LAPORAN PRAKTIKUM LABORATORIUM SISTEM TELEKOMUNIKASI SEMESTER III TH 2015/2016
JUDUL
AMPLITUDE MODULATION
GRUP
2
3B PROGRAM STUDI TEKNIK TELEKOMUNIKASI TELEKOMUNIKASI
JURUSAN TEKNIK ELEKTRO
POLITEKNIK NEGERI NE GERI JAKART JA KARTA A 2015 PEMBUAT LAPORAN
:
KELOMPOK 2
NAMA PRAKTIKAN
:
1. Dwi Ana Ama! R"#i$"% 2. &a!ian'i R()*i%a+," 3. &ai!-)ia A-'i,ia Ami! . &(!i Ha!an," 5. Hanna %ama' Aai'i
TGL. SELESAI PRAKTIKUM
: Kami+4 3 S(,(m(! 2015
TGL. PENYERAHAN LAPORAN
: Kami+4 10 S(,(m(! 2015
NILAI
:
KETERANGAN
:
DAFTAR ISI
2|Page
DA&TAR ISI.3 1. 2. 3. . 5. 6. . 9.
TU7UAN DIA8RAM RAN8KAIAN... ALAT DAN KOMPONEN...5 DASAR TEORI.5 LAN8KAH KER7A DAN DATA PEROBAAN...9 ANALISA DATA.1 KESIMPULAN.15 RE&ERENSI.16
AMPLITUDE MODULATION (AM) I.
TUJUAN
3|Page
1. M(nami*an (n,-* +ina AM 2. M(n(n,-*an in'(*+ m"'-a+i '(n;an "a ,!a()i-m 3. M(n(a+*an aa an; 'i+(-, "<(! m"'-a+i 'an 'i+,"!+i m"'-a+i 'a!i +ina AM II.
DIAGRAM RANGKAIAN
III.
ALAT DAN KOMPONEN
N".
Aa,
7-ma%
1
D P"w(! S- =15> ?SO35399D@
1
2
& T!an+mi,,(!4 16KH) ?SO3539H@
1
3
&-n,i"n 8(n(!a,"! ?8INSTEK 8&8C210@
1
4|Page
O+i"+"( ?8INSTEK 8OS6538@
1
5
Uni<(!+a "-n,(! ?HP531A@
1
6
BN ," Banana a(
7-m(! P-;in (+a!
15
IV.
DASAR TEORI
1. Pengert!n M"#$%!&
M"'-a+i m(!-a*an !"+(+ m(n;-a%-a% a!am(,(! +-a,- +ina ?+ina (mawa a,a- a!!i(!@ '(n;an m(n;;-na*an +ina an; ain ?ai,- +ina (m"'-a+i an; (!-a +ina in#"!ma+i@. Sina in#"!ma+i 'aa, (!(n,-* +ina a-'i"4 +ina
Pa'a m"'-a+i ami,-'"4 +ina (m"'-a+i a,a- +ina in#"!ma+i m(n;-a%-a% ami,-'" +ina (mawa. B(+a!na ami,-'" +ina (mawa a*an (!an'in; -!-+ '(n;an ami,-'" +ina (m"'-a+i.
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Gambar
4.1.
Bentuk
Proses Modulasi AM
&!(*-(n+i +ina (m"'-a+i ia+ana m(!-a*an +ina a'a !(n,an; #!(*-(n+i a-'i" ?A&4 A-'i" &!($-(n@ ai,- an,a!a 20 H) +amai '(nan 20 *H). S('an;*an #!(*-(n+i +ina (mawa ia+ana (!-a +ina !a'i" ?R&4 Ra'i" &!($-(n@ a'a !(n,an; #!(*-(n+i ,(n;a% ?M&4Mi'&!($-(n@ ai,- an,a!a 300 *H) +amai '(n;an 3 M%). Un,-* m(m(!m-'a% (ma%a+an4 %ana a*an 'i'i+*-+i*an m"'-a+i '(n;an +ina +in-+. 7i*a +ina (m"'-a+i 'ina,a*an +(a;ai (m >m +in m , 'an +ina (mawana 'ina,a*an +(a;ai ( > +in , 4 ma*a +ina %a+i m"'-a+i 'i+(-, +ina ,(!m"'-a+i a,a- (AM. B(!i*-, ini a'aa% anai+i+ +ina ,(!m"'-a+i AM. (AM
> ?1 F m +in m, @ +in , > .+in , F m . >. +in , . +in m , > .+in , F G m.> . "+ ? m@ , G m.>."+? F m@ ,
D(n;an : (AM
: +ina ,(!m"'-a+i AM
(m
: +ina (m"'-a+i
(
: +ina (mawa
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>
: ami,-'" ma*+im-m +ina (mawa
>m
: ami,-'" ma*+im-m +ina (m"'-a+i
m
: in'(*+ m"'-a+i AM
: #!(*-(n+i +-'-, +ina (mawa ?!a'ian/'(,i*@
m
: #!(*-(n+i +-'-, +ina (m"'-a+i?!a'ian/'(,i*@ H--n;an an,a!a #!(*-(n+i +ina 'aam %(!,) '(n;an #!(*-(n+i +-'-, 'ina,a*an
+(a;ai: 2 # K"m"n(n (!,ama +ina ,(!m"'-a+i AM ?> +in ,@ 'i+(-, *"m"n(n (mawa4 *"m"n(n *('-a ? ai,- G m.> ."+? m@ , @ 'i+(-, *"m"n(n i'an; +i+i awa% a,aLSB (Lower Side Band) 'an *"m"n(n *(,i;a ? ai,- G m.> ."+? F m@ , @ 'i+(-, *"m"n(n i'an; +i+i a,a+ a,a- USB (Upper Side Band). K"m"n(n (mawa m(m-nai #!(*-(n+i +-'-, +((+a! 4 *"m"n(n LSB m(m-nai #!(*-(n+i +-'-, +((+a! m4 'an *"m"n(n USB m(m-nai #!(*-(n+i +-'-, +((+a! F m.
G am ba r 4.2. Sinal Pemodulasi
Gambar 4.!. Sinal Pembawa
Gambar 4.4. Sinal "ermodulasi AM
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Gambar 4.#. Spektrum $rekuensi Sinal "ermodulasi AM *. In#e+& M"#$%!&
In'(* m"'-a+i a'a AM m(!-a*an (!an'in;an an,a!a ami,-'" +ina (m"'-a+i '(n;an ami,-'" +ina a!!i(!. In'(*+ m"'-a+i ia+a 'i+im"*an '(n;an m4 (!+amaanna +(a;ai (!i*-, : m % m / % & Niai in'(*+ m"'-a+i -;a 'aa, 'ina,a*an 'aam (!+(n4 ai,- '(n;an m(n;ai*an m '(n;an 100 : m % m / % & ' 1 *?t @ % & ?1 F m +in wm t @ +in w& t V.
LANGKAH KERJA DAN DATA PER,OBAAN
>.1. B-a, !an;*aian +((!,i a'a ;ama! 'i awa% ini ?+a*a! +wi,% *( AM@ :
Da!i &-n,i"n 8(n(!a,"! ma+-**an *( in-, miJ(! ?2@
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8("man; +in-+ 1KH) >L&
2 >PP ?>",a;( "w #!($-(n@
8ama! %a+ina a'a in-, miJ(! ?2@ 'an "-,-, miJ(! ?3@
TP 2
TP 3
A 2 >PP & 1KH) 1
>maJ
2
1
x Vpp= x 2=1 Vpp 2
>min 0
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8ama! TP3 'i a,a+ a'aa% ;ama! +ina ter"#$%!& AM 8(!a**an +ina L& ?"w #!($-(n@ a'a TP2 *( upper en*elope4 (a+*an P!#! TP'- +et+! &n!% e"#$%!& #ger!++!n en$/$ upper envelope !#!
&n!% e0!! (2!rrer)- !+! &n!% e"#$%!& !#!%!3 &e&$! #eng!n 0ent$+ &n!% e0!! (2!rrer)- &e3ngg! &!!t #&!t$+!n !+!n ter0ent$+ &n!% ter"#$%!& AM.
Aa an; ,(!i%a, i*a L& (!-a%4 (a+*an Y!ng ter%3!t !#!%!3 !!0%! 4re+$en& #0$!t &e!+n 0e!r- !+! /!r!+ !nt!r! #$! 0$+t #!n !t!$ #$! %e0!3 !#! ge%"0!ng !+!n &e!+n #e+!t. Se3ngg! 0ent$+ ge%"0!ng !ng ter%3!t &e!+n &et.
Li+at Gambar "P!
m
D(n;an m(n-*-! ma*+im-m 'an minim-m +ina AM4 %i,-n; in'(* m"'-a+i
Upp max + Uppmin Upp max −Uppmin J 100
3,4 + 0
3,4 −0
x
100
100 >.2 Pin'a%*an "-,-, #-n,i"n ;(n(!a,"! 'a!i in-, miJ(! ?2@ *( in-, #i,(! ?1@
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8ama! Ha+ina:
TP 1
TP 3
A 2 >PP & 1KH) 1
>maJ
2
1
x Vpp= x 2=1 Vpp 2
>min 0
B(!i*an ((a+an ,(n,an; *('-a ;ana! 'ia,a+ :
Set! &n!% !ng e%!%$ 4%ter !+!n eng!%! erge&er!n +!ren! !#!n! 0e#! 4!&!
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>.3 M"'-a+i T!a(+i-m In-, miJ(! ?2@ *( *ana 1 "+i"+*" O-,-, miJ(! ?3@ *( *ana "+i"+*" O+i"+*" m"'( Ua% ami,-'( #-n,i"n ;(n(!a,"! 'a!i 2 > *( 6 > *(m-'ian *( 9 > 8ama! %a+ina:
>L& 6 > >maJ G > G . 6 3 > >min 34 >
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>L& 9 > >maJ G > G . 9 > >min 542 >
Ama,i +i+i +amin; ,!a()i-m4 7(a+*an : S& tr!e5$ #!!t #g$n!+!n $nt$+ eer$#!3 e%3!t 0e&!rn!
!%t$#" !+&$ #!n n$. A%t$#" !+&$ #!!t #%3!t #!r && !ng %e03 !n/!ng &e#!ng+!n !%t$#" n$ #!!t #%3!t #!r && !ng %e03 en#e+. Se3ngg! #!!t %e03 $#!3 eng3t$ng 0e&!rn! n#e+& "#$%!&.
Ba;aimana ia >L& 9>4 7(a+*an: B%! VLF 6 7V !+! !+!n ter/!# "8er "#$%!t"n +!ren! 3!rg! n#e+& "#$%!& %e03 #!r 199:. J!# &e!+n 0e&!r V !+! !+!n &e!+n 0e&!r n#e+& "#$%!&n!.
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VI.
ANALISA DATA
Pa'a (!"aan '(n;an -'- Ami,-'" M"'-a,i"n an; (!,--an - n, -*
m (n am i * an
(n ,- * + in a AM
' (n ;a n m (n ;; -n a* an
& -n , i" n
8(n(!a,"! an; (!;-na -n,-* m(n;%a+i*an (n,-* +ina a,a- ;("man; an; 'i;-na*an +(a;ai ;("man; in#"!ma+i a,a- L"w &!($-(n ?L&@. Sina an; m(m-nai #!(*-(n+i ,in;;i ?Hi;% &!($-(n/H&@ m(!-a*an +ina (mawa4 'an an; m(m-nai #!(*-(n+i !(n'a% ?L&@ m(!-a*an +ina in#"!ma+i. Daam (n;(!,ianna4 m"'-a+i (!a!,i (n-man;an +ina in#"!ma+i ?++ina "w #!(-(n @ *( +ina (mawa ?+ina an; m(m-nai ,in;;i@. Pa'a (!"aan (!,ama4 &-n,i"n 8(n(!a,"! 'ima+-**an *( in-, miJ(! 2 'an 'ia,-! ;-na m(n;%a+i*an ;("man; '(n;an #!(*-(n+i 1 *H) '(n;an ,(;an;an 2 >4 +(%in;;a m(n;%a+i*an (n,-* ;("man; (m"'-a+i a'a O+i"+*" ?TP2@. 8("man; (m"'-a+i ,(!+(-, 'im"'-a+i*an '(n;an ;("man; (mawa ?a!!i(!@ 'an a*an m(n;%a+i*an ;("man; ,(!m"'-a+i/;("man; "-,-, ?TP3@ a'a O+i"+*". Pa'a ;ama! ;("man; "-,-,4 'aa, 'i*a,a*an a%wa +i+i a;ian a,a+ 'an awa% i,a #!(*-(n+i an; ,(!i%a, m(!-a*an (n,-* ;("man; in#"!ma+i an; 'im"'-a+i*an '(n;an +ina (mawa an; #!(*-(n+ina (i% (+a!. Da!i ;ama! ,(!+(-, ?TP3@ 'aa, 'i*a,a*an
a%wa +ina
,(!m"'-a+i 'i%a+i*an '(n;an a!a 'i;a-n;*anna +ina in#"!ma+i an; (!a'a a'a ami,-'( "+i,i# ?a,a+@ 'an ami,-'" n(;a,i# ?awa%@ 'a!i +ina (mawa. Pa'a '-a +i+i an' ,(!+(-, +ina (mawa 'i,-man;*an "(% +ina in#"!ma+i. &!(*-(n+i 'a!i +ina in#"!ma+i an; m(n-man; a'a +ina (mawa ,i'a* m(n;aami (!-a%an +aa, !"+(+ m"'-a+i. Sina in#"!ma+i 'im"'-a+i '(n;an m(!-a% -a% niai ami,-'(na. 7a'i Ami,-'" ;( " m an ;
'a!i
;("man;
in #" !m a+ i.
( m a wa S( ma *i n
' i ( n ;a ! - % i
"(%
A m i , - ' "
,in;;i/(+a! Ami,-'" 'a!i ;("man;
in#"!ma+i ?L&@4 ma*a +(ma*in ,in;;i -a Ami,-'" ;("man; (mawa ?H&@. 8("man; +ina ,(!m"'-a+i 'aa, 'i;-na*an -n,-* m(n;-*-! ma*+im-m 'an minim-m +ina AM ma*a m(n;%a+i*an in'(*+ m"'-a+i. In'(*+ m"'-a+i an; 'i'aa, a'a (!"aan ini a'aa% 100 . ma*a *(a'aan in'(*+ m"'-a+i ini a'aa% ,i'a* ai* ?*!i,i+@.
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Pa'a (!"aan *('-a '(n;an m(min'a%*an "-,-, #-n,i"n ;(n(!a,"! 'a!i in-, miJ(! 2 *( in-, #i,(! 1 a*an m(n;%a+i*an (n,-* ;("man; +ina ami,-'" a-'i" a'a TP1 ?+ina (m"'-a+i@. T(,ai a'a TP3 ?;("man; ,(!m"'-a+i/;("man; "-,-,@ 'aa, 'ii%a, a%wa a;ian +i+i a,a+ 'an +i+i awa% i,a #!(*-(n+i an; ,(!i%a, ,i'a* +(aa! '(n;an (n,-* ;("man; in#"!ma+i an; 'im"'-a+i*an '(n;an +ina (mawa an; #!(*-(n+ina (i% (+a!. Ha ,(!+(-, 'i*a!(na*an a'ana #i,(! a'a +ina in#"!ma+i. 7a'i4 i*a +ina in#"!ma+i m((wa,i #i,(! ma*a +ina (mawa 'an +ina ,(!m"'-a+i a*an m(n;aami (!;(+(!an *a!(na a'ana ('a #a+a. Pa'a (!"aan *(,i;a '(n;an m(n(n,-*an m"'-a+i ,!a()i-m4 #-n,i"n ;(n(!a,"! 'ia,-! '(n;an (n,-* ;("man; +in-+ 2> a*an m(n;%a+i*an (n,-* ;("man; a'a "+i"+*" '(n;an in'(*+ m"'-a+i +((+a! 100 a'a "+i"+*". Ha ,(!+(-, 'aa, 'i*a,a*an a%wa Ami,-'" minim-m a*an m(n;(i 'anm(naai niai n". 7i*a niai Ami,-'" minim-m ?> Min@ m(naai niain"4 ma*a ;("man; 'aam *(a'aan m"'-a+i *!i,i+ ?in'(*+ m"'-a+i 100 @. 7 i * a A m i , - '" ; ( " m a n ; i n # " !m a + i ' i n a i ** a n ? 6 > @ 4 ma*a
(n,-*
" +i " +* "
;("man;
' (n ;a n
4
a'a
" +i " +* "
; ( "m a n;
a *a n
a *a n
(! - a %. .P a' a
m (m ( n, -*
+ ( (! ,i
2
+(;i,i;a an; +ain; (!+ian;an. K(,i*a Ami,-'" ;("man; in#"!ma+i ? L& @ ' in ai* *a n a; i m (n aa i 9 >4 ma *a (n ,-* ; ( " m a n ; "+ i "+ *" a*a n m( n a' i a a ,. Am i, -'" a, a+
a' a
?En<("( U(!@
'an Ami,-'" awa% ?En<("( L"w(!@ a*an (!+ian;an. Ni ai > Mi n a*a n m(na'i n(;a,i#. A*ia,na4 in'(*+ m"'-a+i m(na'i (i% 'a!i 100 ?m Q 100 @. K"n'i+i ini 'i+(-, O<(! M"'-a,i"n. VII.
KESIMPULAN Pa'a AM4 Ami,-'" ;("man;;("man; a*an 'i(n;a!-%i "(%
ami,-'" ;("man; in#"!ma+i. B(+a!na in'(*+ m"'-a+i m(m(n;a!-%i aa, a,a- ,i'a*na +ina in#"!ma+i an; 'im"'-a+i '(n;an +ina (mawa. Pa'a +aa, in'(*+ m"'-a+i 100 ?m100@ 'i+(-, M"'-a+i K!i,i+. Pa'a +aa, in'(*+ m"'-a+i *-!an; 'a!i 100 ?m100@ a'aa% *"n'i+i ,(!ai* *a!(na 'i%a+i*an (n,-* ;("man; ,(!m"'-a+i an; ,i'a* aa,.
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S(ma*in (+a! +ina (mawa #!(*-(n+i ,in;;i an; 'im"'-a+i*an "(% +ina #!(*-(n+i !(n'a% ma*a +(ma*in (+a! -a %a+i m"'-a+ina. VIII. REFERENSI 1. +ttp,--aun/&bernet.blospot.&o.id-21!-0-ma&am/ma&am/modulasi/analo/ dan/diital.+tml M"'-a+i ana"; a'aa% m"'-a+i 'imana +ina ma+-*anna a'aa% +ina ana";. M"'-a+i ana"; a'aa% *"m-ni*a+i an; m(n,!an+mi+i*an +ina+ina ana"; ai,- ,im( +i;na an; (!a'a a'a niai *"n,in- a'a in,(!
AM a,a- m"'-a+i ami,-'" a'aa% +-a,- m"'-a+i 'imana ami,-'" +ina a!!i(!(!-a% +(+-ai *(a*-an 'a!i ami,-'" +ina in-,. A'a-n #!(*-(n+i 'an #a+a +ina a!!i(! a'a AM ,i'a* (!-a%. B(!'a+a!*an (n,-* *(-a!anna4 %a+i AM a'a ,i;a maam. B(n,-* *(-a!an 'i,(n,-*an "(% +(-a% *"(#i+i(n in'(*+ m"'-a+i.
2. +ttp,--elektronika/dasar.web.id-teori/elektronika-modulasi/amplitudo/amplitude/
modulation/am- In'(J m"'-a+i m(!-a*an -*-!an +((!aa 'aam +ina in#"!ma+i m(m"'-a+i +ina (mawa. Aaia in'(J m"'-a+i ,(!a- (+a! ?mQ1@ ma*a %a+i +ina ,(!m"'-a+i AM a*an aa, 'an aaia in'(J m"'-a+i ,(!a- !(n'a% ?m1@ ma*a 'aa +ina ,(!m"'-a+i ,i'a* ma*+ima.
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K"n'i+i
in'(*+ m"'-a+i m 1 a'aa%
*"n'i+i i'(a4 'imana !"+(+ m"'-a+i ami,-'" m(n;%a+i*an "-,-, ,(!(+a! 'i (n(!ima ,ana 'i+,"!+i. S(*,!-m +ina AM 'aa, 'i;ama!*an +(a;ai (!i*-,:
Gambar spe&trum sinal AM
A'a ((!aa
*(,i*a 6 94 Em 04 ma*a +ina ,(!m"'-a+i a'aa% +ama +((!,i +ina a!!i(! ?+((-m m"'-a+i@
Gambar m
•
*(,i*a 9 ; ;14 niai ini an; ,(!a'i 'aam *"n'i+i na,a. R(+-,an ;("man; +(ma*in ,(!i%a, +i;ni#i*an *(,i*a niai m m(n'(*a,i 1.
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Gambar. •
m#
*(,i*a
614
m(!-a*an *"n'i+i i'(a. Sina ,(!m"'-a+i an; ain; ai* 'i%a+i*an i*a niai m1. T(,ai *"n'i+i ini +-*a! 'iaai *a!(na *(,(!a,a+an aa,4 ,(!-,ama *(n'aa n"i+(.Pa'a niai m 14 ami,-'" -na* +ia ,(!m"'-a+i a*an (!
+amai '-a *ai ami,-'" +ina a!!i(! ?+((-m m"'-a+i@.
Gambar m 1 •
*(,i*a < 14 a'a *"n'i+i ini 'i*a,a*an ,(!a'i "<(!m"'-a+i. O<(!m"'-a+i a*an m(n;%a+i*an 'i+,"!+i a'a +ina ,(!m"'-a+i4 'an (n<("( +ama +(*ai (!('a (n,-*na '(n;an +ina in#"!ma+i/(m"'-a+i.
Gambar m 1#
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Perhitungan Indeks Modulasi :
Da!i 8ama! ,(!+(-, +ina ,(!m"'-a+i 'i'aa, !-m-+:
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