Ukuze ukwazi ukwanelisa izicelo ngokulula, i-Jingxin iphuhlisa izihluzo ezinokutshibilika ukwenzela umxhasi ukuba azilungise ngokwakhe, kwaye inika isikhokelo sokuyishuna ngokufanelekileyo njengomzekelo olandelayo we-VHF yokucoca.
1. Inkqubo yohlengahlengiso ngokutsha yeicebo lokucoca ulweloJX-SF1-152174-215N
Izihluzi ziyilelwe ukucula ngaphezulu koluhlu lwe-15 MHz kwaye zibe nebhendi yokugqitha eqhelekileyo ye-8 MHz.
2. Izixhobo ezifunekayo
Umhlalutyi womnatha onokubonisa ilahleko yokufaka kunye nokubuyisela ukubuyisela.
Ngaphakathi kwe-passband, ilahleko yokufaka kufuneka ibe ≤ 1.7dB; ilahleko yokubuyisela kufuneka ibe ≥20dB
Izixhobo zesandla: i-6mm isiphelo sesipana esivulekileyo; I-screwdriver ethe ngqo
3. Indlela yokuguqula kwakhona
Le nkqubo iya kuchaza inkqubo esetyenziselwe iyunithi ngaphambili elungelelanisiweyo ukuya rhoqo kwiziko le-160.3MHz, kunye noluhlu lwe-bandwidth 8 MHz.
Njengoko kubonisiwe kuMfanekiso 1, izikrufu ze-resonator tuning zichongwe njenge-F1, F2, F3, F4, kunye ne-F5. Ezi zikrufu zokulungisa zigqiba ukuphindaphinda kumbindi wepali nganye, njengoko izikrufu zokulungisa zisiya ngaphakathi, ukuphindaphindeka kuya kuthanda ukuba sezantsi, ngelixa izikrufu zokucoca zisiya ngaphandle, kwaye ukuphindaphinda kuya kuba phezulu.
I-F12, F23, F34, F45 zizikrufu ezidibanisayo, ezi zikrufu zimisela i-bandwidth ye-passband, izikrufu zingena ngaphakathi, kwaye zinokwandisa icala lasekunene le-passband, izikrufu ezihamba ngaphandle zingacutha icala lasekunene le-passband.
Umfanekiso woku-1
Inyathelo 1: Qhagamshela icebo lokucoca u-JX-SF1-152174-215N kwi-analyzer yenethiwekhi eqwalaselweyo, njengoko kubonisiwe kumfanekiso 2.
Umfanekiso wesi-2
Inyathelo lesi-2: Seta i-frequency esembindini efunekayo ye-160.3MHz kunye ne-bandwidth ye-8MHz
Inyathelo lesi-3: I-frequency yokuqala ye-160.3MHz±4MHz,i-Out-of-band rejection frequency 160.3±9MHz kunye ne-160.3±14MHz inokubonwa kuluhlu lwebhendi, njengoko kubonisiwe kumfanekiso 3.
Umfanekiso wesi-3
♦La manyathelo alandelayo yinkqubo yolungiso lweempazamo zefrikhwensi esembindini ukusuka kwi-160.3MHz ukuya152MHz
1) I-frequency ihamba ukusuka phezulu ukuya ezantsi, ngokulandelelana ukujikelezisa izikhonkwane zewotshi F1, F2, F3, F4, F5 ukuya kwi-152MHz ± 4MHz, zonke izikrufu zokulungisa zihamba zingene ngaphakathi, ukuphindaphindeka komgodi kuya kutshintsha ngokubanzi ukusuka phezulu ukuya ezantsi, ipasband. ishukuma iye ekhohlo.
Umzobo 4 ubonisa utshintsho lwesijija sokulungisa ngasinye kumaxesha angama-152MHz±4MHz.
Umzobo 4
1) Emva kokujikeleza kwi-screw yokulungisa i-F5, qhubeka usebenzisa i-6mm spanner khulula i-nut; i-screwdriver ijikelezisa izikrufu zokulungisa, lungisa ilahleko yokubuyisela kwixabiso elikhankanyiweyo, ukuba ilahleko yokufaka kunye nelahleko yokubuyisela ngasekhohlo ayikwazi ukufikelela kwixabiso elichaziweyo, ilahleko yokufaka kunye nelahleko yembuyekezo inokuncitshiswa ngokujikeleza ngasekunene okanye ngasekunene kwizikrufu ezidibanisayo F12, F23, F34 kunye neF45, njengoko kubonisiwe kumfanekiso 5.
Umfanekiso wesi-5
Umzobo 6 yigrafu epheleleyo yefrikhwensi yeziko kwi-152MHz; bandwidth kwi-8MHz
Umfanekiso wesi-6
♦La manyathelo alandelayo yinkqubo yolungiso lweempazamo zasembindini rhoqo ukusuka160.3MHzukuya174MHz
1) I-frequency ihamba ukusuka ezantsi ukuya phezulu, ngokulandelelana ukujikelezisa izikhonkwane zewotshi F1, F2, F3, F4, F5 ukuya ku-174MHz ± 4MHz, zonke izikrufu zokulungisa zihambela ngaphandle, ukuphindaphindeka komgodi kuya kutshintsha jikelele ukusuka ezantsi ukuya phezulu, i-passband iyahamba. Iya ngasekunene.
Umzobo 7 ubonisa utshintsho lwesikrufu sokulungisa ngasinye kumaxesha angama-174MHz±4MHz
Umzobo 7
2) Emva kokujikeleza kwi-screw F5, qhubeka usebenzisa i-6mm spanner khulula kancinane i-nati; i-screwdriver ijikelezisa izikrufu zokulungisa, lungisa ilahleko yokubuyisela kwixabiso elikhankanyiweyo, ukuba ilahleko yokufaka kunye nelahleko yokubuyisela ayinakufikelela kwixabiso elichaziweyo, ilahleko yokufaka kunye ilahleko yembuyekezo inokuncitshiswa ngokujikeleza ngasekunene okanye ngasekunene nangasekhohlo izikrufu ezidibanisayo F12, F23, F34 kunye neF45, njengoko kubonisiwe kumfanekiso 8.
Umzobo 8
Umzobo we-9 yigrafu epheleleyo yefrikhwensi yeziko kwi-166.7MHz; bandwidth kwi-8MHz
Umzobo 9
Ixesha lokuposa: Sep-30-2021
