Agilent Technologies E4445A Service Guide

180 Chapter 8
Hardware Options
Verifying Option 122 or 140, Wide Bandwidth Digitizer
Troubleshooting Table
Test
Condition
Test
Results
Assumptions Possible Problem Notes
IF Align signal
selected (Inner
loop test)
Good This means the A31 Wide band Analog IF circuits
from the point where the calibrator signal is
applied are OK. There are a few components on the
very front end on the board such as the input
connector that are not tested
The 300 MHz and 100 MHz reference signals from
the Reference assembly are correct.
The A32 Wideband Digital IF assembly is good
WB Align
signal selected
Bad The non-wideband signal path (narrow IF path)
functions correctly.
A10 Third Converter
(Outer loop
test)
The A31 Wideband Analog
IF input connector or cal
switch or A31 Cal Out
connector or cal switch is
faulty.
Cable W65 from the 3rd
Converter to the.A31 input
connector.
Cable W64 from the A31
Cal out port to the 3rd
Converter faulty.
IF Align signal
selected (Inner
loop test)
Bad The wideband IF Align
calibrator is faulty
WB Align
signal selected
(Outer loop
test)
Good
IF Align signal
selected (Inner
loop test)
Bad A31 Wideband Analog IF
assembly faulty
Continue with
next step in this
procedure
WB Align
signal selected
(Outer loop
test)
Bad A31 Wideband Analog IF
assembly faulty
Continue with
next step in this
procedure

Agilent Technologies E4445A Specifications

General

Brand	Agilent Technologies
Model	E4445A
Category	Measuring Instruments
Language	English