HP 4395A - General Information; Introduction; Organization of Service Manual

1
General Information
INTRODUCTION
This Service Manual is a guide to servicing the HP 4395A Network/Spectrum/Impedance
Analyzer. This manual provides information about performance test, adjustment,
troubleshooting and repairing the analyzer.
ORGANIZATION OF SERVICE MANUAL
This manual consists of major chapters listed below. The chapters are divided by tabs. This
section describes the names of the tabs and the content of each chapter
.
Perfomance Test provides the procedures required for performance test of the analyzer
.
Calculation Sheet provides a calculation sheet for those perfomance tests that require
additional calculation to determine the nal test results.
Performance Test Record provides a performance test record. The record sheets provides for
all test items.
Adjustments provides procedures for adjusting the analyzer after repair or replacement of
an assembly. Some of the adjustments updates correction constants stored into the Flash
ROM on the A1 CPU board. The correction constants is updated by using the adjustment
program (PN 04395-18004).
Note
The next four, four chapters are the core troubleshooting chapters.
Troubleshooting. The troubleshooting strategy is to systematically verify portions of the
analyzer, and thus narrow down the cause of a problem to the defective assembly. This
chapter is the rst of a series of troubleshooting procedures
. It checks the operation of the
analyzer independent of system peripherals, and suggests how to remedy system problems.
Power Supply Troubleshooting
Digital Control Troubleshooting
Accessories Troubleshooting
Each of the ve functional group chapters above veries its constituent assemblies until
the faulty assembly is identied. Accessories Troubleshooting veries external RF cables
and calibration kit devices. Accessories Troubleshooting is the last of the gray-tabbed
troubleshooting chapters.
General Information 1-1