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

Iji kwado ngwa ndị ahụ n'ụzọ dị nro, Jingxin na-emepụta ihe nzacha ndị a na-emegharị anya maka onye ahịa ka ọ mebie ya n'onwe ya, ma na-enye ntụziaka ka ọ gbanwee ya nke ọma dị ka ihe atụ na-esonụ nke VHF filter.

1. Ndozigharị usoro makanzacha tunableJX-SF1-152174-215N
Emebere ihe nzacha ndị ahụ ka ha na-emegharị ihe karịrị 15 MHz ma nwee bandwit passband nke 8 MHz.

2. Akụrụngwa achọrọ
Ihe nyocha netwọkụ nwere ike igosipụta mfu ntinye na nloghachi.
N'ime akwụkwọ ikike ngafe, mfu ntinye kwesịrị ịbụ ≤ 1.7dB; nkwụghachi azụ kwesịrị ịbụ ≥20dB
Ngwaọrụ aka: 6mm spanner na-emeghe; screwdriver kwụ ọtọ

3. Re-Tuning Method
Usoro a ga-akọwa usoro a na-eji maka nkeji nke etinyeburu na etiti etiti nke 160.3MHz, yana bandwidth 8 MHz.
Dịka e gosiri na eserese 1, a na-ahọpụta skru resonator dịka F1, F2, F3, F4, na F5. Ihe nkedo nlegharị anya ndị a na-ekpebi oge etiti nke ogwe osisi ọ bụla, ka ihe nkedo na-emegharị na-abanye n'ime, ugboro ole ga-adị ala, ebe screws na-emegharị na-apụ apụ, ugboro ga-adị elu.
F12, F23, F34, F45 bụ skru na-ejikọta ọnụ, skru ndị a na-ekpebi bandwit nke passband, skru na-abanye n'ime, ma nwee ike gbasaa akụkụ aka nri nke passband, skru na-apụ apụ nwere ike warara akụkụ aka nri nke passband.

Onyonyo 1

Kwụpụ 1: Jikọọ nzacha JX-SF1-152174-215N na onye nyocha netwọk ahazi, dị ka egosiri na foto 2.

Onyonyo 2

Nzọụkwụ 2: Tọọ ugboro etiti achọrọ nke 160.3MHz na bandwit nke 8MHz

Nzọụkwụ 3: Enwere ike ịhụ ugboro mbụ nke 160.3MHz ± 4MHz, ugboro ugboro jụrụ ajụ 160.3 ± 9MHz na 160.3 ± 14MHz na ọnụọgụ ọnụọgụ ugboro, dị ka egosiri na ọnụ ọgụgụ 3.

Onyonyo 3

♦Usoro ndị a bụ usoro nbipu nke etiti etiti site na 160.3MHz ruo152MHz

1) The ugboro na-aga site elu gaa na ala, na usoro bugharia clockwise kposara F1, F2, F3, F4, F5 ka 152MHz ± 4MHz, niile n'iji ya gee ntị kposara akpali n'ime, ugboro nke oghere ga-gbanwee n'ozuzu si elu ruo ala, na passband. na-aga n'aka ekpe.

Ọgụgụ 4 na-egosi mgbanwe nke skru ntugharị ọ bụla na ugboro 152MHz±4MHz.

Onyonyo 4

1) Mgbe n'ịtụgharị na n'iji ya gee ntị F5, gaa n'ihu na-eji 6mm spanner dị ntakịrị tọpụ aku ahụ; screwdriver na-atụgharị skru ahụ, gbanwee nloghachi ahụ na uru a kapịrị ọnụ, ma ọ bụrụ na ntinye ntinye na nloghachi n'aka ekpe enweghị ike iru uru akọwapụtara, na Enwere ike ibelata mfu ntinye na nkwụghachi azụ site n'ịtụgharị n'akụkụ elekere ma ọ bụ n'aka elekere anya, skru njikọ njikọ F12, F23, F34 na F45, dị ka egosiri na foto 5.

Onyonyo 5

Ọgụgụ 6 bụ eserese zuru oke nke ugboro etiti na 152MHz; bandwit na 8MHz

Onyonyo 6

♦Ndị na-esonụ nzọụkwụ bụ debugging usoro nke Central ugboro si160.3MHzka174MHz

1) The ugboro na-aga site na ala ruo elu, na usoro bugharia clockwise kposara F1, F2, F3, F4, F5 to174MHz ± 4MHz, niile n'iji ya gee ntị kposara aga apụ, ugboro nke oghere ga-gbanwee n'ozuzu si ala ruo elu, passband na-akpali. N'aka nri.

Ọgụgụ 7 na-egosi mgbanwe nke skru ntugharị ọ bụla na ugboro nke 174MHz±4MHz

Onyonyo 7

2) Mgbe n'ịtụgharị na n'iji ya gee ntị ịghasa F5, na-aga n'ihu na-eji 6mm spanner dịtụ atọghe nut; screwdriver na-atụgharị na n'iji ya gee ntị skru, mezie nloghachi ọnwụ na kpọmkwem uru, Ọ bụrụ na ntinye ọnwụ na nloghachi ọnwụ enweghị ike iru kpọmkwem uru, ntinye mfu na Enwere ike ibelata mfu nloghachi site n'ịtụgharị n'akụkụ elekere ma ọ bụ na-aga n'ihu elekere, skru njikọ njikọ F12, F23, F34 na F45, dị ka egosiri na foto 8.