t;
> _
>
> From: digitalradio@yahoogroups.com
[mailto:digitalra...@yahoogroups.com] On
> Behalf Of jhaynesatalumni
> Sent: Thursday, February 26, 2009 3:04 PM
> To: digitalradio@yahoogroups.com
> Subject: [digitalradio] Re: on another note
>
>
>
> --- In
radio@yahoogroups.com
Subject: [digitalradio] Re: on another note
--- In digitalradio@ <mailto:digitalradio%40yahoogroups.com>
yahoogroups.com, "W5XR" wrote:
>
> I'm asking. :)
>
> Bob, W5XR.
O.K.
For START-STOP synchronization to work the receiving shaft
--- In digitalradio@yahoogroups.com, "W5XR" wrote:
>
> I'm asking. :)
>
> Bob, W5XR.
O.K.
For START-STOP synchronization to work the receiving shaft (selector
or distributor) has to stop between characters. The Morkrum Co.
(ancestor of Teletype Corp.) had the sending and receiving distributor
I'm asking. :)
Bob, W5XR.
_
From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On
Behalf Of jhaynesatalumni
Sent: Wednesday, February 25, 2009 8:26 PM
To: digitalradio@yahoogroups.com
Subject: [digitalradio] Re: on another note
--- In digital
--- In digitalradio@yahoogroups.com, "Patrick Lindecker"
wrote:
> A synchronous RTTY under Windows is possible with a standard symbol
> synchronization (with or without a PLL which can be seen as the
"digital
> flywheel"). However, the stop bit (1.5 symbols) complicates all as
it is not
> an
...
73
Patrick
- Original Message -
From: "jhaynesatalumni"
To:
Sent: Wednesday, February 25, 2009 5:54 PM
Subject: [digitalradio] Re: on another note
> --- In digitalradio@yahoogroups.com, "Vojtech Bubnik" wrote:
>
>> Patrick, I have a proposal for one low
--- In digitalradio@yahoogroups.com, "Vojtech Bubnik" wrote:
> Patrick, I have a proposal for one low hanging fruit project. How
> about to receive RTTY in a synchronous way? I believe most SW really
> generate precise synchronous RTTY, where the only variable is the
> unknown stop bit length (mo
Hi Patrick and others.
> I don't think it would be technically very difficult to do something
equivalent to P3 with sound cards. I think that it would even possible
to do much better with, for example, multi-users protocol.
I completely agree.
> The problem is the time necessary to do this. An a
Something I forgot to mention earlier in suggesting a Pentium with
sound card might be usable as a dedicated DSP engine - the K6STI
software absolutely required an ISA SoundBlaster. If we want to
define a new DSP engine we need some higher level of abstraction
to be able to cope with hardware that
While the Pactor 2 and 3 modes are quite good, they do use a constant
100 baud signaling rate. SCS indicated a number of years ago that their
tests showed that with what at that time, they considered strong DSP,
the desire for improved data throughput and I think resistance to
Doppler, the 100
--- In digitalradio@yahoogroups.com, "Rud Merriam" wrote:
>
> First, I would not dismiss sound card modes. I think there is much more
> that can be done with them. One of the main issues IMO is that they
> don't (1) adapt to changing band conditions, and (2) don't utilize FEC
> as much as is possi
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