Yintoni iI-Duplexer?
I-duplexer sisixhobo esivumela unxibelelwano oluya kwicala elinye kwitshaneli enye. Kwiinkqubo zonxibelelwano lwerediyo, iyahlula i-receiver kwi-transmitter ngelixa ivumela ukuba babelane nge-antenna efanayo. Uninzi lweenkqubo ze-radio repeater ziquka i-duplexer.
IiDuplexers kufuneka:
Yenzelwe ukusebenza kwibhendi yefrikhwensi esetyenziswa yisamkeli kunye nomthumeli kwaye kufuneka ikwazi ukuphatha amandla okukhupha komthumeli.
Ukubonelela ngokwala ngokwaneleyo ingxolo yokudlulisela eyenzekayo kwisandi sokwamkela, kwaye kufuneka yenzelwe ukusebenza, okanye ngaphantsi, kokwahlulwa kwamaza phakathi kokudlulisela kunye nokwamkela.
Nika ukwahlukanisa okwaneleyo ukuthintela ukungasebenzi kakuhle kwezixhobo ezisetyenziswa ngomnye umntu.
I-Diplexer vs i-Duplexer. Yintoni umahluko?
I-diplexer sisixhobo esingasebenziyo esidibanisa izinto ezimbini ezifakwayo zibe yimveliso efanayo. Imiqondiso ekufakweni 1 kunye no-2 ithatha iibhendi ezahlukeneyo zefrikhwensi. Ngenxa yoko, iimpawu ekufakweni 1 kunye no-2 zinokuhlala kunye kwimveliso ngaphandle kokuphazamisana. Ikwaziwa ngokuba yi-cross band combiner. I-duplexer sisixhobo esingasebenziyo esivumela unxibelelwano oluhamba kwicala elinye (duplex) lokudlulisa nokwamkela iifrikhwensi ngaphakathi kwebhendi enye kwindlela enye.
Iintlobo zeIiDuplexers
Kukho iintlobo ezimbini ezisisiseko zee-duplexers: i-Band Pass kunye ne-Band Reject.
I-antenna eqhelekileyo ene-duplexer
Inzuzo ecacileyo yokusebenzisa i-duplexer kukuba sinokuthumela kwaye sifumane nge-antenna enye kuphela. Njengoko sinendawo kwiinqaba kwiindawo zesikhululo seenqwelo-moya ezisezantsi ngexabiso eliphantsi, le yinzuzo yokwenyani.
Kwiinkqubo zetshaneli enye, apho kukho umthumeli omnye kunye nommkeli omnye, ukusebenzisa i-duplexer ukuze babelane nge-antenna efanayo lukhetho olulula. Nangona kunjalo, xa kuqwalaselwa iinkqubo zetshaneli ezininzi ezineetshaneli ezininzi zokudlulisa nezokwamkela ezidibeneyo, imeko iba nzima ngakumbi.
Eyona ngxaki iphambili yokusebenzisa ii-duplexers kwiinkqubo ze-multichannel inokubonwa xa sicinga nge-transmitter intermodulation. Oku kukuxubana kwemiqondiso emininzi yokudlulisa kwi-antenna.
Ii-antenna ze-Tx kunye ne-Rx ezahlukeneyo
Ukuba sisebenzisa ii-antenna ezahlukeneyo zokudlulisa nokwamkela, kuthatha indawo engakumbi kwinqaba.
Inzuzo enkulu kukuba, nangona i-intermodulation engasebenziyo isaqhubeka ngendlela efanayo phakathi kwemiqondiso edluliselweyo edibeneyo, akusekho ndlela ethe ngqo yokuba ezi mveliso zifikelele kuyo.
i-receiver. Endaweni yoko, ukwahlulwa phakathi kwee-antenna zokudlulisa kunye nezokwamkelayo kunika ukhuseleko olongezelelweyo. Ukuba ii-transmitters kunye nee-receiver zicwangciswe ngendlela ehambelanayo (oko kukuthi: enye ingaphezulu kwenye, ngokubanzi i-antenna yokwamkela iphezulu phezulu kwinqaba), ngoko ukwahlulwa okungaphezulu kwe-50dB kulula ukukufezekisa.
Ngoko ke, ukuqukumbela, kwiinkqubo zetshaneli enye, qhubeka usebenzise i-duplexer. Kodwa kwiinkqubo zetshaneli ezininzi, ngelixa ii-antenna ezahlukeneyo ziya kukubiza indawo engaphezulu kwinqaba nganye, olu lolona khetho luqinileyo. Lukhusela inkqubo yakho ngcono kuphazamiseko olukhulu oluvela kwi-intermodulation engasebenziyo ngenxa yezo ziphene zincinci kakhulu kwaye kunzima ukuzihlukanisa kwi-assembly okanye ekulungiseni.
I-UHF DuplexerIprojekthi
Injongo apha kukugcina ukufakelwa kwentambo ngaphakathi endlwini.
Xa yakhiwa, indlu yam yafakelwa intambo enye ye-coaxial drop esuka kwi-loft ukuya kwi-lounge, ifihlwe ngononophelo eludongeni lwe-cavity. Le ntambo ithwala iitshaneli zeTV ze-DVB ukusuka kwi-antenna yophahla ukuya kwiTV ekwi-lounge. Ndinayo nebhokisi yeTV yekhebula kwi-lounge endingathanda ukuyisasaza kuyo yonke indlu kwaye i-distribution amp ibekwe kakuhle kwi-loft ukuze kube lula ukufikelela kuzo zonke iigumbi. Ke ngoko, i-Duplexer kuzo zombini iziphelo zentambo ye-drop iya kuyivumela ukuba ithwale i-DVB-TV iye kwi-coax kwaye i-Cable-TV iye phezulu kwi-coax ngaxeshanye, ukuba ndikhetha iFrequency efanelekileyo yokusasazwa kweCable-TV.
IiTV Multiplexes ziqala kwi-739MHz kwaye zandise ukuya kuthi ga kwi-800MHz. Ukusasazwa kweCable-TV kunokucwangciswa ukusuka kwi-471-860 MHz. Ngoko ke ndiza kusebenzisa icandelo eliphantsi lokuthwala iCableTV phezulu kwi-coax kwi-~488MHz kunye necandelo eliphezulu lokuthwala iDVB-TV ezantsi. Icandelo eliphantsi lokuthwala liya kuthwala iDC ukuze inike amandla i-amp yokusasaza kwi-loft kunye neekhowudi zolawulo olukude lweMagic-eye zibuyele kwibhokisi yeCable-TV.
Singakwazi nokwenza ngokwezifiso iCavity Duplexer ngokweemfuno zakho. Ungangena kwiphepha lokwenza ngokwezifiso ukuze unikeze iinkcukacha ozifunayo.
Ixesha lokuthumela: Sep-24-2022
