Re: CM10A (IBM Home Director serial i/f) AC jack (outlet)

[msg@xxxxxxxxx]

msg@xxxxxxxxx wrote:

> There is an AC outlet (jack) on the IBM Home Director version of the
> CM10A; it has no power (off) by default and it doesn't respond to unit
> address 1 (there is no unit select switch).  Presumeably there is a
> function code that will activate it.  Anyone know how (the CM11/CM10
> protocol description at tanj.com does not mention it)?
>

Never mind, it turns out that the outlet is powered; it must be an
isolated (emi surpressed) ac outlet to prevent a switched load
(e.g. computer) from propagating noise onto the power line.  It is
not switched (sorry, I didn't open the unit to inspect).

Regards,

Michael

BTW, a useful tool to trace x10 signals is an FM power-line intercom;
x10 signals create a recognizable pulsed tone on an intercom, which
will verify if signals are present or absent at a proposed location.