A signal has eight data levels with a pulse duration of 1 ms. What is the bit rate ?

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ESE Electrical 2021 Official Paper
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  1. 1000 bps
  2. 2000 bps
  3. 3000 bps
  4. 4000 bps

Answer (Detailed Solution Below)

Option 3 : 3000 bps
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Detailed Solution

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Formula Used:

Symbol Rate = \(\frac{1}{PD}\) (Here, PD is pulse duration)

Also, Symbol Rate = \(\frac{BR}{log_2M}\) (Here, BR is bit-rate & M is data level)

Application:

Given,

PD = 1 m-sec

Hence, Symbol Rate = 1/1m = 1000 symbols/sec

M = 8

From above concept,

BR = Symbol rate × log2M = 1000 × log28 = 1000 × 3 = 3000 bps

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