[PDF]Syllabus of PWD Engineering Assistant Electronics|Overseer Grade 1 Electronics Syllabus

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DETAILED SYLLABUS FOR THE POST OF ENGINEERING ASSISTANT (ELECTRONICS) /OVERSEER GRADE I (ELECTRONICS)
PUBLIC WORKS DEPARTMENT (ELECTRONICS WING) (Category No:192/2019)

Kerala PSC has announced the detailed syllabus of Overseer Grade 1 Electronics/ Engineering Assistant Electronics in PWD department.

Get the Previous question paper Engineering assistant Electronics HERE

Answer Key of Engineering Assistant HERE

The Syllabus PDF is also given here.

category no : 192/2019

Date of Exam : 15/12/2021

Main Topics for Engineering Assistant Electronics


I.ELECTRONIC DEVICES AND CIRCUITS – 25 marks

II. ELECTRONIC COMMUNICATION – 25 marks

III. SATELLITE COMMUNICATION – 25 marks

IV MOBILE COMMUNICATION – 25 marks

Detailed Syllabus for Overseer Grade 1 Electronics / Syllabus for Engineering Assistant Electronics

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I.ELECTRONIC DEVICES AND CIRCUITS


Diodes: Semiconductors – PN Junction diode – Forward and reverse bias characteristics – specifications – Zener diode – construction and working principle – characteristics – Zener break down – Avalanche break down – Zener diode as a voltage regulator – applications – specifications.


Rectifier:Introduction – Classification of Rectifiers – Half Wave rectifier – Full Wave rectifier – Bridge rectifier – Efficiency – Ripple factor – Applications – Filters – C, LC and PI filters.
Transistor: Transistor as an amplifier –Transistor biasing – Fixed bias, Collector base bias, Self bias – CB, CE, CC Configurations –
Characteristics – comparison between three configurations in terms if
input impedance, output impedance, current gain, voltage gain – RC
coupled amplifier – Load characteristic analysis – Emitter follower and
its applications – Negative feed back – Transistor as a switch.
Transistor oscillator – classifications – condition for oscillation
(Barkhausen criterion) – General form of LC oscillator – Hartley
oscillator – Colpitts oscillator – RC phase shift oscillator , Crystal
oscillator .
Field Effect Transistor: Construction – working principle of FET –
Difference between FET and BJT – characteristics of FET –
specifications – FET amplifier (Common source amplifier), FET as
CHOPPER, UJT – construction – equivalent circuit – operation
-characteristics – UJT as a relaxation oscillator. MOSFET – construction
– characteristics – MOSFET as a switch – CMOS basic concept IGBT –
Basic principle – IGBT as a switch.
Opto – Electronics Devices and Waveshaping Circuits: LDR,
LED, 7 segment LED, LCD, Opto coupler –Opto interruptor – Infrared
transmitter and Receiver – Laser Diode – Solar Cell – Avalanche
Photodiode – Photo transistor. Diode clipper – Types – Clamper
circuits using diode – Voltage doubler – Astable, Monostable and
Bistable operations using Transistor.
Operational Amplifier : Ideal op.Amp – Block diagram and
characteristics – (Minus input follows Plus input and no current through
Minus and Plus input) – Op-amp parameters- CMRR – Slew rate –
Virtual ground – Applications of op-amp-Inverting amplifier – Summing
amplifier – Non inverting amplifier – Voltage follower – Comparator –
Zero crossing detector – Integrator – Differentiator – Op.Amp
specifications. 555 Timer – Functional Block diagram – Astable,
Monostable and Schmitt Trigger – Sequence timer. IC voltage
regulator – 3 pin IC regulators – 78xx, 79xx, LM 317.
D/A Convertor: Basic concepts – Weighted Resistor D/A convertor –
R-2R Ladder D/A convertor – Specification of DAC IC Sampling and
quantization – Analog to digital conversion using Ramp method –
Successive approximation method – Dual slope method, simultaneous
method voltage to frequency convertor – Frequency to voltage
convertor specification of A/D convertor.


II. ELECTRONIC COMMUNICATION


Networks: Symmetrical and asymmetrical networks, characteristic
impedance and propagation constant deviation of characteristic
impedance for T and Pi networks using Zoc and Zsc, image and iterative
impedances – Derivation of Z11 and Z12 for assymetrical T and L Networks
using Zoc and Zsc, Derivation of iterative impedances for assymetrical T
network. Equaliser : Types, applications, constant resistance equalizer. (No
derivations)
Attenuator: types, derivations for elements of symmetrical T and Pi
networks – application.
Filters: types and definitions – derivations for circuit elements and cut off
frequencies of LPF and HPF only. Transmission lines (No equations and
derivations): Transmission line equivalent circuit, primary and secondary
constants, travelling and standing waves, SWR, Wave guides:
types,advantages.
Antennas & Propagation: Basic antenna principle, directive gain,
directivity, radiation pattern, broad-side and end-fire array, Yagi antenna,
Parabolic antenna. Ground wave propagation, space waves, ionospheric
propagation.
Modulation: Electromagnetic Frequency spectrum. Need for modulation,
types of modulation. Amplitude modulation: expression, AM spectrum and
side bands, types of AM – balanced modulator. SSB generation – phase shift
and filter methods, advantages and disadvantages of SSB, AM VSB System.
Diode detector AM Transmitter : Types of Transmitters, Block diagram –
high level AM transmitter and low level AM transmitter. SSB transmitter, ICW
and MCW principles . AM receiver: TRF receiver, superheterodyne radio
receiver – explanations of individual stages – AGC types, SSB receiver
Frequency modulation: Expression, wave forms, frequency spectrum ,
effects of noise in FM, comparison of AM and FM, varactor diode modulator.
FM detectors – slope detector, phase discriminator, ratio detector (no
derivation)
FM Transmitters : Direct and Indirect methods – stereophonic FM
transmitter.
FM Receiver : Block Diagram – AFC – Stereophonic FM receiver
Phase modulation: Principles, Phase modulator circuit, comparison
between FM and PM
Pulse modulation: Types, Sampling Theorem, Generation and detection of
PAM, PWM and PPM, PCM – transmitter, receiver, quantizing noise –
companding.
Microphones: Construction and performances of the following microphones:
carbon, condenser, peizo electric, moving coil and velocity ribbon.
Loud Speakers: Constructional details of dynamic cone type, Horn type and
electrostatic loud speakers, woofer, midrange and tweeter ; cross over
network, surround – sound systems
Audio recording and reproduction: Magnetic system – Compact Disc
system – MP3 system – DVD System – stereophonic system – Hi-Fi- system
principles –Dolby – DTS.
Monochrome Television : Scanning principles aspect ratio – composite
video signal – TV standards. TV transmitter – TV receiver.
Colour TV : Principles of Colour Transmission and reception –color CCD
camera. PAL colour TV receiver (IC details not required) Digital Colour TV
receiver LCD display unit – plasma display – principles of Handy Cam , LCD
projector principles of CCTV and Cable TV.
Radar: Fundamentals Basic Radar System – Applications – Radar range
equation – factors influencing maximum range – Target properties – Pulsed
Systems – Basic Pulsed Radar System – Bloc Diagram – Display methods – PPI
display – Automatic target detection. Radio aids to navigation – Direction
finding – Radio ranges – Radio Compass – Radio Telemetry – Instrument
landing system – Ground controlled approach system.
Telephone System : Public Telephone Network –Private Telephone
Network – Electronic switching System –Block Diagram –– Cordless Phone –
Block diagram – Video Phone – Block Diagram- ISDN – Architecture – Features.
Facsimile Communication System: Introduction – facsimile sender –
Cyllindrical scanning – Tape scanning – facsimile receiver – synchronisation –
phasing – Index of Co-operation (IOC) – photographic recording – Direct
recording.
Digital Communication: Fundamental Block Diagram and Basic elements
of digital communication system – Advantages, disadvantages of digital
communication – characteristics of data transmission circuits – Band Width
requirements – speed – Baud rate – Noise – Cross Talk – Distortion – Equalizers
– Echo Compressors.
Digital Codes : Baudot Code – ASCII Code – EBCDIC Code – Error detection
codes – Parity check codes – Redundant Codes – Constant Ratio Codes – Error
correction codes – Retransmission, forward error correcting code – Hamming
Code.
Digital modulation techniques : ASK modulation /demodulation – FSK
modulation / Demodulation – PSK modulation / demodulation – only block
diagram and operation.
Data sets and interconnection: Classification of Modems – Modem
interfacing – serial interface standard.
Optical communication: Optical communication System – Block Diagram –
Need and advantages of optical fibers – principles of light transmission in a
fibre using Ray theory – Single mode fibers – multimode fibers – step index
fibers –graded index fibers (Fabrication details not required) -Attenuation in
optical fibers – Absorption losses, scattering losses, bending losses, core and
cladding losses, Dispersion – material dispersion, Wave guide Dispersion,
Intermodal dispersion – optical sources – LED – semi conductor LASER –
principles – optical detectors – PIN and APD diodes – connectors and splices
Optical cables – couplers – optical transmitter – Block diagram using laser feed
back control circuit – optical receiver – Block diagram using APD – Applications
of optical fibers – civil, Industry and Military applications (with descriptive block
diagram)


III. SATELLITE COMMUNICATION


Satellite System – Kepler’s I, II, II Laws – Orbits –types – Geostationary
synchronous satellites – Advantages – LEO, MEO – Advantages – Apogee –
Perigee – Active and Passive satellite – Earth Eclipse of Satellite – Launching
Orbit – Parabolic reflector antenna – cassegrain antenna. Space segment –
power supply – Attitude control – station keeping – Transponders – TT and C
subsystem – Thermal control – Antenna subsystem. Earth segment – Receive
only Home TV system – Block Diagram – Transmit receive earth station – Block
Diagram . Satellite Services – INTELSAT – GPS – MSAT
IV MOBILE COMMUNICATION
Cellular Telephone – Evolution – Fundamental concepts – simplified cellular
telephone system – frequency reuse – Interference –Co – Channel interference
– Adjacent channel Interference – Improving coverage and capacity in cellular
systems – cell splitting – sectoring – Roaming and Handoff. Satellite multiple
access techniques – TDMA, FDMA, CDMA
Digital Cellular System – Global system for mobile communications (GSM) –
GSM services – GSM System Architecture – Radio subsystem.

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