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Konparezon FM ak AM
"An menm tan an nan modulation faz, frekans lan pral definitivman chanje, men faz la pa pral nesesèman chanje pandan modulation frekans." Fòmilasyon an pa kòrèk. Tou de modulation frekans ak modulation faz yo se ang modulation, kidonk faz la dwe chanje pandan modulation frekans.
FM kapab reyalize tou yon bann frekans trè etwat, sa yo rele FM etwat la. Pleasant la nan FM etwat se menm jan ak modulation anplitid.
Modulation anplitid: modulation siyal la lakòz anplitid konpayi asirans lan chanje; ak modulation frekans: chanje frekans lan oswa faz kòmsadwa. Transmèt-FM, resevwa-AM: Li ta dwe resevwa nan sèten kondisyon, men efikasite nan deteksyon se pa nesesèman segondè. Pou egzanp: lè reseptè a (modulation anplitid) bouk se nan eta a nan deteksyon pant pou siyal la FM (al gade enfòmasyon radyo ki gen rapò), ka siyal la FM resevwa ensufizaman.
Frekans modulation ak modulation faz yo diferan. Pandan ke modulation faz, frekans lan pral definitivman chanje, men faz la pa pral nesesèman chanje pandan modulation frekans.
1. FM gen pi bon kapasite anti-entèferans pase AM
Enfliyans divès kalite entèferans ekstèn, endistri pwosesis ak entèferans syèl-elektrik, elatriye sou vag modulation la sitou manifeste nan jenerasyon modulation anplitid parazit ak fòmasyon bri. Sistèm modulation frekans lan ka itilize metòd pou limite anplitid pou elimine modulation anplitid parazit ki te koze pa entèferans. Nan sistèm AM la, anplitid siyal anplitid-modile a varyab, kidonk anplitid limite pa ka itilize, e li difisil pou elimine entèferans ekstèn.
Anplis de sa, pi gwo rapò a siyal-a-bri nan siyal la, pi fò nan kapasite nan anti-entèferans. Rapò siyal-a-bri nan siyal la jwenn apre demodulasyon ki gen rapò ak koyefisyan nan modulation. Pi gwo a koyefisyan nan modulation, pi gwo a rapò a siyal-a-bri. Depi koyefisyan modulation frekans lan pi gwo pase koyefisyan modulation anplitid la, rapò siyal-a-bri nan vag FM la wo, ak bri entèferans nan difize FM a piti.
2. FM vag rapò AM vag frekans frekans
Pleasant frekans lan ki gen rapò ak koyefisyan modulation, se sa ki, koyefisyan modulation se gwo ak Pleasant frekans lan lajè. Nan FM, koyefisyan modulation frekans lan souvan pi gran pase 1, ak koyefisyan modulation anplitid la mwens pase 1. Se poutèt sa, Pleasant frekans vag modulation frekans lan pi gwo pase sa vag modulation anplitid la.
3. Itilizasyon pouvwa sistèm FM pi gran pase sistèm AM
Nan pouvwa a transmisyon total, pouvwa a frekans bò se pouvwa a efikas nan siyal la modulation transmèt, ak pouvwa a frekans bò ki gen rapò ak koyefisyan nan modulation, koyefisyan nan modulation se gwo, ak pouvwa a frekans bò se gwo. Depi koefisyan modulation frekans mf la pi gran pase koyefisyan modulation anplitid ma, to itilizasyon pouvwa sistèm modulation frekans lan pi wo pase sistèm modulation anplitid la.
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es.fmuser.org
it.fmuser.org
fr.fmuser.org
de.fmuser.org
af.fmuser.org -> Afriken
sq.fmuser.org -> Albanyen
ar.fmuser.org -> Arab
hy.fmuser.org -> Armenian
az.fmuser.org -> Azerbaydjan
eu.fmuser.org -> Basque
be.fmuser.org -> Belarisyen
bg.fmuser.org -> Bulgarian
ca.fmuser.org -> Katalan
zh-CN.fmuser.org -> Chinwa (senplifye)
zh-TW.fmuser.org -> Chinwa (Tradisyonèl)
hr.fmuser.org -> Kwoasyen
cs.fmuser.org -> Czech
da.fmuser.org -> Danwa
nl.fmuser.org -> Olandè
et.fmuser.org -> Estonyen
tl.fmuser.org -> Filipino
fi.fmuser.org -> Finnish
fr.fmuser.org -> Franse
gl.fmuser.org -> Galisyen
ka.fmuser.org -> Georgian
de.fmuser.org -> Alman
el.fmuser.org -> Greek
ht.fmuser.org -> Kreyòl ayisyen
iw.fmuser.org -> ebre
hi.fmuser.org -> Hindi
hu.fmuser.org -> Hungarian
is.fmuser.org -> Icelandic
id.fmuser.org -> Endonezyen
ga.fmuser.org -> Ilandè
it.fmuser.org -> Italyen
ja.fmuser.org -> Japonè
ko.fmuser.org -> Koreyen
lv.fmuser.org -> Latvian
lt.fmuser.org -> Lithuanian
mk.fmuser.org -> Masedwan
ms.fmuser.org -> Malay
mt.fmuser.org -> Maltese
no.fmuser.org -> Norwegian
fa.fmuser.org -> Pèsik
pl.fmuser.org -> Polonè
pt.fmuser.org -> Pòtigè
ro.fmuser.org -> Romanian
ru.fmuser.org -> Ris
sr.fmuser.org -> Sèb
sk.fmuser.org -> Slovak
sl.fmuser.org -> Slovenian
es.fmuser.org -> Panyòl
sw.fmuser.org -> Swahili
sv.fmuser.org -> Syèd
th.fmuser.org -> Thai
tr.fmuser.org -> Tik
uk.fmuser.org -> Ikrenyen
ur.fmuser.org -> Oudou
vi.fmuser.org -> Vietnamese
cy.fmuser.org -> Welsh
yi.fmuser.org -> Yiddish
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