On Thu, 19 Jan 2006, m g wrote:
> On Wed, Jan 18, 2006 at 07:28:05PM -0000, PeterElliot wrote:
> > Another issue is that some low power devices used a scavenging
> > technique to pull power from the unused lines to generate the voltage
> > used for their serial output.
> >
> > Have you tried putting a scope on the output from the PDA to see if
> > you are getting valid RS232 voltages?
>
> Interesting. I had planned on hooking up a scope, just haven't had the
> time lately to work on this problem. I'll post what I discover with the
> scope.
>
> I haven't worked with RS232 in a long time but I'm sure it is supposed
> to work at TTL levels. But, how about 3.3-V? Is 3.3-V all that is
> available on the TS?
No the output from the TS boards in my experience is well within
RS232 voltage levels. The circuit diagram shows the rs232 lines going
thru' level converters.
> Time to do some research. If this indeed is the
> problem, does anyone know of a solution? Am I the only one trying to
> connect a low power device to the TS?
>
> Thanks,
> Mike
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
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