On 17/01/17 14:58,
[hidden email] wrote:
> Subject: Re: [Elecraft] k-pod data cable
> Message-ID:
> <
[hidden email]>
>
> Content-Type: text/plain; charset=UTF-8; format=flowed
>
> I read "short distance..." after sending my stuff. I think you
> are correct about the I2C electrical connection, but I still
> think Elecraft needs a box to box communication protocol which
> allows multi-masters. USB would do, but probably isn't the only
> choice. Ethernet?
>
> There is a question of just how much distance needs to be
> supported. If you have your KPA500 at the base of your antenna,
> that is quite a distance, on the other hand, you probably don't
> need to control you K3 from there.
"CAN Bus" (Controller Area Network) would do the job. Either a single
(screened) twisted pair (differential signalling, highly resistant to
external EMI) or two pairs. Its extensively use in vehicles, industry
and many places where there is lots of electrical QRM. Serial data
rates can be high (many 10's of kBaud) and nodes are addressable.
No need to invent yet another bus.
73.
Dave G0WBX.
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