Re: Preventing Random X-10 Code interference...

[nobody@xxxxxxxxxxxx (Dave Houston)]

No, it's not likely that the lack of an antenna is responsible although a
weak signal is more likely to be misinterpreted than a strong one. I suspect
this is more a matter of the CM15A still being a "work in progress".

It's quite a bit more complicated than you've surmised. On the powerline "1"
becomes "10" and "0" becomes "01". And the RF codes do not directly
correspond to the equivalent PLC codes.

TVs, monitors, plasma screens, etc. can radiate RF interference. This might
directly affect a nearby RF receiver or it might be picked up by the
household wiring and cause problems both for RF receivers (through
reradiation) and for PLC devices. Filters cannot block radiated RF. It can
also get to the powerline by conduction which is what a filter should block.
But, the filters are probably rather narrowly tuned for 120kHz while the PLC
devices may have wider bandwidth.

Can more than one motion detector be seeing the same motion?

"Michael G." <514mike@xxxxxxxxx> wrote:

>Hi Dave,
>
>Yes, it would make sense that the coupler/booster would potentially
>fire off some extra signals.
>
>I have now been gone from 10:15 to 1:45.
>
>Once again, there were no stray codes coming off the house wiring,
>
>But I do see a "B Mute" via RF, which arrived .3 of a second after the
>Active Eye in my office sent an RF command, and that's it.
>
>By the way, my LG monitors were on.
>
>My really noisy Viewsonic 17" (that spit out codes every 3 seconds) is
>still unplugged.
>
>I wonder if the sheer fact that my CM15A, which is 15 feet from my
>office Active Eye is misreporting these RF codes because the antenna is
>cut off.  Maybe it's just picking up small pieces of the transmission.
>
>This is way over my head, but when I took a basic computer class, we
>learned binary, so I know 0001 is "1".  I am not sure what "3" is. 0011
>perhaps?
>
>So I wonder if all these stray 1's and 3's are because it's just
>picking up the tail end of the Active Eye transmission.
>
>Luckily, it's not rebroadcasting anything throughout the house, because
>I set it to not transceive any housecodes.
>
>I'll see what happens throughout the day, and I'll see if more of these
>stray RF codes coincide with any other events...