Laboratory Experiments
PART-A:Expt.l to Expt. 5 have to be performed using discrete components.
1. Amplitude Modulation and Demodulation: i) Standard AM, ii)DSBSC (LM741 and LF398 ICs can be used)
2. Frequency modulation and demodulation ( IC 8038/2206 can be used)
3. Pulse sampling, flat top sampling and reconstruction
4. Time Division Multiplexing and Demultiplexing of two bandlimited signals.
5. FSK and PSK generation and detection
6. Measurement of frequency, guide wavelength, power, VSWR and attenuation in microwave test bench.
7. Obtain the Radiation Pattern and Measurement of directivity and gain ofmicrostrip dipole and Yagi antennas.
8. Determination of
a Coupling and isolation characteristics ofmicrostrip directional coupler.
b. Resonance characteristics of microstrip ring resonator and computation of dielectric constant of the substrate.
c. Power division and isolation of microstrip power divider.
PART-B: Simulation Experiments using SCILAB/MATLAB/Simulink or LabVIEW
1. To Simulate NRZ, RZ, half-sinusoid & raised cosine pulses and generate eye diagram for binary polar signaling.
2 Pulse code modulation and demodulation system.
3. Computations of the Probability ofbit error for coherent binary ASK, FSK and PSK for an AWGN Channel and compare them with their performance curves.
4. Digital Modulation Schemes i) DPSK Transmitter and Receiver, ii)QPSK Transmitter and Receiver.
Course Outcomes:
On the completion of this laboratory course, the students will be able to:
1. Design and test circuits for analog modulation and demodulation schemes viz., AM, FM, etc.
2. Determine the characteristics and response of microwave waveguide.
3. Determine characteristics ofmicrostrip antennas and devices & compute the parameters associated with it.
4. Design and test the digital and analog modulation circuits and display the waveforms.
5. Simulate the digital modulation systems and compare the error performance ofbasic digital modulation schemes.
Conduct of Practical Examination: