Extra exam question E2A03
Subelement E2, OPERATING PROCEDURES· Group E2A
How is an upload signal processed by an inverting linear transponder?
- A.The signal is detected and remodulated on the reverse sideband
- B.The signal is passed through a nonlinear filter
- C.The signal is reduced to I and Q components, and the Q component is filtered out
- D.The signal is mixed with a local oscillator signal and the difference product is transmitted (correct answer)
WhyAn inverting linear transponder processes an uplink signal by mixing it with a local oscillator and transmitting the resulting difference frequency. An inverting linear transponder processes an uplink signal by mixing it with a local oscillator and transmitting the difference product, which is what produces the spectrum inversion between uplink and downlink, answer D. It isn't detected and remodulated the way a repeater regenerates a signal, it isn't passed through a nonlinear filter, and it isn't broken into I/Q components with one discarded, those describe different kinds of signal processing entirely.
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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