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FM FM transmetè, frekans nan transmèt se nan bann la emisyon analòg 88 ~ 108Mhz, lè l sèvi avèk òdinè radyo FM yo resevwa, 2 kalite opinyon odyo, tèt MIC yo voye son periferik, CK opinyon odyo, reglabl reglabl transmisyon bobin L ka chanje ( amann) pou transmèt frekans.
Figi a montre dyagram sikwi prensip transmetè san fil la. Q1 se yon transfòmatè emeteur komen makonnen sikwi osilasyon: chaj la se yon bobin sub-nivo nan transfòmatè T. Apre siyal la pwodiksyon pèseptè makonnen pa T, se poto segondè a voye nan baz la atravè C1 yo fòme yon Feedback pozitif, vibre . Elektwòd baz la an menm tan an voye yon siyal modulation ba-frekans pou anplitid-modile osilasyon segondè-frekans ki pwodwi a.
Q2 se etap anplifikatè tanpon an, pwodiksyon Q1 makonnen ak baz Q2 ("Q1" sou bò dwat nan figi a) atravè C3, ak L1 se enduktans chaj Q2; epi li voye nan antèn lan pou transmisyon via sikwi sonorite seri C4 / L2 la. R2 chita, se sa ki, zewo patipri. Paske anplitid siyal la opinyon se gwo ak frekans lan chwazi pa kous la sonan C4 / L2, li se pa bezwen pè tout deformation, ki se pi efikas.
Ta dwe gen yon pwen koneksyon nan T, L1 ak 9V. Depi baz sikwi sa a pa gen yon patipri DC, sikwi a ap travay nan anplifikasyon Gwoup C. Faz yo ant prensipal la ak segondè nan T yo opoze, se sa ki, lè pèseptè aktyèl la nan Q1 ogmante, prensipal la pwovoke fòs elektwomobil nan T se pozitif ak kite negatif, ak segondè a jenere pozitif ak negatif pwovoke fòs elektwomobil sou bò gòch la, ak aktyèl la chaje nan C1 ogmante. Lè pèseptè aktyèl la diminye, opoze a se verite. Frekans lan detèmine pa kapasite C1 ak enduktans T.
Transmèt pouvwa pa ka detèmine pa paramèt sa yo kounye a. Se vòltaj la li te ye, men kle a se ke aktyèl la pa li te ye. Kouran (altène aktyèl la) detèmine pa aktyèl la nan Q2 (tranzistò a dèyè li ta dwe Q2), kondwi a nan baz la, ak enpedans la nan L1.
Lè li rive resevwa distans, li gen rapò ak sansiblite reseptè, anviwònman pwopagasyon, wotè antèn, ak antèn genyen. Anjeneral pale, li se tou yon distans ideyal, ak distans aktyèl la se byen diferan.
Prensip debaz yo nan de sikwi yo se menm bagay la. Tou de sikwi yo kontwole pa 0 ak 1 siyal reyalize transmisyon segondè-frekans batman kè. Frekans fonksyònman an detèmine pa osilator kristal la, ak avantaj ak dezavantaj yo pa ka distenge soti nan estabilite an. Kous la nan Figi 2 se pi senp ak pi fasil yo debug. Nan Figi 1, yo ajoute yon rezo seleksyon frekans ant pèseptè triyod la ak ekipman pou pouvwa a, epi yo ajoute yon rezo seleksyon frekans tou ant pèseptè triyod la ak antèn lan. Frekans pwodiksyon an pi bon, men debogaj pi anbarasman. . Yon lòt diferans se ke baz triyod anwo a nan Figi 2 entwodui AC negatif fidbak nan rezistans lan. An reyalite, sa pa gen okenn efè evidan sou estabilite kous la. Li pi bon kenbe kapasite segondè-frekans nan tè sou ekipman pou pouvwa a, men li pa montre nan Figi 2.
lòt pwodwi nou an:
Antre nan imèl yo ka resevwa yon sipriz
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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