Gmdss : Element 7 - 51/600
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| Which statement best describes amplitude modulation? |
| A) The character data from the terminal is changed to audio tones. |
| B) The frequency is varied in synchronization with the modulating signal. |
| C) The information signal changes the amplitude but does not change the carrier frequency. |
| D) The amplitude of the carrier is changed but there is still only a single frequency being transmitted. |
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