Simon Brown wrote: > > I don't think you should run these on the 480 as they are in the AF > chain and will always degrade the information you need to decode the > signal. > > It's not what you hear, it's what your software can decode. Let the > software do the work... > > Simon Brown, HB9DRV
I had understood, perhaps incorrectly, that the TS480 provided for mechanical filters, i.e. the excellent Kenwood 500 or 250 hz filters. Those would not lie in the AF chain and instead would protect the AGC from pumping and would make a world of difference. AF DSP filters are another story, of course. For example, the DSP filtering in my FT-897 is not much good for the digital modes in my opinion because they do not prevent strong adjacent signals from activating the AGC thereby desensitizing the radio. For this reason I equipped it with a 300hz mechanical filter, which is a huge help when running digital. If the AGC desensitizes the radio, that makes it that much more difficult for the software to "do the work." The software is having to work with less signal rather than more. de Roger W6VZV
