Wiltron 681 B Series Operation Manual Download Page 128

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Step 3

Set up the 681XXB as follows for an ana-
log sweep power level flatness test:

a. Reset the instrument by pressing

SYSTEM

, then

Reset

. The CW

Menu is displayed.

b. Press

Analog

to place the 681XXB in

the analog sweep frequency mode and
display the Analog Sweep Menu.

c. With the Analog Sweep menu dis-

played, press the main menu key

FREQUENCY

CONTROL

The Sweep Frequency Control menu,
shown 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 to the power level noted on the

test record.

g. Now, return to the Analog Sweep menu

by pressing the main menu key

CW/SWEEP

SELECT

OPERATION

POWER LEVEL ACCURACY

VERIFICATION

AND FLATNESS TESTS

681XXB OM

5-15

Summary of Contents for 681 B Series

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

Page 7: ...Figure 1 1 Series 681XXB Synthesized Sweep Generator...

Page 8: ...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 9: ...dBm 3 dBm 68169B 0 01 2 0 GHz 2 0 20 0 GHz 20 0 40 0 GHz 13 dBm 9 dBm 6 dBm 11 dBm 7 dBm 3 dBm With Option 15 High Power Installed 68137B 2 0 20 0 GHz 17 dBm 15 dBm 68147B 0 01 2 0 GHz 2 0 20 0 GHz 1...

Page 10: ...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 11: ...onnector on the front panel Option 11 0 1 Hz Frequency Resolution Provides frequency resolution of 0 1 Hz Option 14 WILTRON 360B VNA Compatibility Modifies rack mounting hardware to mate unit in a WIL...

Page 12: ...GHz Input Z 50 Resolution 1 Hz Other External Time Base Input EIP Microwave Inc Model 578A with External Mixer Option 91 26 5 to 40 GHz Power Meter with Power Sensor Range 30 to 20 dBm 1 W to 100 mW...

Page 13: ...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 14: ...ntainer or cushioning material is damaged retain until the contents of the ship ment have been checked against the packing list and the sweep gener ator has been checked for mechanical and electrical...

Page 15: ...0 Vac the 681XXB accepts 180 to 264 Vac line voltage If the selector setting is incor rect for the line voltage available change it to the correct setting Whenever the selector setting is changed the...

Page 16: ...ng temperature 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 FO...

Page 17: ...o assure stable opera tion Operating Environment The 681XXB can be operated within the following en vironmental limits Temperature 0 C to 55 C 32 F to 131 F Humidity 5 to 95 relative at 40 C Altitude...

Page 18: ...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 19: ...is displayed 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...

Page 20: ...rators 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 commands t...

Page 21: ...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 22: ...Zone de Courtaboeuf 91951 Les Ulis Cedex Telephone 016 44 66 546 FAX 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 MEER...

Page 23: ...8 3 4 DATA ENTRY AREA 3 10 3 5 INSTRUMENT START UP 3 12 Powering Up the 681XXB 3 12 Start Up Display 3 12 Standby Operation 3 12 Self Testing the 681XXB 3 13 Resetting to Default Parameters 3 13 3 6 E...

Page 24: ...39 3 10 POWER LEVEL SWEEP OPERATION 3 40 Selecting CW Power Sweep Mode 3 40 Setting CW Power Sweep Step Size and Dwell Time 3 41 Selecting a CW Power Sweep Trigger 3 42 Selecting a Power Level Sweep R...

Page 25: ...l 3 68 Configuring the Rear Panel 3 69 Configuring the RF 3 70 Configuring the GPIB 3 71 Setting Increment Sizes 3 73 3 14 SAVING RECALLING INSTRUMENT SETUPS 3 74 Saving Setups 3 74 Recalling Setups 3...

Page 26: ...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 27: ...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 28: ...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 29: ...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 30: ...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 31: ...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 32: ...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 33: ...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 34: ...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 35: ...ayed until the sweep generator 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 gen...

Page 36: ...on To perform a self test from any menu press SYSTEM Then when the System Menu shown below is displayed press Selftest Resetting to Default Pa rameters You can reset the 681XXB to the factory selected...

Page 37: ...40 0 2 0 5 0 8 0 11 0 14 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 681XXB MODEL NUMBER POWER LEVEL PARAMETERS dBm L0 L1 L2 L3 L4 L5 L6 L7 L8 L9 68137B 1 0 0 0 1 0 2 0 3 0 4 0 5 0 6...

Page 38: ...parameters 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 valu...

Page 39: ...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 40: ...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 41: ...the 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 s...

Page 42: ...s you 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...

Page 43: ...d 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 ent...

Page 44: ...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...

Page 45: ...r s output frequency is swept between selected start and stop frequencies When the sweep width is 100 MHz the sweep is phase lock corrected at both the start and stop frequencies and at each band swit...

Page 46: ...rameter 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 c...

Page 47: ...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 shown be low from the Analog Sweep R...

Page 48: ...from a step 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 shown below is then display...

Page 49: ...Press 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...

Page 50: ...ps 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 menu d...

Page 51: ...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 52: ...mined 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 preset...

Page 53: ...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 54: ...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 sweep...

Page 55: ...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 56: ...ode 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 shown be low To go to the Alternate Sweep menu...

Page 57: ...the alternate sweep is now active Now press Previous Menu to return to the Step Sweep Menu display or the Analog Sweep Menu display if operating in analog sweep frequency mode Notice the changes to th...

Page 58: ...Sweep menu press Alt Level Select the power level for the alternate sweep range L0 L1 L2 L3 or L4 The menu then displays the current level parameter for the selected power level If you wish to change...

Page 59: ...s the main menu key LEVEL ALC SELECT At the resulting menu display press Level The Level Menu shown below is displayed This menu lets you perform the following Edit the power level parameter Edit the...

Page 60: ...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 shown be low press Level List This...

Page 61: ...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 62: ...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 63: ...single 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...

Page 64: ...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 tary data kn...

Page 65: ...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 shown below from the CW Level Sweep Ramp menu press Trigger Me...

Page 66: ...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 67: ...rs 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 L9 L0 that you wish to set The men...

Page 68: ...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 69: ...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 70: ...ith frequency 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 4 9...

Page 71: ...nu To go to the Leveling Menu from the ALC Mode menu press Leveling Menu The Leveling Menu shown below is displayed To select internal ALC press Internal Pressing one of the other leveling menu soft k...

Page 72: ...t 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 and selected the senso...

Page 73: ...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 74: ...shown 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 th...

Page 75: ...th 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 Loop M...

Page 76: ...or ed iting Edit the current slope value using the cursor 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 p...

Page 77: ...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 78: ...n 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 selecte...

Page 79: ...wer 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 ret...

Page 80: ...er 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 cu...

Page 81: ...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 82: ...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 83: ...de of the RF output changes linearly as the exter nal AM input changes In Log AM mode sensitivity is 10 dB V and the sweep generator accepts a wider range of input sig nals from the external signal ge...

Page 84: ...connector Press On 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 operating mode The AM status displa...

Page 85: ...e allows maximum deviations of 50 MHz In Wide mode the FM signal is synthesized by ap plying the modulating signal to the main tuning coil of the YIG tuned oscillator Wide FM mode allows maximum devia...

Page 86: ...elect the front or rear panel FM IN connector The FM status display will reflect you selection Press 600 50 to select the input impedance of the input connector The FM status display will re flect you...

Page 87: ...g 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 resultin...

Page 88: ...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 89: ...then when you press More the menu shown 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...

Page 90: ...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 Configuration...

Page 91: ...om the System Configuration menu press Front Panel The Configure Front Panel Menu shown below is displayed Press Brite repeatedly to increase the intensity of the data display to the desired level Pre...

Page 92: ...lanking 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 intern...

Page 93: ...F to select RF On or Off during re trace The display will reflect 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...

Page 94: ...lt 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...

Page 95: ...tion 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...

Page 96: ...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 pa rameter Open the paramet...

Page 97: ...number 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...

Page 98: ...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 99: ...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 100: ...Table of Contents 4 1 INTRODUCTION 4 3 4 2 MENU MAP DESCRIPTION 4 3 Chapter 4 Local Operation Menu Maps...

Page 101: ...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 102: ...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 103: ...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 104: ...Sweep Time On Off On Off 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 Off On...

Page 105: ...n Off On Off On Off Edit Step Size Edit Number of Steps Edit Start Frequency Edit End Frequency Edit Current Power Level Tag Untag Highlighted Marker Frequency Edit Highlighted Marker Frequency N A On...

Page 106: ...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 107: ...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 108: ...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 109: ...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 110: ...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 Set The Exter...

Page 111: ...ROL SYSTEM MODULATION CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL Log AM 10dB V or Linear AM 100 V Front Panel Input or Rear Panel Input 600 or 50 Input Impedance AM On Off Displa...

Page 112: ...DULATION CW SWEEP SELECT FREQUENCY CONTROL LEVEL ALC SELECT LEVEL CONTROL FM On Off Wide FM Mode or Narrow FM Mode 600 or 50 Input Impedance Select Sensitivity Display Showing FM Selected On Unlocked...

Page 113: ...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 114: ...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 Frequency Switching In CW and...

Page 115: ...CKOUT 5 4 Power 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 TESTS 5 11 Test Setup 5 11 Power Leve...

Page 116: ...ocopied and used to record the results of operational verification testing of your 681XXB These tables are included as part of the operational verifica tion test procedures and contain test informatio...

Page 117: ...e 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 complete the sweep generator displays...

Page 118: ...t If the Fre quency Counter has an INT EXT toggle 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...

Page 119: ...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 120: ...____ 2 000 002 000 _____________________ 2 000 003 000 _____________________ 2 000 001 000 _____________________ 2 000 004 000 _____________________ 2 000 002 000 _____________________ 2 000 005 000 _...

Page 121: ...00 000 000 _____________________ 38 000 000 000 _____________________ 40 000 000 000 _____________________ 2 000 001 000 _____________________ 2 000 002 000 _____________________ 2 000 003 000 _______...

Page 122: ...____________ 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 123: ...32 000 000 000 0 _____________________ 35 000 000 000 0 _____________________ 38 000 000 000 0 _____________________ 40 000 000 000 0 _____________________ 2 000 000 100 0 _____________________ 2 000...

Page 124: ...ws Step 1 Calibrate the Power Meter with the Power Sensor Step 2 Connect the Power Sensor to the RF OUT PUT of the 681XXB Step 3 Connect the 681XXB rear panel HORIZ OUT to the Oscilloscope CH 1 input...

Page 125: ...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 126: ...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 c With the Step Sweep menu displayed press the main menu key FREQUENCY C...

Page 127: ...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 Power M...

Page 128: ...the Analog Sweep menu dis played press the main menu key FREQUENCY CONTROL The Sweep Frequency Control menu shown below is displayed d Press Full to select a full range fre quency sweep e Press Edit...

Page 129: ...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 130: ...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 131: ..._________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm Specification is 1 0 dB Power Level Flatness Step Sweep Set Power Max...

Page 132: ...______dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm Specification is 1 0 dB Power Level Flatness St...

Page 133: ...____dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm Specification is 1 0 dB Power Level Flatness Step...

Page 134: ...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 135: ..._________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 136: ...___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 137: ..._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 138: ...dBm 3 dBm 4 dBm 5 dBm 6 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm Spe...

Page 139: ...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 140: ...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 141: ...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 142: ...Bm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm 6 dBm 5 dBm 4 dBm 3 dBm 2 dBm 1 dBm 0 dBm...

Page 143: ...________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm 3 5 dBm 2 5 dBm 1 5 dBm 0 5 dBm 0 5 dBm 1 5 dBm 2 5 dBm 3...

Page 144: ...dBm 1 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm 10 dBm 9 dBm 8 dBm 7...

Page 145: ...__dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm 7 5 dBm 6 5 dBm 5 5 dBm 4 5 dBm 3 5 dB...

Page 146: ..._________dBm 6 dBm 5 dBm 4 dBm 3 dBm 2dBm 1 dBm 0 dBm 1 dBm 2 dBm 3 dBm 4 dBm 5 dBm 6 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _____...

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

Page 148: ...1 dBm 0 dBm 1 dBm 2 dBm 3 dBm 4 dBm 5 dBm 6 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm ________...

Page 149: ...__dBm _________dBm _________dBm 3 dBm 2 dBm 1 dBm 0 dBm 1 dBm 2 dBm 3 dBm 4 dBm 5 dBm 6 dBm 7 dBm 8 dBm 9 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm...

Page 150: ...dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm 6dBm 5 dBm 4 dBm 3 dBm 2dBm 1 dBm 0 dBm...

Page 151: ..._________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm 3 dBm 2 dBm 1 dBm 0 dBm 1 dBm 2 dBm 3 dBm 4...

Page 152: ...2 dBm 1 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm 6 dBm 5 dBm 4 dBm 3...

Page 153: ...Bm 1 dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm _________dBm 3 dBm 2 dBm 1 dBm 0 dB...

Page 154: ...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 155: ...ostics 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 a sweep generator self tes...

Page 156: ...perating temperature The 681XXB 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 lo...

Page 157: ...e will not appear when the RF output goes unleveled Error 122 Level Reference Failed Indicates a failure of the level reference circuitry on the A10 PCB Use caution and always determine the output pow...

Page 158: ...uency range Use caution and always determine the output power level when operating the 681XXB in this condition Error 134 13 25 20 GH Switched Filter Indicates a failure in the 13 25 20 GHz switched f...

Page 159: ...e DAC on the A10 PCB The 681XXB still operates normally but RF output level flatness may be affected during analog frequency sweeps Error 144 RF was Off when Selftest started Some tests were not perfo...

Page 160: ...eatly 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 g...

Page 161: ...the power level usually clears the warning UNLOCKED When FM is selected ON this warning message appears indicating that the instrument is not phase locked during the FM mode of operation EXT REF This...

Page 162: ...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 163: ...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 164: ...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 165: ...hese line fuse values are printed on the rear panel next to the fuse holder Step 1 Disconnect the 681XXB from the power source Step 2 Using a small flat blade screwdriver turn the fuse cap counter clo...

Page 166: ...ep 2 Vacuum the honeycomb filter to clean it Step 3 Install the filter guard back on the rear panel Step 4 Press in on the panel fasteners to secure the filter guard to the rear panel Cleaning the Dat...

Page 167: ...ter Slave Operation 7 7 Master Slave Operation in VNA Mode 7 7 Terminating Master Slave Operation 7 9 7 3 USE WITH A 562 SNA 7 10 Connecting the 681XXB to the 562 7 10 7 4 USE WITH A 360B VNA 7 12 Con...

Page 168: ...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 169: ...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 170: ...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 171: ...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 172: ...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 173: ...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 174: ...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 175: ...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 176: ...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 177: ...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 178: ...ration 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 output o...

Page 179: ...ck 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...

Page 180: ...cy 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 interval...

Page 181: ...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 182: ...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 183: ...ch 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 10V r...

Page 184: ...m an external controller via the 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 ti...

Page 185: ...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 186: ...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 Bandswitch Blanking Output Provides a 5V or 5V s...

Page 187: ...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 188: ...s to 99 seconds PHASE LOCKED STEP SWEEP MODE Sweep Width Independently selected 1 kHz 0 1 Hz with Option 11 to full range Every frequency step in sweep range is phase locked Accuracy Same as internal...

Page 189: ...s 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 p...

Page 190: ...dBm 2 to 20 GHz 3 5 dBm 20 to 26 5 GHz 68159B 13 dBm 2 GHz 9 dBm 2 to 20 GHz 6 dBm 20 to 26 5 GHz 11 dBm 2 GHz 7 dBm 2 to 20 GHz 3 5 dBm 20 to 26 5 GHz 68163B 9 dBm 2 to 20 GHz 6 dBm 20 to 40 GHz 7 d...

Page 191: ...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 remot...

Page 192: ...Wave Symmetry 50 5 at all power levels External Input Front or rear panel BNC selectable from modulation menu Drive Level TTL compatible input Minimum Pulse Width 5 s Input Logic Positive true or nega...

Page 193: ...s all instrument parameters to predefined de fault states or values Any pending GPIB I O is aborted Selectable from the system menu Master Slave Operation Allows two 681XXB output sig nals to be swept...

Page 194: ...V signal co incident with sweep retrace Signal polarity selectable from system menu SEQ SYNC OUT Sequential Sync Output Provides a 5V signal during retrace at bandswitching points and dur ing each fre...

Page 195: ...the RF output connector on the front panel Option 11 0 1 Hz Frequency Resolution Provides fre quency resolution of 0 1 Hz Option 14 WILTRON 360B VNA Compatibility Modifies rack mounting hardware to ma...

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Summary of Contents for 681 B Series

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Wiltron 681 B Series, Operation Manual, Page: 128 / 195

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Summary of Contents for 681 B Series

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