Frank Gentges KØBRA
fgentges at mindspring.com
Tue Jun 24 06:52:48 CDT 2003
Our club president, Paul Rinaldo, W4RI, is off in Geneva at the WARC
conference. Meanwhile, being left alone, AMRAD members are working to
gather some real-world information on BPL.
We are interested in seeing what kind of interference BPL might create. We
are aware of two local communities where BPL tests are underway. They are
Potomac, MD and Manassas, VA. We have located one street address in
Manassas where a user is located.
We are equipping my van with some gear so we can drive around the
neighborhoods which are part of the tests and see what interference we
might be able to observe.
In the van we have:
HP 141T/8553L/8554A spectrum analyzer,
Wandel Golterman AT463 selective voltmeter going to 18 MHz
AMRAD active antenna
Antenna Research Associates ODC-100 calibrated e-field antenna
TenTec RX320 receiver
We hope to find the basic area of the HF spectrum where there are
emissions with the spectrum analyzer. We can measure the narrowband field
strength with the selective voltmeter. Most important, once we know where
to look, we can observe the impact of the interference on a modern HF
receiver with the RX320. Once we have actually done some observations, we
may be coming back to you with questions on our technique. Right now, I am
not sure what questions we have for you.
Right now, we are concerned that the current BPL testing might be limited
to areas with underground power systems. Once the FCC completes its review
the BPL systems might then be deployed in areas with overhead power lines
leaving amateurs in a difficult position of lodging interference complaints
on an "approved" system.
Time is short but we plan to file comments with the FCC and we will be
looking to share them with the ARRL.
We have found your BPL web page useful and your C63 Committee presentation
especially useful. If you have any suggestions or if you become aware of
sites in our area where we can look, please let us know. We are
particularly interested in finding where they are testing with overhead
Frank Gentges KØBRA
<fgentges at mindspring.com>
LF web site at <http://www.amrad.org/projects/lf>
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