Pll Unlock; External Reference Signal Phase Unlock (Opt. 1E5); Contents Of The Diagnostics Test - Keysight E5071C ENA Service Manual

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.
With Firmware 9.26 or later, Power On Test result is recorded as
"PowerOnTest_NNNN.txt" in Log folder under E:\Log\PowerOnTest.

Contents of the diagnostics test

The diagnostics test contains 7 test groups shown in
group can be performed independently and verifies one of various operating
characteristics of the analog measurement section.
Table 4-4 Diagnostic test group menu
Number
1
2
3
4
5
6
Keysight E5071C ENA Network Analyzers
Test Name
DCBUS TEST
INTERNAL LEVEL MONITOR TEST
RF OUTPUT LEVEL POWER SEEP
RF OUTPUT LEVEL RANGE TEST
RECEIVER ABSOLUTE MEASUREMENT TEST
RECEIVER COMPRESSION TEST
Table 4-4. Each test
79