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Outline the general LED structures for optical fiber communication describing their relative advantages and drawbacks.
What do you mean by the term internal quantum efficiency and external quantum efficiency of the optical source?
Find out attenuation due to fundamental Rayleigh scattering in decibels per kilometer at a wavelength of 0.63ms.
Explain the phenomenon of modal noise in optical fibers and propose how it might be avoided.
Describe absorption losses in optical fibers, comparing and contrasting the Intrinsic and extrinsic absorption methods.
What is the cause of material dispersion and waveguide dispersion? As well describe dispersion-shifted fibers.
Describe what is meant by graded index optical fiber giving an expression for the possible refractive index profile. Point out the main benefit of this kind of fiber with regard to the multimode pro
What do you mean by degenerate modes in the optical transmission?
What are the dimensions of core and cladding in the multimode fibers?
Draw and describe the block diagram of optical communication system.
What is the different computer aided tools for the digital systems.
What is difference between counting sequence of an up-counter and down-counter?
How will you compare component declaration and component instantiation?
What is the basic difference between the encoder and multiplexer?
Write down the VHDL code of S-R flip flop.
Write down truth table, working behavioral/dataflow architecture for the 4-bit comparator. As well draw the circuit and output waveform.
Write down the truth table and VHDL code for the 4-bit left to right shift register. As well draw the circuit and output waveforms.
What is the key difference between sequential and combinational circuits?
Describe with an appropriate diagram the coding procedure in PAL color system. Why the color is burst signal transmitted after each of the scanning line.
Illustrate the limitations of the NTSC system?
Draw a block diagram of the sound channel in a TV receiver. Describe in brief how the inter carrier sound signal as obtained at the video detector, is processed to generate sound output.
Distinguish between the high frequency and low frequency compensation.
Describe the vertical deflection circuits and the procedure of alignment of TV receivers.
What do you mean by image multiplication and signal multiplication in an Image Orthicon camera tube?
Sketch the sectional view of a picture tube which employs electrostatic focusing and electromagnetic deflection and label all electrodes.