| (a) |
What is a modem?
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[2] |
| (b) |
The diagram below depicts a sine wave. Explain with the aid of diagrams how the signature of this wave can be modified to carry intelligent information using three modulation techniques.In each case,show how the data stream 100110 might be modulated.
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[9] |
| (c) | Explain in detail synchronous and asynchronous transmission. | [4] |
