Q. ________ provides synchronization without increasing the number of bits.

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Q. Two common scrambling techniques are ________.

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Q. The most common technique to change an analog signal to digital data is called __________.

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Q. The first step in PCM is ________.

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Q. There are three sampling methods: __________.

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Q. ______ finds the value of the signal amplitude for each sample; ____ finds the change from the previous sample.

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Q. While there is (are) only _____ way(s) to send parallel data, there is (are) three subclass(es) of serial transmission.

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Q. In ______ transmission, we send 1 start bit (0) at the beginning and 1 or more stop bits (1s) at the end of each byte.

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Q. In _________ transmission, we send bits one after another without start or stop bits or gaps. It is the responsibility of the receiver to group the bits.

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Q. The ________ mode provides synchronization for the entire stream of bits must. In other words, it guarantees that the data arrive at a fixed rate.

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Q. A _________ digital signal includes timing information in the data being transmitted.

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Q. In decoding a digital signal, the receiver calculates a running average of the received signal power, called the _______.

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Q. The ________ rate defines the number of data elements sent in 1s; the ______ rate is the number of signal elements sent in 1s.

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Q. The signal rate is sometimes called the ____ rate.

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Q. The data rate is sometimes called the ___ rate.

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Q. In a _____ scheme, all the signal levels are on one side of the time axis, either above or below.

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Q. In ______ schemes, the voltages are on the both sides of the time axis. For example, the voltage level for 0 can be positive and the voltage level for 1 can be negative.

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Q. In _____, the level of the voltage determines the value of the bit.

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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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