It's hard to believe that it goes back over 10 years now, but the HomePlug
protocols do not use the Amateur bands, with the exception of the 5 MHz band,
which was allocated after the protocols were written. I worked with HomePlug
engineers to do testing of the protocol with and without the notches. HomePlug
operates at 4-20 MHz. The HomePlug AV spec runs to 28 MHz and there is a new
HomePlug Gigabit spec that runs to 200 MHz.
In the Gigabit spec, the 6- and 2-meter bands aren't filtered, but the levels
are about 30 dB lower than the HF operating level, so the noise levels are
correspondingly lower. I think, however, that VHF interference is possible. I
just haven't had the time to go get a pair of the Gigabit modems and do some
measurements and testing. Repors are most welcome.
But the spectral masks that HomePlug has applied to the Amateur bands is
successful. There are about 20 million HomePlug modems sold in the US to date,
and to date, ARRL has received zero reports of interference to the Amateur
bands traced to HomePlug products.
See:
http;//p1k.arrl.org/~ehare/bpl/HomePlug_ARRL.pdf
.
73,
Ed Hare, W1RFI
ARRL Laboratory Manager
225 Main St
Newington, CT 06111
Tel: 860-594-0318
Email: W1RFI@arrl.org
________________________________
From: K1TTT [mailto:K1TTT@ARRL.NET]
Sent: Fri 7/16/2010 7:29 AM
To: rfi@contesting.com
Subject: Re: [RFI] HomePlug Experience?
I was afraid of that also when I put in a pv system. The pv inverters talk
to a monitoring box using 144khz plc which is very narrow band and no
problem. But because of the limited range the monitoring box had to be too
far from my router, so the company sent me a pair of homeplug bridges. They
are supposed to be 4-20MHz, but I can't hear them. Perhaps this is only
because of the relatively low data rate and intermittent transfers actually
used, but they don't seem to be a problem here.
David Robbins K1TTT
e-mail: mailto:k1ttt@arrl.net
web: http://www.k1ttt.net <http://www.k1ttt.net/>
AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
> -----Original Message-----
> From: Ian White GM3SEK [mailto:gm3sek@ifwtech.co.uk]
> Sent: Friday, July 16, 2010 07:09
> To: rfi@contesting.com
> Subject: Re: [RFI] HomePlug Experience?
>
> Eric Rosenberg wrote:
> > It looks like I'll need HomePlug to get from my router in the basement
> >to the second floor, as no wireless devices penetrate this 70-year old
> >plaster and lathing house.
> >
> >I presently have five Ethernet runs in the basement and two to the main
> >floor above the shack. They don't appear to be noisy or have an impact
> >on my urban station.
> >
> >Do any of you have experience with HomePlug in/near the shack?
> >
> >I'd like to know about your experience!
>
> http://www.ukqrm.org/
>
> Welcome to HF Hell.
>
>
> --
>
> 73 from Ian GM3SEK
> http://www.ifwtech.co.uk/g3sek
> _______________________________________________
> RFI mailing list
> RFI@contesting.com
> http://lists.contesting.com/mailman/listinfo/rfi
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