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FFTPCTAMR FFT Percent Amplitude Modulation Readout
FFTPCTAMR
FFT Percent Amplitude Modulation Readout
Returns the percent of amplitude modulation (AM).
Syntax
FFTPCTAMR
XFFTPCTAMR
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:
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