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Anritsu 37 D Series, Maintenance Manual

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Table of Contents

3-1

INTRODUCTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3-3

3-2

SYSTEM OVERVIEW · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 3-3

3-3

ANALOG SUBSYSTEM ASSEMBLIES · · · · · · · · · · · · · · · · · · · · · · · 3-10

Signal Source Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Test Set Module, 20 GHz and 40 GHz Instruments . . . . . . . . . . . . . . 3-11
Test Set Module, 50 GHz and 65 GHz Instruments . . . . . . . . . . . . . . 3-13
A7 PCB 10 MHz Timebase . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Receiver Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16
A8, Source Lock/Signal Separation and Control PCB . . . . . . . . . . . . . 3-18
IF Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
A7 PCB, LO3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19
A5 A/D Converter PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

3-4

DIGITAL SUBSYSTEM ASSEMBLIES · · · · · · · · · · · · · · · · · · · · · · · 3-20

A9 Main Processor PCB Assembly . . . . . . . . . . . . . . . . . . . . . . . 3-20
A13 I/O Interface #1 PCB Assembly. . . . . . . . . . . . . . . . . . . . . . . 3-21
A14 I/O Interface #2 PCB Assembly. . . . . . . . . . . . . . . . . . . . . . . 3-21
A15 Graphics Processor PCB Assembly . . . . . . . . . . . . . . . . . . . . . 3-22
A16 Hard Disk PCB Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
Floppy Disk Drive Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22
A24 VME Bus Terminator PCB . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

3-5

MAIN CHASSIS ASSEMBLIES · · · · · · · · · · · · · · · · · · · · · · · · · · · 3-22

A17 System Motherboard Assembly. . . . . . . . . . . . . . . . . . . . . . . 3-22
Front Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
A18 Rear Panel Interface PCB. . . . . . . . . . . . . . . . . . . . . . . . . . 3-23
Power Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

Chapter 3
Theory of Operation

Summary of Contents for 37 D Series

Page 1: ...P N 10410 00264 REVISION C PRINTED JULY 2007 COPYRIGHT 2007 ANRITSU CO SERIES 37XXXD VECTOR NETWORK ANALYZER MAINTENANCE MANUAL 490 JARVIS DRIVE l MORGAN HILL CA 95037 2809...

Page 2: ...plied and the remedies provided herein are the Buyer s sole and exclusive remedies TRADEMARK ACKNOWLEDGEMENTS V Connector and K Connector are registered trademarks of Anritsu Company MS DOS is a regis...

Page 3: ......

Page 4: ......

Page 5: ...4 Operational Performance Tests This chapter contains procedures that provide a means of fully testing the 37XXXD VNA system for proper operation and signal stability These tests are intended to be u...

Page 6: ...bles and other associated RF microwave components Appendix C Lightning 37000D Technical Data Sheet This appendix contains a copy of the 37000D Series Vector Network Analyzers Technical Data Sheet Anri...

Page 7: ...Service Log 1 6 System Test Certification 1 7 Servicing Specially Modified Instruments 1 7 1 9 SERVICE SUPPORT 1 7 Technical Support 1 7 Service Software 1 8 Verification Kits 1 9 Failed Assembly Exc...

Page 8: ...Assembly 3 21 A14 I O Interface 2 PCB Assembly 3 21 A15 Graphics Processor PCB Assembly 3 22 A16 Hard Disk PCB Assembly 3 22 Floppy Disk Drive Assembly 3 22 A24 VME Bus Terminator PCB 3 22 3 5 MAIN CH...

Page 9: ...ICATION PROCEDURE 5 6 5 5 VNA TRACEABILITY 5 7 Chapter 6 Adjustments 6 1 INTRODUCTION 6 3 6 2 LO1 CALIBRATION 6 3 6 3 LO2 CALIBRATION 6 5 6 4 FREQUENCY CALIBRATION 6 7 6 5 RF POWER ALC CALIBRATION 6 1...

Page 10: ...REQUIRED 8 3 8 3 COVERS 8 4 8 4 A1 TO A16 PCBS 8 6 A1 to A16 PCBs 8 6 8 5 A24 VME BUS TERMINATOR PCB 8 8 8 6 FRONT PANEL ASSEMBLY 8 9 8 7 LIQUID CRYSTAL DISPLAY LCD 8 12 8 8 FLOPPY DISK DRIVE 8 12 8 9...

Page 11: ...R MAINTENANCE A 5 Appendix B Lightning 37000D Technical Data Sheet Appendix C ME7808B C Technical Data Sheet Appendix D ME7808B C Broadband Measurement System Maintenance D 1 INTRODUCTION D 3 D 2 MG36...

Page 12: ......

Page 13: ...dware Adjustments and Calibrations 1 6 Internal Service Log 1 6 System Test Certification 1 7 Servicing Specially Modified Instruments 1 7 1 9 SERVICE SUPPORT 1 7 Technical Support 1 7 Field Service K...

Page 14: ...1 2 37XXXD MM Figure 1 1 Series 37XXXD Vector Network Analyzer System...

Page 15: ...tem serial numbers frequency ranges and related manuals It also in cludes service strategy available service facilities and static sensitive component handling precautions and a list of recommended te...

Page 16: ...nd Per formance Verification procedures for all models The 37XXXD Series Vector Network Analyzer Programming Manual 10410 00262 describes all 37XXXD GPIB commands and provides programming information...

Page 17: ...in all models of the 37XXXD family Examples of this are Options 3 10 10A and 12 1 8 SERVICE STRATEGY This section provides an overview of the VNA service strategy and available service facilities It a...

Page 18: ...s itself for proper operation Should a failure occur it notifies the user via a failure message on the display screen In remote only operation it also sets the GPIB Status Byte if enabled It also writ...

Page 19: ...ments Instruments with customer requested special modifications performed by Anritsu will have an identifying Specials Modification number printed on the rear panel This number will be preceded with t...

Page 20: ...ns and measurements See the Operational Per formance Tests chapter for details Anritsu 37XXX Performance Verification Software 2300 480 or 2300 496 This software is used to verify the VNA s published...

Page 21: ...recision K Connector components that are traceable to the NIST V Verification Kit Models 3669B and Model SC7406 Contains precision V Connector components that are traceable to the NIST Model 3669B is...

Page 22: ...ed service centers throughout the world Ta ble 2 1 located on page 2 2 lists all Anritsu services centers 1 12 STATIC SENSITIVE COMPONENT HANDLING PROCEDURES The VNA contains components that can be da...

Page 23: ...ents 5 Label all static sensitive devices 6 Keep component leads shorted to gether whenever possible 7 Handle PCBs only by their edges Do not handle by the edge connec tors 8 Lift handle solid state d...

Page 24: ...ith V connector Test Ports Anritsu 3670A50 2 3671A50 2 Anritsu 3670K50 2 3671K50 2 Anritsu 3670V50 2 O P Calibration Kit For instruments with Option 7A For instruments with Option 7N or 7NF For instru...

Page 25: ...inter face or Anritsu MF2413B A O O Digital Multimeter None Any T Oscilloscope None Tektronix Inc Model 2445 T Power Meter 1 with Power Range 30 to 20 dBm 1 mW to 100 mW Other GPIB controllable Anrits...

Page 26: ......

Page 27: ...Table of Contents 2 1 INTRODUCTION 2 3 2 2 EXCHANGE ASSEMBLY PROGRAM 2 3 2 3 REPLACEABLE SUBASSEMBLIES AND PARTS 2 4 2 4 PARTS ORDERING INFORMATION 2 4 Chapter 2 Replaceable Parts...

Page 28: ...stralia Telephone 03 9558 8177 FAX 03 9558 8255 ISRAEL Tech Cent Ltd 4 Raul Valenberg St Tel Aviv 69719 Telephone 03 64 78 563 FAX 03 64 78 334 SWEDEN Anritsu AB Borgafjordsgatan 13 164 40 Kista Swede...

Page 29: ...emblies or RF assemblies are warranted for 90 days from the date of shipment or for the balance of the original equipment war ranty whichever is longer NOTE When sending a failed assembly to the facto...

Page 30: ...PARTS ORDERING INFORMATION All parts listed in Tables 2 2 through 2 4 may be ordered from your lo cal Anritsu service center Table 2 1 page 2 2 Or they may be or dered directly from the factory at the...

Page 31: ...D38505 4 A7 10 MHz LO3 61181 3 ND62436 A8 Source Lock Separation Control 60866 3 ND60702 A9 Main Processor 62414 ND63005 A13 Floppy Drive Control I O 1 D38513 4 D38513 4 A14 I O 2 D38514 3 D38514 3 A...

Page 32: ...40 GHz models 48383 48483 Bias Tee 50 and 65 GHz models 53409 53409 Sampler Down Conversion Module all models 58437 ND61660 Power Amplifier all models 56650 ND61660 SPDT Switch 50 and 65 GHz models 29...

Page 33: ...PCB for LCD 2000 1365 Basic Measurement Software BMS 2 disk set 2300 500 Backup battery for A9 PCB Purchase Locally Boot Firmware for A9 PCB 58 1321 Cable front panel for Opt 15 20 and 40 GHz models B...

Page 34: ...37XXXD MM Front Panel Assembly Includes Front Panel PCB Signal Source Module Printed Circuit Board Assemblies A1 to A9 Fan Assembly Printed Circuit Board Assemblies A13 to A16 Power Supply Module Figu...

Page 35: ...REPLACEABLE PARTS PARTS ORDERING INFORMATION 37XXXD MM 2 9 2 10 Figure 2 2 Signal Source Parts Location Diagram...

Page 36: ......

Page 37: ...IF Section 3 18 A7 PCB LO3 3 19 A5 A D Converter PCB 3 19 3 4 DIGITAL SUBSYSTEM ASSEMBLIES 3 20 A9 Main Processor PCB Assembly 3 20 A13 I O Interface 1 PCB Assembly 3 21 A14 I O Interface 2 PCB Assem...

Page 38: ......

Page 39: ...own converted and then transformed into their real and imaginary vector components The resultant vector compo nents are measured and converted into digital information This digi tal information is sen...

Page 40: ...stores a record of system failures data about the failures and other key system service information The service log is implemented using internal battery backed SRAM memory SYSTEM OVERVIEW THEORY OF...

Page 41: ...BLER YIG OSC 2 20 GHz P P P 68030 S S S S TB RB RA TA HARM GEN L O 1 L O 2 L O 3 REF OSC 10 MHz I O CONTROL LOGIC QUIET BUS INTERFACE CONTROL A D BUS INTERFACE CONTROL EXTERNAL KEYBOARD INTERFACE I O...

Page 42: ...diagnostics displays Test A b1 Test B b2 J2 J7 Control Lines from A8 PCB Control Lines to Transfer Switch and Buffer Amp 40 MHz to 20 GHz 40 MHz to 40 GHz Control Control Control ALC Control J1 6 3 t...

Page 43: ...Ref A 3 Ref B 3 Ref A Ref B J3 J1 J4 J2 J1 Tuning Currents and Control Notes 1 Not present on 20 GHz models 3 Ref A a1 Ref B a2 J5 J3 Control from A8 PCB 10 MHz 10 MHz Control from A8 PCB Control Lin...

Page 44: ...2 J2 J2 J1 J4 J2 J3 J2 ALC from A21A2 PCB J1 J3 J2 40 MHz to 2 GHz 6 3 to 8 3 GHz 40 MHz to 19 GHz 9 5 to 16 25 GHz 40 MHz to 38 GHz J3 Port 2 Coupler DUT Port 1 Coupler Port 1 Bias Tee 2 J4 J4 J5 J2...

Page 45: ...f A 40 MHz to 38 GHz Ref B 40 MHz to 38 GHz Shaped Pad 40 MHz to 65 GHz Ref A 40 MHz to 65 GHz Ref B ALC Control PCB 49808 3 Ref A J7 J8 Ref B 2 5 MHz CW 2 5 MHz CW J4 J2 J1 J1 J3 Ref B 38 to 65 GHz D...

Page 46: ...e fundamental frequency source signals from 2 0 to 20 GHz All other output frequencies are derived from the fundamental frequen cies generated by the YIG tuned oscillator The signal source output freq...

Page 47: ...cut off frequencies for these filters are 3 3 GHz 5 5 GHz 8 4 GHz and 13 5 GHz respectively The switched filter also amplifies the RF signal by 8 to 16 dB depending on frequency The signal is then pa...

Page 48: ...ef A b1 a1 q S21 Test B Ref A b2 a1 q S12 Test A Ref B b1 a2 q S22 Test B Ref B b2 a2 The full RF path of the Reference Signals is shown in Figure 3 3 Source Lock Signal Paths The full RF path of the...

Page 49: ...20 GHz and 40 GHz models with the following exceptions q Transfer Switch q SPDT Switch q Port 1 MUX Coupler q Port 2 MUX Coupler q Port 1 and Port 2 Source Quadrupler Modules q 37 GHz High Pass Filte...

Page 50: ...GHz lowpass filter of the Source Module is fed into a simple SPDT switch If the in strument is sweeping in the forward mode S21 or S11 RF is then switched into the Port 1 Ref A Source Quadrupler Modu...

Page 51: ...ocal Oscillator and an 80 kHz calibration signal The 80 kHz calibration signal is periodi cally sent to the A3 A4 and A6 PCBs for self calibration of IF ampli fier circuits This occurs during the time...

Page 52: ...357 to 536 5 MHz signal from the A1 First Local Oscillator LO1 PCB Regardless of the operating fre quency the Power Amplifier is biased on at all times to insure opti mum thermal stability The second...

Page 53: ...TERFACE 37XXX GPIB SYSTEM GPIB LOGIC DECODING GRAPHICS PROCESSOR INTERRUPT VECTOR DRAM VME INTERFACE VIDEO PALATTE VRAM VME TERMINATIONS BIAS TEE ANA OUT DIGITAL IN P O J19 MOTHERBOARD PCB A14 I O 2 P...

Page 54: ...tion consists of the items listed below refer to Figure 3 2 q A3 Test A IF PCB q A4 Reference IF PCB q A5 A D Converter PCB q A6 Test B IF PCB q A7 Third Local Oscillator LO3 PCB The IF Section conver...

Page 55: ...ls during the A D conver sion process Each channel is sequentially selected for input to the 20 bit A D converter The A5 A D Converter PCB also derives the 109 89 kHz Power Supply Synchronization Sign...

Page 56: ...operation it stores the 37XXXD software that is loaded from disk at power up q 8 KB BBRAM This auxiliary memory chip contains a back up battery that is continuously recharged whenever power is ap plie...

Page 57: ...9 PCB This bus is managed by the control circuits on the A14 PCB such that it is inactive during the the time that a mea surement is being taken NOTE The output data from the A5 PCB A D converter is s...

Page 58: ...ically mounted to the test set tray not to the Front Panel Assembly It interfaces with the system via the A13 I O Inter face 1 PCB A24 VME Bus Terminator PCB This PCB assembly terminates the VME bus t...

Page 59: ...ink these connectors and the rear panel fan assembly to the A17 Mother board PCB and other assemblies within the VNA q IEEE 488 2 GPIB connector with associated interface circuits q Dedicated GPIB con...

Page 60: ...s otherwise indi cated supply voltages are regulated on the assembly using them The analog and digital power supply grounds are isolated NOTE All power supply voltages listed in Table 3 1 can be acces...

Page 61: ...ications 4 6 Required Equipment 4 7 Additional Required Equipment 4 7 Installation and Launching the Test Program 4 7 Running the Tests 4 9 Description of Tests 4 9 4 5 LOG MAGNITUDE DYNAMIC ACCURACY...

Page 62: ......

Page 63: ...nerally be run in the sequence presented NOTE The procedures presented in Chapter 5 System Perfor mance Verification provide the means to test the accuracy of the measurements performed by the VNA Ple...

Page 64: ...urred during operation NOTES Errors 7201 to 7209 GPIB remote opera tion programming errors report that one or more external GPIB programming er rors has been detected These messages do not indicate a...

Page 65: ...he net pass fail result of the self test is shown on the display If the VNA is in remote only operation the results are re ported via the GPIB output buffer If the self test fails detailed error messa...

Page 66: ...ral test record records only Pass Fail Not Applicable or Not Performed for each test Other data files will record numerical data if you so choose All data files are readable and printable by a text re...

Page 67: ...ional Required Equipment q The Frequency Accuracy test requires an EIP brand frequency counter Most models are acceptable but GPIB Band 3 and Ex ternal 10 MHz reference input capabilities are required...

Page 68: ...ort type The program will create a file for Pass Fail information named 123456 SVC where 123456 is the serial number of the VNA If the program locates an existing SVC file of the same instrument in th...

Page 69: ...ob test starts the external keyboard test and guides the user through a floppy drive test It also prompts the user to check the pin depth of the Test Ports and to check the fuses in the bias tee circu...

Page 70: ...en the Test Ports A problem seen on only one channel could be caused by a damaged or incorrectly connected Option 15 front panel cable A problem seen on all four channels could be caused by an insuffi...

Page 71: ...e by testing with de fault and lowered source power If the test fails interior attenuators on the VNA RF deck may have been removed or be the incorrect values The sampler s may have degraded requiring...

Page 72: ...performed in this order 1 Source Frequency Cal 2 Port 1 ALC Cal 3 Port 2 ALC Cal 4 Source Lock Threshold Cal 12 Term Cal This is a standard OSL measurement calibration which is required to perform mo...

Page 73: ...u Service Centers The test program will use the ripple extrac tion technique to derive the corrected directivity of both Test Ports Numeric data may be saved If the test fails ensure that the pin dept...

Page 74: ...t will continue indefi nitely until stopped by the operator using the Escape key or Cancel button or when 20 errors have occurred If the test fails due to the extreme nature of this test a very inter...

Page 75: ...inty the VNA is measuring within factory specifica tion for that power level A test record with pre calculated uncertainties is shown in Table 4 1 This test record should be copied before use Required...

Page 76: ...he cal kit into the VNA and se lect Install Kit Information From Floppy Disk Step 5 Press the Begin Cal key and set up a CW calibration with the following parameters n Full 12 Term n Include Isolation...

Page 77: ...10 Install the 4622K step attenuator and press the Data Points key then enter 10 Points Drawn in CW Step 11 For an attenuator setting greater than 30 dB set averages to 4096 turn on averaging by press...

Page 78: ...tainty of that step Transfer the 8 characterization values to Column C The uncertainty values in Column D of Table 4 1 are derived values that are a composite of the uncertainty of the VNA and the unc...

Page 79: ...______ Date ________ Operator ____________________ Step Atten ID _____________________ A Attenuation Device Nominal Value B Measured Value Avg C Attenuation Device Characterized or Traceable Value D C...

Page 80: ......

Page 81: ...SUREMENT CONDITIONS 5 3 Standard Conditions 5 3 Special Precautions 5 4 5 3 MEASUREMENT ACCURACY 5 4 Verification Software 5 4 Verification Result Determination 5 5 5 4 VERIFICATION PROCEDURE 5 6 5 5...

Page 82: ......

Page 83: ...rrounding environmental conditions and the condition and sta bility of the test port connectors through cable and calibration kit de termine the system measurement integrity to a large extent These ar...

Page 84: ...mbers The Standard Conditions and Special Precautions described in Section 5 2 should be observed when performing these procedures The verification software performs the following functions q It guide...

Page 85: ...electrical impedance comparison measurements The quality of the verification results is very dependent on the degree of care taken by the user in maintaining calibrating and using the system The most...

Page 86: ...1 1 q GPIB cable Anritsu PN 2100 2 or equivalent q Anritsu Test Cable Model 3670K50 2 or 3670V50 2 or equivalent NOTE Use of non Anritsu calibration or verification kits is not sup ported Procedure S...

Page 87: ...ainty of a result of a measurement with the val ues and uncertainties of each of the intermediate reference standards to the highest reference standard of which traceability for the result of measurem...

Page 88: ...nents were characterized by their manufacturers or by a standards laboratory and they have excellent repeatability characteristics The horizontal path shows the conventional traceability chain for the...

Page 89: ...ble of Contents 6 1 INTRODUCTION 6 3 6 2 LO1 CALIBRATION 6 3 6 3 LO2 CALIBRATION 6 5 6 4 FREQUENCY CALIBRATION 6 7 6 5 RF POWER ALC CALIBRATION 6 10 6 6 SOURCE LOCK THRESHOLD 6 14 Chapter 6 Adjustment...

Page 90: ......

Page 91: ...ing a backup copy of the file and is not required 6 2 LO1 CALIBRATION This procedure uses the VNA internal diagnostics and calibration menus to adjust the A1 1st LO PCB assembly Perform this calibatio...

Page 92: ...tep 1 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu Step 2 Select DIAGNOSTICS from the menu then select in se quence H W CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK H...

Page 93: ...imit lines Calibration Procedure Perform the following steps Equipment Required None NOTE Allow the VNA to warm up for at least 30 minutes prior to performing this calibration Procedure Step 1 Press t...

Page 94: ...Step 1 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu Step 2 Select DIAGNOSTICS from menu then select in se quence H W CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW_...

Page 95: ...placed n A21A1 Source YIG Bias n A21A2 Source Controller n Down Converter n YIG Oscillator n Switched Filter q BBRAM chip on the A9 Processor PCB is replaced and the Source Calibration Data was not pr...

Page 96: ...STMENTS 6 8 37XXXD MM OPTIONS TRIGGERS REAR PANEL OUTPUT DIAGNOSTICS MULTIPLE SOURCE CONTROL PRESS ENTER TO SELECT DIAGNOSTICS START SELF TEST READ SERVICE LOG INSTALLED OPTIONS PERIPHERAL TESTS TROUB...

Page 97: ...NOSTICS from the menu then select in se quence H W CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW_CAL FRE If calibration fails q Verify that the GPIB cable is connected to the Dedicated GPIB bottom...

Page 98: ...e Tests fails q Other testing or troubleshooting reveals a possible problem with the RF Power accuracy or the ALC loop q Any of the following assemblies are replaced n A21A1 Source YIG Bias n A21A2 So...

Page 99: ...6230 for 50 and 65 GHz mod els q GPIB cable Anritsu 2100 2 or equivalent NOTE Allow the VNA and power meter to warm up for at least 30 minutes prior to performing this calibration Procedure Step 1 Pre...

Page 100: ...low the directions displayed on the VNA screen until the calibration is completed Step 5 When Port 1 has been calibrated connect the Power Sensor to Port 2 and Calibrate Port 2 RF POWER ALC CALIBRATIO...

Page 101: ...ALC Perform the Port 1 Power test in Chapter 4 Operational Performance Tests If the test fails proceed to Chapter 7 Troubleshooting If calibration fails q Verify that the GPIB cable is connected to t...

Page 102: ...is replaced Calibration Procedure Perform the following steps Equipment Required None NOTE Allow the VNA to warm up for at least 30 minutes and per form the ALC calibration Section 6 5 prior to perfor...

Page 103: ...p 1 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu Step 2 Select DIAGNOSTICS from the menu then select in se quence H W CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW_...

Page 104: ......

Page 105: ...S 7 6 7 5 UNDERSTANDING THE SERVICE LOG 7 7 7 6 DIAGNOSTIC DISPLAYS 7 8 7 7 ERROR MESSAGES DURING MEASUREMENTS 7 9 Lock Failure D or DE 60xx 7 9 Other Lock Failures 7 9 7 8 MEASUREMENT ACCURACY PROBLE...

Page 106: ...onnected Turn off the instrument and remove the line cord before removing any covers or panels Trouble shooting or repair procedures should only be performed by service per sonnel who are fully aware...

Page 107: ...37XXXD operation problems quickly and reliably often with warranted repairs Before removing the covers of the 37XXXD VNA be sure that static safety guidelines are followed as detailed in Section 1 12...

Page 108: ...connector from the motherboard connector Do not disconnect RF cables Step 5 When the faulty PCB or RF component is disconnected the VNA will power up but other error messages will appear After the de...

Page 109: ...Note the warning above before formatting Step 5 After the drive is reformatted turn off the 37XXXD insert Disk 1 in the floppy drive and load all disks again The Op erating software will be saved aut...

Page 110: ...ily available at retail stores q Cal LED is out after power cycling Cal LED was ON when power was turned off q Front Panel setup does not match setup when power was turned off q Internal Memories 1 th...

Page 111: ...tional or those that describe a GPIB command fault or GPIB response time out do not indicate prob lems with the instrument functionality Messages containing the words Phase Lock Failure are discussed...

Page 112: ...in troubleshooting the 37XXXD problems to the replaceable subassembly level These dis plays are found under the Option Menu Diagnostics Trouble shooting key sequence Other troubleshooting displays are...

Page 113: ...und in paragraphs farther down in this section The following additonal information sources are useful to solve this problem q Service Log Information q Troubleshooting Flowcharts Figures 7 2 or 7 3 q...

Page 114: ...easurement If only Test A is noted on the front panel error message s or OVL is present in the Service Log only in the A voltages section the prob lem is most likely a fault of the A3 PCB If only Test...

Page 115: ...Default Program 0 re set The calibration selected should be 12 Term Also perform the calibra tion using sliding terminations rather than broadband fixed termina tions Insufficient System Dynamic Range...

Page 116: ...NON RESPONSE OR OTHER UNUSUAL BEHAVIOR TROUBLESHOOTING 7 12 37XXXD MM Figure 7 2 Error Code DE Lock Failure Troubleshooting 50 and 65 GHz models only 1 of 3...

Page 117: ...r at Port 1 S21 Sampler DownConversion Module A4 or A8 failure A8 A4 or Sampler DownConversion Module failure transfer sw or A8 failure not logical Sampler DownConversion Module A4 or A8 failure Ref A...

Page 118: ...mal power at Port 2 S12 Sampler DownConversion Module A4 or A8 failure A8 A4 or Sampler DownConversion Module failure A8 transfer sw failure not logical Sampler DownConversion Module A8 or A4 failure...

Page 119: ...A1 PCB or Sampler Down Conversion Module Sampler Down Conversion Module A8 Sampler down conversion module transfer switch transfer switch A8 Sampler downconversion module transfer switch A8 A4 YIG os...

Page 120: ...Channel Display 50 GHz and above models only Wire Color Forward Reverse Brown 1 2 3 7 Grey 3 7 1 2 Table 7 4 Typical SPDT Switch part number 29855 Voltages CW Single Channel Display 50 GHz and above...

Page 121: ...DISK DRIVE 8 12 8 9 REAR PANEL ASSEMBLY 8 13 8 10 FAN ASSEMBLY 8 15 8 11 POWER SUPPLY MODULE 8 16 8 12 A18 REAR PANEL PCB 8 17 8 13 TEST SET MODULE ASSEMBLIES 8 18 8 14 SIGNAL SOURCE MODULES 8 21 Remo...

Page 122: ......

Page 123: ...ay result in damage to the assemblies Always observe the static sensi tive component handling precautions described in Chapter 1 Figure 1 2 37XXXD instruments are covered by a three year factory warra...

Page 124: ...de covers However if the front panel is to be removed remove the handle assemblies at this time Preliminary q Switch the VNA power off and remove the power cord Procedure Step 1 Loosen or remove the r...

Page 125: ...move the left cover n Place the VNA on its right side monitor down n If not already done remove the feet from the two left side corners at the rear of the VNA n Remove two center screws from the left...

Page 126: ...wer cord q Remove the top cover Section 8 3 A1 to A16 PCBs Procedure Step 1 Place the VNA in normal top side up position Step 2 Remove the two screws that secure the large card cage cover Figure 8 2 S...

Page 127: ...REMOVE AND REPLACE A1 TO A16 PCBS 37XXXD MM 8 7 A9 PCB Assembly Printed Circuit Board Assemblies A1 A8 PCB Assemblies A13 A16 Figure 8 2 A1 to A16 PCB Assemblies Removal Diagram...

Page 128: ...he VNA on its top bottom side up Step 2 Locate the A24 PCB assembly Figure 8 3 Unplug A24 PCB assembly from the A17 Motherboard PCB by gently pulling straight up on each side CAUTION Be careful not be...

Page 129: ...necessary to remove the front panel assembly to re place the floppy disk drive To replace a coupler or the floppy drive refer to Section 8 8 On instruments with Option 15V found only on 50 and 65 GHz...

Page 130: ...the nuts and washers that secure the Port 1 and Port 2 couplers bridges to the front panel casting Step 6 Disconnect the cable from the front panel Power switch to the power supply control PCB Step 7...

Page 131: ...odels remove the three hex head screws that attach each coupler to the front panel Step 11 Pull the front panel assembly several inches away from chassis Step 12 Disconnect the cable from the A17 Moth...

Page 132: ...propriate procedure to replace the LCD will depend on the presence or absence of Option 15 front panel RF access cables When Option 15 is installed the front panel should not be removed In this case r...

Page 133: ...uipment Required q Phillips Screwdriver 2 q Open end Wrenches various sizes Preliminary q Switch the VNA power to off and remove the power cord q Remove all covers Section 8 3 NOTE It is not necessary...

Page 134: ...e screws on each side of the chassis that fasten to the rear panel assembly Step 3 Remove the two screws located near top and middle of rear panel near fan mounting screws To replace the Rear Panel As...

Page 135: ...e Rear Panel Assembly on the work surface with the A18 Rear Panel PCB up Step 2 Disconnect the two conductor fan power cable at connector P6 of the A18 PCB Step 3 Turn the Rear Panel Assembly over and...

Page 136: ...nector black and white twisted pair Step 5 Remove the power supply from the 37000 frame by remov ing the 6 screws that fit through the left side of the frame Step 6 Tilt up the front end of the supply...

Page 137: ...8 3 Remove Replace Procedure Step 1 Disconnect all cables that are connected to the A18 PCB Step 2 Remove all eight 3 16 inch nuts that hold the various rear panel connectors Step 3 Remove all four 9...

Page 138: ...proper tools may damage the connectors resulting in degraded instrument performance Preliminary q Switch the VNA power to off and remove the power cord q Remove all covers Section 8 3 Remove Replace P...

Page 139: ...oupler Port 1 Bias Tee Port 1 Step Atten Transfer Switch Port 1 Down Conversion Module 2 Port 2 1 SDM s are present only on 40 GHz and above models 3 Do not disconnect the sampler from the Down Conver...

Page 140: ...Attenuator SDM Source Doubler Module Port 2 MUX Coupler Port 1 MUX Coupler Transfer Switch Port 1 Port 2 Down Conversion Module 1 37 GHz Hi Pass Filters Port 1 SQM Port 2 SQM Notes 1 The Down Conversi...

Page 141: ...roper tools may damage the connectors resulting in degraded instrument performance Preliminary q Switch the VNA power to off and remove the power cord q Remove all covers Section 8 3 Removal of Signal...

Page 142: ...me from the Source Module frame Step 8 Lift the Source Module up and remove by tipping the top to the right to clear the instrument frame To replace the Signal Source Module perform the steps above in...

Page 143: ...REMOVE AND REPLACE SIGNAL SOURCE MODULES 37XXXD MM 8 23 Figure 8 11 Signal Source Module Assemblies Removal Details...

Page 144: ...is section Step 2 Disconnect the Switched Filter assembly power cable from connector J1 of the A21A1 Source YIG Bias Control PCB Pull up gently on ribbon cable to disconnect Step 3 Similarly disconnec...

Page 145: ...e Signal Source Module Step 5 Disconnect the semi rigid coaxial line from connector J1 bottom of the Switched Filter assembly Put this coaxial line aside for re use NOTE When replacing the Switched Fi...

Page 146: ...r assembly Step 3 Remove the four screws that fasten the YIG Oscillator as sembly to the source module chassis and lift the assembly from the Signal Source Module Step 4 Disconnect the semi rigid coax...

Page 147: ...A 3 Pin Depth Problems A 3 Pin Depth Tolerance A 4 Avoid Over Torquing Connectors A 5 Teflon Tuning Washers A 5 Avoid Mechanical Shock A 5 Keep Connectors Clean A 5 Visual Inspection A 5 A 3 REPAIR M...

Page 148: ......

Page 149: ...tive pin depth when the center pin is too long in respect to the connector s ref erence plane Figure B 1 Before mating an unknown or new device with your VNA Port connec tors or calibration devices al...

Page 150: ...under this condition will likely damage the mat ing connector On the other hand if the test device connector indicates out of tolerance in the region the center pin is too short While this will not c...

Page 151: ...ned to withstand years of normal bench handling Do not drop or otherwise treat them roughly They are labo ratory quality devices and like other such devices they require careful handling Keep Connecto...

Page 152: ......

Page 153: ...he Lightning 37000D Vector Network Analyzers Technical Data Sheet Anritsu part number 11410 00350 can be downloaded from from the Anritsu Internet site http www us anritsu com This data sheet provides...

Page 154: ......

Page 155: ...chnical Data Sheet Anritsu part number 11410 00330 and ME7808C Technical Data Sheet Anritsu part number 11410 00410 can be downloaded from from the Anritsu Internet site http www us anritsu com Append...

Page 156: ......

Page 157: ...ER OPTIONS D 3 D 3 SYSTEM DESCRIPTION D 3 D 4 SYSTEM ADJUSTMENTS D 5 D 5 REPLACEABLE ITEMS D 5 D 6 PERFORMANCE AND OPERATIONAL TESTS D 7 D 7 MULTIPLEXING COUPLER CHECK D 21 D 8 TROUBLESHOOTING D 23 Ap...

Page 158: ......

Page 159: ...742A EW modules and the 37X97D VNA identified as Configuration 1 in Anritsu literature Operational and Maintenance information for other system configurations is very similar in many respects Details...

Page 160: ...D 4 37XXXD MM ME7808 BLOCK DIAGRAM ME7808 BROADBAND SYSTEM MAINTENANCE Figure D 1 ME7808B C Block Diagram...

Page 161: ...9XB Maintenance Manual part number 10370 10367 D 5 REPLACEABLE ITEMS Part numbers and descriptions of ME7808B C replaceable system cables and parts and shown in Tables D 1 and D 2 Replacement parts an...

Page 162: ...D MM Description Part Number Power Supply 15VDC 40 130 Fan Assembly ND58282 IF Amplifiers 60 279 IF Switches 1020 44 Isolator 1000 49 RF Splitter 1091 87 PCB Assembly 54074 3 Transfer Switch ND57971 T...

Page 163: ...wafer probe equipment if such support is desired For systems using the W1 coaxial test ports Multiplexing Couplers of all models performance verification of the system is accomplished by use of the A...

Page 164: ...another location so that the PC keyboard and the 37XXXD front panel are eas ily accessible Step 2 Press the Option Menu key Step 3 Select TEST SET CONFIG INTERNAL then press Enter to accept Step 4 On...

Page 165: ...Step 2 Set the power vernier knobs on the 3742A modules fully CW to set maximum power at the test ports Step 3 In this mode of operation most tests described below excluding Directivity and Coupler t...

Page 166: ...p 110 GHz CHANNEL MENU Dual Channels 1 3 GRAPH TYPE Log Magnitude both channels S PARAMS Channel 1 User Ratio a1 1 User Phase Lock a1 Channel 3 User Ratio b1 1 User Phase Lock a1 SET SCALE Resolution...

Page 167: ...a2 Channel 4 User Ratio b2 1 User Phase Lock a2 SET SCALE Resolution 10 dB Div both channels Reference Value 10 dB LIMITS Channel 2 a2 1 Upper Limit ON 1 dB Lower Limit ON 28 dB Channel 4 b2 1 Upper L...

Page 168: ...the random noise that exists in the system and cannot be accurately predicted or measured thus it cannot be removed by conventional error correction techniques Measurement calibration is not required...

Page 169: ...High level noise is the random noise that exists in the system It can not be accurately predicted or measured thus it cannot be removed by conventional error correction techniques Measurement calibra...

Page 170: ...3 Drift Test Step 1 Leave the equipment connected as described in the previ ous test High Level Noise Transmission Ensure the sys tem has warmed up for 2 hours Step 2 Change Graph Type to Log Mag and...

Page 171: ...ILITY MENU key Step 2 Press BEGIN CAL Step 3 Make the following selections from the menus to perform a full band 12 Term Calibration q Change Cal Method and Line Type q Waveguide q Full 12 Term q Incl...

Page 172: ...Step 2 Attach a second high precision waveguide section to the module on Port 1 Step 3 Attach a flush short to the end of the high precision wave guide section Step 4 While observing the sweep indica...

Page 173: ...difference of the values recorded in step 7 and step 8 This is the Peak to Peak Ripple value Use the RF Measurement Chart Table D 3 to find the correspond ing Return Loss value This value is the Effec...

Page 174: ...0 3138 0 2791 0 8714 0 7765 0 6919 0 6166 0 5495 1 0580 1 0515 1 0458 1 0407 1 0362 0 0282 0 0251 0 0224 0 0200 0 0178 31 32 33 34 35 31 32 33 34 35 0 2414 0 2155 0 1923 0 1716 0 1531 0 2483 0 2210 0...

Page 175: ...following formula to calculate the effective directivity value For ripple with negative trough Effective Directivity Return Loss value Absolute Value of Marker 3 REF X For ripple with positive peak Ef...

Page 176: ...ENU Start 65 GHz Stop 110 GHz CW Mode ON CHANNEL MENU Dual Channels 1 3 GRAPH TYPE Log Magnitude both Channels SET SCALE Resolution 10 dB division Reference Value 50 dB Reference Line 7 S PARAMS Chann...

Page 177: ...F50 adapter from the 3656 cal kit to connect the W1 m connectors of the Couplers together Step 2 Remove the mmWave modules from the test area and set the 37XXXD Test Set Configuration Option Menu key...

Page 178: ...og Magnitude SET SCALE Resolution 10 dB division Reference Value 0 dB Reference Line 8 S PARAMS S21 Step 3 Use the WR 10 Waveguide Calibration Kit to perform a 12 Term Broadband Load calibration Step...

Page 179: ...caused by ca bling synthesizer or GPIB setup errors isolate the prob lem instrument using the a process of elimination The crit ical information to know is direction only forward only reverse or both...

Page 180: ...indicated DC Power Supplies and General PCB Tests On the following test points of the 54074 3 PC board verify the follow ing DC voltages from TP8 ground approximately 10 All sup plies except the TP5 v...

Page 181: ...ce Location Required Signal Replace if Required Signal Fails TP 14 TTL low 37XXXD A8 PCB TP 9 5V 37XXXD A8 PCB or 3738A control PCB TP 10 0V 37XXXD A8 PCB or 3738A control PCB Port 1 LED ON Port 1 LED...

Page 182: ...tching or active components in this signal path once the signal has left the synthesizer Inside the 3738A the signal from the synthesizer is routed through an isolator through a splitter and then out...

Page 183: ...is above 65 GHz and are OFF when the system frequency is below 65 GHz Correct bias voltages at TP3 TP9 and TP10 are shown on the chart above System Dynamic Range Problem Ensure that both MG369XX synt...

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Page 185: ...internal hardware adjustments 1 6 introduction 6 3 LO1 calibration 6 3 LO2 calibration 6 5 RF power ALC calibration 6 10 source lock threshold 6 14 adjustments internal hardware 1 6 Adobe Acrobat 1 3...

Page 186: ...ule 8 22 test set module components layout 8 20 digital subsystem assemblies 3 20 to 3 21 digital subsystem block diagram 3 17 disk drive floppy removal 8 12 display liquid crystal removal 8 12 down c...

Page 187: ...9 non ratio power 4 10 non ratio stability 4 10 port 1 power 4 11 reflection noise 4 11 reflection sampler saturation 4 11 required equipment 4 7 running the test program 4 9 send random settings 4 14...

Page 188: ...source location diagram 2 9 signal source module 3 10 software 2300 178 1 8 2300 480 1 8 2300 496 1 8 verification 5 4 source lock block diagram 3 7 3 9 source lock threshold 6 14 to 6 15 source modul...

Page 189: ...00 480 1 8 2300 496 1 8 threshold adjustment source lock 6 14 to 6 15 torquing connectors A 5 transfer switch voltages typical 7 16 troubleshooting error code DE lock failure 7 12 functional level ass...

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