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سؤال 347

What is CW?

  1. A type of electromagnetic propagation
  2. A digital mode used primarily on 2-meter FM
  3. Error correction for digital transmission using code words
  4. Another name for a Morse code transmissionپاسخ درست

توضیح

CW stands for continuous wave, an unmodulated carrier switched on and off, and in practice that keying spells out Morse code, so CW is the common name for Morse code transmission. It is a mode of emission, not a form of propagation or an error-correction scheme.

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