 mikef1Mike
join:2004-10-28
Littlestown, PA | is it really that hard? Is it really that hard to deploy BPL without causing interference?
Up on the pole you have power, pots, cabletv - do they not cause interference?
My fault at not looking at the technology, but I just dont see how putting another signal on a power line has to cause all this interference.
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mike
HouseOfMike |
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| said by mikef1:Is it really that hard to deploy BPL without causing interference? Up on the pole you have power, pots, cabletv - do they not cause interference? My fault at not looking at the technology, but I just dont see how putting another signal on a power line has to cause all this interference. The key difference is copper twisted pair and coaxial cable is self-shielding, power lines are not. Any high frequencies you place on them will naturally radiate off. This is why antennas work; any unshielded wire at least a quarter wavelength long radiates into the atmosphere. |
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 MiddiemanEschew Obfuscation
join:2001-02-05
Elkins Park, PA | The FCC band plan can be viewed here:
»www.fcc.gov/oet/spectrum/
It looks like there's some "fixed Mobile" and private Mobile services in 30-50mhz. I'm thinking cab companies, security and the like. Fixed Mobile isn't the most specific description in the world. Also there's some radio astronomy down there.
Radio astronomy? Could that be down there because it's not transmitting anything and typically very far away from the RF noise of the city? It might not be affected by BPL. Regardless, I want NO ONE to mess with radio astronomy! No sarcasm here. I think radio astronomy is cool and potentially important. 
-=[Middie]=-
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