[GreenKeys] SITOR / AMTOR / NAVTEXT protocols

[Bob Camp]

Hi

On a "clean" connection that works pretty well, since there are  
almost no nak's. On noisy circuits it's still easy to get things  
jumbled up.

Bob


On Sep 20, 2007, at 6:15 PM, tony j. podrasky wrote:

> Hey Bob;
>
> There's a mode called ALIST - which overrides the ACK/NAK
> and let's you read the mail of 2 stations in communications.
>
> 73,
> W6ESE - tony
> NNNNZCZC
>
> Bob Camp wrote:
>> Hi
>> The problem with the "modern" protocols is that they are error   
>> correcting / retransmit protocols. If the receiving end sends a  
>> "nak"  you transmit the same packet again. They all have  
>> provisions for  multiple packets in transit, so keeping things  
>> lined up is a pain.  The character coding is normally straight  
>> ASCII plus a CRC or check  sum for most of them.
>> Bob
>> KB8TQ
> -- 
> Tony J. Podrasky | MicroSoft error messages written in Haiku:
>                  |
>                  |         Your file was so big.
>                  |         It might be very useful.
>                  |           But now it is gone.
> _______________________________________________
> GreenKeys mailing list
> GreenKeys at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/greenkeys
>