Communication system

Assertion: Amplification is necessary to compensate for the attenualtion of the signal in communication system. Reason: Amplification is the process of increasing the amplitdue and consequently the strength of a signal using an electronic circuit.

An optical communication system, having an operating wavelength, lambda (in meters), can use only x% of its sourcefrequency as its channel band width.The system is to be used for transmitting TV signal requiring a band width of F hertz. How many channels can this system transmit simultaneously?

Optical communication system having an operating wavelength lambda metre can use only x % of its source frequency as its channel band width. The system is to be used for transmitting T.V signals requiring a band width of F hertz. How many channels can this system transmit simultaneously? Show graphically how this number of channels varies with operating wavelength of the system.

In a communication system operating at wavelength 800 nm, only one percent of source frequency is a available as signal bandwidth. The number of channels accomodated for transmitting TV signals of band width 6 MHz are (Take velocity of light c=3xx10^(8)m//s, h=6.6xx10^(-34)J-s )

Major parts of communications systems are:

Major parts of communications systems are:

Mention three different modes of propagation used in communications system. Explain with the help of a diagram how long distance communication can be achieved by ionospheric reflection of radio waves?

The minimum number of communication satellites (Geostationary) required to link the communication network of entire earth is

Name the system which facilitates communication between central nervous system and the other parts of the body. Mention two types of nerves it consists of along with their organs of origin.

Communication channel consist of: