Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / syncopator
If we radiate a simple r.f. carrier it conveys no information other than the fact that its transmitter is working. Not much use is it?
The name "carrier" suggests that it is capable of carrying information.
The information is applied to the carrier so that the carrier's characteristics are changed. It is these changes which represent the information being carried.
Changes to the carrier's characteristics are called modulation.
The two most common ways that the information can change its carrier's characteristic are by altering the amplitude of the carrier (it should come as no surprise to learn that this is called amplitude modulation, abbreviated to a.m.), and by altering the frequency of the carrier (which, of course, is f.m.)
The process of recovering the information imposed upon a carrier (the modulation) is called demodulation or detection.
Exactly the same processes are encountered in audio.
If an audio note has its amplitude varied (modulated) to and fro (up and down) it is called tremolo - in r.f. we call it a.m. (it's the same thing).
If an audio note has its frequency varied back and forth, it is called vibrato - in r.f. we call it f.m. (it's the same thing).
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
What are the characteristics of an ideal op-amp.
What is engineering?
What is the significance of the bandwidth of an amplifier?
Draw vi characteristics of pn junction diode.
what is the difference bet 4 wire transmiiters and 2 wire transmitters
hi im doing my final year b.tech and im having 50 backlogs in my b.tech is there any chance to persuie M.S in USA and my gre score is 1040 toefl score is 90 please help me
describe the functioning of parallel adder ? what are the adventages of parallel adder over series adder?
What principle does a q-meter operate?
what is an integrator?
what do u mean by Abis interface between bts and bsc
What type of questions are asked in Tetra pak onlinr test
Which material is piezoelectric?
What is the necessity of heat sink?
what are the fiber losses,How to rectify it?
What is circuit testing?
