I-VHF repeaters idlala indima ebalulekile ezinhlelweni zokuxhumana zanamuhla ngokwandisa ukufinyelela nokuthuthukisa ikhwalithi yezimpawu zerediyo. Isebenza ngaphakathi kwe-Range ye-Very High Frequency (VHF), ngokuvamile phakathi kuka-30 MHz no-300 MHz, lezi zinsiza zamukela isignali ethambile noma enezinga eliphansi bese ziqhubekisela phambili ngokuqinile, kuvumela ukuxhumana ngezindawo ezinkulu. Le miphumela yokwandisa nokuvuselela isignali ibalulekile ekweqeni izithiyo ezifana nezindawo, izakhiwo, nezinye izinto eziphazamisa ezivamile ukwehlisa ukudluliswa kwe-rediyo. I-VHF repeaters isetshenziswa kakhulu ezindaweni ezahlukene, kuhlanganise nokuphepha komphakathi, ezokuxhumana, nezimboni zokuhweba, inikeza izixazululo zokuxhumana ezithembekile lapho ukuxhumana kwe-rediyo okuqondile kunqamukile noma kungasebenzi.

Ukubaluleka kwe-VHF repeaters kugcizelelwa amandla awo okugcina imiyalezo ecacile, engaphazamiseki, okuyinto ebalulekile ezinsizakalweni zokuphuthuma, ezokundiza, nasezokusebenza kwezokuthutha. Ngokwenza kube lula ukufinyelela okwandisiwe nokucaca kwesignali, ama-VHF repeaters aqinisekisa ukuthi ulwazi olubalulekile lungadluliselwa kahle, ngisho nasezindaweni ezinzima. Le ndatshana ihlola ngokujulile izingxenye, izindlela zokusebenza, izinzuzo, nezicelo zama-VHF repeaters, igcizelela indima yabo ebalulekile emkhakheni wezokuxhumana wanamuhla.

Enye yezizathu eziyisisekelo zokuthi ama-repeater e-VHF abalulekile ukuthi anekhono lokuthuthukisa kakhulu ikhwalithi yesignali kanye nobubanzi bokuxhumana. Izimpawu zomsakazo ebhandeni le-VHF zingavinjwa yizithiyo zemvelo nezokwenziwa, okuholela ekunciphiseni noma ekulahlekeni kwesignali. Ama-repeater alungisa lokhu ngokuth captura izimpawu ezingenayo bese ezithumele kabusha ngamandla aphezulu, ephumelela ekuxhumaneni. Le nqubo ayikhulisi kuphela ububanzi bokusebenza kodwa futhi ithuthukisa nesilinganiso sesignali-nokukhala, inciphisa ukungqubuzana nokuphazamiseka.

Ububanzi obuphakanyisiwe obuhlinzekwa ama-repeater e-VHF buwusizo ikakhulukazi ezindaweni ezinzima, ezindaweni zasemadolobheni, nasezindaweni ezikude lapho ukuxhumana ngqo nge-radio kungathembeki. Isibonelo, ezindaweni eziphakeme noma ezindaweni ezinamadolobha anokuhlala, ama-repeater e-VHF aqinisekisa ukuthi abaphenduli bokuqala kanye nabasebenzi basemkhakheni bahlala bexhumekile ngaphandle kokuphazamiseka. Ngaphezu kwalokho, lawa ma-repeater asekelwa abasebenzisi abaningi ngasikhathi sinye, okwenza kube kuhle kakhulu ukuxhumana okuhlela kahle emikhakheni efana nokwakha, ukuthutha, nokuphathwa kwemicimbi.

Ukuqonda izingxenye ezisemqoka ze-VHF repeaters kunikeza ukuqonda ngomsebenzi wazo nokwethembeka. Izingxenye eziyisisekelo zifaka phakathi umamukeli, umthumeli, kanye nohlelo lwe-antena. Umamukeli uthola amasignali e-VHF angenayo, avamise ukuba namandla aphansi noma aphukile ngenxa yokukhalipha noma izithiyo. Ubuchwepheshe bokuhlunga obuphambili kanye nezindlela zokucubungula amasignali ezifakwe kumamukeli ziyasiza ekuhlukaniseni isignali efunwayo noise yangemuva.

Umthumeli bese uthuthukisa futhi uphinde uthumele isignali esebenzisiwe kwifrekhensi ehlukile ukuze ugweme ukuphazamiseka kwesignali efikayo. Le shintsho lefrekhensi, eyaziwa ngokuthi i-offset, iyisici esibalulekile esiqinisekisa ukutholwa nokuthunyelwa okuqhubekayo, okuphindaphindiwe. Uhlelo lwe-antena, ngokuvamile luqukethe ama-antena aqondile noma ama-antena angama-omnidirectional, ludlala indima ebalulekile kokubili ukuthola nokusakaza isignali ngempumelelo, kuthuthukisa indawo yokumboza kanye namandla esignali.

I-VHF repeaters zisebenza ngohlelo olulula kodwa oluyinkimbinkimbi oluhilela ukuthola, ukucubungula, nokudlulisa kabusha amasignali. Ekuqaleni, umamukeli we-repeater uthola isignali ye-VHF ethunyelwe ngumsebenzisi weradiyo. Le nsizakalo efika ibhujiswa ukuze ikhiphe umsindo futhi ikhuliswa ibe sezingeni elisetshenziswayo. I-repeater icubungula ngaphakathi isignali ukuze ithuthukise ukujula futhi ilungiselele ukudluliswa kabusha.

Ukuze kuvinjelwe i-repeater ekuthumeleni nasekutholeni kumafrekhensi afanayo ngasikhathi sinye, isebenzisa uhlelo lokuhlelwa kwefrekhensi. I-repeater ithumela isignali kumafrekhensi ahlukile, ivumela ukuxhumana okuqhubekayo kokubili ngaphandle kokuphazamiseka. Isignali ethunyelwe kabusha ibamba indawo enkulu kunokuthunyelwa kwangempela, okwandisa kahle ibanga lokuxhumana. Le nqubo iqinisekisa ukuxhumana kwesignali okungaphazamiseki, inikeza abasebenzisi ukuxhumana okuthembekile, ikakhulukazi ezindaweni lapho ukuxhumana okuqondile kungasebenzi.

Ukusebenzisa ama-repeater e-VHF kunikeza izinzuzo eziningi ezenza ukuba abalulekile ezinhlelweni zokuxhumana. Enye yezinzuzo ezinkulu kakhulu yindawo yokumboza ebanzi. Ngokuphinda kuthumele izimpawu ngamandla aphezulu, ama-repeater e-VHF angakwazi ukuhamba kude kakhulu kunezikhala ezitholakala kumaradi athwalwa ngesandla noma kumaradi eselula kuphela. Le ndawo ebanzi ibalulekile ezinkampanini ezisebenza ezindaweni ezibanzi zezwe.

Enye inzuzo ebalulekile ukuthuthukiswa kokuxhumana okwethembekile. Ama-repeater e-VHF athuthukisa ukuhlinzeka kwesignali ngokunciphisa umsindo nokuphazamiseka, okubalulekile ukuze kube nokuxhumana okucacile nokusebenza kahle. Ngaphezu kwalokho, lezi zinhlelo zisekela abasebenzisi abaningi ngesikhathi esisodwa, zenza kube lula imizamo ehlelekile emikhakheni efana nokuphendula kwezimo eziphuthumayo nokuphepha komphakathi. Ama-repeater e-VHF aphinde anikele ekongeni izindleko ngokunciphisa isidingo sezinsiza ezibizayo nokwenza kube nokusetshenziswa kahle kwesikhala se-radio.

I-VHF repeaters isetshenziswa kabanzi ezimbonini ezahlukene ngenxa yokuguquguquka kwazo nokwethembeka. Ezemidlalo, zisebenza njengengxenye ebalulekile yokwandisa ukusakazwa kwenethiwekhi ye-cellular kanye ne-radio, ikakhulukazi ezindaweni zasemaphandleni noma ezinzima. Izinsizakalo zezimpi, kuhlanganise namaphoyisa, iminyango yokushisa, kanye nezimpendulo zezokwelapha, zincike kakhulu kumasistimu e-VHF repeater ukuze zigcine ukuxhumana okungaphazamiseki phakathi kokusebenza okubalulekile.

Ezinye izinhlelo zifaka phakathi ezokundiza nezokuthutha olwandle, lapho ama-VHF repeaters eqinisekisa ukuxhumana okuqhubekayo phakathi kwezindiza, imikhumbi, neziteshi zomhlaba. Izimboni nezimakethe, ezifana nezokumba, ukwakha, nokuhamba, zisebenzisa ama-VHF repeaters ukuhlela imisebenzi ezindaweni ezibanzi noma ezivimbela. Ukuguquguquka nokwakheka okuqinile kwezixazululo ze-VHF repeater kuhambisana nezidingo ezinzima zokuxhumana kulezi zinkalo ezihlukahlukene.

Lapho kuhlolwa izixazululo zokuxhumana, kubalulekile ukuqonda ukuthi ama-repeater e-VHF ahlukaniswa kanjani nezinketho ezifana ne-Ultra High Frequency (UHF) kanye nezinhlelo ze-microwave. Ama-frequency e-VHF ngokuvamile ahlinzeka ngokuqhubeka kahle ezikhathini ezinde nasemathubeni afana nezakhiwo nezihlahla, okwenza kube kufanelekile ezinhlelweni zangaphandle nasemaphandleni. Ama-repeater e-UHF asebenza kuma-frequency aphezulu, ahlinzeka ngokuqhubeka okungcono ezindaweni zasemadolobheni kodwa enobubanzi obufushane uma kuqhathaniswa ne-VHF.

Izinhlelo zokuxhumana ze-microwave, nakuba zisekela izinga eliphezulu ledatha kanye nokudluliswa kokubona, zidinga imigwaqo ecacile kanye nezinsiza ezinzima. Ama-repeater e-VHF athola ibhalansi ngokuhlinzeka ngokuqinisekisa okuhle ngezilungiselelo ezilula nezindleko eziphansi. Imininingwane ngayinye inendawo yayo, kodwa ama-repeater e-VHF ahlala eyi-ukukhetha okuthandwayo lapho ukuhlinzekwa okubanzi, okuqinisekisiwe kubalulekile.

Ngokuhlanganisa, ama-repeater e-VHF ayizinsiza ezibalulekile ekwandiseni ukuxhumana ngokwandisa ibanga, ukuthuthukisa ikhwalithi yesiginali, nokuqinisekisa ukuzinza ezindaweni ezahlukene. Izingxenye zawo ezisemqoka kanye nezindlela zokusebenza ezisebenzayo zenza ukuhanjiswa kwesiginali kube lula, kusekela imisebenzi ebalulekile kwezokuphepha komphakathi, ezokuxhumana, kanye nezimboni. Uma kuqhathaniswa nezixazululo ze-frequency ezihlukile, ama-repeater e-VHF anikeza ukuhlanganiswa okuhehayo kokumboza, ukuhlela, nokusebenza kahle kwezindleko.

泉州市金通光电技术有限公司 (Quanzhou Jintong Optoelectronic Technology Co., Ltd) iyinkampani edume kakhulu ezibophezele ekuthuthukiseni ubuchwepheshe bokuxhumana, kuhlanganise nezixazululo ze-VHF repeater. Ubuchwepheshe bayo nemikhiqizo ethile inegalelo elikhulu ekuthuthukiseni ingqalasizinda yokuxhumana nokwethembeka. Kulabo abanentshisekelo yokuhlola imikhiqizo nezixazululo zokuxhumana ezithuthukile, ukuvakashela ku-Imikhiqizoikhasi linconywa kakhulu. Ukuze ufunde kabanzi ngenkampani kanye nezinto ezintsha zayo, iMayelana Nathiikhasi linikeza ukuqonda okuphelele.