Feem ntau, lub zog luminous ntawm optical fiber transceiver lossis optical module yog raws li nram no: multimode yog nyob nruab nrab ntawm 10db thiab -18db;ib hom yog 20km ntawm -8db thiab -15db;thiab ib hom yog 60km yog nruab nrab ntawm -5db thiab -12db ntawm.Tab sis yog tias lub zog luminous ntawm fiber ntau optic transceiver tshwm ntawm -30db thiab -45db, ces nws muaj feem ntau tias qhov fiber ntau optic transceiver muaj teeb meem.
Yuav txiav txim seb puas muaj teeb meem nrog lub fiber optic transceiver?
(1) Ua ntej, saib seb qhov taw qhia lub teeb ntawm optical fiber transceiver lossis optical module thiab qhov taw qhia lub teeb ntawm qhov chaw nres nkoj twisted.
ib.Yog tias FX qhov taw qhia ntawm lub transceiver raug kaw, thov paub meej tias qhov txuas ntawm fiber ntau yog sib txuas?Ib qho kawg ntawm cov fiber ntau jumper yog txuas nrog nyob rau hauv parallel;lwm kawg yog kev cob cog rua nyob rau hauv cross hom.
b.Yog hais tias qhov chaw nres nkoj kho qhov muag (FX) qhov taw qhia ntawm A transceiver yog nyob rau thiab qhov chaw nres nkoj kho qhov muag (FX) qhov taw qhia ntawm B transceiver yog tawm, qhov txhaum yog nyob rau sab A transceiver: ib qho ua tau yog: A transceiver (TX) optical kis tau tus mob. chaw nres nkoj tsis zoo vim qhov chaw nres nkoj kho qhov muag (RX) ntawm B transceiver tsis tau txais cov teeb liab kho qhov muag;Lwm qhov muaj peev xwm yog: muaj teeb meem nrog qhov txuas fiber ntau ntawm qhov chaw nres nkoj ntawm qhov chaw xa khoom ntawm A transceiver (TX) (qhov kho qhov muag cable lossis lub qhov muag pom kev tuaj yeem tawg).
c.Qhov taw qhia twisted khub (TP) yog tawm.Thov xyuas kom tseeb tias qhov kev sib tw twisted tsis raug lossis qhov kev sib txuas tsis raug?Thov siv lub ntsuas txuas txuas ntxiv los kuaj (txawm li cas los xij, qhov sib tw twisted lub teeb ntawm qee qhov transceivers yuav tsum tau tos kom txog thaum lub fiber txuas txuas).
d.Qee qhov transceivers muaj ob qhov chaw nres nkoj RJ45: (ToHUB) qhia tias txoj kab txuas mus rau qhov hloov pauv yog txoj kab ncaj nraim;(ToNode) qhia tias txoj kab txuas mus rau qhov hloov pauv yog txoj kab sib tw.
e.Qee cov plaub hau txuas ntxiv muaj MPR hloov ntawm sab: nws txhais tau hais tias txoj kab txuas mus rau qhov hloov yog txoj kab ncaj nraim;DTE hloov: txoj kab txuas mus rau qhov hloov pauv yog hom hla dhau.
(2) Txawm hais tias lub optical cable thiab optical fiber jumper tau tawg lawm
ib.Optical cable kev twb kev txuas thiab disconnection nrhiav kom tau: siv laser teeb, hnub ci, luminous lub cev mus illumination ib kawg ntawm lub optical cable connector los yog coupling;saib puas muaj qhov pom kev ntawm qhov kawg?Yog tias pom lub teeb pom kev, nws qhia tau hais tias lub optical cable tsis tawg.
b.On-off nrhiav kom pom ntawm optical fiber txuas: siv laser teeb, hnub ci, thiab lwm yam kom pom qhov kawg ntawm lub fiber jumper;saib puas muaj qhov pom kev ntawm qhov kawg?Yog tias pom lub teeb pom kev, lub fiber jumper tsis tawg.
(3) Seb puas yog ib nrab / tag nrho duplex hom tsis yog lawm
Qee qhov transceivers muaj FDX keyboards ntawm sab: puv duplex;HDX keyboards: ib nrab duplex.
(4) Ntsuas nrog lub ntsuas hluav taws xob kho qhov muag
Lub zog luminous ntawm optical fiber transceiver lossis optical module nyob rau hauv ib txwm mob: ntau hom: ntawm -10db thiab -18db;ib hom 20 kilometers: ntawm -8db thiab -15db;ib hom 60 kilometers: ntawm -5db thiab -12db;Yog tias lub zog luminous ntawm fiber ntau optic transceiver nyob nruab nrab ntawm -30db-45db, ces nws tuaj yeem txiav txim siab tias muaj teeb meem nrog qhov fiber ntau optic transceiver.