INTEGRAL UNIVERSITY
(EC-801)TV & SATELLITE COMMUNICATION
QUESTION BANK
Q1). a).Draw the basic block diagram of monochrome television system and explain its working.
b). How the scanning is being done in TV transmission and reception? Explain it.
c). Draw and explain the block diagram of a colour television system.
Q2). Differentiate between a colour receiver and black & white receiver. Explain why
separatecolour sync pulses are needed in a CTV system.
Q3). What do you understand by resolution or kell factor? How does it affect the vertical
resolution of a television picture? How the vertical resolution increases with the number of
scanning lines?
Q4).What is meant by interlaced scanning? Show that it reduces flicker and conserve
bandwidth.
Q5). What do you understand by composite video signal. Draw a diagram of composite video.
signal with negative polarity for one horizontal scan
Q6). What is vestigial sideband transmission and why is it used for transmission of TV picture
signals.
Q7). With the help of a circuit diagram, explain the operation of a practical diode detector
circuit.
Q8). What do you understand by dark current in the vidicon camera tube. Explain with a suitable
diagram the mechanism by which the video signal is developed from the P-I-N structure of
its target.
Q9). Compare the characteristics of image orthicon, vidicon and plumbicon camera tube.
Q10). Describe the construction and working principle of a monochrome picture tube.
Q11). Draw the block diagram of the picture signal transmission. Why is high level modulation.
not used in a TV transmitter
Q12). Draw the block diagram of a television receiver. Sketch the signal waveform at various
points and indicate the function of each stage briefly.
Q13). What is the function of video detector? Draw a simple diode detector circuit and explain its operation.
Q14). Draw a fully labeled block diagram of a NTSC decoder and explain briefly how chroma.
signal is processed to obtain the original R,G and B colour signals
Q15). Describe the working of a closed circuit TV system. How is a CCTV system different from regular TV broadcast.
Q16). With the help of block diagram, discuss the working of a high definition television(HDTV).
Q17). Explain the various frequency bands used in satellite communication. Compare the merits
and demerits of different bands.
Q18). What are the basic elements of a satellite communication system. Explain with a suitable
block diagram.
Q19). Why the uplink frequency is different from the downlink frequency. Also give the reason to keep higher uplink frequency.
Q20). Explain the Kepler’s law of planetary motion and how are they applicable to the
geostationary satellite.
Q21). What is meant by look angles? Explain them with reference to a geostationary satellite and
earth station.
Q22).Explain how a satellite is placed in to geostationary orbit from earth?
Q23). A Satellite is moving in a circular orbit at a height of 150 km above the surface of earth.
If the radius of earth is 6360 km, determine the orbital velocity and orbital period of the
satellite. (G=6.67×10-11Nm2/kg, M=5.98×1024kg)
Q24). Explain the concept of earth coverage and slant range for geostationary satellite. What
are the maximum values of these parameter.
Q25).A geostationary satellite moving in an equatorial circular orbit is at a height of 35786km
from the earth’s surface. If the radius of the earth is 6378km. Determine the theoretical
maximum coverage angle and maximum slant range.
Q26). Describe telemetry, tracking and command facilities of a satellite communication system.
Do they are a part of space segment or ground segment?
Q27). Briefly describe the three axis method of satellite stabilization.
Q28). What is meant by frequency reuse? Explain it.
Q29). Derive general link equation. Find out the expression for C/N and G/T ratio.
Q30). In a satellite communication link, the uplink carrier to noise ratio(C/N)U is 20 db where
as the downlink carrier to noise ratio(C/N)D is 25 db. Find the link carrier to noise ratio.
Q31). Define the following terms:
a) EIRP b) Saturation flux density
c) Figure of merit d) FM Improvement factor
e) Antenna noise temperature
Q32). Derive a relation for received power, Pr and determine path loss in db in terms of
frequency and other parameters.
Q33). Determine the power received by a satellite located at 40000km from the surface of
earth. Satellite is operating at a frequency of 11 GHz and has EIRP of 21 db W. The gain
of a receiving antenna is 50.5 db.
Q34). Explain principle of FDM/FM/FDMA.Discuss its merits, demerits and applications
also.
Q35). Explain DA-TDMA burst structure. In what way it is different from a simple TDMA
burst structure.
Q36). What is CDMA? In what way is it superior to TDMA? Mention the potential application of CDMA.
Q37). What do you understand by PN sequence? Explain its characteristics in brief.
Q38). Explain elements of satellite communication. Also write advantages and disadvantages of 6/4 Ghz band.
Q39).The apogee and perigee of an elliptical satellite orbits are 3000Km and 200Km. Determine the eccentricity, semi-major axis and semi-minor axis.
Q40).Explain the characteristics of light in brief.