Electronics and communication

A complete communication system must include

• a transmitter and receiver

• a transmitter, a receiver, and a channel

• a transmitter, a receiver, and a spectrum analyzer

• . a multiplexer, a demultiplexer, and a channel

The satellite that is used as a relay to extend communication distance is called as __________

• Relay satellites

• Communication satellites

• Repeater satellites

• Geosynchronous satellites

The transmitter-receiver combination in the satellite is known as a _______

• Relay

• Repeater

• Transponder

• Duplexer

What is the reason for carrying multiple transponders in a satellite?

• More number of operating channel

• Better reception

• More gain

• Redundancy

Why are VHF, UHF, and microwave signals used in satellite communication?

• More bandwidth

• More spectrum space

• Are not diffracted by the ionosphere

• Economically viable

What is the reason for shifting from c band to ku band in satellite communication?

• Lesser attenuation

• Less power requirements

• More bandwidth

• Overcrowding

Why are techniques like frequency reuse and spatial isolation carried out?

• Reduce traffic load

• More gain

• High speed

• Error detection

Which technique uses two different antennas to reduce traffic on the same frequency?

• Spatial isolation

• Frequency reuse

• Multiplexing

• Modulation

The first geostationary satellite launched in 1965 was called

• ANIK

• EARLY BIRD (Intelsat-I)

• WESTAR

• MOLNIYA

Rotation of a geosynchronous satellite means its

• drift from stationary position

• wobbling

• three-axis stabilization

• three-dimensional stabilization