Kenwood TS-990S In-Depth Manual page 43

DSP 06
● Band Elimination Filter (BEF)
The "band elimination filter" is an incomprehensible name. Read it as the name of a function to control the band and
attenuation of the manual notch filter. While the notch filter mainly impacts on beats, the band elimination filter is useful
to attenuate interfering signals even with slight attenuation to the desired signal when there is an interfering signal such
as that of audio over the desired signal.
Besides using the manual notch filter, the center frequency of the filter can be changed by rotating the [NOTCH] knob.
In the Band Elimination Filter screen, the stopband bandwidth can be changed in the range of 300 Hz to 1200 Hz in
steps of 100 Hz and the amount of attenuation at the center can be changed in the range of 20 dB to 80 dB in steps of
20 dB.
Fig. 65 Band Elimination Filter Characteristics (Reference)
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