Record Length

NI High-Speed Digitizers Help (NI-SCOPE)

Edition Date: January 2017

Part Number: 370592AB-01

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NI-SCOPE (English | Japanese)

Record length refers to the number of samples, or data points, the digitizer acquires for each channel in a single acquisition.

To determine record length, call the niScope Actual Record Length VI or the niScope_ActualRecordLength function. You can also obtain the record length using the Actual Record Length property or the NISCOPE_ATTR_HORZ_RECORD_LENGTH attribute.

Maximum Duration

Record length limits the maximum duration of a single-shot acquisition. For example, with a 1,000-sample record and a sample rate of 20 MS/s, the duration of acquisition is 50 µs (the number of points multiplied by the acquisition time per sample, or 1,000 x 50 ns. With a 100,000-sample record and a sample rate of 20 MS/s, the duration of the acquisition is 5 ms (100,000 x 50 ns).

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