Xov xwm

Thaum lub peev xwm kis tau tus mob ntawm lub cev channel siab dua qhov kev thov rau ib lub teeb liab, cov channel tuaj yeem sib koom los ntawm ntau lub teeb liab, piv txwv li, cov kab hauv lub cev ntawm lub xov tooj feem ntau muaj ntau txhiab lub teeb liab kis tau los ntawm ib qho fiber ntau. Multiplexing yog ib qho cuab yeej siv los daws qhov t...

(1) AMI code AMI (Alternative Mark Inversion) code yog lub npe tag nrho ntawm cov cim hloov pauv hloov pauv, nws txoj cai encoding yog hloov pauv cov lus code "1" (kos) rau "+1" thiab "-1", thaum qhov "0" (dawb kos npe) tseem tsis hloov. Piv txwv li...

Thaum peb xa cov teeb liab, txawm tias nws yog lub teeb liab kho qhov muag lossis lub teeb liab hluav taws xob lossis lub teeb liab wireless, yog tias nws tau xa ncaj qha, lub teeb liab raug cuam tshuam rau lub suab nrov, thiab nws nyuaj rau kom tau txais cov ntaub ntawv raug ntawm qhov kawg tau txais. In order t...

Txoj hauv kev yooj yim ntawm binary digital modulation yog: binary amplitude keying (2ASK) - amplitude hloov ntawm lub teeb liab cov cab kuj; Binary zaus hloov pauv keying (2FSK) - qhov hloov pauv zaus ntawm cov teeb liab thauj khoom; Binary theem hloov keying (2PSK)- Theem hloov ntawm cov cab kuj si...

WiFi yog lub thoob ntiaj teb Wireless hauv cheeb tsam network (WLAN) tus qauv, lub npe tag nrho Wireless Fidelity, tseem hu ua IEEE802.11b tus qauv. WiFi yog Ameslikas raws li IEEE802.11 raws tu qauv, luam tawm nyob rau hauv 1997, txhais WLAN MAC txheej thiab lub cev txheej txheem. Ua raws li ...

Optical eye image debugging Target: Extinction ratio Kev tshawb fawb thiab kev loj hlob theem: nruab nrab ntawm 10-15 (loj yog zoo dua me me), raws li qhov tseeb qhov teeb meem yuav tsim nyog los txhim kho qhov extinction ratio, tab sis tsis tsawg heev. Nws muaj feem xyuam rau rhiab heev. Quiver...