Re: X10 AGC and Insteon

["Jeff Volp" <JeffVolp@xxxxxxx>]

The XTB-II does include a 120KHz LC filter, but it has sufficient bandwidth
to pass both "sloppy" X10 and Insteon signals.  The XTB has been used to
boost Insteon signals, and I didn't want to eliminate that possibility.
Most of the noise isn't coming through that path anyway.  Line transients
come through the 60Hz AC path that powers X10 transmitters plugged into the
X10 input receptacle.

Jeff

"Joerg" <notthisjoergsch@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:dMa%g.16993$vJ2.9082@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>
> Doesn't Insteon use 131kHz? If that is the case you might consider a
> 120kHz LC filter with high enough Q to sufficiently suppress 131kHz but
> not so high as to let X10 devices with sloppy alignment fall too far
> down the slope.
>
> Of course one could devise a steep elliptic bandpass that goes from
> 115-125kHz but that would probably be over the top here. One or too
> loosely coupled LC should be fine. This will also greatly improve your
> SNR except in cases where a switcher harmonic or other noise falls smack
> onto 120kHz.
>
> --
> Regards, Joerg
>
> http://www.analogconsultants.com