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American Radio Relay League

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

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American Radio Relay League

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

  2. Broadband Over Power Line (BPL) and Radio Services Ed Bruette, N7NVPARRL Section Manager - Western WAWA State RACES Officer P.O. Box 73Silverdale, WA 98383-0073n7nvp@arrl.org360-698-0917 Ed Bruette, N7NVP WWA Section Manager, ARRL

  3. BPL Ed Bruette, N7NVP WWA Section Manager, ARRL

  4. PLC? Ed Bruette, N7NVP WWA Section Manager, ARRL

  5. 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

  6. 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

  7. 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

  8. 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

  9. ARRL Comments • 120 page FCC comment filing • Contained antenna modeling and calculations of interference potential Ed Bruette, N7NVP WWA Section Manager, ARRL

  10. 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

  11. 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

  12. 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

  13. Potential Spectrum Loss Ed Bruette, N7NVP WWA Section Manager, ARRL

  14. 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

  15. 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

  16. 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

  17. A Power Line • Is unshielded • Is an antenna! • Transmit • And receive! Ed Bruette, N7NVP WWA Section Manager, ARRL

  18. 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

  19. Basic ??? Ed Bruette, N7NVP WWA Section Manager, ARRL

  20. Basic HF Antenna Ed Bruette, N7NVP WWA Section Manager, ARRL

  21. Antenna With Gain Ed Bruette, N7NVP WWA Section Manager, ARRL

  22. 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

  23. 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

  24. Video Ed Bruette, N7NVP WWA Section Manager, ARRL

  25. Ed Bruette, N7NVP WWA Section Manager, ARRL

  26. 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

  27. 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

  28. 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

  29. 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

  30. 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

  31. 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

  32. 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.”

  33. Amateur Radio Research and Development Corporation Field Testing

  34. 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

  35. 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

  36. 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

  37. 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

  38. More InformationEd Hare, W1RFIARRL Laboratory Manager225 Main StNewington, CT 06111w1rfi@arrl.org860-594-0318 • 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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