One solution the FCC uses to reduce AM co-channel interference during evening hours is to have some stations use lower nighttime power.

Question

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The FCC uses a method known as "power reduction" to combat co-channel interference during nighttime hours. This involves some AM stations reducing their power output at night to lessen the signal overlap with other stations on the same frequency. This helps improve reception for listeners and reduces interference with other stations.

One Solution the FCC Uses to Reduce AM Co-Channel Interference