Yes, the hub keeps the main line and that branch "in-line" and the rest
excluded. (At least that's my understanding).

I've never seen a bus-master fail, though I suppose it's always possible.
What do the measured voltages show?

Paul


On Thu, Mar 28, 2013 at 7:00 PM, Jim Duda <[email protected]> wrote:

> On 03/28/2013 04:28 AM, Colin Law wrote:
> >
> >
> > You said it had been working for many years.  What did you do that
> > made it start failing?  Was it the upgrade of the code or was it
> > already failing before that?  If it started failing before you did
> > anything to the software (or hardware) then that suggests a hardware
> > problem.  If it only started after upgrading the s/w (and you did not
> > change the h/w at the same time) then that suggests a s/w related
> > problem.
>
> It's definitely a hardware problem.  I did nothing to make it change.
> Something degraded.  I'm trying to figure out how best to debug
> what is broken.  It could be serial adapter, hub, or wiring.  I'm
> trying to break it down to hopefully one segment, either the main
> line, which feeds the hub (input or passthrough), or one of the lines
> from the hub (from main or aux).
>
> The first answer I am looking for is does the HUB isolate each main/aux
> branch from the main line input feed and passthrough by virtue of what
> it does?
>
> I upgraded to the latest software in hopes that there would be some
> nice nifty change to just make the problem go away :-)
>
> Regards,
>
> Jim
>
>
>
>
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