5EC3 TELECOMMUNICATION ENGINEERING

UNIT 1 : TRANSMISSION LINE:

Types of transmission lines, general transmission line equation, line

constant, equivalent circuits, infinite line, and reflection on a line, SWR of line with different type of

terminations. Distortion less and dissipation less lines, Coaxial cables, Transmission lines at audio and

radio frequencies, Losses in transmission line,. Characteristics of quarter wave, half wave and lines of

other lengths,

UNIT 2 :TRANSMISSION LINE APPLICATIONS:

Smith chart and its application. Transmission line

applications, Impedance matching Network. Single & double Stub matching. Measurement of parameters

of transmission line, measurement of attenuation, insertion loss, reflection coefficient and standing wave

ratio.

UNIT 3 : ATTENUATORS & FILTERS:

Elements of telephone transmission networks, symmetrical and

Asymmetrical two port networks. Different Attenuators, p-section & T-section attenuators, stub matching,

Transmission equalizers Filters, constant K-section, Ladder type, p-section, T-section filter, m-derived

filter sections, Lattics filter section.

UNIT 4 : TELEPHONE TRANSMISSION:

Telephone set, Touch tone dial types, two wire/ four wire

transmission, Echo suppressors & cancellors, cross talk. Multi-channel systems: Frequency division &

time division multiplexing.

UNIT 5: AUTOMATIC TELEPHONY & TELEGRAPHY:

Trunking concepts, Grade of service, Traffic

definitions, Introduction to switching networks, classification of switching systems. Principle of Electronic

Exchange, EPABX and SPC Digital telephone Exchange,Numberig Plan, Fascimile services.