Thankz Anand and everybody.
There doesn't seem to be any checksum code - the following bursts, when you
hold the key down, are all the same as the first one. I think you would need to
give it at least two repetitions to validate. This one's a rather low end VCR.
I'll go check the PIC archives 4 some code ideas.

Best - Debbie :)


 --- Anand Dhuru <ardhuru@VSNL.COM> wrote: > >Most consumer codes do not have
checksums,
>
> Thats been my observation too.
>
> >but it is not uncommon for receivers to only respond
> >after seeing 2 correct codes.
>
> True; on the other hand, I have seen protocols that send the burst only once
> for each key stroke. That is, if the receiver misses the beginning of the
> stream (or any part in between, for that matter), it will not respond till
> the key is released, and pressed again. These protocols usually send the
> actual data once, and then just a simple pulse every few ms to indicate the
> key being still pressed.
>
> Anand Dhuru
>
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