5EC9 COMMUNICATION LAB-I

1.   Harmonic analysis of a square wave of a modulated wave form.

2.  Observe the Amplitude modulated wave form & measure modulation index. Demodulation of AM

signal.

3.   Generation & Demodulation of DSB – SC signal.

4.   Modulate a sinusoidal signal with high frequency carrier to obtain FM signal. Demodulation of the FM

signal.

5.   To observe the following in a transmission line demonstrator kit :

(a)  The propagation of pulse in non reflecting transmission line.

(b)  The effect of losses in transmission line.

(c)  Transmission with standing waves on a Transmission line.

(d)  The resonance characteristics of a half-wave length long X-mission line.

6.   (a) To observe the operation of sampling and sample & hold circuits.

(b) To study the effect of sampling time (sampling pulse width).

(c) To study the effects of changing the sampling frequency & observing aliasing phenomena.

7.   To study & observe the operation of a super heterodyne receiver.

8.   To study & observe the amplitude response of automatic gain controller (AGC ).

9, 10.  PAM, PWM & PPM: Modulation and demodulation.