Filtering and Decimation

NI High-Speed Digitizers Help (NI-SCOPE)

Edition Date: January 2017

Part Number: 370592AB-01

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The filtering and decimation stage of the OSP block reduces the effective sample rate of the digitizer while protecting the frequency spectrum of the decimated data from aliases. This protection occurs when the data passes through a lowpass filter before decimation. The normal decimation in digitizers (when not using OSP) does not protect the frequency spectrum of the decimated data from aliases.

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