True/False
Indicate whether the sentence or statement is true
or false.
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1.
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A
digital signal can be changed from a 1 to a 0 by noise.
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2.
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The
dynamic range of a digital transmission system depends on the number of bits per
sample.
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3.
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A T-1
cable can be twisted-pair copper wires.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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4.
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The
first digital code was the: a. | ASCII code | c. | Morse code | b. | Baudot
code | d. | none of the
above | | | | |
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5.
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The
Shannon-Hartley theorem is: a. | I = ktB | c. | C = B log2(1 +
S/N) | b. | C = 2B
log2M | d. | SR =
2fmax | | | | |
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6.
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Natural Sampling does not use: a. | a sample-and-hold circuit | c. | a fixed sample rate | b. | true binary
numbers | d. | an
analog-to-digital converter | | | | |
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7.
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The
immediate result of sampling is: a. | a sample alias | c. | PCM | b. | PAM | d. | PDM | | | | |
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8.
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In
DS-1, bits are transmitted over a T-1 cable at: a. | 1.544 MB/s | c. | 56 kb/s | b. | 64
kb/s | d. | 8
kb/s | | | | |
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9.
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"Signaling" is used to indicate: a. | on-hook/off-hook
condition | c. | ringing | b. | busy signal | d. | all of the above | | | | |
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10.
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Compared to standard PCM systems, the quality of the output of a vocoder
is: a. | much
better | c. | about the
same | b. | somewhat
better | d. | not as
good | | | | |
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