R&S FSW Series, Руководство пользователя

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Common Analysis and Display Functions
R&S
®
FSW
546 User Manual 1173.9411.02 ─ 43
audio output. Thus, a displayed signal can be identified acoustically with the help of the
internal loudspeaker or with headphones.
This function is not available for Spectrum Emission Mask measurements or measure-
ments on I/Q-based data.
The sweep stops at the frequency determined by marker 1 for the selected time and
the RF signal is demodulated in a bandwidth that corresponds to the RBW. Alterna-
tively, demodulation can be activated continuously, i.e. audio output occurs regardless
of the marker position and the marker stop time. For measurements in the time domain
(zero span), demodulation is always continuous.
Optionally, a minimum level ("Squelch Level") can be defined so that the signal is only
demodulated when it exceeds the set level. This is useful during continuous demodula-
tion to avoid listening to noise.
The squelch function activates the video trigger function (see "Video" on page 483) and
deactivates any other trigger or gating settings. The squelch level and trigger level are
set to the same value. The trigger source in the channel bar is indicated as "SQL" for
squelch. The squelch level is indicated by a red line in the diagram.
Remote commands:
Chapter 14.8.3.15, "Programming Examples for Using Markers and Marker Functions" ,
on page 1200
Marker Demodulation State ........................................................................................ 546
Continuous Demodulation ...........................................................................................547
Marker Stop Time ........................................................................................................547
Modulation ...................................................................................................................547
Squelch ....................................................................................................................... 547
Squelch Level ..............................................................................................................547
Marker Demodulation State
Activates or deactivates the demodulation output.
Marker Usage