--- In [email protected], "Simon Brown" <[EMAIL PROTECTED]> 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... > >
Eh? That's a pretty broad generalization to make. If John was referring to the mechanical filters on the 480, then you're flat-out wrong. They're in the IF chain, and do an excellent job of eliminating AGC pumping, in particular. I have both the 500hz and the 270hz filters, and they're invaluable for making signals that would have been dumped into the noise by the AGC usable. Especially on RTTY contest weekends. ;-) If you mean the DSP filters - which are in the AF chain - then yes, the software should be able to do most of the work. Nonetheless, I've found that the 480's NR and DNL do help in bringing very low signals to the threshold of readability, when the software is struggling to decode. - Rich
