace Blanking Output Provides a 5V or 5V signal coincident with sweep retrace Signal polarity selected from a front panel menu 7 L ALT SWP L Alternate Sweep Output Provides a TTL low level s...

Page 217: ...low level signal to stop the sweep in both analog and step sweep modes The sweep resumes when the signal is removed 19 AUX 2 Aux 2 Auxiliary input output to the processor PC3 20 BANDSWITCH BLANK Band...

Page 218: ...s have accepted the current data byte for internal processing 9 IFC Interface Clear A low true state places all bus instruments in a known quiescent state unaddressed to talk unaddressed to listen and...

Page 219: ...0 1 Hz with Option 11 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 instrum...

Page 220: ...d Step Sweep modes at the lesser of 10 dBm output or maximum specified leveled output power unless otherwise noted SPURIOUS SIGNALS Harmonic and Harmonic Related 681X5B Models 500 MHz to 2 2 GHz 50 dB...

Page 221: ...26 5 13 0 9 0 6 0 11 0 7 0 3 5 68163B 2 0 to 20 0 20 0 to 40 0 9 0 6 0 7 0 3 0 68165B 0 5 to 2 2 2 2 to 20 0 20 0 to 40 0 13 0 9 0 6 0 11 0 7 0 3 0 68169B 0 01 to 2 0 2 0 to 20 0 20 0 to 40 0 13 0 9...

Page 222: ...y 0 25 dB 2 0 dB 1 0 dB 1 0 dB 1 5 dB 1 5 dB 1 5 dB 25 60 dB 2 0 dB 1 0 dB 1 0 dB 1 5 dB 3 5 dB N A 60 dB 2 0 dB 1 0 dB 1 0 dB 2 5 dB 3 5 dB N A Flatness 0 25 dB 2 0 dB 0 8 dB 0 8 dB 1 1 dB 1 1 dB 1 1...

Page 223: ...r controlled 0 01 dB 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 approximat...

Page 224: ...ument is turned on control settings come on at the same functions and values existing when the instru ment was turned off Memory Sequencing Input Accepts a TTL low level sig nal to sequence through ni...

Page 225: ...output signal Front or rear panel input 50 or 600 imped ance both selectable from front panel modulation menu IN Accepts an external TTL compatible signal to pulse modulate the RF output signal Front...

Page 226: ...NS 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...