Fast-Time Length (Time vs. Time)

The Fast-Time Length specifies the length of time used to split the overall capture time domain data into slices. Each fast time interval may be thought of as a vector of samples that has many names, including range bins, range gates, range cells and fast time samples. In the Time vs. Time Heatmap, these data vector slices are stacked on top of each other to achieve a "heatmap" perspective that makes visualizing deviations in the pulse repetition intervals much easier. Aberrations in PRIs tend to stand out as movements in the heatmap with respect to slow-time.

When Auto is selected (default = selected), the Fast-Time Length is determined based on the input signal and the measurement frequency span. The Auto checkbox is not intended to provide the best possible Fast-Time Length, but a reasonable starting place for all types of hardware. To automatically detect the best possible Fast-Time Length, consider using the Detect PRI for Fast-Time button.