Trying to test Filter using NCO Megafunction and Signal Tap Analyzer?

clock is the actual physical clock you use to run your logic. sampling rate is the rate of a given data stream.

depending on your fortunes, the clock may be equal, less than or more than data rate. if clock is faster you may process more than one channel of data (if applicable). if your clock is lower you will need to split up your channel into say even/odd and process them accordingly, in this case there will be design dependency of even/odd...