Re: Compact Fluorescent Noise

["Jeff Volp" <JeffVolp@xxxxxxx>]

"Dave Houston" <nobody@xxxxxxxxxxxx> wrote in message
news:454a03b9.267658953@xxxxxxxxxxxxxxxx
> "Jeff Volp" <JeffVolp@xxxxxxx> wrote:
>
> >Unfortunately, there seems to be some sort of audio communication device
on
> >the line now because I see apparent audio modulation of a 100mVpp 120KHz
> >carrier that is there whether or not the CF bulbs are on.  So it is
> >difficult to determine how much more noise is added by the bulbs.
>
> If you could gate your AGC to measure only between the 1st & 2nd X-10
> windows, as I suggested before, it should let you deal with the continuous
> noise.

I could put the gate anywhere, but between the 1st & second bursts wouldn't
work for:

http://jeffvolp.home.att.net/x10xmtbuf/cfnoise.jpg

Setting the threshold between the 1st and 2nd windows would cause that burst
on the right to be detected as a "1".

There doesn't appear to be an effective way to deal with the randomness of
this kind of noise on a cycle-by-cycle basis.  But then a longer term
average has its own set of problems.  Eliminating this kind of noise at the
source may be the best answer.

Jeff