What is the need for modulation?
Answer Posted / kabir
Modulation is a process in which the characteristics of a
signal circuit is caried in accordance with the information
signal which is to be transmitted.
The modulation signal,which is to be transmitted isknown
as Modulating signal.
Need for modulation:
i)multiplexing
ii)practicability of antennas height
iii)frequency conversion
| Is This Answer Correct ? | 87 Yes | 36 No |
Post New Answer View All Answers
Explain how to format a memory card by using memory card?
What is meant by D-FF? What is the basic difference between Latches and Flip flops? What is a multiplexer? How can you convert an SR Flip-flop to a JK Flip-flop? How can you convert an JK Flip-flop to a D Flip-flop? What is Race-around problem? How can you rectify it? Which semiconductor device is used as a voltage regulator and why? What do you mean by an ideal voltage source? What do you mean by zener breakdown and avalanche breakdown? What are the different types of filters? What is the need of filtering ideal response of filters and actual response of filters? What is sampling theorem? What is impulse response? Explain the advantages and disadvantages of FIR filters compared to IIR counterparts. What is CMRR? Explain briefly. What do you mean by half-duplex and full-duplex communication? Explain briefly. Which range of signals are used for terrestrial transmission? What is the need for modulation? Which type of modulation is used in TV transmission? Why we use vestigial side band (VSB-C3F) transmission for picture? When transmitting digital signals is it necessary to transmit some harmonics in addition to fundamental frequency? For asynchronous transmission, is it necessary to supply some synchronizing pulses additionally or to supply or to supply start and stop bit? BPFSK is more efficient than BFSK in presence of noise. Why? What is meant by pre-emphasis and de-emphasis? What do you mean by 3 dB cutoff frequency? Why is it 3 dB, not 1 dB?
plz tll me wch area i will prepare 4 IOCL EXAM............
whats the new trend in ece...? why we are going for embedded..?
What is forced commutation?
i want BHEL electronics and communication placement papers.
We have 6.6 KV, 250 KW HT Motor and i want to run this motor with 250 KW LT Variable frequency drive. Is this Possible? How? what are the major modification required?
i want to know some description about SIM architecture... what is inside the SIM?
What is the effect of if in radio receiver?
Define angle and amplitude modulation? What is noise in modulation?
i m selected in AAI JE. my interview is on 25 sept. 2010. i don't hv any idea abt aai interview. can anyone help me, i want to know interview qus of aai. so pls help me... my e-mail id -- mailmanish_kumar@yahoo.co.in
Hello Can any body tell me the list of interview answers asked UMTS Planning and optimazation as i have interview today. Pla mail me on satish_jd2000@yahoo.com its urgent. Thank you
what is resistive diode?
what is the role of electronics,communication engg. in IT industry?
i completed my b.tech.i want to prepare for civils. when new batch classes will start at rc reddy. plz mail me rajesh.mc28@gmail.com