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what is modulation? what is its need.
The block diagram of AM transmitter and AM receiver
What is meant by grating element?
why skywave not used in the transmission of tv signals?
What is the difference between point to point and broadcast communication modes. Give one example
define sky wave propogation
why ar microwaves used in RADAR?
when modulation index is kept less than 1 distortion dosent occur.......how and why???? plxzzzzzzz reply briefly........nd fastly.......
draw a block diagram of a simple amplitude modulation.explain briefly,how amplitude modulationis achieved.
Why do long distance radio broadcasts use shortwave bands?
Explain why high frequency carrier waves are needed for effective transmission of signals?
The height of TV tower at place is 400m. Calculate:
i) Area maximum range upto which signals can be recieved from the tower.
ii) Area covered by the transmission. (radius of the earth=6400km)
what is square law device? what is the function of this?
Please suggest me any me hurry up!
i am wating your reply?
State two factors by which the range of TV signal can be increased??
digital have two levels or analogue????
why do we need to modulate the frequency?
what is difference between fibre optic cable and coaxial cable?
what are the limitations of amplitude modulation?
why is modulation index generally kept low?
explain detection of amplitude modulated wave
What is the function of a Repeator , Transmitter , Reciever in a communication system ?
What is meant by detection of modulated carrier wave? Explain briefly steps for detection?
draw a plot of variation of ' amplitude ' versus 'w ' for an amplitude modulated wave. hence explain the need for keeping the broadcast frequencies sufficiently spaced out ?
what is ground wave propagation
Which mode of propagation is used by short wave broadcast services having frequency range from a few MHz upto 30MHz? Expain diagrammatically how long distance communication can be achieved by this mode.Why is there an upper limit to frequency of waves used in this mode?
Sir plz..give the answer fast!!!!
Why do we use manganine wire in potentiometer?
write two factors justifying the need of modulating a signal.
what is square law device?
Sir, Why moon cannot be used as a communication satellite?
I need to prepare project on Communication System ...can someone help me on it
It is based on the CBSE....and i need it for submission for the partial fullfilment for the requirement for studies in Physics 10+2.
please help me select toic or to prepare.
your help is heartly welcome at: email@example.com
before 06 november, 2012.
what is exact definition for line of sight
What is space wave propagation?
why d is root of 2Rht.........
explain about downlink and uplink????
write an expression for maximum range in LOS communication???
A TV tower has a height of 100m. How much population is covered by the TV broadcast if the average population density around the tower is 1000 persons per sq km?
Which part of electromagnetic spectrum is used in satellite communication ?
what is the necessity of modulation?
A TV tower has a height of 71m. What is the maximum distance up to which TV transmission can be received?
Read the following story and answer the questions Sagar is an Engineer working in Samsung Company and posted at Guwahati, and his wife Geeta is a House wife glued to TV program throughout the day. One day Geeta while manually operating the TV found a continuous cracking sound in the TV and got frightened. She immediately called Sagar who instructed Geeta to switch off the TV. Then Sagar contacted the Airtel Digital TV customer care and instructed them something. That night after returning from the office Sagar told Geeta that he has fixed the TV but it will again become malfunctioning if she watches TV more than two hour a day. Next morning Geeta started watching TV as usually for the whole day, without caring for what Sagar has instructed .She thought that Sagar will not come to know about it. She continued like that for two more days and in the third morning she found that only but the News channel no other channel is available in the TV.She called Sagar back,but Sagar simply said that its because she did not listen to the instruction that is why TV is permanently Damaged.- (i) Why the TV was producing the cracking sound,(ii) Amongst Sagar and Geeta who was morally incorrect according to your opinion?
why is an FM signal less susceptible to noise than AM signal ?
What is amplitude modulation?
an audio signal is not transmitted directly by converting it into an electromagnetic wave of same frequency.give 2 reasons.
KINDLY PROVIDE THE SOLUTION OF PHYSICS CLASS 12 SET 55/3 OF BOARD 2013 SOON?
pls explain modulation and demodulation???/
what is html?explain in detail?
plz giv me some more details on Amplitude modulation?
how do a transducer converts energy in one form to energy in the another form?
what is optical communication and its advantage ?
wht s amplitude modulation
IN THE AM DIAGRAM IDENTIFY THE (wm+wc) and (wm-wc).
im in very much trouble ..plzz help!!
what does line of sight communication means???
how many hours i have to study for 80 + percentage in class 12
A message signal of frequency 10kHz and peak voltage 10 V is used to modulate a carrier of frequency 1 MHz and peak voltage of 20V.Determine
a) Modulation Index
b) the side bands produced
What is sky wave propagation ?
A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad in parallel with a load resistance 100 kilo ohm. Find the maximum modulated frequency which could be detected by it
Difference between transducer and transmitter?
what are logic gates??
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