ANRITSU MS4782A, MS4782D Schematic

MODEL

MS4782A/MS4782D

TEST SET FOR

POWER AMPLIFIER TEST SYSTEM

MAINTENANCE MANUAL

490 JARVIS DRIVE l MORGANHILL,CA95037-2809

P/N: 10410-00238

REVISION: A

PRINTED: JANUARY 2001

WARRANTY

The ANRITSU product(s) listed on the title page is (are) warranted against defects in materials and workmanship for three years from the date of shipment. ANRITSU’s obligation covers repairing or replacing products which prove to be defective during the warranty period. Buyers shall prepay transportation charges for equipment returned to ANRITSU for warranty repairs. Obligation is limited to the original purchaser. ANRITSU is not liable for con sequential damages.

LIMITATION OF WARRANTY

The foregoing warranty does not apply to ANRITSU connectors that have failed dueto normal wear. Also, the warranty does not apply to defects resulting from improper or inadequate maintenance by the Buyer, unauthorized modification or misuse, or operation outside of the environmental specifications of the product. No other warranty is expressed or implied, and the remedies provided herein are the Buyer’s sole and exclusive remedies.

TRADEMARK ACKNOWLEDGEMENTS

V Connector and K Connector are registered trademarks of ANRITSU Company. ANACAT is a registered trademark of EEsof, Inc. Ink Jet and Think Jet are registered trademarks of Hewlett-Packard Co. MS-DOS is a registered trademark of Microsoft Corporation.

NOTICE

ANRITSU Company has prepared this manual for use by ANRITSU Company personnel and cus tomers as a guide for the proper installation, operation and maintenance of ANRITSU Company equipment and computer programs. The drawings, specifications, and information contained herein are the property of ANRITSU Company, and any unauthorized use or disclosure of these drawings, specifications, and information is prohibited; they shall not be reproduced, copied, or used in whole or in part as the basis for manufacture or sale of the equipment or software programs without the prior written consent of ANRITSU Company.

Table of Contents, Narrative

Chapter 1 — General Service Information

This chapter provides a general description of the Model MS4782X Test Set for the ME7840A Power Amplifier Test System. It explains the level of maintenance covered in this manual and the service strategy used throughout this manual. It also contains static-sensitive component handling precau tions and a list of recommended test equipment.

Chapter 2 — Replaceable Parts

This chapter lists all replaceable subassemblies and components for the MS4782A and MS4782D models. It explains the ANRITSU exchange assembly program and provides parts ordering informa tion.

Chapter 3 — Performance Verification Procedures

This chapter provides detailed procedures for verifying that the performance of the MS4782X meets minimum performance standards.

Chapter 4 — Troubleshooting

This chapter provides information for troubleshooting the MS4782X Test Set. The troubleshooting procedures contained in this chapter support fault isolation down to a replaceable subassembly.

Chapter 5 — Removal and Replacement Procedures

This chapter describes how to gain access to all of the major assemblies and major parts for troubleshooting and/or replacement.

Appendix A — Connector Maintenance Check Procedures

This appendix contains procedures and information needed to perform maintenance checks (includ ing pin-depth measurements) for the connectors on all ANRITSU supplied Calibration/Verification Kit components, Through-cables, and other associated RF/microwave components.

Index

MS4782X MM i/ii

Chapter 1 General Information

Table of Contents

1-1 SCOPE OF MANUAL .......................1-3

1-2 INTRODUCTION .........................1-3

1-3 IDENTIFICATION NUMBER ..................1-3

1-4 ONLINE MANUAL ........................1-3

1-5 SYSTEM DESCRIPTION .....................1-4

1-6 RELATED MANUALS ......................1-4

1-7 STANDARD OPTIONS ......................1-4

1-8 SERVICE STRATEGY.......................1-5

Functional Assembly Level Troubleshooting ···········1-5 Internal Hardware Adjustments and Calibrations········1-5 Internal Service Log ························1-5 System Test/Certification ·····················1-6 Preventive Service ·························1-6 Servicing Specially Modified Instruments ············1-6

1-9 SERVICE SUPPORT .......................1-6

Technical Support ·························1-7 Field Service Kits ·························1-7 Service Software ··························1-7 Verification Kits ··························1-8 Test Fixtures/ Aids·························1-8

Failed Assembly Exchange Program ···············1-8

1-10 PERFORMANCE SPECIFICATIONS ..............1-9

1-11 SERVICE CENTERS .......................1-9

1-12 STATIC SENSITIVE COMPONENT HANDLING

PROCEDURES ..........................1-9

1-13 RECOMMENDED TEST EQUIPMENT ·············1-9

Figure 1-1. Typical MS4782X Test Set

Chapter 1 General Information

1-1 SCOPE OF MANUAL This manual provides general service and preventive maintenance in

formation for the ANRITSU MS4782A and MS4782D Test Set for the ME7840A Power Amplifier Test System. It contains procedures for:

Testing the instrument for proper operation.

Verifying measurement accuracy and traceability to National In

stitute of Standards and Technology (NIST). Troubleshooting a failed instrument to the exchange subassem

bly level or the subsystem requiring adjustment. Locating and replacing failed parts.

Throughout this manual, the terms “MS4782X” and “Test Set” will be used interchangeably to refer to both Models of MS4782X Test Set, unless otherwise noted.

1-2 INTRODUCTION This chapter provides a general description of PowerAmplifier Test

System serial numbers, frequency ranges, and related manuals. It also includes service strategy, available service facilities, and static-sensitive component handling precautions, and a list of recommended test equip ment.

1-3 IDENTIFICATION

NUMBER

All ANRITSU instruments are assigned a six-digit ID number, such as “401001”. This number appears on a decal affixed to the rear panel. Please use this identification number during any correspondence with ANRITSU Customer Service about this instrument.

1-4 ONLINE MANUAL This manual is available on CD ROM as an Adobe Acrobat™ (*.pdf)

file. The file can be viewed using Acrobat Reader™, a free program that is also available on the CD ROM. This file is “linked” such that the viewer can choose a topic to view from the displayed “bookmark” list and “jump” to the manual page on which the topic resides. The text can also be word-searched. A copy of this CD ROM, part number 10920-00035, is provided free of charge with this manual.

1-5 PATS SYSTEM

OVERVIEW

The ANRITSU ME7840A Power Amplifier Test System (PATS) is in tended for the measurement and real-time graphical display of the fol lowing parameters of a power amplifier in the frequency range of 800 MHz to 2.4 GHz:

MS4782X MM 1-3

HARDWARE DESCRIPTION GENERAL INFORMATION

S-Parameters including Hot S

K Factor

Gain Compression and Phase Distortion

Intermodulation Distortion

Harmonics

Drain Current and Power Added Efficiency (PAE)

PATS is designed to facilitate alignment, tuning and pass/fail testing of the components, modules and subassemblies of a power amplifier as well as the completed amplifier.

1-6 HARDWARE

DESCRIPTION

The ME7840A hardware (below) consists of a MS462XC, Direct Re ceiver Access (DRA) Scorpion, a MS4782X Test Set, a customer sup

plied Personal Computer (PC), and an optional current probe. The MS462XC is available in two frequency ranges: 10 MHz to 3 GHz or 10 MHz to 6 GHz.

The Test Set is available in two configurations, as described in Table 1-1 The MS4782D is standard, and the MS4782A is Option 2. A block diagram of the PATS is shown in Figure 1-2 and the Option 2 system in Figure 1-1.

1-4 372XXC/373XXC MM

GENERAL INFORMATION HARDWARE DESCRIPTION

SOURCE 2 SOURCE 1

ACCESS

SCORPION

DIRECT RECEIVER

OPTIONAL EXTERNAL

PREAMPLIFIERS

ATTENUATORS 70dB, 10dB/step

RF3

COMBINER

STEP

RF1

REVERSE

FORWAR

TRANSFER SWITCH

GPIB

ANALOG IN

SYSTEM

CONTROLLER

(PC)

GPIB

RECEIVERS

EXT I/O

KKKN

KKN

RF2

CONTROL LINES

-30dB

LIMITER

POW

OPTIONAL

SPECTRUM

ANALYZER

POWER

METER

POWER SUPPLY

MS478A Test Set

OPTIONAL

MODULATION

SYNTHESIZER

OPTIONAL

EXTERNAL

PRE-AMP

HIGH

STEP

ATTENUATOR

-30dB

70dB, 10dB/step

-30dB

TERMINATION

AUT

CURRENT PROBE

Indicates coaxjumper in the as-shipped configuration

Figure 1-1. Overall Functional Block Diagram of the Option 2 Power Amplifier Test System (PATS) with MS4782A

Test Set

MS4782X MM 1-5

HARDWARE DESCRIPTION GENERAL INFORMATION

SOURCE 2 SOURCE 1

MS4782D Test Set

ACCESS

SCORPION

DIRECT RECEIVER

OPTIONAL

EXTERNAL

PREAMPLIFIERS

ATTENUATORS 70dB, 10dB/step

RF3

COMBINER

-30dB

STEP

RF1

REVERSE

FORWAR

TRANSFER SWITCH

GPIB

ANALOG IN

SYSTEM

CONTROLLER

(PC)

GPIB

RECEIVERS

EXT I/O

KKKN

LIMITER

STEP

ATTENUATOR

70dB, 10dB/step

KKN

RF2

-30dB

CONTROL LINES

EXTERNAL

100 W

TERMINATION

CIRCULATOR

OPTIONAL

SPECTRUM

ANALYZER

OPTIONAL

MODULATION

SYNTHESIZER

OPTIONAL

EXTERNAL

PRE-AMP

-30dB

AUT

POWER

METER

POWER SUPPLY

CURRENT PROBE

Indicates coaxjumper in the as-shipped configuration

Figure 1-2. Overall Functional Block Diagram of the Basic Power Amplifier Test System (PATS) with MS4782D Test

Set

1-6 MS4782X MM

GENERAL INFORMATION SYSTEM DESCRIPTION

Table 1-1. Test Set Configurations

Model

MS4782A 800 to 1000 50 Yes Internal MS4782D 800 to 2400

Notes:

1. This frequency range does not account for any restricting effects caused by use of external circulator.

2. This Max AUT power assumes a minimum isolation of 23 dB provided by external circulator(s). Two circulators may have to be used to provide the required isolation.

Frequency Range

(MHz)

(Note 1)

Max AUT Power Output

(Watts)

100 (Note 2)

Reverse Measurements

, Hot S22,S12Possible)

Yes External

Circulator

(at AUT Output Path)

1-7 SYSTEM DESCRIPTION Brief descriptions of the DRA Scorpion (MS462XC) and MS4782X

Test Set are given below.

DRA Scorpion The Scorpion Direct Receiver Access (DRA) version Vector Network

Measurement System (VNMS) (Figure 1-2) functions under control of the software residing in the PC through GPIB commands. The software supports tuning and alignment operations by generating real time graphic displays of the measured data on the PC screen.

Under software control, 3 sured and displayed. Also, the Upper and Lower Side Band (USB & LSB) components of the IMD products are measured and displayed separately.

rd,5th

and 7thorder IMD products can be mea-

The DRA Scorpion includes the following capabilities:

Two internal, independent RF sources. Each source has a range of –15 dBm to +10 dBm. A 0dB to 70dB step attenuator (10 dB / step) is provided for each source resulting in a Power Output range of –85 dBm to +10 dBm from each source.

Complete built-in capability for IMD measurements. A combiner is provided in the Test Set.

Internal Transfer Switch enabling S22and Hot S22measure

ments. The reflectometer set-up is provided in the Test Set.

Direct access to each of the four receiver channels (two reference channels and two test channels) for maximum flexibility in mea

suring forward and reverse S-parameters over a wide range of AUT output power. The Test Set provides incident and reflected signal separation.

MS4782X Test Set The Series MS4782X Test Set contains a Wilkinson type combiner

that combines the two RF signals from Ports 1 and 3 (RF1 & RF3) of the Scorpion. External preamplifiers can optionally be provided at the

MS4782X MM 1-7

SYSTEM DESCRIPTION GENERAL INFORMATION

combiner input to boost the input RF power to the amplifier-undertest (AUT). The combiner has power input rating of 30-Watts maxi mum when terminated with a VSWR of 1.2:1. For an open or short at the combiner output, the combiner input power rating is 0.5 Watts maximum.

The output of the combiner is fed to a source selection switch that en ables one of the following to be applied to the AUT:

The combined signal from the Scorpion sources.

A modulated signal from an optional external modulation synthe

sizer.

A provision for the insertion of an optional external pre-amplifier (af

ter the combiner and source selection switch) is also provided. Refer to Chapter 7, “Preamplifier Operations,” for details.

The test set includes a bi-directional coupler at the input of the AUT that separates the incident signal from the reflected signal. The power rating of this bi-directional coupler is 100 watts average. The –30 dB portion of the incident and reflected signals are applied to the Scorpion reference port a ment. The S

measurement determined by the DRA Scorpion is sim-

and test port b1, respectively, for S11measure-

ply the ratio of the reflected signal to the incident signal. The amplified output of the AUT is fed to a high power coupler in the

test set. The power rating of this coupler is also 100-watts average. The –30 dB coupled arm of this coupler is routed to the test port b

the Scorpion througha6dBresistive divider and a 0-dB to 70-dB step attenuator (10dB/step). A limiter is also provided in this path provide added protection for the Scorpion reference channel .

The divider enables the connections of a power meter or Spectrum An alyzer, when desired, to measure the AUT b

output.

The through arm of the 100-W coupler is routed to a high power (100-Watt) termination through a circulator. In the MS4782A Test Set, the circulator is internal and has a rating of 100 watts average. This circulator has an isolation specification of 20-dB minimum. This means that the AUT output power is attenuated by 20 dB (plus other losses) before reaching the Scorpion port 2. Since the maximum (no-damage) power level for this port is 27 dBm (0.5 watt), this estab

lishes the maximum AUT output power at 50 watts. In the MS4782D Test Set, the circulator is external as shown in Fig

ure 1-2. In selecting an external circulator, the following criteria should be used.

1-8 MS4782X MM

GENERAL INFORMATION SYSTEM DESCRIPTION

Power rating: Should be no less than the power output of the am

plifier-under-test (AUT). It should be noted that a 100 watt ter mination is provided in the Test Set for the termination port of the external circulator.

Bandwidth: Should be sufficiently wide to cover the frequency

band of the AUT. Isolation: Should be no less than (Po-27 dB), where Pois the

power output in dBm of the AUT. Thus for Po = 47 dBm (50 watts), a 20 dB isolation is required. For a P

greater than 47

dBm up to 50 dBm (100 watts), two circulators in series can be used.

Where S

or Hot S22measurements are not required, power amplifiers

with up to 100 watts average output power can be tested with the MS4782D Test Set without any circulator by connecting the through arm of the output coupler directly to the 100 watt termination (Port C1 connected to Port C2 on the rear. The unit is shipped from the fac tory with this loop jumper.)

For S

measurements, the transfer switch located within the Scorpion

routes the source 1 output signal to the output port of the AUT via Port 2 (RF2) of the Scorpion. A separate 100-watt coupler in the test set applies the –30 dB portion of this incident signal to the Scorpion reference port a AUT output port is applied to the Scorpion test port b

. The –30 dB portion of the signal reflected from the

by means of the

AUT output coupler.

The PATS calibration is performed with the test set in place, at the connectors where AUT will be connected directly. Therefore, the test set components and cables are included in the calibration loop and their effects are calibrated out, resulting in correct and accurate mea surements of the AUT.

The software supplied by ANRITSU supports operator control of the source selection switch and step attenuator in the test set. This control is achieved through the parallel TTL control lines available at the Scorpion rear panel “External I/O” connector. The GPIB commands from the PC to the Scorpion set the TTL control lines to the desired states.

Connectors and Ports On the front panel of the Model MS4622/3C DRA Scorpion three Type

N (female) connectors are provided for Ports 1, 2 and 3. Port 1 provides RF source 1 when the transfer switch is in the forward

position, and is terminated in 50 ohms to ground when the transfer switch is in the reverse position.

MS4782X MM 1-9

SERVICE CENTERS GENERAL INFORMATION

Port 2 provides RF source 1 when the transfer switch is in the reverse position, and is terminated in 50 ohms to ground when the transfer switch is in the forward position.

Port 3 is allocated to RF source 2. Under independent control, port 3 provides RF source 2, or is terminated in 50 ohms to ground.

On the rear of the unit, four SMA connectors (Figure 1-) are provided for Reference ports a unit as well as all other mechanical specifications is the same as the model MS4623B.

On the MS4782D Test Set, three additional SMA connectors provide for connecting an external circulator. If reverse measurements (S Hot S through line should be connected between connectors C1 and C2 (Fig ure 1-). The MS4782A is shipped from the factory with this through line in place.

) are not desired, then a circulator is not required. Instead, a

and a2and Test Ports b1and b2. The front of the

and

1-8 SERVICE CENTERS ANRITSU Company offers a full range of repair and calibration services

at fully staffed and equipped service centers throughout the world. Table 2-1, located on page 2-2, lists all ANRITSU services centers.

1-9 STATIC SENSITIVE

COMPONENT HANDLING PROCEDURES

1-10 RECOMMENDED TEST

EQUIPMENT

The Test Set contains components that can be damaged by static electricity. Figure 1-2 illustrates the precautions that should be followed when handling static-sensitive subassemblies and components. If followed, these precautions will minimize the possibilities of static-shock damage to these items.

Table 1-2 lists the recommended test equipment to be used for all mainte nance activities for the MS4782X models. Note the “Use” codes listed in the right hand column of the table. These codes list the applicable maintenance activities for the equipment listed.

1-10 MS4782X MM

GENERAL INFORMATION RECOMMENDED TEST EQUIPMENT

Table 1-2. Recommended Test Equipment

INSTRUMENT

Power Meter ANRITSU ML2437A or MS2438A Power Sensor ANRITSU MA2472A GPIB Cable IEEE 488-2 compliant ANRITSU 2100-2, or equivalent Offset Termination SC5237 6 dB Return Loss

SC5270 20 dB Return Loss Termination Return Loss 35 dB, DC to 3 GHz ANRITSU 28L50LF Power Divider ANRITSU 11N50B Adapter ANRITSU 34NN50A Adapter ANRITSU 34NFNF50

Thru Line ANRITSU 3670NN50-2 or

Thru Line Phase stable

Length: 4 feet (2 each) Calibration Kit ANRITSU 3653 or 3753LF

** USE CODES:

A Adjustment / Internal Hardware Calibration O Operational Testing P Performance Verification T Troubleshooting

CRITICAL

SPECIFICATION

ANRITSU SC5237 ANRITSU SC5270

ANRITSU 34SFSF50 ANRITSU 34NKF50

15NN50-0.6B GORE PhaseFlex

Part number EJD01D010480

RECOMMENDED

MANUFACTURER/MODEL

USE*

P P P P

P P

O, T

P,O

MS4782X MM 1-11

STATIC HANDLING GENERAL INFORMATION

Do not touch exposed contacts on

any static sensitive component.

Wear a static-discharge wristband

when working with static sensitive components.

Do not slide static sensitive compo

nent across any surface.

Label all static sensitive devices.

Do not handle static sensitive com

ponents in areas where the floor or work surface covering is capable of generating a static charge.

Keep component leads shorted to-

gether whenever possible.

Handle PCBs only by their edges.

Do not handle by the edge connec tors.

Lift & handle solid state devices by

their bodies – never by their leads.

Transport and store PCBs and

other static sensitive devices in static-shielded containers.

10. ADDITIONAL PRECAUTIONS:

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 Sensitive Component Handling Procedures

1-12 MS4782X MM

Chapter 2 Replaceable Parts

Table of Contents

2-1 INTRODUCTION .........................2-3

2-2 EXCHANGE ASSEMBLY PROGRAM ..............2-3

2-3 REPLACEABLE SUBASSEMBLIES AND PARTS .......2-3

2-4 PARTS ORDERING INFORMATION ..............2-4

Table 2-1. Anritsu Service Centers

UNITED STATES

ANRITSU COMPANY 490 Jarvis Drive Morgan Hill, CA 95037-2809 Telephone: (408) 776-8300 1-800-ANRITSU FAX: 408-776-1744

ANRITSU COMPANY 10 New Maple Ave., Unit 305 Pine Brook, NJ 07058 Telephone: (201) 227-8999, 1-800-ANRITSU FAX: 201-575-0092

ANRITSU COMPANY 1155 E. Collins Blvd Richardson, TX 75081 Telephone: 1-800-ANRITSU FAX: 972-671-1877

AUSTRALIA

ANRITSU PTY. LTD. Unit 3, 170 Foster Road Mt Waverley, VIC 3149 Australia Telephone: 03-9558-8177 FAX: 03-9558-8255

BRAZIL

ANRITSU ELECTRONICA LTDA. Praia de Botafogo, 440, Sala 2401 CEP22250-040, Rio de Janeiro, RJ, Brasil Telephone: 021-527-6922 FAX: 021-53-71-456

CANADA

ANRITSU INSTRUMENTS LTD. 215 Stafford Road, Unit 102 Nepean, Ontario K2H 9C1 Telephone: (613) 828-4090 FAX: (613) 828-5400

FRANCE

ANRITSU S.A 9 Avenue du Quebec Zone de Courtaboeuf 91951 Les Ulis Cedex Telephone: 016-09-21-550 FAX: 016-44-61-065

GERMANY

ANRITSU GmbH Grafenberger Allee 54-56 D-40237 Dusseldorf, Germany Telephone: 0211-968550 FAX: 0211-9685555

INDIA

MEERA AGENCIES (P) LTD. A-23 Hauz Khas New Delhi 110 016 Telephone: 011-685-3959 FAX: 011-685-2275

ISRAEL

TECH-CENT, LTD. 4 Raul Valenberg St Tel-Aviv 69719 Telephone: (03) 64-78-563 FAX: (03) 64-78-334

ITALY

ANRITSU Sp.A Roma Office Via E. Vittorini, 129 00144 Roma EUR Telephone: (06) 50-99-711 FAX: (06) 50-22-4252

KOREA

ANRITSU CORPORATION LTD. 14F, Hyunjuk Bldg 832-41 Yeoksam-Dong Kangnam-Ku Seoul South Korea 150 010 Telephone: 02-553-6603 FAX: 02-553-6604, 02-553-6605

JAPAN

ANRITSU CUSTOMER SERVICE LTD. 1800 Onna Atsugi-shi Kanagawa-Prf. 243 Japan Telephone: 0462-96-6688 FAX: 0462-25-8379

SINGAPORE

ANRITSU (SINGAPORE) PTE LTD. 6 New Industrial Road #06-01/02 Hoe Huat Industrial Bldg Singapore 536199 Telephone: 282-2400 FAX: 282-2533

SOUTH AFRICA

ETECSA 12 Surrey Square Office Park 330 Surrey Avenue Ferndale, Randburt, 2194 South Africa Telephone: 011-27-11-787-7200 FAX: 011-27-11-787-0446

SWEDEN

ANRITSU AB Botivid Center Fittja Backe 1-3 S145 84 Stockholmn Telephone: (08) 534-707-00 FAX: (08) 534-707-30

TAIWAN

ANRITSU CO., LTD. 6F, No. 96, Section 3 Chien Kuo N. Road Taipei, Taiwan, R.O.C. Telephone: (02) 515-6050 FAX: (02) 509-5519

UNITED KINGDOM

ANRITSU LTD. 200 Capability Green Luton, Bedfordshire LU1 3LU, England Telephone: 015-82-4332003 FAX: 015-82-731303

Chapter 2 Replaceable Parts

2-1 INTRODUCTION This chapter provides replaceable parts information for both MS4782X

models. The major replaceable Test Set assemblies and parts are listed in Table 2-2 . The locations of these assemblies/parts are shown in Figure 2-1.

2-2 EXCHANGE ASSEMBLY

PROGRAM

ANRITSU maintains a module exchange program for selected subassem blies. If a malfunction occurs in one of these subassemblies, the defective item can be exchanged. Upon receiving your request, ANRITSU will ship the exchange subassembly to you, typically within 24 hours. You then have 45 days in which to return the defective item. All exchange subassemblies or RF assemblies are warranted for 90 days from the date of shipment, or for the balance of the original equipment warranty, whichever is longer.

NOTE

When sending a failed assembly to the factory for exchange, a copy of the Service Log must always accompany the failed assembly. This copy may be a printout, or a saved disk copy. Due to the importance of the service log information to the ANRITSU factory Service Engineers, the exchange prices are only valid if the service log data is included with the failed assembly.

Please have the exact model number and serial number of your unit available when requesting this service, as the information about your unit is filed according to the instrument’s model and serial number. For more information about the program, contact your local sales rep resentative or call ANRITSU Customer Service direct (refer to para graph 2-4.

2-3 REPLACEABLE

SUBASSEMBLIES AND PARTS

Table 2-2 lists the major replaceable subassemblies and parts for the MS4782X. These assemblies/parts are presently covered by the ANRITSU exchange assembly program.

MS4782X MM 2-3

PARTS ORDERING INFORMATION REPLACEABLE PARTS

Table 2-2. Replaceable Subassemblies

Part Number Description Where used

1000-50 A7 Circulator, 800 to 1000 MHz, 50W MS4782A internal, MS4782D external 1000-52 A7 Circulator, 1.8 to 2.5 GHz, 50W MS4782D external 1000-53 A7 Circulator, 1.8 to 2.5 GHz, 79W MS4782D external 1015-51 A8 High Power Termination MS4782A and MS4782D ND55507 A10 SPDT Switch Assembly MS4782A and MS4782D 1091-305 A4 Combiner MS4782A and MS4782D 1091-307 A1 Coupler MS4782A and MS4782D 1091-307 A2 Coupler MS4782A and MS4782D 1091-307 A3 Coupler MS4782A and MS4782D 1091-308 Dual Coupler MS4782A and MS4782D 1K50A A5A2 RF Limiter MS4782A and MS4782D 339H40998A A5 Step Attenuator MS4782A and MS4782D 40-133 A6 Power Supply MS4782A and MS4782D 43045-3 A9 System Control PCB Assy MS4782A and MS4782D K240B A5A1Power Divider MS4782A and MS4782D ND55508 Fan Assembly MS4782A and MS4782D

2-4 PARTS ORDERING

INFORMATION

All parts listed in Table 2-2 may be ordered from your local ANRITSU service center (Table 2-1, page 2-2). Or, they may be ordered directly from the factory at the following address:

ANRITSU Company ATTN: Customer Service 490 Jarvis Drive Morgan Hill, CA 95037-2809

Telephone: (408)-778-2000 FAX: (408)-778-0239

2-4 MS4782X MM

REPLACEABLE PARTS PARTS ORDERING INFORMATION

A6 Power Supply

A10 SPDT Switch

A8 High Power Termination

7 Circulator

(MS4782A only)

A9 Control PCB Assembly

A3 Coupler

A5A2 Limiter

A5A2

A5 Step Attenuato

A5A1 Power Divider

A10

A2 Coupler

A4 Combiner

A1 Coupler

Figure 2-1. Major Assemblies Location Diagram (Top View)

MS4782X MM 2-5/2-6

Chapter 3 Performance Verification Procedure

Table of Contents

3-1 INTRODUCTION .........................3-3

3-2 CONVENTIONS..........................3-3

3-3 TEST EQUIPMENT .......................3-3

3-4 SOURCE OUTPUT ACCURACY .................3-5

3-5 RETURN LOSS CONFIDENCE TEST ..............3-6

Test Procedure: ··························3-7

3-6 SYSTEM DYNAMIC RANGE ..................3-9

3-7 RECEIVER DISPLAY LINEARITY ..............3-11

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