Discussion
An analog signal carries 4 bits in each signal unit. If 1000 signal units are sent per second, then baud rate and bit rate of the signal are _______ and _______.
Answer: D
The baud rate is the number of signal units per second, so it is 1000 bauds per second. The bit rate is the baud rate multiplied by the bits carried in each signal unit.
\[ \text{bit rate} = 1000 \times 4 = 4000 \text{ bps} \]So the signal has 1000 bauds per second and 4000 bps. The options giving 4000 bauds, 2000 bauds or a bit rate smaller than the baud rate are wrong, because with 4 bits per signal unit the bit rate must be four times the baud rate.
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