[Elecraft] BPL
Dan Allen
[email protected]
Fri Aug 15 13:33:01 2003
We should also campaign to have *all* power lines placed underground as they
do in Europe. This is a safety and national security issue as well as an
interference issue.
Dan Allen
KB4ZVM
K2 S/N 1757
----- Original Message -----
From: "Kenneth E. Harker" <[email protected]>
To: <[email protected]>
Cc: <[email protected]>; <[email protected]>;
<[email protected]>; <[email protected]>
Sent: Friday, August 15, 2003 12:34 PM
Subject: Re: [Elecraft] BPL
> On Fri, Aug 15, 2003 at 09:13:29AM -0700, [email protected] wrote:
> > As I understand it, the Broadband over Power Line (BPL) proposal by the
> > electric power companies is an attempt to have the FCC relax the present
> > power line radiation limits. Yet, in the same breath, the electric
power
> > companies have stated that BPL already is within those limits. If so,
> > then why do they want the limits relaxed?
>
> BPL is a part 15 unintentional radiator. That is, radiating RF is not
> necessary for the function of the product in question - it is merely an
> undesired by-product. For BPL to work under current Part 15 radiation
> limits (which are already high enough to cause serious interference) the
> amount of power used by the BPL system is low enough that (a) the
effective
> bit rate is probably not competitive with DSL or cable modems, and/or (b)
> BPL providers would need to install many, many signal amplifiers on the
lines
> to keep the bit rate up, which is expensive. In fact, at current Part 15
> regulations, BPL is probably not a profitable venture.
>
> By raising the Part 15 allowable radiation limits, and/or making BPL an
> exception to them, they can use more power, making the data signal travel
> farther on the lines with fewer errors. Of course, it will cause
> substantially more QRM for anyone using 2-80MHz. Looking at BPL as an
> "unintentional radiator" is like saying that a cheese grater might be
> "unintentionally leaky" when used as a hose.
>
> > To file your comments on-line with the FCC, go to
> > http://gullfoss2.fcc.gov/prod/ecfs/upload_v2.cgi
> >
> > The Proceeding number which you should type into box 1 is 03-104.
> >
> > The deadline for filing your comments is August 20th.
>
> Absolutely everyone should let the FCC know what they think about this
> today!
>
> --
> --------------------------------------------------------------------------
--
> Kenneth E. Harker "Vox Clamantis in Deserto"
[email protected]
> University of Texas at Austin Amateur Radio Callsign:
WM5R
> Department of the Computer Sciences Central Texas DX & Contest
Club
> Taylor Hall TAY 2.124 Maintainer of Linux on
Laptops
> Austin, TX 78712-1188 USA
http://www.cs.utexas.edu/users/kharker/
> --------------------------------------------------------------------------
--
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