Agilent Technologies E5061B, Руководство по обслуживанию

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30 Chapter 2
Troubleshooting
Troubleshooting Using Diagnostic Test
Troubleshooting Using Diagnostic Test
The Agilent 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.
NOTE 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.
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.
Table 2-1 Diagnostic test group menu
1 DC-BUS Test
2 Internal Level Monitor Test
3 RF Output Level Range Test
4 RF Output Level Power Sweep Test
5 Receiver Absolute Measurement Test
6 Receiver Compression Test (Option 3L5)
7 Receiver IF Ranging Test