Both FM radio and television signals rely on both ground waves and direct waves.
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Q20: In radio transmission, _ promises to replace
Q21: This system transmits a digital signal on
Q22: Wavelength is measured as the distance from
Q23: Frequency is expressed in terms of cycles
Q24: When a radio station's carrier wave is
Q26: One solution the FCC uses to reduce
Q27: AM's 10-kHz spacing means that channels extend
Q28: FM channels are twenty times wider than
Q29: The United States television video image is
Q30: TV sets have adequate resolution for use
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