AM Detuning - http://am.sitesafe.com

What are AM Detuning Services?

AM Detuning Services include the assessment and correction of pattern distortion where wireless antenna structures (i.e., towers) can unintentionally interfere with an AM broadcast station's antenna pattern. While wireless signals do not interfere with an AM station's broadcast pattern, towers can cause AM broadcast pattern disturbances. Depending on the proximity to an AM station and the height of the proposed new structure, the structure can intercept a substantial amount of energy from a nearby AM station, re-radiate it, and scatter it in other directions producing unwanted changes in the shape of the AM station's FCC-licensed coverage area.

Regulatory Requirement

The Code of Federal Regulations (Title 47, Volume 2, Part 22, Section 22.371) mandates that any public mobile service licensee that constructs or modifies towers in the immediate vicinity of an AM broadcast station is responsible for measures necessary to correct disturbances to the AM station's antenna pattern. The licensee must:

• Notify the AM broadcast station in advance of planned construction or modification
• Perform field measurements to document due diligence
• Install any required detuning apparatus necessary to restore proper performance of the AM station array
• Provide for continued maintenance and operation of the detuning apparatus