Why does the broadcast schedule list different frequencies at different times? Why not use just one frequency like my local AM station?
The ionospheric propagation conditions change depending on the season, sunspots cycle, and time of day. If a broadcaster used only one frequency, it would only propagate for a portion of the day to any given target area. The frequencies take into accounts all of the mentioned factors as well as the location of the transmitter and the target location of listeners.
Related Questions
- Different frequencies are used at different times of the day. Wouldn’t it be easier to use the same frequency all day like my local AM station?
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