1 Modern modulation methods

1.1 Modern modulation methods

1. CSRZ stands for:

a) | |||

b) | |||

c) | |||

d) |

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2. Duobinary Modulation:

a) | |||

b) | |||

c) | |||

d) |

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3. One of the benefits of Returning to Zero in digital modulations is:

a) | |||

b) | |||

c) | |||

d) |

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4. In Carrier-Suppressed Return-to-Zero:

a) | |||

b) | |||

c) | |||

d) |

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5. A transceiver:

a) | |||

b) | |||

c) | |||

d) |

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6. In Alternate Mark Inversion:

a) | |||

b) | |||

c) | |||

d) |

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7. One of the benefits of Alternate Mark Inversion is:

a) | |||

b) | |||

c) | |||

d) |

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8. The principle of Duobinary Modulation is, as follows:

a) | |||

b) | |||

c) | |||

d) |

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9. The principle of BPSK is, as follows:

a) | |||

b) | |||

c) | |||

d) |

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10. The principle of DPSK is, as follows:

a) | |||

b) | |||

c) | |||

d) |

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11. In QPSK:

a) | |||

b) | |||

c) | |||

d) |

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12. In QPSK:

a) | |||

b) | |||

c) | |||

d) |

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13. PDM-QPSK

a) | |||

b) | |||

c) | |||

d) |

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14. PDM-QPSK is a format that is suitable for:

a) | |||

b) | |||

c) | |||

d) |

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15. Coexistence of two systems using different modulations in one fibre:

a) | |||

b) | |||

c) | |||

d) |

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16. Cross Phase Modulation:

a) | |||

b) | |||

c) | |||

d) |

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17. Kerr effect:

a) | |||

b) | |||

c) | |||

d) |

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18. The width of each channel in Orthogonal Frequency Division Multiplexing is:

a) | |||

b) | |||

c) | |||

d) |

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19. VDMT is:

a) | |||

b) | |||

c) | |||

d) |

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20. Which claim referred to VDMT is right?

a) | |||

b) | |||

c) | |||

d) |

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