Extra exam question E7E07
Subelement E7, PRACTICAL CIRCUITS· Group E7E
What is meant by the term “baseband” in radio communications?
- A.The lowest frequency band that the transmitter or receiver covers
- B.The frequency range occupied by a message signal prior to modulation (correct answer)
- C.The unmodulated bandwidth of the transmitted signal
- D.The basic oscillator frequency in an FM transmitter that is multiplied to increase the deviation and carrier frequency
Why"Baseband" refers to the frequency range occupied by a message signal prior to modulation. Baseband refers to the frequency range occupied by a message signal (like voice audio or data) before it's modulated onto a radio carrier, the original signal content in its unshifted, unmodulated form, answer B. It isn't the lowest frequency band a radio covers, isn't the bandwidth of the already-modulated transmitted signal, and isn't a basic oscillator frequency that gets multiplied up, those are different, unrelated concepts.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
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