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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. | ||
== History of the regulation == | |||
=== LPFM Report and Order === | |||
This rule was first enacted in the original ''LPFM Report and Order'' in January, 2000. The original rules included the 10-watt LP-10 service, instituted the 20 kilometer "buffer zone" and did not require the protection of third-adjacent channels. | |||
=== Order on Reconsideration === | |||
In the ''Order on Reconsideration'' enacted September 2000, the rule was clarified to state that LPFM applications during a filing window only need to protect other facilities that were filed prior to the public notice announcing the LPFM filing window. Rules were also clarified to clarify that existing stations would be protected based on standard distances based on their service class. | |||
Due to concerns expressed by interests representing audio services for the blind, the FCC imposed third-adjacent channel spacing restrictions by LPFM stations towards full-service FM stations that were operating radio reading services. | |||
The required distance separations were amended to take into consideration low power FM facilities in Mexico, which were inadvertently left out of the original distance table from the ''Report and Order'' | |||
=== Biennial Regulatory Review-Streamlining of Radio Rules === | |||
Less than a month later, the ''Streamlining Order'' enacted the new C0 class of service. The domestic LPFM distance separation tables were amended to add this new class of service between classes C1 and C. | |||
=== Second Report and Order === | |||
With the enactment of the Radio Broadcast Protection Act of 2001, a part of an appropriations legislation for the District of Columbia, the ''[[Second Report and Order]]'' imposed the requirement that LPFM stations must protect domestic FM facilities on third-adjacent channels. | |||