Technician exam question T8B09
Subelement T8, SIGNALS AND EMISSIONS· Group T8B
What causes spin fading of satellite signals?
- A.Circular polarized noise interference radiated from the sun
- B.Rotation of the satellite and its antennas (correct answer)
- C.Doppler shift of the received signal
- D.Interfering signals within the satellite uplink band
WhySpin fading of satellite signals is caused by rotation of the satellite and its antennas. As a satellite tumbles or rotates, its antenna's polarization and orientation relative to the ground station constantly change, periodically weakening the received signal, a pattern called spin fading, answer B. Circular-polarized solar noise (A), Doppler shift (C), and uplink-band interference (D) are all separate phenomena that don't describe this specific antenna-orientation effect.
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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