Q. Match the items given in List I and those in List II. Select your answers using the codes given in the question.
| List I | List II |
| Types of analog communication | System bandwidth |
| A. single sideband AM | 1. BW proportional to modulation index |
| B. Wideband FM | 2. BW = 2 x maximum signal frequency, fmax |
| C. Vestigial sideband AM | 3. fmax < BW < 2 fmax |
| D. Double sideband AM | 4. BW = fmax |
Codes: A B C D
(a) 1 4 3 2
(b) 4 1 3 2
(c) 3 4 2 1
(d) 2 1 3 4
Q. Match the items given in List I and those in List II. Select your answers using the codes given in the question.
| List I | List II |
| Coding technique in digital communication systems | Purpose |
| A. Huffman code | 1. Elimination of redundancy |
| B. Error correcting code | 2. Reduces bit rate |
| C. NRZ-coding | 3. Adapts the transmitted signal to the line |
| D. Delta modulation | 4. Channel coding |
Codes: A B C D
(a) 1 2 3 4
(b) 3 4 1 2
(c) 1 4 3 2
(d) 3 2 1 4
Q. Match the items given in List I and those in List II. Select your answers using the codes given in the question.
| List I | List II |
| Modulation | Application |
| A. Wideband FM | 1. mobile communication |
| B. Narrowband FM | 2. Superimposition of binary waveform on carrier |
| C. AM | 3. TV video |
| D. VSB-AM | 4. TV audio |
| 5. Medium wave broadcast |
Codes: A B C D
(a) 4 3 5 1
(b) 5 1 2 3
(c) 4 1 5 3
(d) 5 3 2 1
