Time v Time Heatmap (Trace Data)
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Time vs. Time is a measurement based on the concept of Fast-Time Slow-Time dimensions commonly associated with radar based signals. Slow time typically refers to the (y) axis of slower sampling rate, which ideally is the time between pulses. Fast time typically refers to the (x) axis of faster sampling rate (the sampling rate of the acquisition). Fast-time length is a user-entered value (MeasSetup > Time vs. Time > Fast-Time Length), and slow-time length is determined by the capture length of the measurement.
In a heatmap, each scan’s y-axis values (usually amplitude) are mapped to colors in a color map. The Time v Time Heatmap trace gives users the ability to look at the time domain of the data in a "heatmap" fashion, such that the scan length is as close to the Pulse PRI as possible. This allows for detecting any deviations from the intended pulse train with the given PRI.
The Time v Time Heatmap and Freq v Time Heatmap traces process and draw a single acquisition worth of data. Every acquisition brings in new data that is drawn, and the old data is disposed.
See Also
About Time vs. Time Measurements
