Jerry Pixton wrote:
Since the JPS NIR-12 filters were not available, last spring I opted
for the MFJ 784B Audio DSP filters which I put in series from my
radios, FT1000mp and IC756proII, to the sound cards. In spite of good
filtering in both radios, the audio filters make a BIG difference. I
have the audio filters set up with a 500 hz and a 250 hz position as
well as a twin peaked position. With the hundreds of stations on 20
meters last week end I could search in the 250 hz position and
generally seperate almost all stations. The occassional stations that
were sitting almost on top of each other, I just put on the bandmap and
moved on unless they were a multi. If they were 50 hz or so apart then
the twin peak filter was useful. I would say that the audio filters
made a big improvement in my station.
Do the outboard DSP filters do anything that the radios' built-in DSP
filters and de-noisers cannot?
As far as I'm aware, the twin peak filter is the only feature mentioned
that the MP doesn't have at all (don't know about the Pro-II) but both
bandpass and twin-peak filtering are also available in MMTTY.
Or do the outboard DSP boxes really perform so much better than the DSP
options in the radios and in MMTTY?
--
73 from Ian G3SEK
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
|