Ronde & Schwarz 1304.0004.03, User Manual

Page: 378 / 1076

The Spectrum Application (RF Measurements)
R&S
®
FPL1000
378 User Manual 1178.3370.02 ─ 09
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:DEModulation[:STATe]
on page 888
Continuous Demodulation
If activated, the signal is demodulated continuously and sent to the audio output,
instead of stopping the sweep at the marker frequency of marker 1 and demodulating
there for the configured marker stop time. This allows you to monitor the frequency
range acoustically (assuming the sweep time is long enough).
For zero span, demodulation is always active continuously.
In FFT mode, "Continuous Demodulation" is not available. The sweep always stops at
the frequency of marker 1.
For EMI measurements, demodulation is always performed during the final measure-
ment, and only the detected peak marker positions are demodulated (for the defined
dwell time), regardless of the "Continuous Demodulation" setting.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:DEModulation:CONTinuous
on page 887
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.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:DEModulation:HOLDoff
on page 887
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 888
Loudspeaker
If enabled, the demodulated audio signal is output to the IF/VIDEO connector (on the
rear panel of the R&S
FPL1000).
This connector is only available if the R&S FPL1-B5 option is installed.
Note that output to the [Phones] connector on the front panel is always possible,
regardless of the "Loudspeaker" state.
Remote command:
SYSTem:SPEaker[:STATe]
on page 810
Audio Output Volume
Sets the volume of the built-in loudspeaker for demodulated signals. This setting is
used for all applications.
The setting is available in the time domain in Spectrum mode and in Analog Demodu-
lation mode.
This connector is only available if the R&S FPL1-B5 option is installed.
Marker Usage