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.
a. Yog tias qhov taw qhia FX ntawm lub transceiver raug kaw, thov paub meej tias qhov kev sib 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 xaim hluav taws xob ntawm A transceiver (TX) (qhov optical cable lossis optical jumper yuav tawg).
c. Qhov taw qhia twisted khub (TP) yog tawm. Thov xyuas kom meej tias qhov kev sib tw twisted txuas 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 khub 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 cov kab txuas mus rauhloovyog ib txoj kab ncaj nraim; (ToNode) qhia tias cov kab txuas mus rau qhovhloovyog ib txoj kab crossover.
e. Qee cov plaub hau txuas ntxiv muaj MPRhloovntawm sab: nws txhais tau hais tias txoj kab txuas mus rau lubhloovyog ib txoj kab ncaj nraim; DTEhloov: txoj kab txuas mus rau lubhloovyog hom hla dhau.
(2) Txawm hais tias lub optical cable thiab optical fiber jumper tau tawg lawm
a. 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 seb 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 pom ntawm optical fiber ntau txuas: siv laser teeb, hnub ci, thiab lwm yam kom pom qhov kawg ntawm lub fiber jumper; saib seb puas muaj teeb pom kev ntawm lwm 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 cov transceivers muaj FDXhloovntawm sab: puv duplex; HDXhloov: 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 muaj: 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.