To set up a spectrogram display
This procedure shows you how to set up and view a spectrogram display.
1. Perform the procedure at the beginning of this chapter to create a test signal.
2. Turn on the spectrogram display for trace A.
Press [A] to activate trace A.
Press [Display][spectrogram setup][spectrogram on].
3. Set the size of the trace buffer.
Press [buffer depth]50[enter].
4.
Press [Meas Restart] to start a new spectrogram measurement.
Notice that you set up a spectrogram display in much the same way as a
waterfall display. Both displays share the same trace buffer. Therefore,
you may switch between waterfall and spectrogram displays without losing
data.
A spectrogram display is simply another method of looking at trace data.
In a spectrogram, the y-axis is reduced to a single line, where color
represents different y-axis values. Therefore, each trace occupies a single,
horizontal line on the display. Because of this, a single-grid spectrogram
display requires about 300 traces to fill the entire display.
A spectrogram uses a colorbar to represent the y-axis. The colorbar shows
how colors are distributed along the y-axis and the y-axis value of each
color.
The flow of trace data in a spectrogram display is opposite a waterfall
display. In a waterfall display, traces flow from the top to the bottom of
the display, with the most recent trace at the top. In a spectrogram
display, traces flow from the bottom to the top of the display, with the
most recent trace at the bottom.
For additional information, see online help for the [spectrogram setup] softkey.
Using Waterfall and Spectrogram Displays (Opt. AYB)
7 - 11
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