Description : The earth area covered by a satellite radio beam. A. Beamwidth B. Bandwidth C. Footprint D. Zone
Last Answer : C. Footprint
Description : Is the geographical representation of a satellite antenna radiation pattern A. Footprint B. Spot C. Earth D. Region
Last Answer : A. Footprint
Description : Footprint refers to coverage area in the globe A. Satellite radiation polarization B. Satellite navigation C. Satellite radiation pattern D. Satellite coverage
Last Answer : C. Satellite radiation pattern
Description : An area on the surface of the earth within which the bore sight of the steerable satellite beam intended to be pointed A. Effective boresight area B. Countour boresight are C. Coordination boresight are D. Equivalent boresight area
Last Answer : A. Effective boresight area
Description : When satellite radio beam is aimed towards earth, it illuminates on the earth for an oval shaped area called
Last Answer : footprint
Description : Satellite orbits around the earth are ____ orbits. A. circular B. either elliptical or circular C. elliptical D. circular only
Last Answer : B. either elliptical or circular
Description : ECE Board Exam March 1996 It is a spacecraft placed in orbit around the earth carrying onboard microwave receiver and transmitting equipments. A. Fiber optic equipment B. Communications satellite C. Wireless radio system D. Coaxial cable syste
Last Answer : B. Communications satellite
Description : A satellite beam that covers almost 42.4% of the earths surface. A. Zone beam B. Hemispheric beam C. Spot beam D. Global beam
Last Answer : D. Global beam
Description : The smallest beam of a satellite antenna radiation pattern A. Zone beam B. Hemispheric beam C. Spot beam D. Global beam
Last Answer : C. Spot beam
Description : How does spatial isolation technique in satellite communications avoid interference? A. Use of different polarity antennas B. Use of different types of antennas C. Employment of highly directional spot-beam antennas D. Use of low gain antennas
Last Answer : C. Employment of highly directional spot-beam antennas
Description : Which of the following refers to the smallest beam of a satellite antenna’s radiation pattern A. Global beam B. Spot beam C. Zone beam D. Hemispheric beam
Last Answer : B. Spot beam
Description : A satellite beam that covers almost 42.4% of earths surface. A. Spot beam B. Global beam C. Zone beam D. Hemispheric beam
Last Answer : B. Global beam
Description : Which of the following refers to the smallest beam of satellite antenna’s radiation pattern? A. Hemispheric beam B. Spot beam C. Zone beam D. Global beam
Description : The decision of competent authority that DO(PLI) procuring effective business to the tune of ____ or more shall no be eligible for automatic extension of tenure for the next ___ year. Such extension will be granted by ... Post c) 25 crores, 1 year, Head of the circle d) 25 cores. 1 years, SSP/SP
Last Answer : c) 25 crores, 1 year, Head of the circle
Description : What region around a broadcasting transmitter in which satisfactory reception of broadcasting signal is not obtained? A. Fringe area B. Primary are C. Secondary area D. Tertiary area
Last Answer : A. Fringe area
Description : What is a selective fading effect? A. A fading effect caused by small changes in beam heading at the receiving station. B. A fading effect caused by phase differences between radio wave ... station D. A fading effect caused by time differences between the receiving and transmitting stations.
Last Answer : B. A fading effect caused by phase differences between radio wave components of the same transmission, as experienced at the receiving station.
Description : What is the major cause of selective fading? A. Small changes in the beam heading at the receiving station. B. Large changes in the height of the ionosphere, as experience at the ... Phase differences between radio wave components of the same transmission, as experienced at the receiving station.
Last Answer : D. Phase differences between radio wave components of the same transmission, as experienced at the receiving station.
Description : Refers to an effect of selective fading. A. A fading effect caused by phase differences between radio wave components of the same transmission, as experienced at the receiving station. B. A fading ... caused by large changes in the height of the ionosphere, as experienced at the receiving station.
Last Answer : A. A fading effect caused by phase differences between radio wave components of the same transmission, as experienced at the receiving station.
Description : Essentially a satellite ___________ is a radio repeater in the sky A. transponder B. comparator C. duplexer D. billboard
Last Answer : A. transponder
Description : Radio communication operation service between mobile and land stations or between mobile stations. A. Land mobile satellite service B. Maritime mobile service C. Mobile service D. Land mobile
Last Answer : C. Mobile service
Description : ____ is defined as any radiation of energy by means of electromagnetic wave. A. Emission B. Radiation C. Radio D. Broadcasting
Last Answer : A. Emission
Description : A radio signal travels ____ yards per microseconds. A. 273 B. 328 C. 618 D. 123.6
Last Answer : C. 618
Description : ____ is a term given to the region where superrefraction occurs. A. Strata B. Duct C. Isothermal region D. Tropospheric region
Last Answer : B. Duct
Description : The angle of elevation of the antenna beam is 20°. Calculate the transmission-path distance for an ionospheric transmission that utilizes a layer of virtual height 200 km. Use flat-earth approximation. A. 966 km B. 2100 km C. 1100 km D. 405 km
Last Answer : C. 1100 km
Description : What is the free space attenuation of a satellite communications system operating at 36,000 km above the earth at 5.0 GHz? A. 198 dB B. 202 dB C. 142 dB D. 138 dB
Last Answer : A. 198 dB
Description : What is the propagation delay when a signal is transmitter by an earth station to a geosynchronous satellite about 38,500 km above earth’s equator and then received by the same earth station? A. 256 msec B. 128 msec C. 300 msec D. 400 msec
Last Answer : A. 256 msec
Description : Refers to the satellite orientation with respect to the earth A. Satellite altitude B. Satellite position C. Satellite location D. Satellite orbit
Last Answer : A. Satellite altitude
Description : The signal path from satellite to earth-based receiver. A. Downlink signal B. Uplink signal C. Incident signal D. Reflected signal
Last Answer : A. Downlink signal
Description : The signal path from earth station satellite A. Uplink signal B. Reflected signal C. Incident signal D. Downlink signal
Last Answer : A. Uplink signal
Description : The round-trip propagation delay between two earth stations through a geosynchronous satellite is A. 500 to 600 ms B. 300 to 400 ms C. 600 to 700 ms D. 400 to 500 ms
Last Answer : A. 500 to 600 ms
Description : Satellite the orbits in a circular pattern with an angular velocity equal to that of the earth A. Geostationary B. Early Bird I C. Syncorn I D. Stationary satellite
Last Answer : A. Geostationary
Description : The physical location of a satellite is determined by its A. distance from the earth B. latitude and longitude C. reference to the stars D. position relative to the sun
Last Answer : B. latitude and longitude
Description : How can multiple earth stations share a satellite on the same frequencies? A. Frequency reuse B. Multiplexing C. Mixing D. Frequency hopping
Last Answer : A. Frequency reuse
Description : The jet thrusters are usually fired to A. maintain altitude B. put the satellite into the transfer orbit C. inject the satellite in the geosynchronous orbit D. bring the satellite back to earth.
Last Answer : A. maintain altitude
Description : What is the delay time for satellite transmissions from earth transmitter to earth receiver? A. 0.5 s B. 1s C. 5 ms D. 0.25 s
Last Answer : A. 0.5 s
Description : What is the delay time for satellite transmission from earth transmitter to earth receiver? A. 0.5 s B. 1.0 s C. 5 ms D. 0.25 ms
Description : A satellite cross-link means A. Earth-to-satellite link B. Satellite-to-earth link C. Satellite-to-satellite link D. None of these
Last Answer : C. Satellite-to-satellite link
Description : What is the approximate path loss from satellite-to-earth station? A. 100 dB B. 150 dB C. 175 dB D. 200 dB
Last Answer : D. 200 dB
Description : Point on the satellite obits closest to the earth. A. Apogee B. Perigee C. Prograde D. Zenith
Last Answer : B. Perigee
Description : What height must a satellite be placed above the surface of the earth in order for its rotation to be equal to earth’s rotation? A. 26,426.4 miles B. 27,426.4 miles C. 23,426.4 miles D. 22,426.4 miles
Last Answer : D. 22,426.4 miles
Description : ___________ is a satellite that rotates around the earth in a low-altitude elliptical or circular pattern. A. Geosynchronous satellite B. Nonsynchronous satellite C. Prograde satellite D. Retrograde satellite
Last Answer : B. Nonsynchronous satellite
Description : What satellite system parameter represents the quality of a satellite or an earth station receiver? A. Gain-to-Equivalent Noise Temperature Ratio (G/Te) B. Energy of Bit-to-Noise Density Ratio (Eb/No) C. Carrier-to-Noise Density Ratio (C/No) D. Bit energy
Last Answer : A. Gain-to-Equivalent Noise Temperature Ratio (G/Te)
Description : Is a kind of satellite which has a period of revolution equivalent to the period of rotation of the earth about its axis. A. Passive satellite B. Synchronous satellite C. Active satellite D. Geosynchronous satellite
Last Answer : D. Geosynchronous satellite
Description : What is the approximate percentage of earth coverage of a geostationary satellite at zero degree elevation? A. 33.3% B. 45.2% C. 42.5% D. 30.5%
Last Answer : C. 42.5%
Description : Satellite system or part of a satellite system, consisting of only one satellite and the operating earth station. A. Satellite system B. Satellite network C. Space system D. Multi-satellite link
Last Answer : B. Satellite network
Description : An earth satellite whose period of revolution is equal to the period of rotation of the earth about its axis. A. Geosynchronous B. Steerable C. Passive D. Active
Last Answer : A. Geosynchronous
Description : ECE Board Exam March 1996 The point on the satellite orbit, closest to the earth is A. prograde B. perigee C. zenith D. apogee
Last Answer : B. perigee
Description : A radio land station in the land mobile service A. Mobile station B. Land station C. Base station D. Ship earth station
Last Answer : C. Base station
Description : In the US ecological footprint of each person is about 9.4 hectares. The Earth presently has 11.4 billion hectares of productive land and water. If everyone in the world lived at the same level of con?
Last Answer : A great majority of the world's population would have to bekilled.
Description : ____________ is measuring the propagated field strength over the projected service area A. Radio sounding B. None of these C. Radio monitoring D. Radio survey
Last Answer : D. Radio survey