Keysight E5071C ENA Network Analyzers 79
Troubleshooting
Troubleshooting Using Diagnostics Test
Error message Ax-y (x = module, y = total port-1) functioning.
Example A2-4 not found,
x = 2, y = 4
--> 3 receiver modules are functioning.
Example A2-1 not found,
x = 2, y = 1
--> 0 receiver modules are functioning
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,
Synthesizer Module may be faulty.
External reference signal phase unlock (Opt. 1E5)
If the "ExtRef" in the instrument status bar is displayed in gray, not turning
blue, in using the high stability time base (Opt. 1E5), Crystal Oven board or the
interconnection cable between rear panel Ref Oven and Ref In connectors may
be faulty. Also check whether the "Ready" in the instrument status bar is
displayed in blue (the warm-up in the instrument is completed). If it is in gray,
wait until the "Ready" turns blue.
Contents of the diagnostics test
The diagnostics test contains 7 test groups shown in Table 4-4. Each test
group can be performed independently and verifies one of various operating
characteristics of the analog measurement section.
With Firmware 9.26 or later, Power On Test result is recorded as
“PowerOnTest_NNNN.txt” in Log folder under E:\Log\PowerOnTest.
Table 4-4 Diagnostic test group menu
Number Test Name
1DCBUS TEST
2 INTERNAL LEVEL MONITOR TEST
3 RF OUTPUT LEVEL POWER SEEP
4 RF OUTPUT LEVEL RANGE TEST
5 RECEIVER ABSOLUTE MEASUREMENT TEST
6 RECEIVER COMPRESSION TEST
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