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what is modulation? what is its need.
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.......
Explain why high frequency carrier waves are needed for effective transmission of signals?
draw a block diagram of a simple amplitude modulation.explain briefly,how amplitude modulationis achieved.
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??
why do we need to modulate the frequency?
what are the limitations of amplitude modulation?
explain detection of amplitude modulated wave
What is meant by detection of modulated carrier wave? Explain briefly steps for detection?
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!!!!
write two factors justifying the need of modulating a signal.
Why do we use manganine wire in potentiometer?
what is square law device?
Sir, Why moon cannot be used as a communication satellite?
Which part of electromagnetic spectrum is used in satellite communication ?
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 space wave propagation?
The block diagram of AM transmitter and AM receiver
explain about downlink and uplink????
what is the necessity of modulation?
why is an FM signal less susceptible to noise than AM signal ?
What is amplitude modulation?
is it necessary for a transmitting antenna to be at the same height as that of a the receiving antennae for line of sight communication?a tv transmitting antenna is 81 m tall.how much service area can it cover if the receiving antenna is at the ground level?
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?
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???/
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 ?
Explain Ohm's law ??
what is html?explain in detail?
what does line of sight communication means???
Why do long distance radio broadcasts use shortwave bands?
examples of sky wave propagation,ground wave rpopagation
What is sky wave propagation ?
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 url?explain in detail?
Difference between transducer and transmitter?
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
what are logic gates??
what is modulation means?
explain the function of modem in data communication
explain why high frequency carrier waves are needed for effective transmission of signals?
Deduce an expression for the distance upto which the TV signal can be directly received from a TV tower of height h.
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