Ib qho ntawm cov khoom uas zoo li tshwm sim rau ntau dua hauv peb kev lag luam yog qhov tshwm sim ntawm qhov tshiabkhoomThaj tsam uas ua rau muaj kev txaws loj loj hauv kev tsim khoom lag luam thiab tom qab ntawd ua ntu zus hauv qhov tsaus ntuj, qhuav kaum xyoo rau xyoo. Cov thev naus laus zis zoo dhau los yog qhov tseeb! Peb tuaj yeem siv nws los hloov kho peb cov khoom. Tom qab ntawd thev naus laus zis nrog rau ob peb xyoos, nrog qee leejTuam txhab uas muagMuab qee cov qauv tshiab. Tab sis nws yeej tsis tau ua nws rau lub sijhawm loj. Tom qab ob peb xyoos, nws thaum kawg dhau los ua ib txoj kev siv tau zoo heev thiab tau siv nyob txhua qhov chaw.
Qhov no tshwm sim ntau vim tias cov khoom tsis tau nyob ntawm qhov kev cia siab tsim los ntawm tus hype. Los yog, tej zaum yuav muaj ntau qhov kev sib tw version uas tsis muaj leej twg paub tseeb txoj kev uas tig mus. Tom qab ntawd thev naus laus zis paub tab thiab ua haujlwm zoo, thiab koj pom nws nyob txhua qhov chaw.
Hauv kuv lub tswv yim, qhov no yog rooj plaub nrog kab hluav taws xobkev sib tham ( Plc). Ob peb xyoos dhau los, plc zoo li yog cov kev daws rau ntau yam kev sib txuas lus. Tab sis tom qab ntawd nws ploj, thiab tam sim no nws zoo li thaum kawg tau coj ib kauj ruam loj rau pem hauv ntej. Nws tau siv nyob rau hauv cov nqi hluav taws xobNtse daim phiajthiab meter nyeem ntawv thov, kev siv tshuab siv tau hauv tsev, thiab lwm qhov chaw uas peb yuav tham txog tom qab. Ntawm chav kawm, nws qhov txiaj ntsig loj tshaj plaws yog tias nws tsis tas yuav cov xaim tshiab. Thiab, PLCS tuaj yeem siv dhau cov kev ncua ntev.
Qhov tseeb, xa cov ntaub ntawv hla cov kab hluav taws xob tau suav tias yog qhov ua tau zoo ntev dhau los. Lub tswvyim ntawm kev xa kev sib txuas luscimTshaj li tib nkawm xov hlau siv rau cov khoom faib hluav taws xob rov qab mus rau xyoo 1924 patent rau "cab hlau xa khoom hluav taws xob nrog hluav taws xob". PLCS rau Lub Suab rau lub suab thaum xyoo 1900 thiab tau los ua neeg coob coob hauv Tebchaws Europe thiab Asmeskas los ntawm xyoo 1920.
Txoj kev sib txuas lus fais fab kev sib txuas lus yog tam sim no categorized raws li broadband thiab kab nqaim. Broadband yog siv los xa cov ntaub ntawv siab ceev thoob lub tsev, xws liEthernet, thaum cov cua sov ua haujlwm ntawm kev kawm vam meej ntxiv thiab yog siv rau kev nyeem ntawv me me,yam muaj hauj lwmtxib thiab tswj, kev siv tshuab hauv tsev, thiab ntau yam teeb meem tswj kev teeb pom kev zoo.
Txhawm rau kom paub meej, plcs ua haujlwm nyob rau hauv cov chaw hnyav. Tsis tsuas yog ua tsis tauhwjchimtxoj hlua ua haujlwm zoo litus kav hlau kav hlau, tab sis muaj ntau lub voj voog hauv ib puag ncig kev lag luam lossis hauv tsev uas tau xa mus rau lub chaw sib txuas lus loj thiab tom qab ntawd nrhiav tau lawv txoj kev mus rau lub hom phiajtus txaisCov. Txhua Circuit Court ntawm lub vaj huam sib luag tseem ceeb muaj ntau cov kais dej, tsim cov impedance heev thiab suab nrov ib puag ncig xa musRfpaib. Lub hwj chim xoos feem ntau yog ib qho nyuaj heev thiab tsis muaj suab sib txuas lus nruab nrab, cov cim los ntawm ntau cov qauv kev cuam tshuam zoo ntawm kev cuam tshuam zoo.
Broadband Plc
Cov tshuab dav dav nyuaj rau kev tiv thaiv thiab muaj kev cuam tshuam ntawm kev tawm tsam ntawm lub cev ntawm lub cev Kev sib txuas hauv tsev yuav yog 200Mbps, qhov tseeb nrawm ntawm cov kev sib txuas ntau yog nyob ib ncig ntawm 30Mbps-uas tseem muaj peev xwm txaus feem ntau ntawm lub sijhawm rau randomdaim duabKev ua si los ntawm router mus rau TV, tsuav nws ntseeg tau thiab zoo li.Homegll kis lub IEEE 1901 cov lus qhia tshwj xeeb, uas ua kom muaj kev cuam tshuam.
NqaimLub caj lajCov Sawv daws
Tab sis hnub no peb xav tham txog kev sib txuas lus me me.
Kev sib txuas lus dhau ntawm cov kab hluav taws xob ntev (AC thiabHigh-voltageDC) yog ib qho tseem ceeb ntawm cov kab sib chaws infrastructure. Kev rho tawm cov khoom siv hluav taws xob nyeem ntawv yog tam sim no cov cai hauv ntau qhov chaw. Kev automation hauv tsev rau teeb pom kev zoo,Hvacthiab cov khoom siv hluav taws xob yog qhov tseem ceeb thiab loj hlob ntawm kev siv. Tag nrho cov cheeb tsam no siv cov kab nqaim plcs. Cov tsim qauv ntawmKev Tswj Xyuas Lub Tshuabyog siv cov thev naus laus zis no. Lwm cov ntawv thov tam sim no muaj xws li kev tswj hwm ntawm txoj kev teeb pom kev, cov tshuab muag khoom thiab lub hnub ci them nyiaj thiab lub tsheb hluav taws xob them.
Kev Sib Txuas Lus TechnologiesRau kev siv cov kab hluav taws xob tau hloov zuj zus. Daim Ntawv Pib Ua Haujlwm suav nrog kev hloov pauv ntawm cov theem pib-cov tsev nqa khoom ua haujlwm hloov cov ntsiab lus (FSK) thiab theem hloov chaw yuam sij (PSK) kev hloov kho. Cov thev naus laus zis tau txwv nyob rau hauv lawv lub peev xwm kom ntseeg tau tiv thaiv Harts powerline ib puag ncig thiab vim li ntawd, Plc cov yees muaj teeb meem.
Tam sim no muaj ob tus qauv tseem ceeb rau cov kab piav: G3 thiab Prime. Feem ntau, G3 (lossis zoo sib xws IEEE Rau cov ntawv thov muaj kev lag luam, koj yuav tsum nco ntsoov tias cov ntaub ntawv yuav tuaj txog, tej zaum tsis nyob rau ntawm qhov nrawm tshaj plaws, tab sis nws ua. G3 muaj 20.36kbps, 34.76kbps, thiab 46kbps (nrog encoding) cov ntaub ntawv kho tau, thiab sib xyaw nrog 6Lowpan / ipv6. G3 muaj nyob hauv European Cenelec-A Orb Bands (G3 ua haujlwm ntawm CCSEC-A or -B Bands) nyob hauv Tebchaws Europe thiab tuaj yeem siv thoob plaws hauv cov qhab nia hauv Europe thiab rau 400kbps hauv Asmeskas. Nws muab txheej {21}}} ntsis} ntsis ecryption rau cov ntaub ntawv kev ruaj ntseg.
OFDM daws cov teeb meem no
G3 thiab Prime siv orthogonal zaus faib cov multiplexing (OFDM), cov txheej txheem rau kev xa cov ntaub ntawv ntau ntawm cov ntawv nrov tshaj plaws. Nws ua ke ntau cov neeg nqa khoom qeeb tsawg los tsim cov ntaub ntawv ntau dua. Ib pawg ntawm cov cab kuj muaj chaw lossis cov raws tau xaiv kom nyob deb ntawm kev cuam tshuam. Ntau qhov kev tawm tsam tau kis tau ib txhij ntawm txawv (orthogonal) ntau zaus. Txhua cov ntaub ntawv cov ntaub ntawv subcarier yog modulated siv psk lossis qeb. Qhov no, ua ke nrog kev txhim kho qhov yuam kev, ua kom cov ntaub ntawv tuaj yeem tau txais yam tsis muaj kev ua yuam kev hauv ib puag ncig tsis muaj ib puag ncig.
Spectrum ntawm ntau qhov chaw ua kom nrov ntawm UDM subcarrers.
Qhov ua kom yuam kev ua ondm lub tswv yim sib txuas yog los txuas cov subcarrier modulation kev ntsuas mus rau cov subcarrers. Los ntawm kev teeb tsa cov subcarrier plast rau lub rececarcal ntawm cov cim nyiaj, lub peaks thiab zeros yog li ntawm cov subcarrier yog li ntawm cov subcarrier thiab muaj kev cuam tshuam nrog orthogonal thiab tsis muaj kev cuam tshuam ntawm lawv.
Nqaim zeb plc maub losDaim icsRau Kev Muaj Txuj Ci
Ib tug xov tooj ntawmtws ntooCov neeg ua haujlwm tsim cov kev pab uas txhawb nqa Prime, G3, thiab IEEE Invection CCS tau haum rau kev siv cov tshuab tswj khoom hauv feem ntauRoj avnrov ib puag ncig. Cov thev naus laus zis siv qee qhov kev ua lej hnyav thiab xav tau qee lub zog loj. Niaj hnub no, qhov no tsis yog qhov teeb meem loj, tab sis nco ntsoov tias tus maub los chip koj xaiv muaj lub zog kho koj tus kheej.
Ib qho piv txwv ntawm nqaim-band plc maub los Ic yogQhov siab's Zeno Max79356, uas siv ob lub raj xa khoom 32- me ntsisNyob twj ywmtxheej txheemCov. Lub nti yog g 3- plcmuaj ntawv tso cai, thiab nws cov kev ua tiav kom nws tuaj yeem daws cov qauv hloov kho thiab hloov teb chaws.
Lub max79356 noj ntau tshaj plaws ntawm tsuas yog 80.6 mw ntawm lub zog hauv mloog hom, thiab IC suav nrog kev ua tiavtus phab ntsapem hauv ntej kawg (Nyob hauv) Nrog AES-CCM encryption lub cav rau kev nyab xeeb siab. Cov cuab yeej muaj nyob rau hauv 48-} pin lqfp pob thiab ua haujlwm dhau ntawm -40 degree rau 85 degrit Kub rau 85 degrit Kub rau 85 degrit Kub rau 85 degrit ntsuas kub.