defence exam CRPF ASI Technical Mock Test 2023 Communication Systems Pulse Modulation Pulse Code Modulation (PCM) System
Consider the following:
1. Pulse-position modulation.
2. Pulse-code modulation.
3. Pulse-width modulation.
Which of the above communications are not digital?
1
1 and 2 only
2
2 and 3 only
3
1 and 3 only
4
1, 2 and 3