#### Analog and digital Communication Lab

**Code: EC591 & EC691 Contact
period:3 Credit:2**

**NAME OF THE EXPERIMENTS:**

1. Measurement
of modulation index of an AM signal.

2. Measurement
of output power with varying modulation index an AM signal (for both DSB- &
SSB).

3. Measurement
of distortion of the demodulated output with varying modulation index of an AM

signal (for both DSB-SC & SSB).

4. Measurement
of power of different frequency components of a frequency modulated signal
& the measurement of the bandwidth.

5. Design
a PLL using VCO & to measure the lock frequency.

6. Design
a FM demodulator using PLL.

7. Measurement
of SNR of a RF amplifier.

8. Measurement
of selectivity, sensitivity, fidelity of a superhetrodyne receiver.

9. Study
of waveforms of various functional points (output of RF, IF & video) of a
B/W TV receiver.

10. Study of the vertical & horizontal sweep
of the time base unit of a B/W TV.

11.

Design,
implementation and study of all the properties of 7-length and 15-length pn
sequences

using shift register.

12. Study
of PAM and demodulation.

13. Study
of PCM and demodulation.

14. Study
of line coders: polar/unipolar/bipolar NRZ ,RZ and Manchester.

15. Study
of delta modulator and demodulator.

16. Study
of adaptive delta modulator and demodulator.

17. Study
of BPSK modulator and demodulator.

18. Study
of BFSK modulator and demodulator.

19. Study of ASK modulator and demodulator.

20. Study
of QPSK modulator and demodulator.

**BEYOND SYLLABUS :**

1. Design
of pre-emphasis and de-emphasis circuit. Design a hardware circuit of Amplitude

modulator and
demodulator for baseband signal of 1KHz with carrier signal of 100KHz.

2.

Study of Pulse width Modulation
Technique