3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
Remote Command
[:SENSe]:DEMod AM | FM | PM | OFF
[:SENSe]:DEMod?
Example Turn amplitude demodulation function ON:
:DEM AM
Dependencies When Tune & Listen is ON, all active traces are forced to use the same detector
CISPR detectors (QPD, EMI Avg, RMS Avg) and Tune & Listen are mutually exclusive. No sound output
is heard if one of these detectors is selected
Preset
OFF
State Saved Saved in instrument state
Backwards
Compatibility SCPI
[:SENSe]:DEMod:STATe ON | 1 | OFF | 0
[:SENSe]:DEMod:STATe?
Backwards
Compatibility
Notes
Sending DEM:STAT ON has the same effect as sending DEM:AM, turning AM Demod ON
Sending DEM:STAT OFF has the same effect as sending DEM:OFF, turning Demod OFF
The query returns the state of the Analog Demod Tune and Listen function. The response to the query
is determined by the current setting of [:SENSE]:DEMod AM|FM|PM|OFF. The response is 1 if
AM, FM, PM are selected, or 0 if OFF is selected. In ESA, the command [:SENSe]:DEMod AM|FM
would select the demodulation type but would not activate it (turn it on). In X-Series this command
both selects and activates demodulation
The X-Series implementation of Demod Tune and Listen does not include Squelch Control as was
supported in ESA
The speaker control for Tune and Listen for X-Series is done with the volume up/down and mute
hardkeys in the System Settings dialog and is handled by the Windows operating system. There is no
software speaker on/off control as was supported in ESA
Demod Time
Sets the amount of time the instrument demodulates the signal after each sweep for
the Tune & Listen function. The demodulated signal can be heard through the
speaker during demodulation. In zero span, demodulation can be performed
continuously, making this parameter not applicable, hence it is grayed-out in zero
span.
Remote Command
[:SENSe]:DEMod:TIME <time>
[:SENSe]:DEMod:TIME?
Example
:DEM:TIME 500 ms
:DEM:TIME?
Notes Grayed-out in Zero Span
Dependencies Unavailable in Zero Span
Preset 500 ms
State Saved Saved in instrument state
Spectrum Analyzer Mode User's &Programmer's Reference 429
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