Question

Which of the following is not a Digital Encoding Technique?

(a) NRZ (Non-Return to Zero)

(b) Amplitude Modulation

(c) Manchester

(d) RZ (Return to Zero)

This question was addressed to me in quiz.

The doubt is from Digital Input Output topic in section Arduino Programming of Arduino

Answer 1

The correct option is (b) Amplitude Modulation

Easy explanation: Any digital signal can be defined as a series of 1’s and 0’s. These series may or may not be in a predefined pattern. This can make it very difficult for the receiver to be able to decipher the signal. Thus, the digital coding techniques involve mostly converting a random pattern of 1’s and 0’s into a predefined pattern of a signal which the receiver can decipher easily. Here Amplitude Modulation Technique is an analog modulation technique.