HP 8590 E & L Series Spectrum Analyzers and HP 8591C Cable TV ...

FFTPCTAMR FFT Percent Amplitude Modulation Readout
FFTPCTAMR
FFT Percent Amplitude Modulation Readout
Returns the percent of amplitude modulation (AM).
Syntax
FFTPCTAMR
Prerequisite Commands: FFTCONTS, FFTMKR, FFTSNGLS, FF”IAUT0, FFTPCTAM.
Related Commands: FFTPCTAM.
Example
OUTPUT 718;"FFTCONTS;" Starts the FFT
OUTPUT 718;"MOV FFTPCTAM,l;" Turns on the percent AMfunction.
OUTPUT 718;"FFTPCTAMR?;" Queries the percent AM reading.
ENTER 718;Percentam Gets the percent AM reading.
Description
FFTPCTAMR returns either a positive real number, a “0,” or a “-1” as follows:
XFFTPCTAMR
A real number If the a valid signal could be measured, FFTPCTAMR returns a real number
that represents the percent AM of the FFT signal (the percent AM is calculated
using only the largest single frequency of modulation).
0 If no modulation was detected, FFIPCTAMR returns a “0.”
-1 If the FFT input was above the top graticule (clipped), FFTPCTAMR returns a
U-1.”
Query Response
% AM
modulation
/ \
output
termination +
OFFTPCTAMR
Programming Commands 5-173