ELECTRONICS & COMMUNICATION ENGINEERING

About Analog Communications lab is completely equipped with the hardware kits. This lab provides the information about the different types of modulators and demodulators used and types of techniques used for the processing of the analog (continuous) signals. The aim of the lab is to understand basic theories of analog communication system and to design and implementation of analog modulator and demodulator and understand the applications of analog modulator and demodulator circuits, and to investigate signals in time and frequency domain. Students construct and analyze circuits on analog communication transmitter and receiver. Students conduct experiments to understand the signals available at different stages of AM and FM receivers. The objective of this course is to familiarize the students with different blocks in digital communication by constructing and then testing different digital modems and codec. List of Equipments

1. DSB/SSB AM Transmitter Trainer (Scientech 2201)
2. DSB/SSB AM Receiver Trainer (Scientech 2202)
3. Frequency Modulation and Demodulation Trainer (Scientech 2203)
4. Project Board (Scientech 2610)
5. PPM Modulation and Demodulation Trainer (NV6577)
6. PWM Modulation and Demodulation Trainer (NV6576)
7. LAN Trainer (Scientech 5002A)
8. Scientech 401 Digital Storage Oscilloscope 50MHz, 50MSa/s
9. Scientech 806 60MHz Cathode Ray Oscilloscope
10. 10MHz Function-Pulse-Data Generator (Scientech 4065)

List of Practicals

1. To study DSB/ SSB amplitude modulation & determine its modulation factor & power in side bands.
2. To study amplitude demodulation by linear diode detector
3. To study frequency modulation and determine its modulation factor
4. To study PLL-565 as frequency demodulator.
5. To study sampling and reconstruction of Pulse Amplitude modulation system.
6. To study the sensitivity, selectivity, and fidelity characteristics of superheterodyne receiver.
7. To study Pulse Amplitude Modulation by using switching method and sample and hold circuit.
8. To demodulate the obtained PAM signal by second order LPF.
9. To study Pulse Width Modulation and Pulse Position Modulation.
10. Design and implementation of FM radio receiver in 88-108 MHz carrier frequency.

About Electronics and Electrical measurements encountered in the microwave region of the electromagnetic spectrum are discussed through microwave measurement techniques. This measurement technique is vastly different from that of the more conventional techniques. The methods are based on the wave character of high frequency currents rather than on the low frequency technique of direct determination of current or voltage. For example, the measurement of power flow in a system specifies the product of the electric and magnetic fields .Where as the measurement of impedance determines their ratio .Thus these two measurements indirectly describe the distribution of the electric field and magnetic fields in the system and provides its complete description. It is useful to measure reflection coefficient, VSWR, matching techniques etc. List of Equipment

1. Microwave Bench
2. Gunn Power Supply NV 101A
3. Klystron Power Supply Nvis 102A
4. Frequency Meter Nvis 205A
5. Variable Attenuator 20dB Nvis 206
6. Isolator Nvis 204
7. Detector Mount Nvis 209
8. Matched Terminator Nvis 212
9. Movable Short Nvis 210
10. SWR Meter Nvis 103A

List of Practicals

1. To study of various microwave components and instruments like frequency meter, attenuator, detector  & VSWR meter.
2. Draw V-I characteristics of microwave source like Gunn diode/ Reflex Klystron.
3. Measurement of frequency and wavelength in a rectangular waveguide.
4. Measurement of VSWR (small as well as large values) & reflection coefficient.
5. Measure unknown impedance with smith chart.
6. Draw the following characteristics of Gunn Diode
   1.  Output power and frequency as a function of voltage.
   2. Square wave modulation by PIN diode.

7. Drawing polar pattern of Horn antenna.
8. To observe the action of directional coupler and its use in separating incident & reflected wave.

About The digital electronics lab enables students to get practical experience in design, realization and verification of Demorgan’s Theorem,  Boolean algebra, combinational circuit design  and sequential circuit design. The students will be able to learn the demonstration of the truth table of various expressions and combinational circuits, verification of logic gates and design, test and evaluate various combinational circuits such as adders, subtractors, comparators, multiplexers and demultiplexers. Construction of flips-flops, counters and shift registers.  Simulate full adder and up/down counters. List of Equipments

1. Universal Gate Trainer
2. TTL Inverter Trainer
3. Multivibrator Trainer Using IC-74121 and IC-74123
4. Adder/Subtractor Trainer Using IC-7483
5. Clocked Circuit Realization Trainer
6. Demultipleaer/Decoder Trainer Using IC-74138
7. Modulo-N Counter Trainer
8. Flip-flop Trainer
9. Shift Register Trainer

List of Practical

1. Bread-board implementation of various flip-flops.
2. Bread-board implementation of counters & shift registers.
3. Determination of Delay time and NAND, NOR, Ex-OR, AND & OR Gates.
4. Design of Counters.
5. Implementation of Arithmetic algorithms.
6. Bread Board implementation of half and full Adder/Subtractor.
7. Transfer characteristics of TTL inverters & TTL Schmitt Trigger inverter.
8. Transfer characteristics of CMOS inverters series and CD-40 series and
9. Estimation of Gate delay of CD-40 series CMOS inverter.
10. Monostable multivibrators using IC-74121 and IC-74123.
11. Clock circuit realization using 555 and CMOS inverter and quartz crystal.
12. Demultiplexer / Decoder operation using IC-74138.

About This laboratory provides the necessary training resources for undergraduate students in Electronic & Communication Engineering to understand complex digital communication systems and its implementation. The career outlets from these degrees vary from industrial to research & development sectors. The objective of this lab is to familiarise students with the rapidly evolving world of modern communications techniques. The equipments used in this lab are PCM kit, Delta modulation kit, ASK, PSK, FSK etc. List of Equipments

1. TDM Pulse Code Modulation Transmitter Trainer(Scientech 2153)
2. TDM Pulse Code Demodulation and Receiver Trainer(Scientech 2154)
3. Sampling and Reconstruction Trainer(Scientech 2151)
4. Delta Modulation and Demodulation Trainer(Scientech 2155)
5. Data Formatting and Carrier Modulation Trainer(Scientech 2156)
6. Data Reformatting and Carrier Demodulation Trainer(Scientech 2157)
7. Scientech 401 Digital Storage Oscilloscope 50MHz, 50MSa/s
8. Scientech 806 60MHz Cathode Ray Oscilloscope
9. 10MHz Function-Pulse-Data Generator (Scientech 4065)

List of Practicals

1. To study sampling and reconstruction of the sampled signal
2. To study modulation and demodulation Delta Modulation(DM) and Adaptive Delta Modulation(ADM).
3. To study different digital modulation scheme.
4. To Study modulation and demodulation of TDM/PCM Transmitter and Receiver.
5. To Study DHSS, FHSS.
6. To Study Error Control Coding technique using MATLAB Simulink.
7. To Study different Line Coding Techniques.
8. To study error detection and correction using Hamming code.

About

Digital Signal Processing Lab is used by electronics and communication students in a course on Digital Signal Processor. The lab has Texas Instruments DSP kits for carrying out various experiments. Software used in digital signal processing lab are MATLAB and LabVIEW. Test and measuring instruments are Digital Storage Oscilloscopes 10MHz, Function/ Pulse Generators 8 MHz and designing of various digital filters.

List of Equipments

1. DSP Starter Kit for TMS 320 C6713
2. Low Distortion Signal Generator
3. Oscilloscope 50MHz Dual Channel Digital Storage
4. Oscilloscope 25MHz Dual Channel Digital Storage
5. Multisim
6. Labview

List of Practicals

1. To study of Sampling & Waveform Generation, Quantization of a analog signal.
2. To study Pulse Coded Modulation(PCM) Techniques.
3. To study Delta modulation and demodulation techniques.
4. To study different Digital Modulation Schemes (ASK, PSK, FSK).
5. To study computation of Discrete Fourier Transform(DFT).
6. To study computation of Fast Fourier Transform(FFT).
7. To study FIR Filter implementation, IIR Filter implementation.
8. Computational Experiments with Digital bank of Filters.
9. Echo Cancellation generation and Filters implementation.

 

About This lab is designed to provide students with fundamental concepts of Electronic Device and Circuits for lab experience. Transient analysis and frequency response of Single and Multistage BJT and FET Amplifier. Study of operation of Oscillators and Waveform generators like Multivibrators and Schmitt trigger. Study of frequency response of Tuned and Feedback Amplifier. Application of simulation tools (PSPICE or Multisim) to understand the circuit characteristics. List of Equipments

1. Low Distortion Signal Generator
2. DC power supply (+/- 12V, 0-30V/2A, +/- 5V)
3. Function Generator (FGL-9)
4. Function Pulse Generator (UFG-10)
5. Log and Antilog Amplifiers Using Operational Amplifiers Trainer
6. Monostable, Bistable and Astable Multivibrator Using Transistor Trainer
7. Distortion Meter SM5027
8. Function Generator Using Operational Amplifier Trainer
9. Low Distortion Audio Signal Generator (OW14D)
10. Distortion Meter (DFM-20)
11. FET Amplifier Trainer
12. Emitter Follower Amplifier Using Darlington Pair
13. Transistor Biasing Circuit Trainer
14. Voltage Comparator Using Zero Crossing Detector Trainer
15. Weinbridge Oscillator Using Op-Amp
16. RC Coupled Amplifier Using BJT

List of Practicals

1. To study single stage common source, common drain and common gate FET amplifier.
2. Design of single stage RC coupled amplifier and design of DC biasing circuit using potential divider arrangement.
3. To study multistage amplifier and estimation of Q-factor and bandwidth.
4. To study common collector configuration using Darlington pair.
5. To study series and shunt feedback amplifier and determination of voltage and current gain.
6. Design of weinbridge and phase shift oscillator on breadboard.
7. Design of hartely and colpitts oscillator on breadboard.
8. To study monostable, bistable and astable multivibrator using transistor.
9. Fabrication of DC unregulated power supply.
10. PCB Lab:
    1. (a) Artwork & printing of a simple PCB.
    2. (b) Etching & drilling of PCB.
    3. (c) Testing of power supply fabricated in Experiment No. 6
    4. (d) Mini Project.

About PCB Design has been working to transform Engineering education in India from theoretical and practical teaching to the collaboration gives opportunities to develop the students, researchers etc. Teachers and students in some cases have started working on patents and research for Product Development. PCB Lab provides hand-on experience in PCB Circuit design using software and to familiarize with PCB Fabrication process. It experiences in assembly and Testing of electronics circuit List of Equipments

1. PCB Design Software (TINA)
2. ELVIS Board
3. PCB Artwork File
4. Proto Dye Developer (2 in 1 Unit)
5. Dip Coating m/c Dipcoater
6. Double Sided U.V Exposure
7. PCB Etching Machine
8. PCB Drilling Machine
9. Roller Tinning Machine(RTM 10)
10. Dry Film Laminator
11. Ammonical Etching Machine
12. PCB Shearing Machine

List of Practicals

1. Three stages RC coupled common emitter amplifier and its testing for various parameters.
2. Designing of Phase shift and Hartely Oscillators for variable frequency generation.
3. Testing and designing of Class-A and Class-B push-pull amplifier.
4. Testing and designing of Tuned amplifiers.
5. Testing and designing of A to D and D to A convertor.
6. Testing and designing of any Modulator and Demodulator Circuit.