Spectrogram Measurement (Option K14) R&S FSL
1300.2519.12 4.192 E-11
Spectrogram view
The Spectrogram view is divided into two panes: the spectrum analyzer result display (upper pane) and
the spectrogram result display (lower pane).
• spectrum analyzer result display
As in Spectrum Analyzer mode, all traces are displayed and available. For trace 1, the View and
Blank trace modes are not available.
During the measurement, always the current trace is displayed.
If no measurement is running, the trace to be displayed is selected via:
– the Select Frame softkey
– the edit dialog box for markers and delta markers (MKR key, Marker 1/2/3/4 softkeys or MKR–
> key, Select 1 2 3 4
softkey)
The selected trace is displayed with its corresponding, activated markers (D2 in the example). The
position of the markers activated for other traces is only displayed in the marker field (M1 in the
example).
• spectrogram result display
In a Cartesian diagram, the chronological power distribution (y–axis) over a frequency or time range
(x–axis) is displayed. The different levels are displayed in different colors.
Only the data of trace 1 is displayed in the spectrogram. The result display is build up by horizontal
lines so–called frames, each representing a trace. The frames are sorted in chronological order:
Starting from the current trace (frame 0) at the y–axis value zero, the last trace (frame –1), the trace
before the last trace (frame –2), and so on, are displayed with increasing y–axis value. The
maximum number of frames to be recorded is defined by the History Depth softkey.
A frame consists of a maximum of 501 measurement points. If more measured values than
measurement points are available (set via the Sweep Points softkey), several measured values are
combined in one measurement point using the selected detector (Auto Peak detector not available,
for details on detectors refer to "Detector overview" on page 4.42).
Fig. 4-22 Spectrogram (example)
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