Cellphone Powerpoint

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Transcript of Cellphone Powerpoint

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    How Does a Cell Phone Work?By Jaki

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    Introduction

    Welcome to my slide show! If you are likemany other Americans in the twenty-firstcentury you most likely use a type of

    sophisticated radio, commonly known as acell phone.But have you ever reallywondered how a cell phone works? How youcan have a simple conversation with

    someone? How you can be directed from onecall to another? Well if you read into thiswebsite it will surely explain these question. Ihope you enjoy! =]

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    science

    Mainly started for business people. Estimated that at leastOne member from each family owns a cell phone in theUnited States. Cell phones are defined as a sophisticatedradio, or a wireless communication tool that uses, cells,

    base station, and a cell phone tower for each call. There aremany amounts of cells that use extensive frequencies thatallow many people to use cell phones at the same time.During a call its traveled from base station to base stationsit goes from cellto cell. Cell phones also use a short waveanalog or a digital telecommunication where a subscriberhas a wireless connection from mobile telephone torelatively nearby transmitter and a receiver in the basestation.

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    and more science

    The main part of a cell phone is the cellwhich is a system inside the phone. The

    system divides an area of cells into groups ofcells on a hexagonal grid form. The cellphone connects to towers, then connects youto land based telephone system route call.

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    .And Some More Science

    When you turn a phone on the first thing it does isit listens for certain frequencies(control channel)that the phone and tower use to connect. But if

    there is no control channel in that area it saysno

    service.The second thing that the phone does istransmits a registration request, for the MTSOtokeep track of your location on your phone. It does

    this because it needs to know what cell phone yourare so it will ring when someone calls you. Thethird thing it does is the MTSO looks for you in itsdatabase.

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    ....And more science

    The fourth is the MTSO chooses afrequency pair for your phone to use inthe cell to take the call. The fifth is theMTSO connects and communicates withyour phone telling it what frequencies to

    use and when the phone and tower willbegin these frequencies, and then youare connected. The sixth and final asyou start to use up all of the cell the

    tower takes note of the dying cell, thismeans its time for the control channel toplace you with another cell.

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    Radio waves

    Radio waves can vary in different sizes. Theyrange from football fields to footballs. Its job is

    to carry signals for your cell phone. For cellphones mainly they are used to transmitinformation. They vary form being a lotsmaller than normal television waves.

    Whenever you make a call on your cell phoneyour voice is encoded and made into radiowaves that are transmitted by the antennaeon your cell phone and it goes to the nearestbase station.

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    Photos

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    VocabularyCell- is a system inside the phone it divides an area of cells into groups of cellson a hexago nal grid format.

    Tower- cell phone towers are solitary struc tures. They transmit radio wavesand must be placed above ground.

    Frequencies- These can allow thousands of mobile users to share channels.

    MTSO- each carrier in each city runs what is called a central office. known

    as the Mobile Telephone Switching Office

    Dying cell- Is when its time for the control channel to place you with anothercell.

    Radio waves- transmit information by the intennae and goes to a basestation

    G h

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    GraphHow Does a Cell Phone Work

    8

    4

    6

    2

    0

    1

    2

    3

    4

    5

    6

    7

    8

    9

    Dont know incorrect portonally correct correct

    Adult responces

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    The previous graph contains the information

    that I collected from my question.

    I asked twenty adults if they knew how a cellphone works.

    The results were on the previous slide.

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    Related links

    MRS. Pecks Website Biggie Questions

    How stuff works

    Physics of Cell Phones

    This site gave me through and

    clear information about my

    topic.

    This site gave me the

    codesbehind the science

    of a cell phone.

    This site gave me step-

    by-step information, on

    how a cell phone works.

    NASA

    This Website gave me clear

    information on how radio wavesare used by cell phones

    How cell phones work

    http://w3.shorecrest.org/~Lisa_Peck/LPeck.htmlhttp://w3.shorecrest.org/~Lisa_Peck/LPeck.htmlhttp://w3.shorecrest.org/~Lisa_Peck/Physics/Biggie_Project/Biggie_question_project.htmlhttp://www.howstuffworks.com/cell-phone1.htmhttp://www.yale.edu/ynhti/curriculum/units/2003/4/03.04.07.x.htmlhttp://imagers.gsfc.nasa.gov/ems/radio.htmlhttp://www.howstuffworks.com/cell-phone.htmhttp://www.howstuffworks.com/cell-phone.htmhttp://imagers.gsfc.nasa.gov/ems/radio.htmlhttp://www.yale.edu/ynhti/curriculum/units/2003/4/03.04.07.x.htmlhttp://www.howstuffworks.com/cell-phone1.htmhttp://w3.shorecrest.org/~Lisa_Peck/Physics/Biggie_Project/Biggie_question_project.htmlhttp://w3.shorecrest.org/~Lisa_Peck/LPeck.html