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Wiltron 360B System Maintenance Manual

Vector network analyzer
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Table of Contents

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Download this manual See also: Programming Manual
MODEL
360B
VECTOR NETWORK ANALYZER
SYSTEM MAINTENANCE MANUAL
490 JARVIS DRIVE
MORGAN HILL, CA 95037-2809
P/N: 10410-00116
REVISION: D
PRINTED: SEPTEMBER 1995
COPYRIGHT 1992 WILTRON CO.

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  • Page 1 MODEL 360B VECTOR NETWORK ANALYZER SYSTEM MAINTENANCE MANUAL 490 JARVIS DRIVE MORGAN HILL, CA 95037-2809 P/N: 10410-00116 REVISION: D PRINTED: SEPTEMBER 1995 COPYRIGHT 1992 WILTRON CO.
  • Page 2 WARRANTY The WILTRON product(s) listed on the title page is (are) warranted against defects in materials and workmanship for one year from the date of shipment. WILTRON’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 WIL- TRON for warranty repairs.
  • Page 3 MANUAL CHANGE MANUAL: Title: Model 360B System Maintenance Manual Part Number: 10410-00116 Rev. Ltr/Date: D CHANGE PACKET Part Number: 10900-00176 INSTRUCTIONS 1. Make all changes, which are listed in numerical order by page number. 2. Replacement pages are provided for all changes. The black bar or bars in the margins of the replacement page show the area in which the changes were made.
  • Page 4 TABLE OF CONTENTS Chapter 1 — General Information Provides general information about the 360B Vector Network Analyzer system, which includes a list of related manuals, service information, static handling procedures, and a list of recommended test equipment. Chapter contents are detailed immediately following the tab.
  • Page 5 Describes the 360 ACM. Appendix contains full service and troubleshooting information, which includes description, block diagram, troubleshooting, performance tests, adjustments, and remove and replace procedures. Appendix contents are detailed immediately following the tab. Subject Index Provides a subject index. 360B MM...

  • Page 6: Table Of Contents

    Chapter 1 General Information Table of Contents SCOPE OF MANUAL ..... . 1-3 INTRODUCTION ......1-3 IDENTIFICATION NUMBER .
  • Page 7 Figure 1-1. Model 360B Vector Network Analyzer System (Shown installed in Model 360C1 System Console...

  • Page 8: Scope Of Manual

    This manual provides general and service information for the Model 360B Vector Network Analyzer (VNA) system (Figure 1-1). (Through- out this manual, the terms 360B VNA and 360B will be used inter- changeably to refer to the system.) Manual organization is shown in the narrative Table of Contents that precedes this chapter.
  • Page 9 Provides a tutorial for quickly getting started 10410-00111 Vector Network making measurements with the 360 VNA Analyzer Getting system. Manual is bound with the 360B OM, Started Guide but can be ordered separately. Model 360B Vector Provides programming information for the...
  • Page 10 A14 Power Supply Control PCB Assembly D36965-3 A15 Power Supply Convertor PCB Assembly D37574-3 A16 Test Set I/O PCB Assembly D34656-3 A18 Power Supply Motherboard ND39332 Front Panel Assembly 360B, includes disk drive ND39331 Color Display VGA Assembly 360B MM Changed: April 1996...
  • Page 11 A24T Source Lock / Reference Select Assembly D17900 A25T RF Splitter 3600 RF Components, 40 GHz and below D21854 A8T Buffer Amplifier Assembly Channel B, 3611A, 3621A, 3630A D21853 A10T Buffer Amplifier Assembly, Channel A, 3611A, 3621A, 3630A 360B MM Changed: April 1996...
  • Page 12 A25T RF Splitter D21360 A28T/A29T SPDT/Splitter C23356 A30T Channel B Tripler Assembly, 60 GHz, Includes 1000-37 Isolator, 1040-15 Tripler, D21319 Mux coupler, C21372 Amplifier and C21382 High Pass Filter. This must be replaced as an entire assembly. 360B MM Changed: April 1996...
  • Page 13 Auxiliary Power Connector (rear panel) *These components are not on the module exchange program; however, they may be ordered as standard replacement parts. ** Requires factory installation and test. Not available for field service use. 360B MM Changed: April 1996...

  • Page 14: Service Information

    ND39322 Down Converter Assembly, cabled C8090-5 ND39329 PIN Switch Assembly, 360SS69 ND39325 DPDT PIN Switch, 8-26.5 GHz *These components are not on the module exchange program; however, they may be ordered as standard replacement parts. 360B MM Changed: April 1996...

  • Page 15: Static Handling

    CAUTION WILTRON highly recommends that you use a grounded wrist strap when handling 360B VNA System PCBs and components. The 360B VNA system contains parts that can be damaged by static electricity. 1-10 360B MM Changed: April 1996...
  • Page 16 Keep workspaces clean and free of any objects capable of holding or storing a static charge. • Connect soldering tools to an earth ground. • Use only special anti-static suction or wick-type desoldering tools. Figure 1-2. Static Handling Procedures 360B MM 1-11...

  • Page 17: Recommended Test Equipment

    RECOMMENDED GENERAL TEST EQUIPMENT INFORMATION RECOMMENDED TEST Table 1-3 lists the recommended test equipment for maintaining and EQUIPMENT servicing the 360B VNA system. Table 1-3. Recommended Test Equipment (1 of 2) Instrument Critical Specification Recommended Manufacturer/Model Spectrum Frequency: Tektronix, Inc. Model 494P,with 0.01 to 60 GHz...
  • Page 18 3655Q, 3655U, 3655V, or 3655W, (For use with Model 3635B depending on Model 364XB-X Test Set, only) Module being used. (Included with Model 360B VNA System) Microwave Frequency: 18, 40, 60, or WILTRON Company Cable 65 GHz, depending on...
  • Page 19 Chapter 2 360B VNA System Table of Contents INTRODUCTION ......2-3 SYSTEM DESCRIPTION ....2-4 SYSTEM COMPONENTS .

  • Page 20: Introduction

    Chapter 2 360B VNA System INTRODUCTION This chapter describes the Model 360B Vector Network Analyzer Sys- tem. The description is organized into an overall description, a descrip- tion of system components, and a discussion on system operation. Chapters 3 and 4 respectively provide information for verifying per- formance and troubleshooting the system.

  • Page 21: System Description

    Signal Source Test Set Vector Network Analyzer (VNA) Figure 2-1 shows the 360B VNA system configuration and illustrates the interconnections between the signal source, test set, and VNA. The following paragraphs contain brief descriptions of each system component. Signal Source The signal source provides the stimulus to the DUT via the test set.

  • Page 22: System Components

    SYSTEM BUS VECTOR NETWORK ANALYZER EXT FM ∅ LOCK OUTPUT SIGNAL CONTROL PORT 1 PORT 2 RF INPUT GPIB TEST SET SEMI-RIGID COAXIAL CABLE PHASE LOCK INPUT SIGNAL SOURCE POWER RF OUTPUT Figure 2-1. 360B VNA System Interconnections 360B MM...

  • Page 23: The Test Set

    SYSTEM The Test Set The test set contains the measurement components for the 360B VNA system. The test set, under direct control of the VNA, performs the following: Stimulus signal routing from the signal source to the DUT through one of the test ports (Port 1 or Port 2).
  • Page 24 360B VNA SYSTEM SYSTEM OPERATION SYSTEM OPERATION During a typical measurement, the microwave signal source, under di- rect control of the VNA, outputs an RF signal to the test set to provide stimulus to the DUT (Figure 2-2). The system signal source is phase- locked with the VNA’s internal 10 MHz crystal oscillator.

  • Page 25: System Operation

    SYSTEM 360B VNA OPERATION SYSTEM Additional signal processing is implemented within the VNA. The mag- nitude and phase information embedded on the analog IF signals is first detected, then converted to digital data. The VNA processors, con- trolled by embedded firmware coupled with system software, manipu- late this digital data.
  • Page 26 OSCILLATOR GRAPHICS M. B. CONTROL PROCESSOR 10 MHz NEC 7220 P. S. TEST SET TEST SET BLANKING/ CONVERTER INTERFACE SYNC. COMPOSITE VIDEO OUT PHASE LOCK P.S. EXTERNAL RGB OUT CONTROL Figure 2-2. 360B VNA System Block Diagram 360B MM 2-9/2-10...
  • Page 27 Chapter 3 360B VNA System Performance Tests and Adjustments Table of Contents INTRODUCTION ......3-3 TEST EQUIPMENT ..... . . 3-3 PERFORMANCE TESTS AND ADJUSTMENTS —...
  • Page 28 Table of Contents (Continued) EFFECTIVE SOURCE MATCH TEST, MODELS 361XA/362XA ............................................3-25 Test Setup .
  • Page 29 Table of Contents (Continued) 3-17 MAGNITUDE TRACKING TEST, MODELS 3630A/3631A . . 3-49 Test Setup ......3-49 Test Procedure .

  • Page 30: Introduction

    360B VNA System Performance Tests and Adjustments INTRODUCTION This chapter provides performance tests and adjustments for the 360B analyzer unit and test sets. Performance tests and adjustments for the 360XX Signal Source are provided in Chapter 10. TEST EQUIPMENT Recommended test equipment and manufacturer is listed in Chapter 1, Table 1-3.

  • Page 31: Performance Tests, Models 361Xa/362Xa

    These tests do not establish measurement traceability; such verifica- tion requires using an appropriate WILTRON verification kit. Success- ful completion of these procedures indicates that your 360B VNA sys- tem is operating properly and is capable of making accurate measurements.

  • Page 32: Sampler Efficiency Test, Models 361Xa/362Xa

    S M O O T H M E M O R Y M E N U Menu Choice Test Setup Setup 360B VNA as described below. SETUP START: 500 MHz Step 1. Connect Test Ports 1 and 2 together (be-...
  • Page 33 PRESS <ENTER> OR SWITCH 0123456789_/* TO SELECT DEL CLEAR DONE TURN KNOB TO INDICATE CHARACTER OR FUNCTION PRESS <ENTER> TO SELECT NUMBERS MAY ALSO BE SELECTED USING KEYPAD Figure 3-1. Redefining Selected Parameter Manually for Sampler Efficiency Testing 360B MM...
  • Page 34 INSTALLED USE ONLY) OUTPUT NON-RATIOED TESTS DIAGNOSTICS PARAMETERS PRESS <ENTER> MULTIPLEXER PRESS <ENTER> TO SELECT CONTROL TO SELECT MULTIPLE SOURCE CONTROL RECEIVER MODE PRESS <ENTER> TO SELECT Figure 3-2. Redefining Selected Parameter Automatically for Sampler Efficiency Testing 3-10 360B MM...

  • Page 35: Test Procedure

    3625A –42 –42 –54 –54 however, if the 360B does not display a 301 LOCK FAILURE error, they are acceptable. NOTE Use the MARKER MENU and READOUT MARKER keys (middle left) and menus to obtain precise frequency and amplitude values.
  • Page 36 SAMPLER EFFICIENCY TEST, PERFORMANCE TESTS AND MODELS 361XA/362XA ADJUSTMENTS Figure 3-3. Sampler Efficiency Test Waveforms 3-12 360B MM...

  • Page 37: High Level Noise Test, Models 361Xa/362Xa

    MODELS 361XA/362XA will not significantly affect the accuracy of subsequent measurements. High-level noise is the random noise that exists in the 360B VNA Sys- tem. Because it is non-systematic, it cannot be accurately predicted or measured. Thus, it cannot be removed using conventional error-correc- tion techniques.

  • Page 38: Test Procedure

    Step 13. Connect a Short to Test Port 1 and an TEST S H OR T PORT 1 Open to Test Port 2 (left). TEST O P E N PORT 2 Step 14. Repeat steps 2 thru 9. 3-14 360B MM...
  • Page 39 PERFORMANCE TESTS AND HIGH LEVEL NOISE TEST, ADJUSTMENTS MODELS 361XA/362XA Figure 3-4. High Level Noise Test Waveform 360B MM 3-15...

  • Page 40: System Dynamic Range Test, Models 361Xa/362Xa

    Press BEGIN CAL key (left). Step 2. Using the menu prompts, perform a Full 12-Term SLIDING LOAD calibration over the full system operating range. (If necessary, refer to the 360B OM, Chapter CALIBRATION 8, for detailed procedures.) FULL 12 TERM...

  • Page 41: Test Procedure

    MIN, press the ENTER key, and record the value. MARKERS/LIMITS Step 8. Substract value in step 7 from that in step 6. To reduce measurement uncertainty, en- sure that the difference is greater than MARKER READOUT LIMITS 15 dB. MENU MARKER 360B MM 3-17...
  • Page 42 SYSTEM DYNAMIC RANGE TEST, PERFORMANCE TESTS AND MODELS 361XA/362XA ADJUSTMENTS Figure 3-5. Dynamic Range Test Waveform 3-18 360B MM...
  • Page 43 –85 3622A 0.04 –85 3625A to 50 GHz –101 Active Device 20.0 –89 Test Set 40.0 –79 50.0 –70 60.0 –65 3623A 0.04 –85 Active Device –101 Test Set 20.0 –89 40.0 –79 60.0 –65 65.0 –60 360B MM 3-19...

  • Page 44: Effective Directivity Test, Models 361Xa/362Xa

    Ensure that the APPLY CAL key indicator RESOLUTION: 1.0 dB/Div is on. SCALE REF VALUE: -15.0 dB (or value of Step 3. Set up the network analyzer as shown in termination offset) the table at left REFERENCE LINE: TOP PARAMS 3-20 360B MM...

  • Page 45: Test Procedure

    MARKER low Reference” column. Add the value from this column (Example: 37) to the >REF = value that appears on the 360B measurement screen. This is the effective directivity value for PORT 1 (52 db for the example: 37 + 15 = 52).
  • Page 46 EFFECTIVE DIRECTIVITY TEST, PERFORMANCE TESTS AND MODELS 361XA/362XA ADJUSTMENTS Figure 3-6. Effective Directivity Test Waveform 3-22 360B MM...
  • Page 47 Step 12. Press the S PARAMS key and change to 50.0 >34 S22. 60.0 >34 65.0 >32 Step 13. Move the Air Line and Offset to Test Port 2. Step 14. Repeat steps 4 through 10 for the S rameter. 360B MM 3-23...
  • Page 48 –0.0195 0.0389 1.0040 0.0020 0.0173 –0.0173 0.0347 1.0036 0.0018 0.0154 –0.0155 0.0309 1.0032 0.0016 0.0138 –0.0138 0.0275 1.0028 0.0014 0.0123 –0.0123 0.0245 1.0025 0.0013 0.0109 –0.0109 0.0219 1.0022 0.0011 0.0097 –0.0098 0.0195 1.0020 0.0010 0.0087 –0.0087 0.0174 3-24 360B MM...

  • Page 49: Test Setup

    Step 2. Ensure that the APPLY CAL key indicator GRAPH LOG MAGNITUDE is on. TYPE Step 3. Set up the network analyzer as shown in RESOLUTION: the table at left. 0.02 dB/DIV SCALE REF VALUE: 0 dBm S-PARAM 360B MM 3-25...

  • Page 50: Test Procedure

    Reference” column. Add the value MARKER READOUT LIMITS MENU MARKER from this column to the >REF = value that appears on the 360B measurement screen. This is the effective source match value for PORT 1 . 3-26 360B MM...
  • Page 51 PERFORMANCE TESTS AND EFFECTIVE SOURCE MATCH TEST, ADJUSTMENTS ‘ MODELS 361XA/362XA Figure 3-7. Effective Source Match Test Waveform 360B MM 3-27...
  • Page 52 Step 12. Press the S PARAMS key and change to 50.0 >28 60.0 >28 S22. 65.0 >26 Step 13. Move the Air Line and Short to Test Port 2. Step 14. Repeat steps 4 through 10 for the S rameter. 3-28 360B MM...

  • Page 53: Required Equipment

    Perform the following steps before starting the per- CONTROL UNIT System Setup formance tests. TEST SET UNIT Step 1. Verify that the 360B VNA system has been installed per Chapter 2–Installation SIGNAL of the Model 360B VNA Operation Man- SOURCE UNIT ual (P/N 10410-00110). Step 2.

  • Page 54: A5T And A4T Pcb Adjustments

    (below). If it is, the A5T PCB is adjusted properly. Step 5. Select LO 1 DAC on displayed VNA menu. Step 6. Set the rotary knob on the T1512 to D/A 1 (bottom left). D/A1 3-30 360B MM...
  • Page 55 (green cursor) in the waveform displayed on the VNA (bottom left). Also, ensure the amplitude is +12V (6 divisions). If it is, perform the LO 2 adjustment, below; if not, replace the A4T PCB. 360B MM 3-31...
  • Page 56 MODELS 361XA/362XA ADJUSTMENTS LO 2 Adjust LO 2 as follows: Adjustment Step 1. Turn off power to the 360B system. Step 2. Disconnect cabling and remove test set from console or cabinet. Step 3. Reconnect cable between CONTROL con- nectors on VNA and test set.
  • Page 57 MODELS 361XA/362XA R9 R12 LO 1 Adjust LO 1 as follows: Adjustment Step 1. Turn off power to the 360B system. Step 2. Disconnect cabling and remove test set from console or cabinet. Step 3. Reconnect cable between CONTROL con- nectors on VNA and test set.
  • Page 58 (left). Step 18. Remove the T1512, replace test set covers, and reinstall test set in console or cabinet. Step 19. Verify that LO 1 is still within the limit lines. 3-34 360B MM...

  • Page 59: Performance Tests, Models 3630A/3631A

    PERFORMANCE This tab section contains five performance tests that can be used to ver- TESTS, MODELS ify Model 360B VNA system operation using the 3630A or 3631A Test 3630A/3631A Set. Setup instructions and performance procedures are included for each test. Test results can be compared with the specified limits that are provided for each test.

  • Page 60: Full-Band Performance Test, Models 3630A/3631A

    S M O O T H M E M O R Y M E N U CHANNEL SINGLE CHANNEL MENU Test Setup Setup 360B VNA as described below. GRAPH LOG MAGNITUDE (All four channels) TYPE Step 1. Connect cable between SOURCE LOCK...
  • Page 61 CHANGE SELECT PRESS <ENTER> PHASE LOCK PHASE LOCK TO SELECT REFERENCE CHANGE LABEL 1 (UNITY) PRESS <ENTER> TO SELECT PRESS <ENTER> OR SWITCH TO SELECT PRESS <ENTER> TO SELECT Figure 3-8. Redefining Selected Parameter for Full-Band Testing 360B MM 3-37...

  • Page 62: Test Procedure

    SOURCE LOCK INPUT. Step 9. Press CH 4 key. Step 10. Observe that trace has power slope simi- lar to that shown in Figure 3-9, and that no power holes (10 dB or greater) exists anywhere on trace. 3-38 360B MM...
  • Page 63 PERFORMANCE TESTS AND FULL-BAND PERFORMANCE TEST, ADJUSTMENTS MODELS 3630A/3631A Figure 3-9. Full-Band Test Waveform 360B MM 3-39...
  • Page 64 3630A/3631A The adjusted power settings will be used in later procedures to verify compression setting, noise floor, and magnitude tracking. Test Setup Setup 360B VNA as described below. Step 1. Connect cable to RF OUT connector; leave other end unterminated.

  • Page 65: Set Source Power Level, Models 3630A/3631A

    Step 13. Record SOURCE 1 PWR setting in Table 3-5. Step 14. Repeat steps 9 thru 13 for 20 GHz, 40 GHz, and 60 GHz — as applicable. NOTE Set Cal Factor on power meter as required for each frequency. 360B MM 3-41...
  • Page 66 TO SELECT INSERT SWEEP SETUP INDIVIDUAL DISCRETE FILL FREQUENCIES C.W. MODE ON FINISHED, 0.0100 GHz PREVIOUS MENU RETURN TO SWP PRESS <ENTER> PRESS <ENTER> PRESS <ENTER> TO SELECT TO SELECT TO SELECT Figure 3-10. Using Discrete Fill Function 3-42 360B MM...

  • Page 67: Test Setup

    S M O O T H MENU GRAPH LOG MAGNITUDE (Channels 1 and 2) TYPE Test Setup Set up 360B VNA as described below. USER 2: (Channel 1) Parameter: Ta/Ra PARAMS Step 1. Connect cable between SOURCE LOCK Phase Lock: Ra...

  • Page 68: Test Procedure

    –0.07 umn of Table 3-6. The readout value should be less than 0.1 dB. Step 8. Repeat steps 1 thru 7 for 1, 20, 40, and 60 GHz — as applicable. 3-44 360B MM...
  • Page 69 Tb/Rb and Phase Lock to Rb. –0.04 Step 13. Repeat steps 7 thru 12 for the four fre- quencies in Table 3-7 . Use this table to re- –0.05 cord READOUT MARKER key values. –0.07 360B MM 3-45...

  • Page 70: Noise Floor/ Receiver Dynamic Range Test

    P O S M E M O R Y M E N U S M O O T H Test Setup Set up 360B VNA as described below. Step 1. Connect cable between SOURCE LOCK OUTPUT and R / SOURCE LOCK INPUT connectors;...

  • Page 71: Test Procedure

    Step 11. Press MARKER MENU key (bottom left) MARKERS/LIMITS and enable MARKER 1. Step 12. Press READOUT MARKER key (bottom MARKER READOUT LIMITS left), select MARKER TO MAX and re- MENU MARKER cord value in the “Dynamic Range” col- umn of Table 3-8. 360B MM 3-47...
  • Page 72 –77 derive the noise floor in absolute power units (dBm). Table 3-9. Noise Floor Measurement and Specification Specification Fre- Noise (dBm) quency Floor (GHz) (dBm) 3630A 3631A 0.01 –117 –117 –117 –117 –115 –115 –107 –107 –90 3-48 360B MM...

  • Page 73: Magnitude Tracking Test, Models 3630A/3631A

    S M O O T H M E N U RESOLUTION: 20 dB/DIV SCALE REF VALUE: 0 dB Test Setup Set up 360B VNA as described below. MARKER MARKER 1 ON POINT 4 MENU Step 1. Connect cable between SOURCE LOCK OUTPUT and R...

  • Page 74: Test Procedure

    Step 12. Press S PARAMS key and change user pa- rameter setting to Tb/Ra. Step 13. Repeat steps 1 thru 9 for applicable Tb/Ra frequency and Port 2 Source step attenu- ator settings in Table 3-10. 3-50 360B MM...

  • Page 75: Adjustments, Models 3630A/3631A

    The only adjustments that can be performed in the field are to the A5T MODELS 3630A/3631A LO1 PCB and the A4T LO2 PCB. A detailed procedure for adjusting these two PCBs is provided in paragraph 3-11 for the Models 361XA/362XA Test Sets. Refer to that procedure for adjustment instruc- tions. 360B MM 3-51/3-52...

  • Page 76: Performance Tests, Models 3635B/364Xb Modules

    These tests do not establish measurement traceability; such verifica- tion requires using an appropriate WILTRON verification kit. Success- ful completion of these procedures indicates that your 360B mm-wave system is operating properly and is capable of making accurate meas- urements.

  • Page 77: Initial System Setup

    Initial Sys- Perform the following steps before starting the per- tem Setup formance tests. Step 1. Verify that the 360B VNA system has been installed correctly, per the 360B Op- eration Manual (P/N 10410-00110), Chap- ter 2. Step 2. Install the precision-straight waveguide...

  • Page 78: Non-Ratioed Power Level Test Models 3635B/364X

    SMOOTH MENU GRAPH LOG MAGNITUDE (Both channels) TYPE Test Setup Setup 360B VNA as described below. Channel 1: a1/1 Step 1. Install a flush short on the output of the Channel 3: b1/1 PARAMS 3640B-X module connected to PORT 1.
  • Page 79 Step 7. Verify that the measurement trace falls be- low the limit line (Figure 3-11). Menu Choice CH 3 SINGLE CHANNEL CHANNEL MENU S-PARAMS USER DEFINED: Channel 3 for b2/1. 3-56 360B MM...
  • Page 80 PERFORMANCE TESTS AND NON-RATIOED POWER LEVEL TEST, ADJUSTMENTS MODELS 3635B/364X Figure 3-10. Non-Ratioed Power Level Test Dual Channel Waveform for a 3640B-X Module 360B MM 3-57...
  • Page 81 NON-RATIOED POWER LEVEL TEST, PERFORMANCE TESTS AND MODELS 3635B/364X ADJUSTMENTS Figure 3-11. Non-Ratioed Power Level Test Single Channel Waveform for a 3640B/3641B Module Set 3-58 360B MM...

  • Page 82: Test Setup

    3635B/364X High-level noise is the random noise that exists in the 360B VNA Sys- tem. Because it is non-systematic, it cannot be accurately predicted or measured. Thus, it cannot be removed using conventional error-correc- tion techniques.
  • Page 83 0.040 dB (W Band) are used); leave waveguide port on 3641B- LIMIT 2 X unterminated. –0.010 dB (Q Band) –0.010 dB (U Band) –0.030 dB (V Band) Step 14. Repeat steps 2 thru 9. –0.040 dB (W Band) 3-60 360B MM...
  • Page 84 PERFORMANCE TESTS AND HIGH LEVEL NOISE TEST, ADJUSTMENTS MODELS 3635B/364X Figure 3-12. High Level Noise Test, S Forward Transmission 360B MM 3-61...
  • Page 85 HIGH LEVEL NOISE TEST, PERFORMANCE TESTS AND MODELS 3635B/364X ADJUSTMENTS Figure 3-13. High Level Noise Test, S Forward Reflection 3-62 360B MM...

  • Page 86: Test Setup

    Press BEGIN CAL key (left). 1 PATH 2 PORT BEGIN FREQUENCY APPLY REPONSE NOTE REFLECTION In step 2, use 12-term calibration if ONLY NONE two 3640B-Xs are installed; other- wise, use 1 PATH 2 PORT (8-term) calibration. 360B MM 3-63...
  • Page 87 8-term SLIDING LOAD calibration over the full system operating range. (If neces- SETUP START: Low-end freq. STOP: High-end freq. MENU sary, refer to the 360B OM, Chapter 8, for detailed procedures.) CHANNEL DUAL CHANNELS 1-3 (two 3640B-Xs) MENU Step 3.
  • Page 88 PERFORMANCE TESTS AND SYSTEM DYNAMIC RANGE TEST, ADJUSTMENTS MODELS 3635B/364X Figure 3-14. System Dynamic Range Test Waveform 360B MM 3-65...

  • Page 89: Test Setup

    Step 1. Press BEGIN CAL key (left). FULL 12 TERM NOTE 1 PATH 2 PORT In step 2, use 12-term calibration if BEGIN FREQUENCY APPLY REPONSE two 3640B-Xs are installed; other- REFLECTION ONLY wises, use reflection-only calibration. NONE 3-66 360B MM...

  • Page 90: Test Procedure

    Using the menu prompts, perform a 12 Menu Choice term or reflection only SLIDING LOAD calibration over the full system operating SETUP START: Low-end freq. range. (If necessary, refer to the 360B OM, STOP: High-end freq. MENU Chapter 8, for detailed procedures.) CHANNEL SINGLE CHANNEL...
  • Page 91 MARKERS/LIMITS Peak to Peak Ripple value that you will use next in Table 3-13, below. MARKER READOUT LIMITS MENU MARKER Table 3-13. Source Match/Directivity Peak-to-Peak Ripple Peak-to-Peak Band Ripple 0.1548 dB 0.2187 dB 0.2753 dB 0.3467 dB 3-68 360B MM...
  • Page 92 PERFORMANCE TESTS AND SOURCE MATCH/ DIRECTIVITY TEST, ADJUSTMENTS MODELS 3635B/364X Figure 3-15. Source Match/Directivity Test Waveform 360B MM 3-69/3-70...
  • Page 93 Chapter 4 360B VNA System Troubleshooting Table of Contents INTRODUCTION ......4-3 TEST EQUIPMENT ..... . . 4-3 ERROR MESSAGES .
  • Page 94 Recommended test equipment for troubleshooting is listed in Chapter 1, Table 1-3. ERROR MESSAGES The 360B VNA System uses messages to flag malfunctions and isolate them to one or more modules. These messages consist of those that identify malfunctions isolated to the 360B VNA unit and those related to other units within the system.
  • Page 95 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-1. Error Codes Isolated to the 360B VNA Unit (1 of 3) Code Message Text Action FIFO RESET FAILURE Replace A12 PCB PROM CHECKSUM FAILURE #2 Replace A12 PCB BATTERY BACKED RAM FAILURE...
  • Page 96 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-1. Error Codes Isolated to the 360B VNA Unit (2 of 3) Code Message Text Action DISK DRIVE FAILURE See Table 4-9 NUMERIC PROCESSOR FAILURE #1 Replace A13 PCB DISK DRIVE NOT READY FOR TEST...
  • Page 97 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-1. Error Codes Isolated to the 360B VNA Unit (3 of 3) Code Message Text Action PROGRAM DATA ERROR ON #2 See Table 4-16 PROGRAM ERROR See Table 4-10 PROCESSOR COM ERROR See Table 4-10...
  • Page 98 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-2. Error Codes Relating to System Units Other Than 360B VNA (1 of 2) Code Message Text Action Error Codes Related to the 360B VNA or Test Set TEST SET NOT CONNECTED OR NOT...
  • Page 99 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-3. Error Codes Relating to System Units Other Than 360B VNA (2 of 2) Code Message Text Action Error Codes Related to the 360B VNA or Source SRC ID FAILURE See Table 4-17 LOCK FAILURE —-DEF...
  • Page 100 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-3. Troubleshoot Error Message 009 (1 of 1) ERROR MESSAGE 009 Step 1. Turn the VNA off, then on again. Do not touch any controls or keys during the self test. QUESTION: Is error message gone? YES: Problem is cleared.
  • Page 101 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-4. Troubleshoot Error Message 010 or 170 (1 of 1) ERROR MESSAGE 010 or 170 Step 1. Try a different printer. QUESTION: Is error message gone? YES: Problem is cleared. Go to next step.
  • Page 102 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-5. Troubleshoot Error Message 011 (1 of 1) ERROR MESSAGE 011 Step 1. Replace the A12 PCB in the VNA (paragraph 5-25). QUESTION: Is error message gone? YES: Problem is cleared. Go to next step.
  • Page 103 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-6. Troubleshoot Error Message 013, 014 or 020 (1 of 1) ERROR MESSAGE 013, 014, OR 020 Step 1. Replace the A13 PCB in the VNA (paragraph 5-25). QUESTION: Is error message gone? YES: Problem is cleared.
  • Page 104 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-7. Troubleshoot Error Message 015, 016, or 044 (1 of 1) ERROR MESSAGE 015, 016, OR 044 Step 1. Replace the A11 PCB in the VNA (paragraph 5-25). QUESTION: Is error message gone? YES: Problem is cleared.
  • Page 105 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-8. Troubleshoot Error Message 022 (1 of 1) ERROR MESSAGE 022 Step 1. Replace the A13 PCB in the VNA (paragraph 5-25). QUESTION: Is error message gone? YES: Problem is cleared. Go to next step.
  • Page 106 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-9. Troubleshoot Error Message 028 (1 of 1) ERROR MESSAGE 028 Step 1. Turn the VNA off. Remove and reinstall the diskette, then turn the power back on. QUESTION: Is error message gone? YES: Problem is cleared.
  • Page 107 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-10. Troubleshoot Error Message 031, 100, 103, 114, 115, 131, 132, or 134 (1 of 2) ERROR MESSAGE 031, 100, 103, 114, 115, 131, 132, OR 134 Step 1. Check that diskette is installed in drive.
  • Page 108 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-10. Troubleshoot Error Message 031, 100, 103, 114, 115, 131, 132, or 134 (2 of 2) QUESTION: Are voltages incorrect? YES: Troubleshoot +12V Regulator and +5V line on motherboard, and ask next question.
  • Page 109 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-11. Troubleshoot Error Message 060 (1 of 1) ERROR MESSAGE 060 Step 1. Check that cable between CONTROL connector on Test Set and VNA is properly connected. QUESTION: Is control cable connected correctly? YES: Try a different cable, and ask next question.
  • Page 110 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-12. Troubleshoot Error Message 061, 062, 063, or 064 (1 of 1) ERROR MESSAGE 061, 062, 063, OR 064 Step 1. Check that cable between SIGNAL connector on Test Set and VNA is properly connected.
  • Page 111 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-13. Troubleshoot Error Message 065, 066, 067, or 068 (1 of 1) ERROR MESSAGE 065, 066, 067, OR 068 Step 1. Check that cable between SIGNAL connector on Test Set and VNA is properly connected.
  • Page 112 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-14. Troubleshoot Error Message 069, 070, 071, or 072 (1 of 1) ERROR MESSAGE 069, 070, 071, OR 072 Step 1. Check that cable between SIGNAL connector on Test Set and VNA is properly connected.
  • Page 113 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-15. Troubleshoot Error Message 101 or 102 (1 of 1) ERROR MESSAGE 101 OR 102 Step 1. Check that diskette is installed in drive. QUESTION: Is diskette installed? YES: Go to next step.
  • Page 114 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-16. Troubleshoot Error Message 105 (1 of 2) ERROR MESSAGE 105 Step 1. Check that diskette is installed in drive. QUESTION: Is diskette installed? YES: Go to step 2. Go to step 6.
  • Page 115 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-16. Troubleshoot Error Message 105 (2 of 2) Step 5. Replace disk drive assembly. QUESTION: Is error message gone? YES: Problem is cleared. Try replacing A17 PCB then A12 PCB in VNA (paragraph 5-25), and ask next question.
  • Page 116 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-17. Troubleshoot Error Message 110 (1 of 2) ERROR MESSAGE 110 Step 1. Check that Signal Source is turned on. QUESTION: Is Signal Source On? YES: Go to next step. Turn on Signal Source.
  • Page 117 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-17. Troubleshoot Error Message 110 (2 of 2) Step 5. Replace A1 PCB in Signal Source (paragraph 10-25). QUESTION: Is error message gone? YES: Problem is cleared. Go to next step. Step 6.
  • Page 118 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-18. Troubleshoot Error Message 112 (1 of 1) ERROR MESSAGE 112 Step 1. For 361X and 362X Test Sets, check and reset as necessary the switch settings on the A6T PCB in the Test Set (below), and ask next question. For all other models, go to next step.
  • Page 119 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-19. Troubleshoot Error Message 171 (1 of 1) ERROR MESSAGE 171 Step 1. Check that GPIB cable is connected between the 360 SYSTEM BUS connector and the plotter. QUESTION: Is cable connected. YES: Go to next step.
  • Page 120 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-20. Troubleshoot Error Message 301 ABCDE (1 of 1) ERROR MESSAGE 301 ABCDE. Step 1. Check VNA serial number on rear panel. QUESTION: Is serial number 703015 or below? YES: Go to next step.
  • Page 121 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-21. Troubleshoot Error Message 301 -BCDE (1 of 1) ERROR MESSAGE 301 -BCDE Step 1. Check that interconnect cables are seated and connectors have no damaged pin. QUESTION: Are cables OK? YES: Go to next step.
  • Page 122 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-22. Troubleshoot Error Message 301 -B-DE (1 of 1) ERROR MESSAGE 301 -B-DE. Step 1. Check that interconnect cables are seated and connectors have no damaged pins. QUESTION: Are cables OK? YES: Go to next step.
  • Page 123 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-23. Troubleshoot Error Message 301 —CDE (1 of 1) ERROR MESSAGE 301 —CDE. Step 1. Check that interconnect cables are seated and connectors have no damaged pins. QUESTION: Are cables OK? YES: Go to next step.
  • Page 124 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-24. Troubleshoot Error Message 301 —-DE/DEF (1 of 6) ERROR MESSAGE 301 —-DE/DEF Step 1. Check for presence of signal in both forward and reverse directions. • If failure occurs in both directions, go to next step.
  • Page 125 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-24. Troubleshoot Error Message 301 —-DE/DEF (2 of 6) Go to next question. YES: Perform a confidence test on the Signal Source (paragraph 10-13), then ask next question. QUESTION: Is the output power correct? Troubleshoot the Signal Source (paragraph 10-3).
  • Page 126 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-24. Troubleshoot Error Message 301 —-DE/DEF (3 of 6) • A16T Power Divider PCB in Test Set (paragraph 6-19) • A6T PCB in Test Set QUESTION Does system only fail between 40 and 65 GHz? Go to next question.
  • Page 127 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-24. Troubleshoot Error Message 301 —-DE/DEF (4 of 6) Step 3. Determine frequency where failure occurs. QUESTION: Does failure only occur between 40 and 65 GHz? YES: Go to step 5. Go to next step.
  • Page 128 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-24. Troubleshoot Error Message 301 —-DE/DEF (5 of 6) QUESTION: Is error message gone? YES: Problem is cleared. Replace next item, or call customer service after last item. Step 6. Determine frequency where failure occurs.
  • Page 129 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-24. Troubleshoot Error Message 301 —-DE/DEF (6 of 6) Step 8. Replace the items below in the order listed. Ask next question after each replacement. • A6T PCB in Test Set (paragraph 6-9) •...
  • Page 130 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-25. Troubleshoot Error Message 303 (1 of 1) ERROR MESSAGE 303 Step 1. Perform a confidence test on the Signal Source (paragraph 10-13), then ask next question. QUESTION: Is the output power correct? Troubleshoot the Signal Source (paragraph 10-3).
  • Page 131 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-26. Troubleshoot Error Message 400 (1 of 1) ERROR MESSAGE 400 Step 1. Check that Signal Source is turned on. QUESTION: Is Signal Source On? YES: Go to next step. Turn On Signal Source.
  • Page 132 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-27. Monitor Problems (1 of 1) MONITOR PROBLEMS Step 1. Replace the items below in the order listed. Ask next question after each replacement. • A12 PCB in VNA (paragraph 5-25) • A11 PCB in VNA (paragraph 5-25) •...
  • Page 133 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-28. Bias Tee Problems (1 of 1) BIAS TEE PROBLEMS Step 1. Check that the front panel fuses in the Test Set are not blown. QUESTION: Are fuses blown? YES: Replace fuses, and ask next question.
  • Page 134 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-29. Step Attenuator Problems (1 of 1) STEP ATTENUATOR PROBLEMS Step 1. Replace the items below in the order listed. After each replacement, ask next question. • A7T PCB in Test Set (paragraph 6-10) •...
  • Page 135 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-30. Error Message 301 —-DE for System With Model 3635B Test Set When Port 2 Module is a 3641 (1 of 1) ERROR MESSAGE 301 —-DE Step 1. Replace the items below in the order listed. After each replacement, ask next question.
  • Page 136 360B VNA SYSTEM TROUBLESHOOTING TROUBLESHOOTING TABLES Table 4-31. Error Message 301 —-DE for System With Model 3635B Test Set When Port 2 Module is a 3640 (1 of 2) ERROR MESSAGE 301 —-DE Step 1. Check for presence of signal in both forward and reverse directions.
  • Page 137 TROUBLESHOOTING 360B VNA SYSTEM TABLES TROUBLESHOOTING Table 4-31. Error Message 301 —-DE for System With Model 3635B Test Set When Port 2 Module is a 3640 (2 of 2) Step 4. Replace the items below in the order listed. After each replacement, ask next question.
  • Page 138 Chapter 5 360B VNA Information Table of Contents INTRODUCTION ......5-3 REPLACEABLE SUBASSEMBLIES ....5-3 VNA DESCRIPTION .
  • Page 139 5-12 A9 SYNC DET “R” PCB CIRCUIT DESCRIPTION ..5-26 5-13 A10 PS/IF PCB CIRCUIT DESCRIPTION ... 5-28 5-14 A11 I/O PROCESSOR PCB CIRCUIT DESCRIPTION ..5-30 5-15 A12 MAIN 2 PROCESSOR PCB CIRCUIT DESCRIPTION .

  • Page 140: Introduction

    SUBASSEMBLIES modules. If a malfunction occurs in one of these modules, it can be ex- changed. Upon request and typically within 24 hours, WILTRON or an Anritsu/Wiltron Service Center will ship an exchange module. The cus- tomer has 30 days in which to return the defective item. All exchange parts are warranted for 90 days from the date of shipment or for the balance of the original-part warranty—whichever is longer.

  • Page 141: Vna Description

    DESCRIPTION INFORMATION VNA DESCRIPTION The 360B VNA unit provides the control and display function for the system. Its front panel controls provide menu selections for test func- tions, test parameters, measurement enhancements, and frequencies. It sends frequency information to the signal source over a dedicated system (GPIB) bus.

  • Page 142: I/O Processor

    360B VNA INFORMATION DESCRIPTION The magnitude vector coming from the detectors is represented by the vector sum of the real and imaginary components. The phase is repre- sented by the arctangent of the imaginary divided by the real compo- nents. To reconstruct the S-parameter, the digital processing section computes the appropriate signal ratios.
  • Page 143 A5 10 MHz Reference PCB Assy. A8 Sync. Detector B PCB Assy. A7 Sync. Detector A PCB Assy. A4 A/D Converter PCB Assy. A3 Cal/3rd L.O. A1 L.O. 1 Phase Lock PCB Assy. PCB Assy. Figure 5-1 360B VNA Assembly Locations 360B MM...
  • Page 144 SUPPLY OSCILLATOR GRAPHICS M. B. CONTROL PROCESSOR 10 MHz NEC 7220 P. S. TEST SET TEST SET BLANKING/ CONVERTER INTERFACE SYNC. COMPOSITE VIDEO OUT PHASE LOCK P.S. EXTERNAL RGB OUT CONTROL Figure 5-2. 360B VNA System Block Diagram 360B MM...
  • Page 145 A1 LO 1 PHASE LOCK 360B VNA PCB CIRCUIT DESCRIPTION INFORMATION A1 LO 1 PHASE LOCK The A1 Phase Lock PCB (Figure 5-3) is the phase-lock circuit for the PCB CIRCUIT first local oscillator (LO1), which is located on the A5T board in the test DESCRIPTION set.

  • Page 146: A1 Lo 1 Phase Lock Pcb Circuit Description

    360B VNA A1 LO 1 PHASE LOCK INFORMATION PCB CIRCUIT DESCRIPTION φ DETECT 1 IN 10 MHz REFERENCE IN FREQUENCY/PHASE LEVEL LOCK DETECTOR DETECTOR TO I/O PROCESSOR 50 Hz. NOTCH TO VTO #1 FILTER FREQUENCY CONTROL LEVEL DETECTOR LOOP FILTER...
  • Page 147 A2 LO 2 PHASE LOCK 360B VNA PCB CIRCUIT DESCRIPTION INFORMATION The A1 PCB and the A2 PCB are operationally similar. The only func- A2 LO 2 PHASE LOCK PCB CIRCUIT tional difference is the ability to disable the phase lock circuit when us- DESCRIPTION ing a synthesizer.

  • Page 148: A2 Lo 2 Phase Lock Pcb Circuit Description

    360B VNA A2 LO 2 PHASE LOCK INFORMATION PCB CIRCUIT DESCRIPTION PHASE DETECTOR GAIN CONSTANT INPUT 2 IN 10 MHz REFERENCE IN LEVEL LOCK DETECTOR TO I/O PROCESSOR 50 kHz. NOTCH FILTER LEVEL TO VTO 2 DETECTOR FREQUENCY CONTROL LOOP FILTER...

  • Page 149: A3 Cal/3Rd Lo Pcb Circuit Description

    A3 CAL/3rd LO PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION A3 CAL/3rd LO PCB The A3 CAL/3rd LO PCB (Figure 5-5) has two modes of operation. One CIRCUIT DESCRIPTION is the CAL mode, the other is the LO3 mode. LO3 Mode In this mode the circuit is a phase-locked 2.333 MHz...
  • Page 150 360B VNA A3 CAL/3rd LO PCB INFORMATION CIRCUIT DESCRIPTION TO I/O PROCESSOR LOCK 10 MHz DETECTOR 2.333 MHz OK REFERENCE INPUT 9.333 MHz 2.3333 MHz ERROR AMPLIFIER φ BYTE FROM 3 MHz I/O PROCESSOR LOWPASS FILTER LO/CAL IF SYNC FROM A10 PCB...

  • Page 151: A4 A/D Converter Pcb Circuit Description

    A4 A/D CONVERTER PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION A4 A/D CONVERTER PCB The A4 A/D Converter PCB (Figure 5-6) has two modes of operation, CIRCUIT DESCRIPTION calibration and normal. (A calibrate cycle is completed approximately every three minutes to guarantee absolute accuracy.) The A4 PCB per- forms a 19-bit analog to digital conversion.
  • Page 152 360B VNA A4 A/D CONVERTER PCB INFORMATION CIRCUIT DESCRIPTION 12 BIT N2 OUTPUT 16:1 TO I/O PROCESSOR ANALOG 12 BIT A/D EXT. A/D X 64 SUMMING CONVERTER +3.3V REF 12 BIT 0V REF 12 BIT 12 BIT D/A FLIP COMPARATOR...

  • Page 153: A/D Control Signals

    A4 A/D CONVERTER PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION A/D Control The start conversion signal (SC) controls when the Signals conversion begins. The conversion complete signal (CC) indicates the conversion is completed. Depend- ing on the functional mode of operation, the steering circuit routes the SC signal to the appropriate A/D converter and selects the appropriate CC signal.
  • Page 154 Temperature and aging affect the performance of the 12 bit A/D converter. This can result in gain and offset errors. To compensate for these errors, the 360B measures two reference voltages as part of the calibration cycle. These two voltages provide information that allows for software correction of the gain and offset errors.

  • Page 155: A5 10 Mhz Reference Pcb Circuit Description

    The EXT 10 MHz REF connector on the rear panel. This input is for using an external reference source. The internal 10 MHz crystal oscillator in the 360B VNA. The presence detector monitors the EXT 10 MHz input. When the pres- ence detector detects an external input signal, it sets a bit that informs the I/O processor of the external signal.
  • Page 156 360B VNA A5 10 MHz REFERENCE PCB INFORMATION CIRCUIT DESCRIPTION TO I/O PROCESSOR FROM REAR PANEL 12 MHz LEVEL EXT. PRESENCE INT/EXT TO DETECTOR LOWPASS 10 MHz DETECTOR I/O PROCESSOR FILTER EXT 10 MHz OUT TO REAR PANEL 10 MHz OUT TO...

  • Page 157: A6 Source Lock Pcb Circuit Description

    A6 SOURCE LOCK PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION A6 SOURCE LOCK PCB The A6 Source Lock PCB (Figure 5-8) provides source lock control. Its CIRCUIT DESCRIPTION purpose is to phase-lock the source to the desired frequency and phase. A 10 MHz reference signal is divided to 1 MHz by a divide-by-10 cir- cuit.
  • Page 158 360B VNA A5 10 MHz REFERENCE PCB INFORMATION CIRCUIT DESCRIPTION LOCK TO I/O PROCESSOR DETECT 10 MHz 1 MHz 1 MHz φ 9 MHz φ DETECT 2 1/4 MHz 0 2 1/4 MHz 90 SOURCE LOCK LOCK INPUT TO I/O...
  • Page 159 A7 SYNC DET “A” PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-10 A7 SYNC DET “A” PCB The A7 Sync Det “A” PCB is a synchronous detector circuit. The I/O CIRCUIT DESCRIPTION processor sends a phase byte to the divide-by-120 circuit (÷120). This byte addresses two look up tables.

  • Page 160: A7 Sync Det "A" Pcb Circuit Description

    360B VNA A7 SYNC DET “A” PCB INFORMATION CIRCUIT DESCRIPTION 10 MHz REFERENCE φ BYTE F ROM I/O PROCESSOR SIGNAL INPUT 100 kHz ÷ 1 2 0 LOWPASS FILTERS S I N 8 BIT L OO K U P I F SYNC...
  • Page 161 A8 SYNC DET “B” PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-11 A8 SYNC DET “B” PCB The A8 Sync Det “B” PCB (Figure 5-10) is a synchronous detector cir- CIRCUIT DESCRIPTION cuit. The I/O processor sends a phase byte to the divide-by-120 counter (÷120).

  • Page 162: A8 Sync Det "B" Pcb Circuit Description

    360B VNA A8 SYNC DET “B” PCB INFORMATION CIRCUIT DESCRIPTION 10 MHz REFERENCE φ BYTE F ROM I/O PROCESSOR SIGNAL INPUT 100 kHz ÷ 1 2 0 LOWPASS FILTERS S I N 8 BIT L OO K U P I F SYNC...
  • Page 163 A9 SYNC DET “R” PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-12 A9 SYNC DET “R” PCB The A9 Sync Det “R” PCB (Figure 5-11) is a synchronous detector cir- CIRCUIT DESCRIPTION cuit. The I/O processor sends a phase byte to the divide-by-120 counter (÷120).

  • Page 164: A9 Sync Det "R" Pcb Circuit Description

    360B VNA A9 SYNC DET “R” PCB INFORMATION CIRCUIT DESCRIPTION 10 MHz REFERENCE φ BYTE F ROM I/O PROCESSOR SIGNAL INPUT 100 kHz ÷ 1 2 0 LOWPASS FILTERS S I N 8 BIT L OO K U P I F SYNC...

  • Page 165: A10 Ps/If Pcb Circuit Description

    A10 PS/IF PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-13 A10 PS/IF PCB The A10 PS/IF PCB (Figure 5-12) is the external digital control board. CIRCUIT DESCRIPTION This board has many functions including: Power supply synchronization IF synchronization Pulse catching of external digital control pulses Serial number identification ±10V external voltage generation...
  • Page 166 360B VNA A10 PS/IF PCB INFORMATION CIRCUIT DESCRIPTION 10MHz POWER SUPPLY INJECTION LOCK TO A14 222 kHz 83 1/3 kHz IF SYNC TO A3, A7, A8, A9 PRESENCE TO I/O PROCESSOR DETECTOR PRESENCE TO I/O PROCESSOR DETECTOR EXT DIG CONTROL...

  • Page 167: A11 I/O Processor Pcb Circuit Description

    A11 I/O PROCESSOR PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-14 A11 I/O PROCESSOR The A11 I/O Processor PCB (Figure 5-13) controls the operation of the PCB CIRCUIT signal source and plotter through a dedicated GPIB interface bus. It DESCRIPTION controls the test set through a dedicated digital bus. This processor also controls all analog circuits and processes and corrects the data from the A/D converter.
  • Page 168 360B VNA A11 I/O PROCESSOR PCB INFORMATION CIRCUIT DESCRIPTION GPIB CONTROLLER 192K GRAPHICS 128K GPIB 8088 MEMORY BUFFER TEST SET CONTROL TIMER EPROM CTRL GRAPHICS DISPLAY CONTROLLER READ WRITE BUFFER BUFFER BUFFER FIFO FIFO PIXEL DATA A12 DATA TO ANALOG SECTION...

  • Page 169: A12 Main 2 Processor Pcb Circuit Description

    A12 MAIN 2 PROCESSOR PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-15 A12 MAIN 2 The A12 Main 2 Processor PCB (Figure 5-14) is the human interface PROCESSOR PCB processor. It is one of three microprocessor based circuits. The human CIRCUIT DESCRIPTION interface processor controls the interaction with the front panel, the ex- ternal GPIB bus, and the parallel printer.
  • Page 170 360B VNA A12 MAIN 2 PROCESSOR PCB INFORMATION CIRCUIT DESCRIPTION EPROM SLAVE GPIB 1024K GPIB VOLATILE RAM CONTROLLER 8087 8088 A12 DATA 32K BATTERY BUFFER BACKED RAM TO FRONT PANEL TIMER CTRL PARALLEL PRINTER PORT BUFFER READ WRITE BUFFER FIFO...

  • Page 171: A13 Main 1 Processor Pcb Circuit Description

    A13 MAIN 1 PROCESSOR PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-16 A13 MAIN 1 The A13 Main 1 Processor PCB (Figure 5-15) is the vector processor. It PROCESSOR PCB is also called the Main #1 processor. The vector processor processes CIRCUIT DESCRIPTION data received from the I/O processor via the FIFO registers.
  • Page 172 360B VNA A13 MAIN 1 PROCESSOR PCB INFORMATION CIRCUIT DESCRIPTION EPROM 8088 8087 512K DYNAMIC RAM ADDRESS AND DATA BUSES DISK CONTROLLER DIGITAL SIGNAL TIMER PROCESSOR CTRL TO DISK DRIVE BUFFER S RAM A13 DATA TO A11 PCB AND A12PCB Figure 5-15.
  • Page 173 A14 POWER SUPPLY CONTROL PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-17 A14 POWER SUPPLY The A14 Power Supply Control PCB (Figure 5-16) controls the power CONTROL PCB supply. It has the following functions: CIRCUIT DESCRIPTION Controlling the regulation of the switching power supply...

  • Page 174: A14 Power Supply Control Pcb Circuit Description

    360B VNA A14 POWER SUPPLY CONTROL PCB INFORMATION CIRCUIT DESCRIPTION OUT OF OUT OF REG TO I/O PROCESSOR MONITOR STARTUP RECT HI LINE TO 18 VAC FROM LINE HI, LO LINE I/O PROCESSOR DERIVED INPUT A18 DETECTOR LO LINE +18 VDC...

  • Page 175: A15 Power Supply Converter Pcb Circuit Description

    A15 POWER SUPPLY CONVERTER PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-18 A15 POWER SUPPLY The A15 Power Supply Converter PCB (Figure 5-17) is a dc-to-dc con- verter that converts ±165V from the A18 PCB to a variety of filtered dc...
  • Page 176 360B VNA A15 POWER SUPPLY CONVERTER PCB INFORMATION CIRCUIT DESCRIPTION +165 -165 5V RTN 8V RTN +15V THERMISTOR MOUNTED ON HEAT SINK +15V RTN 18 RTN 27 RTN Figure 5-17. A15 Power Supply Converter PCB Block Diagram 360B MM 5-39...

  • Page 177: A16 Test Set I/O Pcb Circuit Description

    A16 TEST SET I/O PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-19 A16 TEST SET I/O PCB The A16 Test Set I/O PCB (Figure 5-18) provides fused dc voltages to CIRCUIT DESCRIPTION the test set. The A18 PCB supplies the raw dc voltages to the A16 PCB.
  • Page 178 360B VNA A16 TEST SET I/O PCB INFORMATION CIRCUIT DESCRIPTION ADDRESS AND DATA STROBE TO I/O PROCESSOR (A11 PCB) +8 POWER DATA T/R OE TO I/O PROCESSOR TEST SET (A11 PCB) REAR PANEL ADDRESS ELEC. FUSE POWER DETECT DETECTOR STROBE CONTROL ELEC.

  • Page 179: A18 Power Supply Motherboard Pcb Circuit Description

    A18 POWER SUPPLY MOTHERBOARD PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-21 A18 POWER SUPPLY The A18 Power Supply Motherboard PCB (Figure 5-19) the following MOTHERBOARD PCB functions: CIRCUIT DESCRIPTION Provides power supply bus and connectors for the power supply PCBs.
  • Page 180 360B VNA A18 POWER SUPPLY MOTHERBOARD PCB INFORMATION CIRCUIT DESCRIPTION LINE FUSE (FRONT PANEL) (REAR PANEL) POWER REAR 110/220 VAC SWITCH PANEL +165V RECTIFIER 110/220 TO SWITCHING SELECTOR FETS A15 PCB FILTER FILTER HOLDING CAPACITOR -165V START UP TRANSFORMER 18 VAC...

  • Page 181: A19 Front Panel, Main, Pcb Circuit Description

    A19 FRONT PANEL, MAIN, PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-22 A19 FRONT PANEL, The A19 Front Panel, Main, PCB (Figure 5-20) is the main front panel MAIN, PCB CIRCUIT circuit board. It contains the switch matrix of all front panel switches.
  • Page 182 360B VNA A19 FRONT PANEL, MAIN, PCB INFORMATION CIRCUIT DESCRIPTION UP SWITCH DOWN SWITCH FRONT PANEL ROW 6 SWITCH MATRIX ROW 5 ROW 4 ROW 3 ROW 2 ROW 1 ROW 0 COL 0 COL 1 COL 2 COL 3...

  • Page 183: A20 Front Panel Control Pcb Circuit Description

    A20 FRONT PANEL CONTROL PCB 360B VNA CIRCUIT DESCRIPTION INFORMATION 5-23 A20 FRONT PANEL A20 Front Panel Control PCB (Figure 5-21) is the digital front-panel CONTROL PCB control board. It contains all of the decode logic and key-scan circuitry CIRCUIT DESCRIPTION for the front panel switches and the digital rotary knob.
  • Page 184 360B VNA A20 FRONT PANEL CONTROL PCB INFORMATION CIRCUIT DESCRIPTION SPIN KNOB TO MAIN 2 PROCESSOR DATA DECODER LED(1) TO UP DATA LED(2) DOWN CNT LED(3) COL 7 COL 6 COL 5 TO A19 COL 4 FRONT 1 OF 20...

  • Page 185: Remove And Replace Covers

    360B VNA REMOVE AND REPLACE INFORMATION COVERS 5-24 REMOVE AND This paragraph provides instructions for removing top, bottom, and REPLACE COVERS side covers. To replace covers, reverse the removal process. Procedure Top and Bottom Covers Step 1. On rear panel, loosen screws and remove the feet from the four corners.

  • Page 186: Remove And Replace Printed Circuit Boards

    REMOVE AND REPLACE 360B VNA PRINTED CIRCUIT BOARDS INFORMATION 5-25 REMOVE AND This paragraph provides instructions for removing and replacing REPLACE PRINTED printed circuit boards (PCBs). To replace PCBs, reverse the removal CIRCUIT BOARDS process. Refer to Figure 5-1, on page 5-6, for PCB locations.

  • Page 187: Remove And Replace Front Panel And Disk Drive Assembly

    360B VNA REMOVE AND REPLACE INFORMATION FRONT PANEL AND DISK DRIVE ASSEMBLY 5-26 REMOVE AND This paragraph provides instructions for removing and replacing the REPLACE FRONT front panel and disk drive assembly. To replace the assembly, reverse PANEL AND DISK the removal process.

  • Page 188: Remove And Replace Color Display Vga Assembly

    REMOVE AND REPLACE 360B VNA COLOR DISPLAY VGA ASSEMBLY INFORMATION 5-27 REMOVE AND This paragraph provides instructions for removing and replacing the REPLACE COLOR color display VGA assembly. To replace the assembly, reverse the re- DISPLAY VGA moval process. ASSEMBLY...
  • Page 189 Chapter 6 36XXA Test Sets, General Information Table of Contents INTRODUCTION ......6-5 REPLACEABLE SUBASSEMBLIES ....6-5 OVERALL CIRCUIT DESCRIPTION .
  • Page 190 6-10 REMOVE AND REPLACE A7T OR A27T PCB ..6-14 Preliminary ......6-14 Procedure .
  • Page 191 6-19 REMOVE AND REPLACE A16T POWER DIVIDER ..6-23 Preliminary ......6-23 Procedure .

  • Page 192: Introduction

    SUBASSEMBLIES source modules. If a malfunction occurs in one of these modules, it can be exchanged. Upon request and typically within 24 hours, WILTRON or an Anritsu/Wiltron Service Center will ship an exchange module. The customer has 30 days in which to return the defective item. All ex- change parts are warranted for 90 days from the date of shipment or for the balance of the original-part warranty—whichever is longer.

  • Page 193: Overall Circuit Description

    General The test set contains the measurement components for the 360B VNA system. The test set, under direct control of the VNA, performs the following: Stimulus signal routing from the signal source to a device-under-test (DUT) through one of the test ports (Port 1 or Port 2).
  • Page 194 IF signals is first detected; then it is converted to digital data. The VNA processors — controlled by firmware cou- pled with downloadable software — manipulate this digital data according to theoretical modelling tech- niques. Short-term system errors are normalized 360B MM...
  • Page 195 The resultant S-parameter data that characterizes the DUT is then presented on the VNA color display, output to a printer or plotter, or routed to the rear panel (external) GPIB inter- face. 360B MM...

  • Page 196: Test Set Signal Descriptions

    A10T Buffer Amplifiers. Before processing by the A1T, A2T, and A3T IF Amplifiers, the desired relationship of Channels A, B, and R is estab- lished by the selection switches in the A24T Source Lock/Reference Se- lect assembly, as is the choice of source lock signal. 360B MM...
  • Page 197 CH4, selected by the push buttons at the right of the VNA display.) Table 6-1. S-parameter Definitions Multi-Port Device VNA Measurement Measurement S Parameter Definition Ratio Channel Ratio Definition Forward Reflection Reverse Transmission Forward Transmission Reverse Reflection 6-10 360B MM...

  • Page 198: Remove And Replace Procedures

    Step 2. Slide the top and bottom covers toward the rear and remove. Side Covers Step 1. Remove top and bottom covers. Step 2. Grasp rack-slide handle at front, and slide side panels to the rear and remove. 360B MM 6-11...

  • Page 199: Remove And Replace A1T Thru A5T Pcbs

    Tug on cover plate handle to lift PCB nents. Refer to Figure 1-2, straight up and out. page 1-10, for precautionary instructions. Failure to follow NOTE these instructions may result After replacing cables, torque con- in damage to the PCB. nectors to 8 inch-pounds. 6-12 360B MM...

  • Page 200: Remove And Replace A5T Pcb (3635B)

    — through holes in the nents. Refer to Figure 1-2, A23T Motherboard. page 1-10, for precautionary instructions. Failure to follow • After replacing cables, torque these instructions may result connectors to 8 inch-pounds. in damage to the PCB. 360B MM 6-13...

  • Page 201: Remove And Replace A6T Pcb

    Remove the top cover (paragraph 6-6). Procedure Step 1. Loosen thumbscrew, located in the middle- top of the PCB, by turning it counterclock- wise. Step 2. Lift up on the the two edge tabs and pull PCB straight up and out. 6-14 360B MM...

  • Page 202: Remove And Replace Compensation Cable Assemblies

    Step 2. Remove two screws, lockwashers, and flat washers and standoffs on either side of ca- ble assemblies. Step 3. Lift the two semi-rigid cables up and out. NOTE After replacing cables, torque con- nectors to 8 inch-pounds. 360B MM 6-15...

  • Page 203: Remove And Replace A20T Thru A22T

    Step 7. If applicable, remove bias tee by loosening connector, then removing screw, lock- washer, and flatwasher. Step 8. Remove remaining screw(s) and separate attenuator from bracket. NOTE After replacing cables, torque con- nectors to 8 inch-pounds. 6-16 360B MM...

  • Page 204: Remove And Replace A30T And A31T Triplers

    Step 3. Remove two screws, lockwashers, and flat washers from bottom of bracket. Step 4. Lift tripler assembly and bracket straight up and out. NOTE After replacing cables, torque con- nectors to 8 inch-pounds. 360B MM 6-17...

  • Page 205: Remove And Replace A13T (A9T) Transfer Switch

    3622A). Step 2. Remove applicable twisted-wiring harness connector(s) from motherboard connec- tor(s). Step 3. Remove two screws and lockwashers from bracket, and remove transfer switch as- sembly. NOTE After replacing cables, torque con- nectors to 8 inch-pounds. 6-18 360B MM...

  • Page 206: Remove And Replace A25T Rf Splitter

    Step 3. Remove eight screws from Sampler A/ Sampler B cover plate and lift plate up and out. Step 4. Loosen connector and remove RF splitter. NOTE After replacing cables, torque con- nectors to 8 inch-pounds. 360B MM 6-19...

  • Page 207: Remove And Replace A8T And/Or A10T Buffer Amplifiers

    Remove three screws from the top of the A8T or A10T assembly. Step 4. Slide the assembly out from under the support brackets, being careful not to dam- age the power supply feedthroughs. NOTE After replacing cables, torque con- nectors to 8 inch-pounds. 6-20 360B MM...

  • Page 208: Remove And Replace A12T Power Amplifier

    Step 3. Remove two hex-head screws, lockwash- ers, and flat washers from bracket. Step 4. Slide power amplifer to rear and lift up and out. NOTE After replacing cables, torque con- nectors to 8 inch-pounds. 360B MM 6-21...

  • Page 209: Remove And Replace A13T And A17T Interface Assemblies

    Step 3. Remove the two flexible coaxial cables at the rear of the A13T or A17T assembly. Step 4. Remove four screws and pull assemblies away from panel. NOTE After replacing cables, torque con- nectors to 8 inch-pounds. 6-22 360B MM...

  • Page 210: Remove And Replace A16T Power Divider

    Remove the top cover (paragraph 6-6). Procedure Step 1. Remove four coaxial cables from assembly top. Step 2. Remove the four screws and lockwasher and lift power divider up and out. NOTE After replacing cables, torque con- nectors to 8 inch-pounds. 360B MM 6-23...

  • Page 211: Remove And Replace A24T Source Lock Assembly

    Step 3. Remove cable assemblies W18, W20, W22, and W40, to obtain unobstructed access. Step 4. Remove six screws and lockwashers and lift assembly up and out. NOTE After replacing cables, torque con- nectors to 8 inch-pounds. 6-24 360B MM...

  • Page 212: Remove And Replace A14T/A15T Coupler Connectors

    Step 7. Slide the couplers back and lift up and away. Models 3611, 3621, 3612, and 3622 Step 1. Remove the two cables that attach to each coupler. 360B MM 6-25...

  • Page 213: Remove And Replace A20T Rf Input Amplifier (Model 3635B)

    Remove the connector from A5J3, and free the black/white twisted-wire pair for re- moval. Step 3. Tag wires red and black wires and desolder from pins. Step 4. From side, remove four screws from bracket and remove amplifier. 6-26 360B MM...
  • Page 214 36XXA TEST SETS REMOVE AND REPLACE GENERAL INFORMATION A20T RF INPUT AMPLIFIER A22T A21T A20T CONNECT TO A5J3 A11T Figure 6-1. RF Component Locations, Model 3635B 360B MM 6-27...

  • Page 215: Remove And Replace A22T Port 2 Lo Amplifier (Model 3635B)

    3635B) NOTE Refer to Figure 6-1 for component locations. Preliminary Remove top cover (paragraph 6-6). Procedure Step 1. Remove two RF cables. Step 2. Tag and desolder five wires. Step 3. Remove four screws and remove amplifier. 6-28 360B MM...

  • Page 216: Remove And Replace A21T Port 1 Lo Amplifier (Model 3635B)

    3635B) NOTE Refer to Figure 6-1 for component locations. Preliminary Remove top cover (paragraph 6-6). Procedure Step 1. Remove two RF cables. Step 2. Tag and desolder six wires. Step 3. Remove four screws and remove amplifier. 360B MM 6-29...

  • Page 217: Remove And Replace A11T Lo 1 Power Splitter (Model 3635B)

    (MODEL 3635B) NOTE Refer to Figure 6-1 for component locations. Preliminary Remove top cover (paragraph 6-6). Procedure Step 1. Remove two RF cables. Step 2. Remove connector from backside of LO1 INPUT connector. Step 3. Remove splitter. 6-30 360B MM...
  • Page 218 Chapter 7 361XA/362XA Test Sets Information Table of Contents INTRODUCTION ......7-3 OVERALL FUNCTIONAL DESCRIPTION ... 7-3 TEST PORT CONVERTERS .
  • Page 219 7-12 A24T SOURCE LOCK/REFERENCE SELECT ASSEMBLY CIRCUIT DESCRIPTION ....7-27 7-13 A27T AMPLIFIER/ SWITCH DRIVER PCB CIRCUIT DESCRIPTION ....7-28 7-14 RF DECK ASSEMBLY DESCRIPTIONS .

  • Page 220: Introduction

    0.04 – 40 V Male Connector 3612A Reversing 0.04 – 60 3613A Reversing 0.04 – 65 3615A Reversing 0.04 – 50 3622A Active Device 0.04 – 60 3623A Active Device 0.04 – 65 3625A Active Device 0.04 – 50 360B MM...
  • Page 221 DRIVER PCB A20T BIAS INPUT PORT 2 SOURCE ATTENUATOR BIAS FUSE A20T RF IN PORT 2 TEST ATTENUATOR A19T BIAS TEE DESIGNATED ITEMS ARE PART OF MODEL 3620A ONLY. Figure 7-1. Location Diagram for 3610A/3611A and 3620A/3621A Major Assemblies 360B MM...
  • Page 222 RF IN A19T * Designated items are part of Models 3622A/23A/25A DESIGNATED ITEMS ARE PART OF MODELS 3612A/22A ONLY. BIAS TEE ** Designated items are part of Models 3612A/13A/15A Figure 7-2. Location Diagram for 3612A/13A/15A and 3622A/23A/25A Major Assemblies 360B MM...

  • Page 223: Test Port Converters

    3612A, 3613A, 3615A, 3622A, 3623A and 3625A Test Sets. Table 7-2. Test Port Converters for 3610A/3611A and 3620A/3621A NOTE Use wrench (WILTRON part number 01-202) for changing WILTRON the test port converters listed in Tables 7-2 and 7-3. Description Part Number...

  • Page 224: Functional Description, 3610A/11A And 3620A/21A Test Sets

    VNA, via the A7T Attenu- ator Driver PCB. The A18T and A19T bias tees apply an appropriate dc bias voltage to those active DUTs that require it. Bias voltage can be applied to the test set via front or rear panel connectors. 360B MM...

  • Page 225: First And Second If Down Conversion

    LO frequen- cies and the input signal (T , or R ). This heterodyning action provides the desired intermedi- ate frequency (IF) of 89 ±4 MHz. The resultant first IF signals are input to buffer amplifiers A8T and A10T. 360B MM...

  • Page 226: Source Lock/Reference Signal Selection

    . The second IF signal source for the A3T Channel IF Amplifier is either T or R . The second IF signal source for the VNA source lock circuitry is R for forward measurements and R for reverse measurements. 360B MM...

  • Page 227: Amplification

    VNA via the A16T Three-Way Power Divider. This ⁄ kHz calibration signal goes directly to the gain- ranging amplifiers. These amplifier are then auto- matically calibrated to assure optimum accuracy and predictability of the Channel IF Amplifier outputs. 7-10 360B MM...
  • Page 228 PORT 2 LOCK COUPLER CIRCUITS A20T, A21T, and A22T PORT 2 RF IN TO/FROM FROM ATTENUATOR SIGNAL 360 VNA DIGITAL DRIVER TEST SET SOURCE INTERFACE INTERFACE 3620A/21A ONLY Figure 7-3. Models 3610A, 11A, 20A, 21A Block Diagram 360B MM 7-11...
  • Page 229 AMP/SWITCH DRIVER DRIVER TEST SET 3622A/23A/25A 3622A/3623A INTERFACE * 40–60 GHz for INTERFACE Only Models 3612A/22A *40-60 GHz 40–50 GHz for for Models Models 3615A/25A 3612A/3622A Figure 7-4. Models 3612A, 13A, 15A, 22A, 23A, 25A Block Diagram 7-12 360B MM...

  • Page 230: Functional Description, 3612A/13A/15A And 3622A/23A/25A Test Sets

    ∗ The A30T/A31T Tripler Assemblies used in the 3612A/3622A and 3613A/3623A/3615A/3625A test sets are functionally alike, but differ in upper fre- quency range (60 GHz to 50 or 65 GHz). Refer to the description for the A30T/A31T Tripler Assemblies on page 7-38. 360B MM 7-13...
  • Page 231 B (T First and second IF down conversion, source lock/ref- erence signal selection, and third IF down conver- sion and amplification is functionally identical for all of the Models 361XA and 362XA Test Sets. 7-14 360B MM...

  • Page 232: A1T, A2T, And A3T Channel If Amplifier Pcb Circuit Description

    These signals are sent via the A6T Digital Control PCB to the VNA. Responding to these signals, the VNA sends data through A6T to con- trol the gain ranging amplifiers maintaining the peak signal level be- tween 0 and –24 dB. 360B MM 7-15...
  • Page 233 The outputs are then measured and compared to ex- pected values. The VNA then trims each of the amplifiers using a software algorithm to achieve optimum accuracy and predictability. 7-16 360B MM...
  • Page 234 TO 360 VNA SYNC DETECTOR PEAK DETECTOR WINDOW COMPARATOR > 0 dB > -12 dB > -24 dB TO I/O PROCESSOR VIA A6T, A16 (VNA) Figure 7-5. A1T, A2T, and A3T Channel IF Amplifier PCB Block Diagram 360B MM 7-17...
  • Page 235 The buffer amplifier outputs are the second local oscillator fre- quencies and have a frequency range from 12.25 MHz (divide by 8) to 272.25 MHz (divide by 1). 7-18 360B MM...

  • Page 236: A4T Lo 2 Pcb Circuit Description

    LOOP GAIN LO 1 PROCESSOR OUTPUT LO 2 VIA A6T, A16 (VNA) CONTROL V 0 DETECTOR LO 3 T0 A2 (VNA) WINDOW TO I/O PROCESSOR COMPARATOR VIA A6T, A16 (VNA) Figure 7-6. A4T LO 2 PCB Block Diagram 360B MM 7-19...
  • Page 237 VNA’s I/O processor turns on the buffer ampli- fier sending the first local oscillator signal to the A12T Power Amplifier Assembly. In the direct mode (40 to 270 MHz), the A12T Power Amplifier is turned off and the first local oscillator signal is attenuated. 7-20 360B MM...

  • Page 238: A5T Lo 1 Pcb Circuit Description

    W I N D O W TO I / O PROCE SS OR C O M P A R A T O R VI A A6 T, A16 ( VNA) Figure 7-7. A5T LO 1 PCB Block Diagram 360B MM 7-21...

  • Page 239: A6T Digital Interface Pcb Circuit Description

    The power regulation and filtering circuitry regulates and filters the +8 Vdc, –18 Vdc, and +18 Vdc from the VNA, producing the +5 Vdc to power the A6T PCB and the +15 Vdc and –15 Vdc to power the A8T, A10T, and A12T PCBs. 7-22 360B MM...
  • Page 240 LATCH CIRCUITS STROBE STROBE 0 - 7 INPUTS DECODE FROM 8 - 31 OUTPUTS 360 VNA +18V POWER +15V POWER TO A8T, -18V REGULATION A10T, A12T AND FILTERING -15V Figure 7-8. A6T Digital Interface PCB Block Diagram 360B MM 7-23...

  • Page 241: A7T Attenuator Driver Pcb Circuit Description

    PCB, to activate the selected latch and coil driver circuit to set the step attenuator to this value. Using this same method, the VNA acti- vates the bias enable circuit to enable PORT 1 and PORT 2 bias voltage. 7-24 360B MM...
  • Page 242 TO PORT 2 LATCH TEST ATTENUATOR COIL DRIVER PORT 2 TEST ATTN STROBE PORT 1 BIAS IN PORT 1 BIAS OUT PORT 2 BIAS OUT PORT 2 BIAS IN BIAS ENABLE Figure 7-9. A7T Attenuator Driver PCB Block Diagram 360B MM 7-25...

  • Page 243: A23T Motherboard Pcb Circuit Description

    It also provides electrical inter- DESCRIPTION face to the VNA through the rear panel SIGNAL and CONTROL connec- tors. Additionally, the A23T PCB holds the connectors that are the physical interface to the PCB assemblies of the test set. 7-26 360B MM...

  • Page 244: A24T Source Lock/Reference Select Assembly Circuit Description

    2.25 MHz bandpass filter to select only the desired 2.25 MHz second IF signal. The signal output from the filter is buffered and sent to the VNA’s A6 PCB where it becomes the source lock reference frequency. 360B MM 7-27...
  • Page 245 The power filtering and regulation circuitry filters and regulates the +8 Vdc, –18 Vdc, and +18 Vdc from the VNA, producing the +5 Vdc, –8 Vdc, +15 Vdc, and –15 Vdc required to power the A27T circuitry. 7-28 360B MM...

  • Page 246: A27T Amplifier/ Switch Driver Pcb Circuit Description

    40 - 60 GHz BANDSWITCH/ LOAD STROBES +5Vdc TO A30T AMPLIFIER POWER +5Vdc TO A31T +8 Vdc POWER TO A9T +18 Vdc FILTERING SAMPLER BIAS REGULATION -18 Vdc TO A11T Figure 7-10. A27T Amplifier/Switch Driver PCB Block Diagram 360B MM 7-29...
  • Page 247 Buffer Ampli- grouped as a single unit. the buffer amplifier/ sam- fier/ Sampler pler assembly has a single WILTRON part number Assemblies and is always replaced as a single unit. The part number and serial number are found on the buffer amplifier.

  • Page 248: Rf Deck Assembly Descriptions

    The T , and R second IF signal outputs go to the A24T Source Lock/Reference Select Assembly, and the T second IF output goes to the A1T Channel B IF Amplifier PCB. 360B MM 7-31...

  • Page 249: A12T Power Amplifier Assembly

    +15V power. When the test set is operating in the heterodyne mode, the power amplifier amplifies the first local oscillator signal. This signal causes the harmonic generator to produce harmonic pulses that are necessary for heterodyning to take place in sam- plers A9T and A11T. 7-32 360B MM...

  • Page 250: A13T Transfer Switch Assembly

    Signal splitting is accomplished in the A28T and A29T SPDT/Splitter Switch assemblies for fre- quencies in the 40 MHz to 40 GHz range. It is accom- plished in the A30T and A31T Tripler assemblies for frequencies above 40 GHz. 360B MM 7-33...

  • Page 251: A14T/A15T Coupler / Connector Assemblies

    MHz) signal from the VNA A3 PCB and Assembly divides it between three paths of equal impedance: A1T, A2T, and A3T. This enables the same oscillator (LO 3) to drive all three mixer circuits with equal amplitude and minimum loss. 7-34 360B MM...

  • Page 252: A17T Reference Delay Mounting Bracket

    RF. In this way, the bias tee assemblies provide dc bias volt- age to the active DUTs with minimum signal loss. 360B MM 7-35...

  • Page 253: A20T, A21T, And A22T Step Attenuators

    A12T Power Ampli- Assembly: fier assembly into two paths of equal impedance. The two paths supply signals that are rich in har- monics to the A9T and A11T Samplers for heterodyn- ing. 7-36 360B MM...

  • Page 254: A28T And A29T Spdt/Splitter Switch Assemblies

    A30T and A31T Tripler assemblies. When the VNA is in the above 40 GHz range, the switches are positioned such that the RF signal is routed to the inputs of the A30T and A31T Tripler as- semblies. 360B MM 7-37...

  • Page 255: A30T And A31T Tripler Assemblies

    A28T and A29T. The split RF signal is sent through the multiplexer couplers of A30T and A31T to PORT 1 and PORT 2 and on to the reference channels. ∗ Test Set Models 3613A and 3623A only ∗∗ Test Set Models 3615A and 3625A 7-38 360B MM...
  • Page 256 Chapter 8 3630A/3631A Test Sets Information Table of Contents INTRODUCTION ......8-3 INSTALLATION AND OPERATION ....8-3 FUNCTIONAL DESCRIPTION .

  • Page 257: Introduction

    VNA front panel. These test sets can be configured by the user to address a wide variety of applications. Information pertaining to the operation of these test sets is provided in Appendix A, at the rear of this manual. 360B MM...

  • Page 258: Functional Description

    (T , or R ). This heterodyning action provides the desired intermedi- ate frequency (IF) of 89 MHz ±4 MHz. The resultant first IF signals are input to buffer amplifiers A8T and A10T. 360B MM...

  • Page 259: Source Lock/Reference Signal Selection

    . The second IF signal source for the A3T Channel IF Amplifier is either T or R . The second IF signal source for the VNA Source Lock circuitry is R for forward measure- ments and R for reverse measurements. 360B MM...
  • Page 260 VNA via the A16T Three-Way Power Divider. This ⁄ kHz calibration signal goes directly to the gain- ranging amplifiers. These amplifier are then auto- matically calibrated to assure optimum accuracy and predictability of the Channel IF Amplifier outputs. 360B MM...
  • Page 261 "T" i ndi cat e ass emb lie s i n t he tes t s et. O U T Al l o ther s a re i n th e 36 0 main frame. 360SS69 Figure 8-1. Models 3630A/3631A Block Diagram 360B MM...
  • Page 262 TEST CHANNEL B I.F. AMPLIFIER PCB CHANNEL B BUFFER AMPLIFIER A12T SOURCE POWER LOCK OUTPUT AMPLIFIER ASSY. ATTENUATOR SOURCE DRIVER PCB LOCK INPUT A21T STEP RF OUT ATTENUATOR RF IN SPLITTER 360TS02.DWG Figure 8-2. Model 3630A/3631A Assembly Locations 360B MM...

  • Page 263: A1T, A2T, And A3T Channel If Amplifier Pcb Circuit Description

    These signals are sent via the A6T Digital Control PCB to the VNA. Responding to these signals, the VNA sends data through A6T to con- trol the gain ranging amplifiers maintaining the peak signal level be- tween 0 and –24 dB. 360B MM...
  • Page 264 The outputs are then measured and compared to ex- pected values. The VNA then trims each of the amplifiers using a software algorithm to achieve optimum accuracy and predictability. 8-10 360B MM...
  • Page 265 TO 360 VNA SYNC DETECTOR PEAK DETECTOR WINDOW COMPARATOR > 0 dB > -12 dB > -24 dB TO I/O PROCESSOR VIA A6T, A16 (VNA) Figure 8-3. A1T, A2T, and A3T Channel IF Amplifier PCB Block Diagram 360B MM 8-11...

  • Page 266: A4T Lo 2 Pcb Circuit Description

    The buffer amplifier outputs are the second local oscillator fre- quencies and have a frequency range from 12.25 MHz (divide by 8) to 272.25 MHz (divide by 1). 8-12 360B MM...
  • Page 267 LOOP GAIN LO 1 PROCESSOR OUTPUT LO 2 VIA A6T, A16 (VNA) CONTROL V 0 DETECTOR LO 3 T0 A2 (VNA) WINDOW TO I/O PROCESSOR COMPARATOR VIA A6T, A16 (VNA) Figure 8-4. A4T LO 2 PCB Block Diagram 360B MM 8-13...

  • Page 268: A5T Lo 1 Pcb Circuit Description

    VNA’s I/O processor turns on the buffer ampli- fier sending the first local oscillator signal to the A12T Power Amplifier Assembly. In the direct mode (40 to 270 MHz), the A12T Power Amplifier is turned off and the first local oscillator signal is attenuated. 8-14 360B MM...
  • Page 269 W I N D O W TO I / O PROCE SS OR C O M P A R A T O R VI A A6 T, A16 ( VNA) Figure 8-5. A5T LO 1 PCB Block Diagram 360B MM 8-15...

  • Page 270: A6T Digital Interface Pcb Circuit Description

    The power regulation and filtering circuitry regulates and filters the +8 Vdc, –18 Vdc, and +18 Vdc from the VNA, producing the +5 Vdc to power the A6T PCB and the +15 Vdc and –15 Vdc to power the A8T, A10T, and A12T RF modules. 8-16 360B MM...
  • Page 271 LATCH CIRCUITS STROBE STROBE 0 - 7 INPUTS DECODE FROM 8 - 31 OUTPUTS 360 VNA +18V POWER +15V POWER TO A8T, -18V REGULATION A10T, A12T AND FILTERING -15V Figure 8-6. A6T Digital Interface PCB Block Diagram 360B MM 8-17...

  • Page 272: A23T Motherboard Pcb Circuit Description

    It also provides electrical inter- DESCRIPTION face to the VNA through the rear panel SIGNAL and CONTROL connec- tors. Additionally, the A23T PCB holds the connectors that are the physical interface to the PCB assemblies of the test set. 8-18 360B MM...

  • Page 273: A24T Source Lock/Reference Select Assembly Circuit Description

    2.25 MHz bandpass filter to select only the desired 2.25 MHz second IF signal. The signal output from the filter is buffered and sent to the VNA’s A6 PCB where it becomes the source lock reference frequency. 360B MM 8-19...

  • Page 274: Rf Deck Assembly Descriptions

    Buffer Ampli- grouped as a single unit. the buffer amplifier/ sam- fier/ Sampler pler assembly has a single WILTRON part number Assemblies and is always replaced as a single unit. The part number and serial number are found on the buffer amplifier.

  • Page 275: A12T Power Amplifier Assembly

    +15V power. When the test set is operating in the heterodyne mode, the power amplifier amplifies the first local oscillator signal. This signal causes the harmonic generator to produce harmonic pulses that are necessary for heterodyning to take place in sam- plers A9T and A11T. 360B MM 8-21...

  • Page 276: A16T Power Divider Assembly

    The A17T assembly is the control output mounting Control Out- bracket. This mechanical assembly has three connec- put Mount- tors for the external connection of WILTRON compo- nents (two step attenuators and a transfer switch). ing Bracket A21T The A21T 0–70 dB Step Attenuator assembly con- 0–70 dB Step...
  • Page 277 Chapter 9 3635B Test Set Information Table of Contents INTRODUCTION ......9-3 mm-WAVE VNA SYSTEM CONFIGURATION ..9-3 FUNCTIONAL DESCRIPTION .

  • Page 278: Introduction

    PCB descriptions, and RF deck assembly descrip- tions. mm-WAVE VNA SYSTEM Figure 9-2 shows a functional block diagram of the WILTRON mm- CONFIGURATION wave VNA system. This configuration includes instrumentation func- tions from each of the three basic building blocks of a VNA system:...
  • Page 279 — especially phase accuracy. The mm-wave VNA system phase-locking scheme is unique among the WILTRON VNA family. The system multiple phase-lock loops provide a stable set of four 2.25 MHz IF frequencies. The primary frequency ref- erence for the system is the internal 10 MHz reference in the Model 6729B Swept Frequency Synthesizer or 68147A Synthesized Signal Generator;...

  • Page 280: Mm-Wave Modules Description

    3640B-W 75 to 110 WR-10 Table 9-2. Model 3641B-X Transmis- sion Modules Frequency Waveguide Model Range (GHz) Flange 3641B-Q 33 to 50 WR-22 3641B-U 40 to 60 WR-19 3641B-V 50 to 75 WR-15 3641B-W 75 to 110 WR-10 360B MM...
  • Page 281 The RF IN (6729B/68147A) output is multiplied 4 times:16.5 GHz x 4 = 66.0 GHz Notice that the resulting difference between the LO IN and RF IN frequencies is 270 MHz, the first IF value. Figure 9-1. mm-Wave Module Frequency Determination 360B MM...
  • Page 282 L O C A L O SC IL L A T O R CONTROL CAL/3RD L . O. = 2 1 / 3 MHz CAL = 8 3 1 / 3 K Hz L.O. EXT FM ∅ LOCK OUTPUT Figure 9-2. mm-Wave VNA System Block Diagram 360B MM...
  • Page 283 BUFFER AMPLIFIER PORT 1 I/O A22T PORT 2 L.O AMPLIFIER A17T A20T PORT 2 I/O RF IN AMPLIFIER RF DECK A21T FAN ASSY. PORT 1 L.O. AMPLIFIER L.O. A11T INPUT SPLITTER INPUT 360TS05.DWG Figure 9-3. Model 3635B Assembly Locations 360B MM...

  • Page 284: A1T, A2T, And A3T Channel If Amplifier Pcb Circuit Description

    These signals are sent via the A6T Digital Control PCB to the VNA. Responding to these signals, the VNA sends data through A6T to con- trol the gain ranging amplifiers maintaining the peak signal level be- tween 0 and –24 dB. 360B MM...
  • Page 285 The outputs are then measured and compared to ex- pected values. The VNA then trims each of the amplifiers using a software algorithm to achieve optimum accuracy and predictability. 9-10 360B MM...
  • Page 286 TO 360 VNA SYNC DETECTOR PEAK DETECTOR WINDOW COMPARATOR > 0 dB > -12 dB > -24 dB TO I/O PROCESSOR VIA A6T, A16 (VNA) Figure 9-4. A1T, A2T, and A3T Channel IF Amplifier PCB Block Diagram 360B MM 9-11...

  • Page 287: A4T Lo 2 Pcb Circuit Description

    The buffer amplifier outputs are the second local oscillator fre- quencies and have a frequency range from 12.25 MHz (divide by 8) to 272.25 MHz (divide by 1). 9-12 360B MM...
  • Page 288 LOOP GAIN LO 1 PROCESSOR OUTPUT LO 2 VIA A6T, A16 (VNA) CONTROL V 0 DETECTOR LO 3 T0 A2 (VNA) WINDOW TO I/O PROCESSOR COMPARATOR VIA A6T, A16 (VNA) Figure 9-5. A4T LO 2 PCB Block Diagram 360B MM 9-13...

  • Page 289: A5T Power Distribution Pcb Circuit Description

    INFORMATION A5T POWER The A5T Power Distribution PCB filters and regulates the raw volt- DISTRIBUTION PCB ages received from the 360B VNA and distributes them throughout the CIRCUIT DESCRIPTION test set. A6T DIGITAL INTERFACE The A6T Digital Interface PCB (Figure 9-6) provides digital interface PCB CIRCUIT between the VNA and test set.

  • Page 290: A6T Digital Interface Pcb Circuit Description

    LATCH CIRCUITS STROBE STROBE 0 - 7 INPUTS DECODE FROM 8 - 31 OUTPUTS 360 VNA +18V POWER +15V POWER TO A8T, -18V REGULATION A10T, A12T AND FILTERING -15V Figure 9-6. A6T Digital Interface PCB Block Diagram 360B MM 9-15...

  • Page 291: A23T Motherboard Pcb Circuit Description

    It also provides electrical inter- DESCRIPTION face to the VNA through the rear panel SIGNAL and CONTROL connec- tors. Additionally, the A23T PCB holds the connectors that are the physical interface to the PCB assemblies of the test set. 9-16 360B MM...

  • Page 292: A24T Source Lock/Reference Select Assembly Circuit Description

    2.25 MHz bandpass filter to select only the desired 2.25 MHz second IF signal. The signal output from the filter is buffered and sent to the VNA’s A6 PCB where it becomes the source lock reference frequency. 360B MM 9-17...

  • Page 293: Rf Deck Assembly Descriptions

    A16T Power The A16T Power Splitter receives the 3rd Local Os- Splitter Mi- cillator/ Cal signal from the 360B VNA A3 PCB and crocircuit routes three similar signals to the A1T, A2T, and A3T IF Amplifiers.
  • Page 294 Chapter 10 360SSXX Signal Source Information Table of Contents 10-1 INTRODUCTION ......10-3 10-2 REPLACEABLE SUBASSEMBLIES ....10-3 10-3 TROUBLESHOOTING .
  • Page 295 10-12 RF DECK MODULE DESCRIPTIONS ... . 10-37 Oscillators ......10-37 MOD (Modulator) .
  • Page 296 10-19 2-8 GHz BAND (OSC 1) TRACKING FILTER ADJUSTMENTS ....10-64 10-20 2 GHz BANDSWITCH COMPENSATION ADJUSTMENT . 10-65 10-21 ALC LOOP ADJUSTMENTS ....10-66 ALC Loop Bandwidth .
  • Page 297 10-29 REMOVE AND REPLACE THE DIRECTIONAL COUPLER 10-85 Preliminary ......10-85 Procedure ......10-85 10-30 REMOVE AND REPLACE THE DOWN CONVERTER .

  • Page 298: Introduction

    SUBASSEMBLIES be exchanged. Upon request and typically within 24 hours, WILTRON or a Wiltron/Anritsu Service Center will ship an exchange module. The customer has 30 days in which to return the defective item. All ex- change parts are warranted for 90 days from the date of shipment or for the balance of the original-part warranty—whichever is longer.

  • Page 299: Troubleshooting

    Table 10-1. Overall Troubleshooting Procedure (1 of 4 ) Symptom Procedure 301 LOCK FAILURE —-DE Because of the 360B’s phase-lock loop structure, this is the most difficult system failure to troubleshoot. There are at least 30 different circuits or components that can cause this error code.
  • Page 300 If you have determined that the problem is in the source, the following procedure will help to isolate it to a subassembly. Determine the frequency band or bands in which the sweep slows down, as follows: 10-8 360B MM...
  • Page 301 FM coils used with the YIG oscillators are not open or shorted to ground. (You will have to remove the source from the console to make this check.) 360B MM 10-9...
  • Page 302 110 SRC ID ERROR above. The difference between this message and the 110 message is that 110 occurs only on power-up. Error code 400 occurs at anytime a peripheral fails to respond to a request for service. 10-10 360B MM...
  • Page 303 F = low frequency value—Example: 0.010 H = high frequency value—Example: 40.0 P = high power value—Example: 00 W = low power value—Example: -12 If the above message is not returned, replace the A1 PCB (paragraph 10-25). 360B MM 10-11...
  • Page 304 To determine whether the A4 PCB or other ALC loop components may be the cause of the error message Use the 360B VNA to program the source for a predetermined frequency. As follows: On the source, disconnect the BNC cable from the PHASE LOCK INPUT connector.
  • Page 305 If the power level is not proper, replace the A4 PCB and coupler. G P IB . SOURCE OUTPUT HP 85 CONTROLLER POWER SENSOR POWER METER Figure 10-1. Test Setup for Programming a Series of Power Levels 360B MM 10-13...
  • Page 306 25). However, if the frequency is incorrect in only one band, then replace the applicable YIG Driver PCB (A6-A9), YIG Oscillator and attaching parts, and RF deck mounted transistors for the affected band (Figure 10- 25 or 10-26). 10-14 360B MM...
  • Page 307 SIGNAL SOURCE INFORMATION TROUBLESHOOTING GPIB SOURCE RF OUT HP 85 CONTROLLER FREQUENCY COUNTER Figure 10-2. Test Setup for Programming a Series of Frequencies 360B MM 10-15/10-16...

  • Page 308: Overall Circuit Description

    A6 PCB. The FM coil tuning current is derived from the external FM signal. This signal comes from the rear panel, via the EXT FM ∅LOCK INPUT connector. Paragraph 10-10 describes the A10 PCB. 360B MM 10-17...

  • Page 309: A14 Motherboard Pcb

    RF components. Paragraph 10-12 describes this subassembly. Model Dependent Circuits—360SS69 The model-dependent circuits and components for this model are also shown in Figure 10-4. The circuit description is similar to that for the Model 360SS47 described above. 10-18 360B MM...
  • Page 310 U NIVER SA L C IRC UITS (A LL MOD ELS) T R ACK F I L T ER 1 M O D E L DE P E ND E N T C I R C U I T S Figure 10-3. Model 360SS45/47 Overall Block Diagram 360B MM 10-19...
  • Page 311 U NIVER SA L C IRC UITS (A LL MOD ELS) T R ACK F I L T ER 1 M O D E L DE P E ND E N T C I R C U I T S Figure 10-4. Model 360SS69 Overall Block Diagram 10-20 360B MM...

  • Page 312: Gpib Setup And Interconnection

    To accomplish this interconnection, a special cable is required. This cable – WILTRON Part No. 2100-1, -2, -4 or -5 (1, 2, 4 or 5 meters in length) – is available from the factory.
  • Page 313 The Level Amp and its associated input circuitry gives the A4 PCB overall control over the level of the signal source output power signal. The remaining block is the Compensation circuit. This circuit stabilizes the loop. 10-22 360B MM...

  • Page 314: A4 Alc Pcb Circuit Description

    PARAMETER) PRE- AMP/ SHAPER * This figure does not show all of the inputs that are summed into the level amp. See the A4 PCB overall block diagram for complete circuit. Figure 10-5. ALC Loop Block Diagram 360B MM 10-23...
  • Page 315 This 12-bit group is formed using two 8-bit words (the remaining 4-bits in word number 1 are not used). The input digital group is loaded into the Step Frequency DAC when the microprocessor clocks SP3 and SP4 LOW. 10-24 360B MM...

  • Page 316: A5 Frequency Instruction Pcb Circuit Description

    RF SLOPE FCEN DAC CONTROL 16 BITS FCEN DECODER LATCH 2 TE ST FCEN FCEN/VPF NORM LATCH 1 MICROPROCESSOR STEP FREQ DAC - 12 BITS +10V REF -10V REF Figure 10-6. A5 Frequency Instruction PCB Block Diagram 360B MM 10-25...

  • Page 317: Overall Frequency Generation

    L PIN Select line causes the S/C- band element in the PIN Switch to turn off. This action attenu- ates by 60 dBc or less the feedthrough of the S/C-band YIG oscil- lator signal. 10-26 360B MM...
  • Page 318 The SNB and SNR lines on the A7 PCB toggle from low to high and select the Ku-Band YIG oscillator and ROM. The Ku-band (A8 PCB) and K-band (A9 PCB) circuit action is similar to that de- scribed for S/C and X bands. 360B MM 10-27...

  • Page 319: A6-A9 Yig Driver Pcb Circuit Description

    The A5 PCB linearizer ROM circuit provides compensation for its asso- ciated YIG oscillator. Many YIG oscillators, though inherently linear, often have linearity errors due to magnetic saturation effects. This ROM provides for up to ±64 MHz of frequency correction. 10-28 360B MM...
  • Page 320 FC B 1 -7 LINE AR ITY RO M RAB1 - 7 NOTE: THE " L" THAT PREFACES THE SIGNAL LINE NAMES IND ICATES LINE'S ACTIV E S TATE: LOW OR HIGH. Figure 10-7. A6–A9 YIG Driver PCB Block Diagram 360B MM 10-29...

  • Page 321: A10 Fm/ Attenuator Pcb Circuit Description

    This filter is a high-Q YIG bandpass filter that resides in the same module as the YIG oscillator. It is in series with the YIG oscilla- tor and tracks at the same frequency. It attenuates harmonic and spuri- ous signals. 10-30 360B MM...
  • Page 322 S EN S E H IGH C U R R E N T D R IV E R S FOR ATTN 1-4 11 0 d B A TTE N U A TOR Figure 10-8. A10 FM/Attenuator PCB Block Diagram 360B MM 10-31...

  • Page 323: Switching Power Supply Circuit Description

    Because this power supply references portions of its circuitry to the peak negative or positive line voltage, you must use an isolation transformer to protect test instruments. 10-32 360B MM...
  • Page 324 This waveform is coupled to the five secondaries of the 50 kHz Power Transformer. The reduced voltages appearing in the transformer secon- daries are also proportional to the line voltage. These reduced voltages are rectified and passed through inductors which function as integra- tors. 360B MM 10-33...
  • Page 325 If either the line voltage is incorrect or the PCB is improperly positioned, the appropriate L HL or L LL diagnostic line will go TRUE, and the LED indicator will light. 10-34 360B MM...
  • Page 326 LINE OUT OF REG OFF-LINE VOLT- RECTIFIER SHUT DOWN +15V +15V LINE SENSE FROM SHUT +18V DOWN TIMER RECTIFIER A1A14 HIGH LINE L LL MOTHERBOARD L HL AC LINE VOLTAGE Figure 10-9. Switching Power Supply Block Diagram 360B MM 10-35...
  • Page 327 (TO A4 PCB) THERMISTOR (TO A4 PCB) DOWN DOWN <2 GHz <2 GHz CONVERTER CONVERTER (TO A4 PCB) (TO A4 PCB) 360SS47 RF DECK 360SS69 RF DECK Figure 10-10. Model 360SS47 and 360SS69 RF Deck Block Diagrams 10-36 360B MM...

  • Page 328: Oscillators

    0.01 to 2 GHz output. Coupler The Coupler samples and detects the 2 GHz RF out- put for use in internal power leveling. The detected sample, along with a voltage representing the cou- pler’s temperature, is routed to the A4 PCB. 360B MM 10-37/10-38...

  • Page 329: Confidence Test

    Tektronix Inc. Vertical Sensitivity: 2 mV/division Model 2445 Horizontal Sensitivity: 50 ns/division Spectrum Ana- Frequency Range: 0.01 to 100 GHz Tektronix Inc. lyzer with Ex- Resolution Bandwidth: 100 Hz Model 494 ternal Mixer with External Mixer (PN 015-300085-00) 360B MM 10-3910-40...
  • Page 330 SIGNAL SOURCE CONFIDENCE INFORMATION TEST HP85 CONTROLLER IEEE-488 BUS GPIB INTERCONNECT CABLE SYSTEM BUS INTERCONNECT CABLE Figure 10-11. Test Equipment Setup for Confidence Test 360B MM 10-41...

  • Page 331: Testing The Alc Loop

    P vari- able. Repeat for the next frequency/power level. If the power level is within the ±2 dB tolerance window, the ALC loop can be assumed to be function- ing properly. 10-42 360B MM...
  • Page 332 SIGNAL SOURCE ALC LOOP INFORMATION TEST G P IB . SOURCE OUTPUT HP 85 CONTROLLER POWER SENSOR POWER METER Figure 10-12. Test Equipment Setup for ALC Loop Confidence Test 360B MM 10-43...

  • Page 333: Testing The Frequency Generation Subsystem

    ±40 MHz of the frequency entered for the program’s “A” variable. Repeat for the next frequency. If the measured frequencies are within their toler- ance window, the Frequency Generation Subsystem can be assumed to be functioning properly. 10-44 360B MM...
  • Page 334 SIGNAL SOURCE FREQUENCY GENERATION INFORMATION SUBSYSTEM TEST GPIB SOURCE RF OUT HP 85 CONTROLLER FREQUENCY COUNTER Figure 10-13. Test Equipment Setup for Frequency Generation Subsystem Confidence Test 360B MM 10-45...

  • Page 335: Testing

    Observe that the frequency counter indicates the programmed frequency, +24 MHz ± 2.4 MHz. If the shifts in frequency are within the tolerance windows, the A10 PCB phase-lock circuits can be as- sumed to be functioning properly. 10-46 360B MM...
  • Page 336 SIGNAL SOURCE FM PHASE-LOCK INFORMATION TEST POWER SUPPLY GPIB SOURCE TO PHASE LOCK INPUT RF OUT HP85 CONTROLLER FREQUENCY COUNTER Figure 10-14. Test Equipment Setup for FM Phase-Lock Confidence Test 360B MM 10-47/10-48...

  • Page 337: Adjustment Procedures

    SIGNAL SOURCE ADJUSTMENT INFORMATION PROCEDURES 10-14 ADJUSTMENT This paragraph provides adjustment procedures that you should per- PROCEDURES form following the repair or replacement of printed circuit boards (PCBs), which are listed in Table 10-6. 360B MM 10-49...
  • Page 338 2–8 GHz Band (Osc 1) Tracking Filter Adjustments (page 10-62) 2 GHz Bandswitch Compensation Adjustment (page 10-63) ALC Loop Calibration and Adjustments (page 10-64) A7–A9 Same as above, except 2 GHz Bandswitch Compensation Adjustment A10 PCB None A13 PCB Power Supply Adjustments (page 10-70) 10-50 360B MM...

  • Page 339: Recommended Test Equipment

    Bandwidth: DC to 150 MHz Tektronix Inc. Vertical Sensitivity: 2 mV/division Model 2445 Horizontal Sensitivity: 50 ns/division Spectrum Frequency Range: 0.01 to 100 GHz Tektronix Inc. Analyzer with Resolution Bandwidth: 100 Hz Model 494 External Mixer with External Mixer (PN 015-300085-00) 360B MM 10-51...

  • Page 340: A5 Pcb Frequency Adjustments

    Connect the digital multimeter leads between A5TP3 (+) and A5TP1 (–). Verify that the digital multimeter indicates –10 ± 0.1V. Step 7. NOTE Steps 8 thru 12 are not routine adjustments. They should be performed only if A5U10 has been replaced. 10-52 360B MM...
  • Page 341 A5TP1; contact the other end of the jumper first to A5U6, pin 3, then to A5U6, pin 2. Step 11. Connect the digital multimeter test leads between A5TP5 (+) and A5TP4 (–). Step 12. Adjust A5R8 for 0V ±50 µV. Figure 10-16. A5 PCB Component Locations 360B MM 10-53...

  • Page 342: A6-A9 Yig Oscillator Bandswitch Adjustments

    Enter 2 GHz on controller keyboard. Step 8. Connect the digital multimeter test leads between A6TP5 (+) and A6TP1 (–) (Figure 10-17). Step 9. Adjust A6R67 counterclockwise for 0V (TTL low). Step 10. Readjust A6R67 clockwise for +5V (TTL high). 10-54 360B MM...

  • Page 343: A6 Pcb, 8 Ghz

    Step 1. Enter 8 GHz on controller keyboard. Step 2. Move the digital multimeter (+) lead to A6TP3. Step 3. Adjust A6R49 (Figure 10-17) counterclock- wise for 0V (TTL low). Step 4. Readjust A6R49 clockwise for +5V(TTL high). 360B MM 10-55...

  • Page 344: A7 Pcb

    A8TP3 (+) and A8TP1 (–) (Figure 10-18). Step 3. Adjust A8R49 counterclockwise for 0V (TTL low). Step 4. Readjust A8R49 clockwise for +5V (TTL high). Step 5. When bandwidth adjustment is com- pleted, move A5P3 jumber to pins 1 and 2. 10-56 360B MM...

  • Page 345: A9 Pcb

    26.3 GHz; then increment frequency by 0.1 GHz until DMM switches from 0V to +5V. (That is the bandswitch frequency). Step 5. Adjust A9R49 counterclockwise for 0V (TTL low). Step 6. Readjust A9R49 clockwise for +5V (TTL high). 360B MM 10-57...

  • Page 346: A6-A9 Yig Bias Check

    A9 PCB YIG For 360SS69, check the non-adjustable bias voltage on the 18–26.5 GHz YIG oscillator, as follows: Step 1. Connect the digital multimeter between A9TP4 (+) and A9TP1 (–) (Figure 10-18). Step 2. Verify voltage is +12V. 10-58 360B MM...

  • Page 347: Frequency Adjustments

    Step 10. Wait 10 seconds for the frequency to settle. Step 11. Adjust A6R6 (Figure 10-17) for 7.9 GHz ±2 MHz. Step 12. Repeat steps 6 thru 11 until the two frequencies are within their 2 MHz toler- ance. 360B MM 10-59...

  • Page 348: Ghz Band

    Repeat steps 1 thru 4 two more times, to set the YIG’s hysteresis. Step 6. Enter 8.1 GHz on controller keyboard. Step 7. Wait 10 seconds for the frequency to settle. Step 8. Adjust A7R12 (Figure 10-18) for 8.1 GHz ±2 MHz. 10-60 360B MM...

  • Page 349: Oscillator 3

    Step 12. Adjust A8R6 (Figure 10-18) for 17.9 GHz ±2 MHz, for the 360SS69; or 20 GHz ±2 MHz, for the 360SS47. Step 13. Repeat steps 6 thru 11 until the two fre- quencies are within their ±2 MHz toler- ances. 360B MM 10-61...

  • Page 350: Oscillator 4

    10-16) on controller keyboard. Step 4. Wait 10 seconds for the frequency to settle. Step 5. Repeat steps 1 thru 4 two more times, to set the YIG’s hysteresis. Step 6. Enter1 18.1 GHz on controller keyboard. 10-62 360B MM...
  • Page 351 Step 10. Wait 10 seconds for the frequency to settle. Step 11. Adjust A9R6 (Figure 10-18) for 26.5 GHz. Step 12. Repeat steps 6 through 11 until the two frequencies are within their ±2 MHz toler- ances. 360B MM 10-63...

  • Page 352: Ghz Band (Osc 1) Tracking

    Step 11. Verify output power exceeds the RESET power level (+10 dBm for 360SS47 or +5 dBm for 360SS69). Step 12. Repeat steps 10 and 11 for 3 GHz, 4 GHz, 5 GHz, 6 GHz, and 7 GHz. 10-64 360B MM...

  • Page 353: Ghz Bandswitch Compensation Adjustment

    A6 PCB, or when a frequency shift is detected. The adjustment consists of setting a resistor to a predetermined point. Step 1. Turn A6R80 (Figure 10-17) clockwise for a full rotation . Step 2. Turn A6R80 counterclockwise 1/8 of a rotation. 360B MM 10-65...

  • Page 354: Alc Loop Adjustments

    Reinstall the A4 PCB and press the POWER switch to ON. NOTE Steps 5 through 9 describe how to adjust the function generator for a 10 kHz squarewave at a voltage that causes a 10 dB excursion of the signal source output signal. 10-66 360B MM...
  • Page 355 10 OUTPUT 705;"LVLXDB" Step 8. Observe that the oscilloscope trace de- flects upward, and note the graticule line that the trace rests on. This graticule line is now the reference for the minimum out- put power signal. 360B MM 10-67...

  • Page 356: Osc 1 (A4/A6 Pcbs) Loop

    5 GHz. Osc 2 (A7 Adjust the A7 PCB ALC loop bandwidth as follows: PCB) Loop Step 1. Enter 10 GHz on controller keyboard. Step 2. Adjust A7R33 (Figure 10-18) for the best square wave response (least distortion). 10-68 360B MM...
  • Page 357 If 360SS69, continue to OSC 4 (A9 PCB) Loop. If 360SS47, turn line power off, withdraw the A4 PCB, and disconnect the function generator. Step 4. Reinstall the A4 PCB and press the POWER switch back to ON. 360B MM 10-69...

  • Page 358: Osc 4 (A9 Pcb) Loop

    Enter 7.9 GHz on controller keyboard. Step 4. Adjust A4R6 for minimum jitter. Power Level Adjust output power as follows: Step 1. Reset the 360SS by cycling the line power off and on. Step 2. Enter 2.1 GHz on controller keyboard. 10-70 360B MM...

  • Page 359: Rf Slope

    Set the power to 10 dBm, type: 10 OUTPUT 705;"LVL10DM" c. Adjust A4R66 (Figure 10-20) for +10 dBm ±0.5 dB. d. Repeat step 1(a) for 2.1 GHz and ver- ify that the power level is 10 dBm. If not, readjust A4R66 as required. 360B MM 10-71...

  • Page 360: Power Supply Adjustments

    Stop. Step 3. While counting the number of potentiome- ter turns, continue to adjust A14R89 coun- terclockwise until the indicator lights. Stop. Step 4. Readjust A14R89 clockwise, halfway be- tween the indicator’s on and off states. 10-72 360B MM...

  • Page 361: Low Line Voltage

    Adjust A14R79 (LOW) (Figure 10-23) to its clockwise limit; then readjust counter- clockwise until the A14 LOW LINE indica- tor lights. Step 6. Readjust the variac for 115 Vac (nominal line voltage), and ensure that the LOW LINE indicator is not lit. 360B MM 10-73...

  • Page 362: High Line Voltage

    Adjust A14R80 (HIGH) (Figure 10-23) to its clockwise limit; then readjust counter- clockwise until the HIGH LINE indicator lights. Step 4. Readjust the variac for 115 Vac (nominal line voltage), and ensure that the HIGH LINE indicator is not lit. 10-74 360B MM...
  • Page 363 XA04 R112 RN04 RN02 XA03 R138 R139 XA02 R141 R137 XA01 SW01 TP01TP02 TP03 TP04 TP05TP06 DSO1 DSO2 DSO3 DSO4 DSO5 HIGH LINE LOW LINE Figure 10-23. A14 Motherboard PCB, Test Point, Connector, Indicator, and Adjustment Locations 360B MM 10-75/10-76...

  • Page 364: Remove And Replace Procedures

    Step 3. Slide the top and bottom covers toward the rear and remove. Side Covers Step 1. Remove top and bottom covers. Step 2. Grasp rack-slide handle at front, and slide side panels to the rear and remove. 360B MM 10-77...

  • Page 365: Remove And Replace Pcbs (Except A13)

    All of the referenced PCBs con- DECK tain static-sensitive compo- nents. Refer to Figure 1-2, page 1-10, for precautionary instructions. Failure to follow these instructions may result in damage to the PCB. RETAINER Figure 10-24. 360SSXX PCB Locations 10-78 360B MM...

  • Page 366: Remove And Replace A13 Switching

    The A13 PCB power supply switch- ing-frequency is in the RF spec- trum (50 kHz). To prevent the radia- tion, insure that the card-cage cover is securely seated and fas- tened with all ten screws before re- applying the ac power. 360B MM 10-79...

  • Page 367: Remove And Replace A Yig Oscillator

    For 8-12 GHz oscillator: Remove connector from Isolator output. (For 360SS69, remove the cable/filter assy between the Isolator and DPDT PIN switch.) Remove connector from P13 on mother- board. Remove two screws from oscillator bot- tom and remove oscillator. 10-80 360B MM...
  • Page 368 Step 5. For 18–26.5 GHz oscillator (360SS69): Remove cable from between oscillator output and multi-port PIN switch. Remove connector from P17 on mother- board. Remove two screws from oscillator bot- tom and remove oscillator. 360B MM 10-81...
  • Page 369 MODEL 360SS47 RF DECK SIGNAL SOURCE COMPONENT LOCATIONS INFORMATION 2-8 GHz 12.4-20 GHz DOWN DIRECTIONAL OSCILLATOR OSCILLATOR CONVERTER SWITCH COUPLER MATCHED ISOLATOR 8-12.4 GHz MODULATOR OSCILLATOR Figure 10-25. 360SS47 RF Deck Component Locations 10-82 360B MM...
  • Page 370 MODEL 360SS69 RF DECK INFORMATION COMPONENT LOCATIONS MULTI-PORT 2-8 GHz 8-12.4 GHz 18-26.5 GHz DOWN DIRECTIONAL ISOLATOR OSCILLATOR SWITCH OSCILLATOR OSCILLATOR CONVERTER COUPLER FREQUENCY DOUBLER DPDT SWITCH MATCHED 12.4-18 GHz MODULATOR OSCILLLATOR Figure 10-26. 360SS69 RF Deck Component Locations 360B MM 10-83...

  • Page 371: Remove And Replace A Pin Switch

    Remove the frequency doubler (para- graph 10-31) to gain access. Remove six cable connectors. Proceed as described above for 360SS47. Step 4. For 360SS69 DPDT PIN switch: Remove six cable connectors. Remove connector from P45 on mother- board. Remove the switch. 10-84 360B MM...

  • Page 372: Remove And Replace The Directional Coupler

    Remove black cable connector from DC OUT on coupler and pull black wire away from adjacent pin. Remove connector from RF IN on cou- pler Remove two screws; pull directional coupler back to free output connector, then remove. 360B MM 10-85...

  • Page 373: Remove And Replace The Down Converter

    For 360SS69: Remove DPDT PIN switch (paragraph 10-28) to gain access. Remove two RF cable connectors. Remove connector from P12 on mother- board. Remove two mounting screws from the underside of the RF deck. Remove the down converter. 10-86 360B MM...

  • Page 374: Remove And Replace The Frequency Doubler

    Step 2. Remove two RF cable connectors. Step 3. Remove two screws, and remove the fre- quency doubler. 360B MM 10-87/10-88...
  • Page 375 POWER LEVEL CONSIDERATIONS ....A-3 360B SYSTEM CONFIGURATIONS USING 363XA TEST SETS ....A-4...

  • Page 376: Introduction

    CONSIDERATIONS puts to avoid compression in the output signals. The reference signal selected for phase lock should be between –10 and –25 dBm. A convenient signal for the reference is available at the source lock out- put connector. 360B MM...

  • Page 377: System Configurations Using 363Xa Test Sets

    360B SYSTEM CONFIGURATIONS APPENDIX A USING 363XA TEST SETS 363XA OPERATION 360B SYSTEM Examples of the use of the 363XA in the 360 Vector Network Analyzer CONFIGURATIONS system are discussed in the following paragraphs. USING 363XA TEST SETS Antenna Test A simple antenna test setup for short distance meas- urements to 40 GHz is shown in Figure A-1.
  • Page 378 A-3) that are confiqured to drive two step attenu- Switch Driv- ators and a transfer switch. Using these connectors and WILTRON components, it is possible to config- ure a 3630A or 3631A for many different applica- tions. Figure A-4 (next page) shows a 3630A configured for full reversing S-Parameter measure- Figure A-2.
  • Page 379 360B SYSTEM CONFIGURATIONS APPENDIX A USING 363XA TEST SETS 363XA OPERATION The switches are controlled by the attenuator con- Table A-1. Attenuator Drive Connector trol in the Reduced Test Signals menu. When the ap- Pin Configuration propriate attenuation is selected, the corresponding...
  • Page 380 3630A REMOTE TO 30 FEET MEASUREMENT TRIGGER 6700 GPIB AND ANALOG REMOTE TO 20 METERS Figure A-5. Switched Transmit Antennas HP33311 SWITCHES PORT 2 SOURCE ATTENUATOR CONNECTOR Figure A-6. Port 2 Source Attenuator Connector Controlling Three HP33311 Switches 360B MM...

  • Page 381: Operation

    Preopera- When a fully reversing test set is used with the Table A-2. S-Parameter Definitions tional Setup, 360B VNA system, the system ratios the relative Discussion magnitude and phase of the S-parameter values for Multi- Meas. the DUT. These S-parameters are equivalent to the Port Chan.
  • Page 382 APPENDIX A 363XA OPERATION OPERATION The 360B VNA system can measure the ratio of any two of the test signals applied to the 363XA test set. The ratio need not be an S-parameter. Either R can be selected as the reference signal.
  • Page 383 APPENDIX A OPERATION 363XA OPERATION Preopera- After the 363XA has been installed in the 360B VNA tional Setup system and the system is turned on, the VNA will Procedure probably display four S-parameters on the screen. Al- though this is consistent with a standard reversing test set, the 363XA Frequency Converter Test Set is not usually used in this mode.
  • Page 384 The name assigned the measurement parame- ter is shown under LABEL. CHANGE NUMERATOR Each of the above can be changed to suit the condi- CHANGE tions of the measurement. DENOMINATOR CHANGE PHASE LOCK CHANGE LABEL PRESS <ENTER> TO SELECT OR SWITCH 360B MM A-11...
  • Page 385 Select CHANGE DE- NOMINATOR in menu SP (page A-11). This calls- up menu PD3 (left). Then, using the method given in Step 3, choose the denominator appropriate for the 1 (UNITY) testing requirements. PRESS <ENTER> TO SELECT A-12 360B MM...
  • Page 386 Control measurement systems using external mixers require control of two sources and receiver. This is accom- plished using the Dual Source Control option which is covered in the Model 360B Vector Network Ana- lyzer System Operator Manual. 360B MM A-13/A-14...
  • Page 387 Appendix B 360ACM Auxiliary Control Module Maintenance Information Table of Contents INTRODUCTION ......B-3 REPLACEABLE SUBASSEMBLIES ....B-3 INSTALLATION .

  • Page 388: Introduction

    If a malfunction occurs in one of these modules, it can be exchanged. Upon request and typically within 24 hours, WILTRON or a Wiltron/Anritsu Service Center will ship an exchange module. The customer has 30 days in which to return the defective item. All ex- change parts are warranted for 90 days from the date of shipment or for the balance of the original-part warranty—whichever is longer.

  • Page 389: Installation

    Connect the auxiliary dc power cable from the rear panel of the ACM to the rear panel POWER DIST SUPPLY connector of the 3635B Test Set. Step 5. Connect the power cable to the ACM Line Module Assembly and to the system console power strip. 360B MM...
  • Page 390 Change to the correct fuse, if necessary, and replace the fuse cartridge. Step 8. Close the cover, and ensure that the desired line voltage value is displayed through the opening in the cover. Step 9. Reinstall the line cord. Figure B-1. Setting the Line Voltage 360B MM...

  • Page 391: Functional Overview

    (via connector J7) and is the RP BNC SIG voltage fed to the 3642A Noise Figure Module (used only with 360NF20A Noise Figure Systems). This voltage is used by the 3642A for amplifier biasing. PREVENTIVE There are no 360ACM components that require preventive mainte- MAINTENANCE nance. 360B MM...
  • Page 392 *If 360YTC Installed **If 360PSG Installed PANEL .5V/GHz IN, YIG CONTROL, +15V RELAY AND ACM INTERFACE IEEE-488 STD GPIB, 10 MHz CONNECTORS AND LINE MODULE IN CONNECTORS (See Figure 2) ASSEMBLY (See Figure 2) Figure B-3. Parts Locations 360B MM...

  • Page 393: Troubleshooting Procedures

    5V ± 0.3Vdc. If voltage is OK, K1 is defective. Step 8. If line voltage is present, check that fuses F1–F4 are not open (that is, no voltage drop across each fuse). If the fuses 360B MM...
  • Page 394 5,15 RTN Noise Figure Module Only. 12V P.S. ASSEMBLY +OUT LINE MODULE ASSEMBLY -OUT +OUT LINE VOLTAGE -OUT SELECT 15V P.S. ASSEMBLY FUSE ASSEMBLY** CHASSIS GND DUPLEX OUTLET ASSEMBLY **See Figure B-1 CHASSIS POWER TRANSFORMER Figure B-4. Interconnection Diagram 360B MM...

  • Page 395: Specifications

    100/120/220/240V, 60/50 Hz, 190 VA max With 360PSG or 360YTC: 100/120/220/240V, 60/50 Hz, 540 VA max Dimensions: 133H x 432W x 603D mm (5.25H x 17W x 23.75D in.) Weight (W/O Approx 10.9 kg (24 lb.) 360PSG or 360YTC): B-10 360B MM...
  • Page 396 A18T/A19T Assembly Circuit Description 360B VNA System Block Diagram, 5-7 Model 361XA/362XA, 7-35 A19 Front Panel PCB Circuit Description 360B VNA System Configuration Using 363XA, A-4 360B VNA System Interconnections, 2-5 Model 360 VNA, 5-44 A1T, A2T, A3T PCB Circuit Description...
  • Page 397 Model 360 VNA, 5-26 A17T Reference Delay Mounting Bracket A9T Microcircuit Circuit Description Assembly, 7-35 Model 3635B/364XB, 9-18 A18T/A19T Bias Tees Assembly, 7-35 Adjustment Procedures A1T, A2T, A3T Channel Amplifier PCB, 7-15, Model 360SSXX, 10-44 8-9, 9-9 Index 2 360B MM...
  • Page 398 Model 3635B/364XB, 9-3 Models 361XA/362XA, 3-23 Error Functional Overview Bias Tee Problems, 4-42 360ACM, B-6 Monitor Problems, 4-41 Step Attenuator Problems, 4-43 Error Message 009, 4-9 GPIB, 2-6, 5-4 010 or 170, 4-10 Graphics Control Processor, 5-5 360B MM Index 3...
  • Page 399 A5 PCB Frequency Adjustments, 10-46 A17T Assembly Circuit Description, 7-35 A6–A9 PCB Circuit Description, 10-26 A6–A9 YIG Oscillator Adjustments, 10-48 A18T/A19T Assembly Circuit Description, 7-35 Adjustment Procedures, 10-44 A20T/A21T/A22T Assembly Circuit Description, ALC Loop Adjustments, 10-60 7-36 Index 4 360B MM...
  • Page 400 A12T Power Amplifier (Test Set), 6-19 Using the 363XA Antenna Switch Drivers, A-5 A14T/A15T Coupler Connectors (Test Set), 6-23 Module Exchange Program, 1-5 A16T Power Divider (Test Set), 6-21 Monitor Problems, 4-41 A17T Interface Assy (Test Set), 6-20 360B MM Index 5...
  • Page 401 Frequency Doubler (Signal Source), 10-81 PIN Switch (Signal Source), 10-78 Test Set, 6-9 YIG Oscillator (Signal Source), 10-74 T1512 360B Test Fixture, 1-11 Remove and Replace YIG Oscillator Test Equipment, 1-11, 3-3, 4-3 Model 360SSXX, 10-74 Test Fixture (T1512), 1-11...
  • Page 402 A20 PCB Circuit Description, 5-46 Assembly Locations, 5-6 Description, 2-6, 5-4 Graphics Control Processor, 5-5 Human Interface Processor (Main #2), 5-5 I/O Processor, 5-5 Remove and Replace Color Display VGA Assembly, 5-52 Remove and Replace Covers, 5-49 360B MM Index 7/Index 8...

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