Time Overview Display - Tektronix SPECMON3 Manual

General Signal Viewing
Case 3. In this case, the upper and lower limits of the Receiver BW fall within the upper and lower
limits of the acquisition bandwidth. This is the desired relationship between the three settings, and audio
demodulation is enabled.

Time Overview Display

The Time Overview display shows the entire acquisition record and shows you how the spectrum time and
analysis time fit within the acquisition record. This enables you to see how you can adjust the spectrum
time and analysis time to measure portions of the data.
You can specify the maximum number of trace points in the Time Overview display. You can set the
maximum number of trace points to 1K, 10K, 100K, 1M points or to Never decimate. If the Acquisition
Length includes more than 10,000 sample points (and Max trace points is not set to Never decimate), the
trace is decimated (using the +Peak method, similar to +Peak detection in a Spectrum display) to 10,000
points. This decimated trace is what is used for marker measurements.
The Time Overview window displays the Spectrum Length and Analysis Length. The Spectrum Length
is the period of time within the acquisition record over which the spectrum is calculated. The Analysis
Length is the period of time within the acquisition record over which all other measurements (such as
Amplitude vs. Time) are made. The Spectrum Length and Analysis Length can be locked together so
that the data used to produce the Spectrum display is also used for measurement displays; however, they
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Time Overview Display
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