Re: Insteon/X10

["Robert Green" <ROBERT_GREEN1963@xxxxxxxxx>]

Jeff Volp & Robert Green wrote

> > Seriously, though, the photo at:
> >
> > http://jeffvolp.home.att.net/x10_info/cfl_noise.jpg
> >
> > really shows how several CFL's operating in proximity can generate some
> > very
> > interesting noise patterns.
>
> That one was interesting as the pattern seemed to be "alive" with those
> bursts constantly changing in ampltude as signals summed together.  The
> reason the bursts appear in the X10 transmission window is that the CFL
> frequency drops into the X10 bandpass near the zero crossing.  At the
center
> of the waveform the chopper is running at a high enough frequency that the
> bandpass filter rejects the CFL noise.

For the less technically inclined, the "chopper" here is not the quirky but
highly recommended Aussie film starring "Black Hawk Down's" Eric Bana

http://www.imdb.com/title/tt0221073/

but "an electronic switch that is used to interrupt one signal under the
control of another."

http://en.wikipedia.org/wiki/Chopper_(electronics)

They imply you're a bit of a throwback (30 years or so) for using the word
chopper, and say that the more precise terms below are preferred:  (-:

switched mode power supplies, including DC to DC converters.
Speed controllers for DC motors
Class D Electronic amplifiers
Switched capacitor filters
Variable Frequency Drive

> > http://jeffvolp.home.att.net/x10_info/x10_couplers.htm  is remarkably
> > thorough.  Great diagram work, too, showing how the breakers are
connected
> > to the different phases
>
> The simulations really show why a coupler is so important.
>
> > I'd create a simple template for each page so that when you got to the
> > bottom of one you could jump to another, but that's a minor gripe.
> >
> > http://jeffvolp.home.att.net/x10_info/x10_reliability.htm  is one of the
> > few
> > pages missing a "return" at the bottom.
>
> That was the first one I did, so I'll have to go back and add a link.
>
> > Very impressive piece of work, Jeff.
>
> Thanks!
>
> > Now get to work completing:
> >
> > http://jeffvolp.home.att.net/x10_info/x10_collisions.htm
>
> I'm addressing that issue with the enhanced repeater version of the
XTB-II,
> and I'll complete that document when I finish the firmware.  Right now I'm
> sort of derailed due to the April 15 date screaming at me.  Also, Mouser
> backordered some of the parts that were listed as stock when I placed the
> order.

That damned "T" word!

--
Bobby G.