SATCOM PART 2

A common up-converter and down-converter IF is

• 36 MHz

• 40 MHz

• 70 MHz

• 500 MHz

The type of modulation used on voice and video signals is

• AM

• FM

• SSB

• QPSK

The modulation normally used with digital data is

• AM

• FM

• SSB

• QPSK

Which of the following is not a typical output from a GPS receiver?

• Latitude

• Speed

• Altitude

• Longitude

A geostationary satellite

• is motionless in space (except for its spin)

• is not really stationary at all, but orbits the Earth within a 24-hr period

• appears stationary over the Earth’s magnetic pole

• is located at a height of 35,800 km to ensure global coverage

Indicate the correct statement regarding satellite communications.

• If two earth stations do not face a common satellite, they should communicate via a double-satellite hop.

• Satellites are allocated so that it is impossible for two earth stations not to face the same satellite

• Collocated earth stations are used for frequency diversity

• A satellite earth station must have as many receive chains as there are carriers transmitted to it

Satellite used for intercontinental communications are known as

• Comsat

• Domsat

• Marisat

• Intelsat

The height of the geosynchronous orbit above the equator is about:

• 3,578 km

• 35,780 km

• 357,800 km

• depends on satellite velocity

The high and low points of a satellite's orbit are called, respectively,:

• apogee and perigee

• perigee and apogee

• uplink and downlink

• downlink and uplink

The area on the earth that is 'covered' by a satellite is called its:

• earth station

• downlink

• footprint

• plate