Common Measurement Settings
R&S
®
FSMR3000
155
User Manual 1179.0116.02 ─ 02
"Current Focus" dynamically switches to the currently selected window. Thus you can
easily change the output signal simply by selecting the windows in the display. If a win-
dow is selected that does not contain a time-domain result display, the selection is
ignored and the previous setting is maintained.
The result display currently used for output is indicated by a "Demod Out" label in the
window title bar.
Remote command:
OUTPut<up>:ADEMod[:ONLine]:SOURce
AF Coupling
Controls the automatic correction of the frequency offset and phase offset of the input
signal:
This function is only available for FM or PM time domain evaluations.
●
FM time evaluation
If DC is selected, the absolute frequency is displayed, i.e. an input signal with an
offset relative to the center frequency is not displayed symmetrically with respect to
the zero line.
If AC is selected, the frequency offset is automatically corrected, i.e. the trace is
always symmetric with respect to the zero line.
●
PM time evaluation
If DC is selected, the phase runs according to the existing frequency offset. In addi-
tion, the DC signal contains a phase offset of ± π.
If AC is selected, the frequency offset and phase offset are automatically corrected,
i.e. the trace is always symmetric with respect to the zero line.
Remote command:
AC Cutoff Frequency
Defines the cutoff frequency for the AC highpass filter (for AC coupling only, see
).
Note that the audio frequency (AF) filter settings used for demodulation also apply to
the online output.
Remote command:
OUTPut<up>:ADEMod[:ONLine]:AF[:CFRequency]
Phones Output
If enabled, the demodulated audio signal is output to the IF/VIDEO/DEMOD connector
(on the rear panel of the R&S
FSMR3000), as well as to headphones connected on the
front panel ([Phones] connector), if available.
CAUTION!
Risk of hearing damage. Before putting on the headphones, make sure that
the volume setting is not too high to protect your hearing.
Remote command:
OUTPut<up>:ADEMod[:ONLine]:PHONes
Output
