G1 Universal LNB
Mafotokozedwe Akatundu
G1 mndandanda wapadziko lonse wa LNB uli ndi kutulutsa kumodzi kapena mapasa kapena Quattro, doko lililonse la RF limakhala ndi zotulutsa za 950 ~ 2150MHz zokhala ndi 13V kapena 18V reverse DC mphamvu kuchokera ku cholandila satana.
Low-noise block downconverter (LNB) ndi chipangizo cholandirira chomwe chimayikidwa pa mbale za satana, chomwe chimasonkhanitsa mafunde a wailesi kuchokera m'mbale ndikuwatembenuza kukhala chizindikiro chomwe chimatumizidwa kudzera pa chingwe kupita ku wolandira mkati mwa nyumbayo. LNB imatchedwanso low-noise block, low-noise converter (LNC), kapena ngakhale low-noise downconverter (LND).
LNB ndi kuphatikiza kwa amplifier otsika phokoso, chosakanizira pafupipafupi, oscillator wamba ndi amplifier yapakatikati (IF). Imagwira ngati kutsogolo kwa RF kutsogolo kwa wolandila satana, kulandira chizindikiro cha microwave kuchokera ku satelayiti yotengedwa ndi mbale, ndikuikulitsa, ndikuchepetsa kutsika kwa ma frequency mpaka kutsika kwapakati (IF). Kutsika uku kumapangitsa kuti chizindikirocho chinyamulidwe ku cholandila TV chamkati chamkati pogwiritsa ntchito chingwe chotsika mtengo cha coaxial; ngati chizindikirocho chikhalabe pa ma frequency ake a microwave chikadafunika mzere wokwera mtengo komanso wosatheka.
LNB nthawi zambiri imakhala kabokosi kakang'ono koyimitsidwa pa boom imodzi kapena zingapo zazifupi, kapena mikono yodyetsa, kutsogolo kwa chowonetsera mbale, pakuyang'ana kwake (ngakhale mbale zina zimakhala ndi LNB kumbuyo kapena kumbuyo kwa chowunikira). Chizindikiro cha microwave kuchokera m'mbale chimatengedwa ndi feedhorn pa LNB ndipo chimaperekedwa ku gawo la waveguide. Pini imodzi kapena zingapo zachitsulo, kapena ma probes, zimatuluka mumayendedwe olowera kumanja kwa axis ndikuchita ngati tinyanga, kudyetsa siginecha ku bolodi losindikizidwa mkati mwa bokosi lotetezedwa la LNB kuti lisinthidwe. Chizindikiro chochepa cha IF chimachokera ku socket pabokosi lomwe chingwe cha coaxial chimagwirizanitsa.
