76 Keysight E5071C ENA Network Analyzers
Troubleshooting
Troubleshooting Using Diagnostics Test
4-
Troubleshooting Using Diagnostics Test
The Keysight E5071C has the diagnostics test function to diagnose the analog
measurement section and internal dc power supply voltages. The diagnostics
test makes it possible to isolate a faulty board assembly without need of
external test equipment. The following paragraphs describe the procedure to
perform the diagnostics test.
Power On Self Test
Power-on self-test always takes place once after the E5071C is turned on.
When a failure is detected, a message of the "Power on self test failed" is
displayed. The content of the power-on self-test is the same as a portion of the
diagnostics test program and includes the dc power supply voltage, source
PLL synthesizer and level controller (ALC) tests. When the self-test failed,
perform the diagnostics 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 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 4-1 Power on Self Test Error Message
Error Message Meaning Error
Priority
Power on test failed
(A6 not found)
A6 Analog Base module is not found on Board ID
check
1
Power on test failed
(A6 DC-bus, 0x%08X)
DC-BUS Test on A6 Analog Base module failed 2
Power on test failed
(A1-1 not found)
No synthesizers are found on Board ID check 3
Power on test failed
(A1-1 DC-bus, 0x%08X)
DC-BUS Test on A1 Source Synthesizer failed 4
Power on test failed
(A1-2 not found)
A1 Source Synthesizer or A1 Local Synthesizer is
not found on Board ID check
5
Power on test failed
(A1-2 DC-bus, 0x%08X)
DC-BUS Test on A1 Local Synthesizer failed 6
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