| 1. | The data is imposed on the waves through digital modulation.
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| 2. | All are using different digital modulation schemes from each other.
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| 3. | Modulation order can only be defined for digital modulations.
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| 4. | In digital modulation, an analog carrier signal is modulated by a discrete signal.
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| 5. | This was quickly supplanted by digital modulation methods to achieve even greater spectral efficiency.
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| 6. | Any digital modulation scheme uses a finite number of distinct signals to represent digital data.
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| 7. | The voltage fluctuations are also translated into binary data and used to control digital modulation.
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| 8. | In the case of digital modulation, the carrier f _ c \, is never transmitted.
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| 9. | When the order of a digital modulation approaches infinity its properties approach those of the respective analog modulation.
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| 10. | Furthermore, another digital modulation is line coding, which uses a baseband carrier, rather than a passband wave.
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