Thanks, Vladimir, I'm glad we have connected.
While you may have developed the EU1SA profile for contesting, I have found
it quite helpful when DXing. As most of the entities I still need on RTTY
are rare, the ability to decode when multiple signals are present is
(unfortunately) useful.
73,
Dave, AA6YQ
-----Original Message-----
From: rtty-bounces@contesting.com [mailto:rtty-bounces@contesting.com]On
Behalf Of Vladimir Sidorov
Sent: Sunday, January 25, 2009 7:15 PM
To: RTTY Reflector
Subject: Re: [RTTY] EU1SA, AA6YQ profiles in MMTTY
Dave,
As I am quite familiar with the profile (see my signature), let me add a
couple of words to the discussion.
The "EU1SA" profile is mostly not about decoding, but first of all, it's
about extra filtering. It makes the MMTTY RX bandwith exactly matching the
RTTY signal. The brickwall DSP filter with sharp skirts cuts everything off
but the desired signal. It is clearly seen at the tuning indicator. With
such a set up you can even use wide SSB filters and still have pretty nice
results overall. Obviously if you use other filters, as well, it makes the
overall selectivity even better.
Yet another positive aspect of that is the tuning easiness. It comes from
the fact that only one and only signal matches the bandwith. The moment you
tuned to a station, the signal is already readable/decodable and you only
need a bit of fine tuning, if any.
As you can see, this profile is mostly just another contesting tool. It
helps quick tuning and easy decoding regardless adjucent QRM. And still, it
provides the decoder with a narrower bandwith to process, virtually one
signal a time.
73,
Vladimir VE3IAE aka EU1SA
---
----- Original Message -----
From: "Dave Hachadorian" <K6LL@ARRL.net>
To: "RTTY Reflector" <rtty@contesting.com>
Sent: Sunday, January 25, 2009 5:07 PM
Subject: [RTTY] EU1SA, AA6YQ profiles in MMTTY
>I just tried those two profiles, listening to FM1FV run a
> pileup on 14084. Neither profile copied as well as the
> standard rtty profile, which I had running in a separate
> window. Are the EU1SA and AA6YQ profiles supposed to be used
> under special circumstances only?
>
> Dave Hachadorian, K6LL
> Yuma, AZ
>
>
> _______________________________________________
> RTTY mailing list
> RTTY@contesting.com
> http://lists.contesting.com/mailman/listinfo/rtty
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