Chapter 7 335
General Troubleshooting
Error Messages
2. Press LINE to turn the spectrum analyzer on and
observe the lower right-hand corner of the display
for 10 seconds.
3. If ERR 581 or ERR 582 appears, the fault is most
likely caused by the cal oscillator. Refer to errors
581 and 582.
4. If ERR 581 or ERR 582 does not appear,
troubleshoot the A5 IF assembly.
Multiple IF errors during IF adjust: If a FULL IF ADJ
sequence (pressing
CAL and FULL IF ADJ) results in IF
errors while displaying IF ADJUST STATUS:
AMPLITUDE, the cal oscillator on the A4 assembly might
not be providing the correct output signal. Perform the
following steps:
1. Disconnect W30 (white) from A5J4.
2. Connect W30 to the input of a second spectrum
analyzer and set its controls as follows:
Center frequency........................... 10.7MHz
Reference level .............................. −30dBm
3. Observe the spectrum analyzer display while
pressing
FULL IF ADJ on the spectrum analyzer. If a
−35 dBm signal does not appear, troubleshoot the cal
oscillator on the A4 assembly.
4. If a −35 dBm signal does appear, troubleshoot the A5
IF assembly.
405 RBW 10K Unable to adjust 10 kHz resolution bandwidth in first
crystal pole.
406 RBW 10K Unable to adjust 10 kHz resolution bandwidth in
second crystal pole.
407 RBW 10K Unable to adjust 10 kHz resolution bandwidth in third
crystal pole.
408 RBW 10K Unable to adjust 10 kHz resolution bandwidth in fourth
crystal pole.
409 RBW 10K Unable to adjust 10 kHz resolution bandwidth in first
crystal pole.
410 RBW 10K Unable to adjust 10 kHz resolution bandwidth in
second crystal pole.
411 RBW 10K Unable to adjust 10 kHz resolution bandwidth in third
crystal pole.
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