Test results showing the THD of a BK Precision 4017A with and without filter. The result is a reduction in THD of almost 40db at 1KC.
UAF CONFIGURED AS A LOWPASS LOW Q FILTER
UAF CONFIGURED AS BANDPASS HIGH Q FILTER
UAF CONFIGURED AS A HIGHPASS LOW Q FILTER
NOTCH FILTER SET AT 1.1KCS WITH A 50DB NOTCH
+