Tapfuura nepakati peiyo theoretical nheyo, ngatienderere mberi nekutsanangura iyo Hardware yetambo terevhizheni network. Ini ndichatanga nyaya kubva kune anonyoresa terevhizheni anogamuchira uye, mune zvakadzama kupfuura mu kutanga chikamu Ini ndichakuudza nezvese zvikamu zve network.

Zviri mukati mechikamu chechinyorwa

• Chikamu 1: General dhizaini yeCATV network
• Chikamu 2: Kuumbwa uye waveform
• Chikamu 3: Analog chikamu chechiratidzo
• Chikamu 4: Digital chikamu chechiratidzo
• Chikamu 5: Coaxial Distribution Network
• Chikamu 6: RF Amplifiers
• Chikamu 7: Optical Receivers
• Chikamu 8: Optical backbone network
• Chikamu 9: Musoro
• Chikamu 10: Troubleshooting pamusoro tambo TV network

Makabati

Iyo TV socket yakabatanidzwa kune divider mukati mefurati, kana (kana pane imwe chete TV) - kune riser munhovo pamatanho. Sezvaunoziva, imwe neimwe yekuwedzera yekubatanidza inogona kusashanda, saka kana uchitsvaga matambudziko, iwe unofanirwa kunyatso teerera kune yega yega.

Mukati mefurati uye kusvika kune nhovo, sekutonga, inozivikanwa kwazvo RG-6 coaxial tambo yakaiswa, iyo inogumiswa nezvisungo zviri nyore izvo zvinowanzosangana chete neakarukwa, uye iyo yepakati musimboti inopinda mukubatanidza kwechigadzirwa. kana adapta "sezvazviri".

Pakuisa migwagwa mikuru, tambo yeRG-11 inoshandiswa, iyo ine kuderera kudiki pamusoro pehurefu uye simba rakakura. Kune zvakare yekuzvitsigira vhezheni yetambo yakadaro ine tambo yakarukwa yesimbi yekuisa "mhepo".

Tambo iyi yakakora uye yakaomarara, saka mamwe majoini akaomarara atove kushandiswa kumisa: aya angave macrimp connectors akafanana nehama diki, kana composite akarukwa zvimiro zviri muindasitiri-level michina.

Hazvisi nyore kuchekerera chinongedzo patambo yakadai uye kazhinji matambudziko anomuka mushure mekuiswa nekuda kwekusatevedzera chiyero chekubvisa kureba (6,3 mm yepakati core + 6,3 mm braid), kana gare gare, nekuda kwekusabatana zvakanaka panguva yekucheka. pasina midziyo yakakosha.

Taps uye splitters

Pakuvaka riser, splitters uye matepi anoshandiswa.

Mukati, iwo ari decoupling yeLC maseketi kuti aenderane neiyo impedance yezvinobuda. Kana iwe ukaparadzanisa coaxial tambo isina mudziyo wakadaro, asi nekungomonyoroka, ipapo kuramba kweimwe neimwe yepombi, iyo inoderera kana yakabatana yakafanana, haibvumire chiratidzo kuti chipfuure zvachose uye chikamu chayo chinozoratidzwa kumashure. trunk, izvo zvinozotungamira mukukanganisa uye ruzha muchiratidzo.

Musiyano wakakosha pakati pematepi uye kupatsanura kuvepo kana kusavapo kwemutsara unobuda (OUT). Kurasikirwa pakubuda uku kushoma uye kunosvika ku1-5 dB, zvichienderana nechiyero. Pamapazi ekunyoresa (TAP) attenuation kubva pa8 kusvika 30 uye zvimwe dB. Izvi zvinodikanwa kuti ive nechokwadi cheiyo nhanho yechiratidzo pamatepi ekunyorera pamatanho akasiyana mumusana.



Kana pakutanga kwekusimuka tine chiratidzo chine chiyero che105dBmkV, saka kuitira kupa munyoreri iyo yakatarwa 75dBmkV kubva kubazi, zvinodikanwa kuisa splitter inonyorovesa 30dB. Uye isingasviki 85dB inogona kusvika kumagumo emugwagwa mukuru, mumamiriro ezvinhu akadaro zvakakosha kuisa splitter, kurasikirwa pamapombi ayo ari mashoma uye 4-pini ndeye 8dB. Chiyero chekuyeresa uye nhamba yepini yevanenge vese vanogadzira yakavharirwa mune yekumaka mudziyo: mumufananidzo uri pamusoro tinoona, semuenzaniso, 620 - 6 munyoreri matepi, damping 20dB imwe neimwe uye imwe huru tepi. Mazita ekuti TAH neSAH haawanzo kugamuchirwa, asi akajairika uye, saizvozvo, zvinoreva matepi (tap) kana splitters (kupatsanurwa).

Kuti uderedze mutsauko wechiratidzo chechiratidzo pakati pezvikamu zvekusimuka, muzvivako zvepamusoro-soro zvakakosha kuputsa muzvikamu zvakawanda uchishandisa trunk couplers. Izvi zvinokutendera kuti udzikise huwandu hweanonyoresa matepi uye ive nechokwadi chekuti nhanho papombi yekunyorera iri padyo sezvinobvira kune yaunoda nhanho.

Mumufananidzo uri kuruboshwe, ndakaratidza muenzaniso wekusimudza yakavakwa kubva kumusoro kusvika pasi uye yakakamurwa kuita zvikamu zvitatu ("pilasters"). Mhando 12 chete dzematepi ekunyorera anoshandiswa pa 5 storey nhovo. Kana pakanga pasina kupatsanurwa, ipapo marudzi gumi nemaviri aifanira kushandiswa mumatanho 12-2dB. Uye kumagumo, isu taigona kunge tisingakwanise kutora kupatsanura zvachose, sezvo kunyange "hafu-waya" ine mabudiro maviri chete inonyorovesa 3 dB, uye nehuwandu hukuru hwezvinobuda, isu tinogona kunge tisisagone. inokwana mubhajeti rekutapudza.

Kana iyo sisitimu ichishandisa kure magetsi magetsi emidziyo (ini ndichanyatso kukuudza nezve izvi muzvikamu zvinotevera), matepi ehunde anotarisa zvakasiyana zvishoma:

Nekuda kwemuviri wakakura uye dhizaini yakanyatsofungwa, iyo yakanakisa yekuzviparadzanisa yeese ari maviri-anotakura zvikamu kubva kune ekunze pesvedzero uye yekunze nharaunda kubva kune yakakura ikozvino inogona kuyerera kuburikidza netambo inopihwa.

Chengetedzo zvinhu

Kuti udzivirire midziyo kubva kune zvinogona kuitika pane tambo, pamwe nevanonyoresa kubva mukusashanda kwemidziyo inoshanda, insulators inoiswa pakutanga kwekusimuka, iyo inopa galvanic kuparadzaniswa pakati pechikamu chikuru uye chikamu chekugovera.

Kuti udzivise kuratidzwa kwechiratidzo kubva kune zvisingaenderane zvinobuda (zvimiro, izvi zvinongori kuburikidza nematepi, asi pane mukana wekuti kana gungano racho risiri remhando yepamusoro kana kuti splitter isina kukwana, vanonyoresa vanozove newave impedance yakasiyana neinodiwa) dzinofanirwa kuvharwa neanoenderana anotora plugs, ayo anowanzo takura basa rimwechete "zvakavanzika" muchiitiko apo zvibvumirano zvega zvega zvekupa masevhisi zvinopedzwa nevagari.

Source: www.habr.com