[RFI] UK Industry Reaction to the NTIA report
Eric Rosenberg
wd3q at starpower.net
Fri Apr 30 17:22:51 EDT 2004
Reaction to the NTIA report from the May, 2004 newsletter of the United
Telecom Council, the UK's "Telecommunications and Information
Association for Utility, Energy and other Critical Infrastructure
Companies" <http://www.utc.org/>
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<http://www.utctelecom2004.utc.org/> UTC - Your Industry Trade
Association
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NTIA BPL Study Is Good News, Bad News
Late Tuesday, the National Telecommunications and Information
Administration (NTIA) released its study on the interference potential
of broadband over power line (BPL) system operations to federal
government communications in the high frequency (HF) bands. The NTIA
recognizes that President Bush has "established the bold goal of
universal and affordable broadband access for every American by 2007,"
and has called for "technical standards that make possible new
broadband technologies, such as the use of high-speed communications
directly over powerlines." The NTIA study also indicated agreement with
the FCC that BPL can be deployed using the existing emission limits.
But, it states that existing Part 15 measurement guidelines
"significantly underestimate peak field strength," and the study does
"not recommend that the FCC relax the Part 15 field strength limits for
BPL systems."
Instead, NTIA recommended several new measurement guidelines: 1)
measure emissions at power line height; 2) measure at a uniform
distance of 10 meters from the BPL device and power lines; and 3)
measure using a calibrated rod antenna or a loop antenna in connection
with appropriate factors relating magnetic and electric field strength
levels. In addition, the NTIA wants "exceptional protection" (e.g.
notching) for 41 frequencies (4.2 MHz of spectrum total) amounting to
5.4% of the 1.7-80 MHz frequency range in which BPL operates. Finally,
the report recommended that BPL interference can be prevented or
eliminated by mandatory registration of certain parameters of planned
or deployed BPL systems; and by routine use of minimum output power,
using filters and terminations to extinguish BPL signals on power lines
where they are not needed, and judicious choice of BPL signal
frequencies to reduce radiation.
For more information, please contact the UTC Legal/Regulatory
Department.
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