Tektronix RSA6100A Series, Help Manual

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General Signal Viewing > DPX Spectrum Traces Tab – Bitmap
Traces tab settings for the bitmap trace (Standard and Option 200)
Setting Description
Trace drop-down list Select Bitmap to set the parameters of the DPX Spectrum Bitmap trace.
Show Speci fi es whether or not the selected trace is displayed.
Intensity (standard instrument
only) Use Intensity to control the visibility of events. An increased intensity level allows a
single, short event to be seen. This also makes such an event subject to the persistence
controls. This allows you to see the effect of the Persistence controls on infrequent
events. Range is 1-100%. Resolution: 1.
Dot Persistence Allows a dot to remain visible if it is not updated with new data. Choices for this setting
are Variable and In
fi nite.
Variable The Variable dot persistence setting controls how long a point in the display is visible
before fading. This setting has no units associated with it.
Standard instrument Range: 1–1000. Resolution 0.1.
Option 200 instrument Range: 50 ms–100 s.
In fi nite The In fi nite dot persistence setting prevents a point in the display from fading.
Freeze Halts updates to the selected trace.
Save Trace As... Saves the selected trace to a fi le for later recall and analysis.
Show Recalled Trace Displays a saved trace instead of a live trace.
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Dot Persistence
Dot Persistence is the characteristic of the DPX Spectrum display that determines how long a pixel in
the display remains visible.
To set the Persistence:
1. Select Setup > Settings .
2. Select the Traces tab.
3. Select Dot Persistence .
4. Select either In fi nite or Variable .
5. If you select Variable, enter a value in the text box. The Variable persistence value can be set from 1 to
1000 in the base instrument, and from 0.05 to 100 seconds with Option 200.
Saving Traces
To save a trace for later analysis:
1. Select the Save Trace As button. This displays the Save As dialog box.
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RSA6100A Series Real-Time Spectrum Analyzers Help