**EC6501 DC Important Questions**

Anna University Regulation 2013 Electronic Communications Engineering (ECE) EC6501 DC Important Questions for all 5 units are provided below. Download link for ECE 5th SEM EC6501 DIGITAL COMMUNICATION Answer Key is listed down for students to make perfect utilization and score maximum marks with our study materials.

**EC6501 DC Important Questions**

Unit – I

Part A

1. State sampling theorem for low pass signals..

2. Compare uniform and non-uniform quantization.

3. Why is pre-filtering done before sampling?

4. What is natural sampling and flat-top sampling?

5. List out the components required for signal reconstruction

6. Define the term aliasing.

7. Compare DM and PCM.

8. What is meant by quantization?

9. What is the need for non-uniform quantization?

10. State any two non-uniform quantization rules.

11. Define quantization noise power.

12. Define Nyquist rate and Nyquist interval.

13. A signal is sampled at Nyquist rate of 8 KHz and is quantized using 8 bit uniform quantizer. Assuming SNR for a sinusoidal signal, calculate the bit rate, SNR and BW.

14. What is Companding?

15. Write µ-law of compression.

16. What is TDM?

17. Draw the block diagram of TDM.

18. What is the need for synchronization in TDM?

19. Define PAM

20. Write the advantages and disadvantages of TDM.

EC6501 DC All units Important Questions – Download Here

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EC6501 Answer Key, DC Unit wise Important Questions- ECE 5th Semester