Multi-Use Radio Service From Wikipedia, the free encyclopedia (Redirected from Multi-use Radio Service) In the United States, the Multi-Use Radio Service (MURS) is an unlicensed two-way radio service similar to Citizens Band (CB). Established by the U.S. Federal Communications Commission in the fall of 2000, MURS created a radio service allowing for unlicensed (Part 95) operation, with a power limit of 2 watts. The FCC formally defines MURS as a private, two-way, short-distance voice or data communications service for personal or business activities of the general public. MURS stations may not be connected to the public telephone network, may not be used for store and forward operations, and radio repeaters are not permitted. MURS comprises the following five frequencies: Channel Frequency Authorized bandwidth Channel Name 1 151.820 MHz 11.25 kHz N/A 2 151.880 MHz 11.25 kHz N/A 3 151.940 MHz 11.25 kHz N/A 4 154.570 MHz 20.00 kHz Blue Dot 5 154.600 MHz 20.00 kHz Green Dot Channels 1-3 use narrowband Frequency Modulation (2.5kHz deviation). Channels 4 and 5 use wideband FM (5 kHz deviation). MURS falls under part 95 and is not mandated for narrow banding such as those of part 90 in the public service bands by January 2013. Because previous business band licensees who have maintained their active license remain grandfathered with their existing operating privileges, it is possible to find repeaters or other operations not authorized by Part 95 taking place. These are not necessarily illegal. If legal, such operations may enjoy primary status on their licensed frequency and as such are legally protected from harmful interference by MURS users. Restrictions[edit] Transmitter power output is limited to 2 watts. The highest point of any MURS antenna must not be more than 18.3 meters(60 feet) above the ground or 6.10 meters (20 feet) above the highest point of the structure to which it is mounted.[4] Transmitting on MURS frequencies is not allowed while aboard aircraft in flight.[4] When transmitting in Puerto Rico, Desecheo, Mona, Vieques, and Culebra, care must be taken to not interfere with the Arecibo Observatory Devices that use MURS must be specially labeled and certified. [5] Permitted areas of operation[edit] MURS operation is authorized anywhere a CB station is authorized and within or over any area of the world where radio services are regulated by the FCC. Those areas are within the territorial limits of: The fifty United States The District of Columbia Caribbean Insular areas Commonwealth of Puerto Rico Navassa Island United States Virgin Islands (50 islets and cays) Pacific Insular areas American Samoa (seven islands) Baker Island Commonwealth of Northern Mariana Islands Guam Island Howland Island Jarvis Island Johnston Island (Islets East, Johnston, North and Sand) Kingman Reef Midway Island (Islets Eastern and Sand) Palmyra Island (more than 50 islets) Wake Island Aboard any vessel of the United States, with the permission of the captain, while the vessel is traveling either domestically or in international waters.
Posted on: Sun, 02 Feb 2014 21:09:52 +0000
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