Satellite Communication

This is an MCQ-based quiz on Satellite Communication.

This includes Helical antenna, Satellite dish, LNA, TWT, Transceivers, Transponders, and Transducers.

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What band does VSAT first operate?

L-band X-band C-band Ku-band

VSAT was made available in ……..

1979 1981 1983 1977

……………. collects very weak signals from a broadcast satellite

Helical antenna Satellite dish LNA TWT

………….is a loss of power of a satellite downlink signal due to earth’s atmosphere.

Atmospheric loss Path loss Radiation loss RFI

…………… is considered as the unsolved problem in satellite system.

Coverage Cost Access Privacy

As compared to 17.34° antenna, the total increase in the signal relayed by 4.5° antenna of INTELSAT-IV is ……….

14.85 220 78 3.85

Which one of the following statements regarding DSI is false?

It is a digital form of TASI Though it is more efficient than TASI, it is much slower A speaker has to wait (it at all) for only a few milliseconds for reallocation of channel It has increased the capacity of satellite channels by a factor of 2.2 or more with out degrading speech quality

The quality of a space-link is measured in terms of the ………. ratio.

C/N S/N G/T EIRP

At present, the radio-frequency band mainly used by most satellites is ……….

EHF UHF VHF SHF

The ending part of the popular teleserial Mahabharat will be beamed to the viewers

WESTAT INSAT-IC ARABSAT INSAT-ID

For satellite communication, standard Earth stations have antenna diameters in the range of ………….. metre.

27.5 to 30 10 to 15 30 to 50 5 to 10

What is meant by SCPC?

Single channel per carrier Single carrier per channel Single code per channel none of these

Which of the following comes under methods of multiple access techniques?

FDMA & TDMA SCPC & CDMA CDMA & GSM none of these

The average noise temperature of Earth, as viewed from space, is ………. °K

254 303 100 500

A typical error rate on satellite circuits is one bit error in

107 103 102 1010

The most effective anti jamming technique is ………..

Frequency hopping

Spread-spectrum modulation

Key leverage

Once-only key

Low-orbit satellites are not used for communications because they

Produce sonic booms

Do not provide 24 hour/ day contact to the users on Earth

Heat up and melt

None

In satellite communication, highly directional antennas are used to

Direct the spot beam to a particular region of space on Earth

Strengthen the beam to overcome the cosmic noise

Make corrections in change of polarisation of the beam

Select a particular channel in transmission and reception

Quiz/Test Summary

Title: Satellite Communication

Questions: 18

Contributed by:

Diego Tue, Mar 29, 2022 10:58 AM UTC

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