A notch filter is just the opposite of a band-pass filter. A band-pass filter would pass a certain range of frequencies (all the frequencies inside the band), while it would cut out all the others. A notch filter cuts out a certain band of frequencies (all the frequencies inside the notch) and passes everything else.
jperkin2 said:A notch filter is just the opposite of a band-pass filter. A band-pass filter would pass a certain range of frequencies (all the frequencies inside the band), while it would cut out all the others. A notch filter cuts out a certain band of frequencies (all the frequencies inside the notch) and passes everything else.
I see, do you happen to know which frequencies BG is cutting out with the notch filter they are using in the RD40?
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