Tektronix RSA6100A Series, Руководство пользователя

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General Signal Viewing > Spectrogram Time & Freq Scale Tab
Setting Description
Vertical (Time)
Normal For most Spectrogram applications. Primary time scale control is Time/div. Time scale
can be zoomed in or out.
Spectrum Monitor For long-term signal monitoring applications. In spectrum monitor mode, each line in the
spectrogram represents the period of time speci
fi ed by the Time/update parameter. Time
scale can be zoomed out, but not zoomed in (no overlap).
Time/update Sets the time, in minutes and seconds, represented by each line of the spectrogram.
Only available in Spectrum Monitor.
Reset Scale Resets the Time/div and Pos settings to their default values.
Autoscale Scales the vertical (time) axis to compress all existing trace lines into the visible area
of the graph. Resets the Position value to zero, placing the most recent spectrogram
line at the bottom of the spectrogram display. Only Position is affected by Autoscale
when Spectrum Monitor is selected.
Time/div Sets the time displayed per division.
Visible elapsed time Displays the length of time visible in the display. This does not represent the total time
available to view.
Position Adjusts vertical position of the trace within the graph area. Setting represents the offset,
in divisions, between the bottom of the graph and the bottom (most recent) line in the
results trace.
Time at position Displays the time of the spectrogram line shown at the bottom of the graph. This time is
relative to the Time Zero Reference of the current acquisition.
Horizontal (Frequency)
Scale
Sets the frequency range of the graph without changing the Span value.
Position Sets the frequency displayed at the center of the graph. Changing this value does not
change the Freq setting.
Autoscale Sets the frequency scale to the Spectrogram Span value.
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Spectrum Monitor
Spectrum Monitor performs long term monitoring. The monitor mode compresses time into each line
of the spectrogram, which enables you to monitor long periods of time (from 1 second per line up to
600 minutes per line). With extended memory (Option 02) installed in the instrument, you can capture up
to 125,000 lines. With standard memory installed in the instrument, the maximum number of lines you
can capture is 31,250.
During each line’s collection period, spectrum transforms are computed for each acquisition taken by the
instrument. As each transform completes, it is incorporated into the current spectrogram line. How each
RSA6100A Series Real-Time Spectrum Analyzers Help
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