What is Pulse Amplitude Modulation and Pulse time modulation?
admin In Pam each sample is directly proportional to signal amplitude. Generally it is used for the modulation of the carrier wave The part (a) of figure represents the modulating signal.…
What is demodulation?
This process is used in the receivers to recover the original signal coming from the sender end in modulating form. We can say that its function is opposite to that…
Explain data transmission and data retrieval?
The data transmission is done basically in the form of audio frequency. First it is converted into electrical signals. Then the process of signal filtration is done. After the filtering…
What is modem?
Modem is a device which is used to connect two computers with the help of ordinary telephone lines. Voltage changes are not tolerated by our ordinary telephone lines. This limitation…
Explain the working of the modems?
As we know that the computers can’t understand our language. Computers understand the language of 0’s and 1’s i.e. digital form. The modem will modulate the signal into a sine…
What is Fax?
FAX is basically a technique of reproducing a document electronically at a distant place. FAX machine is an example of digital communication system. Uses of a fax machine: (a) It…
What is space communication?
The receiving, sending and processing of information using space as a medium is called space communication. The information is sent in the form of sound waves. To send the information,…
Explain the atmosphere of earth in respect of Communication?
The envelope made up of gases which is surrounding our earth is known as atmosphere. There are lot of gases which combine together to form the atmosphere. The major composition…
Explain the behavior of atmosphere towards infrared radiations and infrared light?
The atmosphere shows variation in behavior for different types of radiations. The sun and the stars present in our atmosphere are clearly visible to us. This is due to the…
What are the major advantages of the ozone layer?
The major function of the ozone layer is to stop the harmful radiations coming from the sun as well as from stars. Ozone captures those radiations which are of low…