SATELLITE COMMUNICATION Question Bank

0

SATELLITE COMMUNICATION Question Bank

SATELLITE COMMUNICATION Question Bank
SATELLITE COMMUNICATION Question Bank


UNIT-I / PART-A


1 What is Satellite?

2 What is the limit of visibility? 

3 State Kepler’s first law.

4 State Kepler’s second law.

5 State Kepler’s third law.

6 Define apogee.

7 Define Perigee. 

8 What are the geostationary satellites?

9 Differentiate geostationary and geosynchronous satellite. 

10 Define ascending node.

11 Define descending node.

12 Define mean anomaly.

13 Define true anomaly.

14 Mention the apogee and perigee height

15 Identify the basic factors affecting satellite position.

16 The limit of visibility depends on what factors? Considering an earth station at the equator, with the antenna pointing either west or east along the horizontal calculate the limiting angle. 

17 Write short notes on station keeping.

18 What is look angle?

19 Write short notes on station keeping.

20 Which parameters decide the system reliability?

21 A satellite moving is orbiting in the equatorial plane with a period from period from perigee to perigee of 12hrs.Given the eccentricity is 0.02. Calculate the semimajor axis. The earth’s equatorial radius is 6378.1414 km.

22 Differentiate ascending node from descending node.

23 Find the viewing angle of a geostationary satellite orbiting at 42000km from an earth station making an elevation angle of 25 degrees.

24 List the differences between LEO and MEO satellites.

25 What are the features of LEO? 

26 Define orbital period.

27 What is prograde orbit direct orbit?

28 What is a geostationary orbit?

29 Distinguish between LEO system and GEO system. 

30 Name the Keplerian element set.

31 What is meant by sun transit outage?

32 A satellite is in an elliptical orbit with eccentricity of 0.6 and perigee altitude 1000 Km. Determine: a) The semi major axis b) The period of revolution

33 Assume a circular orbit: Using Newton’s law of gravitation and Newton’s second law, determine the acceleration of a satellite.


UNIT-I / PART-B


1 Explain how Keplers’s and Newton’s law are used to describe the orbit. Explain about satellite launch vehicles. (Nov/Dec 2019)

2 Describe the terms of earth orbiting satellites. (Apr/May 2016)

3 (a) Define look angle and explain look angle determination in detail. (b) If a satellite is at a height of 36000 km and orbiting in equatorial plane, comment whether the satellite will be under eclipse on equinox days and find the duration of the eclipse. (Nov/Dec 2014)

4 (a) Describe the steps involved in launching a satellite. (Apr/May 2016), (Apr/May 2015) & (Nov/Dec2014). (b) What are the different types of satellite orbits? Discuss their merits and demerits. (Nov/Dec 2014) (Apr/May 2017).

5 A satellite in polar orbit has a perigee height of 600 km and an apogee height of 1200 km. Calculate the mean motion and the rate of regression of the nodes. Assume the polar radius of the earth to be equal to 6357 kms. (Apr/May 2016)

6 (i)State and Explain Kepler’s three laws of motion with suitable diagrams. (April /May 2018)

(ii) A satellite is orbiting in the equatorial plane with a period from perigee to perigee of 12 h. Given that the Eccentricity is 0.002. Calculate the semi major axis. The earth’s equatorial radius is 6378.1414km.

(iii) Write a brief note on Atmospheric drag. (Apr/May 2015). (April /May 2018)

7 Determine the limits of visibility for an earth station situated at mean sea level, at a latitude48.42° north and longitude 89.26° west. Assume a minimum angle of elevation 5°.(Apr/May 2015)

8 (i) Illustrate the orbital parameters used for positioning a satellite. (Nov/Dec 2016)

(ii) Estimate the suitable equations for look angles and the range for geostationary satellite. (Nov/Dec 2016)

9 Derive the equation for a satellite orbit. (Apr/May 2017)

10 Derive the equations which permit the elevation angle to be calculated. (Apr/May 2017)

11 State and explain the parameters for Earth orbiting satellites. (Nov/Dec 2017)

12 Describe in detail the launching procedure of a satellite. (Nov/Dec 2017)

13 What is the principle Liquid Propulsion System? Explain the specific technologies under the category of Electric and ion propulsion. (Nov/Dec 2018)

14 Explain the features of typical satellite launch vehicles. (Nov/Dec 2018)

15 (i) Draw and explain the geometry for determining the sub satellite point.

(ii) Explain and illustrate the limits of visibility in satellite orbits. (April /May 2018)

16 i) Explain the orbital perturbations.

ii) What is meant by the geo stationary orbit and also explain the conditions to be required for an orbit to be geo stationary? (Nov/Dec 2019)

17 Derive the complete expression for Look Angles, along with intermediate angle in satellite communication. Show that intermediate angle is 

18 A satellite is in a circular orbit around the earth. The altitude of the satellite’s orbit above the surface of the earth is 1400 Km. i) What are the centripetal and centrifugal accelerations acting on the satellite in its orbit? Give your answer in m/s2

ii) What is the velocity of the satellite in this orbit? Give your answer in km/s. iii) What is the orbital period of the satellite in this orbit? Give your answer in hours, minutes and seconds. (Apr/May 2021)

19 The state of Virginia may be represented roughly as a rectangle bounded by 39.5° N latitude on the north, 36.5° N latitude on the south, 76.0° W longitude on the east and 86.3° W longitude on the west. If a geostationary satellite must be visible throughout virginia at an elevation angle no lower than 20°, what is the range of longitudes within which the sub-satellite point of the satellite must lie? (Apr/May 2021)

20 A ground station lies at latitude = 39.2906 degrees N and longitude = 280.2629 degrees E. A Geostationary satellite at radius r = 42164 km has a longitude of 280.2629 degrees E. Calculate the range and look angles (azimuth and elevation angles) to the satellite? (Apr/May 2021)


UNIT-II / PART-A


1 Give the two segments of basic satellite communication.

2 Write short notes on altitude control system.

3 What is declination?

4 Formulate uplink and downlink equation of a satellite access

5 Define payload and transponder?

6 Why should an omnidirectional antenna be used aboard a satellite for telemetry and command during the launch phase? 

7 What is meant by Pitch angle?

8 What is a propellant?

9 What is Yaw?

10 What is an zero ‘g’?

11 Write short notes on the spin stabilized satellites.

12 Mention about the functions of AOCs.

13 What is meant by momentum wheel stabilization?

14 Define sky noise.

15 What is the function of Telemetry Tracking and Command (TT&C)?

16 Examine why noise temperature is a useful concept in communication receiver 

17 What is noise weighting?

18 What is an OMT?

19 A satellite downlink at 12 GHz operates with a transmit power of 6W and an antenna gain of 48. 2dB.Calculate the EIRP in dBW

20 What is split body stabilization?

21 Write the objective with the downlink of any satellite communication system must be designed.

22 How do you characterize uplink and downlink?

23 What is the need for thermal control and propulsion?

24 What are the effects to which the displacement in association with tracking feeds gives rise?

25 Why is thermal control necessary in a satellite?

26 Why is the satellite link probably the most basic in microwave communications? 

27 Write the relationship between EIRP and antenna gain?

28 What is the use of frequency reuse technique in communication subsystem and how it is employed?

29 Give the formula for reliability of hardware.

30 What does the term ‘bus’ refer in TT & C?

31 Draw the block diagram of antenna subsystem.


UNIT-II / PART-B


1 Explain about spinning satellite stabilization and momentum wheel stabilization (or) Explain how altitude and orbit control is achieved from a earth station. (or)Explain in detail with necessary schematics the spin stabilization technique and momentum wheel stabilization technique to keep satellites attitude control.(Nov/Dec 2017)

2 Examine how the attitude and orbit control system (AOCS) is achieved through spin stabilization system? Give necessary diagrams. (Nov/Dec 2019)

3 (i) For a satellite circuit the carrier-to-ratio are : uplink 23 dB, downlink 20 dB, intermodulation noise 24dB. Calculate the overall carrier-to-ratio in dBs. Suggest a method to reduce intermodulation noise. (ii) Discuss about the system reliability and design lifetime of the space segment. (Apr/May 2016)

4 i) Justify the reasons behind why the transponders are connected in the communication channel with a neat diagram. (Nov/Dec 2016). ii) Analyze the wideband receiver and input de-multiplexer with appropriate diagrams.

5 From the calculation of system noise temperature prove that C/N ratio is directly proportional to G/T ratio. (Apr/May 2014)&(Nov/Dec 2013)

6 What are the various elements used in the space segments of a satellite system? Explain the need and function of each element in the satellite system. (Nov/Dec 2013)

7 What are the factors contributing to noise in earth station receiving channel? (or)Briefly explain the sources of noise in satellite communication. What is the importance of noise temperature in link design? (Apr/May 2014) & (Nov/Dec 2014)

8 (i) Consider a transmit earth station operating at an uplink frequency of 6 GHz. The antenna diameter is 7 m with efficiency of 60%. The antenna tracking loss and atmospheric attenuation is 1.2dB. The uplink slant range is 37506 km. What is the required output power (dBW) of the HPA system at the antenna feed to provide a 80 dBW/m2 power flux density at the satellite?

(ii) Write a brief note on the communication payload and supporting subsystems. 

9 i) Consider a dual up converter with the following specifications: up link frequency spectrum =14 to 14.5 GHz, First intermediate frequency = 140 MHz, Carrier bandwidth=72 MHz , BPF 1 Centre frequency =1.19 GHz. Determine the first local oscillator frequency, range of second local oscillator frequency, frequency spectrum of unwanted sideband bandwidths of BPF 1 and BPF 2.

(ii)With suitable mathematics explain the design aspects of uplink. (Apr/May 2017)

10 What are the three main systems for tracking satellites? How can tracking systems be affected? What are the main functions of TTC subsystem? Explain. (Apr/May 2017)

11 Discuss on the TWTA power amplifier used in a satellite transponder and its power output. (Nov/Dec 2017)

12 Satellite communication employs electromagnetic waves to carry information between ground and space- Justify. (Nov/Dec 2018)

13 The thermal control system represents a common denominator for all operating elements of the spacecraft- Justify. (Nov/Dec 2019)

14 (i) Describe the East West and North South station keeping maneuvers required in satellite station keeping. (ii) Explain what is meant by satellite attitude and briefly describe two forms of attitude control. (Apr/May 2018)

15 . (i) Explain the working of telemetry, tracking and control with a suitable diagram.

(ii) Explain what is meant by thermal control and why this is necessary in a satellite. (Apr/May 2018) (Nov/Dec 2019)

16 Determine the angle of tilt required for a polar mount used with an earth station at latitude 49deg north. Assume a spherical earth of radius 6371km and ignore earth station altitude. (Nov/Dec 2019)

17 i) Describe about the cascading of amplifiers.

ii) A video signal of bandwidth of 4.2MHz is used to frequency modulate a carrier the deviation ration being 2.56. Calculate the peak deviation and signal bandwidth.

iii) Explain the word redundant in redundant earth station and show this diagrammatically. (Nov/Dec 2019)

18 Define and explain the terms roll, pitch and yaw. (Apr/May 2021)

19 Describe the tracking, telemetry and command facilities of a satellite communications system. Are these facilities part of the space segment or part of the ground segment of the system? (Apr/May 2021)

20 Explain Spin Stabilization and Three-axis Stabilization. (Apr/May 2021)

21 Explain what is meant by thermal control and why this is necessary in a satellite. (Apr/May 2021)

22 Explain what is meant by satellite attitude and briefly describe two forms of attitude control. (Apr/May 2021)


UNIT-III/ PART-A


1 What are the earth station parameters affecting C/N ratio?

2 Why is the cassegrain antenna popular for large earth station.

3 An antenna has a noise temperature of 35K and it is matched into a receiver which has a noise temperature of 100K.Claculate the noise power density and the noise power for a BW of 36MHz.

4 What is terrestrial interface?

5 Define antenna gain. 

6 A satellite downlink at 10 GHz operates with a transmit power of 6 W and an antenna gain of 48.2 dB. Calculate the EIRP in dBW. 

7 What is a single carrier per channel (SCPC)?

8 Write the features of MATV

9 What is outdoor unit?

10 What is LNB?

11 What is the major difference between DBS TV and conventional?

12 TV transmission may be classified as full transponder or half transponder transmission. State what this means in terms of transponder access.

13 State the reason for the high-power amplifier in earth stations deploying some sort of redundancy configuration.

14 What is the basic form of a cassegrain antenna?

15 What is called antenna noise?

16 The range between a ground station and a satellite is 42000 km. Calculate the free space loss a frequency of 6 GHz.

17 What is EIRP?

18 What is noise power spectral density?

19 Define noise factor.

20 Define saturation flux density

21 The range between a ground station & a satellite is 42000km. Calculate the free space loss a frequency of 6GHZ.

22 An antenna has a noise temperature of 35k & its matched into a receiver which has a noise temp of 100k. Calculate the noise power density & the noise power for a BW of 36MHZ.

23 What is TWTA?

24 What is polarization interleaving?

25 What are factors contributing to noise in an earth station receiving channel?

26 List the ionospheric effects on space link.

27 What is MATV and state its purpose?

28 A receiving system has antenna noise temperature of 60K & its receiver noise figure 9dB. Find the system noise temperature if room temperature is 290K.

29 State the basic requirements of an earth station antenna.


UNIT-III / PART-B


1 a) Draw the block diagram and explain TVRO system

b) Explain in detail the test equipment measurement on G/T and C/No. (Nov/Dec2014)

2 a) Explain the earth station transmitter and receiver with necessary block diagram.

b) Explain CATV in detail with neat diagram. (May/June 2015) &(Nov/Dec 2014)

3 Describe and compare the MATV and the CATV systems (May/June 2015) & (November 2013)

4 Explain about uplink satellite circuit &downlink satellite circuit.

5 With a neat block diagram explain the functional elements of a basic digital earth station and also the main elements of a satellite tracking system. (Apr/May 2016)

6 Summarize the procedures involved in test equipment measurements on G/T, C/No and EIRP with reference to the Earth segment (Apr/May 2016)(or)Derive the downlink C/N ratio for the satellite.(Apr/May 2015), (Nov/Dec 2016)

7 a) Explain how intermodulation noise originates in a satellite link and explain how it is reduced? b) Derive the link – power budget equation. (Apr/May 2015), (Nov/Dec 2016)

8 .i)From the calculation of system noise temperature prove that C/N ratio is directly proportional to G/T ratio.

ii)Consider the receive side of an earth station. The antenna gain is 65dB, and its noise contribution is 60 K. The waveguide loss is 0. 5dB.Determine the equivalent noise temperature of LNA assuming that the noise contribution by the down converter is negligible and earth station G/T is 40dB/K.(To =300K) (Apr/May 2017)

9 With test setup explain the procedure of EIRP and antenna gain measurement.

10 i)Illustrate in detail about the free space transmission.

ii)The range between a ground station and a satellite is 42,000 km .Calculate the free space loss at a frequency of 10GHz. (Nov/Dec 2017)

11 Briefly explain in detail the effects of rain in uplink and downlink in satellite communication. (Nov/Dec 2017)

12 State the tropospheric effects on space link. Explain the use of Travelling wave tube amplifier in satellite communication systems. (Nov/Dec 2018).

13 List and explain the steps of Link power Budget analysis for Downlink. (Nov/Dec 2018)

14 . (i) Explain clearly the working of CATV with diagram. (Apr/May 2018)

(ii) In a link budget calculation at 12Ghz the free space loss is 20dB, the antenna pointing loss is 1dB and atmospheric absorption is 2dB. The receiver [G/T] is19.5dB/K and the receiver feeder loss is 1dB. The EIRP is 48dBw. Calculate the carrier to noise power spectral density ratio.

15 Explain in detail about Free space transmission losses, feeder losses and misalignment losses in space link. (Apr/May 2018) (Nov/Dec 2019).

16 In a link budget calculation at 12GHz, the free space loss is 206dB, the antenna pointing loss is 1dB, and the atmospheric absorption is 2dB. The receiver G/T is 19.5 dB/K, and the receiver feeder losses are 1 dB. The EIRP is 48DBW. Calculate the carrier to noise spectral density ratio. (Nov/Dec 2019)

17 i)What is TVRO and explain briefly the home terminal for DBS TV/FM reception.

ii) Derive the power output of earth station HPA. (Nov/Dec 2019)

18 i)An uplink operates at 14GHz, and the flux density required to saturate the transponder is -120dB (W/m2 ). The free space loss is 207dB and the other propagation losses amount to 2dB. Calculate the EIRP required for saturation assuming clear sky conditions. Assume RFL is negligible.

ii) Draw the basic arrangement for the detection of the unique word.

iii)Define EIRP and derive the formula for it in decibels. (Nov/Dec 2019)

19 A certain 6/4 GHz satellite uplink has earth station EIRP is 80 dBW; Earth station

satellite distance is 35780 Km; attenuation due to atmospheric factors is 2 dB; satellite antennas aperture efficiency is 0.8; satellite antennas aperture area is 0.5 m2 ; satellite receivers effective noise temperature is 190 K; satellite receivers bandwidth is 20 MHz. Determine the link margin for satisfactory quality of service if the threshold value of received carrier to noise ratio is 25 dB. (Apr/May 2021)

20 A geostationary satellite transmits 5 W of power with an antenna having a gain of 28 dB. The downlink is operated at 4 GHz and the receive antenna is a dish with diameter of 3.6 m. Compute the EIRP transmitted, and the power received by the receiving antenna. Assume the receiver antenna efficiency to be 0.7 and all the other losses to be 2 dB. (Apr/May 2021).

21 Explain what is meant by saturation flux density. The power received by a 1.8 m parabolic antenna at 14 GHz is 250 pW. Calculate the power flux density (a) in W/m2 and (b) in dBW/m2 at the antenna. (Apr/May 2021)

22 Explain what is meant by input backoff. An earth station is required to operate at an [EIRP] of 44 dBW in order to produce saturation of the satellite transponder. If the transponder has to be operated in a 10 dB backoff mode, calculate the new value of [EIRP] required. (5) iii) Two amplifiers are connected in cascade, each having a gain of 10 dB and a noise temperature of 200 K. Calculate (a) the overall gain and (b) the effective noise temperature referred to input. (Apr/May 2021) 


UNIT-IV / PART-A


1 What is a single mode of operation?

2 What are the methods of multiple access techniques?

3 What is CDMA?

4 Give the types of CDMA.

5 What is a thin route service?

6 Define postamble.

7 What are the advantages of TDMA over FDMA?

8 What is preamble?

9 Define guard time.

10 What is meant by decoding quenching?

11 What are the types of digital speech interpolation?

12 Distinguish centrally controlled random access for satellite access from distributed controlled random access. 

13 How does the spread spectrum system differ from conventional communication systems?

14 What is a single access?

15 What is multiple access technique?

16 Define Multiplexing.

17 What is meant by space division multiple access?

18 What is an error detecting code?

19 What are the limitations of FDMA-satellite access?

20 Write about demand assigned TDMA satellite access.

21 Write about pre-assigned TDMA satellite access.

22 Write the two basic problem in satellite digital transmission. 

23 What is the need of reference burst in TDMA?

24 Distinguish between pre-assigned and demand assigned traffic 

25 Draw the curve for transfer characteristics of TDM.

26 Draw the spectrum of baseband voice signal.

27 What is single channel per carrier? Or Define SCPC.

28 List the features of spread spectrum communication

29 How does a CDMA receiver function for the purpose of synchronization maintenance and reliable data reconstruction?

30 Differentiate multiple access from single access.

31 What is the use of control bits in the data frame?

32 What is the need for burst position synchronization?


UNIT-IV / PART-B


1 Explain the principle behind spectrum spreading and dispreading and how this is used to minimize interference in a CDMA system (May/June 2015)

2 Explain congestion forward error correction and slow start.

3 Compare the features of the various multiple access schemes deployed for satellite access. Compare the salient features of FDMA, TDMA and CDMA. .(Apr/May 2016)

4 a) Identify the band limited and power limited TWT amplifier operation. (Nov/Dec 2016)

b) Explain the operation of digital TASI in TDMA operation (Nov/Dec 2016)

5 a) Express FDMA in detail and also enumerate the interference in FDMA(Nov/Dec 2016)

b) Explain direct sequence spread spectrum communication in details. (Nov/Dec 2016)

6 Analyze the frequency reuse process and give the metrics of spread spectrum communication. (Apr/May2016)

7 Explain in detail about compression and encryption techniques used in satellite communication.

8 Write the design aspects and explain the technical features of TDMA frame structure. (Apr/May 2017)

9 i) Draw the encoder diagram for the following digital signals- Unipolar, NRZ, Polar NRZ, Manchester, Polar RZ for the digital data 1010111.

ii) Write down the advantages of CDMA for satellite networking. (Nov/Dec 2019)

10 In detail explain about the time division multiplexing and bandwidth requirements in a satellite transmission system. (Nov/Dec 2017)

11 Explain in detail the Code division multiple access technique and lists its advantages. (Nov/Dec 2017)

12 Why is CDMA otherwise called spread spectrum communication? How does it differ from FDMA and TDMA? (Nov/Dec 2018)

13 TDMA is a truly digital technology, requiring that all information be converted into bit streams or data packets before transmission to the satellite. - Justify. (Nov/Dec 2018)

14 Explain in detail how carrier recovery is done in TDMA. Describe the concept of multiplexing. What is the advantage of TDMA over FDMA with respect to demand assignment? (Apr/May 2018) (Nov/Dec 2019)

15 (i) Draw the encoder diagram for the following digital signals- Unipolar NRZ, Polar NRZ, Manchester, Polar RZ for the digital data 1010111 (ii) Explain the principle behind CDMA with a diagram and mention any two advantages of CDMA for satellite networking. (Apr/May 2018)

16 Distinguish between preassigned and demand-assigned traffic in relation to a satellite communications network.

17 Given that the IF bandwidth for a 252-channel FM/FDM telephony carrier is 7.52 MHz and that the required [C/N] ratio at the earth station receiver is 13 db. Calculate (a) the [C/T] ratio and (b) the satellite [EIRP] required if the total losses amount to 200 dB and the earth station [G/T] ratio is 37.5 dB/K.

18 Briefly describe the ways in which demand assignment may be carried out in an FDMA network. . (Apr/May 2021)

19 What is the function of: a) the burst-code word and b) the carrier and bit-timing recovery channel in a TDMA burst? (Apr/May 2021)

20 In a TDMA network the reference burst and the preamble each requires 560 bits, and the nominal guard interval between bursts is equivalent to 120 bits. Given that there are eight traffic bursts and one reference burst per frame and the total frame length is equivalent to 40, 800 bits, calculate the frame efficiency. (Apr/May 2021)


UNIT-V / PART-A


1 Give the 3 different types of applications with respect to satellite systems.

2 Write the principle behind DTH and GPS.

3 Give the types of satellite services.

4 An intelligent VSAT must use what type of networking to permit the maximum utilization of the satellite capacity?

5 What are the applications of Radarsat?

6 What is ECEF?

7 Define dilution of precision in GPS?

8 What is PDOP?

9 What is DBS? Name any two services

10 Give the frequency range of US DBS systems with high power satellites.

11 Write about bit rates for digital television.

12 Give the satellite mobile services. Or write down the names of any four mobile satellite services.

13 What is INMARSAT?

14 List out the regions covered by INMARSAT.

15 What is INSAT?

16 What is GSM?

17 What is GPRS?

18 Define DAB.

19 What is DVB?

20 What is GRAMSAT?

21 Write the four kinds of communication that network structure of MSAT can accommodate. 

22 Write the two areas of satellite communication which are gaining major thrust from leading satellite industry and organization in recent years.

23 Name the services provided by GSM

24 Outline the three regions to allocate the frequency for satellite services. 

25 List the frequency bands assigned for DTH systems. 

26 List the basic principle of VSAT networks.

27 In what ways, does a satellite transfer TV signal to the particular consumer? 

28 Mention the services of INSAT.

29 Write any two features of GPS.

30 What is the difference between active and passive satellites?


UNIT-V / PART-B


1 Describe the operation of typical VSAT system. State briefly where VSAT system find widest application. (May/June 2015)

2 Write notes on a) INTELSAT b) E-mail c) BTV & d) DTH (Nov/Dec 2016)

3 Describe the main features and services offered by Mobile Satellite Systems. (Apr/May 2016)

4 Explain the types of INTELSAT satellites with respect to basic space craft characteristics and vehicle type. (April 2014)

5 i) Discuss in detail about GPS satellite services. (Apr/May 2021)

ii) Write a detailed note on MPEG compression standards. (Nov/ Dec2019)

6 Explain the RADAR sat and MSAT. Mention the application.

7 Explain about LEO, MEO & GEO. (Nov 2013) (Apr/May 2021

8 What is meant by INMARSAT? What are the objectives of the GRAMSAT program? What are applications seen for DAB? (Apr/May 2017)

9 i) With block diagram explain the working principle of DBS-TV receiving system.

ii) Write an overview on VSAT systems. (Apr/May 2017) (Nov/ Dec2019) (Apr/May 2021)

10 Write short notes on GSM. (Nov/Dec 2017)

11 Describe on the satellite navigational system. (Nov/Dec 2017)

12 (i) Explain the features of Direct to Home Broadcasting Satellite. (Apr/May 2021) (Nov/Dec 2018)

(ii) State the features to make satellite communication system advantageous in appropriate applications. (Nov/Dec 2018)

13 How mobile services are used in satellite communication systems? (Nov/Dec 2018)

14 Write the features of digital TV broadcast. List the various factors of home receiver unit. (Nov/Dec 2018)

15 (i) Explain the concept behind DTH. (ii) Write in detail about the features of GPS. (Apr/May 2018)

16 (i) Briefly describe about satellite navigation system (ii) Describe in detail about video conferencing and state its advantages and disadvantages. (Apr/May 2018)

17 Give a detailed note on E-mail. (Nov/ Dec2019)

Post a Comment

0Comments

Post a Comment (0)