Model
8901B
Operation
Special Function Cancellation
Performing Calibration cancels most special functions.
When Using the AM Calibrator to Calibrate Other Signal Analyzers
The modulation waveform
of
the AM Calibrator is a rounded squarewave.
An
RF
signal analyzer, which
uses it as a calibration standard, must have demodulation and audio-processing circuits which preserve
the full fidelity
of
the waveform.
Automatic AM Ranging
When used
to
calibrate an
RF
signal
analyzer, Special Functions
13.1
and
13.2
set the AM modulation
range
to
that
of
0
to
100%
(Special Function
2.1).
Upon exiting the AM Calibrator Special Function,
the audio ranging is not returned
to
automatic but remains fixed (thus leaving the SPCL light on).
Key in
2.0
SPCL
to
return the audio ranging
to
automatic.
AM Calibration
3-145
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