Extra exam question E1B04
Subelement E1, COMMISSION RULES· Group E1B · 47 CFR §97.303(b)
What must the control operator of a repeater operating in the 70-centimeter band do if a radiolocation system experiences interference from that repeater?
- A.Reduce the repeater antenna HAAT (Height Above Average Terrain)
- B.File an FAA NOTAM (Notice to Air Missions) with the repeater system's ERP, call sign, and six- character grid locator
- C.Cease operation or make changes to the repeater that mitigate the interference (correct answer)
- D.All these choices are correct
WhyA 70 centimeter repeater's control operator who learns the repeater is interfering with a radiolocation system must either cease operation or modify the repeater to eliminate the interference. The 70-centimeter band is shared with radiolocation systems on something less than a fully co-equal basis, so under §97.303(b) a repeater's control operator who learns their repeater is interfering with radiolocation must either stop operating or modify the repeater to eliminate the interference, answer C. There's no FAA NOTAM filing requirement here, that applies to different circumstances involving aviation, and simply lowering antenna height isn't guaranteed to satisfy the rule the way actually resolving the interference does.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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