Gmdss_e3 : Element 3 - 352/605
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| How can a double-sideband phone signal be produced? |
| A) By using a reactance modulator. |
| B) By varying the voltage to the varactor in an oscillator circuit. |
| C) By using a phase detector, oscillator, and filter in a feedback loop. |
| D) By modulating the supply voltage to a class C amplifier. |
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