General exam question G8B13
Subelement G8, SIGNALS AND EMISSIONS· Group G8B
Which of the following is an odd-order intermodulation product of frequencies F1 and F2?
- A.5F1-3F2
- B.3F1-F2
- C.2F1-F2 (correct answer)
- D.All these choices are correct
Why2F1-F2 is an odd-order intermodulation product of frequencies F1 and F2. Odd-order intermodulation products follow the pattern of odd integer multiples combining, and 2F1-F2 fits that pattern (2 plus 1 is an odd total order, third-order), landing close to the original frequencies, answer C. 5F1-3F2 (eighth order, even) and 3F1-F2 (fourth order, even) are both even-order products, not odd, so they don't fit, and since A and B don't qualify, D's "all of these" is wrong too.
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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