Recipe at http://puppylinux.org/wikka/CreatingMultiSessionFromPuppy
73,
Rein PA0R
-Ursprüngliche Nachricht-
Von: digitalradio@yahoogroups.com
Gesendet: 12.09.07 03:16:42
An: digitalradio@yahoogroups.com
Betreff: Re: [digitalradio] PSKmail save session to CD?
but when
Somewhere I saw a solution for calibrating a soundcard (not using WWV). Can
anyone help with this please - I want to write a DD to do this then add the
code to a program of mine.
Why? Because I'm thinking about MT63 - looks interesting but the soundcard
accuracy is important.
Simon Brown,
Sorry, typo - I want to write a DLL.
Simon Brown, HB9DRV
- Original Message -
From: Simon Brown
... I want to write a DD to do this then add the code to a program of mine.
With Pactor 2 and 3 they get a type of diversity gain by changing the
order of which tones are swapped back and forth. This is specified in
their description of the P3 protocol, but I don't fully understand
this
and maybe this is not easy to implement.
Let me describe what I learned
Vojtech,
If you can design a good solution like this and make a good C++ class
available I am sure many programmers would be very happy to add this
support, if only to get rid of the 'jolly' Pactor from the airwaves.
Simon Brown, HB9DRV
- Original Message -
From: Vojtech Bubnik
--- In digitalradio@yahoogroups.com, Simon Brown [EMAIL PROTECTED]
wrote:
Somewhere I saw a solution for calibrating a soundcard (not using
WWV). Can anyone help with this please - I want to write a DD to do
this then add the code to a program of mine.
Why? Because I'm thinking about MT63 -
Doesn't this assume an accurate system clock? I think I see a class in gMFSK
/ fldidgi to compare input = output but for calibration we need an
accurate source.
Simon Brown, HB9DRV
- Original Message -
From: Vojtech Bubnik [EMAIL PROTECTED]
I think Patrick in his MultiPSK has some
Doesn't this assume an accurate system clock? I think I see a class
in gMFSK
/ fldidgi to compare input = output but for calibration we need an
accurate source.
If your system time is 1 second off every day, system clock precision
is 1 / (24*60*60) = 12 ppm. My feeling is that this is good
The SCS Pactor modems use Viterbi encoding/decoding according to the
information published by Dr. Rink in the RTTY Digital Jounal in the
mid 1990's:
Very efficient error control coding using a convolutional code with a
constraint length of 9 and a real Viterbi decoder with soft decision is
Very good points, Vojtech,
It was my understanding that the specific permutations of the changing
order of the tones was discussed in their published specifications:
Similar to the PACTOR-II protocol, the digital data stream that
constitutes a specific virtual
carrier is swapped to a different
Here is something interesting...what is this mode all about? I
received email on the Internet , any ideas. Is it radio or spam ?
-- Forwarded message --
From: Global Link Network [EMAIL PROTECTED]
Date: Sep 12, 2007 9:26 AM
Subject: Mail has been transfered succcessfully
To:
Hello Vojtech and Simon,
Im very interested in finding away to calibrate my soundcard to
something easier then wwv. MT63 is a hard program to setup.
jeff
-- In digitalradio@yahoogroups.com, Patrick Lindecker [EMAIL PROTECTED]
wrote:
Hello Vojtech and Simon,
suppose he measures with
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