Q. In ______, the change or lack of change in the level of the voltage determines the value of the bit.

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Q. The idea of RZ and the idea of NRZ-L are combined into the ________ scheme.

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Q. The idea of RZ and the idea of NRZ-I are combined into the ________ scheme.

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Q. In _______ encoding, the duration of the bit is divided into two halves. The voltage remains at one level during the first half and moves to the other level in the second half. The transition at the middle of the bit provides synchronization.

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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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