2000 Hz Sampling Frequency

Note the effect of the AC coupling filter on the signal.  (Blue is an unfiltered sweep from 100 mHz to 500 Hz, with a varying offset of 0, 1, or 2; Red is the filtered result)

 

Note the magnitude response of the filter @2000Hz sampling frequency. 

 

A zoomed in section of the magnitude response at the lower cutoff corner.