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MULTIPLEX.pptx

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MULTIPLEX.pptx

  1. 1. Multiplexer Keshav Dutt 3ME3 12003205
  2. 2. What is Multiplexer Presentation title 20XX 2 The Multiplexer acts as a multiple-input and single-output switch. Multiple signals share one device or transmission conductor such as a copper wire or fiber optic cable.In telecommunications, the analog or digital signals transmitted on several communication channels by a multiplex method. These signals are single-output higher-speed signals. A 4-to-1 multiplexer contains four input signals and 2-to-1 multiplexer has two input signals and one output signal. Multiplexers are also extended with same name conventions as DE multiplexer circuit is as below
  3. 3. Schematic Symbol for Multiplexer Truth Table for 2 to 1 Multiplexer Presentation title 20XX 3
  4. 4. 4 to 1 Multiplexer Circuit Presentation title 20XX 4
  5. 5. Types of Multiplexer Presentation title 20XX 5
  6. 6. Frequency Division Multiplexing Frequency Division Multiplexing is a technique which uses various frequencies to combine many streams of data for sending signals over a medium for communication purpose. It carries frequency to each data stream and later combines various modulated frequencies to transmission.Television Transmitters are the best example for FDM, which uses FDM to broad cast many channels at a time. In this type of multiplexing, signals are generated by sending different device-modulated carrier frequencies, and these modulated signals are then combined into a single signal that can be transported by the link. Presentation title 20XX 6
  7. 7. Wavelength Division Multiplexing • Wavelength Division Multiplexing (WDM) is analog multiplexing technique and it modulates many data streams on light spectrum. This multiplexing is used in optical fiber. It is FDM optical equivalent. Various signals in WDM are optical signal that will be light and were transmitted through optical fiber.WDM similar to FDM as it mixes many signals of different frequencies into single signal and transfer on one link.Wavelength of wave is reciprocal to its frequency, if wavelength increase then frequency decreases.Several light waves from many sources are united to get light signal which will be transmitted across channel to receiver. Presentation title 20XX 7
  8. 8. Time Division Multiplexer • TDM is one of types of multiplexers which join data streams by allotting every stream different time slot in a set. It frequently transfers or sends various time slots in an order over one transmission channel. TDM attaches PCM data streams. Presentation title 20XX 8
  9. 9. Dense Wavelength Division Multiplexer • In Dense Wavelength Division Multiplexing, an optical technology used to expand bandwidth onto fiber optic. Bit rate and protocol are independent and these are the main advantage of DWDM. • Dense Wavelength Division Multiplexing (DWDM) operated by combining different signals simultaneously at different wavelengths. On fiber is changed to multiple fibers. By increasing the carrier capacity of fiber from 2.5Gb/s to 20 Gb/s, an eight OC 48 signals can be multiplexed into single fiber . Single fibers are able to transfer data at a speed upto 400 GB/s due to DWDM • .DWDM transfers data or information in IP, SONET, ATM and Ethernet It also carries different type of traffic at a range of speeds on an optical channel. Presentation title 20XX 9
  10. 10. Statistical Multiplexer • It allows to share a single line of data for multiplexer RS-232 devices. Error correction will be performed in order to ensure the transmission an error- free one. The word “Statistical” refers to its capability to receive advantage of statics of many RS-232 devices means terminal and PC users.Each PC averages less than 5% of its potential data rate. • This type of multiplexer permits the sum of terminal and PC rates in which it extends composite link speed between multiplexers. This is due the reason that the keyboards are idle. These types of multiplexers requires buffer. Presentation title 20XX 10
  11. 11. Applications of Multiplexers A Multiplexer is used in numerous applications like, where multiple data can be transmitted using a single line. • Communication System – A Multiplexer is used in communication systems, which has a transmission system and also a communication network. A Multiplexer is used to increase the efficiency of the communication system by allowing the transmission of data such as audio & video data from different channels via cables and single lines. • Computer Memory – A Multiplexer is used in computer memory to keep up a vast amount of memory in the computers, and also to decrease the number of copper lines necessary to connect the memory to other parts of the computer. • Telephone Network – A multiplexer is used in telephone networks to integrate the multiple audio signals on a single line of transmission. • Transmission from the Computer System of a Satellite: A Multiplexer is used to transmit the data signals from the computer system of a satellite to the ground system by using a GSM communication. Presentation title 20XX 11

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