How to debug the passband of a tunable filter with typical bandwidth？

Si loo caddeeyo codsiyada si dabacsanaan leh, Jingxin waxay u samaysaa filtarrada la hagaajin karo ee macmiilka si uu isagu keligii u ciribtiro, waxayna u soo bandhigtaa habraaca si sax ah loogu habeeyo tusaalaha soo socda ee shaandhada VHF.

1. Dib-u-habaynta nidaamkafiltar la hagaajin karoJX-SF1-152174-215N
Shaandheeyayaasha waxaa loogu talagalay inay la jaanqaadaan in ka badan 15 MHz oo kala duwan oo ay leeyihiin xadhkaha baasaska caadiga ah ee 8 MHz.

2. Qalabka loo baahan yahay
Falanqeeye shabakadeed oo muujin kara luminta gelinta iyo khasaaraha soo noqoshada.
Baadhitaanka dhexdiisa, waayida galinta waa in ay ahaataa ≤ 1.7dB; luminta soo noqoshada waa inay noqotaa ≥20dB
Qalabka Gacanta: 6mm spanner-dhamaadka furan; Kaashawiito toosan

3. Habka Dib-u-habaynta
Habkani wuxuu sharxi doonaa habka loo isticmaalo unug hore loogu hagaajiyey inta jeer ee xarunta 160.3MHz, iyo baaxadda baaxadda 8 MHz.
Sida ku cad Jaantuska 1, furayaasha hagaajinta resonator-ka ayaa loo qoondeeyay sida F1, F2, F3, F4, iyo F5. Toogashadani waxa ay go'aamiyaan inta jeer ee udub dhexaadka u yahay tiir kasta, marka ay xidhidhayaashu gudaha u socdaan, soo noqnoqoshada waxa ay noqon doontaa mid hoose, halka muqaalada toosintu ay dibadda u baxayaan, soo noqnoqdana way badnaan doontaa.
F12, F23, F34, F45 waa bilal isku xira, boolaladahani waxay go'aamiyaan xajmiga baasaaska, boolalku waxay u dhaqaaqaan gudaha, waxayna ballaarin karaan dhinaca midig ee baasaska, furayaasha u dhaqaaqaan dibadda waxay cidhiidhi karaan dhinaca midig ee baska.

Sawirka 1

Tallaabada 1: Ku xidh shaandhada JX-SF1-152174-215N shaandhada isku xidhka la habeeyey, sida ku cad shaxanka 2

Jaantuska 2

Tallaabada 2: Deji soo noqnoqoshada dhexe ee loo baahan yahay oo ah 160.3MHz iyo bandwidth of 8MHz

Tallaabada 3: Inta jeer ee bilowga ah ee 160.3MHz ± 4MHz, soo noqnoqoshada diidmada band-ka baxsan 160.3 ± 9MHz iyo 160.3 ± 14MHz waxaa lagu arki karaa inta jeer ee tirada soo noqnoqda, sida ku cad jaantuska 3

Jaantuska 3

♦Tillaabooyinka soo socdaa waa habka wax-ka-hortagga inta jeer ee dhexe ee laga bilaabo 160.3MHz ilaa152MHz

1) Soo noqnoqda waxay ka socotaa sare ilaa hoose, isku xigxiga waxay u wareegaan boolal saacadle ah F1, F2, F3, F4, F5 ilaa 152MHz ± 4MHz, dhammaan boolasha hagaajinta waxay u guuraan gudaha, inta jeer ee godku wuxuu u wareegi doonaa guud ahaan sare ilaa hoose, baasaboorka bidix u dhaqaaqo.

Jaantuska 4 waxa uu tusinayaa isbeddelka fur-fudud kasta oo ah inta jeer ee 152MHz±4MHz.

Jaantuska 4

1) Ka dib markaad u wareegto si aad u hagaajiso furka F5, sii wad isticmaalka 6mm spanner in yar oo dabciya lowska; kaashawiidhku wuxuu rogaa furayaasha hagaajinta, ku hagaaji khasaaraha soo noqoshada qiimaha la cayimay, Haddii galinta galinta iyo soo celinta bidixda aysan gaari karin qiimaha la cayimay, galinta luminta iyo soo celinta soo laabashada waxaa lagu yarayn karaa iyada oo u wareegta saacada ama saacada ka soo horjeeda isku xidhka boolal F12, F23, F34 iyo F45, sida ku cad shaxanka 5.

sawirka 5

Jaantuska 6 waa garaafka dhamaystiran ee inta jeer ee xarunta ee 152MHz; xawaaraha xawaaraha 8 MHz

Jaantuska 6

♦Tillaabooyinka soo socdaa waa habka wax-ka-qabashada ee inta jeer ee udub-dhexaadka ah160.3Mhzku174MHz

1) Inta jeer ee hoos u dhaco ilaa sare, ee isku xigxiga u rogrogmadaan boolal saacad gees ah F1, F2, F3, F4, F5 to174MHz ± 4MHz, oo dhan boolal dawaynta u guuraan dibadda, inta jeer ee dalool bedeli doonaa guud ahaan hoose ilaa sare, baasbaanku dhaqaaqo dhanka midig.

Jaantuska 7 waxa uu tusinayaa isbeddelka furaha hagaynta kasta ee inta jeer ee 174MHz±4MHz

Jaantuska 7

2) Ka dib markaad u wareegto si aad u hagaajisid furaha F5, sii wad isticmaalka 6mm spanner in yar oo dabciya lowska; kaashawiito ayaa rogrogtaa boolal toosan, hagaajiso khasaaraha soo laabashada qiimaha la cayimay, Haddii khasaaraha galinta iyo soo celinta soo celinta aysan gaari karin qiimaha la cayimay, luminta gelinta iyo khasaaraha soo laabashada waxa lagu yarayn karaa iyada oo u wareegta saacada ama saacada ka soo horjeeda isku xidhka boolal F12, F23, F34 iyo F45, sida ku cad shaxanka 8