Don't know about BPL, but VDSL goes from 138KHz to 12MHz and has 4096 tones. Not as much potential for a problem, as it's all twisted pair rather than power lines.

Frank Dresser wrote:

"Walter Treftz" wrote in message
...
Here's what we do --- we built a (legal) KW rig into a van, install a
vertical-
radiating antenna, cut out the roof and replace it with a fiberglass
sheet. Drive directly underneath a power line with BPL running. Run lots
of QSO's, and
have at it. We're legal. Induced RF just might make them think twice
about it.
Yes, I know Ashcrofts boys are reading this --- Hi, muthers -- I live at

the callbook address. Bring some beer when you come visiting.
N4GL


Do you mean the way CBers made channel 5 unwatchable 25 years ago?

I don't know much about BPL, but I think the TV analogy might hold. Given
the bandwidth of BPL, there must be dozens, maybe hundreds of channels on
the powerline. Can every one, or most of them, be wiped out? I'm thinking
somebody came up with some pretty robust ways to deal with interference.

But what if it does stop BPL? BPL isn't being backed because it's a
technically elegant system. It's being backed by politics. Rural areas
were critically important in the last Presidential election, and any
candidiate would love to say something like "MY OPPONENT IS STOPPING ONE
FORM OF HIGH SPEED INTERNET DISTRIBUTION ON BEHALF OF HIS PALS IN THE
TELECOMMUNCATIONS INDUSTRY, BUT I PROMISE TO BRING IT IN, RIGHT ON YOUR
POWER LINE, AS SOON AS I'M ELECTED!!" Of course, that would be a political
misrepresentation, but politicans get away with worse every day. Politics
turns into a numbers game.

How many politicians or bureaucrats are saying anything negative about this
goofy scheme? Politicians may not know physics, but they do know how to
count.

Frank Dresser