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

DEMOD
Demodulation
Turns the demodulator on or off, and selects between AM, FM, or quasi-peak demodulation,
Syntax
DEMOD
Equivalent Softkey: DEKOD ON OFF is similar.
Option Required: Option 102, 103, or 301.
Related Commands: DET, FMGAIN, HAVE, MKPAUSE, SP, SPEAKER, SQLCH.
Restrictions: Not available with Analog+ display mode. See “ANLGPLUS” for more
information.
Example
This example demonstrates FM demodulation in a span greater than zero.
10 OUTPUT 718;"IP;FA SOMHZ;" Sets start frequencjj.
20 OUTPUT 718;"FB 11OMHZ;" Sets stop frequency.
30 OUTPUT 718;"TS;MKPK HI;MKCF;" Places marker on the highest peak and brings the
peak to center frequency.
40 OUTPUT 718;"DEMOD 0N;DEMOD FM;" Turns on FM demodulation.
50 OUTPUT 718;"MKPAUSE 500MS;” Turn on marker pause. The detector switches
automatically to the FMV detector during the
dwell time.
60 END
Description
Execute “DEMOD ON;” to turn on the demodulator. “DEMOD AM;“, “DEMOD FM;“, or
“DEMOD QPD;” selects the demodulation mode, but does not turn on the demodulator.
For AM or FM demodulation in nonzero frequency spans, use MKPAUSE to set the dwell time of
the marker.
Quasi-peak demodulation (QPD) is available with Option 103. See the Option 103 Manual
Supplement for more information about operating the quasi-peak detector remotely.
5-l 28 Programming Commands