FMUSER Wirless Kusambaza Video Na Sauti Ni Rahisi Zaidi!
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eu.fmuser.org -> Kibasque
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et.fmuser.org -> Kiestonia
tl.fmuser.org -> Kifilipino
fi.fmuser.org -> Kifini
fr.fmuser.org -> Kifaransa
gl.fmuser.org -> Kigalisia
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iw.fmuser.org -> Kiebrania
hi.fmuser.org -> Kihindi
hu.fmuser.org -> Kihungari
is.fmuser.org -> Kiaislandi
id.fmuser.org -> Kiindonesia
ga.fmuser.org -> Kiayalandi
it.fmuser.org -> Italia
ja.fmuser.org -> Kijapani
ko.fmuser.org -> Kikorea
lv.fmuser.org -> Kilatvia
lt.fmuser.org -> Kilithuania
mk.fmuser.org -> Kimasedonia
ms.fmuser.org -> Kimalesia
mt.fmuser.org -> Kimalta
no.fmuser.org -> Kinorwe
fa.fmuser.org -> Kiajemi
pl.fmuser.org -> Kipolishi
pt.fmuser.org -> Kireno
ro.fmuser.org -> Kiromania
ru.fmuser.org -> Kirusi
sr.fmuser.org -> Mserbia
sk.fmuser.org -> Kislovakia
sl.fmuser.org -> Kislovenia
es.fmuser.org -> Kihispania
sw.fmuser.org -> Kiswahili
sv.fmuser.org -> Kiswidi
th.fmuser.org -> Thai
tr.fmuser.org -> Kituruki
uk.fmuser.org -> Kiukreni
ur.fmuser.org -> Kiurdu
vi.fmuser.org -> Kivietinamu
cy.fmuser.org -> Kiwelsh
yi.fmuser.org -> Yiddish
tafadhali Bonyeza hapakupata antenna wetu dipole
1, dBm
dBm ni nguvu ya thamani kabisa ishara mtihani ni mahesabu kama: 10lgP (thamani nguvu / 1mw).
[Mfano 1] Kama nguvu maambukizi P ni 1mw, waongofu katika dBm baada ya 0dBm.
[Mfano 2] kwa 40W ya nguvu, kwa mujibu wa dBm thamani ya vipande baada ya kubadilika wanapaswa kuwa:
10lg (40W / 1mw) = 10lg (40000) = 10lg4 + 10 lg10 + 10 lg1000 = 46dBm.
2, DBI na DBD
DBI na DBD ni faida thamani ya mtihani sifa (faida nguvu), wote wawili ambao ni thamani jamaa, lakini si sawa na kiini. kumbukumbu ya DBI Omni-directional antenna, DBD kiini kwa ajili ya dipole, hivyo mbili ni tofauti kidogo. Kwa ujumla kuamini kwamba faida hiyo, na kuwakilishwa na DBI DBD kuliko kuwa nje kwa 2.15 kubwa.
[Mfano 3] Kwa upande wa antenna faida ya 16dBd wake waongofu katika vitengo ya DBI faida ikilinganishwa 18.15dBi (kwa ujumla kupuuza maeneo decimal, kama 18dBi).
[Mfano 4] 0dBd = 2.15dBi.
[Mfano 5] GSM900 antenna faida unaweza 13dBd (15dBi), GSM1800 antenna faida unaweza 15dBd (17dBi).
3, dB
dB ni Tabia ya thamani ya jamaa wa thamani, wakati kuzingatia nguvu ikilinganishwa na B au idadi ndogo ya nguvu kubwa dB, kwa mujibu wa formula yafuatayo: 10lg (nguvu nguvu / B)
[Mfano 6] AB nguvu zaidi kuliko nguvu mara mbili, kisha 10lg (nguvu nguvu / B) = 10lg2 = 3dB. Kwa maneno mengine, nguvu kubwa kuliko B nguvu 3 dB.
[Mfano 7] 7 / 8 inches GSM900 feeder maambukizi hasara ya juu 100 mita ya 3.9dB.
[Mfano 8] Kama nguvu ni 46dBm, nguvu B ya 40dBm, inaweza kuwa alisema kwamba B kubwa kuliko 6 dB.
[Mfano 9] Kama antenna 12dBd, B antenna 14dBd, B inaweza kuwa ni kidogo zaidi ya 2 dB.
4, DBC
Wakati mwingine kuona DBC, pia ni thamani ya jamaa wa alisema kitengo cha nguvu, na dB ni mahesabu sawa. Kwa ujumla, DBC jamaa na carrier (Carrier) katika suala la nguvu, katika kesi nyingi, kutumika kupima thamani ya jamaa wa carrier nguvu, kama vile kutumika kupima kuingiliwa (co-channel kuingiliwa, intermodulation kuingiliwa, crosstalk, na kuingiliwa nje, nk) na pia kama kiungo, kupotea na hivyo thamani jamaa. Nafasi katika matumizi ya DBC, katika kanuni, unaweza pia kutumia dB badala yake.
http://di-an.com.cn/news/article.php?articleid=107
Uzoefu algorithm:
Kuna formula rahisi: 0dbm = 0.001w upande wa kushoto wa kulia na 10 = 10
Kwa hiyo, 0 + 10 DBM = 0.001 * 10W kwamba 10DBM = 0.01W
Ni inaweza kwa hiyo 20DBM = 0.1W 30DBM = 1W 40DBM = 10W
Kuna upande wa kushoto wa kulia na 3 = 2, kama vile 40 + 3 DBM = 10 * 2W, ambayo 43DBM = 20W, ambayo ni formula empirical, faini kutumika.
So-50DBM = 0DBM-10-10-10-10-10 = 1mw/10/10/10/10/10 = 0.00001mw.
tafadhali Bonyeza hapakupata antenna wetu dipole
bidhaa zetu nyingine:
Kifurushi cha Vifaa vya Kitaalam vya Kituo cha Redio cha FM
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Ingiza barua pepe kupata mshangao
es.fmuser.org
it.fmuser.org
fr.fmuser.org
de.fmuser.org
af.fmuser.org -> Kiafrikana
sq.fmuser.org -> Kialbeni
ar.fmuser.org -> Kiarabu
hy.fmuser.org -> Kiarmenia
az.fmuser.org -> Kiazabajani
eu.fmuser.org -> Kibasque
be.fmuser.org -> Kibelarusi
bg.fmuser.org -> Kibulgaria
ca.fmuser.org -> Kikatalani
zh-CN.fmuser.org -> Kichina (Kilichorahisishwa)
zh-TW.fmuser.org -> Wachina (Jadi)
hr.fmuser.org -> Kikroeshia
cs.fmuser.org -> Kicheki
da.fmuser.org -> Kidenmaki
nl.fmuser.org -> Kiholanzi
et.fmuser.org -> Kiestonia
tl.fmuser.org -> Kifilipino
fi.fmuser.org -> Kifini
fr.fmuser.org -> Kifaransa
gl.fmuser.org -> Kigalisia
ka.fmuser.org -> Kijojiajia
de.fmuser.org -> Kijerumani
el.fmuser.org -> Kiyunani
ht.fmuser.org -> Kikrioli cha Haiti
iw.fmuser.org -> Kiebrania
hi.fmuser.org -> Kihindi
hu.fmuser.org -> Kihungari
is.fmuser.org -> Kiaislandi
id.fmuser.org -> Kiindonesia
ga.fmuser.org -> Kiayalandi
it.fmuser.org -> Italia
ja.fmuser.org -> Kijapani
ko.fmuser.org -> Kikorea
lv.fmuser.org -> Kilatvia
lt.fmuser.org -> Kilithuania
mk.fmuser.org -> Kimasedonia
ms.fmuser.org -> Kimalesia
mt.fmuser.org -> Kimalta
no.fmuser.org -> Kinorwe
fa.fmuser.org -> Kiajemi
pl.fmuser.org -> Kipolishi
pt.fmuser.org -> Kireno
ro.fmuser.org -> Kiromania
ru.fmuser.org -> Kirusi
sr.fmuser.org -> Mserbia
sk.fmuser.org -> Kislovakia
sl.fmuser.org -> Kislovenia
es.fmuser.org -> Kihispania
sw.fmuser.org -> Kiswahili
sv.fmuser.org -> Kiswidi
th.fmuser.org -> Thai
tr.fmuser.org -> Kituruki
uk.fmuser.org -> Kiukreni
ur.fmuser.org -> Kiurdu
vi.fmuser.org -> Kivietinamu
cy.fmuser.org -> Kiwelsh
yi.fmuser.org -> Yiddish
FMUSER Wirless Kusambaza Video Na Sauti Ni Rahisi Zaidi!
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