ESAT

A signal that carries information through the system:

• Information

• Modulating Signal

• Intelligence

• Carrier

The difference between highest and the lowest frequencies contained in the information:

• noise

• bandwidth

• interference

• frequency

It is defined as to fluctuate between two states or conditions:

• Oscillate

• Synchronization

• Amplify

• Signal Generation

It is a random, undesirable electric energy that enters a communications system via the communicating medium and interferes with the transmitted message.

• interference

• noise

• distortion

• fluctuations

Also known as deep-space noise

• solar noise

• cosmic noise

• extraterrestrial noise

• man made noise

It is the process of putting information onto a high-frequency carrier for transmission

• multiplexing

• modukation

• mixing

• heterodyning

In communications system, noise is most likely to affect the signal

• at the transmitter

• in the channel

• in the information source

• at the information

Man-made noise occurs randomly at frequencies up to around

• 100 Hz

• 300 kHz

• 200 MHz

• 500 MHz

It is the process of modifying the characteristic of one signal in accordance with some characteristic of another signal

• multiplexing

• mixing

• modulation

• summning

The main function of a communications satellite is

• repeater

• reflector

• beacon

• observation platform