Do I have to measure radio station signal when I’m JUST swapping out antennas on a cell?
The short answer is yes. You are required to measure the AM station if you add antennas to an existing vertical structure (example: flagpole, watertower, telephone pole, cell tower) or new rawland tower. It is the coax line running up and down the structure that creates re-radiation. Antenna modification can cause signal interference with other systems. The best plan is to measure to verify, though regulations for this requirement are sometimes difficult to interpret. We can help you with these issues. For FCC regulations, see Subart A — AM Broadcast Stations and other FCC rules (links in the right panel).
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