What is meant by pre-emphasis and de-emphasis?
- 24 Answers
- 106052 Views
- BEL, BSF, I also Faced
- E-Mail Answers
Answer Posted / mandeep kaur maan
pre emphasis:
It is basically a technique used for FM transmission.
it means to enhance(increase the amplitude of) the higher
frequencies of the modulating signal so as to enhance the
signal to noise ratio ratio. this is done at the time of
transmission. th reason being that the noise affects the
higher frequencies more than the lower frequencies.
de-emphasis:
this is done at the time of recieving the FM signal
it means to lower the amplitude of the higher frequencies
(enhanced at the time of transmission) so that the noise
component that mixes at the transmission tme is cut off and
we recieve a better quality of the signal.
| Is This Answer Correct ? | 79 Yes | 13 No |
Post New Answer View All Answers
What is a feedback? And explain different types of feedback.
wat is an ethernet
how many types of thyristor are? shortly define them with purpose, application & working principle?
WHICH TYPES OF QUESTION & WHICH BEST BOOK IN PREPARING FOR COMMUNICATION ?
define inter-base resistance
Explain the importance of the biasing in transister circuits?
Explain why is 400 hz used for flight instruments and radio transmission system in aviation industry universally?
Define potential transformers?
What is the difference between demultiplexer and decoder?
What are the specifications of the scr ?
What is the internal structure of op-amp and explain each block in brief?
can we conect lowpass filter before high pass filter in cascade form in band pass filter?(active filter).
Explain what is difference between fixed-bias circuit & self-bias circuit?
Can we use ic 741 for high frequency applications?
What is meant a series inverter?
