[GreenKeys] Computer Questioon

[Ron Kolarik]

Keith,

If you have a TU feeding the TTY machine then what you propose would 
work if I'm reading it right.
Something like MMTTY uses the sound card for in/out, it's all audio and 
the TU will handle the hv loop,
as long as the TU has AFSK out you should be set. Different baud rates 
are easy to set up in most digi
mode programs so not dependent on RS-232.

Ron
K0IDT


On 8/18/2015 5:36 PM, Keith Densmore wrote:
>
> Hi All,
>
> OK I am not the sharpest tool in the shed when it comes to computers. 
> I know just enough to get myself in trouble.
>
> That said, I have a question.
>
> It seems that to interface a TTY to a computer you have the following 
> possible contentions.
>
> 25 pin rs232 now obsolete
>
> 9 pin rs232 ditto
>
> usb 2.0 being upgraded to 3.0. Different drivers for different machines,
>
> Different versions of windows or Linux which affects the above.
>
> Not all drivers support low speed 45.5 or 50 baud.
>
> But when you interface through the soundcard you can
>
> use any soundcard
>
> use any computer
>
> support any slow speed desired.
>
> If someone has gone to the trouble of finding a mechanical TTY you can 
> be pretty sure they have a converter with loop supply.
>
> ITTY is a great example. I can run it from my laptop or any other 
> computer past or present.
>
> Wouldn't be simpler to have comms programs write/read to a soundcard 
> instead of RS232? Or am I missing something here?
>
> Thanks,
>
> Keith ve3ts
>
> -
>

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