Re: Water heater eating X-10 signal

[nobody@xxxxxxxxxxxx (Dave Houston)]

lnh <lnoh@xxxxxxxxxxxx> wrote:

>> And in fact it was pretty hard to see even on a scope.  Those switches
>> seem to be among the most sensitive X10 receivers.
>
>So what is the best way to see the noise on a scope?
>
>Hook the scope to an X10 bridge to filter the 60Hz and make the X10
>signal and noise easier to see?
>
>It would be hard to see the noise riding on a 120V signal without
>blowing out the input on the scope.

It depends on the noise. X-10 bridges and ACT's ScopeTest2 are also tuned
circuits that may filter out the noise.

One other option is just an RC circuit like the one in Appendix C of
Microchip's appnote AN236 but even with that I could never see what my old
NEC monitor vwas putting out that gave Smarthome (but not X-10 made) modules
a fit.