Extra exam question E8B10
Subelement E8, SIGNALS AND EMISSIONS· Group E8B
What is frequency division multiplexing (FDM)?
- A.The transmitted signal jumps from band to band at a predetermined rate
- B.Dividing the transmitted signal into separate frequency bands that each carry a different data stream (correct answer)
- C.The transmitted signal is divided into packets of information
- D.Two or more information streams are merged into a digital combiner, which then pulse position modulates the transmitter
WhyFrequency division multiplexing (FDM) divides a transmitted signal into separate frequency bands that each carry a different data stream. Frequency division multiplexing divides a transmitted signal into separate frequency bands, or subcarriers, with each band carrying its own independent data stream simultaneously, answer B. It isn't a signal that jumps between bands over time (that describes frequency hopping instead), isn't packet-based division, and isn't a pulse-position-modulation combining scheme, those describe different multiplexing or spread-spectrum techniques.
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.
Related questions
- E8B01What is the modulation index of an FM signal?
- E8B02How does the modulation index of a phase-modulated emission vary with RF carrier frequency?
- E8B03What is the modulation index of an FM phone signal having a maximum frequency deviation of 3000 Hz either side of the carrier frequency if the highest modulating frequency is 1000 Hz?
- E8B04What is the modulation index of an FM phone signal having a maximum carrier deviation of plus or minus 6 kHz if the highest modulating frequency is 2 kHz?
- E8B05What is the deviation ratio of an FM phone signal having a maximum frequency swing of plus or minus 5 kHz if the highest modulation frequency is 3 kHz?