How can I find the optimum frequency band for an unwanted noise signal?
Follow these simple steps: (1) select one of the two Filters, say Filter A; (2) set the GAIN switch to the Null position (this sets up a-20 dB attenuator); (3) rotate the FREQUENCY switch while looking at your UT instrument s display until the noise signal drops in amplitude (you are now close to its center frequency); (4) rotate the FREQUENCY knob a few steps on either side of this position until you find the largest drop in amplitude (you have now found the center frequency of the noise); (5) lastly, adjust the width of the band by rotating the BW switch through each of its three positions (Low, Mid, Wide) and select the BW position that gives the largest decrease in the noise signal. You will generally find the Wide BW setting works best for noise suppression. Congratulations, you have now found the optimum frequency band and bandwidth to suppress the noise signal.
