why we use visible spectrum for FSO (free space optic),although it seems strange that when we have to communicate in urban areas then too much light will be in atmosphere for the sake of communication.

0 Answers  

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How works inductive & capacitive sensors and what is the difference between them?

2 Answers  

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what is the difference between cdma and gsm

2 Answers  

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why telecom tower having two color( Red and White)in all of the world, any solid reason

4 Answers   IEEE,

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If anybody wrote AAI(ATC) exam please... post the questions wat they asked in the exam... Definately it will be more helpful for all the students in INDIA.

2 Answers   AAI Airports Authority Of India,

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Please, give me the simple circuit dig. for "oscillator with variable frequency & upto 6W". I will be very thankful to you.

0 Answers  

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Explain how the active power factor correction changes the wave shape of current drawn by a load to improve the power factor?

0 Answers  

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in 8051 micro-controller is it must necessary using external oscillator ? shall we continue without oscillator for simple logic purpose?

1 Answers  

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How will you connect a waveguide to a coax?

0 Answers   BEL,

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why we prefer expressing the gain of an amplifier on a logarithmic scale rather than linear scale?

2 Answers   TATA,

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We use two different bands for GSM/DCS communications; GSM900 and DCS-1800. Which one is the better of the two in terms of quality and coverage?

1 Answers  

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differentiate wired and wireless communication. differentiate co-channel and adjacent channel interference.

4 Answers   Bell,

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