R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Instrument Functions
MARKER
DEMOD
MKR DEMOD
(ON OFF)
Analyzer Mode
The threshold line (MKR->:SEARCH LIMITS:THRESHOLD) performs a squelch
function in the demodulator. If the threshold is set, the R&S FSQ LF demodulation is
switched on only when the signal to be demodulated exceeds the set threshold.
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.
Remote command: CALC:MARK1:FUNC:DEM ON
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.
Remote command: CALC:MARK1:FUNC:DEM ON
AM | FM The softkeys AM and FM are selector switches one of which only may be active at a
time. They set the desired demodulation mode FM or AM. Default setting is AM.
Remote command: CALC:MARK1:FUNC:DEM:SEL AM
CALC:MARK1:FUNC:DEM:SEL FM
SQUELCH The SQUELCH softkey enables the input of a level threshold below which the audible
AF is cut off. The squelch function is associated with the internal trigger function
(TRIGGER menu), which will be switched on automatically with the squelch.
Squelch level and trigger level do have the same value.
MKR STOP
TIME
MKR DEMOD (ON OFF)
AM | FM
SQUELCH
MKR STOP TIME
CONT DEMOD
The default setting for the squelch is off.
Remote command: CALC:MARK1:FUNC:DEM:SQU ON | OFF
CALC:MARK1:FUNC:DEM:SQU:LEV 80 PCT
The MKR STOP TIME softkey defines the stop time for demodulation at the
marker(s).
The R&S FSQ interrupts the frequency sweep at the marker position and activates
the demodulation for the duration of the stop time (see also MKR DEMOD ON/OFF).
In the time domain (span = 0) the demodulation is continuously active irrespective of
the stop time set.
Remote command: CALC:MARK1:FUNC:DEM:HOLD 3s
Operating Manual 1313.9681.12 - 01 4.71