To: | "Ian White, G3SEK" <g3sek@ifwtech.co.uk>, rtty@contesting.com |
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Subject: | Re: external DSP audio filters (was Re: [RTTY] AA5AUContestNotes for CQWW RTTY now on-line) |
From: | Jerry Pixton <jpixton@shentel.net> |
Date: | Sat, 02 Oct 2004 16:35:10 +0000 |
List-post: | <mailto:rtty@contesting.com> |
At 01:54 PM 10/2/2004 +0100, Ian White, G3SEK wrote:
Jerry Pixton wrote:Do the outboard DSP filters do anything that the radios' built-in DSP filters and de-noisers cannot? Absolutely! As you recall some months ago I figured out how to get the best filtering out of my IC756proII by using the LSB-data filters instead of the RTTY filters. And the FT1000mp has a good set of filters. But the outboard DSP filters have a much steeper slope that really enhances the audio that goes to the soundboard for MMTTY, etc to work with. Don pointed this out some time ago, and I bought one DSP unit to try, used it for one contest and immediately bought the second unit for the other radio. About half the time on a busy contest band, like 20 was the other day, I use the narrowest filters from the radios (250 hz) AND the 250 hz DSP rtty filter on the outboard unit. BTW, I rarely use the DSP filtering in the FT1000mp - it never seems to do anything for rtty. Jerry, W6IHG 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.
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