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Wireless Microphone Issues

Wireless Microphone Issues. Presented By Tom Smith WHA-TV Engineering Department SBE Chapter 24 Frequency Coordinator . Wireless Microphone Issues. DTV Post Transition: Clearing 700 MHz Band TV White Space Devices Legal and Illegal Users Refarming of TV Band For Wireless.

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Wireless Microphone Issues

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  1. Wireless Microphone Issues Presented By Tom Smith WHA-TV Engineering Department SBE Chapter 24 Frequency Coordinator

  2. Wireless Microphone Issues DTV Post Transition: Clearing 700 MHz Band TV White Space Devices Legal and Illegal Users Refarming of TV Band For Wireless

  3. DTV Post Transition Issues Channel Changes By TV Broadcasters Clearing of 700 MHz Band

  4. TV Channel Changes By Broadcasters This should have been completed as stations have been operating on DTV Channels since 2002 or earlier

  5. TV Channel Changes By Broadcasters Some Stations Changed Their DTV Channels Between February 17th and June 12th. If you are experiencing interference issues, you may be on one of those channels.

  6. Clearing Of 700 MHz Band FCC Has Auctioned Off Most of Channels 51-69 for Wireless Use Channels 62, 64, 68 and 69 are Reserved for Public Safety All TV stations and Broadcast Auxiliary users have to vacate the Band

  7. Next Step For Wireless Microphone Users FCC Ordered all Manufacturers to cease manufacturing, importing and selling of units on channels 51-69 in Fall of 2008 FCC has not issued a rulemaking requiring users to cease operation on channels 51-69

  8. Next Step For Wireless Microphone Users Wireless Auction Winners want wireless Microphones off these channels by February 17, 2010 or at the start of their operations in a market. Wireless microphone users groups would like up to 2 years to clear band, maybe as late February 17, 2012

  9. Next Step For Wireless Microphone Users As we don’t know when the FCC will rule or how long they will give, it is best to budget and start the purchase process as soon as possible if you are on the affected channels.

  10. TV White Space Issues On November 4, 2008, the FCC issued a rulemaking allowing unlicensed broadband systems to share the TV broadcast Band. These TV Broadband Devices can be WiMax data transmitters or other computer data or media devices.

  11. TV White Space Issues The National Association of Broadcasters, the Association for Maximum Service Television, ESPN, all of the pro sports leagues and the Broadway theater operators have filed lawsuits asking that the rulemaking be overturned.

  12. TV White Space Issues Two types of systems will be allowed. One will be a high power transmission system that will cover several square miles. The second system will be a low power system that will provide coverage over short distances such as in a home or office

  13. TV White Space Issues Wide area transmission systems can operate with 4 watts at up to 30 meters in height on 2nd adjacent or greater from an occupied TV stations channel Personal return units and private networks can operate with 100 milliwatts on the same channels and 40 milliwatts on channels adjacent to TV stations

  14. TV White Space Issues TV White Space Devices must have access to data base in order to find an open channel to operate on. They will be required to check that database when beginning to operate and at regular intervals when in operation. When the technology is operational, listen before transmit will be allowed

  15. TV White Space Issues Besides TV stations and licensed broadcast auxiliary users, the big issue now is what other wireless microphone users can be placed on the database.

  16. Legal and Illegal Users One of the Issues in the TV White Space Rulemaking was unlicensed users. White Space Proponents considered unlicensed users as squatters that would prohibit their use of the TV bands and asked that they receive no interference protection.

  17. Who is a Legal User According to the FCC rules, the only persons that can use wireless microphones in the TV or other aural broadcast auxiliary bands are those that are eligible for a license

  18. Who is a Legal User Out of all of the broadcasters, TV and motion picture producers, networks and cable programmers, there are less than a thousand licensed wireless microphone users.

  19. Who is a Legal User Sec. 74.801 Definitions. Cable television system operator. A cable television operator is defined in Sec. 76.5(cc) of the rules. Low power auxiliary station. An auxiliary station authorized and operated pursuant to the provisions set forth in this subpart. Devices authorized as low power auxiliary stations are intended to transmit over distances of approximately 100 meters for uses such as wireless microphones, cue and control communications, and synchronization of TV camera signals. Motion picture producer. Motion picture producer refers to a person or organization engaged in the production or filming of motion pictures. Television program producer. Television program producer refers to a person or organization engaged in the production of television programs. Wireless assist video device. An auxiliary station authorized and operated by motion picture and television program producers pursuant to the provisions of this subpart. These stations are intended to transmit over distances of approximately 300 meters for use as an aid in composing camera shots on motion picture and television sets. .

  20. Who is a Legal User Sec. 74.832 Licensing requirements and procedures. (a) A license authorizing operation of one or more low power auxiliary stations will be issued only to the following: (1) A licensee of an AM, FM, TV, or International broadcast station or low power TV station. Low power auxiliary stations will be licensed for used with a [[Page 503]] specific broadcast or low power TV station or combination of stations licensed to the same licensee within the same community. (2) A broadcast network entity. (3) A cable television system operator who operates a cable system that produces program material for origination or access cablecasting, as defined in Sec. 76.5(r). (4) Motion picture producers as defined in Sec. 74.801. (5) Television program producers as defined in Sec. 74.801. (6) Licensees and conditional licensees of stations in the Service and Multichannel Multipoint Distribution Service as defined in Sec. 21.2 of this chapter, or entities that hold an executed lease agreement with an MDS or MMDS licensee or conditional licensee or with an Instructional Television Fixed Service licensee or permittee

  21. Who is a Legal User Sec. 74.802 Frequency assignment. Frequencies within the following bands may be assigned for use by low power auxiliary stations: [[Page 502]] 26.100-26.480 MHz 54.000-72.000 MHz 76.000-88.000 MHz 161.625-161.775 MHz (except in Puerto Rico or the Virgin Islands) 174.000-216.000 MHz 450.000-451.000 MHz 455.000-456.000 MHz 470.000-488.000 MHz 488.000-494.000 MHz (except Hawaii) 494.000-608.000 MHz 614.000-806.000 MHz 944.000-952.000 MHz

  22. What’s left for Everyone Else (b) The following frequencies are available for wireless microphone operations to eligible's in this part, subject to the provisions of this paragraph: Frequencies (MHz) 169.445, 171.045, 169.505 , 171.105, 170.245, 171.845 170.305, 171.905 (1) The emission bandwidth shall not exceed 54 kHz. (2) The output power shall not exceed 50 milliwatts. (3) The frequency stability of wireless microphones shall limit the total emission to within <PLUS-MINUS32.5 kHz of the assigned frequency. (4) Wireless microphone operations are unprotected from interference from other licensed operations in the band. If any interference from wireless microphone operation is received by any Government or non- Government operation, the wireless microphone must cease operation on the frequency involved. Applications are subject to Government coordination.

  23. What can be done for the current ineligible users left A number of comments in the TV white space rulemaking asked that the FCC deal with the ineligible users of wireless mikes. They included the wireless microphone manufacturers, users, public interest groups and some from the computer industry.

  24. What can be done for the current ineligible users left A number of comments from the proponents of the use of TV white spaces asked that that FCC prohibit the use of the TV band by those ineligible for a licenses as this would restrict their access to the band.

  25. What can be done for the current ineligible users left On August 25th, the Association for Maximum Service Television (MSTV) proposed that the FCC allow theaters, live music producers, government bodies and houses of worship to obtain license to operate wireless microphones under part 74 of the FCC rules.

  26. Refarming the TV Band for Wireless As part of it’s inquiry into the future of broadband, the FCC issued a notice of inquiry asking for input on the future use of radio spectrum for wireless including asking what spectrum would be needed and where it would come from.

  27. Refarming the TV Band for Wireless On October 23rd, the Consumer Electronics Association released a paper suggesting that TV spectrum was too valuable to used for TV broadcasting. Many comments appeared in print that supported the proposal.

  28. Refarming the TV Band for Wireless The NAB and the MSTV meet with Blair Levin, the FCC’s broadband advisor who suggested possibly reducing all TV broadcasts to one SD multicast channel.

  29. Refarming the TV Band for Wireless Congress is requiring the FCC to release the results of their broadband inquiry by February 17, 2010. Their plans for the future uses of the TV band will become known at that time.

  30. SBE Frequency Coordination Program Maintains databases of broadcast auxiliary frequencies to aid local stations and visitors to plan usage. Facilitates dialog between users. Flags possible conflicts . Does not assign frequencies, only helps users select their own.

  31. Thank you Tom Smith tom.smith@wpt.org

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