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Troubleshooting
Troubleshooting Using Diagnostic Test
Troubleshooting Using Diagnostic Test
The Keysight E5072A has an diagnostic test function to diagnose the analog
measurement section and internal DC power supply voltages. The diagnostic
test makes it possible to isolate a faulty board assembly. The following
paragraphs describe the procedure to perform the diagnostic test.
Power On Self Test
Power-on self-test always takes place once the E5072A is turned on. When a
failure is detected, a message "Power on self test failed" is displayed. The
content of the power-on self-test is the same as a part of the diagnostic test
program and includes the DC power supply voltage, source PLL synthesizer
and level controller (ALC) tests. When the self-test failed, perform the
diagnostic test to break down into the individual tests and narrow down failure
possibilities.
The following procedure can be used to restart the power-on self test as
required.
a. Press
b. Click Service Menu and, then, Test Menu in the softkeys.
c. Click Power On Test to restart the test. Wait until the power-on test
d. The test result (OK or Failed) is displayed in the Power On Test key.
PLL unlock
When a PLL of the frequency synthesizers is unlocked, not the "Power on self
test failed" but "Phase lock loop unlocked" message is displayed. If it occurs,
A91 Synthesizer Module may be faulty.
Contents of the diagnostic test
The diagnostic test contains 8 test groups shown in
can be performed independently and verifies one of various operating
characteristics of the analog measurement section.
Table 1-1
1
2
3
4
5
22
key.
ends.
Diagnostic test group menu
DC-BUS Test
Internal Level Monitor Test
RF Output Level Range Test
RF Output Level Power Sweep Test
Receiver Absolute Measurement Test
Table
1-1. Each test group
Keysight E5072A Network Analyzer
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Table of Contents
Troubleshooting
