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If the analyzer exhibits large amplitude errors (> 10 dB) especially at frequencies
o
above 10 GHz, the RF preselector might not be properly centered. Press Peak
Search, AMPTD Y-Scale, Presel Center. If the signal amplitude error is
corrected, the preselector characterization should be performed. Press System,
Alignments, More 1 of 2, Advanced, Characterize Preselector. The
characterization will take several minutes and the analyzer must not be
interrupted during this time. If the analyzer is interrupted during the
characterization process, the characterization data will be destroyed and it will be
necessary to perform the entire process again.
Is the analyzer displaying an error message? If so, refer to the Instrument
o
Messages Guide.
Check if the external frequency reference is selected but not available. Verify that
o
it is selected by pressing Input/Output, Freq Ref In. If External is selected,
changing the setting to Sense allows the analyzer to sense the presence of an
external reference and use it only if it is available. The frequency of the reference
should be set correctly.
If you are using a Windows program other than the instrument application, you
o
may notice it running slow. Place the instrument application in single
sweep/measurement.
Troubleshooting
Check the Basics
71
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