Agilent Technologies 8560E User Manual page 668

If You Have a Problem
Spectrum Analyzer Problems
• Review the test procedure that was being used when the problem
• Are the measurements that are being performed and the expected
Table 9-1 Problems and Possible Causes
Symptoms
GPIB doesn't work
Doesn't plot/print
Can't find signal
Signal amplitude is
wrong
Amplitude dropouts
Hardware Problems
Some of the procedures in this chapter may clear hardware problems.
• Trace Alignment
• Reference Level Calibration
• Realigning the LO and IF
If the necessary test equipment is available, perform the verification
tests in the calibration guide. Record all results in the performance test
record.
If you have an Agilent 85629B Test and Adjustment Module, you can
use its automatic fault isolation routine to troubleshoot your Agilent
8560E/EC, Agilent 8561E/EC, or Agilent 8563E/EC. Refer to "Running
the Automatic Fault Isolation Routine" in this chapter.
If there is a hardware problem, you can repair it yourself or return the
analyzer to Agilent Technologies for repair. See "Returning Your
Spectrum Analyzer For Service" for more information.
668
occurred. Are all the settings correct?
results within the specifications and capabilities of the spectrum
analyzer? Refer to the calibration guide for specifications.
Things to Check
• Check that GPIB cable is connected and cable is good.
• Check that GPIB address is set correctly. (See "GPIB
Address Selection")
• Disconnect equipment from GPIB one instrument at a
time and retry.
Refer to "Plotting and Printing Directly".
• Check for the local oscillator signal at 0 Hz which
indicates that the hardware is probably good.
• Narrow the resolution bandwidth in case the signal is
being obscured.
• Refer to "Reference Level Calibration".
• Increase input attenuation, since the signal may be in
compression.
Mating a K connector with APC 3.5 results in moding near
32 GHz. Power holes exist at other frequencies when using
adapters and cables beyond their specified range.
Chapter 9