# AlazarFFTBackgroundSubtractionGetRecordS16¶

## Function Syntax¶

RETURN_CODE AlazarFFTBackgroundSubtractionGetRecordS16(dsp_module_handle dspHandle, S16 *backgroundRecord, U32 size_samples)

Reads the background subtraction record from a board.

This function can be called to read which record the board uses for the background subtraction feature. It is used by allocating an array of the right size, then passing it to backgroundRecord along with it’s size in samples to size_samples.

This function should be called before or between acquisitions, not during one.