Yadda ake zazzage lambar wucewa ta matatar mai kunnawa tare da bandwidth na yau da kullun?

Don ƙididdige aikace-aikacen a sassauƙa, Jingxin yana haɓaka masu tacewa don abokin ciniki don cirewa da kansu, kuma yana ba da jagora don daidaita shi daidai azaman misalin mai zuwa na tace VHF.

1. Sake kunna hanya dontaceSaukewa: JX-SF1-152174-215N
An ƙirƙira masu tacewa don kunna sama da kewayon 15 MHz kuma suna da nau'in bandwidth na yau da kullun na 8 MHz.

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2. Kayan aiki da ake buƙata
Mai nazarin hanyar sadarwa wanda zai iya nuna asarar sakawa da asarar dawowa.
A cikin lambar wucewa, asarar shigarwa yakamata ya zama ≤ 1.7dB;asarar dawowa ya kamata ya zama ≥20dB
Kayan Aikin Hannu: 6mm bude-karshen spanner;Screwdriver madaidaiciya

3. Hanyar sake kunnawa
Wannan hanya za ta bayyana tsarin da aka yi amfani da shi don naúrar da aka kunna a baya zuwa mitar cibiyar 160.3MHz, da kewayon bandwidth 8 MHz.
Kamar yadda aka nuna a hoto na 1, an tsara sukulan kunna resonator a matsayin F1, F2, F3, F4, da F5.Wadannan screws na kunnawa suna ƙayyade matsakaicin matsakaicin kowane sandar sanda, yayin da screws ɗin ke motsawa zuwa ciki, mitar za ta kasance ƙasa da ƙasa, yayin da screws ɗin ke motsawa waje, kuma mitar za ta kasance mafi girma.
F12, F23, F34, F45, sukurori ne masu haɗawa, waɗannan screws suna ƙayyade bandwidth na passband, sukurori suna motsawa cikin ciki, kuma suna iya faɗaɗa gefen dama na passband, sukurori suna motsawa waje na iya ƙunsar gefen dama na passband.

Hoto 1

Mataki 1: Haɗa matatar JX-SF1-152174-215N zuwa mai nazarin hanyar sadarwa da aka saita, kamar yadda aka nuna a adadi 2

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Hoto 2

Mataki 2: Saita mitar tsakiya da ake buƙata na 160.3MHz da bandwidth na 8MHz

Mataki 3: Ana iya ganin mitar farko na 160.3MHz ± 4MHz, Mitar kin amincewa daga-band 160.3 ± 9MHz da 160.3 ± 14MHz ana iya gani a cikin kewayon rukunin mitar, kamar yadda aka nuna a adadi 3

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Hoto 3

Matakan da ke biyowa sune tsarin gyara kurakurai na mitar tsakiya daga 160.3MHz zuwa152MHz

1) A mita ke daga high zuwa low, a cikin jerin juya agogon hannu sukurori F1, F2, F3, F4, F5 zuwa 152MHz ± 4MHz, duk kunna sukurori matsawa a ciki, da mita na rami zai matsa gaba daya daga high zuwa low, da passband. matsawa zuwa hagu.

Hoto 4 yana nuna canjin kowane dunƙule kunnawa a mitar 152MHz±4MHz.

Hoto 4

1) Bayan juyawa zuwa kunna dunƙule F5, ci gaba da amfani da spanner 6mm dan sassauta goro; sukudireba yana jujjuya sukurori, daidaita asarar dawowa zuwa ƙayyadaddun ƙimar, Idan asarar shigarwa da asarar dawowa a hagu ba zai iya kaiwa ga ƙayyadadden ƙimar ba, Ana iya rage asarar sakawa da asarar dawowa ta hanyar juyawa agogo baya ko kusa da agogon agogon haɗin gwiwa F12, F23, F34 da F45, kamar yadda aka nuna a hoto na 5.

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Hoto 5

Hoto 6 shine cikakken jadawali na mitar cibiyar a 152MHz;bandwidth na 8 MHz

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Hoto 6

Matakan da ke biyowa sune tsarin gyara kuskure na tsakiya daga160.3 MHzku174 MHz

1) A mita ke daga low zuwa high, a cikin jerin juya agogon hannu sukurori F1, F2, F3, F4, F5 to174MHz ± 4MHz, duk kunna sukurori matsawa waje, da mita na rami zai matsa gaba daya daga low zuwa high, da passband motsa. Zuwa hannun dama.

Hoto 7 yana nuna canjin kowane dunƙule kunnawa a mitar 174MHz±4MHz

20210930143105

Hoto 7

2) Bayan juyawa zuwa kunna dunƙule F5, ci gaba da amfani da spanner 6mm dan sassauta goro; sukudireba yana jujjuya sukurori, daidaita asarar dawowa zuwa ƙayyadaddun ƙimar, Idan asarar shigarwa da asarar dawowa ba zata iya kaiwa ga ƙayyadadden ƙimar ba, asarar shigarwa da Ana iya rage asarar dawowa ta hanyar jujjuya agogon agogo ko kusa da agogon agogon gefe na haɗin haɗin gwiwa F12, F23, F34 da F45, kamar yadda aka nuna a hoto 8.

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Hoto 8

Hoto 9 cikakken hoto ne na mitar cibiyar a 166.7MHz;bandwidth na 8 MHz

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Hoto 9


Lokacin aikawa: Satumba-30-2021