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LPFM stations within 125 kilometers (77.6 miles) of the Mexican border are limited to 50 watts effective radiated power in the directions towards Mexico. | LPFM stations within 125 kilometers (77.6 miles) of the Mexican border are limited to 50 watts effective radiated power in the directions towards Mexico. | ||
To determine the the area that requires this protection, plot a 125 kilometer radius around the proposed LPFM station and then draws lines from the LPFM station to all points where the 125 km radius intersects with the border. The area between those two or more lines is the area where the Mexico Strip Zone policies apply. In California, applicants need to be aware that Mexican territory extends into the Pacific Ocean to include the [[wikipedia:Coronado Islands]] located off the coast of the state of [[wikipedia:Baja California]]. | To determine the the area that requires this protection, plot a 125 kilometer radius around the proposed LPFM station and then draws lines from the LPFM station to all points where the 125 km radius intersects with the border. The area between those two or more lines is the area where the Mexico Strip Zone policies apply. In California, applicants need to be aware that Mexican territory extends into the Pacific Ocean to include the [[wikipedia:Coronado Islands|Coronado Islands]] located off the coast of the state of [[wikipedia:Baja California|Baja California]]. | ||
==== Contour requirements ==== | ==== Contour requirements ==== | ||
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=== Caribbean nations === | === Caribbean nations === | ||
For foreign FM stations in the Caribbean region, the FCC does not have any specific bilateral or multilateral agreements with any other nation's administration. Therefore, there are no specific distance separation requirements to other FM facilities outside of the United States territories. | For foreign FM stations in the Caribbean region, the FCC does not have any specific bilateral or multilateral agreements with any other nation's administration. Therefore, there are no specific distance separation requirements to other FM facilities outside of the United States territories. | ||
The assignment of frequencies to LPFM stations in Puerto Rico and the U.S. Virgin Islands are also reported to the International Telecommunications Union's Master International Frequency Register. As a result, LPFM stations, especially those in the U.S. Virgin Islands may receive objections and interference complaints from other nations in the Caribbean region. Such objections and complaints would be lodged through the FCC's International Bureau, which will in turn contact the Media Bureau, which may order the LPFM station to cease operations. LPFM stations in the U.S. Virgin Islands should choose a channel that would not cause interference with FM stations in the [[wikipedia:British Virgin Islands]]. | The assignment of frequencies to LPFM stations in Puerto Rico and the U.S. Virgin Islands are also reported to the International Telecommunications Union's Master International Frequency Register. As a result, LPFM stations, especially those in the U.S. Virgin Islands may receive objections and interference complaints from other nations in the Caribbean region. Such objections and complaints would be lodged through the FCC's International Bureau, which will in turn contact the Media Bureau, which may order the LPFM station to cease operations. LPFM stations in the U.S. Virgin Islands should choose a channel that would not cause interference with FM stations in the [[wikipedia:British Virgin Islands|British Virgin Islands]]. | ||
=== Directional Antennas === | === Directional Antennas === | ||
''Main article: [[Directional Antennas|Directional Antennas]].'' | |||
LPFM stations may use a directional antenna in order to achieve a facility that is compliant with an international agreement. LPFM stations that are using directional antennas solely for that purpose are not required to obtain a proof of performance and verifications from an engineer and a surveyor. Such directional antennas will be protected from FM translators as if they are operating with a nondirectional antenna. | LPFM stations may use a directional antenna in order to achieve a facility that is compliant with an international agreement. LPFM stations that are using directional antennas solely for that purpose are not required to obtain a proof of performance and verifications from an engineer and a surveyor. Such directional antennas will be protected from FM translators as if they are operating with a nondirectional antenna. | ||