Technician exam question T7C06
Subelement T7, PRACTICAL CIRCUITS· Group T7C
T7C06
What does an SWR reading of 4:1 indicate?
- A.Loss of -4 dB
- B.Good impedance match
- C.Gain of +4 dB
- D.Impedance mismatch (correct answer)
WhyAn SWR reading of 4:1 indicates an impedance mismatch. A 4:1 SWR reading indicates a significant impedance mismatch between the antenna system and the feed line, answer D. It isn't expressed as a decibel loss or gain figure (A, C), those are different units entirely, and it's the opposite of a good match (B).
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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