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American Radio Relay League. The National Association for Amateur Radio When All Else Fails . . . Amateur Radio.

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american radio relay league

American Radio Relay League

The National Association for Amateur Radio

When All Else Fails . . . Amateur Radio

slide2
Broadband Over Power Line (BPL) and Radio Services Ed Bruette, N7NVPARRL Section Manager - Western WAWA State RACES Officer P.O. Box 73Silverdale, WA [email protected]

Ed Bruette, N7NVP

WWA Section Manager, ARRL

slide3
BPL

Ed Bruette, N7NVP

WWA Section Manager, ARRL

slide4
PLC?

Ed Bruette, N7NVP

WWA Section Manager, ARRL

fcc notice of inquiry
FCC Notice of Inquiry
  • On April 28, 2003, the FCC released an NOI requesting comments and reply comments on primarily technical issues regarding BPL. The FCC sought information and data on the relevant technology.
  • In addition, the FCC sought comment on whether it should change the part 15 rules, 47 CFR § 15, to allow for the legal and feasible deployment of BPL.

Ed Bruette, N7NVP

WWA Section Manager, ARRL

fcc notice of inquiry6
FCC Notice of Inquiry
  • FCC asking how BPL should be regulated
  • Industry wants to increase limits
  • Present limits already too high
  • ARRL has filed extensive technical comments!
  • Over 5100 comments filed!

Ed Bruette, N7NVP

WWA Section Manager, ARRL

american public power assoc
American Public Power Assoc.
  • 'Given the tremendous potential of BPL to provide an advanced technology that utilizes additional facilities based mechanisms for providing services the burden should be imposed on challengers to BPL to demonstrate interference in a fact based, empirical proof.

Ed Bruette, N7NVP

WWA Section Manager, ARRL

appa cont
APPA (cont.)
  • Further, to the extent that interference is demonstrated, there should be an attempt to accommodate BPL, even if it means that existing communications providers may have to share or transfer bandwidth.'

Ed Bruette, N7NVP

WWA Section Manager, ARRL

arrl comments
ARRL Comments
  • 120 page FCC comment filing
  • Contained antenna modeling and calculations of interference potential

Ed Bruette, N7NVP

WWA Section Manager, ARRL

arrl reply comments
ARRL Reply Comments
  • 100 page filing contained calculations of conducted emissions that show that the industry wants to have conducted signals up to 58.5 db higher than the present conducted emissions limits
  • That is a power factor increase of 700,000
  • Contained an analysis of the degradation of HF communications by part-15-level signals

Ed Bruette, N7NVP

WWA Section Manager, ARRL

bpl is regulated by fcc part 15
BPL Is Regulated by FCC Part 15
  • Carrier-current must meet limits for intentional emitters
  • Non-interference stipulated in part 15
  • Manufacturer responsible for FCC authorization and maximum limits
  • Operator responsible for harmful interference
  • Both are important to mitigate possible harmful interference

Ed Bruette, N7NVP

WWA Section Manager, ARRL

harmful interference
Harmful Interference
  • Defined as the repeated disruption of radio communications or any disruption of certain emergency communications services
  • From broadband device (BPL) will interfere with entire band(s)!
  • Will occur for entire length of line in areas where access BPL is deployed!

Ed Bruette, N7NVP

WWA Section Manager, ARRL

potential spectrum loss
Potential Spectrum Loss

Ed Bruette, N7NVP

WWA Section Manager, ARRL

bpl could interfere with
Emergency management

National Guard

US Coast Guard

U.S. Military

Fire Departments

Law Enforcement

CAP

FAA

FEMA

NASA

Voice of America

TV stations

Low Power FM Broadcast Stations

BPL Could Interfere With:

Ed Bruette, N7NVP

WWA Section Manager, ARRL

bpl could also interfere with
BPL Could Also Interfere With:
  • Radio astronomy
  • Amateur Radio services
  • Disaster communication networks
  • Land, fixed, mobile services
  • Military affiliate radio systems (army, navy, marine corps, air force)
  • Citizens band

Ed Bruette, N7NVP

WWA Section Manager, ARRL

kitsap co hf vhf users
Annap. Water Dist.

Meteor Comm. Corp.

CK School Dist.

WSDOT

Holroyd Co., Inc.

WA (CemNet)

Kamen Ugidak, Inc.

Yum Restaurant Lic. Corp

WCLA Telecommunications

PSE

McDonalds

Kitsap Co.

B.I. Fire

Mason Co. PUD #1

Kitsap Co. HF/VHF Users

Ed Bruette, N7NVP

WWA Section Manager, ARRL

a power line
A Power Line
  • Is unshielded
  • Is an antenna!
  • Transmit
  • And receive!

Ed Bruette, N7NVP

WWA Section Manager, ARRL

an amateur radio station
An Amateur Radio Station
  • Is licensed by the FCC
  • Has access to various portions of the RF spectrum from 1.8 MHz thru 250 GHz
  • Transmits as much as 1500 W
  • Receives weak signals

Ed Bruette, N7NVP

WWA Section Manager, ARRL

basic
Basic ???

Ed Bruette, N7NVP

WWA Section Manager, ARRL

basic hf antenna
Basic HF Antenna

Ed Bruette, N7NVP

WWA Section Manager, ARRL

antenna with gain
Antenna With Gain

Ed Bruette, N7NVP

WWA Section Manager, ARRL

worldwide problem
Worldwide Problem
  • BPL was extensively studied in Japan and rejected
  • Trials have been done in Europe
  • Multiple interference complaints have been documented

Ed Bruette, N7NVP

WWA Section Manager, ARRL

european field trials
European Field Trials
  • Of 4 trial sites in Austria
  • 2 halted due to modem supplier financial problems
  • 1 stopped due to standards non-compliance
  • More than 70 interference complaints from the 4 trial sites
  • The last site was shut down for interference issues

Ed Bruette, N7NVP

WWA Section Manager, ARRL

video
Video

Ed Bruette, N7NVP

WWA Section Manager, ARRL

slide25
Ed Bruette, N7NVP

WWA Section Manager, ARRL

organizations voicing concern about bpl interference
Organizations Voicing Concern About BPL Interference
  • FEMA
  • NTIA
  • National short-wave listener associations
  • Short-wave broadcasters
  • Electronic-equipment manufacturers
  • GE Medical
  • Aeronautical

Ed Bruette, N7NVP

WWA Section Manager, ARRL

the consumer
The Consumer
  • Consumers probably will not be aware of the documented interference potential
  • Early subscribers may be subjected to needless system problems due to the deployment of technology that has yet to be properly tested

Ed Bruette, N7NVP

WWA Section Manager, ARRL

fema comments
FEMA Comments
  • BPL could "severely impair FEMA's mission-essential HF radio operations in areas serviced by BPL technology."
  • BPL also could render such "essential communications services" as the Radio Amateur Civil Emergency Service (RACES), the Military Affiliate Radio System (MARS) and the Civil Air Patrol (CAP) useless.

Ed Bruette, N7NVP

WWA Section Manager, ARRL

fema cont
FEMA (cont.)
  • "FEMA has concluded that introduction of unwanted interference from the implementation of BPL technology into the high frequency radio spectrum will result in significant detriment to the operation of FEMA radio systems such as FNARS," FEMA's comments assert. "FNARS radio operators normally conduct communications with signals that are barely above the ambient noise levels."

Ed Bruette, N7NVP

WWA Section Manager, ARRL

fema cont30
FEMA (cont.)
  • FEMA said there's no current alternative to HF in terms of meeting national security and emergency preparedness requirements at the national, state and local levels.

Ed Bruette, N7NVP

WWA Section Manager, ARRL

fema cont31
FEMA (cont.)
  • The agency recommended beefing up the FCC's Part 15 rules to ensure no increase in interference levels to existing FCC or NTIA-licensed communication systems, "because any noise increase inevitably would diminish the ability to maintain essential communications," FEMA said, and would "directly impair the safety of life and property."

Ed Bruette, N7NVP

WWA Section Manager, ARRL

ntia comment

NTIA Comment

“Notwithstanding BPL’S Potential Benefits, The Commission Must Ensure That Other Communications Services, Especially Federal Government Operations, Are Adequately Protected From Unacceptable Interference.”

test vehicle
Test Vehicle
  • Transmitter variable from 4 to 500W
  • Vertical antenna on 75, 40, 20, 18, 15, 12 and 10-meters
  • Full sized dipole is more efficient and in the same polarity as a powerline
  • Directional antenna will increase the radius of interference

Ed Bruette, N7NVP

WWA Section Manager, ARRL

curbside testing with pepco
Curbside Testing with PEPCO
  • Data transfer ceased in all but one case at a transmitter power of 4 watts in the BPL operating band of 4 to 21 MHz. (3980, 7150, 14348, 18153 and 21383 kHz.)
  • Higher power levels of 12 and 35 watts caused data transfer to cease in two of the bands tested even though they were above the BPL operating band. (24900 and 28150 kHz.)

Ed Bruette, N7NVP

WWA Section Manager, ARRL

at 0 25 miles data transfer
At 0.25 miles, data transfer:
  • Was in one case, intermittent at 3980 kHz at 120 watts and ceased at 30 watts depending on distance to the local power lines.

Ed Bruette, N7NVP

WWA Section Manager, ARRL

at 0 51 miles data transfer
At 0.51 miles, data transfer:
  • Ceased at 3980 kHz at 100 watts in one case and was unaffected in another.

Ed Bruette, N7NVP

WWA Section Manager, ARRL

slide38
More InformationEd Hare, W1RFIARRL Laboratory Manager225 Main StNewington, CT [email protected]
  • http://www.arrl.org/tis/info/HTML/plc
  • http://www.arrl.org/~ehare/bpl/hyperlinks.html
  • http://www.arrl.org/tis/info/part15.html

Ed Bruette, N7NVP

WWA Section Manager, ARRL

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