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

10 Monitor Spectrum Measurement
Meas Setup

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 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
25 µs
Sets the De-emphasis time constant to 25µs.
Key Path
Example
Readback
Initial S/W Revision
50 µs
Sets the De-emphasis time constant to 50 µs.
Key Path
Example
806
Meas Setup, Analog Demod, FM
[:SENSe]:MONitor:DEMod:FM:DEEMphasis OFF | US25 | US50 | US75 | US750
[:SENSe]:MONitor:DEMod:FM:DEEMphasis?
MON:DEM:FM:DEEM US75
MON:DEM:FM:DEEM?
Only available in FM. Grayed out for AM and PM.
US75
Saved in instrument state
OFF|US25|US50|US75|US750
A.13.00
Meas Setup, Analog Demod Tune&Listen, FM, De-emphasis
MON:DEM:FM:DEEM OFF
Off
A.13.00
Meas Setup, Analog Demod Tune&Listen, FM, De-emphasis
MON:DEM:FM:DEEM US25
25 ∝s
A.13.00
Meas Setup, Analog Demod Tune&Listen, FM, De-emphasis
MON:DEM:FM:DEEM US50
EMI Receiver Mode Reference