6Af Demodulation - Rohde & Schwarz R&S FSP Series Operating Manual

R&S FSP
LEFT LIMIT | The LEFT LIMIT and RIGHT LIMIT softkeys define the vertical lines F1/F2 in the fre-
RIGHT LIMIT quency domain (span > 0) and T1/T2 in the time domain (span = 0) between which
the search is carried out.
If only one line is active, the F1/T1 line is used as the lower limit; the upper limit is
the stop frequency. If F2/T2 is also active, it defines the upper limit.
Remote command:
THRESHOLD The THRESHOLD softkey defines a horizontal threshold line which represents the
lower limit of the peak search level range.
Remote command:
PEAK LIST OFF The PEAK LIST OFF softkey switches off the table with the search results.
Remote command:
PEAK LIST The PEAK LIST EXPORT softkey stores the content of the marker peak list in ASCII
EXPORT format to the specified file. The format of the decimal point is defined by the DECIM
SEP softkey.
Remote command:
DECIM SEP The DECIM SEP softkey selects the decimal separator between '.' (decimal point)
and ',' (comma) for the function PEAK LIST EXPORT.
With the selection of the decimal separator different language versions of evaluation
programs (e.g. Microsoft Excel) can be supported.
Remote command:
4.5.11.6 AF Demodulation
The R&S FSP provides demodulators for AM and FM signals. The demodulators for
AM and FM signals are only available if the instrument is equipped with the AF
demodulator option (R&S FSP-B3). With these demodulators, a displayed signal
can be identified acoustically through the use of the internal loudspeaker or with
headphones. The frequency at which the demodulation is enabled is coupled to the
markers. The sweep stops at the frequency determined by the active marker for the
selected time and the RF signal is demodulated. During a measurement in the time
domain (span = 0 Hz) the demodulation is continuously on.
The threshold line (MKR->:SEARCH LIMITS:THRESHOLD) performs a squelch
function in the demodulator. If the threshold is set, the R&S FSP LF demodulation is
switched on only when the signal to be demodulated exceeds the set threshold.
MARKER
MKR DEMOD (ON OFF)
DEMOD
AM | FM
SQUELCH
MKR STOP TIME
CONT DEMOD
4.66
CALC:MARK:X:SLIM:LEFT 1MHZ
CALC:MARK:X:SLIM:RIGH 10MHZ
CALC:MARK:X:SLIM ON
CALC:THR -20dBm
CALC:THR ON
--
MMEM:STOR:PEAK 'C:\filename.txt'
FORM:DEXP:DSEP POIN
Operating Manual 1164.4556.12 - 06
Instrument Functions
Analyzer Mode