The SDFM is configured to process the NC sampling based on the expected clock frequency (20 MHz). A mismatch between the actual clock frequency and the configured frequency can lead to inaccuracies in filtering. This happens because the firmware will read the accumulator output earlier or late than the expected time frame due to the difference in the actual clock value. You need to configure the ChannelX SDFM Clock in sysconfig equal to the actual clock frequency(19MHz). Thanks & Regards, Achala Ram
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