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Model 8902A
Operation
Special Function Cancellation
Performing Calibration cancels most special fiinctions.
When Using the AM Calibrator to Calibrate Other Signal Analyzers
The modiilation 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 modiilation
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.
3-171
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