Q1] MCQ based Paper: 40 marks
1) The Tracking system present in the earth station performs mainly two functions as ______.
- a) acquisition and tracking of earth station
- b) acquisition and tracking of the Sun
- c) acquisition and tracking of the Moon
- d) satellite acquisition and tracking of satellite.
2) In space qualification, components that have _______ reliability in outer space are selected.
- a) Low
- b) Medium
- c) High
- d) very low
3) Bandwidth used in LASER satellite communication is _______RF bandwidth.
- a) Larger than
- b) Equal to
- c) Smaller than
- d) depends on
4) The range between a ground station and a satellite is 42000 km. Calculate the free space loss a frequency of 6 GHz.
- a) 100dB
- b) 150dB
- c) 175dB
- d) 200.4dB
5) The traffic-handling capacity of an Earth station on the uplink depends on ______.
- a) its EIRP
- b) its antenna gain
- c) noise associated with the Earth Station
- d) received power at satellite
6) A master antenna TV (MATV) system is used to provide reception of __________to a small group of users.
- a) Conventional TV/AM channels
- b) DBS TV/AM channels
- c) DBS TV/FM channels
- d) Conventional TV/FM channels
7) Which of the following term is used to describe the microwave radiation which is present throughout universe and appears to originate from matter in any form at a finite temperature?
- a) Noise factor
- b) Antenna loss
- c) Sky noise
- d) Noise power spectral density
8) Double conversion transponder is used for _____ band.
- a) K
- b) Ku
- c) S
- d) C
9) What is the approximate time taken by the GPS for one complete orbit?
- a) 11 minutes
- b) 45 minutes
- c) 5 hours
- d) 12 hours
10) A satellite which simply reflects the signal without further amplification _______.
- a) Passive satellite
- b) Active satellite
- c) Geostationary satellite
- d) Domestic satellite
11) In TVRO, Outdoor unit mainly consists of ______.
- a) Transmitting antenna and Low Noise Block (LNB)
- b) Television Receiver
- c) receiving antenna and Low Noise Block (LNB)
- d) IF amplifier
12) Find the orbital period of the satellite in a circular orbit 500 km above the Earth’s surface.
- a) 1.6 hrs
- b) 3.2 hrs
- c) 2.4 hrs
- d) 6.4 hrs
13) What is the number of transponders if the satellite uses 12 channels of frequencyand frequency reuse is implemented ?
- a) 12
- b) 6
- c) 24
- d) 3
14) When two networks are connected in series, its composite noise figure can be given as ______.
- a) F1+(F2-1)/G1
- b) F1-(F2-1)/G1
- c) F2+(F1-1)/G1
- d) F1G1+(F2-1)
15) SCPC systems are widely used on lightly loaded routes, this type of service being referred to as a _________.
- a) thin route service.
- b) thick route service.
- c) busy route service.
- d) empty route service.
16) The CSC bandwidth is 160 kHz, and its center frequency is ______ below the pilot frequency.
- a) 18.045 MHz
- b) 18.045 kHz
- c) 1.8045 MHz
- d) 1.8045 kHz
17) A frame format of TDMA system includes.
- a) reference burst, preamble and traffic data.
- b) reference burst, guard time, preamble and traffic data.
- c) guard time, preamble and traffic data.
- d) reference burst, guard time and preamble.
18) In Satellite Radio sound quality is excellent due to a wide audio bandwidth of ______.
- a) 5–15 MHz
- b) 5–15 kHz
- c) 50-150KHz
- d) 50-150Hz
19) The angle between the line from the earth station’s antenna to the satellite and the line between the earth station’s antenna and the earth’s horizon is called as ______.
- a) Angle of inclination
- b) Angle of elevation
- c) Apogee angle
- d) Angle of azimuth
20) The rotation about ________ axis is called pitch in 3-axis stabilization.
- a) X
- b) Y
- c) Z
- d) W
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