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Anritsu 373xxA 40GHz Vector Network Analyzer

1. os A8 DIA __ SOURCE SOURCE LOCK SIGNAL 10 MHz CONTROL P1P2 ku SEPARATION CONTROL t i P1 BIAS P2BIAS D A i i COUPLER BIAS TEE ts nce RB it Sua Hal loe t us E p T DET a 10MHZ SWITCHED IF BW 5 IN37217A 241 dp Ac TEST AIF IF SYNC FM 6MHz V AND BELOW 2 i Y i 10Hz 10KHz AD DRIVER 1974 isl Lolen meme mU WD 5 5 fes teste N 5 1 gt SWITCHED SDM XFERSWITCH y i SOURCELOCK 1
2. First LO Second LO 16 8 GHz A1 PCB A2 PCB Lowpass Ref A 357 536MHz 25 272MHz Filter 9 5 X4 Ref A 38 65 GHz 37 GHz Ref A 38 65 GHz f 16 25GHz 5 HiPass Filter J1 d SPDT Switch MUX Coupler 40MHz 65GHz Ref A forward 85 3 4 Ref B 38 65 GHz J2 SQM Sud 2 20GHz Reverse IFass Filter DCV Ref B J4 YIG Oscillator gt Rear 1 1 Ref B Panel J1 Switched Filter 38 65 Shaped Pad Access 40MHz GHz Loop 19GHz J5 J1 x2 05 pad Sampler Buffer Amp SDM Transfer Switch MUX Coupler reverse psi PI Ref A 40MHz 38GHz J5 3 dB gt Shaped Pad dB pad 6 3 3 dB pad 15 dB 221 J4 AOMHz 15 J3 Pag 65GHz Ref B Ref A Ref B t Ref B 40MHz 38GHz DCV Down Converter ALC Control PCB 49808 3 2 5 MHz CW YIG tuning currents SDM Control DC Control of SPDT voltage Switch transfer switch Bias Voltages to YIG buffer amp power Switched Filter amp ALC control Down Converter SAM J8 J7 J3 jd A8 PCB Digital and Analog Control 21 2 PCB P DC voltage 6 MHz Volt ji Source
3. Ties aah a TE EC 1 3 IDENTIFICATION NUMBER sees 1 3 ONLINE MANUAL ees tay Jon et bub ined a OS apie oa Of 1 3 SYSTEM DESCRIPTION a coe 1 4 RELATED MANUALS Say 1 4 STAN DARD OPTIONS S8 WES ae Sere aS ae CUR at ome a ae a 1 4 SERVICE STRATE GY Foe 4 aap aw Me 1 5 Functional Assembly Level Troubleshooting 1 5 Internal Hardware Adjustments and Calibrations 1 5 nternal Service Log rat Sos Enn a OL 116 1 5 System Test Certification 1 6 Preventive Service e Mass er aR ee ed 8 eg 1 6 Servicing Specially Modified Instruments gt 1 6 SERVICE SU PPORT Dhe ay abated ied ap fe 1 6 Technical Support hs MORAL CH e RE C 1 7 Field Service Kits xu 1 7 Service Software Es Xs POP eben px 1 7 Verification Kits 1 8 Test Fixtures Aids aps AL 1 8 Failed Assembly Exchange Program 22 77 1
4. 1 a o a 40 35 30 25 20 15 10 5 0 90 40 70 60 50 0 50 20 10 10 Device 511 dB Device S21 dB 373 D 15 D 16 Appendix Performance Verification Software User s Guide This appendix contains the Model 360X 37XXX Vector Network Analyzer Performance VerificationSoftware User s Guide This user s guide provides technical data and procedures that can aid you in performing maintenance on the 373XXA Subject Index Subject Index Number 37397A Source Lock Signal Path Diagram 5 26 37397A Test Signal Path Diagram 5 25 A 13 1 0 Interface 1 Assembly 7 15 14 I O Interface 2 PCB Assembly 7 15 A15 Graphics Processor PCB Assembly gt 7 16 16 Hard Disk PCB Assembly 7 16 17 System Motherboard Assembly 7 16 A18 Rear Panel Interface 7 17 18 REAR PANEL 8 22 8 24 A1 A9 and A13 A16 PCB Assemblies Removal Diagram ooo 8 7 A1 A9 AND A13 A16 PCBS 8 6 21 1 Source YIG Bias Control PCB 8 32 A21A2 ADJ USTMENT 37397 3 3 3 6 14 6 16 A21A2 Source Control PCB 8 31 24 BUS TERMINATOR 8 12 1 Buffer Amplifier Sampler Assemb
5. 5 1 2 5 MENUS 373XXA Start Self Test Read Service Log Appendix A Diagnostics Menus This appendix contains descriptions and usage information for the 373XXA Diagnostic Menus that are available via the front panel Op tion Menu key The internal diagnostic capabilities of the 373XXA are accessed via the Options Menu key which is part of the front panel Enhancement key group The selections available from the top level DIAGNOSTICS menu DG1 are listed below SeeFigure A 1 Start Self Test Read Service Log Installed Options Peripheral Tests Troubleshooting H W Calibrations D O O The START SELF TEST selection when invoked will automatically test circuits throughout the 373XXA Once invoked it requires no ex ternal devices or interaction by the user The net pass fail result of the self test is written tothe CRT screen Any self test failures will cause detailed failure information to be written intothe service log This menu is availableto service and non service personnel The READ SERVICE LOG menu allows for viewing printing dear ing and saving the internal system service log to floppy disk The CLEAR LOG function is not recommended for non service personnel The Service Log is made up of two parts thelog header and the error listing The log header contains key system parameters such as initial system tur
6. MENU ORP1 83800 MENU TRIG a 38800 TRIGGERS REAR PANEL Do TPUT MODE 9 MEASUREMENT OUTPUT MO OO INTERNAL OUTPUT ON OFF TEANAL SELECT MODE amp j oa 000 XXXXXXXXXX LF CALIBRATION FORLON f Is AUTOMATIC ON OFF GAIPHASE LOK LF CAL SCALING TRIGGER STARTILOCK al Enhancement LF CAL V PRESS lt ENTER gt TO SELECT OR TURN ON OFF VERTICAL SCALING RESOLUTION 1 000 V DIV REFERENCE VALUE 0 00 V MENU OFTNS PRESS lt ENTER gt 9pm MENU 001 OR TURN TRIGGERS DIAGNOSTICS REAR PANEL START SELF TEST OUTPUT DIAGROSTIGS p PEAD SERVICE LOG MULTIPLE INSTALLED OPTIONS SOURCE CONTROL MENU 665 SRC PERIPHERAL TESTS 4 2 HARDWARE CALIBRATION PRESS ENTER TROUBLESHOOTING FOR SERVICE TO SELECT WORSE YUE USE ONLY USE ONLY MENU DG5 H W CALIBRATIONS HARDWARE START SOURCE FOR SERVICE CALIBRATIONS P FREQ CALIBRATION VSE ONLY FOR SERVICE PRESS lt ENTER gt USE ONLY PREVIOUS MENU TO SELECT Lot PRESS lt ENTER gt CALIBRATION TO SELECT L02 CALIBRATION MENU DG5_ALC SOURCE FREQUENCY HARDWARE CALIBRATION CALIBRATION FOR SERVICE SOURCE ALC 6 USE ONLY CALIBRATION START ALC DISK FREQ CALIBRATION B OPERATIONS p a PREVIOUS MENU PREVIOUS MENU MENU OM1 PRESS lt ENTER gt PRESS lt ENTER gt TO SELECT MULTIPLE TO SELECT SOURCE CONTROL DEFINE BANDS MULTIPLE SOURCE MODE OFF DEFI
7. Port 2 Coupler Lt 1 5 7 7 m I LT LI i ul o5 Port 1 Step Attenuator ee 5 L LiH asi zi Port 1 MUX Coupler oa g Port 2 MUX Coupler m Mn 1 9 Transfer Switch ES go z 5 E SPDT Switch NI e AES _ p RE ie Power Amplifier e Sampler Buffer Amplifier Shaped Pads A24 PCB LS wm a ee o Floppy Disk Drive Assy Switched Doubler Module Port 2 37 GHz Hipass Filter Port 2 SQM 17 PCB Port 1 37 GHz Hipass Filter Port 1 SOM E A18 Rear Panel PCB Figure 2 3 Major Assemblies Location Diagram Bo
8. 6 7 RF CALIBRATION s n ne 6 8 Calibration Procedure lb 6 9 Post Calibration 7 cose Ino aioe ie deseo 6 10 SOURCE LOCK THRESHOLD 2 611 Calibration Procedure LOL ITE LEE 6 12 Post Calibration Actions ssc siete Pied pectore ert 6 12 A8 ADJ USTMENT 37397A re n me ue ee 6 13 Calibration Procedure da dcn os ae cla OR 6 13 Post Calibration Actions e peritos te amen 6 13 21 2 ADJUSTMENT 37397A s n 6 14 Calibration Procedure gt a MN Pe 6 14 Post Calibration Actions use pee e ue eot 6 15 Chapter 7 System Description 7 1 7 2 7 3 74 Ui INTRODUCTION RW matt i m ie Ky am Es rimo 6042 7 3 SYSTEM OVE RVIEW rrr n n ng ng t8 gt c ne es 7 3 ANALOG SUBSYSTEM ASSEMBLIES ses 7 7 Signal Source Module s sss n n te 7 7 Test Set Module 7 8 A7 PCB 10 MHz Timebase oos crees pe cred un ce gp uerum et 7 9 Receiver Module 0 desi ms RS URL TRI met e x Dm 7 10 8 Source Lock Signal Separation and Control 7 11 IF Section 410404040404 s s 004604040404 0404 404 3 3 9 3 9 3 c c3 7 11 7
9. Data Format 3 Points 101 Points 401 Points 1601 Points 32 Bit 340 1200 2600 7800 64 Bit 350 1200 2700 8300 ASCII 350 1280 3000 9300 Frequencies taken at 2 4 and 6 GHz PERFORMANCE SPECIFICATIONS EXTERNAL SCSI Provides SCSI 2 connector for con nection of an external SCSI hard disk drive Opt 4 EXTERNAL I O 25 DSUB connector EXTERNAL SCSI Provides SCSI 2 connector for con nection of an external SCSI hard disk drive Opt 4 SERIAL Provides control for AutoCal module LIMITS PASS FAIL Selectable TTL levels Pass 0V Fail 5V or Pass 5V Fail 0V Addi tionally 0 volts all displayed channels pass or 5V any one of 4 displayed channels fail output pass fail status 1 line EXTERNAL TRIGGER External triggering for 373XXA measurement 1V trigger 10 kohm input im GENERAL 37300A Front Panel Connectors and Controls Keyboard Input compatible keyboard can be connected to the front panel for navigating through front panel menus and disk directories annotation of data files and display labels printing displays and pausing in strument sweeps Test Ports Universal K male connectors are standard on all models except for 37397A which has V Connector test ports as standard For other configurations check Op tion 7 For additional configurations check Test Port Con verters Bias Inputs Port 1 and 2 0 5 amps maximum through BNC connectors Port 1 Amplifier
10. n n n n 1 9 Figure 1 1 Series 373XXA Vector Analyzer System 1 1 scope oF MANUAL 1 2 inTRODUCTION 1 3 IDENTIFICATION NUMBER 1 4 ONLINE MANUAL 373XXA MM Chapter 1 General Information This manual provides general service and preventive maintenance in formation for the ANRITSU 373XXA family of Vector Network Analyzer systems It contains procedures for Testing theinstrument for proper operation Verifying measurement accuracy and traceability to National 1 stitute of Standards and Technology NIST Troubleshooting a failed instrument to the exchange subassem bly level or the subsystem requiring adjustment Adjusting instrument internal sub systems Locating and replacing failed parts Throughout this manual theterms 373XXA and 373XXA VNA will be used interchangeably to refer to all Series 37300A Network Analyzer system models unless otherwise noted This chapter of the manual provides a general description of 373XXA VNA systems system serial numbers frequency ranges and related manuals Also included is information about the level of maintenance cov ered in this manual service strategy available service facilities and static sensitive component handling precautions A list of recommended test equipment is also provided All ANRITSU instruments are assigned a six digit ID number such as 401001 This number appears on a decal affixed to
11. 5 A D Converter PCB contains a six channel two stage switched filter sample and hold drcuit and a 20 bit A D converter Each of the six DC signals from the A4 and A6 PCBs are input to a sepa rate channel of the PCB The first stage of each channel is a low pass fil ter with four selectable cutoff frequencies of 10 kHz 1 kHz 100 Hz and 10 Hz The second stage of each channel is a sample and hold amplifier that stores the signals during the A D conversion process Each channel is sequentially selected for input tothe 20 bit A D converter The A5 A D Converter PCB also derives the 109 89 kHz Power Supply Synchronization Signal and the 80 kHz IF Synchronization Signal from the 10 MHz Reference Timebase Additional functions of the A5 A D Converter Assembly include Measurement of power supply voltages and other internal nodes of the 372XXB for diagnostic purposes Measurement of an externally applied analog input signal This function is used for service purposes only External Trigger Input signal processing from rear panel External Analog Output signal generation to rear panel The A D converter circuitry located on the A 5 PCB is used as a DVM to measure various internal system analog monitor points on the 1 A8 and 21 1 A21A2 PCBs It is also used to monitor power supply voltages and other critical points throughout the 373XXA which can be readout via the Diagnostics Menus DVM readings ar
12. Frequency Span Time ms 40 MHz to 40 GHz 500 20 GHz to 40 GHz 400 10 GHz to 11 GHz 250 TEST PORT CHARACTERISTICS The specifications in the following table apply when the proper Model 34U Universal Test Port Adapters are con nected with or without phase equal insertables to the test set ports and calibrated with the appropriate Anritsu or other designated calibration kit at 23 C 3 C using the OSL calibration method with a sliding load to achieve 12 Term error correction A 90 minute warm up time is rec ommended MEASUREMENT CAPABILITIES Number of Channels Four independent measurement channels Parameters S11 S21 S22 S12 or user defined com binations of a1 a2 61 62 All measurements made without the need to manually reverse the test device Measurement Frequency Range Frequency range of measurement can be narrowed within the calibration range without recalibration CW mode permits single frequency measurements also without recalibration In addition the D 4 system accepts N discrete frequency points where 2 lt Ns1601 Domains Frequency Domain CW Draw and optional High Speed Time Distance Domain Formats Log Magnitude Phase Log Magnitude and Phase Smith Chart impedance Smith Chart Admit tance Linear Polar Log Polar Group Delay Linear Magni tude Linear Magnitude and Phase Real Imaginary Real and Imaginary SWR Power Data Points 1601 maximum Data points ca
13. OSC Be INTERNAL REAR 2 20 GHz S H 68030 RAM BBRAM GEARS VGA PANEL p CTL PROCESSOR MONITORA HARD eo PCB S H E DISK DRIVE NG INTERFACE CTL QAM NM Wis uui uto EN 00 a te Sit tt eae pans 0 dece cS b VME BUS Stand oe So AD Lo Mec eo E DOWN d ph V v na L A 8s OK 000 d 00v tee iL FLOPPY GPIB CONV Su ont ANALOG DISK INTERFACE FILTER MUS DRVE fO 1 lll NE OP bias tee n i S H Tq et ee a cell Be dimer Gute Segal PORT 20 02096 Step Attenuator HARM 5 GEN QUIET BUS LO LO 1 2 a ena f pud cce QUIET BUS AID BUS INTERFACE INTERFACE EXTERNAL FRONT FLOPPY VME REAR PANEL REF OSC amp amp KEYBOARD PANEL DISK DRIVE INTERFACE INTERFACE CONTROL CONTROL INTERFACE INTERFACE CONTROL amp d CONTROL CONTROL LOGIC 10 MHz 5 4 pad values a channels b channels 37347B and below 2088 6db 37369B 6dB 3db For Models 37377A and 37397A see Figures 5 3 and 5 4 Figure 7 1 Overall Block Digram of 373XXA VNA Systen Model 37369A only SYSTEM OVERVIEW SYSTEM DESCRIPTION A A21A2
14. 03 lucc 7 12 5 A D Converter PCB 4040404 040404 2404 0 40 40 2 0 7 12 DIGITAL SUBSYSTEM 55 5 7 13 A9 Main Processor PCB Assembly 33777 7 13 13 1 0 Interface 1 Assembly 33777 7 15 14 1 0 Interface 2 Assembly 33777 7 15 A15 Graphics Processor PCB Assembly 7 16 A16 Hard Disk PCB Assembly 9 9 osteo recens orent ia 7 16 Floppy Disk DriveAssembly 555555555555 7 16 A24 VME Bus Terminator tt tts 7 16 373 7 5 MAIN CHASSIS ASSEMBLIES 7 16 17 System Motherboard Assembly 7 16 Front Panel Assembly 4 4 7 16 Rear Panel Assembly 5 iwi fag ole rie Oe 7 17 18 Rear Panel InterfacePCB 7 17 Supply Module oor ost Che ao Clay Ua He day 7 18 Internal VGA Monitor 6 740 47 7 19 Chapter 8 Remove and Replace Procedures 8 1 INTRODUCTION ub rai e fj cse qe Gam Psat igh soln tak n 8 3 8 2 EQUIPMENT REQUIRED s settee n n n gg t8 n8 n n 8 3 8 3 COVE RS D EON DECIES CE SECRET ME E E RES 8 4 8 4 A1 A9 AND 13 16 PCBS
15. 27 5 18 The following supply voltages are derived from the 18 supply voltages on the A13 I O 1 PCB 12V AQ A15 7 18 373 XXA MM SYSTEM DESCRIPTION Internal VGA Monitor 373XXA MM MAIN CHASSIS ASSEMBLIES The internal monitor assembly is powered from a dedicated AC Line from the Power Supply Module The degaussing and brightness con trols for theinternal monitor are located on the rear panel for easy cess by the operator There are no internal adjustments for this unit NOTE The internal monitor assembly is not a field repairable unit 7 19 7 20 Chapter 8 Remove and Replace Procedures Table of Contents 8 1 8 2 8 3 8 4 8 5 8 6 8 7 8 8 8 9 8 10 8 11 8 12 8 13 8 14 8 15 8 16 INTRODUCTION rie 8 3 EQUIPMENT REQUIRED a aD Mao neat Sa m E ae c 08 8 3 COVE RS RIT whe ue QT S E 8 4 1 9 AND 13 16 PCBS 22227 8 6 1 9 5 Wm s Gee a quA de ain cc 8 6 A13 A16 PCB s al a er E E Say cat poe cate wi a 8 6 9 BBRAM CHIP itai qe tap aia ter tat sda A Real NL wat dele vty ard 8 6 9 aT
16. 8 29 Remove and Replace 12 VME Bus Terminator PCB 8 12 13 16 5 Ede 8 6 18 Rear Pane 8 22 1 9 5 MM 8 6 A9 PCB BBRAM Chip 22 8 6 A9 PCB SRAM Battery 8 10 NUIT at RUE lI M 8 4 Equipment Required 8 3 Fan 8 21 Floppy Disk Drive 8 17 Front Panel Assembly 8 12 INTRODUCTION Cr ae eet ee eee TT 8 3 LCD de nS hr sec a wie ae 8 16 LCD Backlight Assembly 8 17 Power Supply Module 8 21 Rear Panel Assembly 8 19 Signal Source Modules 8 29 372XXB MM RTOS Test Set Modules Fc ca ee tine Seat Tee Toate Test Ret 8 25 VGA Display Monitor 8 14 REPAIR MAINTENANCE 5 REPLACEABLE SUBASSEMBLIES AND PARTS de a Exc E 2 3 RF POWER ALC CALIBRATION 6 8 6 10 RF Power ALC Calibration Adjustment 6 8 S Scope of 1 3 Screen Display Problems 5 10 Self Test net NE ach le
17. OM o REFB N OJ3 s 7 _ P wo B J1 A P2 A31J10 REF A TESTA Figure 8 14 A31 Buffer Amplifier Sampler Assembly Details 8 28 373XXA MM REMOVE AND REPLACE SIGNAL SOURCE MODULES Step 2 Disconnect the semi rigid coaxial line W81 from the input connector of the SDM see Figure 8 12 Step 3 Remove the two screws that fasten the SDM tothe Test Set Module tray Step 4 Disconnect the semi rigid coaxial line W80 from the output connector of the SDM see Figure 8 12 Carefully lift the as sembly from the Test Set Module replace the Switched Doubler Module assembly perform the steps above in the reverse order 8 17 SIGNAL SOURCE The following paragraphs provide instructions for removing and re MODULES placing the RF microwave components that comprise the Signal Source Module Equipment Required Connector torque wrench xin ANRITSU Model 01 201 or equivalent CAUTION Throughout these procedures always use the 5 in con nector torque wrench for connecting the Signal Source Module semi rigid coaxial lines and RF microwave compo nents Use of improper tools may damage the connectors resulting in degraded instrument performance Preliminary Switch373XXA power off Remove the power cord Remove all covers paragraph 8 3 Removal of Signal Use the following procedure to remove the Signal Source Module from Source Module thechassis This
18. Placethe 373XXA on its top bottom side up B Remove the feet from the two bottom corners at the rear of the 373XXA Remove the center screw from rear of the bottom cover m Lift and slide the top cover away from the 373XXA remove the left cover 373XXA MM REMOVE AND REPLACE COVERS Place the 373XXA on its right side monitor down If not already done remove the feet from the two left side corners at the rear of the 373XXA Remove two center screws from the left cover Remove the center screw from rear of the left side cover Lift and slide the side cover away from the 373XXA Step 5 To remove the right cover m Place the 373XXA its left side monitor up f not already done remove the feet from the two right side corners at the rear of the 373XXA Remove the center screw from rear of the right side cover Remove the center screw from rear of the right side cover Lift and slide the side cover away from the 373XXA To replace the instrument covers perform the steps above in the re verse order Loosen or remove handles see text Figure 8 1 Exploded View of 372XXB Chassis Covers 373XXA MM 8 5 1 9 AND A13 A16 PCBS REMOVE AND REPLACE 8 4 1 9 AND 13 16 This paragraph provides instructions for removing and replacing the PCBS A1 A9 and A13 A16 PCB s which are located underneath the cov ers of the large and small card cages respectively Prelimina
19. n8 nn 8 6 Al ES 9 5 7 E tay ak de E 8 6 A13 A16 PCB s wi Say Satta fate GS a 8 6 8 5 9 Br stat ohms Toe goat Faces Pca aah Peet 8 6 8 6 9 SRAM BATTERY sss t t t n t n n g n8 n 8 10 8 7 A24VME BUS TERMINATOR 2 22 8 12 8 8 FRONT PANEL ASSEMBLY s tr t t t t n n8 t8 87 8 12 8 9 VGA DISPLAY MONITOR sss tr t n n t n gt t n ng 8 14 8 10 LIQUID CRYSTAL DISPLAY LCD 8 16 8 11 FLOPPY DISK DRIVE Mr a 8 17 8 12 REAR PANEL ASSEMBLY s sete t t t g n8 n8 ng 8 19 8 13 FAN ASSEMBLY Bre goat Rt Poe a ca aca Dos AGED Kao piat E OE 8 21 8 14 POWER SUPPLY MODULE ss ccr n t n n t n n n8 7g 8 21 8 15 18 REAR PANEL 2 2 s tsetse tts 8 22 8 16 TEST SET MODULE ASSEMBLIES cn nes 8 25 Transfer Switch iat axis rep Gat Ge rang due Sys Rak Bata se 8 25 Input Coupler s Low F req 8 26 Amplifier ark Wisp det ith War tay assay sath Sam Sere eet aes 8 26 Buffer Amplifier Sampler A31 33 27 8 27 Switched Doubler ModuleAssembly 3 8 28
20. 3 5 mm Verification Kit Model 3666 Contains precision 3 5 mm Connector components with characteristics that are traceable to the NIST Use for Models 37347A and below with Option 7A GPC 7 Verification Kit Model 3667 Contains precision GPC 7 Connector components with characteristics that are traceable to the NIST Use for Models 37317A and below with Option 7A K Verification Kit Model 3668 Contains precision K Connector components that are traceable to the NIST V Verification Kit Model 36698 Contains precision V Connector components that are traceable to the NIST Thetest fixtures and test aids listed below are available through your lo cal ANRITSU Sales or Service Center Rear Panel Printer Port Test Fixture B39553 This test fixture is used to check out digital printer interface circuits on the rear panel assembly GPIB Cable 2100 2 This cable is used to check out digital GPIB interface circuits on the rear panel assembly The exchange program allows a customer to quickly exchange a failed subassembly for a factory refurbished fully system tested and unit that is under warranty This results in significant time and price savings as com pared with ordering a new assembly Refer to Chapter 2 Replaceable Parts for a complete list of exchange able assemblies for all Series 373XXA models NOTE When sending a failed assembly to the factory for ex change a copy of the Service Log must always ac
21. 35 dBc 37317A Nonharmonics Phase Noise center frequency 35 dBc standard gt 60 dBc Hz at 10 kHz offset and 20 GHz SOURCE FREQUENCY ACCURACY Standard Time Base Aging 1x 10S year Stability lt 1 x 10 over 15 C to 50 C range High Stability Time Base Option 10 Aging 1x 10 day Stability lt 5 x 10 over 0 C to 55 C range GROUP DELAY CHARACTERISTICS Group Delay is measured by computing the phase change in degrees across a frequency step by applying the for mula 1 d S 360 df Aperture Defined as the frequency span over which the phase change is computed at a given frequency point The aperture can be changed without recalibration The mini mum aperture is the frequency range divided by the num ber of points in calibration and can be increased to 20 of the frequency range without recalibration The frequency width of the aperture and the percent of the frequency range are displayed automatically Range The maximum delay range is limited to measur ing no more than 180 of phase change within the aper 373XXA MM PERFORMANCE SPECIFICATIONS ture set by the number of frequency points A frequency step size of 100 kHz corresponds to 10 ms Measurement Repeatability sweep to sweep For continuous measurement of a through connection RSS fluctuations due to phase and FM noise are 141 Phase Noise in deg x Residual FM Noise in Hz 360 Aperture in H
22. A13 I O Interface Z1 This PCB assembly performs the following functions PCB Assembly a Floppy drive control interface for the Floppy Drive Assembly External Keyboard control interface for the front panel K ey board connector Interface for the A18 Rear Panel PCB Assembly below Interface and control for the rear panel IEEE 488 2 GPIB Dedicated GPIB interface connectors A141 O Interface Z2 This PCB assembly contains a State Machine controller decode logic and PCB Assembly bus interface control circuits that perform the following functions Quiet Bus interface control The Quiet Bus passes control and data signals from the A9 Main Processor PCB tothe A1 8 and A21 PCBs and returns status and data signals back tothe A9 PCB This bus is managed by the control circuits on the A14 PCB such that it is inactive during the the time that a measure ment is being taken NOTE The output data from the A5 PCB A D converter is sent to the A9 Main Processor PCB via the Quiet Bus the A14 PCB and the VME Bus A D Bus interface control During the measurement process all A D selection and conversion functions on the A5 PCB are con trolled exclusively by the A14 PCB State Machine Controller This is accomplished via the command lines of the A D Bus Measurement control functions the A14 PCB State Machine Controller manages many of the 373XXA functions during a mea surement as follows B Quiet Bu
23. An attempt was made to turn on flat power correction or vector error correction when the corresponding calibration does not exist Current calibration is erased When turning on Multiple Source Mode with vector error correction on the calibration is destroyed Not really an error Message is issued as a warning Time Domain and CW mode not permitted An attempt was made to turn on a time domain mode in CW This is not permitted Not permitted in Time Domain An attempt was made to select a group delay display or CW mode when in time do main mode or to select a dual overlay display with a frequency time domain mismatch Time Domain not allowed An attempt was made to turn on a time domain mode but the current 373XXA state does not permit it Permitted only in diagnostic mode Must put the 373XXA into the diagnostics mode via the SDG command before using this mnemonic Graph types not appropriate for dual overlay While in dual overlay mode and attempt was made to change one of the active graph types to a type which conflicts with dual overlay or to change one of the active chan nels into or out of time domain which sets up a dual overlay conflict Or an attempt was made to select dual overlay mode when there would be a graph type conflict for a frequency time domain conflict New Discrete Fill not allowed in current state Cannot set up a new discrete fill definition while performing a calibration or
24. FILTER Above 20 GHz i Y IRM H gt sH its onl PA in AAA i unis i Des _ 89MHz i i MESE CC NA s 2 BUFFAMP 2 i _ gt 13 5GHz LPR j IREFERENCH A SOURCE X iE EXTENSION A2 x i 1 B4GHZLPF O 5 7 yr i 5 AID Quiet Bus B i x IRM X 5 5GHz LPF O ENS x Lol i OPTIONAL 1 3 2 LPF o REFERENCES i LOCK A6 t 9 1 L 5 Y MEI LVL X 2 gt p S H 1 y PRESE vec riii iU 2 ty sH CONVERTER 0 40 ys POWER OPTIONAL POWER R 254 m 1 D Soe 10 2 gt sync POWER i i IRM o SUPPLY Analog Monitor COMB EX 80KHz GENERATOR Ex 6 3 GHz FFO o timi Re EE E a 21 2 1 2 AT i SOURCE T LO 4 22 LO EXT 10M IN 9 CONTROL 7 5250 272 5MHz ALCe D A 1 2 RES EXT 10M OUT 5 7x 29 357 536 5MHz i dg mo 50KHz RES ist Soe Said L
25. Post Calibration After the calibration process is completed perform the following ac Actions tions as appropriate If calibration passes Savethe calibration data to hard disk as follows Step 1 Step 2 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu Select DIAGNOSTICS from menu Then select in se quence HAN CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW CAL SLT NOTE Also save the calibration data to floppy disk for archival purposes as a backup in case of a hard disk failure Label the disk with cali bration type date and system model and se rial numbers Set the copy protect tab on the disk Properly safeguard the disk so that it will be available later use as needed If calibration fails Repeat the calibration If it still fails then proceed to Chapter 5 Trou bleshooting 373XXA MM 6 15 Chapter 7 System Description Table of Contents 7 1 7 2 7 3 7 4 7 5 INTRODUCTION 7 3 SYSTEM OVERVIEW 410404046 404040404 0404 240404 0 040040404240 7 3 ANALOG SUBSYSTEM ASSEMBLIES sees 7 7 Signal Source Module lt 7 7 Test Set Module 410404040404 24040404040 404040404 2 40 4240 40 60 0 7 8 AIPCB 10 MHz Timebases s x9 xw ors rea oss 7 9 Receiver Module 41040404 04040404040 s os 4040 040404 4 40 40 7 7 10 A8 Source Lock Signal Separation and Control 7 11 IF
26. Step 1 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu 373XXA MM ADJUSTMENTS Post Calibration 6 FREQUENCY CALIBRATION 373XXA MM Actions FREQUENCY CALIBRATION Step 2 Select DIAGNOSTICS from menu Then select in se quence H W CALIBRATIONS then LO2 CALIBRA TION Step 3 Follow the directions displayed on the 373XXA CRT screen until calibration is completed After the calibration process is completed perform the following ac tions as appropriate If calibration passes Savethe calibration data to hard disk as follows 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 HAN CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW 102 NOTE Also save the calibration data to floppy disk for archival purposes as a backup in case of a hard disk failure Label the disk with cali bration type date and system model and se rial numbers Set the copy protect tab on the disk Properly safeguard the disk so that it will be available later use as needed If calibration fails Step 1 Repeat the calibration If it still fails then proceed to Chapter 5 Troubleshooting This procedure uses the internal 373XXA diagnostics and calibration menus in conjunction with a suitable frequency counter to adjust the sig nal source frequencies throughout the range o
27. cepts for the 373XXA presented in Chapter 1 prior to continuing with this chapter While using the troubleshooting procedures in this chapter refer alsothe the following information 5 3 RECOMMENDED TEST EQUIPMENT 5 3 5 4 5 4 RECOMMENDED TEST EQUIPMENT SYSTEM DOES NOT POWER UP Line Source and Interface Checks Power Supply Voltages Check TROUBLESHOOTING Appendix A Diagnostics Menus fully describes the 373XXA Di agnostics menu tree including the SERVICE LOG menu Appendix B Error Codes and Messages for details on each of the 373XXA hardware related error messages Chapter 6 System Description for a brief technical description of the 373XXA VNA system operation The recommended test equipment for the troubleshooting procedures pre sented in this chapter is listed in Chapter 1 Table 1 1 page 1 9 If the 373XXA does not power up when connected to a source of AC power and the Power key is pressed perform the power supply checks descri bed below WARNING Hazardous voltages are present inside the instrument when ac line power is connected 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 personnel who are fully aware of the potential hazards Check as follows Step 1 Step 2 Step 3 Verify that the AC power source 15 providing stable power at the correct l
28. des CIR gt Fame 8 10 A24VME BUS TERMINATOR 22 22 8 12 FRONT PANEL ASSEMBLY ss eet tres 8 12 VGA DISPLAY MONITOR s sss n n n ng gg gt t8 t t t7 8 14 LIQUID CRYSTAL DISPLAY LCD 2 8 16 FLOPPY DISK DRIVE i SITE UNT Eh e Tas iai E E Sal YR VR ae 15 8 17 REAR PANEL ASSEMBLY nr n t n ng t8 n8 n8 n8 n8 ng 8 19 FAN ASSEMBLY uu ME 8 21 POWER SUPPLY MODULE c scr n n n t n t n g sg 8 21 A18 REAR PANEL PCB urge Sa as a TSA v E FORI n 8 22 TEST SET MODULE ASSEMBLIES sn nr 8 25 Transfer Switch TOE E tat Vas Mat ca ay RE 8 25 Input Coupler s Low F req Bridge s 37 8 26 Power Amplifier Seer deh Bhs Np Er yas ae Saree 8 26 Buffer Amplifier Sampler A31 33 72 8 27 Switched Doubler ModuleAssembly 8 28 8 17 8 16 8 17 SIGNAL SOURCE MODULES 0 8 29 Removal of Signal Source Module sere 8 29 21 2 Source Control PCB ret ett 8 31 21 1 Source YIG Bias Control PCB 8 32 Switched Filter Assembly 72 8 33 Down Converter Assembly 5r ts 8 33 YIG Oscillator Assembly cr ll f n8 n nn 8 34 REMOVE REPLACE TEST SET MOD
29. 373XXA MM 9 PCB BBRAM CHIP OPTIONS TRIGGERS REAR PANEL OUTPUT DIAGNOSTICS MULTIPLE SOURCE CONTROL PRESS lt ENTER gt TO SELECT DIAGNOSTICS START SELF TEST READ SERVICE LOG INSTALLED OPTIONS PERIPHERAL TESTS TROUBLESHOOTING FOR SERVICE NLY H W CALIBRATIONS FOR SERVICE NLY PRESS ENTER TO SELECT HARDWARE CALIBRATIONS FOR SERVICE ONLY LO1 CALIBRATION 102 CALIBRATION SOURCE FREQUENCY CALIBRATION SOURCE ALC CALIBRATION DISK OPERATIONS PREVIOUS MENU PRESS lt ENTER gt TO SELECT H W CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK SAVE TO FLOPPY DISK RECALL FROM HARD DISK RECALL FROM FLOPPY DISK DELETE FROM HARD DISK DELETE FROM FLOPPY DISK COPY FROM_HARD TO FLOPPY DISK COPY FROM FLOPPY TO HARD DISK PREVIOUS MENU PRESS lt ENTER gt TO SELECT 8 8 REMOVE AND REPLACE Preliminary Before removing and replacing the BBRAM Chip it is necessary to save the following calibration data to the hard disk signal source quency ALC Source Lock Threshold LO1 and 2 Proceed as fol lows Step 1 Press the Option Menu key Enhancement key group to display the OPTIONS menu left Step 2 Select DIAGNOSTICS from the menu Then select in se quence HAN CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW CAL ALL NOTE Also savethe calibration data to floppy disk Label the disk with
30. Chapter 2 Replaceable Parts Table of Contents 2 1 INTRODUCTION I 2 3 2 2 EXCHANGE ASSEMBLY PROGRAM 2 3 2 3 REPLACEABLE SUBASSEMBLIES AND PARTS 2 3 2 4 PARTS ORDERING INFORMATION conf nnn zn 2 4 2 1 inTRODUCTION 2 2 EXCHANGE ASSEMBLY PROGRAM 2 3 REPLACEABLE SUBASSEMBLIES AND PARTS 373XXA MM Chapter 2 Replaceable Parts This chapter provides replaceable parts information for all 373XXA models The major replaceable 373XXA assemblies and parts are listed in Tables 2 2 through 2 8 The locations of these assemblies parts are shown in Figures 2 1 through 2 4 ANRITSU maintains a module exchange program for selected subassem blies If a malfunction occurs one of these subassemblies the defective item can be exchanged Upon receiving your request ANRITSU will ship the exchange subassembly to you typically within 24 hours You then have 45 days in which to return the defective item All exchange subas semblies or RF assemblies are warranted for 90 days from the date of shipment or for the balance of the original equipment warranty which ever is longer NOTE When sending a failed assembly to the factory for ex change a copy of the Service Log must always accom pany the failed assembly This copy may printout or a saved disk copy Due to the importance of the service log information to the ANRITSU factory Service Engineers the exchange p
31. TheND37200A 2 Field Service Kit is comprised of all major subas semblies of all models 40 Ghz and below high end frequency ND53269 Field Service Kit This kit provides for automated field test and performance verification of the 373XXA 50 65 GHz models 37397A It supplements kit ND37200A 2 The service software listed below is contained on the diskette located at the rear of this manual ANRITSU 37XXX Test Software 2300 178 This software contains a series of automated tests designed to insure the 373XXA signal paths are functioning properly and capable of sup porting stable calibrations and measurements See Operational Tests Chapter for details ANRITSU 37XXX Performance Verification Software 2300 237 This software is used to verify the 373XXA published measurement ac curacy and traceability to the U S National Institute of Standards and Technology NIST See Chapter 4 Performance Verification for de tails 1 7 SERVICE SUPPORT 1 8 GENERAL INFORMATION Verification Kits TheANRITSU Verification Kits listed below are used in conjunction with Test Fixtures Aids Failed Assembly Exchange Program the 37XXX Performance Verification Software above See Chapter 4 Per formance Verification for further information N Verification Kit Model 3663 Contains precision N Connector components with characteristics that are traceable to the NIST Use for Models 37317A and below with Option 7N and 7 NF
32. 373 MM vii viii 8 17 SIGNAL SOURCE MODULES rrr n6 nn nn 8 29 Removal of Signal Source Module 8 29 21 2 Source Control PCB ret ett 8 31 21 1 Source YIG Bias Control PCB 8 32 Switched Filter Assembly 555555555555 8 33 Down Converter Assembly 55 t 6 f 8 n n zn 8 33 YIG Osallator Assembly x mn genome orum eer 8 34 Appendix A Diagnostics Menus A 1 A 2 INTRODUCTION MX A 3 DIAGNOSTICS MENUS 3 Start Self Test lt lt lt o o e e e A 3 Read Service Log MN A 3 Installed Options s e e e KK A 4 TestS 3 so o a a a a A 4 Troubleshooting 3 ss A 4 H W Calibrations Se OR a hes A 5 Appendix B Error Messages B 1 B 2 B 3 B 4 B 5 INTRODUCTION s s Re eR B 3 OPERATIONAL ERROR MESSAGES sene B 3 DISK RELATED ERROR MESSAGES 3 GPIB RELATED ERROR MESSAGES sse B 3 SERVICE LOG ERROR MESSAGES B 3 0000 0099 MIL rx os 3 0100 3999 rat Seles 3 4000 4900 B 4 5000 5999 QU Sa em Sean Hal Gray ca aM B 4 6000 6999 EI XE fase B 4 7000
33. Performance Verification Software 1 4 Peripheral Tests 4 PERIPHERALS AND INTERFACES 3 6 3 9 PERIPHERALS INTERFACE 5 21 Phase Lock Error Codes 6000 Series 5 11 Pin Depth Problems Cas ae ma eae a a C 3 Tolerances SU Ba va cd CIN dee eds C 4 Pin Depth Tolerance 4 Power Amplifier 3332 8 26 Power Supply Module 7 18 POWER SUPPLY MODULE 8 21 Power Supply Module Check 5 6 Power Supply Voltages Check 5 4 Precautions Wim wes ow Sah cate ec ae ces Cae hs Eco C 3 PRECAUTIONS esse C 3 C 4 Preventive Service 1 6 Printed Circuit Assemblies 2 5 Printer Interface Test eres 3 7 Printer Interface Test Failures 5 22 Read Service Log n n nnn Rear Panel Assembly 7 17 REAR PANEL ASSEMBLY 8 19 8 20 Receiver Module wee METRO ME ae 7 10 RECOMMENDED TEST EQUIPMENT 1 9 1 11 Related Manuals PL EC MEE 1 4 RELATED MANUALS ccr 1 4 Removal of Front Panel Assembly 8 13 Removal of Signal Source Module
34. then in sequence se lect PERIPHERAL TESTS and then GPIB INTER FACE See diagram below 373XXA MM PRESS lt ENTER gt TO SELECT OPTIONS DIAGNOSTICS PERIPHERAL TESTS TRIGGERS START SELF TEST CRT DISPLAY REAR PANEL READ SERVICE LOG FRONT PANEL OUTPUT INSTALLED OPTIONS EXTERNAL KEY DIAGNOSTICS PERIPHERAL TESTS BOARD MULTIPLE SOURCE TROUBLESHOOTING PRINTER INTERFACE FOR SERVICE GPIB INTERFACE PRESS lt ENTER gt TO NLY PREVIOUS MENU SELECT HW CALIBRATIONS FOR SERVICE PRESS lt ENTER gt TO NLY SELECT Step 3 Follow instructions on the screen until test is completed If test fails proceed to Chapter 5 Troubleshooting SIGNAL PATH 3 5 SIGNAL PATH 3 10 OPERATIONAL TESTS These a series of automated tests designed to insure the 373XXA in ternal signal paths are functioning properly and are capable of support ing stable calibrations and measurements These test are performed us ing a software test program and an external computer controller The test software performs the following operations and tests Service Log Check Self Test Basic Sweep Operation and Speed Test High Level Noise Test System Stability Test Step Attenuators Accuracy and Repeatability Test Video IF Bandwidth Filters Operation Test Sampler Efficiency and Stability Test LO1 LO2 Linearity Test Source FM Lock Signal Linearity Test Power Generation and Contro
35. 2 410 Church Street North Parramatta NSW 2151 Australia Telephone 026 30 81 66 Fax 026 83 68 84 BRAZIL ANRITSU ANRITSU ELECTRONICA LTDA Praia de Botafogo 440 SL 2401 Botafogo 2225 Rio de Janeiro RJ Brasil Telephone 021 28 69 141 Fax 021 53 71 456 CANADA ANRITSU ANRITSU INSTRUMENTS LTD 215 Stafford Road Unit 102 Nepean Ontario K2H 9C1 Telephone 613 828 4090 FAX 613 828 5400 CHINA ANRITSU BENING SERVICE CENTER REPLACEABLE PARTS All parts listed in Tables 2 2 through 2 8 may be ordered from your local ANRITSU service center Table 2 1 Or they may be ordered directly from the factory at the following address ANRITSU Company ATTN Customer Service 490 J arvis Drive Morgan Hill CA 95037 2809 Telephone 408 778 2000 FAX 408 778 0239 416W Beijing Fortune Building 5 Dong San Huan Bei Lu Chao Yang Qu Beijing 100004 China Telephone 86 1 50 17 559 FAX 86 1 50 17 558 FRANCE ANRITSU ANRITSU S A 9 Avenue du Quebec Zone de Courtaboeuf 91951 Les Ulis Cedex Telephone 016 44 66 546 FAX 016 44 61 065 GERMANY ANRITSU ANRITSU 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 3959 FAX 011 686 6720 ISRAEL TECH CENT LTD Haarad St No 7 Ramat Haahayal Tel Aviv 69701 Telephone 03 64 78 563 FAX 03 64 78 334 ITALY ANRITSU ANRITSU
36. 4 Using DMM and or an oscilloscope measure the power supply voltages at the power supply connector pins that correspond to the Motherboard pins for the 9 18 and 27 Vdc supplies Refer to Table 5 1 and Figure 5 1 previ ous page Steps 5 through 8 check the 45 volt supply This power supply re quires at least a 10 load to turn on Therefore at least one of the dig ital PCBs 9 A13 or 14 which use the 5 volt supply must be in stalled in the system during this procedure Step 5 Press the 373XXA Power key off and reconnect the power supply module to the Motherboard at J 4 Step 6 Unplug digital PCB s A13 and 14 Step 7 Press the 373XXA Power key on 373XXA MM TROUBLESHOOTING 5 5 SYSTEM DOES NOT BOOT UP 373XXA MM SYSTEM DOES NOT BOOT UP Step 8 Usinga DMM and or an oscilloscope measure the 5 volt power supply at connector 13 on the Motherboard Refer to Figure 5 1 and Table 5 1 page 505 Step 9 Press the 373XXA Power key off and and reinstall the A13 and A14 PCB s removed in Step 6 If any of the DC voltage tests fail in steps 1 through 8 above replace the power supply module If any of the DC voltage tests fail with the power supply module con nected to the 373XXA Motherboard but pass with it disconnected then the most probable cause of the failure is that one of the 373XXA assemblies is demanding an excessive amount of current To locate the failed assembly 1 Pres
37. DOES NOT POWER UP 3 99999999999 5 4 Line Source and Interface Checks 5 4 Power Supply Voltages Check ts 5 4 Power Supply Module Check 5 6 SYSTEM DOES NOT BOOT UP s 99999999999 5 7 Boot up Process Sequence 410404040404 24040404040 XV 5 7 Troubleshooting Boot up Problems 5 8 Disk Problem 1 525 949 8 f f f n n n n n n 5 8 Hard Disk Problem 5 9 Floppy Disk Problems e EN cR Pe ali e 5 9 Screen Display Problems gt eorom i y oma cens 5 10 SYSTEM HAS ERROR CODE lt 5 10 Phase Lock Error Codes 6000 Series 5 11 Service Log Snap Shot Data este ety RO eon 5 12 SOURCE TEST SET RECEIVER 999999 5 17 Signal Source Phase Lock Loop Assemblies 5 17 Signal Source Test Set Module Error Codes 5 18 sol ation Procedures Wu sur RR dat 5 19 PERIPHERAES INTEREACGEB xs se arises Ioh ce 5 21 CRT Display Test Failures 5 21 Front Panel Test Failures on ena 5 22 External Keyboard Interface Test Failure 5 22 Printer Interface Test Failures cn ee Gok 5 22 GPIB Interfa
38. Filename too long The maximum ledngth for filenames is 8 characters An extension is not permitted Floppy disk read error Floppy disk write error Hard disk read error Hard disk write error Read or write error s occurred while attempting to access the indicated disk Floppy disk not found Hard disk not found General disk buffer error General floppy drive failure Floppy disk init failure General hard disk failure Hard disk control failure Hard disk init failure Unknown disk error Other error messages which suggest that the indicated drive is in need of service 7205 GPIB QUERY ERROR DESCRIPTIONS No Response data available Generated if the controller attempts to read response data from the 373XXA and none is available No Response data after PM completion This is the same as the no response data available case above except that a pro gram message was currently being parsed and executed when the controller at tempted to read data Detection of this error was deferred until the parser execution block was finished with the current program message and it was observed that no re sponse data was generated 373XXA MM B 13 SERVICE LOG ERROR MESSAGES APPENDIX B Table 3 Error Messages 7 of 8 Error Message Description Response after Indefinite Re sponse discarded This error is generated when the 373XXA s output queue has already received an Ar bit
39. Flexible Cables 25 in 1 pair 3671A50 2 GPC 7 Flexible Cable 38 in 3671S50 1 3 5mm Flexible Cables 25 in 1 pair male male 3671550 2 3 5mm Flexible Cable 38 in male 3671K50 1 K Connector Flexible Cables 25 in 1 pair male male 3671K50 2 K Connector Flexible Cable 38 in male 3671V50 1 Universal Test Port Converter On Each Side moving the VNAs V type test port converter to the end of the cable 25 in 2 each 3671V50 2 Universal Test Port Converter On Each Side moving the VNAs V type test port converter to the end of the cable 38 in 1 each NOTE All 3671 Series flexible test port cables mate to the standard 34UK50 Universal K Connector Test Port TEST PORT CONVERTERS 34UA50 Test Port Converter Universal GPC 7 APPENDIX D 34UK50 Test Port Converter Universal K Connector male 34UN50 Test Port Converter Universal N male 34UNF50 Test Port Converter Universal N female 34UQ50 Test Port Converter Universal 2 4 mm male 34US50 Test Port Converter Universal 3 5 mm male 01 202 Wrench for changing test set Test Port Converters GPIB CABLES 2100 1 GPIB Cable 1 m 3 3 ft 2100 2 GPIB Cable 2 m 6 6 ft 2100 4 GPIB Cable 4 m 13 2 ft 2100 5 GPIB Cable 0 5 m 1 65 ft ACCESSORIES 2000 660 HP 310 Deskjet Printer Printer Stand Deskjet Printer Cartridge and Power cord 2000 661 Extra Printer Cartridge 2000 662 Rechargeable Battery 2000 663 Power Cable Europe 2000 664 Power Cable Australi
40. IF Bandwidth for 101 Data Points typical IF Bandwidth Time ms 10 kHz 350 1 kHz 530 100 Hz 1900 10 Hz 14000 D 3 PERFORMANCE SPECIFICATIONS APPENDIX D 422 Reflection Transmission Connector er A Eu dE Frequency Frequency Track t Tracking dB ing dB GPC 7 0 0225 gt 52 gt 44 gt 52 0 003 0 004 gt 105 2 0 gt 52 gt 44 gt 52 0 003 0 004 gt 115 18 gt 52 gt 42 gt 52 0 004 0 012 gt 112 GPC 7 LRL 2 0 gt 60 gt 60 gt 60 0 001 0 001 gt 115 Calibration 18 gt 60 gt 60 gt 60 0 001 0 001 gt 112 N Type 0 0225 gt 46 gt 36 gt 46 0 004 0 004 gt 105 2 0 gt 44 gt 36 gt 44 0 004 0 004 gt 115 18 gt 40 gt 32 gt 40 0 005 0 012 gt 112 3 5 mm 0 0225 gt 44 gt 40 gt 44 0 005 0 030 gt 105 2 0 gt 44 gt 40 gt 44 0 005 0 030 gt 115 20 gt 44 gt 38 gt 44 0 006 0 050 gt 110 26 5 gt 44 gt 34 gt 44 0 006 0 070 gt 102 0 0225 gt 42 gt 40 gt 42 0 005 0 030 gt 105 2 0 gt 42 gt 40 gt 42 0 005 0 050 gt 115 20 gt 42 gt 34 gt 42 0 006 0 070 gt 110 40 gt 38 gt 34 gt 38 0 006 0 080 gt 100 V 0 04 gt 70 gt 36 gt 40 0 050 0 030 gt 105 2 0 gt 40 gt 36 gt 40 0 050 0 050 gt 115 20 gt 40 gt 36 gt 40 0 060 0 070 gt 110 40 gt 36 gt 32 gt 36 0 060 0 080 gt 100 50 gt 34 gt 30 gt 34 0 080 0 100 gt 90 65 gt 34 gt 28 gt 34 0 100 0 120 gt 80 Measurement Time vs Span for 101 Data Points typi cal
41. Lock RF 2 5 MHz CW a A4 PCB 4 4 Component Control Reference IF Processor NOTE Sampler Buffer amplifiers are individually matched to Power Amplifiers If either fails both should be replaced with another matched set part number ND53249 Indicates not present on model 37297B or 372778 Figure 5 4 37397A Source Lock Signal Path Diagram 5 26 373 MM Chapter 6 Adjustments Contents 6 1 INTRODUCTION 3 6 2 LOL CALIBRATION wl uu Pea Calibration a Post Calibration Actions sre 6 3 LO 2 CALIBRATION Calibration Procedure 33 37 Post Calibration Actions 37 6 4 FREQUENCY CALIBRATION 2 see Calibration Procedure soso o o a Post Calibration Actions 377 6 5 RF POWER ALC CALIBRATION 9999998 Calibration Procedure 33 27 Post Calibration Actions 3 6 6 SOURCE LOCK THRESHOLD Calibration Procedure n nne Post Calibration Actions 6 7 8 ADJ USTMENT 37397A sss Calibration Procedure t n nne Post Calibration Actions 6 8 21 2 ADJUSTMENT 37397 Calibration Procedure r
42. Loop Access to insert an external amplifier ahead of the port 1 coupler or bridge to in crease port 1 power output up to 30 dBm 1 watt maxi mum 37300A Rear Panel Connectors and Controls PRINTER OUT Centronics interface for an external printer VGA OUT Provides VGA output of 373XXA video dis play 10 MHz REF Connects to external reference fre quency standard 10 MHz 5 to 5 dBm 50 ohms BNC female 10 MHz REF OUT Connects to internal reference fre quency standard 10 MHz 0 dBm 50 ohms BNC female EXT ANALOG OUT 10V to 10V with 5 mV resolu tion varying in proportion to user selected data e g fre quency amplitude BNC female EXT ANALOG IN 50 volt input for displaying external signals on the CRT in Diagnostics mode BNC female LINE SELECTION Power supply automatically senses 100V 120V 220V or 240V lines EXTERNAL TRIGGER External triggering for 373XXA measurement 1V trigger 10 kohm input impedance BNC female REFERENCE EXTENSION Provides access to a1 and b1 samplers K or V Connector female D 9 pedance BNC female EXT ANALOG OUT 10V to 10V with 5 mV reso lution varying in proportion to user selected data e g frequency amplitude BNC female Power Requirements 85 240 48 63 Hz 540 maxi mum Dimensions 267 x 432W 585D mm 10 5 x 17W x 23D in Weight 34 kg 75 Ib Maximum amount specified for 2 man lift requirement ENVIRONMENTAL S
43. PCB assembly provides all bias and control signals for the SDM The YIG tuned oscillator generates a high power RF output signal that has low broadband noise and low spurious content The frequency of the YI G tuned oscillator is controlled by means of TheYIG main tuning coil TheYIG FM finetuning coil The system A9 Main Microprocessor PCB sends the data that repre sents the desired operating frequency to the A21A2 Source Control PCB which converts the frequency data to analog signals These sig 7 7 ANALOG SUBSYSTEM ASSEMBLIES 7 8 Test Set Module SYSTEM DESCRIPTION nals are then sent to the A21A1 YI G Bias Controller PCB This PCB converts the analog signals to YIG main tuning coil current The main tuning coil current from A21A1 YIG Bias Controller PCB coarsely tunes the YI G tuned Oscillator to within a few megahertz of the final output frequency The YIG phase lock loop then fine tunes the YI G tuned oscillator to the exact output frequency via the FM fine tuning coil The fundamental frequency source signal is leveled by a PIN Diode at tenuator that is part of the Switched Filter Assembly This attenuator is controlled by the Automatic Leveling Control ALC circuits that are located on the A21A2 Source Control PCB The input tothe ALC cir cuits is the DC feed back signal from the leveling detectors located in the Test Set Module Depending on the frequency of operation the fundamental signal is p
44. RR e EE e C 3 Pin Depth Problems C 3 Pin Depth Tolerance gt gt gt o ooo 4 Avoid Over Torquing Connectors cnn n C 4 Teflon Tuning Washers sss n n t n n n g C 4 Avoid Mechanical Shock o o o o n n n n C 4 Keep Connectors Clean gt s n n n n n n C 4 Visual Inspection ee 5 REPAIR MAINTENANCE 6 C 5 1 INTRODUCTION 2 PRECAUTIONS Pin Depth Problems REFERENCE REFERENCE PLANE PLANE lt gt PIN PIN DEPTH DEPTH INCHES INCHES FEMALE MALE Figure C 1 Connector Pin Depth Definition Figure C 2 Pin Depth Gauge 373XXA MM Appendix C Connector Maintenance Check Procedures This appendix provides general precautionary information and in structions pertaining to precision connectors The following paragraphs are precautionary notes relating to mainte nance considerations for precision connectors Based on ANRITSU precision components returned for repair destruc tive pin depth of mating connectors is the major cause of failurein the field When a precision component is mated with a connector having a destructive pin depth damage will likely occur to the precision compo nent s connector A connector is considered to have destructive pin depth when the center pin is too long in respect to the connector s ref erence plane Figure C 1 Before mating an unknown or new device with you
45. Section 410404040404 240 40 404004040404 040404040 604004042 c c 7 11 7 03 7 12 A5 A D Converter PCB 4040404 040424040404 0 4 4040 40040040 0 0 0 7 12 DIGITAL SUBSYSTEM 55 5 7 13 A9 Main Processor 2 7 13 13 1 0 Interface 1 Assembly se 7 15 14 1 0 Interface 2 Assembly 7 15 A15 Graphics Processor PCB Assembly 7 16 A16 Hard Disk PCB Assembly 5525 3 x oe vens 7 16 Floppy Disk DriveAssembly 7 16 A24 VME Bus Terminator PCB scs ecu ck nre edere eng 7 16 MAIN CHASSIS ASSEMBLIES s s tomm mre 7 16 A17 System Motherboard Assembly 7 16 Front Panel Assembly 7 16 Rear Panel Assembly MCN 7 17 A18 Rear Pane Interface PCB 55 cy toy ones 7 17 Power Supply Module 7 18 Internal VGA Monitor ay cated atta Oa Cay a Cts Re T 7 19 7 1 7 2 SYSTEM OVERVIEW 373XXA MM Chapter 7 System Description This chapter provides a brief overview of the functional assemblies and major parts that comprise a typical Series 373XXA VNA system It also briefly describes the operation of each major assembly Series 373XXA Vector Network Analyzers are rat
46. Sp A Roma Office Via E Vittorini 129 00144 Roma EUR Telephone 06 50 22 666 FAX 06 50 22 4252 JAPAN ANRITSU CORPORATION 1800 Onna Atsugi shi Kanagawa Prf 243 Japan Telephone 0462 23 1111 FAX 0462 25 8379 KOREA ANRITSU CORPORATION 2103 Korea World Trade Center 159 1 Samsung Dong Kangnam ku Seoul Telephone 02 551 2250 FAX 02 551 4941 SINGAPORE ANRITSU ANRITSU SINGAPORE PTE LTD 3 Shenton Way 24 03 Shenton House Singapore 0106 Telephone 011 65 2265206 FAX 011 65 2265207 SWEDEN ANRITSU ANRITSU AB Box 247 5 127 25 Skarholmen Telephone 08 74 05 840 FAX 08 71 09 960 TAIWAN ANRITSU LTD 8F No 96 Section 3 Chien Kuo N Road Taipei Taiwan R O C Telephone 02 515 6050 FAX 02 509 5519 UNITED KINGDOM ANRITSU ANRITSU LTD 200 Capability Green Luton Bedfordshire LU1 3LU England Telephone 05 82 41 88 53 FAX 05 82 31 303 373 XXA REPLACEABLE PARTS Table 2 2 Printed Circuit Board Assemblies PARTS ORDERING INFORMATION 2 Assembly Part Part Number Al LO1 D46866 3 A1 LO1 D86866 4 A2 LO2 D50725 3 A3 Test A IF D38503 4 A4 Reference IF D41794 3 A4 Reference IF D41794 4 A5 A D D38505 3 A6 Test B IF D38503 5 A7 LO3 D38507 3 A7 Opt 10 LO3 D38507 4 A8 Source Lock Separation Control D47488 3 A8 Source Lock Separation Control D49334 3 A9 Main Processor
47. as the Printer Test Connector ANRITSU PN B39553 a GPIB cable and an external compatible keyboard as appropriate for the specific test This menu is availableto service and non service personnel The TROUBLESHOOTING menu DG4 and its sub menus provide a host of pre defined internal system modes and sub system monitors that provide information useful in evaluating proper system operation Most of these modes do not require any interaction or external test fix tures An exception is the FIRST IF BANDPASS selection which re quires a thru line to be connected between the test ports Menu DG4A and its sub menus provide low level access to internal system hardware These menus allow the user to control system latches switches and DACs They also allow selection of key system states such as set on or search for lock Many internal analog voltages may be monitored via the 373XXA built in DVM monitor network 373XXA MM APPENDIX DIAGNOSTICS MENUS CAUTION Always exit the troubleshooting mode via the DG4 menu selection FINISHED RECOVER FROM TROUBLE SHOOTING to insure proper system state recovery from your troubleshooting activities These menus for service personne only H W Calibrations TheH W CALIBRATIONS menus perform various internal automated hardware calibrations including ALC and Frequency calibrations The following equipment is required for these tests HP 437B Power Meter or Gigatronics 8541 42 P
48. described below Refer alsoto the Model 360X 37XXX VNA Perfor mance Verification Software Users Guide P N 10410 00162 which is lo cated in Appendix E at the rear of this manual This Software Users Guide explains in detail the procedures to be used for the installation and operation of the Verification Software on your computer controller Equipment required ANRITSU 37300A Verification Software PN 2300 237 Version 3 1 or above of 2300 237 software is necessary to verify the 37397 External computer controller refer to Table 1 1 located on page 1 9 4 5 KEY SYSTEM PARAMETERS 4 5 KEY SYSTEM 4 6 PARAMETERS Measurement Environment Considerations PERFORMANCE VERIFICATION ANRITSU Verification Kit appropriate for the 373XXA model refer to paragraph 4 3 GPIB cable ANRITSU PN 2100 2 or equivalent Procedure Step 1 Usingthe GPIB cable connect the external computer con troller tothe IEEE 488 2 GPIB Interface port on the 373XXA rear panel Step 2 Insert the CD ROM into its drive and install the 2300 237 software Step 3 Follow the directions displayed on the computer screen to perform all tests If the calibration fails check the connectors of the calibra tion kit devices and the impedance transfer standards for damage deanliness and proper connection and torquing These are the most common causes for verification failures If the problem persists check system Directivity Match and Dynam
49. drive with no floppy disk installed Floppy disk full An attempt was made to write to a floppy disk or the hard disk when no space was left Hard disk full on the disk B 12 373XXA MM APPENDIX B SERVICE LOG ERROR MESSAGES Table B 3 GPIB Related Error Messages 6 of 8 Error Message Description Floppy disk write protected An attempt was made to write to a write protected floppy disk Recalled setup or data file cor rupt An attempt to recall a setup from internal memory the GPIB or disk failed due to soft ware revision or hardware mismatch or checksum error New frequency list not allowed in current state Cannot set up a new discrete fill definition while performing a calibration or when cor rection is turned on Also cannot do this when group delay is the graph type on the active channel State change not permitted An attempt was made to perform an illegal state change or action based on the cur rent instrument state This includes attempting to store 1 an undefined band defini tion 2 certain changes from the calibration state or 3 the cal define state when defining discrete frequencies Faulty label or file name The label or file name associated with the current mnemonic is faulty Illegal characters in filename The first character in a filename must be an alpha type The remaining characters can be alpha numeric or underscores An extension is not permitted
50. example four for a two term window For a 40 GHz sweep range with 1601 data points the unaliased range is 40 025 nanoseconds For a 65 GHz sweep with 1601 data points the unaliased range is 24 646 nanoseconds Frequency with Time Gate Data that has been con verted to time domain and selected by the application of gating function may be converted back to the frequency domain This allows the display of the frequency response of a single element contained in the device under test Fre quency response accuracy is a function of window and gate type and gate width For a full reflection minimum gate and window accuracy is within 0 2 dB of the ungated response over a 40 GHz range MEASUREMENT UNCERTAINTY The graphs on pages D 13 through D 15 give measure ment accuracy after 12 term vector error correction The errors are worst case contributions of residual directivity load and source match frequency response isolation net work analyzer dynamic accuracy and connector repeatabil ity In preparing the following graphs 10 Hz IF bandwidth and averaging of 512 points were used measured at 23 3 C Changes in the IF bandwidth or averaging can result in variations at low levels SYSTEM OPTIONS OPTION 1 Rack Mounting Rack mount kit containing a set of track slides 90 tilt capability mounting ears and front panel handles to let the instrument be mounted in a standard 19 inch equipment rack OPTION 1A Rack Mounting Rack mounti
51. files on the hard disk Before starting the disk formatting process copy any files you wish to save to a floppy disk 373XXA MM TROUBLESHOOTING SYSTEM DOES NOT BOOT UP Step 2 Press the Utility Menu key System State key group to dis play the UTILITY FUNCTIONS OPTIONS menu From menu select GENERAL DISK UTILITIES see below SELECT UTILITY FLOPPY DISK HARD DISK FUNCTION OPTIONS UTILITIES UTILITIES GPIB ADDRESSES DISPLAY DISPLAY DISPUN DIRECTORY DIRECTORY INSTRUMENT DELETE FILES DELETE FILES GENERAL Sb Blox SA Ssk DISK UTILITIES Satan Sine CALIBRATION FLOPPY DISK HARD DISK ONES HARD DISK gt FLOPPY DISK UTILITIES UTILITIES PRESS lt ENTER gt PRESS lt ENTER gt TO SELECT SELECT PRESS lt ENTER gt TO SELECT Step 3 If FLOPPY DISK UTILITIES menu appears select HARD DISK UTILITIES Step 4 From HARD DISK UTILITIES menu select FORMAT HARD DISK Step 5 After formatting is complete reload System Software from the master floppy diskettes Retry boot up If fail contact ANRITSU Customer Service Center Hard Disk Problem 2 If system does not bootup from hard disk and floppy disk Step 1 When the five initializing messages are displayed after power on press any key within 2 seconds Step 2 Follow the instruction on the display to format the hard drive After formatting is complete reinstall system soft ware from the master floppy diskettes Retry boot up Step
52. list of permissible values for that parameter CW marker sweep not permitted in time domain The mnemonics M1C M2C M3C M4C M5C and 6 are forbidden in time domain Parameter unavailable in fre quency domain The mnemonic ODV and OTV are forbidden in frequency domain Port 2 Test Attenuator OPT 6 not installed The mnemonic 2 is forbidden when the attenuator is not installed Time Domain OPT 2 not in stalled An attempt was made to use one of the time domain mnemonics when the option is not installed Return to Local not permitted in Local Lockout The mnemonic RTL failed due to being in the Local Lockout mode Calibration does not exist An attempt was made to turn on flat power correction or vector error correction when the corresponding calibration does not exist Cal term not available An attempt was made to get a calibration term which does not exist for the current calibration type 373 XXA MM B 9 SERVICE LOG ERROR MESSAGES APPENDIX B Table 3 GPIB Related Error Messages 3 of 8 Error Message Description Invalid cal term for calibration type An attempt was made to program a calibration term which does not exist for the cur rent calibration type Front panel setup not valid An attempt was made to get a front panel setup that did not contain a correct valid state Normalization data not valid An attempt was made to reference no
53. may have service requirements different from those specified in this manual Contact your local Service Center if you need more information when servicing such instruments Thefollowing paragraphs briefly describe the various service support services and aids available to you to help you maintain your 373XXA 373XXA MM GENERAL INFORMATION SERVICE SUPPORT Technical Support 373XXA MM Field Service Kits Service Software Technical service support is available by contacting any ANRITSU Worldwide Service Center refer to paragraph 1 11 Or service support may be obtained directly from the factory by contacting ANRITSU Company ATTN Customer Service 490 J arvis Drive Morgan Hill CA 95037 2809 Telephone 408 778 2000 FAX 408 778 0239 If servicing or repairing your own system and you need technical sup port you will need to FAX or mail a printout of the items listed below tothe ANRITSU Customer Support E ngineer Measurement data in question Operational Tests results System state from UTILITY menu Service Log from DIAGNOSTICS menu The field service kit listed below is available through your local ANRITSU Sales or Service Center ND37200A 2 Field Service Kit This kit provides for automated field test and performance verification of the 373XXA It is packaged in a hardened rolling case that also has space for two user supplied verification and calibration kits and other accessories
54. perform the AL C calibration paragraph 6 3 before doing this calibration Procedure Step 1 Connect a V Throughline 3670V50 2 with FF Adapter be tween Ports 1 and 2 Step 2 Set the 373XXA to sweep from 50 to 65 GHz Step 3 Set RF power to 0 dB default value Step 4 Using Diagnostics menu view Non Ratio parameters Step 5 View Channel 1 Ref A only and activate Autoscale Step 6 Adjust the RA potentiometer on top of A8 for the flattest trace display A small discontinuity at 56 GHz is normal Step 7 Perform Step 6 for each of the four Non Ratio channels After the calibration process is completed perform the following ac tions as appropriate If calibration passes Savethe calibration data to hard disk as follows 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 HAN CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW CAL SLT 6 13 21 2 ADJUSTMENT 37397A ADJUSTMENTS NOTE Also save the calibration data to floppy disk for archival purposes as a backup in case of a hard disk failure Label the disk with cali bration type date and system model and se rial numbers Set the copy protect tab on the disk Properly safeguard the disk so that it will be available for later use as needed If calibration fails Q Repeat the calibration If it still fails then proceed to Chapter 5
55. step is necessary before any of the module nents can be removed replaced Procedure Step 1 Placethe373XXA on its top bottom side up Step 2 At J 2 on the motherboard PCB disconnect the Floppy Con trol ribbon cable that goes to the floppy drive Dress the ribbon cable away from the Signal Source Module output connector see Figure 8 11 Step 3 Disconnect the semi rigid coaxial line W87 from the out put connector of the Signal Source M odule Step 4 Placethe373XXA in normal top side up position 373XXA MM 8 29 SIGNAL SOURCE MODULES 8 30 Step 5 Step 6 Step 7 Step 8 Step 9 REMOVE AND REPLACE Disconnect the cables from connectors 1 and J 2 of the A21A2 Source Control PCB Pull up gently to disconnect Note that the connector end of each cable is marked with the associated A21A2 connector number Disconnect the cable from connector J 3 of the 21 2 Source Control PCB Dress cables away from the Signal Source Module Remove the three screws that fasten the Signal Source Module to the chassis side rail See Figure 8 15 Loosen the two captive screws that fasten the Signal Source Module to the chassis Figure 8 15 Pull up at the rear of the Signal Source Module to discon nect the 21 1 Source YIG Bias Control PCB from the 17 Motherboard PCB Lift the module from the chassis and place on work surface replace the Signal Source Module perform the steps above in
56. t CH3 S21 FWD TRANS POWER OUT PHASE gt REF 15 000 dBm REF 5 00 1 000 dB DIV CW MODE 2 00 DIV 12 00 dBm 5 00000000 GHz CW 8 00 dBm Shows Power Out and Phase performance as func tion of Input Power at a CW frequency HIGH SPEED TIME DISTANCE DOMAIN MEASUREMENT CAPABILITY OPTION 2 Option 2 High Speed Time Distance Domain software al lows the conversion of reflection or transmission measure ments from the frequency domain to the time domain Measured S parameter data is converted to the time do main by application of a Fast Fourier Transform FFT us ing the Chirp Z Transform technique Prior to conversion any one of several selectable windowing functions may be applied Once the data is converted to the time domain a gating function may be applied to select the data of inter est The processed data may then be displayed in the time domain with display start and stop times selected by the user or in the distance domain with display start and stop distance selected by the user The data may also be con verted back to the frequency domain with a time gate to view the frequency response of the gated data Lowpass Mode This mode displays a response equiva lent to the classic TDR Time Domain Reflectometer re sponse of the device under test Lowpass response may be displayed in either the impulse or step m
57. the rear panel Please usethis identification number during any correspondence with ANRITSU Customer Service about this instrument This manual is available on CD ROM as an Adobe Acrobat pdf file The file can be viewed using Acrobat Reader a free program that is also available on the CD ROM This fileis linked such that the viewer can choose a topic to view from the displayed bookmark list and jump to the manual page on which the topic resides The text can also be word searched Contact ANRITSU Customer Service for price and availability SYSTEM DESCRIPTION GENERAL INFORMATION 1 5 SYSTEM DESCRIPTION The 373XXA Analyzers are microprocessor controlled Vector Network Analyzers Each is a single instrument system that contains a built in 373XXA Model Frequencies signal source a test set and an analyzer subsystem A typical model 37369A is shown in Figure 1 1 These analyzers are produced in five models that cover a range of from 22 5 MHz to 65 GHz The table at left 37317A 22 5 MHz to 8 6 GHz lists the frequencies for each model 37325A 40 0 MHz to 13 5 GHz 37347A 40 0 MHz to 20 0 GHz 37369A 40 0 MHz to 40 0 GHz 37397A 40 0 MHz to 65 0 GHz Model Freq Range 1 6 RELATED MANUALS 373XXA Vector Network Analyzer Operation Manual 10410 00183 describes the front panel operation for all 373XXA models It also con tains general information specifications and Performance Verification procedures for
58. variation in a 1 kHz IF bandwidth up to 20 GHz 0 08 dB and 1 0 peak to peak variation up to 40 GHz 0 25 dB and 2 5 peak to peak variation up to 65 GHz Measurement Throughput Measurement times are based on a single 40 MHz to 20 GHz sweep with 10 kHz IF bandwidth no averages after a full 12 term calibration Sweep times include retrace and bandswitch times Measurement Time ms vs Data Points typical Max Noise Receiver Port 1 System Fred Signal Into p Dynamic Power Dy GHz Port 2 dBm Range dBm namic dBm Range 0 0225 30 95 125 0 95 37317 2 30 98 130 0 98 8 6 30 98 130 0 98 0 04 30 65 100 5 70 37325 2 30 93 128 5 98 13 5 30 93 128 5 98 0 04 30 65 100 5 70 37347 2 30 93 128 5 98 20 30 91 126 5 96 0 04 30 65 100 5 58 37369 2 30 93 128 5 86 20 30 90 125 0 83 40 30 83 123 7 76 37397 0 04 30 77 107 10 70 2 30 105 135 10 98 20 30 97 127 2 90 40 30 95 125 7 88 50 30 87 117 2 80 65 30 77 107 2 70 373XXA Calibration Data Points Type 3 51 101 401 1601 1 3 60 250 330 960 3300 Full 2 Port 60 270 400 1000 3600 Measurement Time vs Sweep Mode for 101 Data Points typical Sweep Mode Time ms Linear 350 List 350 CW 230 Measurement Time vs
59. when cor rection is turned on Also cannot do this when group delay is the graph type on the active channel Low Pass mode requires a har monic sweep Perform a TD harmonic sweep calibration prior to using this mnemonic Receiver out of range by equa tion Problems with the internal source external source or receiver equations in multiple source mode New start less than previous stop An attempt was made to set the start frequency for the new multiple source mode band definition to a frequency less than the stop frequency of the previous band B 11 373XXA MM SERVICE LOG ERROR MESSAGES APPENDIX B Table 3 GPIB Related Error Messages 5 of 8 Error Message Description Bad filename The supplied filename was bad The filename can have 8 characters maximum No extensions The filename must start with and alpha type character A thru 2 After that the allowable characters are alpha numeric 0 thru 9 and underscore _ Conflict with rotary knob You should not be using the rotary knob and the GPIB at the same time Too many data points for exter nal source A6700B series external source can handle 501 data points A 68000 series external source can handle 999 data points Recalled setup corrupted Hardware mismatch in recalled setup Software mismatch in recalled setup These are problems with the recalled setup Too many data points for Dis crete Fill The ma
60. 0 mVpp J4 4 10 18 10 0 100 mVpp J4 4 12 27 5 0 100 mVpp J4 4 14 27 5 0 100 mVpp 372XXA A17 Motherboard 038517 3 3 INGENUUS shown upside down pas WANA AI Figure 5 1 Location of Connectors for Power Supply Voltage Checks 373XXA MM 5 5 5 6 Power Supply Module Check SYSTEM DOES NOT POWER UP TROUBLESHOOTING Step 5 Connect the common lead of the oscilloscope to J 13 pin 8 Measure the Power Supply Sync signal PS SYNC on J 13 pin 14 Specification 2 4 vpp Sine Wave at 109 89 KHz NOTE The power supply module will power up without the PS SYNC signal being present However the lack of this signal will introduce signal purity problems when the sys tem is performing measurements If any of the DC voltage tests fail verify that the power supply module 15 operating properly with minimal impact from the system as described in the procedures below NOTE If a power supply voltage is low it may be due to excessive current draw from the system and not a fault in the power supply Steps 1 through 4 verify the operation of the 9 18 and 27 Vdc supplies Step 1 Press the 373XXA Power key off and and disconnect the power input cord Step 2 Disconnect the power supply module from the A17 Mother board at J 4 Step 3 Reconnect the power line input cord to the system and press the 373XXA Power key on Step
61. 13 1 0 Inter face 1 PCB This PCB assembly terminates the VME bus to insure stable digital data transfer on the bus It plugs into the VME bus structure on the bottom surface of the A17 Motherboard Assembly The assemblies descri bed below are the major assemblies mounted to the basic frame of the 373XXA The motherboard assembly provides signal routing and D C power distribution paths for all major PCB assemblies of the Analog Subsys tem A1 A8 and the Digital Subsystem A9 A16 It also contains the VME Bus Quiet Bus and A D Bus structures and other signal routing paths It does not contain any active components NOTE The motherboard assembly is an integral part of the 373XXA chassis It is not a field replaceable unit The Front Panel Assembly consists of the following assemblies and parts 19 Panel Switch PCB this assembly contains all of the front panel switches for the 373XXA VNA A20Front Panel Control PCB this assembly contains the de code logic for the switches located on the A19 Front Panel Switch PCB This PCB interfaces with the A14 1 I nterface 2 PCB As sembly Front Panel LEDs beeper keys controls and connectors Front panel overlay 373XXA MM SYSTEM DESCRIPTION MAIN CHASSIS ASSEMBLIES Q Front panel casting NOTE The front panel is an integrated assembly that is replace able only as a single unit Rear Panel Assembly Rear Panel Assembly include
62. 2 Reference Timebase that is the master timebase for the system It also contains the signal distribution and switching func tions for all External Internal 10 MHz reference signals The A7 PCB provides the fixed 2 42 MHz Local Oscillator signal and the 80 kHz Calibration signal tothe IF PCBS 4 and A6 These signals are derived from the 10 MHz Reference Timebase Units equipped with Option 10 or 10A have a high stability ovenized timebase mounted inside the rear panel directly above the Power Sup ply Module This timebase replaces the standard 10 MHz timebase lo cated on the A7 PCB The output from this timebase is routed to the A7 for distribution It is powered by regulated 24 vdc from the A7 PCB 373XXA MM 7 9 ANALOG SUBSYSTEM ASSEMBLIES SYSTEM DESCRIPTION Receiver Module TheReceiver Module consists of the items listed below refer to Fig ure 7 2 Q Quad Sampler Buffer Amplifier with integrated SRD step recov ery diode Power Amplifier 1 LO1PCB a A2 LO2 PCB The Receiver Moduleis a four channel two stage Sampler Buffer Am plifier and Down Conversion unit It simultaneously converts the four 22 5 MHz 40 GHz signals from the Test Set Module into three 2 5 MHz IF signals that are output to the IF Section The first stage of the Receiver Module uses harmonic sampling to down convert the four 22 5 MHz 40 GHz output signals from the Test Set Module down to 89 MHz signals Any input si
63. 2 dB 2 7W Blackman Harris 4 1 W Bin Width 1 2Af sweep width Example When Af 40 MHz to 40 GHz W 12 5 ps When Af 40 MHz to 65 GHz W 7 7 ps Gating selective gating function may be applied to the time domain data to remove unwanted responses either in a pass band or reject band mask This gating function may be chosen as the convolution of any of the above win dow types with a rectangular gate of user defined position and width The gate may be specified by entering start and stop times or center and span The gated data may be dis played in the time domain or converted back to the fre quency domain Time Domain Display Data processed to time domain may be displayed as a function of time or as a function of distance provided the dielectric constant of the transmis sion media is entered correctly In the case of dispersive media such as waveguide or microstrip the true distance to a discontinuity is displayed in the distance mode The time display may be set to any arbitrary range by specify ing either the start and stop times or the center time and span The unaliased non repeating time range is given by the formula _ Number of Frequency Data Points Frequency Sweep Range GHZ UnaliasiedRange ns The resolution is given by the formula Lobe Width null null in ns KW Freq Sweep Range GHz 373XXA MM APPENDIX Where kW is two times the number of window terms for
64. 3 If fails replace the A16 Hard Disk PCB reinstall system software from the master floppy diskettes Step 4 Retry boot up If fail contact ANRITSU Customer Service Center Floppy Disk Problems If a floppy disk problem is indicated during bootup from floppy disk but the system is ableto bootup from the hard disk Step 1 Ensurethe floppy disk media is in good condition Step 2 Verify disk drive connection at Motherboard connector J 2 Step 3 Retry boot up If fail replace the A13 1 0 PCB 373XXA MM 5 9 SYSTEM HAS ERROR CODE Screen Display Problems Check 1 Check 2 5 6 SYSTEM HAS ERROR 5 10 CODE TROUBLESHOOTING Step 4 Retry boot up If fail replace the Floppy Disk Drive If the 373XXA system appears to have no screen display perform the preliminary check below and then perform checks 1 3 as appropriate Preliminary Check Press the 373XXA Power key off and then on sev eral times Each time power is reapplied pause and wait for the 373XXA software system to boot up During boot up observe the top left hand portion of the CRT display NOTE An alternative method to reset and re boot the software system is to press the red button on the A9 Main Processor PCB Observe the messages displayed on the screen dur ing the boot up process Verify that the following messages are present Initializing front panel knob 14 20 Initializing GPIB A13 A18 Initializing external keybo
65. 7900 ee Sue eh B 4 8000 8999 INR Go Aisin tah Yate fa iet Gaye a bah GD B 4 373XXA MM Appendix Connector Maintenance Check Procedures C 1 INTRODUCTION E tone Va ate 3 2 PRECAUTIONS 3 Pin Depth Problems s ett es Pin Depth Tolerance ej Rp manis E E el Ua usce tal na C 4 Avoid Over Torquing Connectors ts 4 Teflon Tuning Washers s tt ee 4 Avoid Mechanical Shock s o o o n n n n C 4 Keep Connectors Clean MIO C 4 Visual Inspection n t n n n e e e nn C 5 C 3 REPAIR MAINTENANGCE sem et ee ae 5 Appendix Performance Specifications Appendix D Performance Specifications Appendix E Performance Verification Software User s Guide Subject Index 373 XXA MM ix x Chapter 1 General Information Table of Contents 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 SCOPE OF MANUAL CTI 1 3 INTRODUCTION amp E En qp qr R RI NT C 1 3 IDENTIFICATION NUMBER sss teeters 1 3 ONLINE MANUAL wn ur how cals GER Sree Gee Soa a Sa 1 3 SYSTEM DESCRIPTION pr 1 4 RELATED MANUALS E ES 4 X IR dar CRI
66. 8 PERFORMANCE SPECIFICATIONS 1 9 SERVICE CENTERS Wi Uy a tay a ay cw tae a at gc i 1 9 STATIC SENSITIVE COMPONENT HANDLING PROCEDU RES ss see 1 9 RECOMMENDED TEST EQUIPMENT ccc nr nns 1 9 iii Chapter 2 Replaceable Parts 2 1 2 2 2 3 2 4 INTRODUCTION M I E EXCHANGE ASSEMBLY PROGRAM REPLACEABLE SUBASSEMBLIES AND PARTS PARTS ORDERING INFORMATION gt lt nn zn Chapter 3 Operational Tests 3 1 3 2 3 3 3 4 3 5 INTRODUCTION ae die le eS ed GIS CHECKING THE SERVICE LOG etre n n n n n SELBE TEST de Lar ak eat tee ea Oris dic PERIPHERALS AND INTERFACES 2 22 LCD Test 3 so Front Panel Test External Keyboard InterfaceTest 33727 Pri nter nterface Test o o o on gt ggg gg gg gt gt t lt ttn GPI BI nterface Test s so a SI GNAL 2 0 Chapter 4 Performance Verification 4 1 4 2 4 5 INTRODUCTION ssl CALIBRATION AND MEASUREMENT CONDITIONS MEASUREMENT ACCURACY sss eer n n n n g t8 n8 n Verification Software ifr ass deis apnd ah cmi ERA RR tat ai us teas tau tah de eu Verification Resu
67. AL FAIL 7148 FLOPPY DISK WRITE ERROR 373 MM B 17 SERVICE LOG ERROR MESSAGES Table B 4 Service Log Error Messages 3 of 3 APPENDIX B 7146 FLOPPY DISK CHANGED 7222 PLOTTER OUT OF PAPER 7147 FLOPPY DISK UNAVAILABLE 7223 PLOTTER PEN UP 7169 FLOPPY INIT FAIL 7230 POWER METER NOT RESPONDING 7170 GENERAL HARD DISK FAIL 7240 FRQ COUNTER NOT RESPONDING 7172 HARD DISK READ ERROR 7250 EXT SOURCE NOT RESPONDING 7173 HARD DISK WRITE ERROR 7310 PRINTER NOT RESPONDING 7177 HARD DISK UNAVAILABLE 7311 PRINTER NOT READY 7199 HARD DISK INIT FAIL 7312 PRINTER OUT OF PAPER 7200 IEEE 488 2 GPIB BUS ERROR 7320 AUX I O PORT ERROR 7201 ABORTED MESSAGES 7330 SERIAL PORT ERROR 7202 NOTHING TO SAY 7340 ETHERNET PORT ERROR 7203 NO LISTENER ON BUS 7350 EXT TRIG RATE TOO FAST 7204 GPIB COMMAND ERROR 7410 EXT KYBD ERROR 7205 GPIB EXECUTION ERROR 8100 PWR FAIL 7206 GPIB DEVICE SPECIFIC ERROR 8110 GENERAL VME BUS FAIL 7207 GPIB QUERY ERROR 8120 GENERAL MEMORY FAIL 7210 DEDICATED GPIB BUS ERROR 8121 NON VOLATILE MEMORY FAIL 7220 PLOTTER NOT RESPONDING 8130 PROCESSING FAIL 7221 PLOTTER NOT READY 8140 GENERAL DISK BUFFER ERR 18 373 Appendix Connector Maintenance Check Procedures Table of Contents C 1 INTRODUCTION s s RR C 3 C 2 C 3 PRECAUTIONS tics anii n n RR
68. After the calibration process is completed perform the following ac tions as appropriate 6 3 LO 2 CALIBRATION 6 3 LO 2 CALIBRATION 6 4 Calibration Procedure ADJUSTMENTS If calibration passes Save the calibration data to hard disk as follows 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 CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW_CAL LO1 NOTE Also save the calibration data to floppy disk for archival purposes as a backup in case of a hard disk failure Label the disk with cali bration type date and system model and se rial numbers Set the copy protect tab on the disk Properly safeguard the disk so that it will be available later use as needed If calibration fails Step 1 Repeat the calibration If it still fails then proceed to Chapter 5 Troubleshooting This procedure uses the 373XXA internal diagnostics and calibration menus to adjust the A2 2nd LO PCB assembly Perform this calibation procedure if TheA2PCB is replaced BBRAM chip on A9 Processor PCB is replaced and the LO2 Cali bration data was not previously saved on disk that is data is not available for recall from a floppy disk Perform the following steps Equipment Required None NOTE Allow the 373XXA to warm up at least 30 minutes prior to performing calibration Procedure
69. Assembly RF Microwave Components 37397A Assembly Part Part Number Pinswitch 29855 Switched Doubler Module SDM 47520 Quadrupler SQM 48998 37GHz High Pass Filter 49247 Mux Coupler Port 1 49470 Mux Coupler Port 2 49480 Shaped Pad 52956 Bias Tee 53409 16 8 GHz Lowpass Filter B28912 Access Loops Front and Rear Panel B35569 195 Transfer Switch D27030 3 dB Fixed Attenuator ND26178 Step Attenuator ND52564 Coupler ND52929 Quad Buffer Amplifier Power Amplifier ND53249 2 6 373XXA MM REPLACEABLE PARTS Table 2 5 Miscdlaneous Integrated Assemblies PARTS ORDERING INFORMATION Assembly Part 373XXA Model Option Part Number 10 MHz Ovenized Oscillator Opt 10 only ND39476 Power Supply Module All 40 116 VGA Monitor All 2000 322 Floppy Disk Assy All C38550 Front Panel Assy w Front Panel A19 and A20 PCB s and all Model All ND42700 ID Overlays Fan Assembly Rear Panel All B38533 Front Panel Assy incudes front panel A19 and A20 PCBs and all LCD Equipped ND44606 model ID overlays Power Supply LCD Equipped 40 114 Liquid Crystal Display LCD LCD Equipped 15 88 Liquid Crystal Display LCD LCD Equipped 15 92 SN 972701 and above Liquid Crystal Display LCD LCD Equipped 15 100 SN 994600 and above Table 2 6 Consummsable Parts Assembly Part 373XXA Model Option Part Number System Software A
70. B38509 A13 1 038513 3 14 2 038514 3 15 Graphics Processor D44281 3 A16 Hard Disk w PCB D41041 3 A18 Rear Panel PCB D44255 3 A19 Front Panel Switch PCB See Table 2 5 A20 Front Panel Control PCB A21A1 Source YIG Bias Control p o Signal Source Module D48516 3 A21A1 Source YIG Bias Control p o Signal Source Module D48512 3 A21A2 Source Control p o Signal Source Module D41841 3 A21A2 Source Control p o Signal Source Module D48513 3 A24 VME Bus Terminator D38524 3 Required for 37397A Part of the Front Panel Assembly refer to Table 2 5 373XXA MM 2 5 PARTS ORDERING INFORMATION REPLACEABLE PARTS Table 2 3 Test Se Assembly RF Microwave Components 37317A 37325A 37347A 37369A Assembly Part 373XXA Model Option Part Number Transfer Switch All D28580 1 46535 Step Attenuator 70 dB All 4612K Low Frequency Bridge w Bias Tee 37311A 37317A D28985 Coupler w Bias Tee 37325A and higher D28967 40 GHz Quad Buffer Amp Power Amplifier 37369A only ND47533 Switched Doubler Module SDM 37369A only D28685 Port 2 Step Attenuator All 4612K 6 dB Pad 37369A only 43KC 10 20 dB Pad 37347A and below 43KC 20 20 GHz Quad Buffer Amp Power Amplifier All except 37369A ND47532 Used on serial numbers 975004 975101 975103 980102 980104 980201 980302 980402 980403 980405 980406 980407 980602 980603 980701 and above Table 2 4 Test Se
71. Bias Input BNC nectors to connector P2 on the A18 Rear Panel PCB Dis connect at A18 P2 end A18 P2 is the connector nearest to the bottom lip of the rear panel Step 9 Gently pull front panel assembly several inches away from chassis Locate cable from A17 Motherboard PCB to con nector J 1 on A20 Front Panel PCB Disconnect at A20 1 end Step 10 Separate the bias input cables Step 8 from the cable har nesses as necessary for removal Pull front panel assembly free and set aside Toreplace the front panel assembly perform the steps above in the re verse order This paragraph provides instructions for removing and replacing the internal VGA Display Monitor assembly NOTE It is not necessary to remove the front panel assembly to perform this procedure Preliminary Switch 373XXA power off Remove the power cord Remove all covers paragraph 8 3 Remove Replace Procedure Step 1 Placethe 373XXA on its right side monitor down Step 2 At rear of monitor assembly disconnect The power cord from the Power Supply M odule B cable from motherboard CRT connector 14 B The two cables from motherboard BRITE DEGAUSS connector J 15 373XXA MM REMOVE AND REPLACE VGA DISPLAY MONITOR NOTE All the the cables mentioned above have keyed connectors Step 3 Remove the four screws that fasten the monitor assembly to the chassis See Figure 8 7 Do not unfasten the screw with
72. Boot up Problems n n ne 5 7 Boot up Process Sequence 5 7 Buffer Amplifier Sampler A31 8 27 CALIBRATION AND MEASUREMENT CONDI 5 4 3 des oe ate DD Serra 1 3 CHECKING THE SERVICE 3 4 Connector Maintenance Cleaning 4 INTRODUCTION RE 28 C 3 Mechanical Shock 3 77 C 4 Pin Depth Problems ccs 3 Pin Depth Tolerances 4 Precautions na Cal eee Cat ona Cae a 3 Repair Maintenance 22 5 Teflon Tuning Washer 22 C 4 Torque 4 Visual Inspection lt 5 Consummsable Parts gt 2 6 25 Re 8 4 8 5 CRT Display Test Failures 5 21 Diagnostic Menus INTRODUCTION aA eo Che A 3 Diagnostics Menus H W Hardware Calibrations 5 Installed Options ccc ees 4 Peripheral Tests lt 4 Read Service Log n 6 nnn Start Self Test opc Gas abe ee A 3 Troubleshooting 333 A 4 DIAGNOSTICS MENUS 6 Diagnostics Menus Flowchart 7 DIGITAL SUBSYSTEM ASSEMBLI
73. Chapter 1 Figure 1 2 8 2 EQUIPMENT REQUIRED All procedures in this chapter require the use of either a 1 or 2 size Phillips type screw driver Any additional tool requirements are speci fied at the beginning of each procedure 373 XXA MM 8 3 5 REMOVE AND REPLACE 8 3 COVERS Adjustment and troubleshooting operations require removal of the top cover Replacement of some 373XXA assemblies and parts require re moval of all covers The following procedures describe this process NOTE It is only necessary to loosen the 373XXA handle assem blies to remove the top bottom or side covers However if the front panel is to be removed remove the handle as semblies at this time Preliminary Switch the 373XXA power off Remove the power Procedure Step 1 Step 2 Step 3 Step 4 8 4 Loosen or remove the right and left handle assemblies as follows W Placethe 373XXA on its top bottom side up B Loosen remove the screws at the sides of the handle as semblies f removing handles pull them away from unit and set aside CAUTION The green headed screws have Metric threads To remove the top cover Placethe 373XXA in normal top side up position Remove the feet from the two top corners at the rear of the 373XXAB Figure 7 1 Remove the center screw from rear of the top cover W Lift and slide the top cover away from the 373XXA To remove the bottom cover
74. Drive Assembly Mounting Plate Screws E 09 7 87 0 8 a ae a 8 18 Location of Internal LCD Assembly Mounting Screws E 8 16 Location of Internal VGA Monitor Assembly Mounting Screws ceca ne ra ooa 8 15 Location of Mounting Screws for Rear Panel As semblies o o n n n n n a 8 19 Location of SRAM Battery on the A9 PCB 8 11 Location of the A24 VME Bus Terminator PCB Assembly A edo as do di iE RE LO 8 12 M MAIN CHASSIS ASSEMBLIES 7 16 7 19 Major Assemblies Location Diagram Bottom View Not 37397 2 8 2 9 Major Assemblies Location Diagram Top 5555 2 7 MANUAL SCOPE eel SP qax da erode F 1 3 MEASUREMENT ACCURACY 4 4 Measurement Conditions Check List 5 23 Measurement Environment Considerations 4 6 MEASUREMENT IN QUESTION 5 22 5 24 Measurement Technique 4 7 Miscellaneous Integrated Assemblies 2 6 ONLINE MANUAL a inl van Ataf 1 3 Operational Error Messages B 3 OPERATIONAL ERROR MESSAGES B 3 Overall Block Digram of 373XXA VNA System 7 5 P PARTS ORDERING INFORMATION 2 4 2 10 Performance Specifications D 1 1 1 372XXB MM INDEX PERFORMANCE SPECIFICATIONS 1 9
75. E The 373XXA has extensive built in troubleshooting tools that are useful for troubleshooting the failures listed in Table 5 5 These and other troubleshooting tools are ac cessed from the Option Menu key which is part of the en hancement keygroup From the select OPTIONS menu select DIAGNOSTICS then select TROUBLE SHOOTING Refer to Appendix A Troubleshooting tools that are available from the TROUBLE SHOOTING menu that are useful for locating faults occurring in the Source Module Test Set Module and Receiver Module are NOTE The troubleshooting tools listed below are used to test the 373XXA to factory set limits when the ANRITSU 37300A Test Software 2300 178 is run When run from the TROUBLESHOOTING menu nct all tests will display limit lines as is the case when the 37300A Test Software 2300 178 is used NON RATIO PARAMETERS This function displays the output of each of the individual test set channels It is especially useful for verifying the performance of the Buffer Amplifier and Power Amplifier NOTE A through line cable connecting Port 1 and Port 2 is re quired for this check 373XXA MM TROUBLESHOOTING Isolation Procedures 373XXA MM Check 1 SOURCE TEST SET RECEIVER By examining these displays in conjunction with other failure symp toms the failed assembly can be located Example Suppose the Non Ratio Parameter screen display shows power holes above 270 MHz on all traces and in both
76. EB AT NS DISK OPERATIONS FOR SERVICE SAVE ONLY TO HARD DISK 101 CALIBRATION TO FLOPPY DISK 102 RECALL CALIBRATION FROM HARD DISK RECALL SECON FROM FLOPPY DISK DELETE DALIBERTION FROM HARD DISK DELETE DISK OPERATIONS FROM FLOPPY DISK FREUE MENU COPY FROM HARD PRESS ENTER TO FLOPPY DISK SELECT COPY FROM FLOPPY TO HARD DISK PREVIOUS MENU PRESS ENTER TO SELECT A9 PCB BBRAM CHIP NOTE If unableto recall calibrations from disk you must redo the calibration data described in the Preliminary step on the preceeding page Step 3 Ensurethe system sweeps several times without errors Step 4 Refer to Chapter 3 Operational Tests Perform the follow ing Check the Service Log for any new errors Note that the service log is non volatile it may contain error entries from a previous problem or service operation m Run the Self Test procedure W Refer to Chapter 5 Troubleshooting if any system errors are reported BBRAM Chip Figure 8 3 Location of BBRAM Chip on the A9 PCB 9 5 8 6 9 PCB SRAM BATTERY 8 10 REMOVE AND REPLACE This paragraph provides instructions for removing and replacing the SRAM Battery located on the A9 Main Processor PCB assembly Preliminary Switch the 373XXA power off Remove the power cord CAUTION The SRAM battery incorporates flammable materials such as lithium an
77. EL OR SAVE AND CAL DATA FRONT PANEL SAVE SETUP IN RECALL INTERNAL MEMORY FRONT PANEL PRESS lt ENTER gt TO PA AND SELECTFUNCTION ON HARD DISK FRONT PANEL SETUP AND ON DISK PANEL SETUP TO PRESS lt ENTER gt INTERNAL MEMORY TO SELECT MEMORY 1 MEMORY 2 MEMORY 3 MEMORY 4 MEMORY 5 MEMORY 6 MEMORY 7 MEMORY 8 MEMORY 9 MEMORY 10 PREVIOUS MENU PRESS lt ENTER gt TO SELECT OR USE KEYPAD ORNL RECALL FRONT PANEL OR SAVE AND CAL DATA FRONT PANEL ae INTERNAL MEMORY RECALL FRONT PANEL PRESS lt ENTER gt TETONS TO SELECT FUNCTION ON HARD DISK FRONT PANEL CE IE AND SAVE FRONT ON FLOPPY DISK PANEL SETUP TO INTERNAL MEMORY PRESS ENTER MEMORY 1 TO SELECT MEMORY 2 MEMORY 3 MEMORY 4 MEMORY 5 MEMORY 6 MEMORY 7 MEMORY 8 MEMORY 9 MEMORY 10 373XXA MM Step 4 Step 5 Step 6 Step 7 Step 8 9 PCB SRAM BATTERY Check the Service Log for any new errors Note that the service log is non volatile it may contain error entries from a previous problem or service operation Run the Self Test procedure Refer to Chapter 5 Troubleshooting if any system errors are reported Use front panel keys to set to Dual Channel Display 1 amp 3 Save front panel setup to memory as follows W Press the Save Recall Menu key Select SAVE from menu top left then in sequence se lect FRONT PANEL SETUP IN INTERNAL MEMORY MEMORY 1 Reset system to default settings by pressing the Default k
78. ES 7 13 7 15 DigitalSubsystem Block Diagram 7 14 DISK RELATED ERROR MESSAGES B 3 Down Converter Assembly 8 33 Index 3 E Electro static discharge procedures 1 9 EQUIPMENT REQUIRED ccc 8 3 Error Code DE Lock Failure Troubleshooting 5 14 Error Codes Wis m ac a as a 5 10 Error Messages Disk Related NE kee ace fay 3 Disk Related Error Messages B 3 GPI B Related iris Gd esa 8 ar ere B 3 INTRODUCTION GDh mw Wo c r We 3 Operational Error Messages B 3 Service Log sss ttt es B 3 EXCHANGE ASSEMBLY PROGRAM 2 3 Exploded View of 372XXB Chassis Covers 8 5 External Keyboard Interface Test 3 7 Factory Repairable Non Exchange Parts 2 6 Failed Assembly Exchange Program 1 8 FAN ASSEMBLY 9 22 ae eet chee Far 8 21 Field Service Kits 33227 1 7 FLOPPY DISK DRIVE 8 17 8 18 Floppy Disk Drive Assembly 7 16 Floppy Disk Problems 5 9 FREQUENCY CALIBRATION 6 5 6 7 Front Panel Assembly 7 16 FRONT PANEL ASSEMBLY 8 12 8 13 Front Panel Te
79. FLOPPY DISK CNTRL FAIL 2136 SRC ALC CAL BND10 FAIL 1411 14 VME BUS INTERFACE FAIL 2137 SRC 1 FM PATH TUNE FAIL 1511 15 VME BUS INTERFACE FAIL 2138 SRC A2 FM PATH TUNE FAIL 1512 VRAM CHECK FAIL 4100 LO1 CAL FAIL 1611 HARD DISK CONTROL FAIL 4200 LO2 CAL FAIL 1811 AUXILLARY IO FAIL 4301 SRC FREQ CAL MEAS UNSTABLE 1912 FRONT PANEL CNTRL FAIL 4302 SRC FREQ FM MAIN CAL FAIL 1913 ROTARY KNOB FAIL 4303 SRC FREQ FM SENS CAL FAIL 2111 SRC COMM FAIL 4304 SRC FREQ CAL VERIFY FAIL 2112 SRC FTUNE DAC FAIL 4401 SRC ALC LOG AMP CAL FAIL 2113 SRC STATE MACHINE DAC FAIL 4402 SRC ALC CAL VERIFY FAIL 2114 SRC FM CAL FAIL 4500 IF CAL FAIL 2115 SRC F TUNE PATH BND1 FAIL 4600 GAIN RANGING ERROR 2116 SRC F TUNE PATH BND2 FAIL 4700 STATE MACHINE FAIL 2117 SRC F TUNE PATH FAIL 5110 RF PWR UNLEVELED 2118 SRC F TUNE PATH BND4 FAIL 5210 REF A CHAN RF OVERLOAD 2119 SRC F TUNE PATH BND5 FAIL 5220 REF B CHAN RF OVERLOAD 2120 SRC F TUNE PATH BND6 FAIL 5230 TA CHAN RF OVERLOAD 2121 SRC F TUNE PATH BND7 FAIL 5240 TB CHAN RF OVERLOAD 2122 SRC F TUNE PATH BNDS8 FAIL 6001 6128 PHASE LOCK FAILURE 2123 SRC F TUNE PATH BND9 FAIL 7100 FILE MARKED READ ONLY 2124 SRC F TUNE PATH BND10 FAIL 7140 GENERAL FLOPPY DRIVE FAIL 2125 SRC PWR LEVEL DAC FAIL 7142 FLOPPY DISK READ ERROR 2126 SRC DETECTOR ZERO C
80. Follow the directions displayed on the screen to set up and connect the power meter tothe 373XXA Refer alsotoFig ure 6 2 Select START ALC CALIBRATION from menu Step 4 Follow the directions displayed on the 373XXA CRT screen until calibration is completed Step 5 If the software allows a Port 2 ALC Calibration perform it now Post Calibration After the calibration process is completed perform the following Actions tions as appropriate 373XXA MM ADJUSTMENTS SOURCE LOCK THRESHOLD If calibration passes Save the calibration data to hard disk as follows 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 CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW CAL ALC NOTE Also save the calibration data to floppy disk for archival purposes as a backup in case of a hard disk failure Label the disk with cali bration type AL C date and system model and serial numbers Set the copy protect tab on the disk Properly safeguard the disk so that it will be available for later use as needed Perform the RF Power Generation and Control test in Chapter 3 Op erational Tests If thetest fails proceed to Chapter 5 Troubleshooting If calibration fails Verify the GPIB cable 15 connected to the Dedicated GPIB bot tom connector on the 373XXA rear panel Verify that the power meter and sensor ar
81. IFICATION MANUFACTURER MODEL Computer C ontroller PC with Windows 95 or later and National In Any O P Test Software ANRITSU 2300 178 O Floppy Disk Formatted IBM PC format DS HD 1 44 Mbyte A GPIB Cable ANRITSU 2100 2 or equivalent O P A RF Microwave Cable DC 40 GHz K type connectors male Any female Length 3 ft BNC Cable Length 4 ft 2 each Any Printer Port Test ANRITSU B39553 Fixture Thru Line For models 37317A and below ANRITSU 3670A50 2 3671A50 2 For models 37325A and above ANRITSU 3670K50 2 3671K50 2 Calibration Kit For models 37317A and below with Opt 7A ANRITSU 3651 1 For models 37317A and below with Opt 7N or ANRITSU 3653 7NF For models 37325A and above ANRITSU 3652 1 For models 37325A and below with Opt 7S ANRITSU 3650 1 For model 37397A ANRITSU 3654B Performance Verifica ANRITSU 2300 237 P tion Software Connector Verification For models 37217B and below w Opt 7A ANRITSU 3667 P Kit For models 37217B and below with Opt 7N or 7NF For models 37225B and above For models 37247B and below with Opt 7S For model 37397A ANRITSU 3663 ANRITSU 3668 ANRITSU 3666 ANRITSU 3669B Calibration Kit sliding load Option 1 required for Performance Verification only USE CODES Quo Adjustment Internal Hardware Calibration Operational Testing Performance Verification Troubleshooting 1 10 373XXA
82. IS ASSEMBLIES SYSTEM DESCRIPTION Power Supply Module Power Supply Moduleis a single self contained assembly mounted on the rear panel This module provides Unregulated 5 9 18 27 Vdc supply voltages to the other assemblies of the 372XXB Dedicated AC line connection for the Internal VGA Monitor Thermal and over current shutdown protection circuitry Sensing and input power regulation for operation with 85 264 48 63 Hz universal AC line input power Internal fan cooling for power supply module Supply voltages distribution Table 7 1 identifies all 372XXB DC power supply voltages and lists their usage by the various PCB assemblies Unless otherwise indi cated supply voltages are regulated on the assembly using them The analog and digital power supply grounds are isolated NOTE power supply voltages listed in Table 7 1 can be cessed via the A D bus for measurement by thethe A D converter circuitry e g DVM located on the A5 A D PCB assembly Table 7 1 372XXB Power Supply Voltages and Usages Voltage Assemblies Where Used 45V 1 2 4 5 6 7 A9 A13 A14 A15 A16 A18 19 20 Front Panel 21 1 21 2 P O Source 24 External Keyboard 9V 1 2 A7 8 18V 1 2 4 5 6 7 8 A13 18V 1 2 4 5 6 7 8 A13 27V 1 2 5 7
83. L 0614 TB PHS CONTROL FAIL 0218 OFFST PHS LCK IND FAIL 0711 LO3 COMM FAIL 0219 DDS PHS LCK IND FAIL 0712 LO3 REF OSC FAIL 0220 LO2 LCK TIME FAIL 0713 LO3 48 4 LCK IND FAIL 0221 LO2 SRC TRACKING FAIL 0714 LO3 48 4 LCK ERR VOL FAIL 0311 TA IF COMM FAIL 0715 LO3 CAL REF PHS FAIL 0312 TAIF 10V REF FAIL 0811 SL SIG SEP COMM FAIL 0313 TA IF LEVEL STATUS FAIL 0812 DAC ADJUSTMENT FAIL 0314 TA PHS CONTROL FAIL 0813 TRANSFER SWITCH CNTRL FAIL 0411 REF IF COMM FAIL 0814 SRC LCK POL CONTROL FAIL 0412 REF IF 10V REF FAIL 0815 DIRECT MODE ATTEN FAIL 0413 REF IF LEV STATUS FAIL 0911 A9 VME BUS INTERFACE FAIL 0414 REF PHS CONTROL FAIL 0912 BBRAM CHECK FAIL 0500 A TO D CONVERSION FAIL 0918 SRAM CHECK FAIL B 16 373 MM APPENDIX B Table B 4 Service Log Error Messages 2 of 3 SERVICE LOG ERROR MESSAGES 0914 SCSI DEVICE FAIL 2127 SRC ALC CAL BND1 FAIL 0915 MCCHIP FAIL 2128 SRC ALC CAL BND2 FAIL 0915 MCCHIP TIMER 1 FAIL 2129 SRC ALC CAL BND3 FAIL 0916 MCCHIP TIMER 2 FAIL 2130 SRC ALC CAL BND4 FAIL 0917 MCCHIP TIMER 3 FAIL 2131 SRC ALC CAL BND5 FAIL 0918 MCCHIP TIMER 4 FAIL 2132 SRC ALC CAL BND6 FAIL 0919 CLOCK NOT RUNNING 2133 SRC ALC CAL BND7 FAIL 1311 A18 VME BUS INTERFACE FAIL 2134 SRC ALC CAL BND8 FAIL 1312 EXT KEYBD CNTRL FAIL 2135 SRC ALC CAL BND9 FAIL 1313
84. L 1 kHz REDUCED 100 Hz and MINIMUM 10 Hz Trace Smoothing Functions similarly to Data Averaging but computes an average over a percentage range of the data trace The percentage of trace to be smoothed can be selected from 0 to 20 of trace Front panel button turns smoothing on off and front panel LED indicates when smoothing is active SOURCE CONTROL Frequency Resolution 1 kHz 1 Hz standard on RF units and optional on Microwave units Option 10A Source Power Level The source power dBm may be set from the 373XXA front panel menu or via GPIB Refer to Level Control Range table on next page In addition the port 1 power may be attenuated in 10 dB steps using the internal 70 dB 60 dB for 37397A step at tenuator Similarly high input signals into port 2 not ex ceeding 1 watt can be attenuated up to 40 dB using the internal port 2 step attenuator Power Accuracy 0 5 dB at 2 GHz at default power Power Meter Correction The 373XXA offers a user selectable feature that corrects for test port power variations and slope on Port 1 using an external Hewle tt Packard 437B or Anritsu ML8403 power meter Power meter correction is available at a user selectable power level if it is within the power adjustment range of the inter nal source Once the test port power has been flattened its level may be changed within the remaining power justment range of the signal source Set On Receiver Mode The 373XXA can be confi
85. M and Control PCB IF Section ANALOG SUBSYSTEM ASSEMBLIES The Source Lock Phase Comparator circuit on the A8 Source Lock Signal Separation Control PCB compares the Source Lock Reference A B signal from the Receiver Module with a signal derived from the10 MHz refer ence oscillator The output of this circuit is the 6 MH2 V correction sig nal which is routed tothe circuit on the A21A2 Source Control PCB that generates the FM coil tuning current signal This signal is output tothe A21A1 YIG Bias Controller PCB to fine tune the YI G tuned osallator to the exact output frequency When the Y G tuned oscillator outputs the exact frequency the two inputs to the phase comparator circuit on the A8 PCB match and the phase lock loop is locked The A8 PCB Assembly also provides bias and control signals to the Test Set and Receiver Modules for operating the following circuits Transfer Switch Power Amplifier Quad Sampler Buffer Amplifier Front Panel F orward Reverse LEDs ThelF Section consists of the items listed below refer to Figure 7 2 Q A3Test AIF PCB Reference IF A5 A D Converter PCB A6 Test B IF PCB A7 Third Local Oscillator LO3 PCB m m m m The IF Section converts the three 2 5 MHz IF signals from the Re ceiver Module into six DC output signals The A3 Test A A4 Refer ence A B and Test B PCBs down convert the 2 5 MHz input IF signals to 80 kHz IF signals an
86. MM GENERAL INFORMATION Table 1 1 Recommended Test Equipment 2 of 2 RECOMMENDED TEST EQUIPMENT K Connector Gauging Set ANRITSU 01 162 CRITICAL RECOMMENDED USE INSTRUMENT SPECIFICATION MANUFACTURER MODEL Assurance Air Line For models 37317A and below w Opt 7A ANRITSU 18A50 P For models 37317A and below w Opt 7N ANRITSU 18NF50 For models 37317A and below w Opt 7NF ANRITSU 18N50 For models 37317A and above ANRITSU T1519 For models 37317A and below w Opt 75 ANRITSU T1147 2 Offset Termination For models 37317A and below w Opt 7A 7N ANRITSU 29450 20 P 7NF All other models ANRITSU 29KF50 15 Frequency Counter Frequency 0 1 to 26 5 GHz EIP Microwave Inc Model 578B PA Input Impedance 500 Digital Multimeter Resolution 4 digits Any T DC Accuracy 0 1 96 AC Accuracy 0 1 96 Oscilloscope Bandwidth DC to 100 MHz Tektronix Inc T Sensitivity 2 mV Model 2445 Horiz Sensitivity 50 ns division Power Meter 1 with Power Range 30 to 20 dBm HP 437B with Option 22 GPIB PRA 1 mW to 100 mW Other GPIB controllable Power Sensor 1 Frequency Range 0 05 to 50 GHz HP 8487 PRA or Power Range 70 to 47 dBm 100 pW to 50 W Gigatronics 8541 or 8542 Power Meter 2 with Other GPIB controllable Gigatronics 80304A Power Sensor 2 Frequency Range 0 01 to 40 GHz Power Meter and Power Frequency Range to 65 GHz Anritsu Model ML24xxA Power Meter P A Sensor and MA2474A 40 GHz and b
87. MODEL 373XXA VECTOR NETWORK ANALYZER MAINTENANCE MANUAL Application Information Pricing available at 1 WE TestWorld 250 Technology Way sales testworld com Rocklin CA 95765 1 855 200 TEST 8378 Click to go www TestWorld com m Anritsu 490 JARVIS DRIVE MORGAN HILL CA 95037 2809 P N 10410 00185 REVISION D PRINTED MARCH 2000 COPYRIGHT 1996 ANRITSU CO WARRANTY TheANRITSU product s listed on the title pageis are warranted against defects in materials and workmanship for one year from the date of shipment ANRITSU s obligation covers repairing or replacing products which prove to be defective during the warranty period Buyers shall prepay transportation charges for equipment returned to ANRITSU for warranty repairs Obligation is limited to the original purchaser ANRITSU is not liable for con sequential damages LIMITATION OF WARRANTY The foregoing warranty does not apply to ANRITSU connectors that have failed due to normal wear Also the warranty does not apply to defects resulting from improper or inadequate maintenance by the Buyer unauthorized modification or misuse or operation outside of the environmental specifi cations of the product No other warranty is expressed or implied and the remedies provided herein are the Buyer s sole and exclusive remedies TRADEMARK ACKNOWLEDGEMENTS V Connector and K Connector are registered trademarks of ANRITSU Comp
88. Major Assemblies Location Diagram 3 View PARTS ORDERING INFORMATION REPLACEABLE PARTS Porti Switched Doubler Port 2 Step Port2 Coupler Bridge Module Attenuator Coupler Bridge m peru PIA Floppy Disk Drive T Assembly a lal Telo o Step Attenuator MH 70dB 5 2 y l o 0 _ M Switch Sy ee rs 17 Motherboard Power NO PCB Assembly Amplifier a gt i o 9 24 VME Bus D m Terminator 20 40 GHz No of d lj PCB Assembly Quad Buffer qui 2 ir Z f pi Amp Sampler A Mo ed bs Ed ld bd h O j o Refer to Table 2 3 10dB 20dB Pads A18 Rear Panel Model 37369A Only PCB Assembly Figure 2 2 Major Assemblies Location Diagram Bottom View Not 37397A 2 10 373XXA MM REPLACEABLE PARTS Port 1 Bias Tee Port 1 Coupler A PARTS ORDERING INFORMATION Port 2 Step Attenuator Port 2 Bias Tee
89. NE ON PRESS lt ENTER gt TO SELECT MENU DSK9 SELECT FILE TO COPY LE 1 LE2 LE 3 LE 4 ILE5 LE 6 LE7 LE 8 REVIOUS MENU PRESS lt ENTER gt TO SELECT PRESS lt 1 gt FOR PREVIOUS PAGE PRESS lt 2 gt FOR NEXT PAGE MENU DSK2 MENU 067 SELECT FILE MENU DSK7 TO READ MENU ORP2 SAVE SELECT FILE H W CALIBRATIONS FILE 1 TO DELETE __ SELECT MODE MENU DG2 FILE 2 FOR OUTPUT HW CAL LO AlE FILE 1 SERVICE LOG LE 3 HW CAL LO2 F FILE 2 HORIZONTAL DISPLAY LOG WENUDGS 4 VERTICAL HW_CAL PRE FILE 5 FILE 3 PHASE LOCK HIW CALIBRATIONS HW_CAL ALC FILES FILES SANE LOG DISK OPERATIONS eet FILE 5 PRESS ENTER TO FLOPPY DISK HW CAL ALL FILE 8 TO SELECT F OSERE CLEAR LOG SUR HE es PREVIOUS MENU PREVIOUS MENU E PREVIOUS MENU SAVE PRESS ENTER PRESS ENTER FIRE 7 gt PRESS lt ENTER gt FLOPPY DISK TO SELECT TO SELECT FILE 8 TO SELECT RECALL gt PRESS lt 1 gt FOR PREVIOUS MENU FROM HARD DISK PREVIOUS PAGE HESE gt RECALL p PRESS lt 2 gt FOR TO SELECT MENU DGA FROM FLOPPY DISK NEXT PAGE MESSIS FOR lt 1 gt DELETE PERIPHERAL TESTS FROM HARD DISK gt 22 PAGE DELETE gt FOR FROM FLOPPY DISK 5 FRONT PANEL COPY FROM HARD EXTERNAL KEYBOARD O FLOPPY DIS COPY FROM FLOPPY gt PRINTER INTE
90. NRITSU Customer Service Center If the GPIB Interface Test failed troubleshoot as follows Step 1 Replace the A18 Rear Panel PCB Step 2 Perform the GPIB Interface Test again if fail replace the A13 O 1 PCB Step 3 Perform the GPIB Interface Test again if fail contact ANRITSU Customer Service Center If the 373XXA measurement quality is suspect the following paragraphs provide guidelines and hints for determining possible measurement qual ity problems The quality of 373XXA VNA measurements is determined by the fol lowing test conditions and variables 373XXA MM TROUBLESHOOTING MEASUREMENT IN QUESTION Q Condition of the 373XXA Q Quality and condition of the interface connections and connec tors Q Quality and condition of the calibration components through lines adapters and fixtures Q Surrounding environmental conditions at the time of the mea surement Selection and performance of the calibration for the DUT being measured Measurement When determining possible measurement problems check the follow Conditions Check List ing items 1 Check the DUT and the calibration conditions ensure the Calibration Components Coefficients data has been installed into the system from the Calibration Kit in use Q ensurethe proper calibration was done for the device being measured For high insertion loss device measurements the calibra tion should include isolation high number of aver
91. OR VECTOR BIAS P B gt DEGAUSS SWITCH TEES CRT BRIGHT POT VIDEO VGA EXT VGA SCSI 68040 uP ETHERNET NME PALATTE m OUT MONITOR COPROCESSOR CONTROLLER VMECHIP2 CONTROLLER Zc TN e MEME __________ gt ANA OUT EXT ANA 1 DIGITAL IN WWE EXT DIG TERMINATOR LIMIT LIMIT LINE P O J19 BOARD LINES CONNECTORS P O J19 SREE PARALLEL c PORT INTERFACE CONNECTOR 17 TO A5 37 TO INTERNAL 37 HARD MOTHERBOARD PCB VGA MONITOR GPIB CONNECTOR DISK LOGIC DECODING T VME BUS SYSTEM SYSTEM HARD DISK GPIB GPIB BER CEA i M CONNECTOR DUUM E 2A ET FRONT PANEL PCB TO FLOPPY QUIET DISK DRIVE ASSY BUS BUS TO ANALOG TO 5 PCB TO EXTERNAL SUBSYSTEM KEYBOARD VME TERMINATIONS QUIET AID FRONT VME REAR DISK EXTERNAL BUS BUS PANEL INTERFACE PANEL DRIVE KEYBOARD CONTROL CONTROL INTERFACE INTERFACE CONTROL CONTROL VME Fc INTERFACE DECODING See Figure 7 2 LOGIC For future use STATE DECODING A14 I O 2 avons A13 1 0 1 PCB Figure 7 3 Digital Subsysten Block Diagram 7 14 373 XXA SYSTEM DESCRIPTION DIGITAL SUBSYSTEM ASSEMBLIES Q System boot up EPROM This chip contains the boot up instruc tions used by the system CPU at power up
92. Operational Tests This chapter contains procedures that provide a means of fully testing the373XXA VNA system for proper operation and signal stability These tests are intended to be used as a periodic check of the operational functionality of the373XXA Chapter 4 Performance Verification Procedures This chapter provides detailed procedures for verifying that the performance of the373XXA meets minimum performance standards Chapter 5 Troubleshooting This chapter provides information for troubleshooting Series373XXA Vector Network Analyzer sys tems The troubleshooting procedures contained in this chapter support fault isolation down to a re placeable subassembly Chapter 6 Adjustments This chapter provides adjustment procedures for all models of Series373XXA Vector Network Ana lyzer systems These procedures are used after replacement or repair of one or more critical subas semblies or as indicated by the Performance Verification Procedures contained in Chapter 4 Chapter 7 System Description This chapter provides descriptions of the functional operation of the major assemblies contained in Series373XXA Vector Network Analyzer systems The operation of all major circuit blocks is de scribed so that the reader may better understand the function of each assembly as part of the overall operation Chapter 8 Removal and Replacement Procedures This chapter describes how to gain access to all of the major assemblies and major
93. Pass Filter J3 Transfer Switch Test A Test B control Test B 40MHz 38GHz Test A 40MHz 38GHz 37 GHz HiPass Filter Test B 38 65 GHz J1 MUX Coupler Forward J3 J2 J1 MUX Coupler reverse J2 J2 gt 4 40 2 65GHz Test 40 2 65GHz Test NOTE Sampler Buffer amplifiers are individually matched to Power Amplifiers If either fails both should be replaced with another matched set part number ND53249 Indicates not present on model 37297B or 37277B Step Attenuator Bias Tee DCV DC voltages DC voltages J4 J5 J2 J3 J2 J3 J2 A6 PCB Analog to Digital Converter A5 PCB Test A IF Test B IF J4 J4 2 5 MHz CW Rear Panel Access Loop Coupled Arm J2 Front Panel Bias Tee Access Po Coupler gt Device Under Test DUT J3 Port 2 gt Coupler Coupled 42 Step Attenuator First LO 27 1 Power Amp Sampler Buffer Amp Second LO J1 4 34 J2 7 2 Test Test A 2 5 MHz CW Figure 5 3 37397A Test Signal Path Diagram 373XXA MM 5 25 SIGNAL PATHS TROUBLESHOOTING
94. REPAIR MAINTENANCE 373XXA MM REPAIR MAINTENANCE hering to connector interfaces When not in use keep the connectors covered Precision connectors should be inspected periodically Check for the following Bent or broken center pin Damaged threads Other bent or damaged connector parts Dirt or foreign material in connector cavity Oooo ANRITSU recommends that no maintenance other than cleaning be attempted by the customer Any device with a suspected defective con nector should be returned to ANRITSU for repair and or service when needed C 5 C 6 Performance Specifications APPENDIX PERFORMANCE SPECIFICATIONS Appendix D Performance Specifications SYSTEM PERFORMANCE Frequency Range RF Models 37317A 22 5 MHz to 8 6 GHz Microwave Models 37325A 40 MHz to 13 5 GHz 37347A 40 MHz to 20 GHz 37369A 40 MHz to 40 GHz 37397A 40 MHz to 65 GHz Dynamic Range The following table gives dynamic range in two manners Receiver Dynamic Range is defined as the ratio of the maximum signal level at Port 2 for 0 1 dB compression to the noise floor at Port 2 System Dynamic Range is defined as the ratio of the power incident on Port 2 in a through line connection to the noise floor at Port 2 forward measurements only In preparing the table 10 Hz IF bandwidth and 512 aver ages were used in calibration and measurement High Level Noise typical 0 04 dB and 0 5 peak to peak
95. RFACE HARD DISK GPIB INTERFACE PREVIOUS MENU MENU DG4 101 PREVIOUS MENU PRESS ENTER TROUBLESHOOTING PRESS ENTER rg 101 TO SELECT gt PHASE LOCK MENU DG4 MENU DG4_LO2 VOLTAGE TROUBLESHOOTING p gt TROUBLESHOOTING D A VOLTAGE FOR SERVICE 102 PREVIGUSMERU USE ONLY MENU 004 SOURCE NON RATIOED prr PRESS lt ENTER TROUBLESHOOTIN LOCK VOLTAGE lt gt PARAMETERS iem SHOOTING OUK VOETAG TO SELECT 101 MENU SOURCE LINEARITY LOCK VOLTAGE 102 VOLTAGE DDS PHASE EDIT SYSTEM SOURCE MENU DG4A EQUATIONS lt P power OUTPUT LOCK VOLTAGE FIRST LF VOLTAGE MAIN D A TROUBLESHOOTING MENU OM2 EQUATION BANDPASS VOLTAGE FOR SERVICE TO EDIT PREVIOUS MENU USE ONLY DEFINE BANDS OEFSETT A BAND 1 SOURCE 1 RECEIVER MODE DISPLAYED SOURCE 2 MORE PREVIOUS MENU SQURDEEOUIS FREQ RANGE RECEIVER FINISHED MENU DG4 PRESS ENTER SEARCH ON OFF TO SELECT FOR LOCK BAND START FREQ BECOYEREROM P TROUBLESHOOTING XXX XXXXXXXXX GHZ EQUATION TROUBLESHOOTING instr DVM CHANNEL SUMMARY BAND STOP FREQ PI die BANDPASS XXXx eu NOED 05 UNUSED CHANNEL FIRST LF BAND FUNCTIONS MERGER BANDPASS LATCH CONTROL EDIT SYSTEM gt x ADDRESS EQUATIONS LO1 FREQUENCY XXX STORE BAND 1 DIVISOR XX XXXX GHz UNUSED ADDRESS BANDS STORED HARMONIC NUM OFFSET FHEG P OUTPUT X DEFINITIONS NH PREVIOUS MENU TRIGGER WRITE P scr MULTIPLE PREVIOUS MENU is ENTER INPU
96. RROR CODE From Yes Fails above 38 GHz Normal power ab Port 1 S21 Yes Sheet 1 G G ils i o to 2 d See Sheet 3 Yes Fails below No 38 GHz No Normal power at Port 1 S21 Yes No Yes E ransfer Switch Buffer Amp 4 or Ref A MUX paras A8 Failure coupler A On al we 4 Buffer Buffer Amp 4 N S Amp Failure V or A8 Failure A xi Normal power at Port 1 521 Fails above 38 GHz No Nat logical Call x Gustomer Semice pd P d lt No SPDT Switch RUN SQM A8 or MUX Couple Failure Faora y Figure 5 2 Error Code DE Lock Failure Troubleshooting 37397A 2 of 3 373XXA MM 5 15 SYSTEM HAS ERROR CODE TROUBLESHOOTING From Sheet 1 logical Call Customer Service 5 Reverse Fails Only Yes Yes Fails below No 38 GHz Fails above 38 GHz Fails above 38 GHz Yes Yes No No f wat logical Call DN Normal power at Normal power at Normal power at Senes y Port 2 812 Port 2 812 Port 2 812 7 Yes Yes NO ves e f A8 transfer sw Ref B MUX Failure failure 2 a Ke oy Ref B SQM SPDT cowie A8 or MUX gt _ Buffer Amp 4 4 B
97. S INSTALCED ORTOS CALIBRATION CALIBRATIONS PERIPHERAL TESTS 102 FOR SERVICE CONTRO RRENO alisranon ii START ALC PRESS lt ENTER gt TO FREQUENCY FREQ CALIBRATION SELECT FOR SERVICE gt SOURCE ALC PREVIOUS MENU NLY CALIBRATION PRESS lt ENTER gt TO PRESS lt ENTER gt TO DISK OPERATIONS SELECT SELECT PREVIOUS MENU PRESS lt ENTER gt TO SELECT 6 6 373XXA MM ADJUSTMENTS FREQUENCY CALIBRATION Step 3 Follow the directions displayed on the screen to set up and connect the frequency counter to the 373XXA Refer also to Figure 6 1 Select START SOURCE FREQ CALIBRA TION from menu above Dedicated GPIB 373XXAVNA aj 85800 Sog 00 99 900 009 0 gt Microwave Cable Figure 6 1 Test Setup for Frequency Calibration Step 4 Follow the directions displayed on the 373XXA CRT screen until calibration is completed Post Calibration After the calibration process is completed perform the following ac Actions tions as appropriate If calibration passes Savethe calibration data to hard disk as follows Step 1 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu Step 2 Select DIAGNOSTICS from menu Then se
98. Set Module tray see Figure 8 9 Step 5 Carefully pull the floppy disk drive assembly to the rear and up to remove assembly Step 6 Carefully remove the Floppy Control cable from the rear of the floppy drive Set aside for re use 8 18 373XXA MM REMOVE AND REPLACE REAR PANEL ASSEMBLY To replace the Floppy Disk Drive assembly perform the steps above the reverse order 8 12 REAR PANEL This paragraph provides instructions for removing and replacing the ASSEMBLY Rear Panel Assembly Equipment Required Option 11 only Connector torque wrench 5 ANRITSU Model 01 201 or equivalent Preliminary Switch 373XXA power off Remove the power cord Remove all covers paragraph 8 3 Remove Replace Procedure Step 1 Place the 373XXA in normal top side up position Step 2 Remove the three screws on each side of the chassis that fasten to the rear panel assembly See Figure 8 10 p Rear Panel Assembly screws par 8 11 2 Fan Assembly screws par 8 12 3 Power Supply Assembly screws par 8 13 4 A18 Rear Panel PCB screw par 8 14 Figure 8 10 Location of Mounting Screws for Rear Pand Assemblies 373XXA MM 8 19 REAR PANEL ASSEMBLY 8 20 Step 3 Step 4 Step 5 Step 6 Step 7 Step 8 Step 9 Step 10 Step 11 Step 12 Step 13 Step 14 REMOVE AND REPLACE Remove the two screws located near top and midd
99. Signal Source Phase Lock Loop Assemblies 5 17 Signal Source Test Set Module Error Codes 5 18 sol ation Procedures IPAE cc c 5 19 PERIPHERAES INTEREACE Sei cede or 5 21 CRT Display Test Failures m mene 5 21 Front Panel Test Failures sene qos ea 5 22 External Keyboard Interface Test Failure 5 22 Printer Interface Test geo 5 22 GPIB Interface Test Failures 5 22 MEASUREMENT QUESTION 5 22 Measurement Conditions Check List 5 23 Chapter 6 Adjustments 6 1 6 2 373 XXA MM INTRODUCTION 6 3 LOL CALIBRATION ub oe tac Se Tt a are 6 3 Calibration Procedure ce Pier yar Sorat state E ES 6 3 Post Calibration Actions o osos osoo 6 3 6 3 6 4 6 5 6 6 6 7 6 8 LO 2 CALIBRATION 4 a 6 4 Calibration Procedure zu Us pa eR COR deat Pom Su Ln 6 4 Post Calibration Actions 6 5 FREQUENCY CALIBRATION e n n n 6 5 Calibration Procedure We gU e a We at Chap viet wl oa CORE TCR RD 6 6 Post Calibration Actions aude
100. T X SOURCE MODE SELEC PREVIOUS MENU PRESS ENTER PRESS ENTER TO SELECT p gt PRESS ENTER TO SELECT O SELECT OR TURN TROUBLESHOOTING RECEIVER MODE SOURCE LOCK TRACKING SETON PRESS ENTER TO SELECT MENU DG4 RCVR FigureA 1 Diagnostics Menus 373XXA MM A 7 A 8 Appendix Error Messages Table of Contents B 1 B 2 B 3 B 4 B 5 INTRODUCTION ttt ts B 3 OPERATIONAL ERROR MESSAGES 3 DISK RELATED ERROR 55 5 B 3 GPIB RELATED ERROR MESSAGES sse B 3 SERVICE LOG ERROR MESSAGES B 3 0000 0099 Se cay Rm 3 0100 m 3999 mp EM IE Rm EL B 3 4000 4900 5 573 Te a s ee 4 B 4 5000 5999 Gar goat te Cla Peat qe co CLR Cae eat ee ye B 4 6000 6999 B 4 70002 7999 RU nmm RR mE ERN B 4 8000 899090 4 1 2 OPERATIONAL ERROR MESSAGES B 3 DISK RELATED ERROR MESSAGES B 4 GPIB RELATED ERROR MESSAGES B 5 SERVICE Loc ERROR MESSAGES 0000 0099 0100 3999 373XXA MM Appendix B Error Messages This appendix provides a listing of error messages that appear on the 373XXA display or that are written to
101. Troubleshooting 6 8 A21A2 ADJUSTMENT This adjustment ensures the correct RF power level will be available 37397A to drive the source quadrupler modules SQMs Perform these adjust ments as follows D454244 is replaced A21A2 PCB is replaced C21620 YIG Oscillator is replaced NOTE Failure to perform this adjustment may result in intermit tent operation Calibration Perform the following steps Procedure Refer to Table 1 1 located on page 1 9 for further information about the following equipment HP 437B Power Meter with HP 8487A Power Sensor or ANRITSU ML24XXA with Version 2 02 or later with ANRITSU Power Sensors MA2474A and SC6230 for 50 and 65 GHz units Gigatronics 8541 8542 with 80304A Power Sensor GPIB cable WILTRON 2100 2 or equivalent NOTE Allow the 373XXA and power meter to warm up at least 30 minutes prior to performing calibration 6 14 373XXA MM ADJUSTMENTS A21A2 ADJUSTMENT 37397 Procedure Step 1 With power off and the new part installed disconnect the RF cable from 4 of the Switched Filter Step 2 Install Power Sensor use a 6 or 10 dB pad for protection to Switched Filter J 4 Step 3 Turn on the 373XXA and set it to 38 GHz CW Step 4 Adjust A21A2R238 for maximum power but not over 26 dBm Step 5 Remove the pad and sensor and reconnect the RF cable to J 4 Step 6 Perform the procedures in paragraph 6 4 and 6 5 fre quency and ALC calibrations
102. ULE ASSEMBLIES 404040404040 404040400000 0 404004040404 040 60000 8 25 Transfer Switch o n B B n nA 8 25 Input Coupler s Low Freq Bridge s 37777 8 26 Power Amplifier lt lt nm I I Be 8 26 Buffer Amplifier Sampler A31 n nn 8 27 Switched Doubler ModuleAssembly cx 8 28 REMOVE REPLACE SIGNAL SOURCE MODULE ASSEMBLIES DIDI 8 29 Removal of Signal Source Module 8 29 2142 Source Control PCB onem cae fedem ops RL gat 8 31 21 1 Source YIG Bias Control 8 32 Switched Filter Assembly 99999999999 8 33 Down Converter Assembly seo ene ure e 8 33 YIG Oscillator Assembly gt gt 5 tamm cette cnn 8 34 Chapter 8 Remove and Replace Procedures 8 1 INTRODUCTION This chapter provides procedures for removing and replacing 373XXA field exchangeable assemblies and components When using these pro cedures please observe the warning and caution notices below WARNING Hazardous voltages are present inside the instrument when ac line power is connected Turn off the instrument and remove the line cord before removing any covers or panels CAUTION Many assemblies in the 373XXA contain static sensitive components Improper handling of these assemblies may result in damage to the assemblies Always observe the static sensitive component handling precautions described in
103. a 2000 665 Power Cable U K 2000 666 Power Cable Japan 2000 667 Power Cable South Africa 2225 1 Spare Parallel Interface Printer Cable 373 XXA MM APPENDIX Model 37347A Connectors Reflection Measurements PERFORMANCE SPECIFICATIONS Model 37347A K Connectors Transmission M easurements Reflection Magnitude Uncertainty 37x47A B 3652 Reflection Only 10 i d1 OE ia __ _ ___ a alu 40 35 30 25 20 15 10 5 0 Reflection Phase Uncertainty 37x47A B 3652 Reflection Only 100 4 4 L1 113 LL L1 L1 _ LL 2710 jJ L1 pp pp ppp tp ppp 11111 40 35 30 25 20 Device S11 dB 15 10 373XXA MM Transmission Magnitude Uncertainty 37x47A B 3652 Transmission Only 1 454 390 80 60 50 40 30 20 10 0 10 Device 21 dB Transmission Phase Uncertainty 37x47A B 3652 Transmission Only 90 80 70 60 50 40 30 20 10 0 10 Device 521 dB D 13 PERFORMANCE SPECIFICATIONS APPENDIX D 37369A Connectors Moda 37369A Connectors Relection Measurements Transmission Measurements Transmission M
104. a surement uncertainty of the verification standards and the 373XXA measurement uncertainty Verification Result The software verification process compares the measured S parameter Determinati on 4 4 VERIFICATION PROCEDURE 373XXA MM data of the impedance transfer standards against the original standard data for those devices that was obtained using the Factory Standard 360 Vector Network Analyzer System at ANRITSU The factory Standard 360 system is traceable to NIST through the ANRITSU Calibration Labo ratory s Impedance Standards These standards are traceable to NIST through precision mechanical measurements NIST approved microwave theory impedance derivation methods and electrical impedance compari son 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 critical factors are Thestability and quality of the devices in the calibration and verifi cation kits The condition of 373XXA test port connectors and through cables The pin depths of all connectors and the proper torquing of connec tions These same factors also affect 373XXA measurement quality Consult the Operating Manuals supplied with the ANRITSU Calibra tion and Verification Kits for proper use care and maintenance of the devices contained in these kits The performance verification procedure for the ANRITSU 373XXA VNA is
105. ages and lower IF Bandwidth settings during the calibration For high return loss device measurements the calibra tion should also include a sliding load calibration Check DUT mating connector s condition and pin depth Q Measurean alternate known good DUT if possible Check if the environment is stable enough for the accuracy re quired for the DUT measurement The system should not be subjected to variations in tem perature The system should not be placed in direct sun light or next to a changing cooling source such as a fan or air conditioning unit 2 Checkthecalibration using known good components from the cal ibration kit If measurements of these devices do not produce good results Check through cable stability induding condition and pin depth Replace with a known good cable if necessary Check condition and pin depth of calibration kit components Replace with known good components if necessary Check condition and pin depth of test port connectors Replace with known good ones if necessary 373XXA MM 5 23 MEASUREMENT IN QUESTION TROUBLESHOOTING NOTE The procedures for performing pin depth measurements for the connectors used on ANRITSU products are con tained in Appendix C Connector Maintenance Check Pro cedures 3 Check the system performance as follows Performthe Signal Path Tests that are part of the Operational Tests Refer to Chapter 3 Operational Te
106. agnitude Uncertainty Reflection Magnitude Uncertainty 37x69A B 3652 Transmission Only 37x69A B 3652 Reflection Only 10 10 1 1 tee 111 aT gne Epp 90 80 70 60 50 40 30 20 10 0 10 521 48 40 35 30 25 20 15 10 5 0 oe Device S11 dB Transmission Phase Uncertainty 4 i 37x69A B 3652 Transmission Only Reflection Phase Uncertainty 37x17A B 3650 Reflection Only 90 80 270 60 50 40 30 20 10 0 10 Device S21 dB 40 35 30 25 20 15 10 5 0 Device S11 dB D 14 373 XXA MM APPENDIX PERFORMANCE SPECIFICATIONS 37397 V Connectors 37397 V Connectors Relection Measurements Transmission Measurements Reflection Magnitude Uncertainty 37x97A B 3654B Reflection Only Transmission Magnitude Uncertainty 37x97A B 3654B Transmission Only 4 5 25 2 4 4 2 9 30 Device S11 dB gt 5 90 80 60 50 40 30 20 10 10 Device 821 dB Reflection Phase Uncertainty 5 37x97A B 3654B Reflection Only Transmission Phase Uncertainty 37x97A B 3654B Transmission Only 100
107. aining two groups The calibration results for the Test B Channel PCB A6 See de scription for A above The calibration results for the Reference A or B Channel PCB A4 See description for A above OVL Indicates the value was too far out of range to be measurable PHSLCK Source Locking L Source Lock Mode T Tracking Mode S Set On Mode 373XXA MM 5 13 SYSTEM HAS ERROR CODE TROUBLESHOOTING Lock Failure DE Error Code 6 Fails both Forward and Reverse See Sheet 2 Yes Fails below 38 GHz Yes Fails above Fails above 38 GHz Yes 38 GHz Yes No Not logical Call Customer Service Normal power at Port 1 Normal i SDM SW filter Xfer Switch or source PCB failure Buffer Amp Power Amp or A1 Failure Normal power at Port 1 No No Yes A8 YIG Osc SW filter or Source PCB Failure A8 Buffer Amp Failure OK 40MHz to 272MHz SPDT Switch SW Filter A8 or Source PCB Failure Yes Buffer Amp A4 or A8 Failure NOTE Sampler Buffer amplifiers are individually matched to Power Amplifiers If either fails both should be replaced with another matched set part number ND53249 Power Amp or LO1 Failure Figure 5 2 Error Code DE Lock Failure Troubleshooting 37397A 1 of 3 5 14 373XXA MM TROUBLESHOOTING SYSTEM HAS E
108. air Extended Service Options Additional two year and four year return to Anritsu service is available as an option for 373XXA systems and components Prices and details are available from your Sales Representative or by contacting the factory CALIBRATION KITS Standard 3650 SMA 3 5 mm Calibration Kit Option 1 Male and Female Sliding Terminations 3651 GPC 7 Calibration Kit Option 1 Sliding Terminations 3652 K Connector Calibration Kit Option 1 Male and Female Sliding Terminations 3653 Type N Calibration Kit 3654B Type V Calibration Kit includes male amp female sliding terminations Economy 8 6 GHz 3750 SMA Calibration Kit 3751 GPC 7 Calibration Kit 3753 Type N 50 W Calibration Kit 3753 75 Type 75 Calibration Kit VERIFICATION KITS 3663 Type N Verifications Kit 3666 3 5 mm Verifications Kit 3667 GPC 7 Verifications Kit 3668 K Connector Verifications Kit 3669B V Connector Verifications Kit SEMI RIGID TEST PORT CABLES 3670A50 1 DC to 18 GHz GPC 7 connectors 1 foot long two required 3670A50 2 DC to 18 GHz GPC 7 connectors 2 feet long 3670K50 1 DC to 40 GHz K connectors 1 foot long male female two required 3670K50 2 DC to 40 GHz K connectors 2 feet long male female D 11 PERFORMANCE SPECIFICATIONS 3670V50 1 DC to 65 GHz V connectors 1 foot long male female two required 3670V50 2 DC to 65 GHz V connectors 2 feet long male female FLEXIBLE TEST PORT CABLES 3671A50 1 GPC 7
109. all models The 37XXX Series Vector Network Analyzer Programming Manual 10410 00200 describes all 373XXA GPIB commands and provides programming information for operation of the 373XXA remotely via thelEEE 488 General Purpose Interface Bus I nduded at the rear of this manual is the 37XXX Series Vector Network Analyzer GPIB Quick Reference Guide 10410 00201 Model 360X 373XXA V NA Performance Verification Software Users Guide P N 10410 00208 located in Appendix E at the rear of this manual This Software Users Guide explains in detail the procedures to be used for the installation and operation of the 373XXA VNA Veri fication Software on your computer controller 1 7 STANDARD OPTIONS The standard 373XXA VNA options and their respective U pgrade Kit part numbers are Option Description Upgrade Kit Opt 1 Rack Mount with slides ND39486 Opt 1A Rack Mount ND40916 Opt 2A Time Domain Microwave ND39477 Units Opt 2B Time Domain RF Units ND40914 Opt 10A High Stability Ovenized Time ND45045 Base All options listed can be installed at ANRITSU Service Centers 1 4 373XXA MM GENERAL INFORMATION SERVICE STRATEGY 1 8 SERVICE STRATEGY Functional Assembly Level Troubleshooting Internal Hardware Adjustments and Calibrations Internal Service Log 373XXA MM This paragraph provides an overview of the 373XXA VNA service strat egy and available service facilities It also provides references to the infor mation in various loca
110. ans of fully testing the 373XXA system for proper operation and signal stability These tests are intended to be used as a periodic check of the operational functionality of the 373XXA The tests should be performed in their entirety at least once annually Although there is no requirement to do so the tests should generally be run in the sequence presented NOTE The procedures presented in Chapter 4 Performance Veri fication provide the means to test the accuracy of the tests performed by the 373XXA Please ensure you have read and fully understand the servicing con cepts for the 373XXA presented in Chapter 1 prior to continuing with this chapter Operational Tests for the 373XXA consist of the following Checking the Service Log Peripherals and Interface Testing Self Test Signal Path Tests includes Checking the Service Log and Self Test These tests are described in paragraphs 3 2 through 3 5 which start on the next page 3 3 CHECKING THE SERVICE LOG OPERATIONAL TESTS 3 2 CHECKING THE Checking the service log consists of viewing the entries written into the SERVICE LOG log CAUTION The service log contains historical information about in strument condition and any failures that may have oc curred It should be cleared only by a qualified service engineer Such clearing shuld be accomplished only upon determining that the errors need not be saved to disk or printed out for service pur
111. any ANACAT is a registered trademark of EEsof Inc Ink J et and Think J et are registered trademarks of Hewlett Packard Co MS DOS is a registered trademark of Microsoft Corporation NOTICE ANRITSU Company has prepared this manual for use by ANRITSU Company personnel and cus tomers as a guide for the proper installation operation and maintenance of ANRITSU Company equipment and computer programs The drawings specifications and information contained herein are the property of ANRITSU Company and any unauthorized use or disclosure of these drawings specifications and information is prohibited they shall not be reproduced copied or used in whole or in part as the basis for manufacture or sale of the equipment or software programs without the prior written consent of ANRITSU Company Table of Contents Narrative Chapter 1 General Service Information This chapter provides a general description of Series373XXA Vector Network Analyzer systems sys tem serial numbers and frequency ranges It explains the level of maintenance covered in this man ual and the service strategy used throughout this manual It also contains static sensitive component handling precautions and a list of recommended test equipment Chapter 2 Replaceable Parts This chapter lists all replaceable subassemblies and components for all373XXA models It explains the ANRITSUexchange assembly program and provides parts ordering information Chapter 3
112. ard A13 B Initializing external trigger A13 A5 If during boot up the 373XXA does not attempt to display any mes sages at all proceed as follows Step 1 Replace the A15 Graphics Processor PCB Step 2 Retry boot up If fail replace the nternal VGA Monitor Step 3 Retry boot up If fail replace the A9 Main Processor PCB Step 4 Retry boot up If fail contact ANRITSU Customer Service Center If the system halts before it completes all five digital sections process as follows Step 1 Replace the PCB indicated on the last displayed message Example If the system halt at the Initializing front panel knob A14 A20 replacethe A14 and A20 PCBs Step 2 Retry to boot the system If it still fails contact ANRITSU Customer Service If the 373XXA detects a problem during normal operation an error mes sage consisting of an error code followed by a brief error message will be displayed on the screen The error code will also be written tothe service log along with some of the operating data gathered from the system at thetime of failure 373XXA MM TROUBLESHOOTING Self TestE rror Codes Phase Lock Error Codes 6000 Series 373XXA MM SYSTEM HAS ERROR CODE System error codes in the range 0100 3999 identify the suspected failed subassembly in the two most significant digits of the error code For example error codes 0200 0299 are related to the A2 LO2 PCB assembly This error code assignment
113. as 1 4 STANDARD OPTIONS MDC EIE 1 4 SERVICE STRATEGY WU qup ixl Ue ap geo Tara RP CRY sm 1 5 Functional Assembly Level Troubleshooting 1 5 Internal Hardware Adjustments and Calibrations 1 5 nternal Service Log Vr im uiris den dec NE mie de NUS el te er tare 1 5 System Test Certification 1 6 Preventive Service ay Uds GoM sue SG ies pale Shs tae Tele ge gia oe CIN ACE as Oe 1 6 Servicing Specially Modified Instruments gt 1 6 SERVICE SUPPORT We EU 4 Gal tae GR See 1 6 Technical Support woe Sige ue Gap QNO at 1 7 F ield Service Kits up tat ee sake fue fence tat Tee dhe Ves ter ee ne 1 7 Service Software wid Ses ate E viet fer tate Sal execs 1 7 Verification Kits we ur ara Kar chr teat die erat he ios Gey aly ae 1 8 Test Fixtures Aids GL 187 lt edu r7 1 8 Failed Assembly Exchange Program 22 77 77 1 8 PERFORMANCE SPECIFICATIONS sss see 1 9 5 TE 1 9 STATIC SENSITIVE COMPONENT HANDLING PROCEDURES cL 1 9 RECOMMENDED TESTEQUIPMENT
114. assed through one of four low pass filters located in the Switched Fil ter Assembly The cut off frequencies for these filters are 3 3 GHz 5 5 GHz 8 4 GHz and 13 5 GHz respectively The signal is then passed through a 20 GHz high pass filter before being routed either di rectly to the Test Set Module or to the Down Converter Assembly The signal is switched to the Down Converter Assembly only when the 373XXA is operating in the low end portion of its frequency range The frequency of the output signal from the Down Converter Assembly is 22 5 MHz to 2 GHz for Models 37311Aand 37317A and 40 MHz to 2 GHz for Models 37225B and above The output signal from the Down Converter Assembly is routed to the Test Set Module The Test Set Module consists of the items listed below refer to Figure 7 2 Q Transfer Switch assembly Two Couplers Models 37325A and above or two Low Frequency Bridges Models 37317A and below Switched Doubler Module for 20 40 GHz operation M odel 37369A In the Test Set Module the 22 5 MHz 20 GHz signal from the signal source module is switched via the Transfer Switch between the front panel Port 1 and Port 2 connectors The Transfer Switch is controlled by the A9 Main Processor PCB to set the direction of signal flow for the desired test Port 1 Forward Port 2 reverse For operation be tween 20 GHz and 40 GHz the stimulus signal is routed tothe Switched Doubler M odule before being sent to the Trans
115. assembly number being the two high order digits example error 0111 indicates test 11 for the A1 assembly has failed similarly error 0814 is related to the A8 assembly test 14 and error 2138 is related tothe A21 assembly test 38 Sincethese errors are primarily self test errors they do not get dis played but only get written to the service log Any exceptions to this B 3 4 4000 4999 5 5999 6000 6999 7000 7999 8000 8999 SERVICE LOG ERROR MESSAGES APPENDIX B rule will be an assembly error code between 00 where xx 15 the assembly that is suspected of failing during normal operation F or example error 0500 is a run time error related to the A5 A D assem bly These messages indicate internal H W calibration problems These messages indicate run time RF power problems These messages indicate run time phase lock problems A letter or se quence of letters following the error message depict the suspect assem bly ies as follows A 10 MHz Reference B LO1 unlocked LO2 unlocked D Source unlocked E IF lock signal level too low F External synthesizer unlocked G LO3 unlocked None Unknown OCOOOOOdO These messages indicate a run time digital section problem These messages indicate a run time processing system problem 373XXA MM APPENDIX SERVICE LOG ERROR MESSAGES Table 1 Operational Error Messages 1 of 2 Error Message Descript
116. bration constants in its internal battery backed RAM BBRAM The procedures for adjusting the 373XXA are described in this manual in Chapter 6 Adjustments The 373XXA continuously monitors 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 writes the error message along with some data pertinent tothefailureto an internal servicelog stored in battery backed memory The service log can be checked at any time to view without erasing all error messages that were written into it It is capable of storing SERVICE SUPPORT System Test Certification Preventive Service Servicing Specially Modified Instruments 1 9 service 1 6 GENERAL INFORMATION more than 30 pages of service messages and data The 373XXA will automatically remove the oldest errors first to make room for new er rors if necessary To check the contents of the service log use the pro cedure described in Chapter 3 Operational Tests NOTE A printed or disk file copy of the Service Log with the fail urein question must be made available to ANRITSU when exchanging a failed assembly or when requesting service support Refer to Chapter 2 Replaceable Parts for further information Quick operational checkout of the system may be accomplished by the system user or for incoming inspection pu
117. calibration type ALL date and system model and serial numbers Set the copy protect tab on the disk Properly safeguard the disk so that it will be available for later use as needed Step 3 Switch the 373XXA power off Remove the power cord Remove Replace Procedure Step 1 Remove the top cover and the large card cage cover to ex pose the A1 A9 PCBs refer to paragraph 8 4 Step 2 Remove the A9 PCB from the unit Step 3 Locate and remove the BBRAM chip from the A9 PCB See Figure 8 3 Step 4 Replace the BBRAM chip on the A9 PCB Step 5 Reinstall the A9 PCB the large card cage cover and the top cover Step 6 Reconnect power cord Switch 373XXA power on Post Replacement Procedure Recall the calibration data saved in the Preliminary step from the floppy disk as follows Step 1 Insert the floppy disk with the previously saved Source Frequency and ALC Calibrations Data in the 373XXA floppy disk drive Step 2 Select DIAGNOSTICS from the menu left Then select in sequence H W CALIBRATIONS DISK OPERATIONS RECALL CAL FROM FLOPPY DISK HW CAL ALL 373XXA MM REMOVE AND REPLACE OPTIONS DIAGNOSTICS TRIGGERS START SELF TEST REAR PANEL READ SERVICE LOG STR INSTALLED OPTIONS MUI E PERIPHERAL TESTS TROUBLESHOOTING CONTROL FOR SERVICE PRESS ENTER NLY TO SELECT H W CALIBRATIONS FOR SERVICE NLY PRESS ENTER TO SELECT H W CALIBRATIONS CAL
118. ce Test Failures 5 22 MEASUREMENT IN QUESTION ees 5 22 Measurement Conditions Check List nne 5 23 Many of the troubleshooting procedures presented in this chapter quire the removal of instrument covers to gain access to printed cir cuit assemblies and other major assemblies WARNING Hazardous voltages are present inside the instru ment when ac line power is connected Turn off the instrument and remove the line cord before remov ing any covers or panels Trouble shooting or repair procedures should only be performed by service per sonnel who are fully aware of the potential hazards CAUTION Many assemblies in the 373XXA contain static sensitive components mproper handling of these assemblies may result in damage to the assem blies Always observe the static sensitive component handling precautions described in Chapter 1 Figure 1 2 CAUTION Never operate the 373XXA with connector J 3 of the A21A2 Source Control PCB disconnected Operation in this mode may cause damage the A31 Buffer Amplifier Sampler assembly 5 1 INTRODUCTION 5 2 ASSOCIATED INFORMATION IN THIS MANUAL 373XXA MM Chapter 5 Troubleshooting This chapter provides specific procedures to be followed when trouble shooting 373XXA VNA systems While performing these procedures al ways observe the warnings and cautions on the opposite page To use the troubleshoot
119. com pany the failed assembly Refer to Chapter 2 Replaceable Parts for further information 373XXA MM GENERAL INFORMATION PERFORMANCE SPECIFICATIONS 1 10 PERFORMANCE SPECIFICATIONS 1 11 service centers 1 12 STATIC SENSITIVE COMPONENT HANDLING PROCEDURES 1 13 RECOMMENDED TEST EQUIPMENT 373XXA MM The performance specifications for all Series 373X XA models are con tained in the Technical Data Sheets that are located in Appendix D Performance Specifications ANRITSU Company offers a full range of repair and calibration services at fully staffed and equipped service centers throughout the world Table 2 1 located on page 2 4 lists all ANRITSU services centers 373XXA contains components that can be damaged by static electric ity Figure 1 2 illustrates the precautions that should be followed when handling static sensitive subassemblies and components If followed these precautions will minimize the possibilities of static shock damage to these items Table 1 1 lists the recommended test equipment to be used for all mainte nance activities for all Series 373XXA models Note the Use codes listed in the right hand column of the table These codes list the appli cable maintenance activities for the equipment listed 1 9 struments GPIB hardware and software RECOMMENDED TEST EQUIPMENT GENERAL INFORMATION Table 1 1 Recommended Test Equipment 1 of 2 CRITICAL RECOMMENDED USE INSTRUMENT SPEC
120. crystal display LCD front panel keys and peripheral devices that are used with the 373XXA They consist of the following LCD Test Front Panel Test External K eyboard nterface Test Printer Interface Test GPIB Interface Test D O O LCD Test This test verifies that the 373XXA LCD is functioning correctly NOTE The External VGA Out Connector can also be tested when using this procedure if an external VGA monitor is con nected Procedure Step 1 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu Step2 Select DIAGNOSTICS from menu then in sequence se lec PERIPHERAL TESTS and then CRT DISPL AY See diagram below OPTIONS DIAGNOSTICS PERIPHERAL TESTS TRIGGERS START SELF TEST CRT DISPLAY REAR PANEL READ SERVICE LOG FRONT PANEL OUTPUT INSTALLED OPTIONS EXTERNAL KEY DIAGNOSTICS PERIPHERAL TESTS BOARD EERE SOURCE TROUBLESHOOTING PRINTER INTERFACE baie SERVICE GPIB INTERFACE PRESS lt ENTER gt TO NLY PREVIOUS MENU SELECT HW CALIBRATIONS EOR SERVICE PRESS lt ENTER gt TO NLY SELECT PRESS lt ENTER gt TO SELECT Step 3 pleted Follow instructions on the CRT screen until test is com If test fails proceed to Chapter 5 Troubleshooting 3 6 373XXA MM OPERATIONAL TESTS External Keyboard Interface Test Printer Interface Test 373XXA MM PERIPHERALS AND INTERFACES Front Panel This test verifies t
121. d organic solvents If lithium batteries such as this one are mistreated or incorrectly handled they may burst open and ignite This can result in possible in jury or fire When handling the SRAM battery carefully following the following precautions DO NOT short circuit DO NOT disassemble deform or apply excessive pres sure DO NOT heat or incinerate DO NOT apply solder directly DO NOT mix model or new and old batteries DO NOT charge ALWAY S check that proper polarity is observed Remove Replace Procedure Step 1 Step 2 Step 3 Step 4 Step 5 Remove the top cover and the large card cage cover to ex posethe A1 A9 PCBs refer to paragraph 8 4 Remove the A9 PCB from the unit Locate and carefully remove the SRAM battery from the A9 PCB SeeFigure 8 4 Replace the SRAM battery on the A9 PCB as follows Insure that the pins are clean Note the polarity and carefully press the batterly into the socket Reinstall the A9 PCB the large card cage cover and the top cover Post Replacement Procedure Step 1 Step 2 Step 3 Connect power cord Switch 373XXA power on Ensurethe system sweeps several times without errors Refer to Chapter 3 Operational Tests Perform the follow ing 373XXA MM REMOVE AND REPLACE PREVIOUS MENU PRESS lt ENTER gt TO SELECT OR USE KEYPAD SAVE RECALL RECALL FRONT PAN
122. d then adjust their amplitude for input to the synchronous detector stage of each PCB Each 80 kHz IF signal is synchronously detected and converted into a pair of DC signals that contain the information for the real and imaginary portions of the original 80 KHz IF signal Thus the three IF signals two test signals and the reference signal yield six DC signals that fully represent the real and imaginary vector components of the DUT s S parameters ThelF Section also checks the 2 5 MHz phase lock signal for proper power level by comparing it to a known reference level on the A4 PCB A sample of the 2 5 MHz Reference A B IF signal is sent tothe A8 Source Lock Separation Control PCB assembly for phase locking the signal source module The A3 and A6 PCBs are functionally identical and physically interchangeable 7 11 ANALOG SUBSYSTEM ASSEMBLIES SYSTEM DESCRIPTION A7 PCB LO3 A5 A D Converter PCB 7 12 TheA7 Third Local 1 Assembly provides a fixed 2 42 MHz Local Oscillator signal that is used on the A3 A4 and A6 PCBs to down convert the 2 5 MHz IF signals to 80 kHz It also provides an 80 kHz standard signal for the IF Section Calibration process that occurs au tomatically approximately every six minutes This automatic IF Section Calibration is one of the 373XXA features that ensures rated measure ment accuracy Automatic F Calibration can be turned off and or invoked at any time during measurement sweeps
123. date clock functions It is used to store low level boot up parameters AL C calibration data source frequency calibration data and service log header data 512 KB SRAM This auxiliary memory is backed up by a non rechargeable Lithium battery that provides 200 days maxi mum of power off protection It is used to store current and saved front panel setups trace normalization data current RF calibration data current sweep frequency data flat power cali bration data and the service log error list VME Bus interface chip This chip is used to interface the Main Processor PCB tothe A13 14 and A15 digital PCBs via the VME bus interface SCSI Bus interface This chip is used to interface the Main Pro cessor PCB totheA16 Hard Disk PCB 7 13 DIGITAL SUBSYSTEM ASSEMBLIES MICROPROCESSOR DRAM SRAM BATTERY A18 REAR PCB MEMORY MEMORY BACKED A15 GRAPHICS PCB PANEL PCB ARRAY ARRAY WITH RAM CLOCK BIAS TEE REAR PAN NE EPROM GRAPHICS INTERRUPT DRAN To FLASH PROCESS
124. disconnect Flex PCB Assembly from LCD Assembly Remove the four screws that fasten the monitor assembly tothe chassis see Figure 8 8 Gently move the monitor assembly to the rear and lift away from chassis To replace the Internal LCD Monitor assembly perform the steps above in the reverse order Connector LCD Back Light Driver PCB s 4 lA 4 Places Figure 8 8 Location of Internal LCD Assembly Mounting Screws 8 16 373XXA REMOVE AND REPLACE 8 10A LCD BACKLIGHT LAMP 8 11 FLOPPY DISK DRIVE 373XXA MM FLOPPY DISK DRIVE This paragraph provides instructions for the removal and replacement of the LCD Backlight Lamp which is recommended at approximately 10 000 hours of operation or if the display becomes dim NOTE The front panel assembly does not have to be removed Preliminary Switch 373XXA power off Remove the power cord Remove all covers paragraph 8 3 Remove Replace Procedure Step 1 Remove the LCD assembly paragraph 8 10 Step 2 Remove the Backlight Lamp cover as follows On Sharp LQ9D169 LCD displays remove the three Phil lips screws on the side opposite the PCB then lift off the cover On Sharp LQ9D340 LCD displays on the side opposite the PCB remove the tape covering the center catch Starting at one end very carefully push each catch clear of its tab while gently lifting the c
125. e Power Supply Module Preliminary Switch373XXA power off Remove the power cord Remove all covers paragraph 8 3 Remove Rear Panel paragraph 8 12 Remove Replace Procedure Step 1 Place the Rear Panel Assembly on the work surface with the Power Supply Module down 8 21 18 REAR PANEL PCB 8 15 A18 REAR PANEL PCB 8 22 REMOVE AND REPLACE Step 2 Remove the six screws from the rear panel that fasten it to the left and right edges of the Power Supply Module see Figure 8 10 Gently separate the two units To replace the Power Supply Module perform the steps above the reverse order This paragraph provides instructions for removing and replacing the A18 Rear Panel PCB assembly Equipment Required Nut Driver Nut Driver in Preliminary Switch373XXA power off Remove the power cord Remove all covers paragraph 8 3 Remove Rear Panel paragraph 8 12 Remove Replace Procedure Step 1 Place the Rear Panel Assembly on the work surface with the 18 Rear Panel PCB up Step 2 Disconnect the two conductor fan power cable at connector P6 of the A18 PCB Step 3 Disconnect the wiring for the rear panel Bias Fuses at con nector P4 of the A18 PCB Step 4 Turn Rear Panel Assembly over Remove screw located at lower left corner of the rear panel that fastens the A18 PCB tothe Rear Panel Assembly see Figure 8 10 Step 5 Using in nut driv
126. e also recorded in the service log for certain system failures 373XXA MM SYSTEM DESCRIPTION 7 4 DIGITAL SUBSYSTEM ASSEMBLIES DIGITAL SUBSYSTEM ASSEMBLIES The following paragraphs briefly describe the major assemblies that com prise the 373XXA Digital Subsystem The digital subsystem provides all system control O interface digital signal processing and data pre sentation functions The major assemblies that comprise the 373XXA digital PCB subsys tem are listed below Refer to Figure 7 3 at left a m m m m m m m m m A9 Main Processor PCB 13 1 0 Interface 1 14 1 0 1 2 15 Graphics Processor PCB 16 Hard Disk PCB A18 Rear Panel Interface Rear Panel Assembly Front Panel Assembly Floppy Disk Assembly A24 VME Bus Terminator PCB A9 Main Processor Themajor components that comprise the A9 Main Processor PCB 373XXA MM PCB Assembly a a 68040 Microprocessor w integrated co processor This is the CPU for the 372XXB system 4MB DRAM This is the main system memory This memory is volatile non battery backed During normal operation it stores the 372 software that is loaded from disk at power up 8KB BBRAM This auxiliary memory chip contains a back up battery that is continuously recharged whenever power is ap plied The back up battery has a four year minimum life span This chip also contains real time and
127. e Power Amplifier as sembly to the test set tray Remove the two screws that fas tens the assembly feet to the Buffer Amplifier Sampler as sembly Step 4 Disconnect the Power Amplifier from the Buffer Amplifier Sampler by carefully pulling up on the connector end of the rigid coaxial line from the Power Amplifier See Figure 8 13 Carefully lift the assembly from the Test Set Module replace the Power Amplifier assembly perform the steps above in the reverse order 373 XXA REMOVE AND REPLACE TEST SET MODULE ASSEMBLIES Output Connector Power Cable Power Amp In Cable 41 Power Amp Assy P O Buff Amp Sampler A31 Rigid Coax Line Figure 8 13 A41 Power Amplifier Assembly Details Buffer Amplifier Use the following procedure to remove replace the Buffer Amplifier Sampler A31 Sampler assemblies of all models Preliminary Remove the Power Amplifier assembly see previous paragraph Procedure Step 1 Disconnect the semi rigid coaxial lines W83 and W84 from the 20 dB pads that are part of the Buffer Amplifier Sampler assembly see Figure 8 14 For units with Option 11 the semi rigid coaxial lines are W46 and W47 Step 2 Disconnect the cables from connectors J 1 through J 7 of the A31 Buffer Amplifier Sampler assembly Pull up gently to disconnect N ote that the connector end of each cable 15 marked with
128. e aa i 3 5 SELF TE ST S79 neat dr funk ee er fe D 3 5 Self TestError Codes 5 11 SERVICE CENTERS r w ann n nn n 1 9 servicelog ss ttt ttt tt ee B 3 Service Log 3 3 3 3 4 5 12 Service Log Error Messages B 3 Service Log Snap Shot Data 5 12 Service Software pale eh CR 1 7 SERVICE STRATEGY pa Vres sae Eia 1 5 SERVICE SUPPORT 1 6 1 8 Servicing Specially Modified Instruments 1 6 SIGNAL PATH u usc Gul ae Ct Cade Tar Roe 28 3 10 Signal Source Module 2 7 7 Signal Source Module RF Microwave Components 2 6 Signal Source Parts Location Diagram 2 10 Signal Source Phase Lock Loop Assemblies 5 17 Signal Source Problems 5 17 Signal Source Test Set Module Error 5 18 Signal Source Test Set Problems Introduction to Braga ME 5 18 SOURCE LOCK THRESHOLD 6 11 6 12 SOURCE TEST SET RECEIVER 5 17 5 20 5 lt 5 5 4 3 Special Precautions 3372 4 4 Specifications Performance 1 1 Standard Conditions 4 3 STANDARD OPTIONS 2 1 4 Start Self Test RC RM ERU E rr A 3 STATIC SENSITIVE COMPONENT HANDLING PROCEDURES 5 dar SG OR ie
129. e appropriate ANRITSU Verification Kit The Standard Con ditions and Special Precautions described in paragraph 4 2 should be observed when performing these procedures The appropriate ANRITSU Verification Kit to be used for performing these procedures is model dependent as follows Models 37317A and below with Opt 7A Verification Kit 3667 All Models using Connector test ports Verification Kit 3668 Models 37397A Verification Kit 3669B The impedance transfer standards contained in these kits are 20 dB Attenuation Standard 50 dB Attenuation Standard 50 Ohm Air Line Standard 25 Ohm Mismatch Beatty Standard Oooo The verification software performs the following functions It guides the user through a full 12 Term calibration of the 373XXA It guides the user through the measurement of the S parameters of the NIST traceable impedance transfer standards below It verifies the measured values are within the specified measure ment uncertainty limits It indicates the pass fail status of the measurements on the CRT display It can also provide a hard copy printout of the measured Traceability to the U S National Institute of Standards and Technology NIST 4 4 373XXA MM PERFORMANCE VERIFICATION VERIFICATION PROCEDURE data measurement uncertainties and the impedance transfer stan dards used NOTE The total verification uncertainty in these 373XXA measurements includes the me
130. e fault could be in the Receiver Module Signal Source Module or Test Set Module If the problem occurs in both directions at only certain frequencies the fault could bein the Signal Source Module If the problem occurs in only one direction the fault could the TEST SETMODULE Step 4 Run the 37XXX Test Software 2300 178 program to verify operation of the Buffer Amplifier Al LO1 PCB A2 LO2 PCB and Source control PCB Use the information obtained in steps 1 4 above to determine whether the failure occurs the Source Module Test Module or Re ceiver Module Replace the suspected failed assembly and perform any required adjustment s Then retest If the 373XXA still fails contact ANRITSU Customer Service Center for further assistance NOTE To obtain technical service support from your nearest ANRITSU Customer Service Center refer to Paragraph 1 8 Service Support I nformation If you have determined that the failure occurs in both sweep direc tions only at certain frequencies and that Error Code 5110 is re corded in the Service Log use the following procedures to determine which assembly may have failed Step 1 Set the 373XXA Start and Stop frequencies for the follow ing bands Band Start Stop 1 22 5 40 MHz 2 0 GHz 2 2 0 GHz Upper band edge frequency for model 20 GHz for 37369A 3 20 0 GHz 40 0 GHz for Model 37369A only Models 37311A and 37317A Step 2 If the pr
131. e functioning correctly the cables are in good condition and all connections are secure Verify the correct power sensor data exists in the power meter Notethe failed step in the calibration procedure from the screen messages Repeat calibration If it still fails then proceed to Chapter 5 Troubleshooting 6 6 SOURCE LOCK This procedure uses the 373XXA internal diagnostics and calibration THRESHOLD menus to adjust the source lock threshold of the phase lock loop Per form this calibation procedure if TheA4 PCB is replaced BBRAM chip on 9 Processor PCB is replaced and the Source Lock Threshold Calibration data was not previously saved on disk that is data is not available for recall from a floppy disk Calibration Perform the following steps Procedure 373XXA MM 6 11 SOURCE LOCK THRESHOLD ADJUSTMENTS Post Calibration Actions 6 12 Equipment Required None NOTE Allow the 373XXA to warm up at least 30 minutes prior to performing calibration and perform the ALC calibration paragraph 6 3 before doing this calibration Procedure Step 1 recalibrating a 37397A install broadband terminations to both ports or install a throughline between ports Step 2 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu Step 3 Select DIAGNOSTICS from menu Then select in se quence H W CALIBRATIONS then SOURCE THRESH OLD CALIBRATION Step 4 Follow the directio
132. e range Re enter values that are within range OUT OF RANGE Entered value is out of range Re enter values that are within range RECEIVER OUT OF RANGE BY EQUATION Equation defined in Multiple Source mode places receiver frequency out of range when attempting to store band Redefine frequency SOURCE 1 OUT OF RANGE BY EQUATION Equation defined in Multiple Source mode places Source 1 frequency out of range when attempting to store band Redefine frequency SOURCE 2 OUT OF RANGE BY EQUATION Equation defined in Multiple Source mode places Source 2 frequency out of range when attempting to store band Redefine frequency 373XXA MM B 5 SERVICE LOG ERROR MESSAGES Table B 1 Operational Error Messages 2 of 2 APPENDIX B Error Message Description Corrective Action STANDARD CAL NOT VALID FOR WAVEGUIDE Cannot use the standard method when calibrating with waveguide Use the Offset Short method with waveguide START F FOLLOWS PREVIOUS STOP F Start frequency of current band imme diately follows stop frequency of previ ous band Cannot be modified None START MUST BE LESS THAN STOP Entered start frequency is greater than the stop frequency Re enter frequency values such that the start frequency is lower than the stop frequency STEP IS TOO LARGE Entered harmonic frequency extends the stop out of range Re enter so that harmonic fr
133. e to store a label in the database Calibration step failure An error occurred while waiting for completion of a data collection sequence in calibra tion 373XXA MM B 15 SERVICE LOG ERROR MESSAGES Table B 4 Service Log Error Messages 1 of 3 APPENDIX B 0000 INFORMATIONAL MESSAGE 0511 ATO D COMM FAIL 0000 SELF TEST INFO MESSAGE 0512 ATO D 8 BIT D TOA FAIL 0094 PRNT INTERFACE TEST PASSED 0513 A TO D 12 BIT A TO D FAIL 0095 PRNT INTERFACE TEST FAILED 0514 A TO D STEERING DAC FAIL 0096 GPIB INTERFACE TEST PASSED 0515 A TO D CONV ACCURACY FAIL 0097 GPIB INTERFACE TEST FAILED 0516 A TO D SAMPL HOLD FAIL 0098 SELF TEST PASSED 0517 IF SYNC FAIL 0099 SELF TEST FAILED 0518 PWR SUPPLY SYNC FAIL 0111 LO1 COMM FAIL 0519 A TO D EXT ANAL OUTP FAIL 0112 LO1 PRE TUNE DAC FAIL 0520 PWR SUPPLY 5V FAIL 0113 LO1 PHS LCK IND FAIL 0521 PWR SUPPLY 9V FAIL 0114 PHS LCK ERR VOL OUT OF TOL 0522 PWR SUPPLY 12V FAIL 0115 LO1 LCK TIME FAIL 0524 PWR SUPPLY 18V FAIL 0211 LO2 COMM FAIL 0525 PWR SUPPLY 18V FAIL 0212 LO2 MAIN PREST DAC FAIL 0526 PWR SUPPLY 27V FAIL 0213 LO2 OFFS PREST DAC FAIL 0527 PWR SUPPLY 27V FAIL 0214 MAIN PHS LCK ERR VOL FAIL 0611 TB IF COMM FAIL 0215 OFFST PHS LCK ERR VOL FAIL 0612 TB IF 10V REF FAIL 0216 DDS PHS LCK ERR VOL FAIL 0613 TB IF LEVEL STATUS FAIL 0217 MAIN PHS LCK IND FAI
134. edure name An attempt was made to allocate some temporary memory in order to accomplish a task directed in the program message The procedure name is the place in the software where the error was detected Unable to release memory in a procedure name An attempt was made to return some temporary memory within a task and the return failed for some reason The procedure name is the place in the software where the error was detected Unable to get service error log An unsuccessful attempt was made to get a copy of the service or error log Unable to get calibration term An unsuccessful attempt was made to get a calibration term Unable to get raw or corrected data An unsuccessful attempt was made to get raw or corrected data Unable to get final data An unsuccessful attempt was made to get final data Unable to get setup or data An unsuccessful attempt was made to get the frequency list from the database Unable to get setup An unsuccessful attempt was made to get a front panel setup B 14 373XXA MM APPENDIX SERVICE LOG ERROR MESSAGES Table B 3 GPIB Reated Error Messages 8 of 8 Error Message Description Unable to store setup An unsuccessful attempt was made to save a front panel setup Unable to get frequency list An unsuccessful attempt was made to get setup trace or tabular datat from the data base Unable to store label An unsuccessful attempt was mad
135. elow and Model SC6230 to 65 GHz Power Sensors Gauging Set GPC 7 Gauging Set ANRITSU 01 161 O T USE CODES Quo Adjustment Internal Hardware Calibration Operational Testing Performance Verification Troubleshooting 373XXA MM STATIC HANDLING GENERAL INFORMATION 1 touch exposed contacts 2 Do not slide static sensitive compo 3 not handle static sensitive com any static sensitive component nent across any surface ponents in areas where the floor or work surface covering is capable of generating a static charge ATTENTION Static Sensitive Devices Handie Only at Static Safe Work Stations Reusable Container Do Not Destroy 4 Weara static discharge wristband 5 Label all static sensitive devices 6 Keep component leads shorted to when working with static sensitive gether whenever possible components 7 Handle PCBs only by their edges 8 Lift amp handle solid state devices by 9 Transport and store PCBs and Do not handle by the edge connec their bodies never by their leads other static sensitive devices in tors static shielded containers 10 ADDITIONAL PRECAUTIONS e Keep workspaces clean and free of any objects capable of holding or storing a static charge e Connect soldering tools to an earth ground e Use only special anti static suction or wick type desoldering tools Figure 1 2 Static Sensitive Component Handling Procedures 1 12 373XXA MM
136. em with RF Power accuracy or the ALC loop a Any of the following assemblies are replaced A21A1 Source YIG Bias A21A2 Source Controller Down Converter YIG Oscillator Switched Filter Transfer Switch SDM 37369A Coupler 37325A and above Bridge 37317A and below Port 1 Source Step Attenuator Buffer Amplifier BBRAM chip on the A9 Processor PCB is replaced and the Source Calibration Data was not previously saved on disk thus data could not be recalled from disk 6 8 373XXA MM ADJUSTMENTS 373XXA MM Calibration Procedure POWER ALC CALIBRATION Perform the following steps Equipment Required Refer to Table 1 1 located on page 1 9 for further information about the following equipment HP 437B Power Meter with HP 8487A Power Sensor or ANRITSU ML24XXA with Version 2 02 or later with ANRITSU Power Sensors MA2474A and SC6230 for 50 and 65 GHz units Gigatronics 8541 8542 with 80304A Power Sensor GPIB cable WILTRON 2100 2 or equivalent NOTE Allow the 373XXA and power meter to warm up at least 30 minutes prior to performing calibration 65 GHz Power Sensor Setup Procedure The Anritsu SC6230 Power Sensor has an internal frequency calibra tion factors table The ML24XX meter settings must be changed so that the table will be used for frequencies above 50 GHz To configure the meter for the new calibration factors table proceed as follows Step 1 Press the Sensor key t
137. emories for storage and retrieval of data and front panel setup information The 373XXA implements an IEEE 488 2 interface This GPIB inter face allows an externally connected instrument controller to control the 373XXA system in the Remote Only mode All 373XXA measure ment and input output operations may be controlled remotely in this mode SYSTEM OVERVIEW SYSTEM DESCRIPTION An internal service log 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 7 4 373 SYSTEM DESCRIPTION FP Amp Loop 54 Loop aq Loop 0 70dB TEST SET MODULE Step Attenuator EXTERNAL PORTI OE KEYBOARD i QUAD Rl I o 8 ES SAMPLER BUFFER IF SYNC DET FLTR S H A D MAIN PROCESSOR
138. equency is within range STOP IS OVER RANGE Entered value exceeds the instru ment s stop frequency Re enter stop frequency SYSTEM NOT CALIBRATED 373XXA is uncalibrated for the se lected measurement values Perform a measurement calibration TOO FEW POINTS 2 MINIMUM Entered too few discrete fill points 2 is minimum Re enter data points TOO MANY POINTS 1601 MAXI MUM Entered too many discrete fill points 1601 points are the maximum al lowed Re enter data points UNDEFINED DIVIDE BY ZERO Denominator cannot be zero in equa tion Make denominator a value other than zero WINDOW TOO SMALL Attempted to set time domain range smaller than allowed Re enter larger time range OUT OF WINDOW RANGE Attempted to set time domain range larger than allowed Re enter values within allowed range 373XXA MM APPENDIX SERVICE LOG ERROR MESSAGES Table B 2 Disk Related Error Messages 1 of 1 Error Message Description Corrective Action 7140 GENERAL FLOPPY DRIVE FAIL Invalid disk media or format Use 1 44 MB diskette and or format in the 373XXA 7142 FLOPPY DISK READ ERROR Read error when accessing disk file Use 1 44 MB diskette and or format in the 373XXA 7143 FLOPPY DISK WRITE ERROR Error in writing to disk file Use 1 44 MB diskette and or format in the 373XXA 7147 FLOPPY DISK UNAVAILABLE Floppy disk is n
139. er remove the standoffs that fasten the IEEE 488 2 GPIB and Dedicated GPIB connectors to the rear panel Step 6 Using a X in nut driver remove the standoffs that fasten the Printer Out VGA Out and External IO connectors to the rear panel Set standoffs aside for re use Step 7 Carefully separate the 18 PCB from panel To replace the A18 Rear Panel PCB assembly perform the steps above in the reverse order 373XXA MM REMOVE AND REPLACE A18 REAR PANEL PCB A REFA Geseses essees senses TEST 1 W132 A32 W141 5 XFER SW Signal Source Module ve me LS un Output Connector wee W123 BOTTOM Input Connector INSET A XFER SWITCH DETAIL Figure 8 11 Test Module Components Layout Diagram for Models 37325A and Bdow 373XXA MM 8 23 18 REAR PANEL PCB REMOVE AND REPLACE Figure 8 12 Test Module Components Layout Diagram for Mode 37369A with Options 6 and 11 8 24 373XXA MM REMOVE AND REPLACE TEST SET MODULE ASSEMBLIES 8 16 TEST SET MODULE The following paragraphs provide instructions for removing and re ASSEMBLIES placing the RF microwave components that comprise the Test Set Module Equipment Required Connector torque wrench 34 ANRITSU Model 01 201 equivalent Open end wrench 1
140. es are available for each trace Single Limit Readouts Interpolation algorithm deter mines the exact intersection frequencies of test data and limit lines Segmented Limit Lines A total of 20 segments 10 up per and 10 lower can be generated per data trace Com plete segmented traces can be offset in both frequency and amplitude Test Limits Both single and segmented limits can be used for PASS FAIL testing The active channel s PASS or FAIL status is indicated on CRT after each sweep In addi tion PASS FAIL status is output through the rear panel I O connector as selectable TTL levels 55 0 FAIL 5V or PASS 5V FAIL 0V Tune Mode Tune Mode optimizes sweep speed in tun ing applications by updating forward S parameters more frequently than reverse ones This mode allows the user to select the ratio of forward sweeps to reverse sweeps after a full 12 term calibration The ratio of forward sweeps to reverse sweeps can be set anywhere between 1 1 to 10 000 1 DISPLAY CAPABILITIES Display Channels Four each of which can display any S parameter or user defined parameter in any format with up to two traces per channel for a maximum of eight traces simultaneously A single channel two channels 1 and 3 or 2 and 4 or all four channels can be displayed simulta neously Channels 1 and 3 or channels 2 and 4 can be overlaid LCD Color 8 5 inch diagonal Trace Color The color of display traces memory text markers and
141. et M odule 373XXA MM 8 25 TEST SET MODULE ASSEMBLIES 8 26 Input Coupler s Low Freq Bridge s Power Amplifier REMOVE AND REPLACE To replace the Transfer Switch assembly perform the steps above in the reverse order W111 for Models 37211B and 37217B Use the following procedure to remove replace the Input Coupler s of all models 37225B through 37269B and the Low Frequency Bridges of models 37211B and 37217B Procedure Step 1 Using alin open end wrench remove the front panel nut and washer of the Portlor Port2 coupler bridge that is to be removed Step 2 Disconnect the two semi rigid coaxial lines associated with the coupler bridge see Figure 8 11 Step 3 Remove the two screws that fasten the coupler bridge bracket to the test set tray Move coupler bridge to the rear and up to remove it from the Test Set M odule replace the coupler bridge perform the steps above in the reverse order Usethe following procedure to remove replace the Power Amplifier as sembly which is common to all373XXA models Procedure Step 1 Disconnect the Power Amplifier power cable at connector J 5 of the A17 Motherboard PCB Free the cable by separat ing it from the cable harness and by temporarily removing the A24 VME Terminator PCB Step 2 Disconnect the PWR AMP IN cable on the side of the Power Amplifier assembly see Figure 8 13 Pull out gently to dis connect Step 3 Remove the two screws that fasten th
142. etwork analyzer Address can be set from the front panel and can range from 1 to 30 Interface Function Codes SH1 AH1 6 L4 LEO SR1 RL1 PP1 DT1 DCO CO Dedicated GPIB Connects to external peripherals for network analyzer controlled operations e g GPIB plotters frequency counters frequency synthesizers and power meters GPIB Data Transfer Formats _ ASCII 32 bit floating point or 64 bit floating point 32 bit and 64 bit floating point data can be transferred with LSB or MSB first GPIB DATA COLLECTION SUMMARY This section summarizes typical data collection times for automated measurements using the 37XXX IEEE 488 2 GPIB bus Throughput measurements for both tables were made as follows start the timer trigger a sweep wait for a full sweep transfer data across the GPIB and stop the timer Data throughput times are shown separately for measurements made without calibration and with full two port 12 term calibration Data Transfer Speed with or without cal second Measurement conditions 40 MHz to 20 GHz sweep single channel log magnitude display 10 kHz IF band width and output final data 150 kbytes 373 MM APPENDIX Throughput Times ms without Correction typical Data Format Points 101 Points 401 Points 1601 Points 32 Bit 230 650 1400 3600 64 Bit 230 680 1450 4000 ASCII 235 800 1700 5000 Throughput Times ms with Correction typical
143. ey Ensurethe system resets to back to the default Quad Channel display Refer to Chapter 5 Trouble shocting if it does not Recall the saved memory 1 setup as follows W Press the Save Recall Menu key B Select RECALL from menu bottom left then in se quence select FRONT SETUP IN INTERNAL MEMORY MEMORY SRAM Battery gt Figure 8 4 Location of SRAM Battery on the A9 PCB 8 11 24 VME BUS TERMINATOR PCB REMOVE AND REPLACE 8 7 A24 VME BUS This paragraph provides instructions for removing and replacing the TERMINATOR PCB A24VME Bus Terminator PCB assembly Preliminary Switch 373XXA power off Remove the power cord Remove bottom cover paragraph 8 3 Remove Replace Procedure Step 1 Place the 373XXA on its top bottom side up Step 2 Locate the A24 PCB assembly Figure 8 5 Unplug A24 PCB assembly from the 17 Motherboard PCB by gently pulling straight up on each side CAUTION Be careful not bend or disturb the hard lines located near right edge of A24 PCB 8 8 FRONT PANEL This paragraph provides instructions for removing and replacing the ASSEMBLY 373XXA Front Panel assembly A17 Motherboard A24 VME Bus Terminal PCB Assembly PCB Assembly x o Figure 8 5 L
144. f the 373XXA model being calibrated Perform this calibration procedure if The Source FM Lock Linearity test in Chapter Operational Test fails Other testing or troubleshooting reveals a possible problem with the signal source frequency accuracy or phase lock loop a Any of the following assemblies are replaced B A21A1 Source YIG Bias A21A2 Source Controller Down Converter 6 5 FREQUENCY CALIBRATION ADJUSTMENTS YIG Oscillator Switched Filter BBRAM chip on the A9 Processor PCB is replaced and the Source Calibration Data was not previously saved on disk thus data could not be recalled from disk Calibration Perform the following steps Procedure Equipment Required Refer to Table 1 1 located on page 1 9 for further information about the following equipment EIP Model 5788 Frequency Counter or equivalent RF Microwave Cable GPIB cable WILTRON 2100 2 or equivalent NOTE Allow the 373XXA and Frequency Counter to warm up at least 30 minutes prior to performing calibration Procedure 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 CALIBRATION and then SOURCE FREQUENCY CALIBRATION below OPTIONS DIAGNOSTICS HARDWARE CALIBRATIONS TRIGGERS START SELF TEST READ SERVICE LOG LO1 HARDWARE DIAGNOSTIC
145. face 15 functioning cor rectly 3 7 PERIPHERALS AND INTERFACES 3 8 OPERATIONAL TESTS Equipment Required Printer Test Fixture ANRITSU PN B39553 Procedure Step 1 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu Step 2 Select DIAGNOSTICS from menu then in sequence se lect PERIPHERAL TESTS and then PRINTER IN TERFACE See diagram below OPTIONS DIAGNOSTICS PERIPHERAL TESTS TRIGGERS START SELF TEST CRT DISPLAY REAR PANEL READ SERVICE LOG FRONT PANEL OUTPUT INSTALLED OPTIONS EXTERNAL KEY DIAGNOSTICS PERIPHERAL TESTS BOARD MULTIPLE SOURCE TROUBLES GONG PRINTER INTERFACE FOR SERVICE GPIB INTERFACE PRESS ENTER TO NLY PREVIOUS MENU SELECT HW CALIBRATIONS FOR SERVICE PRESS ENTER TO NLY SELECT PRESS ENTER TO SELECT Step 3 Follow instructions on the screen until test is completed If test fails proceed to Chapter 5 Troubleshooting 373XXA MM OPERATIONAL TESTS PERIPHERALS AND INTERFACES GPIB Interface Test This test verifies that the 373XXA printer interface is functioning cor rectly Equipment Required GPIB cable ANRITSU PN 2100 2 or equivalent CAUTION Insure that no other cables are connected to either of the two rear panel GPIB ports when performing this test Procedure Step 1 Pressthe Option Menu key Enhancement key group to dis play the OPTIONS menu Step2 Select DIAGNOSTICS from menu
146. fer Switch The stimulus signal is output to the DUT via directional couplers mounted directly to the Port 1 and Port 2 front panel connectors Note that bridges are used instead of couplers in RF Models 37211B and 37217B 373XXA MM SYSTEM DESCRIPTION ANALOG SUBSYSTEM ASSEMBLIES Each output circuit path from the Transfer Switch contains a splitter One path from each splitter goes to the associated directional coupler Port 1 Port 2 and the other path feeds the associated Reference in put of the Receiver Module RA RB via a level detector The output generated by the two parallel configured level detectors is a DC signal that corresponds to the output level of the stimulus signal This signal is the input signal for the ALC circuits located in the signal source module Only the detector in the currently selected sweep direction ac tually generates the ALC control signal The Test Set simultaneously receives the reflected and transmitted de vice under test DUT signals via the Port 1 Port 2 directional cou plers These two test signals along with a sample of the output RF stimulus Reference signal are sent to the Receiver Module The al Reference signal is routed out of and back into the 373XXA via extension loop located on the rear panel This allows for injection of user supplied signals in lieu of internal signals A7PCB 10 MHz Except for units equipped with Option 10 or 10A the A7 PCB contains Timebase the 10
147. gnals below 270 MHz are passed directly through the four harmonic samplers to the second stage without down conversion The drive signal to each of the harmonic samplers is a comb of harmonics generated by a step recov ery diode SRD The Power Amplifier provides the signal that drives the SRD Thein put to the Power Amplifier is the 357 536 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 stage of the Receiver Module uses the 25 0 272 5 MHz signal from the A2 Second Local Oscillator LO2 PCB to down convert the 89 MHz signals into four 2 5 MHz IF signals TA TB RA RB two test signals and two reference signals Either the Reference A or the Reference B IF signal is selected as is appropriate for Forward Re verse operation The resultant three 2 5 MHz IF signals Test A Test B and Reference are output to the IF Section A buffered version of the Reference signal is also fed to the A8 Source Lock Signal Separation Control PCB as the Source Lock signal The Receiver Module can also select the Reference A IF signal that is output tothelF Section via the Test A switch path This IF signal is used during Line Reflect Line LRL Calibrations to ratio the Refer enceA and Reference B signals 7 10 373XXA MM SYSTEM DESCRIPTION A8 Source Lock Signal Separation 373XXA M
148. gnificantly with time the system verification procedures should be performed more often than the recommended annual cyde Thestandard conditions specified below must be observed when perform ing any of the operations in this chapter both during calibration and during measurement Warm up Time One hour minimum Environmental Conditions Temperature 23 47 3 deg C Relative Humidity 20 5096 recommended 4 3 MEASUREMENT ACCURACY Special Precautions 4 3 MEASUREMENT ACCURACY Verification Software PERFORMANCE VERIFICATION Error Correction Perform software guided 12 term calibration When performing the procedures in this chapter observe the following precautions Q Minimize vibration and movement of system and attached compo nents and through cable Clean and check pin depth and condition of all adapters through cable s and calibration components Preshape the through cable s so as to minimize its movement dur ing calibration and measurement activities Ensurethe system remains motion free in stable environmental conditions as defined above throughout warm up calibration and measurement activities The verification procedures described in the following paragraphs verify the published measurement accuracy and measurement traceability for the 373XXA These procedures usethe ANRITSU VNA Verification Software PN 2300 237 and the NIST traceable impedance transfer standards con tained in th
149. gured to measure the relative harmonic level of test devices with Set On Receiver Mode capability The 373XXA s unique D 5 PERFORMANCE SPECIFICATIONS LOG MAG Ref 0dBm 5dB DIV Typical 1 22 5 MHz 8 6 GHz Model 37317A Port 1 Power LOG MAG Ref 7 dBm 5dB DIV 40 MHz 20 GHz Model 37325A and 37347A Port 1 Power LOG MAG 7 dBm 5dB DIV Available Power gt Typical 40 2 40 GHz Model 37369A Port 1 Power APPENDIX D LOG MAG Ref 7 dBm 5dB DIV Available T r 40 MHz 65 GHz Model 37397A Port 1 Power D 6 phase locking scheme allows it to operate as a tuned re ceiver by locking all of its local oscillators to its internal crystal reference oscillator Set On Receiver Mode capabil ity significantly increases the versatility of the 373XXA VNA in applications that check for harmonics intermodulation products and signals of known frequency Dual Source Control Capability Dual Source Control capability allows a user to independently control the fre quencies of two sources and the receiver without the need for an external controller The frequency ranges and output powers of the two sources may be specified A frequency sweep may be com
150. hat the control keys in each of the 373XXA key groups are functioning correctly Procedure Step 1 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu Step 2 Select DIAGNOSTICS from menu then in sequence se lec PERIPHERAL TESTS and then FRONT PANEL See diagram below OPTIONS DIAGNOSTICS PERIPHERAL TESTS TRIGGERS START SELF TEST CRT DISPLAY REAR PANEL READ SERVICE LOG FRONT PANEL DIAGNOSTICS INSTALLED OPTIONS EXTERNAL KEY MIELE S 7777 PERIPHERAL TESTS BOARD CONTROL TROUBLESHOOTING PRINTER INTERFACE ONLY CE GPIB INTERFACE PRESS lt ENTER gt TO PREVIOUS MENU SELECT HW CALIBRATIONS EOR SERVICE PRESS lt ENTER gt TO NLY SELECT PRESS lt ENTER gt TO SELECT Follow instructions on the screen until test is completed Step 3 If test fails proceed to Chapter 5 Troubleshooting This test verifies that the 373XXA external keyboard interface is func tioning correctly Equipment Required An compatible keyboard is required for this test Procedure Step 1 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu Step 2 Select DIAGNOSTICS from menu then in sequence se lect PERIPHERAL TESTS and then EXTERNAL KEY BOARD See diagram above Step 3 Follow instructions on the screen until test is completed If test fails proceed to Chapter 5 Troubleshooting This test verifies that the 373XXA printer inter
151. hen Cal Factor softkey Step 2 Press the More softkey Step 3 Press the Use Table sofkey Cursor will start blinking Step 4 Press 1 then the Enter softkey Step 5 Press the System key to exit Procedure Step 1 Press the Option Menu key Enhancement key group to display the OPTIONS menu Step 2 Select DIAGNOSTICS from menu then select in se 6 9 POWER ALC CALIBRATION ADJUSTMENTS ANRITSU 373XXA Dedicated GPIB VNA m n ANRITSU ML24XXA 80 33333 Power Meter alooollo ol M ES ou oe S22 C 3 L 007 75 a gt a gt 5 6230 Sensor Figure 6 2 Equipment S amp U p for RF Power ALC Calibration quence H W CALIBRATIONS and then SOURCE ALC CALIBRATION below 6 10 OPTIONS DIAGNOSTICS HARDWARE HARDWARE CALIBRATIONS CALIBRATIONS TRIGGERS START SELF TEST FOR SERVICE FOR SERVICE PREIS er READ SERVICE LOG LO1 START SOURCE DIAGNOSTICS E CALIBRATION FREQ CALIBRATION MULTIPLE SOURCE LO2 PREVIOUS MENU CONTROL TROUBLESHOOTING CALIBRATION EOS SERVICE SOURCE FREQUENCY Set Up PRESS ENTER TO 19 2 ae gt SOURCE ALC ONLY ERE CALIBRATION PRESS ENTER TO DISK OPEHATIONS SELECT PREVIOUS MENU PRESS ENTER TO SELECT Step 3
152. ial lines from connector J 6 top and connector J lower front of the Switched F ilter assembly Step 3 Disconnect the semi rigid coaxial line from the RF INPUT top connector of the Down Converter assembly Step 4 Remove the two screws that fasten the Switched Filter as sembly to the source module chassis and lift the assembly from the Signal Source Module Step 5 Disconnect the semi rigid coaxial line from connector J 1 bottom of the Switched Filter assembly Put this coaxial line aside for re use NOTE When replacing the Switched Filter assembly connect the semi rigid coaxial line to the bottom connector J 1 before attaching the assembly to the Signal Source Module To replace the Switched Filter assembly perform the steps above in the reverse order Down Converter Use the following procedure to remove replace the Down Converter Assembly assembly Procedure Step 1 Disconnect the power cable from connector 1 at the front of the Down Converter assembly 373XXA MM 8 33 SIGNAL SOURCE MODULES YIG Oscillator Assembly 8 34 Step 2 Step 3 REMOVE AND REPLACE Disconnect the semi rigid coaxial lines from the RF INPUT connector and RF OUTPUT connector of the Down Con verter assembly Remove the two screws that fasten the Down Converter as sembly to the source module chassis and lift the assembly from the Signal Source Module To replace the Down Converter assembly perform the steps above i
153. ic Range as described in the next paragraph Thefollowing paragraphs describe procedures for automated measure ment of the key system performance parameters listed below Measure ment of these parameters is not required for system verification however itis highly recommended to ensure that the complete 373XXA measure ment environment is stable and capable of supporting accurate measure ments Effective Source Match Effective Directivity System Dynamic Range Frequency Accuracy D DO O Power Level Accuracy As with the verification procedures the quality of the measurement of the system performance parameters listed above is very dependent on the measurement environment The complete 373XXA measurement environment consists of Condition and stability of the test ports through cable and calibra tion kit mating connectors Settings and stability of the surrounding environment especially temperature humidity and vibration To maintain the highest sys tem performance avoid changing these conditions especially tem 373XXA MM PERFORMANCE VERIFICATION KEY SYSTEM PARAMETERS perature during warm up calibration and when making measure ments on your DUT Q Theuse of proper microwave connector mating techniques Measurement Themeasurements of the key system performance parameters are per Technique formed using the ANRITSU 37XXX Test Software PN 2300 178 NOTE The Standard Conditions and Specia
154. ieve o HX CAL ae i 1 1 INT i 80KHz 1 1 5 10 MHz 1 1 A i i i 25 0 272 5MHz f 1 Quiet Bus from A14 101 i 1Hz RES D A Low Frequency Bridges for Models 37211A 8 37217A 3248 From A1 A8 and A21A1 A21A2 PCBs 1 t Diagnostic Measurement 10 MHz 10 gt 20 Quiet Bus from A14 PCB 207 403MHz 197 394M J 2 1MHz RES 53 1Hz RES Low Frequency Bridges for Models 37311A and 37317A NA 357 536 5MHz 1 From A1 A8 and A21A1 A21A2 PCBs SOME RES 27 oy Diagnostic Measurement 2 K 9 BOS 1 1 m EE 1 E nco 910 2 METUS 2 AB 8 For Models 37377A and 37397A see Figures 5 3 and 5 4 372XX17 CDR Figure 7 2 Analog Subsystem Block Diagram 7 6 373 XXA MM SYSTEM DESCRIPTION 7 3 ANALOG SUBSYSTEM ASSEMBLIES Signal Source Module 373XXA MM ANALOG SUBSYSTEM ASSEMBLIES The following paragraphs briefly describe the major assemblies that com prise the 373XXA Analog Subsystem Descriptions of the functions per formed by each assembly are also ind uded The Signal Source Module consists of the items listed below refer to the block diagram of the Anal
155. in CAUTION Throughout these procedures always use the 5 in con nector torque wrench for connecting the Test Set Module semi rigid coaxial lines and RF microwave components Use of improper tools may damage the connectors result ing in degraded instrument performance Preliminary Switch373XXA power off Remove the power cord Remove all covers paragraph 8 3 Transfer Switch Use the following procedure to remove replace the Transfer Switch which is common to all 373XXA models Procedure Step 1 For all models except 37269B disconnect the semi rigid co axial line W87 from the input connector of the Transfer Switch See Figure 8 11 For Model 37269B loosen the two screws that fasten the Transfer Switch mounting plate to the test set tray before disconnecting the semi rigid coaxial line W80 See Fig ure 8 12 Step 2 Disconnect the Transfer switch Step 3 Carefully flex do not bend the rigid coaxial lines to gain access to the lower connectors of the Transfer Switch see Inset A on Figure 8 11 Remove rigid coaxial lines from these connectors Step 4 Disconnect the Transfer Switch power cable at connector J 5 of the A17 Motherboard PCB Free the cable by separating it from the cable harness and by temporarily removing the A24 VME Terminator PCB Step 5 Remove the two screws that fasten the Transfer Switch mounting plate to the test set tray and lift the Transfer Switch assembly from the Test S
156. ine voltage NOTE The 373XXA is designed to automatically sense and operate with AC power line volt ages in the range of 85 240 VAC with a frequency of 48 63 Hz 540 VA maximum Verify that the power input cord is in good condition ensure that the system power linefuse is installed that it is not open and that it is the correct value 8 A Slow Blow Verify that the 373XXA power supply voltages are correct as follows Step 1 Press the 373XXA Power key off and and disconnect the power input cord from the 373XXA ensure all external con nections to the system front and rear panel are also discon nected 373XXA MM TROUBLESHOOTING SYSTEM DOES NOT POWER UP Step 2 Remove bottom panel and lay the system down on its left monitor side Refer to Chapter 8 Remove and Replace Procedures Step 3 Reconnect the power line input cord to the system and Press the 373XXA Power key on Step 4 Using a DMM or an oscilloscope measure the DC power supply voltages listed in Table 5 1 Connect the DM M oscilloscope to the top of the cable connectors at J 13 and J 4 on the Motherboard A17 Refer to Figure 5 1 and Table 5 1 Table 5 1 373XXA DC Power Supply Voltage Checks DC Supply Voltage ana Conn Com Pin Meas Pin Noise J13 8 16 0 Vdc 50 mVpp J13 8 1 4 8 1 0 50 mVpp 4 1 9 596 0 100 mVpp J4 4 6 18 10 0 10
157. ing procedures in this chapter 1 Select the paragraph heading starting with paragraph 5 4 that best describes the nature of the 373XXA VNA system fault Refer to the Table of Contents page 2 Perform the procedure contained in the selected paragraph In general the steps within each procedure should be followed in the order presented 3 When removing and replacing the various assemblies and compo nents specified by the troubleshooting procedures in this chapter refer to Chapter 8 Remove and Replace Procedures as necessary 4 Ifa step cannot be successfully completed stop correct the imme diate problem and then continue on to the next step until all the appropriate steps in the procedure are completed 5 After troubleshooting and correcting a problem perform the pro cedures in Chapter 3 Operational Tests and Chapter 4 Perfor mance Verification as appropriate This should be done to insure that the system has been fully and correctly restored to proper op eration The procedures described in this chapter provide a general approach to troubleshooting 373XXA VNA problems They are particularly use ful for problems where the 373XXA is only partially functional The In ternal Diagnostic Menus described in Appendix A are very useful for evaluating 373XXA system performance They may be used alone or in conjunction with the procedures in this chapter Please ensure you have read and fully understand the servicing con
158. ing that corresponds to the test that failed If the CRT Display Test failed troubleshoot as follows Step 1 Replace the CRT Monitor Assembly Step 2 Perform the CRT Monitor Test again if fail replace the A15 Graphics Processor PCB 5 21 MEASUREMENT IN QUESTION Front Panel Test Exter Printer GPIB Interface Test Failures nal Keyboard Interface Test Failures Interface Test Failures Failures 5 9 MEASUREMENT IN 5 22 QUESTION TROUBLESHOOTING Step 3 Perform the CRT Monitor Test again if fail contact ANRITSU Customer Service Center If the Front Panel Test failed troubleshoot as follows Step 1 Replace the Front Panel Assembly Step 2 Perform the Front Panel Test again if fail replace the A14 PCB Step 3 Perform the Front Panel Test again if fail contact ANRITSU Customer Service Center If the External Keyboard Interface Test failed troubleshoot as follows Step 1 Replacethe A18 Rear Panel PCB Step 2 Perform the External Keyboard Interface Test again if fail replace the 13 O 1 PCB Step 3 Perform the External K eyboard Interface Test again if fail contact ANRITSU Customer Service Center If the Printer Interface Test failed troubleshoot as follows Step 1 Replace A18 Rear Panel PCB Step 2 Perform the Printer nterface Test again if fail replace the A13 O 1 PCB Step 3 Perform the Printer Interface Test again if fail contact A
159. io measurement sys tems used to measure complex vector signal characteristics real imagi nary magnitude phase etc of devices and systems in the 22 5 MHz to 65 GHz frequency range The 373XXA performs these measurements by sourcing a stimulus sig nal tothe Device Under Test DUT that is connected to the front panel Port 1 and or Port2 connectors See Figure 7 1 on page 7 5 It simultaneously measures the DUT response which consists of re flected and or transmitted attenuated or amplified signals at the connectors of the DUT The reflected and or transmitted signal s and a sample of the stimulus signal are down converted and then trans formed into their real and imaginary vector components The resul tant vector components are measured and converted into digital infor mation This digital information is sent tothe Main Processor PCB where the desired S parameter data is normalized and then presented tothe user via the front panel color display The display information is also sent to the rear panel VGA Out connector for use with an external VGA monitor The normalized measurement information is also sent to the rear panel Printer Out connector for use with an external printer and or plotter A front panel keypad a rotary knob and compatible keyboard interface provide user interaction with 373XXA Main Processor PCB The system is equipped with internal hard disk and floppy disk drives and battery backed internal m
160. ion Corrective Action ATTENUATOR UNAVAILABLE Option 6 Port 2 Test Step Attenuator is not installed Install Option 6 Step Attenuator DIFFERENT H W SETUP RECALL ABORTED Model and or options is are different from the recalled setup Reconfigure system to duplicate the hardware setup that was used to store the saved data DIFFERENT S W VERSION RECALL ABORTED Saved state not compatible with soft ware version or options Load compatible software S W ver sion and retry FREQUENCIES HAVE REACHED UPPER LIMIT Frequencies being defined in Multiple Source mode have reached upper lim its of Sources Redefine frequencies to not exceed limits of Sources MEMORY LOCATION CORRUPTED Requested memory location is cor rupted None If problem reoccurs after stor ing a new setup contact ANRITSU Customer Service NO BANDS ARE STORED No frequency bands have been de fined and stored Define and store frequency bands to turn on Multiple Source mode NO STORED MEMORY DATA No data is stored in memory for dis play or trace math Store or re save measurement data OPTION NOT INSTALLED Selected an option that is not in stalled None OUT OF CAL RANGE Entered values out of the selected calibration range Change calibration range or re enter values that are within the current range OUT OF H W RANGE Entered value is out of the instru ment s hardwar
161. l Precautions de scribed in paragraph 4 2 should be observed when per forming these measurements The software will use the following standards to determine system per formance values Q AssuranceAir Line Set Q Offset Termination Frequency Counter Q Power Meter Equipment requi red 37XXX Test Software ANRITSU PN 2300 178 External computer controller refer to Table 1 1 located on page 1 9 GPIB cable ANRITSU PN 2100 2 or equivalent Measurement Procedure Step 1 Refer to file Readme txt of the distribution disk for in formation regarding setup of the computer controller Step 2 Using the GPIB cable connect the external computer troller to the the 373XXA IEEE 488 2 GPIB rear panel con nector Step 3 Program may from floppy disk or copied to any folder in the computer and run from there Step 4 Follow the directions displayed on the computer screen to perform all tests NOTE Some tests require that the first test selected must be the 12 Term Calibration The software will guide you through this calibration If any tests fail refer to the Troubleshooting and Help se lections of the Test Software menu for assistance 373XXA MM 4 7 4 8 Chapter 5 Troubleshooting Table of Contents 5 1 5 2 5 3 5 4 5 5 5 6 5 7 5 9 INTRODUCTION 5 3 ASSOCIATED INFORMATION IN THIS MANUAL 5 3 RECOMMENDED TEST EQUIPMENT 5 4 SYSTEM
162. l Test Equipment required 37XXX Test Software ANRITSU PN 2300 178 External computer controller refer to Table 1 1 located on page 1 9 GPIB cable ANRITSU PN 2100 2 or equivalent Procedure Step 1 Refer to file Readme txt of the distribution disk for in formation regarding setup of the computer controller Step 2 Using the GPIB cable connect the external computer con troller tothe IEEE 488 2 GPIB Interface port on the 373XXA rear panel Step 3 Program may run from floppy disk or copied to any folder in the computer and run from there Step 4 Non Ratio and Transmission tests If any tests fail refer to the Troubleshooting and Help selections of the Test Software menu for assistance 373XXA MM Chapter 4 Performance Verification Table of Contents INTRODUCTION 6 e 4 3 4 1 4 2 4 3 4 4 4 5 373XXA CALIBRATION AND MEASUREMENT CONDITIONS 4 3 Standard Conditions EE jeu E eda Stabe ate 4 3 Special Precautions CU 4 4 MEASUREMENT ACCURACY s s n n ne 4 4 Verification Software uy Ke TS ges Gem wpe ge 4 4 Verification Result Determination 4 5 VERIFICATION PROCEDURE ss n n 4 5 KEY SYSTEM PARAMETERS 4 6 Measurement En
163. le of rear panel near fan mounting screws See Figure 8 10 Locate cable from the rear panel 10 MHz Ref In BNC con nector to connector J 2 of A7 PCB Disconnect at A7 J 2 end Pull up gently to disconnect Locate cable from the rear panel 10 MHz Ref Out BNC connector to connector 3 of A7 PCB Disconnect at A7 J 3 end Locate cable from the rear panel Ext Anlg In BNC connec tor to connector 1 of A5 PCB Disconnect at A5 J 1 end Place the 373XXA on its right side monitor down Locate the cables from the rear panel Ext Trigger and Ext Anlg Out BNC connectors to connector P13 of the A18 Rear Panel PCB Disconnect at A18 P13 end A18 P3 is the fourth connector away from the rear panel bottom lip Disconnect the large ribbon cable from connector P1 of the A18 PCB at motherboard connector J 12 Disconnect the two cables from the Power Supply Module at motherboard connectors J 4 and J 13 Disconnect power cord from the Power Supply Module to the internal VGA Display Monitor at the display monitor 11373 is equipped with Option 11 Reference Loop Ex tension Cables Using X in wrench disconnect the external cable Loops from the rear panel connectors Using a X in wrench disconnect the semi rigid coaxial lines W141 and W145 at theinside of the rear panel See Figure 8 11 on page 8 23 11373 is equipped with Option 10 High Stability Time Base W Locate output cable from the high stabili
164. lect in se quence HAN CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW CAL FRE NOTE Also save the calibration data to floppy disk for archival purposes as a backup in case of a hard disk failure Label the disk with cali bration type F RE date and system model and serial numbers Set the copy protect tab on the disk Properly safeguard the disk so that it will be available for later use as needed Perform the Source F M Lock Linearity test in Chapter 3 Operational Tests If thetest fails proceed to Chapter 5 Troubleshocting 373XXA MM 6 7 POWER ALC CALIBRATION ADJUSTMENTS If calibration fails Verify the GPIB cableis connected to the Dedicated GPIB bot tom connector on the 373XXA rear panel Verify that the frequency counter is functioning correctly the ca ble 15 in good condition and all connections are secure Q Notewhich calibration step failed from the screen messages Repeat the calibration If it still fails then to Chapter 5 Trou bleshooting 6 5 RF POWER ALC This procedure uses the 373XXA internal diagnostics and calibration CALIBRATION menus in conjunction with a suitable power meter to adjust the out put power level of the signal source throughout the range of the 373XXA model being calibrated Perform this calibration procedure if The Source Power ALC test in Chapter Operating Test fails Other testing or troubleshooting reveals a possible probl
165. lem is encountered when the system is actively mak ing measurements The Phase Lock error codes 6000 6999 will have an alphabetical suffix code following the message For example 6079 PHS LCK FAIL ABCDG This code consists of one or more letters from A that rep resent the sub assembly that was not locked and or the nature of the failure The phase lock failure mode suffixes are listed in Table 5 2 Note that most phase lock error codes will normally consist of a letter identifying the unlocked assembly and the D and or DE letters that indicate the Source Module is also unlocked This is normal since all components in the phase lock loop must be correctly locked in order for 5 11 SYSTEM HAS ERROR CODE TROUBLESHOOTING Service Log Snap Shot Data 5 12 Table 5 2 Phase Lock Error Message Failure Suffixes Failure Failed Assembly Failure Failed Assembly Suffix Failure Mode Suffix Failure Mode A 10 MHz not present E IF lock signal level too low B LO1 unlocked F Ext synthesizer unlocked 02 unlocked 03 unlocked D Source unlocked Unknown the Source Module to achieve lock Refer to Figure 5 2 for a flowchart that troubleshoots the 240 GHz models 373974 Example 1 Any of the following error messages indicate that the LO1 PCB assembly was not able to lock 6002 PHS LCK FAIL B 6010 PHS LCK FAIL BD 6026 PHS LCK FAIL BDE Also note that if the 10 MHz Reference fail
166. limit lines are all user definable Trace Overlay Displays two data traces on the active channel s graticule simultaneously The overlaid trace is displayed in yellow and the primary trace is displayed in red Trace Memory separate memory for each channel can be used to store measurement data for later display or subtraction addition multiplication or division with current measurement data Scale Resolution minimum Log Magnitude 0 001 dB div Linear Magnitude 1 pU Phase 0 01 Group Delay 0 001 ps 373XXA MM PERFORMANCE SPECIFICATIONS Time 0 001 ms Distance 0 1 um SWR 1pU Power 0 05 dB Autoscale Automatically sets Resolution and Offset to fully display measurement data Reference Position Can be set at any graticule line Annotation Type of measurement vertical and horizon tal scale resolution start stop or center span frequencies and reference position Blank Frequency Information Blanking function re moves all references to displayed frequencies on the CRT Frequency blanking can only be restored through a system reset or GPIB command MEASUREMENT ENHANCEMENT Data Averaging Averaging of 1 to 4096 averages can be selected Averaging can be toggled on off with front panel button A front panel button turns data averaging on off and a front panel LED indicates when averaging is active Video IF Bandwidth Front panel button selects four levels of video IF bandwidth MAXIMUM 10 kHz NOR MA
167. ll 2300 212 Front Panel Encoder Knob All 2000 577 Front Panel Amber Lens All 790 412 Fuse 8A Fast Blow 3AG Cartridge type F1 Line fuse for power All 631 72 supply assembly Battery Backed RAM All 54 1350 Back Up Battery All 633 20 LCD Back Light Driver PCB LCD Equipped 2000 770 LCD Back Light Lamp LCD Equipped 632 55 373 XXA 2 7 PARTS ORDERING INFORMATION REPLACEABLE PARTS Table 2 7 Signal Source Module RF Microwave Components Assembly Part 373XXA Model Option Part Number YIG Oscillator 2 20 GHz All C21620 1 Down Converter All D27532 Switched Filter 37317A and below D45243 Switched Filter 37325A and above D45244 Table 2 8 Factory Repairable Non E xchange Parts Assembly Part 373XXA Model Option Part Number Test Port Connector K Male All 34UK50 Test Port Connector GPC 7 Opt 7A only 34UA50 Test Port Connector 3 5 mm Opt 7S only 34US50 Test Port Connector type N Opt 7N only 34UN50 Test Port Connector type NF Opt 7NF only 34UNF50 Test Port Connector V 37397A 34YV50 2 8 373XXA MM PARTS ORDERING INFORMATION REPLACEABLE PARTS Ovenized Reference Oscillator Option 10 only Power Printed Circuit Board Assemblies Fan Assembly Printed Circuit Board Assemblies 1 9 VGA Monitor KK A WN Front Panel Assembly Includes Front Panel PCB 2 9 373XXA MM Figure 2 1
168. lt Determination ree VERIFICATION PROCEDURE sc n n n KEY SYSTEM PARAMETERS 2 Measurement Environment Considerations easurement Technique ince wat tate wide op sth 373 Chapter 5 Troubleshooting 5 1 5 2 5 3 5 4 5 8 5 9 INTRODUCTION MN 5 3 ASSOCIATED INFORMATION IN THIS MANUAL 5 3 RECOMMENDED TEST EQUIPMENT s 5 4 SYSTEM DOES NOT POWER UP 3 99999999999 5 4 Line Source and Interface Checks 5 4 Power Supply Voltages Check tts 5 4 Power Supply Module Check tes 5 6 SYSTEM DOES NOT BOOT UP she 5 7 Boot up Process Sequence m meo dat moie dw omo Toe 5 7 Troubleshooting Boot up Problems rro 5 8 Disk Problem 1 525 e 49 8 f f n n n n n n n 5 8 Hard Disk Problem 5 9 Floppy Disk Problems e dap GaP 5 9 Screen Display Problems x ecco Hte cases 5 10 SYSTEM HAS ERROR CODE lt 5 10 Phase Lock Error Codes 6000 Series 5 11 Service Log Snap Shot Data lt lt 5 12 SOURCE TEST SET RECEIVER 9 9 rsen 5 17
169. ly 8 28 A41 Power Amplifier Assembly 8 27 5 A D Converter 2 7 12 A7PCB 10MHzTimebase s 7 9 7 7 12 8 ADJ USTMENT 37397A s 6 13 A8 Source Signal Separation and Control PCB coge ye RE LAM Ru 7 11 A9 Main Processor PCB Assembly 7 13 A9 CHIP 8 6 8 9 A9 SRAM BATTERY 8 10 8 11 Acrobat Reader insi rim 1 3 Adjustments 21 2 37397 6 14 8 37397 6 13 Frequency Calibration 6 5 Internal Hardware Adjustments Calibratioin asa qe id ede pak uae 7 9 pou se Spies FEO 1 5 Introduction to 6 3 01 Calibration 77777 6 3 02 Calibration lt lt lt 6 4 RF Power ALC Calibration 6 8 Source Lock Threshold 6 11 Acrobat SEE Ee tas ag Se E 1 3 ANALOG SUBSYSTEM ASSEMBLIES 7 7 7 12 ANRITSU Service Centers 1 9 2 4 372XXB MM ASSOCIATED INFORMATION IN THIS MANUAL 5 3 Avoid Mechanical Shock 4 Avoid Over Torquing Connectors 4
170. n the reverse order Use the following procedure to remove replace the YIG Oscillator as sembly Procedure Step 1 Disconnect the YIG Oscillator assembly power cable from connector J 3 of the A21A1 PCB Pull up on the flexible cir cuit connector handle to disconnect Step 2 Disconnect the semi rigid coaxial line from the connector 16 top of the Switched Filter 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 coaxial line from the output con nector of the YIG Oscillator assembly Put this coaxial line aside for re use NOTE When replacing the YIG Oscillator assembly connect the semi rigid coaxial line removed in Step 4 to the output connector of the YI G Oscillator before attaching it to the Signal Source Module To replace the YIG Oscillator assembly perform the steps above in the reverse order 373XXA MM Appendix Diagnostics Menus Table of Contents 1 2 INTRODUCTION 410404040404 240404040 4 EE IE 3 DIAGNOSTICS MENUS n n n n n Start Self Teste 3 rn Service Log 410404040404 240404040 4 00 4744 040 404040404 n on n 3 Installed Options s 4 Peripheral Tests Sy a A 4 Troubleshooting 3 o oee 4 H W Calibrations
171. n be switched to a value of 801 401 201 101 or 51 points without recalibration if 1601 points were used in the cali bration In addition the system accepts an arbitrary set of discrete data points where 2sN lt 1601 CW mode per mits selection of a single data point without recalibration Reference Delay Can be entered in time or in distance when the dielectric constant is entered Automatic refer ence delay feature adds the correct electrical length com pensation at the push of a button Software compensation for the electrical length difference between reference and test is always accurate and stable since measurement fre quencies are always synthesized In addition the system compensates reference phase delay for dispersive trans mission media such as waveguide and microstrip Markers Six independent markers be used to read out measurement data In delta reference marker mode any one marker can be selected as the reference for the 373 XXA APPENDIX other five Markers be directed automatically to the minimum or maximum of a data trace Enhanced Markers Marker search for a level or band width displaying an active marker for each channel and discrete or continuous interpolated markers Marker Sweep Sweeps upward in frequency between any two markers Recalibration is not required during the marker sweep Limit Lines Either single or segmented limit lines can be displayed Two limit lin
172. n on date ti me temperature current power on date time temperature total operational hours system model serial and in stalled option numbers date time temperature stamp of current serv icelog viewing session date time temperature of internal hardware calibrations and statistics about various internal system phase lock ing activities The error listing is a time ordered log containing the system faults with details about the system condition at the time of the fault DIAGNOSTICS MENUS Installed Options Peripheral Tests Troubleshooting A 4 APPENDIX A NOTE The service log must always be printed out or saved to disk and sent to the factory along with a failed assembly Due to the importance of the information provided by the service log to ANRITSU factory Service Engineers the ex change prices are only valid if the service log data disk or printout is submitted to the factory with the failed assem bly This menu is available to service and non service personnel H owever the service log should be cleared by service personnel only ThelNSTALLED OPTIONS menu lists installed option numbers and descriptions This menu is availableto service and non service personnel The PERIPHERAL TESTS menu DG3 tests the printer and GPIB ports internal VGA monitor front panel operation and the external compatible keyboard if keyboard is connected These tests will require some interaction and external devices such
173. nformation See Caution message at top of page 3 4 373XXA MM OPERATIONAL TESTS 3 3 SELF TEST 373XXA droauits are functional and operating properly To start the self test Step 1 play the OPTIONS menu Step 2 SELF TEST below OPTIONS TRIGGERS REAR PANEL OUTPUT DIAGNOSTICS MULTIPLE SOURCE CONTROL PRESS lt ENTER gt TO SELECT Select DIAGNOSTICS from menu then select START DIAGNOSTICS START SELF TEST READ SERVICE LOG INSTALLED OPTIONS PERIPHERAL TESTS TROUBLESHOOTING FOR SERVICE NLY HW CALIBRATIONS FOR SERVICE NLY PRESS lt ENTER gt TO SELECT SELF TEST The self test performs a series of tests that verify that various internal Press the Option Menu key Enhancement key group to dis Step 3 Wait for test sequence to complete Once invoked this test requires no user interaction or external equipment Upon completion the net pass fail result of the self test is shown on the CRT display If the 373XXA is in remote only operation the re sults are reported via the GPIB output buffer If the self test fails de tailed error messages will be written into the service log If self test fails 373XXA MM Check the service log to view failure messages Proceed to Chapter 5 Troubleshooting PERIPHERALS AND INTERFACES OPERATIONAL TESTS 3 4 PERIPHERALS AND INTERFACES These tests are used to verify the operation of the liquid
174. ng kit contain ing a set of mounting ears and hardware to permanently mount instrument in a standard 19 inch equipment rack OPTION 2 High Speed Time Distance Domain Measurement Capability OPTION 4 External SCSI 2 Hard Disk Drive Compatibil ity Provides SCSI 2 rear panel connector for connection of an external SCSI HDD Remove internal HDD OPTION 7A N NF S K Universal Test Port Configura tion Replaces Universal K Connector standard with Universal GPC 7 7N Universal N male 7NF Universal N female 75 Universal 3 5 mm male OPTION 10A High Stability Time Base Replaces the standard temperature compensated crystal oscillator with a temperature stability of over a 0 to 55 C range with an ovenized crystal oscillator aging stability of 1x 10 day and temperature stability 5 x 10 over 0 to 55 range Adds 1 Hz frequency resolution UPGRADE OPTIONS 37200A Upgrade to a higher frequency 37200A 373XXA PERFORMANCE SPECIFICATIONS 37200A Upgrade to an equivalent or higher frequency 37300A 37200B Upgrade to a higher frequency 37200B 37200B Upgrade to an equivalent or higher frequency 37300A 37300A Upgrade to a higher frequency 37300A Please call your Anritsu representatives for pricing and de livery ON SITE SUPPORT Option ES 31 3 year on site repair Option ES 37 3 year on site verification Option ES 38 3 year on site Mil Std verification Option ES 51 5 year on site rep
175. ns displayed the 373XXA CRT screen until calibration is completed After the calibration process is completed perform the following ac tions as appropriate If calibration passes Save the calibration data to hard disk as follows 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 HAN CALIBRATIONS DISK OPERATIONS SAVE TO HARD DISK HW CAL SLT NOTE Also save the calibration data to floppy disk for archival purposes as a backup in case of a hard disk failure Label the disk with cali bration type date and system model and se rial numbers Set the copy protect tab on the disk Properly safeguard the disk so that it will be available later use as needed If calibration fails Repeat the calibration If it still fails then proceed to Chapter 5 Troubleshooting 373XXA MM ADJUSTMENTS 6 7 As ADJUSTMENT 37397A 373XXA MM Calibration Procedure Post Calibration Actions 8 ADJUSTMENT 37397 adjustments are important to the operation of the above 56 GHz Improperly adjusted A8 Potentiometers may cause lock failures Perform these adjustments as follows TheA8 PCB is replaced Q 44733 Buffer Amp is replaced Perform the following steps Equipment Required None NOTE Allow the 373XXA to warm up at least 30 minutes prior to performing calibration and
176. oblem occurs in Band 1 replace the Down Con verter assembly and repeat test 373XXA MM TROUBLESHOOTING Check 8 5 8 PERIPHERALS INTERFACE 373XXA MM CRT Display Test Failures PERIPHERALS INTERFACE If it fails contact ANRITSU Customer Service Center Step 3 If the problem only occurs in Band 3 replace the Switched Doubler Module assembly and repeat test If it fails replace Switched filter and repeat test If it fails contact ANRITSU Customer Service Center Step 4 If the problem only occurs in Band 2 replace Switched Fil ter assembly and repeat test If it fails contact ANRITSU Customer Service Center NOTE After replacing a component perform a F requency Cali bration and a RF power ALC Calibration Refer to Chap ter 6 Adjustments If you have determined that failure occurs in both sweep directions at all frequencies and Error Code 5110 is recorded in the Service Log the failed component could be any of the following assemblies 1 Transfer Switch 2 Switched Doubler Module 3 Oscillator 4 A21A1YIG Bias 5 A21A2 Source Control PCB Replace the components listed above in sequence After each replace ment recalibrate unit see note above and retest If 373XXA still fails contact your nearest ANRITSU Customer Service Center The following paragraphs contain procedures to be used for troubleshoot ing 373XXA peripheral or interface test failures Select the paragraph subhead
177. ocation of the 24 VME Bus Terminator Assembly 8 12 373XXA MM REMOVE AND REPLACE FRONT PANEL ASSEMBLY Equipment Required Open end wrench 1in Preliminary Switch 373XXA power off Remove the power cord Remove handle assembles and all covers paragraph 8 3 Remove Replace Procedure Step 1 Step 2 Step 3 Step 4 Step 5 Place the 373XXA in normal top side up position Remove the four corner screws and the top center screw that secure the front panel assembly to the chassis see Figure 8 6 Place the 373XXA on its top bottom side up Remove the screw that fastens the front panel casting ex tension lip to the Test Set Module tray See diagram at left Usinga lin open end wrench remove the nuts and wash ers that secure the Port 1 and Port 2 couplers bridges to the front panel casting Figure 8 6 Removal of Front Panel Assembly 373XXA MM VGA DISPLAY MONITOR 8 9 VGA DISPLAY MONITOR 8 14 REMOVE AND REPLACE Step 6 Locate the cable from the front panel Power switch to con nector 20 on the 17 Motherboard PCB Disconnect at 17 J 20 end Step 7 Locate the cable from the front panel Keyboard interface connector to connector 16 on the 17 Motherboard PCB Disconnect at A17 J 16 end Step 8 Locate the cables from the front panel
178. ode This type of processing requires a sweep over a harmonic series of frequencies and an extrapolated or user entered DC value Bandpass Mode This mode displays a response equiv alent to the time response of the device under test to a band limited impulse This type of processing may be used with any arbitrary frequency sweep range limited only by the test set range or device under test response Phasor Impulse Mode This mode displays a response similar to the Lowpass impulse response using data taken over an arbitrary band limited sweep range Detailed in formation similar to that contained in the lowpass impulse D 10 APPENDIX D response may be used to identify the nature of impedance discontinuities in the device under test Now with Phasor Impulse it is possible to characterize complex impedances on band limited devices Windowing Any one of four window functions may be applied to the initial frequency data to counteract the ef fects of processing data with a finite bandwidth These win dows provide a range of tradeoffs of main lobe width ver sus sidelobe level ringing The general type of function used is the Blackman Harris window with the number of terms being varied from one to four Typical performance follows Number of Terms Relative to Peak Impulse Width Rectangular 1 13 dB 1 2W Nominal Hamming 2 43 dB 1 8W Low Side Lobe 67 dB 2 1W Blackman Harris 3 Minimum Side Lobe 9
179. og Subsystem Figure 7 2 at left Q 2 20 GHz YIG Oscillator Assembly A21A1 YIG Bias Controller PCB A21A2 Source Control PCB Switched Filter Assembly Down Converter Assembly m m m m The Signal Source Module is a swept frequency signal generator that produces a phase locked and leveled output signal within a range of 22 5 MHz to 20 GHz All Series 373XXA VNA models employ phase lock control of the signal source module so that the output fre quency is accurate and stable The output signal is phase locked by the 6 MHz volt control signal fed back from the A8 Source Lock Sep aration Control PCB Assembly which is described in following para graphs Series 372XXB VNA models use a single YI G tuned oscillator to produce fundamental frequency source signals from 2 0 to 20 GHz AII other output frequencies are derived from the fundamental frequen cies generated by the Y IG tuned oscillator The signal source output frequencies for the low end portion of the frequency range 22 5 MHz to 2 0 GHz are produced by down converting YIG fundamental signals in therange of 6 3225 to 8 3 GHz For Model 37369A the signal source output frequencies for the high end portion of the frequency range 20 to 40 GHz are produced by the Switched Doubler Module that doubles the Y IG fundamental signals in the range of 10 to 20 GHz The Switched Doubler Module SDM is located in the Test Set Module described below The A21A2 Source Control
180. or Messages 1 of 8 Error Message Description These errors are entered in the Service Log and output as part of the response of OGE OGL commands for GPIB com mands The list is subdivided into the type of GPIB error 7204 7205 7206 and 7207 7204 GPIB COMMAND ERROR DESCRIPTIONS Faulty program mnemonic syn tax Generated when the program mnemonic found was not one of the currently defined program mnemonics for the 373XXA Faulty suffix mnemonic syntax Generated when the suffix mnemonic found was not one of the currently defined suffix mnemonics for the 373XXA Faulty mnemonic syntax Generated when the mnemonic found was not one of the currently defined program or suffix mnemonics for the 373XXA Missing Program Message Separator Generated when the required semicolon preceding the next program mnemonic was not found Expected data Generated when a mnemonic is used that requires a trailing NRf numeric data ele ment The data element was either missing or the first character of the data element was not one of the acceptable NRf characters NRf mantissa too long The maximum allowable number of characters in the NRf numeric element mantissa is 255 Exponent magnitude too large The maximum allowable exponent magnitude in element is 32000 Faulty NRf syntax Can be any number of syntactical errors such as more than one decimal point inclu
181. or Pin Depth Tolerance Port Pin Depth Gauge Conn Type MILS Reading 0 000 EET 0 003 Pin Depth 20 0 000 20 240 000 SUMAS 7 40 004 7 0004 20 0 004 7 0000 0 000 3 5 0 002 0 0000 0 0035 Pin Depth K Male Female 0 000 to 0 001 0 000 to 0 001 Over torquing connectors is destructive it may damage the connector center pin Finger tight is usually sufficient especially on con nectors Should it be necessary to use a wrench to tighten SMA or WSMA connectors use a torque wrench that breaks at 8 inch pounds As a general rule never use pliers to tighten connectors The center conductor on many precision connectors contains a small teflon tuning washer located near the point of mating interface This washer compensates for minor impedance discontinuities at the inter face The washer s location is critical to the connector s performance Do nct disturb it Precision connectors are designed 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 care ful handling The precise geometry that makes a precision connector 5 high perfor mance possible can be disturbed by dirt and other contamination ad 373 MM APPENDIX Visual Inspection 3
182. ot available Install floppy diskette and or check floppy disk drive 7170 GENERAL HARD DISK FAIL General error in accessing hard disk Retry and if still fails reformat the hard disk drive and or check floppy disk drive 7172 HARD DISK READ ERROR Read error when accessing disk file Retry and if still fails reformat the hard disk drive and or check floppy disk drive 7173 HARD DISK WRITE ERROR Error in writing to disk file Retry and if still fails reformat the hard disk drive and or check floppy disk drive 7177 HARD DISK UNAVAILABLE Hard disk is not available Install hard disk drive and or check operation of hard disk 8140 GENERAL DISK BUFFER ER ROR Out of RAM Press the System State Default Pro gram key and retry This will reset the 373XXA to the factory default state FILE NOT FOUND Disk file not found None FLOPPY DISK HAS NO ROOM FOR FILE Floppy diskette is full Delete files or install new diskette FLOPPY DISK NOT READY Floppy disk is not ready or not in stalled Install diskette in floppy drive FLOPPY DISK WRITE PROTECTED Write protect tab in place on floppy diskette Remove write protect tab HARD DISK HAS NO ROOM FOR FILE DELETE EXISTING FILES S TO CREATE SPACE Hard disk is full Delete unneeded files 373XXA MM B 7 SERVICE LOG ERROR MESSAGES APPENDIX B Table 3 GPIB Related Err
183. over Release all five catches and remove the cover Step 3 Carefull replace the Backlight Lamp while being careful not to apply pressure to the area where the glass tube and the end caps of the Backlight Lamp meet Step 4 Reinstall the Backlight Lamp cover Step 5 Reinstall the LCD Assembly and reconnect electrical con nectors Step 6 Reinstall the top cover Step 7 Turn the instrument on Adjust the Brightness Potentiome ter at the rear panel for maximum display brightness This paragraph provides instructions for removing and replacing the Floppy Disk Drive assembly NOTE It is not necessary to remove the front panel assembly to perform this procedure 8 17 FLOPPY DISK DRIVE REMOVE AND REPLACE Figure 8 9 Location of Floppy Disk Drive Assembly Mounting Plate Screws Preliminary Switch 373XXA power off Remove the power cord Remove all covers paragraph 8 3 NOTE All the the cables mentioned in the following procedure have keyed connectors Remove Replace Procedure Step 1 Place the 373XXA on its top bottom side up Step 2 At the floppy drive disconnect the four conductor Disk Power cable that connects to 1 of the motherboard PCB Step 3 At J2 the motherboard PCB disconnect the Floppy Con trol ribbon cable that goes to the floppy drive Step 4 Remove the three screws that fasten the floppy disk drive mounting plate to the chassis and to the Test
184. ower Meter Q ANRITSU ML24XXA with Version 2 02 or later with ANRITSU Power Sensors MA2474A and TCD for 65 GHz units EIP 20 GHz series counter w GPIB Option 08 You need only connect the power meter or counter appropriate for the 373XXA model invoke the calibration desired and wait until com plete The ALC and Frequency calibrations take 5 to 10 minutes each See Chapter 6 Adjustments for further information The disk operations allow storage and retrieval of internal hardware calibration data to and from floppy disk This feature will be useful when replacing the 9 Processor PCB since it contains the Battery Backed RAM where the internal hardware calibration data resides Automated field calibrations for the LO1 and LO2 assemblies not presently implemented Should these assemblies fail or require any adjustment they must be replaced under the exchange assembly pro gram refer to Chapter 1 These menus are for service personne only 373XXA MM A 5 A 6 SYSTEM DESCRIPTION DIAGNOSTICS MENUS
185. parts for trouble shooting and or replacement Appendix A Diagnostic Menus This appendix contains descriptions and usage information for the Diagnostic Menus that are avail able via the front panel Option Menu key Appendix B Error Codes Messages This appendix contains a listing of the Error Codes M essages Also included is a description of the in formation fields that are part of the error messages 373XXA MM i lt This appendix contains procedures and information needed to perform maintenance checks includ ing pin depth measurements for the connectors on all ANRITSU supplied Calibration Verification Kit components Through cables and other associated RF microwave components Appendix D Performance Specifications Appendix E Verification Software Users Guide This appendix contains the Model 360X 372XXB VNA Performance Verification Software Users Guide P N 10410 00208 This Software Users Guide explains in detail the procedures to be used for the installation and operation of the 373XXA VNA Verification Software on your computer controller Index 373XXA MM Table of Contents Detailed Chapter 1 General Information 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 373 XXA MM SCOPE OF MANUAL Schw Side RU cae a ny CURT 1 3 INTRODUCTION
186. plied Calibration Sequence Prompts the user to connect the appropriate calibration standard to Port 1 and or Port 2 Calibration standards may be measured simultaneously or one at a time Calibration Standards For coaxial calibrations the user selects SMA GPC 3 5 GPC 7 Type N 2 4 mm TNC K or V Connector from a calibration menu Use of fixed or sliding loads can be selected for each connector type User defined calibration standards allow for entry of open D 7 PERFORMANCE SPECIFICATIONS capacitance load and short inductances load impedance and reflection standard offset lengths Reference Impedance Modify the reference impedance of the measurement to other than 50 ohms but not 0 LRL LRM Calibration Capability The LRL calibration technique uses the characteristic impedance of a length of transmission line as the calibration standard A full LRL cal ibration consists merely of two transmission line measure ments a high reflection measurement and an isolation measurement The LRM calibration technique is a variation of the LRL technique that utilizes a precision termination rather that a second length of transmission line A third op tional standard either Line or Match may be measured in order to extend the frequency range of the calibration This extended calibration is achieved by mathematically concat enating either two LRL two LRM or one LRL and one LRM calibration s Using these techniques full 12 term er ro
187. poses Procedure Step 1 Press the Option Menu key Enhancement key group to dis play the OPTIONS menu Step 2 Select DIAGNOSTICS from menu left then select READ SERVICE LOG from the DIAGNOSTICS menu DIAGNOSTICS The 373XXA will now display the contents of the service OPTIONS T log The display consists of a header and an error listing TRIGGERS READ SERVICE LOG The header contains a variety of system service informa REAR PANEL INSTALLED OPTIONS tion The error listing contains error messages for failures DIAGNOSTICS PERIPHERAL TESTS that may have occurred during operation MULTIPLE SOURCE CONTROL PRESS lt gt HW CALIBRATIONS SELECT Ely p cE e Errors 7201 7209 GPIB remote opera PRESS lt ENTER gt tion programming errors report that one TO SELECT or more external GPIB programming er rors has been detected These messages do not indicate a 373XXA system fault nformational messages 0000 0099 report the pass fail status of a peripheral access These messages do not indicate a 373XXA system fault Any other error messages in the service log may indicate an instrument problem and should be investigated Refer to the Chapter 5 Troubleshooting for further information CAUTION The CLEAR SERVICE LOG menu selec tion will immediately and permanently clear all the error message entries from the ser vice log H owever it will not clear the header i
188. prised of up to five separate bands each with independent source and receiver settings for convenient testing of frequency translation devices such as mixers Up to five sub bands may be tested in one sweep This feature enables users to easily test mixers up down converters multipliers and other frequency conversion de vices Source 1 The 373XXA internal source or any of the family of 68XXXB 69XXXA or 6700B synthesizers Source 2 Any of ANRITSU s family of 68 69XXXA or 6700B synthesizers Sweep Type Linear CW Marker or N Discrete point sweep POWER RANGE Model BEI T Resolution dB 37317A 0 95 0 05 37325 5 90 0 05 37347 5 90 0 05 37369 7 97 0 05 37397A 7 79 0 05 373XXA MM APPENDIX LEVEL CONTROL RANGE Without step attenuator 37317A 37325A 37347A 37369A 37397A Above Reset 10 dB 10 dB 10 dB 20 dB 20 dB Power Below Reset 25 25 dB 25 dB 20 dB 20 dB lt 47 GHz Power 12 dB 47 GHz Source power above the reset level is allowed but not guaranteed especially over the full frequency range POWER FLATNESS Frequency Range GHz Flatness dB 0 0225 to 13 5 1 5 13 5 to 20 2 0 20 to 40 3 0 40 to 65 5 0 SOURCE PURITY Specifications apply for all models at maximum rated power Harmonics amp Harmonic Related 15 dBc 37325A 37347A 37369A 37397A
189. r n nn Post Calibration Actions sss rne 6 1 INTRODUCTION 6 2 01 CALIBRATION 373XXA MM Calibration Procedure Post Calibration Actions Chapter 6 Adjustments This chapter contains procedures that are used to restore the calibration of the 373XXA signal source and the related source lock system assem blies Use these procedures after various signal source related assemblies have been replaced due to troubleshooting or repair activities Please insure you have read and fully understand the servicing con cepts for the 373XXA presented in Chapter 1 prior to continuing with this chapter This procedure uses the 373XXA internal diagnostics and calibration menus to adjust the Al 1st LO PCB assembly Perform this calibation procedure if TheA1PCB is replaced BBRAM chip on A9 Processor PCB is replaced and the Source Lock Threshold Calibration data was not previously saved on disk that is data is not available for recall from a floppy disk Perform the following steps Equipment Required None NOTE Allow the 373XXA to warm up at least 30 minutes prior to performing calibration Procedure 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 HAW CALIBRATIONS then LO1 CALIBRA TION Step 3 Follow the directions displayed on the 373XXA CRT screen until calibration is completed
190. r 373XXA Port con nectors or calibration devices always measure the pin depth of the de vice s connectors Use a ANRITSU Pin Depth Gauge or equivalent for these measurements Figure C 2 Also measure the connector pin depth of a device when intermittent or degraded performance is sus pected Gauging sets for measuring the pin depth of precision connectors are available from your nearest ANRITSU Service center or from the tory Instructions for measuring connector pin depth are induded with the gauging set s APPENDIX PRECAUTIONS Pin Depth Tolerance Avoid Over Torquing Connectors Teflon Tuning Washers Avoid Mechanical Shock Keep Connectors Clean The center pin of a precision connector has a tolerances measured in mils one mil 1 1000 inch The connectors of test devices may not be precision types and they may not have the proper pin depth These connectors should be measured before mating to ensure suitability When gauging pin depth if the connector being measured indicates out of tolerance in the region of the gauge Table C 1 the center pin is too long Mating under this condition will likely damagethe mating connector On the other hand if the test device connector indi cates out of tolerance in the region the center pin is too short Whilethis will not cause any damage it will result in a poor connec tion and a consequent degradation in performance Table C 1 Connect
191. r correction can be performed on the 373XXA VNA Adapter Removal Calibration Built in Adapter Removal application software accurately characterizes and re moves any adapter used during calibration what will not be used for subsequent device measurements This tech nique allows for accurate measurement of non insertable devices Dispersion Compensation Selectable as Coaxial non dispersive Waveguide or Microstrip dispersive Reference Plane Selectable as Middle of line 1 or Ends of line 1 Corrected Impedance Determined by Calibration Stan dards HARD COPY Printer Menu selects full screen graphical tabular data S2P or Text output and printer type The number of data points of tabular data can be selected as well as data at markers only Compatible with the 2225C InkJet HP QuietJet HP 310 320 340 DeskJet HP 500 Deskjet HP 560C DeskJet b w only HP LaserJet Il IIl amp IV Series and some Epson compatible printers with Parallel Centr onics interfaces GPIB Plotters 37XXX VNA is compatible with HP Models 7440A 7470A 7475A and 7550A in standard mode and Tektronix Model HC100 plotters Menu selects plotting of full or user selected portions of graphical data Plotter is connected to the dedicated GPIB bus Performance After selecting the Start Print button front panel operation and measurement capability is restored to the user within 2 seconds STORAGE Internal Memory Ten front panel states
192. rary ASCII response data element and an attempt is made to place another re sponse data element of any kind into the queue The new response data element is discarded Interrupted Response data dis carded This error is detected when the output queue contains unread response data and the controller sends a new program message The response data is discarded Unterminated Partial PM will be executed This error is detected when the 373XXA s input queue is currently receiving a program message but has not yet received the end message and the controller attempts to read response data from the 373XXA The partial program message in the input queue is executed as if it were properly terminated Deadlock Response data dis carded This error is detected when both of the 373XXA s input and output queues are full and the controller attempts to send another data byte In order to prevent bus deadlock the contents of the output queue are discarded 7205 GPIB DEVICE DEPENDENT ERROR DESCRIPTIONS Q SEND failure in a procedure name An unsuccessful attempt was made to send a message to a task The procedure name is the place in the software where the error was detected Q RECEIVE failure in a proce dure name A failure was detected while waiting for the reception of a message from a task The procedure name is the place in the software where the error was detected Unable to allocate memory in a proc
193. rices are only valid if the service log data is included with the failed assembly Please have the exact model number and serial number of your unit available when requesting this service as the information about your unit is filed according to the instrument s model and serial number For more information about the program contact your local sales rep resentative or call ANRITSU Customer Service direct refer to para graph 2 4 Tables 2 2 through 2 5 starting page 2 5 list the major replaceable sub assemblies and parts for the 373XXA These assemblies parts are pres ently covered by the ANRITSU exchange assembly program Table 2 6 page 2 6 lists disposable parts for the 373XXA and Table 2 7 and 2 8 lists factory repairable parts for the 373XXA The parts listed in Tables 2 6 through 2 8 are not presently on the exchange assembly program NOTE The 373XXA A17 Motherboard PCB Assembly is not a field replaceable item 2 3 PARTS ORDERING INFORMATION 2 4 PARTS ORDERING INFORMATION Table 2 1 ANRITSU Service Centers 2 4 UNITED STATES ANRITSU COMPANY 490 Jarvis Drive Morgan Hill CA 95037 2809 Telephone 408 778 2000 FAX 408 778 0239 ANRITSU ANRITSU COMPANY 685 Jarvis Drive Morgan Hill CA 95037 2809 Telephone 408 776 8300 FAX 408 776 1744 ANRITSU ANRITSU COMPANY 10 Kingsbridge Road Fairfield NJ 07004 Telephone 201 227 8999 FAX 201 575 0092 AUSTRALIA ANRITSU PTY LTD Level
194. rmalization data when there was no normaliza tion data currently stored Command sequence too long An attempt was made to define a device trigger command sequence which had more than 255 characters Unable to display menu An attempt was made to display a menu which could not be displayed for the current 373XXA state String too long An attempt was made to enter a string for the following mnemonics which exceeded the specified maximum length LTD LID LMS and LNM maximum length is 15 characters LOC maximum length is 79 characters Must specify a calibration type first In order to perform a calibration the calibration type must be specified by the use of one of the Cxx mnemonics i e C12 C8T etc PRIOR to the issuance of the mne monics CWC TDC or BEG Parameter value unchanged An attempt was made to change a start stop frequency or number of data points to a value outside of the current calibrated range with correction turned on Parameter change not permitted An attempt was made to perform an illegal state change or action based on the cur rent 373XXA state This includes attempting to store an undefined band definition Or certain changes from the calibration state or the calibration define state when defining discrete frequencies Parameter value out of range Parameter out of hardware range An attempt was made to set a parameter to a value outside of the permissible range of val
195. rposes using the Operational Checkout chapter in the 373XXA Operations Manual Those procedures are useful in quickly verifying that the instrument s primary measure ment functions are operational and stable Full operational testing of the system is detailed in Chapter 3 Opera tional Tests These tests should be performed annually or more often depending on system use Verification of the system s measurement accuracy and other key per formance parameters may be done using the procedures in Chapter 4 Performance Verification This should be performed annually or more often depending on system use The 373XXA A9 Processor PCB contains a battery bad ed memory real time dock chip BBRAM and a static memory SRAM backup battery These have a finite life span and should be replaced periodically per the procedures in Chapter 8 Removal and Replacement Procedures The BBRAM chip has a rated life span of 4 years The SRAM backup battery has a worst case elapsed time for SRAM battery protection of 200 days The SRAM battery life span will vary according to how the system is used that is how often the system is powered off for ex tended periods of ti me Instruments with customer requested spedal modifications performed by ANRITSU will have identifying Specials Modification number printed on therear panel This number will be preceded with the letters SM i e SM 1234 is special modification number 1234 Special instruments
196. ry Switch the 373XXA power off Remove the power cord Remove the top cover paragraph 8 3 1 A9 PCBs Procedure Step 1 Place the 373XXA in normal top side up position Step 2 Remove the two screws that secure the large card cage cover Figure 8 2 Step 3 Remove the large card cage cover and set aside Step 4 Lift up on the edge tabs of the selected PCB s and lift straight up To replace 5 and covers perform the steps above in the re verse order A13 A16 Procedure Step 1 Place the 373XXA in normal top side up position Step 2 Remove the two screws that secure the large card cage cover Figure 8 2 Step 3 Remove the large card cage cover then remove the small card cage cover and set aside Step 4 Lift up on the edge tabs of the selected PCB s and lift straight up To replace 5 and covers perform the steps above in the re verse order 8 5 A9 PCB BBRAM CHIP This paragraph provides instructions for removing and replacing the BBRAM Chip located on the A9 Main Processor PCB assembly 8 6 373XXA MM 9 PCB BBRAM CHIP REMOVE AND REPLACE PCB Assembly PCB Assemblies A13 A16 Printed Circuit Board Assemblies 1 8 LUT 77 CHT c LUT LHI OOE 2227 4777 77 1777 mM 7 OO CI Figure 8 2 A1 A9 and A13 A16 PCB Assemblies Removal Diagram 8 7
197. s OR 1 9 Switched Doubler Module Assembly 8 28 Switched Filter Assembly 8 33 SYSTEM HAS ERROR CODE 5 10 5 16 System Description 13 I O Interface 1PCB 7 15 14 I O Interface 2 7 15 15 Graphic Processor 7 16 Index 5 Index 6
198. s depending on the failure the system will not be able to lock any of the phase lock loop compo nents A1 A2 A7 A8 or Source Module Example 2 Either of the following error messages indicate a 10 MHz Reference probl em 6001 PHS LCK A 6015 PHS LCK ABCDG Error codes will be written to the service log along with some data repre senting a Snap Shot of system conditions at the time of failure Usually the data induded in the snap shot helps to provide faster diagnosis of the error condition The common snap shot data items that will be useful inassembly level troubleshooting and fault diagnosis efforts are listed in Table 5 3 NOTE Some of the data included in the snap shot is useful only for factory troubleshooting activities 373XXA MM TROUBLESHOOTING Table 5 3 SYSTEM HAS ERROR CODE Service Log Snap Shot Data Items Item Description SWP Sweep direction F forward S11 S21 R reverse S22 S12 PWR System source power setting SYS System frequency setting A The calibration results for the Test A Channel PCB A3 This is a series of 16 values divided into groups of four Each group should have values that are approximately 7 that of those in the previous group The first group data values should be approximately 1 00 0 00 0 00 1 00 The values of the next group should be that of those values i e 0 25 0 00 0 00 0 25 The same applies for the values in the rem
199. s interface control B A D Bus interface control a Sample and Hold control for A5 PCB A D selection and conversion control for Ab PCB Check for phase lock condition Gain ranging Delay generation for IF Bandwidth setting function The A14 PCB also provides the interface to the Front Panel A19 and A20 PCBs 373XXA MM 7 15 MAIN CHASSIS ASSEMBLIES A15 Graphics Proces sor PCB Assembly 16 Hard Disk PCB Assembly Floppy Disk Drive Assembly A24 VME Bus Terminator PCB 7 5 CHASSIS ASSEMBLIES 17 System Mother board Assembly Front Panel Assembly 7 16 SYSTEM DESCRIPTION This PCB assembly contains drcuitry that simultaneously drives both the internal VGA monitor and an external VGA monitor if used as follows It receives measurement and display information from the 9 Main Processor PCB and generates screen display video infor mation Q Provides interface and control for the internal VGA Monitor As sembly Provides interface for an external monitor via the rear panel VGA Out connector ThePCB assembly contains a pre formatted hard disk drive assembly and associated interface circuitry The A16 PCB interfaces directly with the A9 Main Processor PCB via the 9 SCSI interface This unit is a standard 1 44 MByte DOS compatible format floppy disk drive It is physically mounted to the test set tray not to the Front Panel Assembly It interfaces to the system via the
200. s the 373XXA Power key off and unplug a single assembly Press the 373XXA Power key on and note if the failed power sup ply functions normally Repeat Steps 1 and 2 until an assembly is found that clears the power supply failure The removed assembly is suspect and should be replaced If the 373XXA does not boot up when it is powered up perform the checks described below Boot up Process boot up process is controlled by the firmware located on the A9 Sequence PCB assembly processor PROM The boot up activities include a a Testing and initializing the A9 Main Processor PCB Testing communication between the A9 PCB and the digital PCB assemblies A13 A14 A15 A16 The following messages will be displayed at this juncture Initializing front panel knob A14 A20 B Initializing GPIB A13 A18 Initializing external keyboard A13 B Initializing external trigger A13 A5 B initializing front panel A14 A20 Loading of system software from disk into memory Starting operation of the system software System is booting message is displayed 5 7 SYSTEM DOES NOT BOOT UP 5 8 TROUBLESHOOTING At this point the system software continues the boot up process by performing the following activities a a Issues command to A15 PCB to change display from TEXT mode to GRAPHIC mode and display ANRITSU logo Performs basic communication tests between the digital
201. s the following rear panel connec tors 10 MHz Reference and Out BNC connectors External Trigger BNC connector External Analog BNC connector External Analog Output BNC connector This assembly also includes Reference Channel Extension Loops Option 11 Main system fan TheA18 Rear Panel PCB and associated connectors circuitry and cables below 18 Rear Panel This PCB assembly contains the rear panel connectors listed below It Interface alsoindudes the associated circuitry and cabling interfaces that link these connectors and the rear panel fan assembly to the A17 other board PCB and other assemblies within the 373XXA IEEE 488 2 GPIB connector with associated interface circuits Dedicated GPIB connector with associated interface circuits Printer Out connector with associated interface circuits VGA Out connector CRT degauss and brightness controls D O O D Connector and associated interface circuits This 25 pin miniature D sub connector contains Limits Testing Status TTL outputs Port 1 Port 2 Bias Inputs m Ext DigIn signal same as External Trigger BNC m Ext Ana Out signal same as External Analog Output BNC The A18 PCB also contains Routing of 24 Vdc power tothe rear panel system fan Routing of External Analog Out and External Trigger Input sig nals to the M other Board 373XXA MM 7 17 MAIN CHASS
202. scheme allows for quick identifi cation of suspect assemblies NOTE Refer to Appendix B Error Codes M essages for a list of the error codes messages for 37300A VNA systems There are cases when a fault on one assembly will cause a different as sembly to be identified as faulty per the error code designated This happens when a failure occurs on an assembly that provides a stimu lus or a calibration signal to other assemblies in the system E xample the A7 PCB provides the IF Calibration signal to the A4 and A6 PCB s If the IF Cal signal is faulty error codes will be reported for the 4 and A7 5 NOTE An aide to troubleshooting system failures using error codes is a good understanding of system and subassembly operation Refer to the descriptions of system and subas sembly operation and block diagrams located in Chapter 7 System Description Error codes 0100 3999 with few exceptions are produced as a result of a failure when the system self test is run These error codes will not be displayed on the CRT screen Only the overall result of the self test PASS FAIL will be displayed at the conclusion of the self test How ever any error codes due to the self test will be written to the service log as the self test is executed NOTE The exceptions are error codes with 00 in thetwo least significant digits for example 0500 A D CONVER SION FAIL These errors are produced at run time if a prob
203. sembly power cable from connector J 1 of the A21A1 Source YIG Bias Control PCB Pull up gently on ribbon cable to disconnect Step 2 Similarly disconnect the Down Converter assembly power cable from connector J 4 of the A21A1 PCB Step 3 Disconnect the YIG Oscillator assembly power cable from connector 3 of the A21A1 PCB Pull up on the flexible cir cuit connector handle to disconnect Step 4 Remove the screw that fastens the front apron of the source module chassis to the heatsink of the A21A1 PCB SeeFig ure 8 16 8 32 373XXA MM REMOVE AND REPLACE SIGNAL SOURCE MODULES Step 5 Remove the four screws that fastens the back plate of the source module chassis to the heatsink of the A21A1 PCB Step 6 Place the Signal Source Module on its back plate Step 7 Unfasten the six PCB retainers on the bottom of the 21 1 PCB unfasten turn screwdriver slot turn coun ter clockwise Gently separate the A21A1 PCB including the heat sink from the Signal Source M odule To replace the A21A1 Source YIG Bias Control PCB assembly perform the steps above in the reverse order Switched Filter Use the following procedure to remove replace the Switched Filter as Assembly sembly Procedure Step 1 Disconnect the power cable from connector P1 at the rear of the Switched Filter assembly Use a small screw driver to pry up gently at each end of the connector as necessary Step 2 Disconnect the semi rigid coax
204. setup calibra tion can be stored and recalled from non volatile memory locations The current front panel setup is automatically stored in non volatile memory at instrument power down D 8 APPENDIX D When power is applied the instrument returns to its last front panel setup Internal Hard Disk Drive Used to store and recall mea surement and calibration data and front panel setups All files are MS DOS compatable File names can be 1 to 8 characters long and must begin with a character not a number Extensions are automatically assigned External SCSI Interface Option 4 deletes the internal hard disk drive and adds a SCSI Interface connector to the rear panel for connecting a SCSI 2 formatted hard disk drive Internal Floppy Disk Drive 3 5 inch diskette drive with 1 44 Mbytes formatted capacity is used to load mea surement programs and to store and recall measurement and calibration data and front panel setups All files are MS DOS compatable File names can be 1 to 8 charac ters long and must begin with a character not a number Extensions are automatically assigned Measurement Data 102 8 kbytes per 1601 point S parameter data file Calibration Data 187 3 kbytes per 1601 point S parameter data file 12 term cal plus setup Trace Memory File 12 8 kbytes per 1601 point channel GPIB GPIB INTERFACES 2 PORTS System GPIB IEEE 488 2 Connects to an external controller for use in remote programming of the n
205. sion of a decimal point in the exponent field an invalid character imbedded in the nu meric or no exponent value following the E Expected String Program Data Generated when a mnemonic is used that requires a trailing string data element The date element was either missing or no open quote character was found Missing close quote character Generated when a mnemonic is used that requires a trailing string data element The open quote character was found but the close quote character was not Expected Arbitrary Block data Generated when a mnemonic is used that requires a trailing arbitrary block data ele ment and the trailing element was not an arbitrary block data element Or in some cases the arbitrary block was empty Faulty Arbitrary Block Generated when a defined length arbitrary block data element is terminated early with an EOI or an indefinite length arbitrary block data element is not properly terminated Missing Program Data Separator Two data elements of a program mnemonic that requires multiple program data ele ments are not properly separated from each other by a comma 373 XXA MM APPENDIX SERVICE LOG ERROR MESSAGES Table B 3 GPIB Related Error Messages 2 of 8 Error Message Description GET received during PM recep tion Generated when the GPIB Command Group Execute Trigger is received during the reception of a program message but before its proper
206. st ER ear te eee Ste ee ee ae 52 3 7 Front Panel Test Failures 5 22 Functional Assembly Level Troubleshooting 1 5 G GPIB Interface Test 0 72 3 9 GPIB Interface Test Failures 5 22 GPIB Related Error Messages B 3 GPIB RELATED ERROR MESSAGES B 3 HAN Calibrations 5 Hard Disk Problem 1 3 72 5 8 Hard Disk 2 3 5 9 Hard Disk Problems 5 8 IDENTIFICATION NUMBER 1 3 IF Section E Vans FAC RI es bat Vua P Vert NO 7 11 Input Coupler s Low F req Bridge s 8 26 Installed Options sss n n nnn 4 Internal Hardware Adjustments and Calibration Sie Rao Cir a 1 5 Index 4 INDEX Internal VGA Monitor 7 19 Isolation Procedures Troubleshooting 5 19 K Keep Connectors Clean 4 KEY SYSTEM PARAMETERS 4 6 4 7 L LCD BACKLIGHT LAMP 8 17 LCD Test ort oa Ne gd adr Uu WR or is 3 6 Line Source and Interface Checks 5 4 LIQUID CRYSTAL DISPLAY LCD 8 16 LO 2 CALIBRATION sss nr n nn 6 4 01 CALIBRATION 2 6 3 Location of BBRAM Chip ontheA9PCB 8 9 Location of Floppy Disk
207. sts Check Match Directivity and Dynamic Range as described in Chapter 4 Performance Verification Complete the remaining checks described in Chapter 4 Per formance Verification Table 5 6 Typical Reference Signal Values in dBm Frequency SQM In SDM Out MUX J4 MUX J1 Buffer Amp In 20 GHz NA 18 6 26 37 2 20 4 28 40 2 19 14 28 50 GHz 18 NA NA 14 23 65 GHz 16 NA NA 10 26 Table 5 7 Typical Transfer Switch Voltages CW Single Channd Display Below 38 GHz Above 38 GHz Wire Color 21 12 21 12 Brown 2 0 3 3 2 0 2 0 Black 6 7 41 6 41 6 41 6 White 41 6 6 8 41 6 41 6 Grey 3 3 2 0 2 0 2 0 Figure 5 8 Typical SPDT Switch Voltages CW Single Channd Display Wire Color Forward Reverse Brown 1 2 3 7 Grey 3 7 1 2 5 24 373XXA MM TROUBLESHOOTING SIGNAL PATHS 2 20GHz YIG Oscillator gt 40MHz 2GHz 16 8 GHz Lowpass Filter 9 5 16 25GH J4 Switched Filter J5 LL t 15 dB Pad F 6 3 Down Converter 40MHz 8 3GHz z Test B 4 J3 SQM Forward SPDT Switch TestA x4 J2 SQM 19GHz Digital Data to Processor 2 SDM 40MHz 38GHz Reverse Test B 38 65 GHz Test A 38 65 GHz 37 GHz Hi
208. sweep directions A possible cause for this condition is a failure of the Power Amplifier assembly at certain frequencies Refer to Analog Subsystem Block Di agram in Figure 7 2 on page 7 6 LO1 This function allows user to verify whether the Al LO1 PCB is operat ing properly LO2 This function allows the user to verify whether the A2 LO2 PCB is op erating properly SOURCE This function allows the user to verify whether the Source Moduleis operating properly The procedures in the following paragraphs will help you isolatethe fault to the major assembly Proceed as follows Step 1 Press Option Menu key and select the DIAGNOSTICS menu option OPTIONS DIAGNOSTICS TRIGGERS START SELF TEST REAR PANEL DIAGNOSTICS PERIPHERAL TESTS MULTIPLE SOURCE CONTROL TROUBLESHOOTING FOR SERVICE PRESS ENTER TO NLY SELECT HW CALIBRATIONS FOR SERVICE NLY PRESS ENTER TO SELECT Step 2 Select the READ SERVICE LOG menu option to display the error entry associated with the system failure Observe the snap shot data included as part of the error entry and note the sweep direction indication for each error code Re fer to Table 5 3 SOURCE TEST SET RECEIVER 5 20 Check 2 TROUBLESHOOTING Step 3 Determine whether the failure occurs during forward mea surements S11 S21 and or reverse measurements S22 S12 If the problem occurs in both directions at all frequencies th
209. system A13 etc and the analog subsystem A1 A8 A21A1 A21A2 this is part of a minimal self test Conducts an IF Calibration Resets and loads the front panel state that was in effect prior to thelast power down Starts the measurement process NOTE The system software fully controls the 373XXA VNA sys tem after boot up with operator intervention and guid ance The system software is only loaded once upon initial power up Troubleshooting Tostart the troubleshooting of boot up related problems perform the Boot up Problems following preliminary checks Hard Disk Problem 1 1 Note any error messages displayed on the CRT display during the boot up process Observe the front panel and the display during the boot up pro cess for information as to which part of the process failed or did not execute Verify that the system power supplies are working properly as per paragraph 5 4 above Note particularly the operation of power supplies immediately after power up Try to boot the instrument from the floppy disk and repeat steps 1 and 2 above U pon completion of the preliminary checks above perform the fol lowing procedures as appropriate If a hard disk problem is indicated during bootup from a floppy disk but the system can bootup correctly from the hard disk Step 1 Boot up from the hard disk then format the Hard Disk us ing the procedure bel ow CAUTION Formatting the hard disk will erase all
210. termination with the end mes sage The partial program message up to but not including the Group Execute Trig ger will be executed Execution of the Group Execute Trigger and any subsequent program message elements received before the end message will be skipped 7205 GPIB EXECUTION ERROR DESCRIPTIONS Not permitted in a DDT com mand sequence When executing a defined device trigger command sequence a forbidden command was detected Too much Arbitrary Block data The arbitrary block supplied contained more data than was necessary for the currently defined 373XXA state This can occur when graph types start stop frequencies or data points are changed Insufficient Arbitrary Block data The arbitrary block supplied did not have enough data for the currently defined 373XXA state This can occur when graph types start stop frequencies or data points are changed Invalid parameter for current graph type An attempt was made to program a non existent parameter for the current graph type For instance a Smith chart does not have a reference or reference line position mne monics OFF and REF Parameter out of range An attempt was made to program an out of integer range value for a parameter This error is detected by the GPIB MANAGER when converting and rounding to the appro priate integral size signed unsigned char short or long Parameter value not permitted A parameter value was not found in the
211. the reverse order W81 for Models 37269B Never operate unit with A21A2 J 3 discon nected Refer to Caution statement on 373XXA MM REMOVE AND REPLACE SIGNAL SOURCE MODULES Captive Screws A21A2 Source _ Control PCB gide Rail Mounting Screws Figure 8 15 Signal Source Module Removal D ails A21A2 Source Control Use the following procedure to remove replace the A21A2 Source Con PCB trol PCB assembly Procedure Step 1 nfasten the two PCB retainers at the top corners of the A21A2 Source Control PCB see Figure 8 16 To unfasten turn screwdriver slot turn counter clockwise Step 2 Pull thetop of the A21A2 PCB away from the source mod ule chassis back plate to clear PCB retainers Gently pull up to disconnect the A21A2 PCB from the socket on the A21A1 Source YIG Bias Control PC Remove from Source Module replace the A21A2 Source Control PCB assembly perform the steps above in the reverse order 373XXA MM 8 31 SIGNAL SOURCE MODULES REMOVE AND REPLACE _ A21A2 Source Control PCB Switched Filter Down Converter 7 Source YIG Bias Control PCB 2 20 GHz YIG Oscillator Assembly Figure 8 16 Signal Source Module Assemblies Removal Details A21AlSourceYIG Use the following procedure to remove replace the A21A1 Source YIG Bias Control PCB Bias Control PCB assembly Procedure Step 1 Disconnect the Switched Filter as
212. the associated A31 connector number Step 3 Disconnect the two cable connectors from the TEST A con nector body on the Buffer Amplifier Sampler assembly see Figure 8 14 Similarly disconnect the two cable connectors from the REF A connector body 373XXA MM 8 27 TEST SET MODULE ASSEMBLIES Switched Doubler Module Assembly REMOVE AND REPLACE NOTE The matching pin numbers are identified on the cable con nectors and on the connector body Step 4 Repeat Step 3 for the TEST B and REF B cable connectors Step 5 Remove the nine screws that fasten the Buffer Amplifier Sampler assembly to the test set tray and lift the assembly from the Test Set Module To replace the Buffer Amplifier Sampler assembly perform the steps above in the reverse order Use the following procedure to remove replace the Switched Doubler Module SDM assembly for Model 37269B Procedure Step 1 Disconnect the SDM power cable from connector J 17 of the A17 Motherboard PCB Free cable from cable clip as neces sary A31J8 TESTA Connector Body Connector Body B OJ6 999000 _ 000000 7 NN OJ5 REFA p Nu m0 TEST A AEN QNS uie QN o o gt O 6 amp W145 UE S yn poc oe A A 132 C Qj Q
213. the blue plastic washer under the screw head Step 4 Gently move the monitor assembly to the rear and lift away from chassis with cables still attached Place on work surface next to unit To replace the Internal VGA Display Monitor assembly perform the steps above in the reverse order 2PL Figure 8 7 Location of Internal VGA Monitor Assembly Mounting Screws 373XXA MM 8 15 LIQUID CRYSTAL DISPLAY LCD REMOVE AND REPLACE 8 10 LIQUID CRYSTAL This paragraph provides instructions for removing and replacing the DISPLAY LCD internal LCD assembly NOTE It is not necessary to remove the front panel assembly to perform this procedure Preliminary Switch 373XXA power off Remove the power cord Remove all covers paragraph 8 3 Remove Replace Procedure Step 1 Step 2 Step 3 Step 4 Step 5 Placethe 373XXA on its right side monitor down Disconnect the connector from LCD back light driver PCB Assembly and
214. the internal software Service Log Table B 1 provides a listing and description of the operational error messages For the most part these errors are displayed only on the 373XXA display and are caused by incorrectly operating the 373XXA Table B 2 provides a listing and description of the disk related error messages The numbered errors in this group are also written to the Service Log since they may indicate system problems Table B 3 provides a listing and description of GPIB related error mes sages These errors are entered in the Service Log and output as part of the response of OGE OGL commands Table B 4 provides a listing of the error messages that are written to the internal system service log Some of these messages may occur as a result of incorrectly programming the 373XXA This indudes the GPIB errors 7204 7207 and errors in the 5000 range RF Power The RF Power errors may betriggered when setting the 373XXA power to a value greater than its reset level This feature of the 373XXA lets you take advantage of all available power however accuracy cannot be guaranteed when power is unleveled Refer to Chapter 5 para graph 5 6 for additional guidance in interpreting these error codes The error messages in Table B 4 are numbered and organized as fol lows These messages generally indicate status or a pass fail result of a Pe ripheral or Self test These messages primarily indicate a self test failure with the suspect
215. tions in this manual needed to accomplish the serv ice functions required for the 373XXA VNA Appendices Refer to the Appendices at the rear of this manual for de tailed descriptions of the following Diagnostics Menus and GPIB Commands Error Messages System Block Diagrams Parts Locator Diagrams The 373XXA modular design extensive built in diagnostics and auto mated service tools are designed to support fast exchange of functional as sembly level repairs Failed assemblies are not field repairable Once assembly is found to be faulty it should be returned to an authorized ANRITSU Service Center for exchange Refer to the description of the Exchange Assem bly Program in Chapter 2 Replaceable Parts The procedures for troubleshooting a failed 373XXA VNA are de scribed in this manual in Chapter 5 Troubleshooting There are five automated internal hardware field calibrations Two of them are used to characterize the 373XXA frequency and power genera tion sub systems These calibrations insure fast consistent phase lock of system frequencies and proper compensation leveling and flatness of system power at the front pane test ports To conduct these calibrations you need only connect the appropriate test equipment counter or power meter to the 373XXA and initiate the calibration The 373XXA will control itself and the externally con nected test equipment to perform measurements and store cali
216. torage Temperature Range 40 to 75 C Operating Temperature Range 0 to 50 C Relative Humidity 5 to 95 at 40 C EMI Meets the emissions and immunity requirements of EN55011 1991 Class A CISPR 11 Class A EN 50082 1 1993 IEC 801 2 1984 4 kV CD 8kV AD IEC 1000 4 3 1995 3 V m 80 1000 MHz IEC 801 4 1988 500V SL 1000V PL IEC 1000 4 5 1995 2 kV L E 1kV L L GAIN COMPRESSION MEASUREMENT CAPABILITY The 373XXA simplifies amplifier Gain Compression and AM PM measurements Once an appropriate power and frequency schedule is selected a power meter calibration at a set level will calibrate the linear VNA receiver chan nels to accurately measure power in dBm The 37300A supports the HP437B and Giga tronics 8540B series power meters To measure power b2 1 a user defined pa rameter is automatically selected Swept Power Gain Compression The 373XXA will dis play traditional Power out vs Power in or Phase vs Power in at one of up to 10 selectable frequencies A separate screen will easily show Power out and Power in at 1 dB or selected level Gain Compression for all entered frequen cies Check figure below Swept Frequency Gain Compression Once Gain is measured at the starting power the user increments Power in observing Normalized Gain vs Frequency This aids in 373XXA PERFORMANCE SPECIFICATIONS analyzing the most critical compression frequencies of a broadband amplifier CH1 ba
217. ttom View 37397A 373XXA MM 2 11 REPLACEABLE PARTS PARTS ORDERING INFORMATION 28 gt amp 5 5 85 E 2 58 qo 8 T a 2 y 5 Yo V C7 or E ms 2 d vs N X JIS A f S NN N N a s SNN X V 2 J Nes N y 2 um N 0 ff N Y N v lt gt fo 2 20 GHz YIG Oscillator Assembly Figure 2 4 Signal Source Parts Location Diagram 373XXA MM 2 12 Chapter 3 Operational Tests Table of Contents 3 1 3 2 3 3 3 4 INTRODUCTION ee 3 3 CHECKING THE SERVICE LOG nne 3 4 SELF TEST mmm mm ee 3 5 PERIPHERALS AND INTERFACES 3 6 LCD Test ae Bs day iat Obey Rat 3 6 Front Panel Test lat p Cac tah tery ae at tay 3 7 External Keyboard Interface Test 56 sn 3 7 Printer Interface Test ene UN acp GEN e VA TION re tas Gata SR 3 7 GPI B nterface Test fap ced b 3 9 SIGNAL PATH eee 3 10 1 INTRODUCTION 373XXA MM Chapter 3 Operational Tests Thetests in this section provide a me
218. ty oscillator as sembly mounted above Power supply M odule to tor J 1 of A7 PCB Disconnect at A7 J 1 end W Locate power cable from the high stability oscillator as sembly to A17 Motherboard connector J 18 Disconnect at A17 J 18 end Placethe373XXA in normal top side up position Gently pull rear panel assembly away from chassis and lay flat on 373XXA MM REMOVE AND REPLACE 8 13 FAN ASSEMBLY 8 14 POWER SUPPLY MODULE 373XXA MM FAN ASSEMBLY work surface Remove cables from cable harnesses as re quired To replace the Rear Panel Assembly perform the steps above in there verse order This paragraph provides instructions for removing and replacing the Rear Panel Fan Assembly Preliminary Switch373XXA power off Remove the power cord Remove all covers paragraph 8 3 Remove Rear Panel paragraph 8 12 Remove Replace Procedure Step 1 Placethe 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 Rear Panel Assembly over and remove the four screws that fasten the fan guard and fan assembly to the rear panel See Figure 8 10 Step 4 Remove the fan guard and separate the fan from the rear panel To replace the Rear Panel Fan Assembly perform the steps above in the reverse order This paragraph provides instructions for removing and replacing th
219. ues for the parameter Standard cal method not valid for waveguide In a waveguide type of calibration the standard OSL cal method is forbidden Out of calibrated range An attempt was made to change a parameter not permitted to be changed with correc tion on Start must be must be less than stop An attempt was made to set a new start frequency distance or time greater than or equal to the current stop frequency distance or time Or to set a new stop frequency distance or time less than or equal to the current start frequency distance or time Tune mode requires a 12 term calibration Perform a 12 term calibration prior to turning on tune mode B 10 373XXA MM APPENDIX SERVICE LOG ERROR MESSAGES Table B 3 GPIB Related Error Messages 4 of 8 Error Message Description Current and cal frequencies dif ferent The flat power calibration setup does not match the current setup Stored data is invalid An attempt was made to reference normalized data when normalized data was invalid Parameter change not permitted on current state An attempt was made to change a parameter while IF cal was active It is not ex pected that this message will ever be seen If you see this message notify the fac tory Calibration may not be valid An attempt was made to repeat the previous calibration when there was no record of a previous calibration Calibration does not exist
220. uffer Buffer Amp 8 or Amp Failure 4 Failure 8 C 7 NL P Figure 5 2 Error Code DE Lock Failure Troubleshooting 37397A 3 of 3 5 16 373XXA MM TROUBLESHOOTING 5 7 souncE EST SET RECEIVER Signal Source Phase Lock Loop Assemblies 373XXA MM SOURCE TEST SET RECEIVER Because of the 373XXA phase lock loop structure it is not easy to distin guish between failures that occur in the Source Module the Test Set Module and the Receiver Module In order to troubleshoot failures occur ring in this group of modules it is essential to befamiliar with how each module functions and how it interacts with the other modules Refer to Chapter 7 System description for a functional description of each mod ule For Model 37397A refer to Figure 5 3 and Figure 5 4 rear of section for aid in troubleshooting Test and Source Lock signal paths Refer alsoto Table 5 6 rear of section for a list of typical reference signal values and to Tables 5 7 and 8 for Transfer and DPDT Switch Volt ages The 373XXA assemblies that contain circuits that are part of the sig nal source phase lock loop Source Lock function are listed in Table 5 4 Table 5 4 Phase Lock Loop Assemblies Assemblies Location A21A1 Source YIG Bias PCB Source Module A21A2 Source Control Source Module YIG Oscillator Source Module Switched Filter Source Module Down Converter Source Mod
221. ule Switched Doubler Module SDM Test Set Module Transfer Switch Test Set Module Buffer Amplifier Receiver Module A1 LO1 PCB Receiver Module A2 LO2 PCB Receiver Module A4 Reference IF PCB IF Section A8 Source Lock Signal Separation Control PCB Analog Subsystem A9 Main Processor PCB Digital Subsystem Model 37369A only See Figure 5 4 for 37397A models Failures occurring in the Source Module Test Set Module and Re ceiver Module will generally cause the system to produce Phase Lock Fail error codes Included with the Phase Lock Fail error codes are al phabetical suffixes that indicate the probable malfunctioned sub assembly Example 6008 PHS LCK FAIL D 5 17 SOURCE TEST SET RECEIVER 5 18 Signal Source Test Set Module Error Codes TROUBLESHOOTING The letter D in the error code above indicates that the failure is pos sibly in the Source Module Refer to Table 5 3 Failures occurring in the Signal Source Module and Test Set Module will also produce the error codes listed in Table 5 5 Table 5 5 Signal Source Test S amp Module Error Codes Error Codes Possible Failed Assemblies 5110 RF PWR UNLEVELED All components in Source Module and Test Set Module 5210 REF A CHAN RF OVERLOAD Transfer Switch 5220 REF B CHAN RF OVERLOAD Transfer Switch 5230 TA CHAN RF OVERLOAD Transfer Switch or A21A2 PCB 5240 TB CHAN RF OVERLOAD Transfer Switch or A21A2 PCB NOT
222. vironment Considerations 4 6 Measurement Technique dn qo QR ae 4 7 4 1 4 2 373 4 1 4 2 CALIBRATION AND MEASUREMENT CONDITIONS Standard Conditions 373XXA MM Chapter 4 Performance Verification This chapter provides specific procedures to be used to verify that the 373XXA is making accurate traceable S parameter measurements You should perform the verification procedures in paragraph 4 3 Verifying Measurement Accuracy at least once annually Additionally this chapter includes procedures that may be used to measure the following key system performance parameters Effective Source Match Effective Directivity System Dynamic Range Frequency Accuracy Power Level Accuracy The Operational Tests described in Chapter 3 should be performed prior to verifying system performance Please ensure you have read and fully understand the servicing con cepts for the 373XXA presented in Chapter 1 prior to continuing with this chapter Extremes in the surrounding environmental conditions and the condition and stability of the test port connectors through cable and calibration kit determine system measurement integrity to a large extent These are all user controlled conditions and as such should be evalu ated periodically for impact on system performance If these conditions vary si
223. ximum number of data points in discrete fill is 1601 Not enough data points for Dis crete Fill The minimum number or data points in discrete fill is 2 Discrete Fill end frequency out of range The number of points for discrete fill puts the end frequency out of range Step is too large When setting up a time domain harmonic sweep cannot get 2 data points because the start frequency is too high for the approximate stop frequency In a group delay display the delay aperture percent of sweep is less than one step size Range too small An attempt was made to set a distance or time span value too small This can also be done via inappropriate values for start and stop Start or stop out of range An attempt was made to set a distance or time start or stop value out of range This can also be done via inappropriate values for center and span No bands defined An attempt was made to turn on multiple source mode with no band definitions Out of frequencies for new band definition Source out of range by equation External source out of range by equation The current set of multiple source mode bands use up all the frequency range of the 373XXA Therefore no more bands can be defined File is read only An attempt was made to write to a write protected file File not found An attempt was made to access a non existent file Floppy drive not ready An attempt was made to access the floppy
224. z Accuracy Error in Phase deg Error 360 t x Aperture Freq Error Hz Aperture Hz VECTOR ERROR CORRECTION There are five methods of calibration 1 Open Short Load OSL This calibration method uses short circuits open circuits and terminations fixed or sliding 2 Offset Short waveguide This calibration method uses short circuits and terminations 3 LRL LRM The Line Reflect Line LRL or Line Reflect Match LRM calibration uses transmission lines and a reflective device or termination LRM 4 TRM Thru Reflect Match calibration uses short circuits and fixed termination 5 AutoCal The VNA will serially drive an external AutoCal module to perform a 2 port OSLT calibration AutoCal is a single two port calibration module with built in switched and characterized OSLT standards AutoCal provides quick reliable and accurate calibra tions that exceed the performance of a standard broad band load OSLT calibration There are four vector error correction models available 1 Full 12 Term 2 One Path Two Port 3 Frequency Response Transmission Reflection 4 Reflection Only Full 12 term can always be used if desired since all 373XXA series models automatically reverse the test sig nal Front panel display indicates the type of calibration stored in memory Front panel button selects whether cali bration is to be applied and an LED lights when error cor rection is being ap

Anritsu 373xxA 40GHz Vector Network Analyzer

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