Technician exam question T7A03
Subelement T7, PRACTICAL CIRCUITS· Group T7A
Which of the following is used to convert a signal from one frequency to another?
- A.Phase splitter
- B.Mixer (correct answer)
- C.Inverter
- D.Amplifier
WhyA mixer is used to convert a signal from one frequency to another. A mixer combines an incoming signal with a locally generated frequency to produce a new signal at a different, shifted frequency, the core process behind superheterodyne receivers and many transmitters, answer B. A phase splitter (A) divides a signal into phase-shifted copies rather than shifting frequency, an inverter (C) flips a signal's phase or polarity, and a plain amplifier (D) increases a signal's amplitude without changing its frequency.
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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