sabersaw
Premium
join:2001-08-21
Dayton, OH | bring on the qrm
here comes static on the HF bands. |
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PDXPLT
join:2003-12-04
Banks, OR | Actually, I think they use Homeplug technology, which notches out the ham bands from its transmit spectrum to avoid interference. |
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Mactron
el camino Real
Premium
join:2001-12-16
CM94sv
| reply to sabersaw
Alex Pardo of Cinergy said the Internet traffic travels on a separate band wave from the electric current, so there's no interference.
He said the utility has found no problem with radio wave interference, a concern raised by many amateur radio operators.
Lets hope it's true.;)
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Facts do not cease to exist because they are ignored. Aldous Huxley |
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w2co
join:2003-07-16
Longmont, CO
| "He said the utility has found no problem with radio wave interference, a concern raised by many amateur radio operators."
Yeah well I suppose you would believe your used car salesman when he told you that your car did not put out exhaust gasses. Dream on - I won't get into the explanation on this subject anymore except to say that an rf signal introduced to an open wire WILL Radiate. Physics 101. |
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yabos
join:2003-02-16
Ingersoll, ON | So, if it doesn't emit any interference in the HAM and emergency bands then who cares. |
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w2co
join:2003-07-16
Longmont, CO
| Well the ham bands are not the only places in the hf spectrum that are being used. You have the NTIA with hundreds of government/defense frequencies in heavy usage daily, you have FEMA with plenty of hf usage, the airlines transoceanic flight system on hf, what about the regular shortwave bands? Ham radio only takes up aprox. 6% of the 1-30Mhz spectrum. I am happy to hear that they are notching out the ham bands, but they will still have plenty of complaints after wide area deployment. The noise floor will steadily increase with each deployment, and with skipzone more and more into play, it will spell doom. |
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A_Ham
@63.227.x.x | reply to PDXPLT
What about all the harmonics of the fundamental frequency? Notching out the ham bands does not necessarily notch out the harmonics. |
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sabersaw
Premium
join:2001-08-21
Dayton, OH
1 edit | reply to sabersaw
you have that right on with radiation of RF over open wires and the harmonics which will follow. Honestly I am ignorant to what freqs. the async signals will utilize, but it must bring the noise floor up on HF at some point, to say otherwise would dispute everything I have experienced with RF. The providers and equipment companies will become sloppy in their work soon enough. Just like the pager industry and what it has done to vhf/uhf bands in metropolitan areas. |
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