[RTTY] Take Two RTTY Exchange

[Bill Turner]

Thanks, Chen. As always you shed some new light on the issue.

73, Bill W6WRT


On 1/17/2012 1:49 AM, Kok Chen wrote:
> On Jan 16, 2012, at 11:42 PM, Bill Turner wrote:
>
>> If Ed sends 599 CA and it gets garbled so it prints 599 CO, the other
>> guy sees it's a valid state name and will copy it correctly but the
>> information is wrong.
> This particular example is probably [sic] not a good choice, Bill :-).
>
> 4 out of the 5 Baudot bits of an "A" would have to flip themselves to produce an "O."   A single "CA" printing as "CO" is going to be quite rare.
>
> Threshold biasing from QRM that is on one side of the RTTY signal will not likely produce the CA-to-CO error either, since both A and O have the same Hamming weight.
>
> On the other hand, "CA" turning into "VA" requires only a single bit change.
>
> 73
> Chen, W7AY
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