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T8A11
What is the approximate bandwidth required to transmit a CW signal?
Pick an answer to check it.
Answer: B. 150 Hz
A CW signal needs only about 150 Hz. Sending Morse code is just switching a carrier on and off, which takes very little spectrum. 2.4 kHz is about what SSB voice uses.
Tip: CW: 150 Hz, the narrowest mode.