HP 8903B Service Manual

Agilent Technologres. Inc
24001
E Mission
Liberty take, WA 99019
www agilent corn
*.
. .':A:. . Ag i I en t Technologies
: . : . Innovating the HP Way
.*.e.*
June 8,2000
Dear Customer,
As of November 1, 1999, four of Hewlett-Packard's businesses, test and measurement,
semiconductor products, health care solutions, and chemical analysis became a new company,
Agilent Technologies. Now, many of your Hewlett-Packard products and services are in the care of
Agilent Technologies.
At Agilent Technologies, we are working diligently to make this transition as smooth as possible for
you. However, as a result of this transition, the products and related documentation contained in this
shipment may be labeled with either the Hewlett-Packard name and logo, the Agilent Technologies
name and logo, or a combination of both. Information in this package may refer to Hewlett-Packard
(HP), but applies to your Agilent Technologies product. Hewlett-Packard and Agilent branded
products with the same model number are interchangeable.
Whatever logo you see, the information, products, and services come from the same reliable source.
If you have questions about Agilent Technologies products and services, please visit our website at
http://www .anilent.com.
Sincerely,
Rebranding Team
08903-90062 Volume 1

HP 8903B Specifications

General

Frequency Range	20 Hz to 100 kHz
Input Impedance	100 kΩ
AC Voltage Measurement	300 μV to 300 V full scale
Modes	Distortion, SINAD
Signal-to-Noise Ratio	100 dB typical

Summary

Regulatory Information

Safety Considerations

General safety guidelines, earth ground requirements, and symbol definitions.

Safety Considerations for this Instrument

Specific safety warnings related to instrument operation and servicing.

REGIONAL SALES AND SERVICE OFFICES

UNITED STATES OF AMERICA

Contact information for Agilent Technologies sales and service in the USA.

Section 6 REPLACEABLE PARTS

6-7. ORDERING INFORMATION

Instructions on how to order parts, including required information.

6-8. RECOMMENDED SPARES LIST

Guidance on stocking spare parts for quick instrument return to service.

Section 7 INSTRUMENT CHANGES

7-3. FIRMWARE CHANGE SUMMARY

Explains firmware changes, ROM updates, and software date codes.

7-4. HARDWARE CHANGE SUMMARY

Notes on hardware changes like quasi-peak detector and output impedance selection.

Section 8 SERVICE

8-1. INTRODUCTION

Overview of troubleshooting, repair, block diagrams, and principles of operation.

8-6. SAFETY CONSIDERATIONS

General safety advice for instrument operation.

8-7. Before Applying Power

Verification steps before applying power, including line voltage and earth ground.

8-9. RECOMMENDED TEST EQUIPMENT AND ACCESSORIES

Lists required test equipment and accessories for maintaining the Audio Analyzer.

8-15.1 Component Replacement Procedures

Guidelines for replacing components on HAL printed circuit boards, including soldering.

8-16. GENERAL TROUBLESHOOTING

Strategy for troubleshooting based on operator errors, out-of-spec conditions, or failures.

8-20. SPECIAL FUNCTIONS

Extends user control beyond normal front-panel operations for users and technicians.

8-24. ERROR MESSAGES

Explains instrument error messages, categorizing them by error code.

8-27. POWER-UP CHECKS

Procedures for verifying instrument operation using internal TEST LEDs after power-up.

8-29. SIGNATURE ANALYSIS

Method for verifying digital circuitry operation using test routines and signatures.

8-30. SCHEMATIC SYMBOLOGY AND SCHEMATIC DIAGRAM NOTES

Summarizes symbology used in schematic diagrams for clarity and correlation.