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Common analysis and display functions
R&S
®
FSVA3000/ R&S
®
FSV3000
550
User Manual 1178.8520.02 ─ 08
Squelch Level
Defines the level threshold below which the audible AF is cut off if squelching is
enabled. The video trigger level is set to the same value.
The squelch level is indicated by a red line in the diagram.
Remote command:
Loudspeaker
If enabled, the demodulated audio signal is output to the IF connector (on the rear
panel of the R&S
FSV/A).
This connector is only available if the R&S
FSV3-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:
7.3.4.8
Marker peak list
Access
: "Overview" > "Analysis" > "Marker Functions" > "Marker Peak List"
Or
: [MKR FUNC] > "Marker Peak List"
A common measurement task is to determine peak values, i.e. maximum or minimum
signal levels. The R&S
FSV/A provides various peak search functions and applica-
tions:
●
Setting a marker to a peak value once (Peak Search)
●
Searching for a peak value within a restricted search area (Search Limits)
●
Creating a "marker table" with all or a defined number of peak values for one
sweep ("Marker Peak List")
●
Updating the marker position to the current peak value automatically after each
sweep (Auto Peak Search)
●
Creating a fixed reference marker at the current peak value of a trace (Fixed Refer-
ence)
Peak search limits
The peak search can be restricted to a search area. The search area is defined by limit
lines which are also indicated in the diagram. In addition, a minimum value (threshold)
can be defined as a further search condition.
When is a peak a peak? - Peak excursion
During a peak search, noise values are detected as a peak if the signal is very flat or
does not contain many peaks. Therefore, you can define a relative threshold ("Peak
Excursion"). The signal level must increase by the threshold value before falling again
before a peak is detected. To avoid identifying noise peaks as maxima or minima, enter
a peak excursion value that is higher than the difference between the highest and the
lowest value measured for the displayed inherent noise.
Marker usage