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Вопрос 122

How does Q65 differ from JT65?

  1. Keyboard-to keyboard operation is supported
  2. Quadrature modulation is used
  3. Multiple receive cycles are averagedПравильный ответ
  4. All these choices are correct

Объяснение

Q65 can accumulate successive receive sequences and average them, so a signal too weak to decode from any single transmission can still be copied after several cycles. Q65 uses 65-tone FSK rather than quadrature modulation, and like JT65 it exchanges structured messages rather than typed text.

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Вопрос 122: How does Q65 differ from JT65? · FCC Amateur Extra Class (Element 4) · Questena