Status displays
Status displays include the data panel at the top left of the screen, numeric readouts in chart channel panels, and device switching and alarm displays.   Updating these during acquisition requires some cpu and display time, so they should be turned off when you want to use very high sampling rates.

In practice, this has only a minor effect because the biggest constraint on sampling rate is the speed of the A-D converter, and how fast data can be transferred over the serial interface linking the converter to the computer.

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