EC8491 Question Bank Communication Theory
EC8491 Question Bank Communication Theory Regulation 2017 Anna University free download. Communication Theory Question Bank EC8491 pdf free download.
Sample EC8491 Question Bank Communication Theory
(i) Outline the function of switching modulator in the
generation of AM signal. (7)
(ii) The tuned circuit of the oscillator in a simple AM
transmitter employs a 40μH coil and 12nF capacitor. If the oscillator output is modulated by audio frequency of 5KHz, what are the lower and upper sideband frequencies and the bandwidth required. EC8491 Question Bank Communication Theory
(i) Demonstrate the concepts of envelope detection for demodulation of AM and explain its operation. (7)
(ii)Illustrate non coherent tuned radio frequency receiver.
Give main idea about super heterodyne receiver with neat block diagram and explain the various parameters. (13)
Identify the need for carrier suppression in AM system? EC8491 Question Bank Communication Theory
Draw and explain the functioning of such system. (13)
Construct the balanced modulator circuit for the generation of DSB-SC-AM and explain its operation.
How do you examine ring modulator for the generation of DSB-SC signal? (13)
Analyse the significance of SSB-SC and elaborate in detail about filter method of suppression of unwanted sidebands. (13)
i) Assesss the generation of SSBSC signal using phase shift method. (7)
ii) How would you generate SSB using Weavers method? Illustrate with a neat block diagram.
i) An audio frequency signal 10sin2П*500t is used to
amplitude modulate a carrier of 50sin2П*105t. Calculate modulation index, amplitude of each sideband frequencies, bandwidth and total power delivered to the load of 600Ω. (7)
ii) Discuss on pre-envelope and complex envelope. (6) EC8491 QB Communication Theory
| Subject name | Communication Theory |
| Semester | 4 |
| Subject Code | EC8491 |
| Regulation | 2017 regulation |
EC8491 Communication Theory Question Bank Click Here To Download
EC8491 Syllabus Communication Theory
EC8491 Notes Communication Theory