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ISRO | ISRO CS 2007 | Question 13

  • Last Updated : 21 Jun, 2018

By using an eight bit optical encoder the degree of resolution that can be obtained is (approximately)
(A) 1.8o
(B) 3.4o
(C) 2.8o
(D) 1.4o

Answer: (D)

Explanation: A digital optical encoder is a device that converts motion into a sequence of digital pulses. It is a pulse generator that provides square-wave signals. The disc has 2 channels divided into “n” equal angular intervals where, n is called resolution or number of counts.
Resolution is defined as the smallest discernible quantity.

Resolution = 360/2n = 360/28 = 1.4o

Option (D) is correct.

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