De-Emphasis (Fm Demod Only) - Keysight x-series User Reference Manual

9 Strip Chart Measurement
Meas Setup
FM
Pressing this key, when it is not selected, selects and activates the FM demodulation function. Pressing it a
second time branches to the FM Demod menu where FM demodulation settings can be adjusted.
Key Path
Example
State Saved
Initial S/W Revision

De-emphasis (FM Demod Only)

The De-emphasis setting controls a single-pole filter (6 dB/octave roll off), usually to counter intentional
pre-emphasis in the transmitter. When the De-emphasis state is OFF the hardware digital filter is
bypassed, otherwise the setting is applied.
Key Path
Remote Command
Example
Notes
Preset
State Saved
Range
Initial S/W Revision
Off
This setting bypasses the De-emphasis filter.
Key Path
Example
Readback
Initial S/W Revision
656
Meas Setup, Analog Demod Tune&Listen
SCH:DEM FM Turns FM demodulation function ON.
Saved in instrument state.
A.07.00
Meas Setup, Analog Demod, FM
[:SENSe]:SCHart:DEMod:FM:DEEMphasis OFF|US25|US50|US75|US750
[:SENSe]:SCHart:DEMod:FM:DEEMphasis?
SCH:DEM:FM:DEEM US75
SCH:DEM:FM:DEEM?
Only available in FM. Grayed out for AM and PM.
US75
Saved in instrument state.
OFF|US25|US50|US75|US750
A.07.00
Meas Setup, Analog Demod Tune&Listen, FM, De-emphasis
SCH:DEM:FM:DEEM OFF
Off
A.07.00
EMI Receiver Mode Reference