Buffer Depth (Spectrogram / 3D Map)

Buffer Depth specifies the maximum number of individual traces that will be stored in the Spectrogram trace buffer.

The spectrogram trace buffer is stored when the spectrogram is saved.

When the value for Buffer Depth is changed, the VSA empties the buffer and the current spectrogram is cleared.

The buffer depth is limited by the amount of memory available on your computer.

The trace buffer stores traces from the last N measurements sweeps (where N is the buffer depth) or, when fast averaging is on, from the last N average updates. Trace 1 is the oldest trace in the buffer. Trace N is the newest trace in the buffer.

The spectrogram can show more traces than stored in the buffer, but when the spectrogram is saved only the number of traces specified with Buffer Depth are saved. If the spectrogram is resized or rescaled, only the number of traces represented by Buffer Depth are shown.

Also, markers can only be set for traces in the buffer.

To fill the trace buffer with spectrogram data and show the spectrogram, select a trace, set 3D Map to Spectrogram or click the icon in the Spectrogram / 3D Map toolbar, and restart the measurement by clicking the Restart button .

With the Trace Select parameter, a specific trace in the trace buffer can be selected to use as a markers to show in other traces that contain the same Trace Data.