R&S FSW Series, Руководство пользователя

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Common Analysis and Display Functions
R&S
®
FSW
547 User Manual 1173.9411.02 ─ 43
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:DEModulation[:STATe]
on page 1199
Continuous Demodulation
If activated, the signal is demodulated continuously (not only at the marker position)
and sent to the audio output. This allows you to monitor the frequency range acousti-
cally (assuming the sweep time is long enough).
For zero span and EMI measurements, demodulation is always active continuously.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:DEModulation:CONTinuous
on page 1198
Marker Stop Time
Defines how long the sweep is stopped at the marker position to output the demodula-
ted signal.
For zero span measurements, demodulation is always active continuously, regardless
of the marker stop time.
For EMI measurements, the duration of the demodulation at each marker position is
limited by the dwell time of the EMI measurement marker (see
"Dwell Time"
on page 348).
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:DEModulation:HOLDoff
on page 1198
Modulation
Defines the demodulation mode for output (AM/FM). The default setting is AM.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:DEModulation:SELect
on page 1198
Squelch
Activates or deactivates the squelch function. If activated, the audible AF is cut off
below a defined threshold level. Thus, you avoid hearing noise at the audio output
when no signal is available.
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.
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 command:
[SENSe:]DEMod:SQUelch[:STATe]
on page 1199
Squelch Level
Defines the level threshold below which the audible AF is cut off if squelching is
enabled. The video trigger level is set to the same value.
The squelch level is indicated by a red line in the diagram.
Marker Usage