USB seiral at 50-Baud problem

Nils Kassube kassube at gmx.net
Sat Jan 10 22:41:20 UTC 2009


Forrest Myers wrote:
> I'm writing an RTTY program thathas to work through a USB to serial
> converter. It works if I set the baud rate to 150 Hz but fails at all
> speeds below that. At 150 Baud and above, the sending is normal. Below
> that, the thing just puts out a blip every once in a while. Since ham
> RTTY runs at 45.45 baud 5-bits this will not work.

It depends on the chip inside the USB - serial converter. If it doesn't 
support the desired baud rate you're out of luck. E.g. the PL2303 in my 
converter supports 75 baud and higher baud rates but not 50 or 45.45.


Nils




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