Ntawm technologyElectronics

Ib sab nraud kav hlau txais xov rau 3G-modem - daim ntawv thov ntawm tus dais ua

Txhua tus neeg uas tau nrhiav 3G-modem, ntxov los yog tom qab ntsib qhov teeb meem ntawm cov neeg pluag teeb liab txais tos. Thaum nws tsis muaj qib muaj peev xwm pab tau lwm kav hlau txais xov ntawm 3G-modem. Nws siv heev tsub kom txog qib ntawm tus tau txais lub teeb liab. Sab nraud kav hlau txais xov ntawm 3G-modem tso cai ob peb lub sij hawm rau kom cov kis ntawm tus thawj cov lus qhia. Nws tau nyob rau hauv ib lub eeb. Nyob rau hauv cov ntaub ntawv no, qhov uas tsis yog-hu adapter. Lawv yuav rov emit lub teeb liab los ntawm lub modem rau lwm kav hlau txais xov thiab vice versa. Hais tias yog, tus general tswvyim yog raws li nram no: xav tau ib tug sab nraud kav hlau txais xov rau 3G-modem thiab Internal kav hlau txais xov RF zoo coaxial cable muaj ib tug me me attenuation coefficient ntawm 2100 MHz. Tag nrho cov no yuav tsum tau muas ntawm ib tug tshwj xeeb khw, tab sis, koj yuav ua tau koj tus kheej ib tug sab nraud ntaus ntawv.

yooj yim tsim

Sab nraud kav hlau txais xov ntawm 3G-modem nrog koj ob txhais tes - nws tsis yog ib qho nyuaj. Ib tug ntawm cov variants ntawm no tsim muaj nyob rau hauv Internet ntau heev. Qhov no kav hlau txais xov Kharchenko ntawm 3G-modem. Nws tseem hu ua "yim" rau tus yam ntxwv zoo. Lub hauv paus rau nws yog Kharchenko waveguide, yim li ob rhombuses, uas tus sau cov ntawv thov tau txais TV raws nyob rau hauv lub UHF ntau yam. Txawm li cas los, nws siv raws li ib tug 3G teeb liab receiver yuav tau ua ib co kev hloov nyob rau hauv lub tsim. Nws yuav pab ntxiv dag zog rau lub teeb liab yog hais tias nws yog. Yog hais tias lub GSM teeb liab yog tsis nyob rau hauv Feem ntau, nws yog qhov zoo tshaj plaws los mus siv ib tug txawv embodiment, tsim nyob rau hauv lub hauv paus ntawm lub satellite kav hlau txais xov. "Yim" ua ntawm tooj liab hlau 4mm², uas yuav yuav nyob rau hauv tej E-khw. Los ntawm cov hlau lub voj bent receiver. Qhov no - ob diamonds nrog sab ntawm 53 hli thiab ob 120 ° ces kaum nyob rau sab vertices rhombuses. "Yim yog tsis cob cog rua rau ntawm qhov chaw raws li lub pullback - ib daim duab, muaj ib tug huab cua kis 5 hli, thiab qhov no yog ib qho tseem ceeb. Circuit Court xaus raug kaw los ntawm soldering. Aluminium ntawv 2 hli tuab phaj yuav tsum txiav 140x140 hli, uas yuav ua raws li ib tug Reflector. Nyob rau hauv qhov chaw ntawm lub phaj qhov drilled rau lub cable nrog ib lub cheeb ntawm 8-10 hom hli. Circuit Court mounted nyob rau hauv 36 hli saum toj no lub Reflector. Nws yog tsis pom qhov twg yuav tsum tau nyob rau hauv kev sib cuag nrog nws. Rau no fixture yog ua los ntawm ib tug dielectric. Lawv yuav ua tau cov yas. Tam sim no koj yuav tsum txiav txim siab yuav ua li cas rau phab ntsa-mount kev xaiv. Koj siv tau cov bracket los ntawm cov satellite phaj. Cov kav hlau txais xov cable yog soldered. Nws yog pom zoo kom siv ib tug coaxial cable 75 Ohm. Txawm li cas los, nws muab tawm empirically hais tias thaum lub txais tos yoj 2100m Hz, uas sib raug rau HSDPA standard, lub hwj chim lub teeb liab yog generated xws li hais tias thaum lub kuj saum toj no 50 ohms instantly decays. Nws yog yog li ntawd npaj siab mus siv ib tug cable nrog ib tug impedance ntawm 50 ohms. Xws li ib tug hlau yuav kiag li ua los ntawm tooj liab, thiab nws yog ib qho yooj yim mus muab soldering. Tus ntaus ntawv yuav tsum tau ntsia thiab anchored nyob rau hauv qhov chaw. Nyob rau lwm kawg ntawm lub cable yog ua matcher. Qhov no yuav tsum tau ib tug tooj liab ci. Qhov no ntawv ci yuav tau ua los ntawm dismantling lub qub transformer, los yog cia li yuav nws los ntawm ib tug retailer. Cov ntawv ci yog ua peculiar cov ntaub ntawv. Ib sab ntawm lub hau mus yuav 45 hli. Case tsis zaum nruj rau hauv lub cev ntawm peb 3G pab kiag li lawm.

Rau braided cables xav tau ib daim ntawm cov ntawv nyiaj qhov luaj li cas 27h76 hli. Lub braid yog soldered mus rau qhov no daim ntawm ntawv ci uas npog lub hau, tab sis tsis pom qhov twg tsis txhawj txog nws, thiab tus tub ntxhais ntawm cov hlau yog soldered mus rau lub cover nws tus kheej. Tab sis nws kuj yuav tsum tsis txhob ncaj qha kov lub cev ntawm lub modem. Nyob rau hauv qhov tseeb, ib tug sab nraud kav hlau txais xov rau 3gG-modem yog npaj txhij rau lub lag luam. Tam sim no tsuas tau configure nws los tsuas tig rau ntawm qhov mount nyob rau hauv kev tshawb fawb ntawm ib tug zoo dua lub teeb liab txais tos.

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