railway RRB JE (CBT I + CBT II) Mock Test 2024 Communication Systems Pulse Modulation Delta Modulation (DM)
Which of the followings are digital modulation techniques?
I. SSB-SC
II. PCM
III. Delta Modulation
IV. VSB
1
II and IV only
2
III and IV only
3
I and IV only
4
II and III only