Common Analysis and Display Functions
R&S
®
FSW
458User Manual 1173.9411.02 ─ 19
7.3.1.6 Working with Spectrograms
In addition to the standard "level versus frequency" or "level versus time" traces, the
R&S FSW also provides a spectrogram display of the measured data.
A spectrogram shows how the spectral density of a signal varies over time. The x-axis
shows the frequency, the y-axis shows the time. A third dimension, the power level, is
indicated by different colors. Thus you can see how the strength of the signal varies
over time for different frequencies.
Example: Spectrogram for the calibration signal
In this example you see the spectrogram for the calibration signal of the R&S FSW,
compared to the standard spectrum display. Since the signal does not change over
time, the color of the frequency levels does not change over time, i.e. vertically. The
legend above the spectrogram display describes the power levels the colors represent.
Result display
The spectrogram result can consist of the following elements:
Trace Configuration
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