Mahatma Gandhi University (MGU) 2007 B.Tech Electronic Instrumentation & Control Engineering communication engineering - Question Paper

COMMUNICATION ENGINEERING
ELECTRONICS AND INSTRUMENTATION
FOURTH SEMESTER

MODULE one
INTRODUCTION
Communication systems-modulation –need for modulation –bandwidth –amplitude modulation-theory-mathematical representation –frequency spectrum-USB & LSB –power relation –frequency modulation –theory –mathematical representation –frequency spectrum –phase modulation –comparison of AM –FM –PM

MODULE 2
RADIO TRANSMITTERS
AM transmitter –block diagram –solid state modulators-circuit explanation –FM transmitter –reactance modulator –varacter diode modulator –am strong modulator

MODULE 3
RADIO RECEVIERS
Tuned radio frequency receiver- superhero dyne receiver –block schematic –selectivity –sensitivity-importance of IF –image frequency rejection –AM receivers-schematic explanation –RF amplifiers –circuit explanation mixer –mixer circuits –IF amplifiers-circuit explanation –simple diode detector –automatic gain control circuit-simple and delayed AGC –FM receivers –block schematic explanation –amplitude limiting –FM demodulators :slope detectors –phase discriminator –radio detectors

MODULE 4
SIDE BAND COMMUNICATION
Single side band transmission –suppression of carrier-balanced modulator –filtering of unwanted sideband –SSB receivers –block schematic explanation –pilot carrier receiver-suppressed carrier receiver –vestigial side band transmission-transmitter and receiver responses –advantages of VSB in television

MODULE 5
Telephone systems-telephone subscribers loop circuit-subscribers line interface circuit –pulse and tone signaling –frequency assignments –electronic telephone –block schematic of a telephone set –block schematic of single analog SLIC board –two wire repeaters-electronic private automatic branching exchange –basic block schematic –power line communication :block schematic explanation –facsimile –FAX transmitter and receiver

REFERENCES

1. ELECTRONIC COMMUNICATION SYSTEMS WAYNE TOMASI
2. ELECTRONIC COMMUNICATION ROODY & COOLEN
3. ELECTRONIC COMMUNICATION SYSTEMS GEORGE KENNEDY
4. ELECTRONIC &RADIO ENGINEERING A.P MATHUR
5. TELEPHONY & CARRIER CURRENT ENGINEERING P.N DAS
6. MODERN COMMUNICATION SYSTEMS COUCH

Earning:   Approval pending.