[RTTY] [CQ-Contest] RTTY contest software

[Bill Turner]

ORIGINAL MESSAGE:

On Sun, 22 Oct 2006 11:32:48 -0700, Kok Chen <chen at mac.com> wrote:


>I think this is reason why many people use multiple modems.  With  
>cocoaModem, I had implemented 9 separate FSK demodulators to watch a  
>single signal -- each demodulator has a slightly different relative  
>mark/space delay and a different ATC (automatic threshold correction  
>in the slicer) time constant.  The nine outputs then goes through a  
>soft decision logic to print a single character to the screen --  
>basically, it is like a human watching multiple modems to decide  
>which character to use when they are different, but it is not as  
>smart as a human, it does not do context sensitive stuff that a human  
>brain is really good at; or the 123456... to QWERTY conversion in  
>Baudot.  A good adaptive equalizer will be better than using multiple  
>demodulators, but I am not smart enough to design a good adaptive  
>equalizer for HF band conditions.

------------ REPLY FOLLOWS ------------

very impressive. I think the time has come for me to try cocoaModem. I
know nothing about Apple computers, however. Could you advise me on
what to look for in a computer? I will probably look on eBay. What do
you suggest?

Many thanks,

73, Bill W6WRT