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The conventional 30 Hz reference signal is frequency modulated on a __________ sub carrier.(a) 96 Hz(b) 99,960 Hz(c) 960 Hz(d) 9,960 HzThis question was posed to me in a job interview.The origin of the question is Aviation Communication Systems topic in chapter Aviation Communication Systems of Aircraft Maintenance

Answer»

Correct choice is (d) 9,960 Hz

Easiest EXPLANATION: The conventional 30 Hz REFERENCE signal is frequency modulated on a 9,960 Hz SUB carrier.The omnidirectional signal usually CONTAINS an AMPLITUDE modulated voice channel.



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