Rajesh Ppt 13.10

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    PRESENTATION

    ON

    INDUSTRIAL SUMMER TRAININGAT

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    ALL INDIA RADIO

    (AIR) HAS BEEN

    SERVING TO INFORM,

    EDUCATE AND

    ENTERTAIN THE MASSESSINCE IT'S INCEPTION,

    TRULY LIVING UP TO ITS

    MOTTO BAHUJAN

    HITAYA: BAHUJANSUKHAYA.

    MISSION

    WELCOME TO PRASAR BHARTI

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    In June 1923 the Radio Clu o! "o#a$

    #ade the !i%&t e'e% %oad(a&t in the(ount%$

    The Indian "%oad(a&tin) Co#*an$ +I"C,

    (a#e into ein) on Jul$ 23- 192.

    The te(hnolo)$ ado*ted i& the Di)ital Radio

    Mondiale o% DRM/ 0ith the ta%)et o! (o#*lete

    di)itiation $ 21.

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    AIR& ho#e &e%'i(e (o#*%i&e& 2..

    &tation& toda$ lo(ated a(%o&& the (ount%$/

    Rea(hin) nea%l$ 924 o! the (ount%$&

    a%ea and 99/19 4 o! the total *o*ulation/

    AIR o%i)inate& *%o)%a##in) in 23lan)ua)e& and 156 diale(t&

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    1 4 Andh%aP%ade&h- "iha%-Chhati&)ah- Delhi- Goa-7a%$ana- Jha%8hand-a%nata8a- Madh$a

    P%ade&h- Mani*u%-Me)hala$a- O%i&&a-Pondi(he%%$- T%i*u%a-Utta% P%ade&h-Utta%an(hal/

    : 4 ; #o%e than

    A&&a#- Maha%a&ht%a-Ra

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    Title

    = Te>t

    e%

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    Mi(%o*hone

    T%an&%e(ei'e% A#*li!ie% tune%

    Anntena

    e$*addle

    TNC COMPU

    TER

    HOW RADIOS SENDS AND RECEIVE INFORMATIONS

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    PO0ER SUPPL? IN AIR

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    In hi)h *o@e% A/M/ t%anitte%- lot o! *o@e% i&

    di&&i*ated in the 'al'e a& the in*ut *o@e% i& not !ull$

    (on'e%ted into out*ut R//

    *o@e% due to the e!!i(ien($ o! the a#*li!ie% @hi(h

    ne'e% %ea(he& 14/ 7en(e the 'al'e& ha'e to e

    (ooled/

    Di!!e%ent t$*e& o! (oolin) a%e u&ed in AIR

    t%anitte% at *%e&ent/

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    P%a&a% "ha%ati A(t (a#e into e>i&ten(e

    on 23 no' 199.

    It i& the Puli( Se%'i(e "%oad(a&te% o!

    the (ount%$//

    The o

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    To@ &tation& (an u&e a &etellite a& a %ela$&tation !o% thei% (o##uni(ation/

    One ea%th &tation &end& a t%ani&&ion tothe &etellite - thi& i& (alled u*lin8 /

    The &atellite t%an&*onde%(on'e%t& the &i)naland &end& it do@n to the &e(ond ea%th &tation /

    Thi& i& (alled a do@nlin8 /

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    RADIO 0ABE

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    Radio @a'e& a%e a t$*e o! ele(t%o#a)neti(

    %adiation @ith @a'elenth/

    In the ele(t%o#a)neti( &*e(t%u# lon)e% than

    in!%a%ed li)ht

    Radio @a'e& ha'e !%euen($ !%o# 3 G7 to

    a& lo@ a& 3 87

    And (o%%e&*ondin) @a'elen)th& !%o# 1

    #illi#ete% to 1

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    P%o*a)ation #ode& i#a)e&

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    Ni)ht Da$

    Ni)ht Da$

    Radiatio

    %o#

    &un

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    M#$l"%!#n

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    N&&

    #

    M#$l"%!#n

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    Antenna &ie (an e %edu(ed $

    #odulatin) the &i)nal o'e% hi)he%

    !%euen($/

    To di!!e%entiate a#on) t%ani&&ion&+&tation&,

    Ma>i#u# to #ini#u# !%euen($ %atio (ane %edu(ed to #ini#u# $ #odulatin) the

    &i)nal on a hi)h !%euen($/

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    AMPLITUDE MODULATION

    A

    t

    t

    t

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    A

    t

    t

    t

    Modulatin) &i)nal +audio,

    Ca%%ie% &i)nal

    # &i)nal

    FREUENCY MODULATION

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    A

    Modulatin) &i)nal

    Ca%%ie% &i)nal

    P# &i)nal

    t

    t

    t

    P7ASE MODULATION

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