Gmdss : Element 7 - 53/600
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| Which statement best describes frequency modulation? |
| A) Both the amplitude and frequency are changed by the modulating signal. |
| B) The frequency is changed by the information signal and the amplitude remains unchanged. |
| C) Frequency modulation is subject to interference by atmospheric noise. |
| D) High level mixing of the final amplifier signal and the information signal. |
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