HP 8590 E-Series, Calibration Manual

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11. Residual FM, HP 8593EM , HP 8594EM , HP 8595EM , and HP 8596EM
11. Residual FM,
HP 8593EM , HP 8594EM , HP 8595EM , and
HP 8596EM
This performance verication test must be performed with the EMC analyzer set
in the spectrum analyzer mode.
This test measures the inherent short-term instability of the EMC analyzer
LO system. With the analyzer in zero span, a stable signal is applied to the
input and slope-detected on the linear portion of the IF bandwidth lter skirt.
Any instability in the LO transfers to the IF signal in the mixing process . The
test determines the slope of the IF lter in hertz per decibel (Hz/dB) and then
measures the signal amplitude variation caused by the residual FM. Multiplying
these two values yields the residual FM in hertz. The narrow bandwidth
test uses a 300 Hz span. This span is not specied, however , it is tested in
\Frequency Span A ccuracy ."
There are no related adjustment procedures for this performance test.
Equipment Required
Signal generator
Cable , Type N, 183 cm (72 in)
A dditional Equipment for Option 026
A dapter , APC 3.5 (f) to Type N (f)
Procedure
This performance verication test consists of two parts:
P art 1: Residual FM
P art 2: Narrow Bandwidth Residual FM
P erformance V erication T ests 2-51