Basics of Communication

The minimum height of antenna required for transmission in terms of ʎ is ________

• 3ʎ⁄2

• ʎ⁄4

• 2ʎ

• ʎ

What do you understand by the term analog communication?

• A method in which one of the properties of a carrier signal varies in proportion to an instantaneous value of modulation signal

• A way for data and computer communication

• A numerical coded communication

• A suitable method for long distance communication

Medium which sends information from source to receiver is called ________

• Transmitter

• Transducer

• Loudspeaker

• Channel

Modulation is done in ________

• Receiver

• Transducer

• Between transmitter and radio receiver

• Transmitter

Demodulation is done in ________

• Channel

• Receiver

• Receiving antenna

• Transducer

What is the role of channel in communication system?

• acts as a medium to send message signals from transmitter to receiver

• converts one form of signal to other

• allows mixing of signals

• helps to extract original signal from incoming signal

Noise is added to a signal ________

• At receiving antenna

• In the channel

• At transmitting antenna

• During regeneration of information

Signal containing information to be transmitted is known as

• modulating signal

• modulated signal

• carrier signal

• received signal

____________ is a waveform that is modulated with an information bearing signal for the purpose of conveying information.

• Message signal

• Baseband signal

• Modulating signal

• Carrier signal

_______________ is the process by which some characteristics of a high frequency carrier signal is varied in accordance with the instantaneous value of the message signal.

• Demodulation

• Transmission

• Modulation

• Reception