General exam question G7C01
Subelement G7, PRACTICAL CIRCUITS· Group G7C
What circuit is used to select one of the sidebands from a balanced modulator?
- A.Carrier oscillator
- B.Filter (correct answer)
- C.IF amplifier
- D.RF amplifier
WhyA filter is used to select one of the sidebands from a balanced modulator. After a balanced modulator produces both sidebands around the carrier, a sharp filter tuned to pass just one sideband and reject the other is what actually selects which sideband, upper or lower, goes on to be transmitted, answer B. A carrier oscillator, IF amplifier, and RF amplifier all play other roles in the transmit chain, but none of them is the sideband-selecting element, that's specifically the filter's job.
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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