railway RRB JE (CBT I + CBT II) Mock Test 2024 Communication Systems Receivers Pre-Emphasis and De-Emphasis
Which among the following is TRUE with respect to de-emphasis?
1. De-emphasis is a complement of pre-emphasis.
2. It decreases the magnitude of higher frequencies with respect to the magnitude of other lower frequencies.
3. It is used in FM broadcasting.
4. It improves the SNR.
1
1 and 2
2
1, 2 and 3
3
1, 2 and 4
4
2, 3 and 4