I'm not aware of a profile optimized for weak signal work, but I have in
mind several improvements to MMTTY's RTTY decoder that should improve its
weak signal capabilities.
73,
Dave, AA6YQ
From: Jeff Blaine [mailto:keepwalking188@yahoo.com]
Sent: Thursday, March 12, 2009 10:42 AM
To: Dave AA6YQ
Cc: BIll Duffy; RTTY Reflector
Subject: Re: [RTTY] EU1SA, AA6YQ profiles in MMTTY
Hi Dave,
May I know if there is another profile available that is optimized for weak
signal work?
Meaning the settings are providing the maximum ability to deal with low SNR
conditions.
THanks
73/jeff/ac0c
Dave AA6YQ wrote:
See
<http://lists.contesting.com/pipermail/rtty/2009-January/027738.html>
<http://lists.contesting.com/pipermail/rtty/2009-January/027738.html>
73,
Dave, AA6YQ
-----Original Message-----
From: BIll Duffy [mailto:bjduffy@cox.net]
Sent: Sunday, January 25, 2009 8:46 PM
To: Dave AA6YQ; RTTY Reflector
Subject: Re: [RTTY] EU1SA, AA6YQ profiles in MMTTY
How does one access these profiles?
( I know it's a dumb question.....but how will I learn if I don't ask?)
Bill
KA0VVXK
----- Original Message -----
From: "Dave AA6YQ" <mailto:aa6yq@ambersoft.com> <aa6yq@ambersoft.com>
To: "RTTY Reflector" <mailto:rtty@contesting.com> <rtty@contesting.com>
Sent: Sunday, January 25, 2009 7:17 PM
Subject: Re: [RTTY] EU1SA, AA6YQ profiles in MMTTY
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" <mailto:K6LL@ARRL.net> <K6LL@ARRL.net>
To: "RTTY Reflector" <mailto:rtty@contesting.com> <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
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