III B.E. (Information Technology)

V SEMESTER

5 IT 7 COMMUNICATION LAB

1        Harmonic analysis of a square wave of modulated waveform.

2        Observe the amplitude modulated waveform & measure modulation index. Demodulation of the AM Signal.

3        To modulate a high frequency carrier with sinusoidal signal to obtain FM signal Demodulation of FM signal.

4        ,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 half wave length long x-mission line.

6        To study & observe the operation of a superhet receiver.

7        To modulate a pulse carrier with sinusoidal signal to obtain PWM signal & demodulate it.

8        To modulate a pulse carrier with sinusoidal signal to obtain PPM signal & demodulate it.

9        To observe pulse amplitude modulated waveform & its demotion.

10    To observe the operation of a PCM encoder & decoder to sider reason for using digital signal x-missions of analog signals.

11    Produce ASK signals, with and without carrier suppression Examine the different processes required for demodulation in the two cases.

12    To observe the FSK wave forms & demodulate the FSK Signal based on the properties of (a) A tuned circuits (b) on a PLL.