Agilent Technologies 53147A Manual de usuario

Agilent 53147A/148A/149A

Microwave Frequency Counter/

Power Meter/DVM

Assembly Level Service

Guide

This guide describes how to service the Agilent 53147A, 53148A, and

53149A. The information in this guide applies to instruments having the

number prefix listed below, unless accompanied by a “Manual Updating

Changes” package indicating otherwise.

SERIAL PREFIX NUMBER: US4047 (53147A)

US4048 (53148A)

US4049 (53149A)

Agilent Technologies, Inc. 7.C.NL.03.22.01.R1.M.CW6FC

5301 Stevens Creek Boulevard

Santa Clara, California 95052-8059

Copyright Agilent

Technologies, Inc. 2001, 2002

Reproduction, adaptation, or

translations without prior

written permission is

prohibited, except as allowed

under the copyright laws.

Printed: May 2002

Printed in U.S.A.

Manual part number

53147-90010

Certification and Warranty

Certification

Agilent Technologies, Inc.

certifies that this product met

its published specification at the

time of shipment from the

factory. Agilent further certifies

that its calibration measurements

are traceable to the United

States National Institute of

Standards and Technology

(formerly National Bureau of

Standards), to the extent

allowed by the Institute’s

calibration facility, and to the

calibration facilities of other

International Standards

Organization members.

Warranty

Agilent warrants Agilent

hardware, accessories and

supplies against defects in

materials and workmanship for

a period of one year from date of

shipment. If Agilent receives

notice of such defects during the

warranty period, Agilent will, at

its option, either repair or

replace products which prove to

be defective. Replacement

products may be either new or

like-new.

Agilent warrants that

Agilent software will not fail to

execute its programming

instructions, for the period

specified above, due to defects in

material and workmanship

when properly installed and

used. If Agilent receives notice

of such defects during the

warranty period, Agilent will

replace software media which

does not execute its

programming instructions due

to such defects.

For detailed warranty

information, see back matter.

Safety Considerations

General

This product and related

documentation must be

reviewed for familiarization

with this safety markings and

instructions before operation.

Before Cleaning

Disconnect the product from

operating power before cleaning.

Warning Symbols That May

Be Used In This Book

Instruction manual symbol; the

product will be marked with

this symbol when it is necessary

for the user to refer to the

instruction manual.

Indicates hazardous voltages.

Indicates earth (ground)

terminal.

Indicates terminal is connected

to chassis when such connection

is not apparent.

Indicates Alternating current.

Indicates Direct current.

Safety Considerations

(cont’d)

WARNING

BODILY INJURY OR DEATH

MAY RESULT FROM

FAILURE TO HEED A

WARNING. DO NOT

PROCEED BEYOND A

WARNING UNTIL THE

INDICATED CONDITIONS

ARE FULLY UNDERSTOOD

AND MET.

CAUTION

Damage to equipment, or

incorrect measurement data,

may result from failure to

heed a caution. Do not

proceed beyond a CAUTION

until the indicated conditions

are fully understood and met.

Safety Earth Ground

An uninterruptible safety earth

ground must be maintained

from the mains power source to

the product’s ground circuitry.

WARNING

WHEN MEASURING POWER

LINE SIGNALS, BE

EXTREMELY CAREFUL AND

ALWAYS USE A

STEP-DOWN ISOLATION

TRANSFORMER WHICH

OUTPUT IS COMPATIBLE

WITH THE INPUT

MEASUREMENT

CAPABILITIES OF THIS

PRODUCT. THIS PRODUCT’S

FRONT AND REAR PANELS

ARE TYPICALLY AT EARTH

GROUND. THUS, NEVER TRY

TO MEASURE AC POWER

LINE SIGNALS WITHOUT AN

ISOLATION TRANSFORMER.

For additional safety and

acoustic noise information,

see back matter.

Contents

Assembly Level Service Guide iii

1 Performance Tests

Introduction 1-2

Operational Verification 1-2

Complete Performance Tests 1-3

Recommended Calibration Cycle 1-3

Test Record 1-3

Equipment Required 1-4

Operational Verification 1-6

Power-On Self Tests 1-6

10 MHz Test 1-8

Run Self Test 1-9

External Timebase Test 1-10

Power Meter Test 1-13

DVM Test 1-15

Complete Performance Tests 1-17

Test 1: Channel 1 Frequency Sensitivity 1-18

Test 1a: 10 Hz to 20 MHz Frequency Sensitivity 1-18

Test 1b: 50 MHz to 125 MHz Frequency Sensitivity 1-20

Test 2: Channel 2 Frequency Sensitivity 1-23

Test 2a: 50 MHz to 20 GHz Frequency Sensitivity 1-23

Test 2b: 22 GHz to 26.5 GHz Frequency Sensitivity 1-25

Test 2c: 30 GHz to 46 GHz Frequency Sensitivity 1-26

Test 3: Power Measurement 1-27

Power Measurement Accuracy Test 1-27

Test 4: Power Reference Oscillator Frequency 1-30

Power Reference Oscillator Frequency Test 1-30

Test 5: Power Meter Reference Level 1-32

Power Meter Reference Level: Method 1 1-32

Power Meter Reference Level: Method 2 1-34

Performance Test Record (Page 1 of 3) 1-39

Performance Test Record (Page 2 of 3) 1-40

Performance Test Record (Page 3 of 3) 1-41

Contents

iv Assembly Level Service Guide

2 Service

Introduction 2-2

Returning the Instrument to

Agilent Technologies for Service 2-3

Providing Repair Information 2-3

Packing the Instrument in the Original

Packaging Materials 2-4

Packing the Instrument in Commercially Available

Packaging Materials 2-4

Calibration Procedures 2-6

Equipment Required 2-6

10 MHz Timebase Calibration 2-7

Power Reference Oscillator Frequency Calibration 2-9

Power Reference Oscillator Level Adjustment 2-13

DVM Calibration 2-20

Pre-Troubleshooting Information 2-23

Safety Considerations 2-23

Recommended Test Equipment 2-24

Repair Considerations 2-24

Electrostatic Discharge 2-24

Surface Mount Repair 2-25

Disassembly and Reassembly Specifics 2-25

After Service Considerations 2-25

Product Safety Checks 2-25

Product Performance Checks 2-26

Assembly Identification and Location 2-26

Troubleshooting the Instrument 2-28

Power Supply Check 2-28

Adjusting the +5 VDC Output 2-29

Self-Test 2-30

Running the Self Test 2-30

Self Test Error Messages 2-31

Contents

Assembly Level Service Guide v

3 Replacing Assemblies

Introduction 3-2

Tools Required 3-3

Do This First 3-3

Removing the Bumpers 3-4

Removing the Handle 3-5

Removing the Bumper Retainers 3-6

Removing the Shroud 3-7

Removing the Front Panel Assembly 3-9

Removing the Rear Panel Assembly 3-11

Removing the Cooling Fan 3-14

Removing the Power Supply 3-15

4 Replaceable Parts

Introduction 4-2

Replaceable Parts 4-2

How To Order A Part 4-3

Contacting Agilent Technologies 4-4

Parts Identification 4-5

Reference Designations 4-5

Cabinet Parts and Hardware 4-5

Accessories and Miscellaneous Items 4-5

5 Backdating

Introduction 5-2

6 Specifications

Introduction 6-2

Measurement Specifications and Characteristics 6-3

A Rack Mounting the Instrument A-2

Index

Contents

vi Assembly Level Service Guide

Assembly Level Service Guide vii

In This Guide

This guide provides assembly-level service information for the

Agilent 53147A, 53148A, and 53149A.

How to Use This Guide

Repair Strategy

This service guide is designed to isolate failures to the assembly-level only.

The Agilent 53147A/148A/149A instruments can be returned to Agilent for

all service work, including troubleshooting, and verifying specifications.

Contact your nearest Agilent Sales and Service Office for more details.

NOTE ISD (Instrument Service Division) Emergency Response or Express

Calibration Service is available for Agilent customers in the USA.

If downtime is critical, you can receive your repaired instrument via

overnight shipment. Call 800-403-0801, and ask for Emergency Response

or Express Calibration Service. When your instrument is repaired, it is

returned via overnight shipment at no extra charge.

If you decide to service the instrument yourself, use the troubleshooting

procedures in Chapter 2 (Service) and the disassembly and reassembly

procedures in Chapter 3 (Replacing Assemblies). Then use the calibration

instructions in Chapter 2 to calibrate the instrument for peak-

performance operation, and finally, perform all of the performance tests in

Chapter 1 to verify that the instrument is operating to the specifications.

In This Guide

viii Assembly Level Service Guide

Instrument Identification

The instrument is identified by the serial number on the rear panel.

Agilent uses a two-part serial number with the first part (prefix)

identifying a series of instruments and the second part (suffix) identifying

a particular instrument within a series. Agilent-assigned alpha characters

before the suffix identify the country in which the instrument was

manufactured.

Instruments Covered by this Guide

This guide applies directly to Agilent 53147A, 53148A, and 53149A

instruments that have the same serial number prefix(es) shown on the

title page. If the serial number prefix of your instrument differs from that

listed on the title page of this guide, there may be differences between this

guide and your instrument.

Instruments having a higher serial prefix are covered (when required) by

one or more manual-change sheets included with this guide. If a required

change sheet is missing, contact your nearest Agilent Sales Office listed at

the back of this guide.

Assembly-Level Service Guide Organization

This Assembly-Level Service Guide consists of a table of contents,

a preface, six chapters, and an index. The page headers identify the

chapters and sections of this manual. The chapter contents are

summarized as follows:

Chapter 1 Performance Tests provides procedures that verify the

instrument operates properly and meets the Agilent 53147A/148A/149A

specifications given in Chapter 6, “Specifications,” in this guide.

Chapter 2 Service is divided into seven main sections that provide

instructions for returning the instrument to Agilent for service,

calibrating the instrument, and troubleshooting the assemblies in

the instrument.

Chapter 3 Replacing Assemblies provides procedures for replacing

defective assemblies and/or modules in the instrument.

In This Guide

Assembly Level Service Guide ix

Chapter 4 Replaceable Parts lists the replaceable parts contained in

the instrument, and explains how to order replacement parts for your

instrument.

Chapter 5 Backdating contains information required to adapt this

manual for older instruments (to be provided when required).

Chapter 6 Specifications lists all the specifications and operating

characteristics for the Agilent 53147A/148A/149A.

How to Order Guides

The part number for this guide is listed on the Certification and Warranty

page (on the back of the title page) and on the back cover of this guide.

In This Guide

x Assembly Level Service Guide

Description of the Microwave Frequency

Counter/Power Meter/DVM

The Agilent 53147A, 53148A, and 53149A are capable of measuring

frequencies from 10 Hz to 125 MHz on Channel 1 and from 50 MHz to

20 GHz (53147A), 26.5 GHz (53148A), and 46 GHz (53149A) on Channel 2.

These instruments are also capable of measuring power (the power and

frequency ranges for power measurement are dependent on the power-

sensor model used) and DC voltages up to ±50 VDC. All three instruments

have a maximum frequency resolution of 1 Hz.

The Agilent 53147A, 53148A, and 53149A provide GPIB and RS-232 serial

interfaces and are suitable for field, bench-top, and ATE operation.

The basic measurement functions of the Agilent 53147A/148A/149A

include Frequency, Relative Frequency, Frequency Offset, and Power

(including Power Offset and Relative Power). All of these features are

accessible from the front panel and over the GPIB and RS-232 interfaces.

The Agilent 53147A/148A/149A includes the following additional

measurement functions and features that are designed specifically for

manufacturing and service applications:

•1, 2, 5, and 10 MHz external reference capability

•Optional high-stability oven oscillator for high-accuracy needs and

lengthened calibration cycles

•Frequency and power offset capabilities for relative measurements

•SCPI programming capability

•Battery and dc input option for operation in locations where ac

power is unavailable

•Optional soft carrying case for safe transportation and mobile use

Programmable control is performed via a GPIB or an RS-232 serial

interface. The GPIB and RS-232C ports are standard for the Agilent

53147A, 53148A, and 53149A.

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