Wire-line and fiber-optic channel, Electrical Engineering

Assignment Help:

Q. Wire-line and Fiber-optic channel?

Wire-line channels are used extensively by the telephone network for voice, data, and video transmission. Twisted-pair wire lines (with a bandwidth of several hundred kHz) and coaxial cable (with a usable bandwidth of several MHz) are basically guided electromagnetic channels.

Fiber-optic channels offer a channel bandwidth that is several orders ofmagnitude larger than coaxial cable channels. The transmitter or modulator in a fiber-optic communication system is a light source, such as a light-emitting diode (LED) or a laser, whose intensity is varied (modulated) with the message signal. The light propagates through the fiber as a light wave and is amplified periodically along the transmission path to compensate for signal attenuation. At the receiver end, the light intensity is detected by a photodiode, whose output is an electric signal that varies in direct proportion to the power of light striking on the photodiode. Optical fiber channels are replacing nearly all wire-line channels in the telephone network.


Related Discussions:- Wire-line and fiber-optic channel

Telecommunication, Design a low noise amplifier using an Infineon RF transi...

Design a low noise amplifier using an Infineon RF transistor BFP640. The amplifier is to be used to amplify the L2 GPS signal and so the centre frequency is 1227MHz and bandwidth 4

Determine the speed at which the machine runs as a motor, A 100-kW, dc shun...

A 100-kW, dc shunt generator, connected to a 220-V main, is belt-driven at 300 r/min, when the belt suddenly breaks and the machine continues to run as a motor, taking 10 kW from t

Dsp., fir and iir filter design

fir and iir filter design

Determine the number of poles of this ac motor, Q. A three-phase ac motor, ...

Q. A three-phase ac motor, used to drive a draft fan, is connected to a 60-Hz voltage supply. At noload, the speed is 1188 r/min; at full load, the speed drops to 1128 r/min. (a

Draw the power flow diagram showing voltages, For the 3 bus system shown be...

For the 3 bus system shown below all values are given in pu on a 100MVA base (a) Use Matlab functions lf gauss and lf Newton to find power flow solution for the system, accurate

Event triggering, what is event triggering related to digital storage oscil...

what is event triggering related to digital storage oscilloscope?

Regions of operation, Regions of operation: Applied volta...

Regions of operation: Applied voltages Mode E Forward active E C Saturation E > B

Calculate the minimum sampling frequency, Three sine waves along with frequ...

Three sine waves along with frequencies 100Hz, 200Hz and 350Hz and with amplitudes of 1V, 2V and 1.5V correspondingly, are added together to make a single waveform. What is the min

Positive edge triggered d flip flop , Positive  Edge Triggered D Flip Flop...

Positive  Edge Triggered D Flip Flop In this type  of D flip Flop  ( 7475)  shown in figure  the output changes with  positive  edge  of the CLK when CLK  changes  from 0 to 1

What is centralized spc, Q. What is centralized SPC? In centralized con...

Q. What is centralized SPC? In centralized control, all control equipment is replaced by a single processor which should be quite powerful. It should be capable of processing 1

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd