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T8A05
Which of the following signal types has the narrowest bandwidth?
Pick an answer to check it.
Answer: C. CW
CW has the narrowest bandwidth of these choices, about 150 Hz. It is just a carrier turned on and off. SSB voice needs about 3 kHz, FM voice about 10-15 kHz, and slow-scan TV is wider than CW too.
Tip: Morse code is the skinniest signal.