Question Pool -- Category E2D
What is the most common method of transmitting data emissions below 30
MHz?
-
A.
- DTMF tones modulating an FM signal
-
B.
- FSK (frequency-shift keying) of an RF carrier
-
C.
- AFSK (audio frequency-shift keying) of an FM signal
-
D.
- Key-operated on/off switching of an RF carrier
Answer is B.
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