General exam question G0A09
Subelement G0, ELECTRICAL AND RF SAFETY· Group G0A
What type of instrument can be used to accurately measure an RF field strength?
- A.A receiver with digital signal processing (DSP) noise reduction
- B.A calibrated field strength meter with a calibrated antenna (correct answer)
- C.An SWR meter with a peak-reading function
- D.An oscilloscope with a high-stability crystal marker generator
WhyA calibrated field strength meter with a calibrated antenna can be used to accurately measure RF field strength. Accurately measuring RF field strength requires an instrument specifically built and calibrated for that purpose, a calibrated field strength meter paired with a calibrated antenna, so the reading can be trusted against a known reference, answer B. A DSP-equipped receiver, a peak-reading SWR meter, and an oscilloscope with a crystal marker generator are all useful pieces of station test equipment, but none of them is a calibrated instrument for measuring absolute RF field strength, so A, C, and D are wrong.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.
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