What is the most common method of transmitting data emissions below 30 MHz?... - HamTesting.com - Free Amateur Radio Practice Tests

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E2E01 : What is the most common method of transmitting data emissions below 30 MHz?

- DTMF tones modulating an FM signal

- FSK (frequency-shift keying) of an RF carrier

- AFSK (audio frequency-shift keying) of an FM signal

- Key-operated on/off switching of an RF carrier

Correct Answer : FSK (frequency-shift keying) of an RF carrier

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