R&S ESCI Analyzer - MKR FCTN
1166.6004.12 4.135 E-1
AF Demodulation
The R&S ESCI provides demodulators for AM and FM signals. With these demodulators, a displayed
signal can be identified acoustically through the use of the internal loudspeaker or with headphones.
The frequency at which the demodulation is enabled is coupled to the markers. The sweep stops at the
frequency determined by the active marker for the selected time and the RF signal is demodulated.
During a measurement in the time domain (span = 0 Hz) the demodulation is continuously on.
The threshold line (MKR->SEARCH LIMITS:THRESHOLD) performs a squelch function in the
demodulator. If the threshold is set, the R&S ESCI LF demodulation is switched on only when the signal
to be demodulated exceeds the set threshold.
Menu MKR FCTN:
MARKER
DEMOD
AM
MARKER
DEMOD
OFF
MKR DEMOD
ON OFF
FM
MKR
STOP TIME
CONT
DEMOD
The MARKER DEMOD softkey switches on the audio demodulator
and calls a submenu in which the demodulation mode and the
duration of the demodulation can be selected.
IEC/IEEE-bus command: CALC:MARK1:FUNC:DEM ON
MKR DEMOD
ON OFF
The MKR DEMOD ON/OFF softkey switches the demodulation
on/off.
In the frequency range (span >0), the frequency scan is stopped at
the frequency of the active marker with demodulation switched on –
provided that the level is above the threshold line - and the signal is
demodulated during the given stop time.
In the time domain (span = 0) demodulation is continuous, i.e. not
only active at the marker position.
IEC/IEEE-bus command: CALC:MARK1:FUNC:DEM ON
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