Electronics & Telecommunication Engineering(6th Sem.)
Communication Hardware Design__________________________________1. Unit-1 21/01/2012
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2. Unit-2 21/01/2012
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3. Unit-3 21/01/2012
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4. Unit-4 21/01/2012
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5. Unit-5 21/01/2012
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Communication Hardware Design SyllabusUNIT – I AM Generation: Methods of AM generation: Detailed Analysis of Class - C Tuned Amplifiers Linear shunt plate modulation, Linear series plate modulation, Grid-bias modulation, cathode modulation suppress grid modulation, screen grid modulation, collector modulation. UNIT – II AM Transmitters: Classification of Radio transmitters, Carrier Frequency Requirements, Master Oscillator, frequency Synthesizers, Harmonic Generators, Radio Broadcast Transmitters, Radio Telephone Transmitters, Peak Limiters, Peak Clippers, Volume Compressors, VODAS, Privacy Devices in Radio Telephony, Broad band Techniques, FDM and TDM Hierarchy, SSB Transmitters, Suppression of Radiation from Radio Transmitters. UNIT – III AM Receivers: Classification, Principle of AM Radio Receivers, TRF receivers; Practical TRF Receivers, Super heterodyne Receivers, Characteristics of Ideal Receiving Aerials, Receiving, RF Amplifier Stage, Image Signal Rejection, Receivers Noise, frequency Converter stage, Square LAW and Generalized Conversion Theory‟s, Frequency mixers, Tracking and Alignment of Receivers for single dial Tuning, IF Amplifier, detector and AGC Circuits, Tone Compensated Volume Control, Tuning Control, Band-Spread Tuning. Noise Limiter, AFC, Code Reception, SSB Receivers, Volume Expanders, Diversity Reception- Space and Frequency Diversity MUSA System. UNIT – IV FM Transmitters and Receivers: Classification: Capacitive and Reactance Tube Modulator, Reactance Tube Modulators using RL Circuits, FETS and Transistors, distortion in Reactance Tube Modulators, Reactance Tube FM Transmitters, Pre-emphasis and De-Emphasis Circuits; Frequency Drift and Stabilization techniques, Push-pull reactance Tube Modulation, Armstrong transmitters. Types of Limiters, Classification of FM Detectors -Slope Detector, Stagger Tuned Detector, Center Tuned Discriminator, Design Requirements for Foster Seeley Discriminator, Ratio Detector UNIT – V TV Transmitters and Receivers: Principles of TV: Aspect ratio, Persistence of vision and flicker, vertical and horizontal resolution, scanning, Composite video signal, video and sound modulation, Block diagram of TV transmitter and receiver (Monochrome) |
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