Q. In ___________ there is always a transition at the middle of the bit, but the bit values are determined at the beginning of the bit. If the next bit is 0, there is a transition; if the next bit is 1, there is none.

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Q. In Manchester and differential Manchester encoding, the transition at the middle of the bit is used for __________.

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Q. The minimum bandwidth of Manchester and differential Manchester is ____ that of NRZ.

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Q. In _______encoding, we use three levels: positive, zero, and negative.

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Q. The _____ scheme uses data patterns of size 2 and encodes the 2-bit patterns as one signal element belonging to a four-level signal.

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Q. The ______ scheme uses three levels (+V, 0, and -V) and three transition rules to move between the levels.

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Q. ______ substitutes eight consecutive zeros with 000VB0VB.

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Q. ______ substitutes four consecutive zeros with 000V or B00V.

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Q. ASK, PSK, FSK, and QAM are examples of ________ conversion.

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Q. AM and FM are examples of ________ conversion.

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Q. In QAM, both ________ of a carrier frequency are varied.

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Q. If the baud rate is 400 for a QPSK signal, the bit rate is ________ bps.

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Q. If the bit rate for an ASK signal is 1200 bps, the baud rate is ________.

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Q. If the bit rate for an FSK signal is 1200 bps, the baud rate is ________.

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Q. If the bit rate for a 16-QAM signal is 4000 bps, what is the baud rate?

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Q. If the baud rate for a 64-QAM signal is 2000, what is the bit rate?

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Q. Given an AM radio signal with a bandwidth of 10 KHz and the highest-frequency component at 705 KHz, what is the frequency of the carrier signal?

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Q. _______ conversion is the process of changing one of the characteristics of an analog signal based on the information in the digital data.

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Q. Which of the following is not a digital-to-analog conversion?

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Q. In ________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remain constant.

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