This is driving me crazier! My narrow filter is 250hz (FL4). FL4 cuts in when I change my DSP filtering to 250 hz, as it should. FL4 stays in as I make DSP more narrow, all the way to 50 hz. The problem is that when I change DSP from 150hz to 100hz or to 50hz, my audio output seems to drop tremendously, to the point I have to increase the AF gain to hear the intended signal. The audio does not come back to 'normal' level until I change DSP from above 100hz bandwidth. I have FL4 set for 2dB gain; FL4 FRQ set to 0.00. Would appreciate any suggestions to fix this as I hope it is not 'normal' operation? Tom - W4BQF
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