International short-wave radio stations
A)use multiplexing to increase their range.
B)utilize ground-wave propagation patterns.
C)utilize direct-wave propagation patterns.
D)depend on satellite relays for intercontinental transmission.
E)change frequencies periodically during their broadcast operations.

Question

Quizplus · Accepted Answer

International short-wave radio stations change frequencies periodically during their broadcast operations to adapt to varying propagation conditions and to ensure better reception across different times of the day and night. This practice helps in dealing with the ionospheric changes that affect the transmission paths of shortwave signals.

International Short-Wave Radio Stations