Digital Communication Quiz Questions and Answers Pdf - 2

Question: 6

Which one of the following is capable of giving the highest data speed?

(A) Optical fibre system

(B) Microwave satellite system

(C) Microwave LOS link

(D) Coaxial cable link

Question: 7

Communication satellites are allotted bandwidth of 500 MHz. This can be increased by using

(A) Triple modular redundancy

(B) Frequency division multiplexing

(C) Time division multiplexing

(D) Frequency and polarization re-use

Question: 8

Antenna elevation angle at the ground station for satellite communication is always kept above 5° to

(A) Increase the visibility of the satellite

(B) Minimise the slant range

(C) Reduce the effect of oxygen and water vapour absorption on the antenna noise temperature

(D) Minimise the sky noise temperature

Question: 9

In ship to ship communication, the problem of fading can be overcome by using

(A) A broadband antenna

(B) More directional antenna

(C) Space diversity

(D) Frequency diversity

Question: 10

A Ruby Maser is considered to be superior to an Ammonia Maser because of

(A) Greater bandwidth

(B) Low signal to noise ratio

(C) Higher power output

(D) Low amplification factor and low noise levels