Julian, G4ILO wrote:
>
> I got mine to work once I started setting the serial port configuration to
> one stop bit not two. I believe the recommendation for the K2 was for two
If reducing the number of stop bits, in an application that is not
critically dependent on high data rates, improves things, there is a
serious design fault.
Non-mechanical asynchronous serial receivers need a little over half a
stop bit. Anything more than that simply gives a buffer against speed
errors, and faster recovery from false start bits (in noisy environments).
The resson for two stop bits (which is actually only 1.5 for 5 unit
codes) is to allow time for mechanical decoders to recover. That's why
they are only, conventionally, used for low speeds, where mechanical
decoding is possible.
Some, very simple, hardware interfaces may be only single buffered, in
which case going to two stop bits may be needed, However, for those,
reducing the number of stop bits is that last thing you want to do.
--
David Woolley
"The Elecraft list is a forum for the discussion of topics related to
Elecraft products and more general topics related ham radio"
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