32 Keysight E5061B Network Analyzers
Troubleshooting
Troubleshooting Using Diagnostic Test
2-
Troubleshooting Using Diagnostic Test
The Keysight E5061B 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 E5061B 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.
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,
A1 Source Module may be faulty.
Contents of the diagnostic test
The diagnostic test contains 8 test groups shown in Table 2-1. Each test group
can be performed independently and verifies one of various operating
characteristics of the analog measurement section.
The following procedure can be used to restart the power-on self test as
required.
a. Press key.
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
ends.
d. The test result (OK or Failed) is displayed in the Power On Test key.
Table 2-1 Diagnostic test group menu
1 DC-BUS Test
2 Internal Level Monitor Test
3RF Output Level Range Test
4RF Output Level Power Sweep Test
5 Receiver Absolute Measurement Test
6 Receiver Compression Test (Option 3L5)
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