vote4change
join:2004-10-19
Omaha, NE
| reply to mlmurray
Re: Where's the interference in all these trials?
Well it's hard to say, because the boys in the FCC OET are so clever at sitting on complaints and cheerleading the technology. They haven't the slightest regard to how it impacts licensed users. It's a money machine! It's a talking point for politicians. Normally complaints go to the enforcement bureau. Instead, BPL complaints get special treatment.
There have been complaints in just about every trial area. The hams complain because the garbage it generates makes their communication impossible and literally pollutes the radio spectrum. To them, it's harmful interference, and by definition, should be turned off. Rightfully so, the measurements made clearly show noise well above the ambient noise level that would prevent any other signal from being heard. The FCC has decided that it's going to ignore its own rules and decide what is harmful. In one case, they pulled to the curb of the complaintant, listened to the noise, then drove away. Then they dismissed the complaint as being resolved. Literally. They never even made contact with the person.
The truth is it causes absolute interference when data is being transferred for anyone within about 1500'. Depending on the strand of power line and the licensee's antenna, it can be heard a mile away.
The Cottonwood, AZ trial continues to generate complaints and has been operating above part 15 limits. The FCC ignores complaints. That's the truth.
There's a small problem of accuracy with the claims being made by the BPL vendors. Some claim there are thousands of users. Some claim there are thousands of homes. The truth is it's not nearly as widespread as they would have you believe. There are pockets of it in dense areas. But does that mean subscribers? No. Idle systems do not generate noise.
Believe me, those that are hearing it are complaining. I've seen the complaints. |
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markopoleo
join:2003-04-02
Bonne Terre, MO | Actually you have a fact messed up, not many complaints have been in trial areas. I know for a fact one near me did not have a single complaint from its BPL trial. |
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rf_engineer
join:2003-08-04
USA | »www.arrl.org/~ehare/bpl/NPRM_hyp···#Reports |
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RFZOT
join:2005-03-12
Australia
| reply to markopoleo
Well at the Queanbeyan Trials in N.S.W. the interference was extremely strong. In fact NO OTHER signals could be copied.
It was a total wipeout. I did not even hear the Naval station
which is only a few miles away. Of course it may not have been transmitting, but Radio Australia on 6 Mhz was not heard either. No amateur signals on any of the bands could be coipied. Nothing, absolutely nothing, except the masses of carriers of the ODFM BPL was heard.
Incidently those who started discussing AC & DC should at least get some basic knowledge before jumping into debates like this.
Radio Frequency Zero Order Tank |
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