Selecting the Frequency and Span – FREQ Key R&S FSL
1300.2519.12 4.10 E-11
Frequency Offset
Opens an edit dialog box to enter a frequency offset that shifts the displayed frequency range by
the specified offset. The allowed values range from –100 GHz to 100 GHz. The default setting is
0 Hz.
Remote: FREQ:OFFS 10 MHz
Signal Track (span > 0)
Opens a submenu to modify the parameters for signal tracking: search bandwidth, threshold
value and trace.
The search bandwidth and the threshold value are shown in the diagram by two vertical lines
and one horizontal line, which are labeled as TRK. After each sweep the center frequency is set
to the maximum signal found within the searched bandwidth. If no maximum signal above the
set threshold value is found in the searched bandwidth, the track mechanism stops.
Remote: CALC:MARK:FUNC:STR OFF
Track On/Off (span > 0)
Switches the signal tracking on or off.
Remote: CALC:MARK:FUNC:STR OFF
Track BW (span > 0)
Opens an edit dialog box to set the search bandwidth for signal tracking. The frequency range is
calculated as a function of the center frequency.
Remote: CALC:MARK:FUNC:STR:BAND 1MHZ
Track Threshold (span > 0)
Opens an edit dialog box to set the threshold value for signal tracking.
Remote: CALC:MARK:FUNC:STR:THR –70DBM
Select Trace (span > 0)
Opens an edit dialog box to select the trace on which the signal is tracked.
Remote: CALC:MARK:FUNC:STR:TRAC 1