Re: Need help with PLC noise problems in a Manhattan (New York City) apartment

[ddl@danlan.*com (Dan Lanciani)]

In article <43a09815.39402332@xxxxxxxxxxxxx>, nobody@xxxxxxxxxxxx (Dave Houston) writes:
| ddl@danlan.*com (Dan Lanciani) wrote:

| >|the impedance of the wiring itself but I don't quite understand how a 6825
| >|can attenuate alien signals without also attenuating legitimate signals
| >|trying to go from 2B to 2C.
| >
| >It can't.
|
| Then if the 6285 really will cause as much trouble for interpanel signals as
| it will for alien signals, I don't see any advantage to using them here.

It's tricky to say without really knowing what's going on.  If he is dealing
with fixed-threshold receivers and if the noise is above the threshold then
there is no choice but to reduce the noise(*), even if it is at the expense
of valid signals.  It's one of those communications problems where the best
you can do is attenuate everything and increase the real signal to compensate.
Without some kind of AGC or automatic threshold adjustment in the receivers,
merely improving the signal to noise ratio doesn't help:  the absolute noise
level is what matters.

(*) Ok, you do have the choice of modifying the receivers to change the
threshold.  I did that with some generic X10 2-wire switches.  There isn't
much headroom, so you have to enjoy fiddling...

				Dan Lanciani
				ddl@danlan.*com