Ndi impedance khalidwe Kodi

Imodzi mwa magawo ndi aliyense mzere conductive khalidwe impedance. Za kufunika makamaka amapeza mkulu-pafupipafupi wailesi kufala njira, kumene pang'ono mismatch dera ntchito kumabweretsa kuwapotoza kwambiri linanena bungwe. Komano aliyense wogwira kompyuta kugwirizana ndi ena zopezera m'deralo, loyang'anizana tsiku akuti "khalidwe impedance." Tikumbukenso kuti maonekedwe Intaneti Efaneti wa zopotoka awiri kupereka mapeto wosuta alibe nkhawa zolumikizira zapadera, earthing, monga zolumikizira ndi terminators, ngati momwe zinalili ndi mizere coaxial chingwe 10 megabit (kapena zochepa). Komabe, ngakhale ponena za nsapato zopotoka, mawu akuti "khalidwe impedance" ntchito. Nthawi zambiri mu ntchito Intaneti kompyuta makamaka anatsindika ina.

Ndiye kodi khalidwe impedance? Monga tafotokozera kale, ichi ndi chimodzi mwa makhalidwe a mizere conductive pamaziko a ochititsa zachitsulo. Mzera lomaliza kuli kofunika kuti si kusakaniza kuwala deta kufala mizere ano ndi mawaya tingachipeze powerenga mkuwa, zomwe ndi mphamvu onyamula si particles mlandu kuwala - pali malamulo ena. Khalidwe limeneli limasonyeza mtengo kukana jenereta amapereka mzere (magetsi gwero modulated oscillations). Sizikusokonezani kukana, amene angathe kuyeza ndi multimeter ochiritsira, ndi impedance khalidwe la chilengedwe, ngati iwo ali zinthu zosiyana kwathunthu. Yotsirizira sikudalira kutalika kwa wochititsa ndi (izi kale zokwanira mumakumbukira nthawi za "kufanana" kukaniza). Thupi, ndi wofanana ndi muzu lalikulu la chiŵerengero cha inductance (Henry) mphamvu (Farad). Ndemanga towerengeka; ngakhale kuti kuwerengetsera ntchito zigawo zotakasika kwa mzere, yoweyula kulimbikira dera ali nthawizonse mu anapezazo ndi imatengedwa yogwira.

Ndi bwino kuganizira zonse chitsanzo. Tangoganizani dera osavuta wopangidwa mwa mphamvu zoyendetsera (jenereta, R1), ndi ochititsa kukhala impedance khalidwe (R2), ndipo ogula (katundu, R3). Mu nkhani ya kuyanjana kwa resistances onse atatu onse mphamvu opatsirana umalandira ogula ndipo amachita ntchito zothandiza. Ngati pa gawo lirilonse la aone kuti pali izi sakukhutitsidwa, pali ntchito m'pangono pomwe. Pa poti mzere wasweka, pali yoweyula zimaonekera, ndi gawo la mphamvu mu atomu akubwerera - kuti jenereta lapansi. Choncho, m'pofunika kuwonjezera mphamvu yake zoperewerazo ukulu wa mphamvu akusonyeza. M'mawu ena, mbali ya mphamvu yaikulu "kanthu", kutanthauza imfa ndi ntchito sanali mulingo woyenera. Komanso, zina, mismatch ambiri amasokoneza kugwira ntchito kwa mzere lonse.

Tsopano kubwerera kwa maukonde computer, kumene yoweyula kukana amagwira ntchito yofunika kwambiri. Mizere yochokera chingwe coaxial (50 ohm) n'kofunika kulemekeza zikhalidwe: kukana makadi maukonde ndi wochititsa pakati pa iwo anayenera kukhala ofanana. Only mu nkhani iyi, ntchito kuchotsa ndi grounding dongosolo. Ngati mbali iliyonse ya mzere chingwe ndi thanzi ndi Tambasula pang'ono (kukangamira pa katundu wochititsa), ndiye chifukwa kusintha m'mimba mwake wa ochititsa ku malowa kusintha khalidwe impedance, kudzakhala kusonyeza yoweyula, akufufuta dongosolo. Pankhaniyi anayeza yogwira kukana mzere sikungasinthe zayamba (mtengo wotsika zipangizo musati kulembetsa kuwonjezeka kukana). Kuyesa kubwezeretsa ochititsa mzere ndi soldering pa gawo kuonongeka zina kukulitsa nkhaniyo, chifukwa osati kusamutsa kukana, ndi osakaniza mapangidwe osiyana (malata, mkuwa) imene mafunde kufalitsa mosiyana.

Monga otchuka monga awiri zopotoka gulu 5 khalidwe impedance 100 ohms. Zikomo kuchira izi zikhoza kukhala soldered, ndipo ngakhale kupotoza.