The main purpose of this test is to verify the resistance to electrostatic discharge (ESD) caused by the proximity or contact of an object or person or device. An object or a person can accumulate an electrostatic charge inside of a voltage higher than 15kv. Okuhlangenwe nakho kukhombisa ukuthi ukwehluleka nokulimala okuningi okungaqondakali kungenzeka kubangelwe yi-ESD. By discharging from the ESD simulator to the surface of and near the EUT, the test instrument (EUT) captures ESD activity. Izinga lobunzima bokukhishwa lichazwa ngokucacile kumazinga womkhiqizo nakuhlelo lokuhlola lwe-EMC olulungiselelwe ngumenzi. EUT checks for functional failures or interference in all of its operational modes. Imigomo yokudlula / yokuhluleka kufanele ichazwe kuhlelo lokuhlola lwe-EMC futhi kunqunywe ngumenzi womkhiqizo.

PCB transient conductivity resistance

Inhloso enkulu yalolu vivinyo ukuqinisekisa ukumelana ne-EUT kokushaqeka kwesikhashana nokwesikhashana ngesikhathi esikhuphukayo esisheshayo esingakhiqizwa yimithwalo ethintekayo noma oxhumana nabo. Isikhathi sokuvuka okusheshayo kanye nemvelo ephindaphindwayo yale pulse yokuhlola kubangela ukuthi la ma-spikes angene kalula kumasekethe e-EUT futhi angahle aphazamise ukusebenza kwe-EUT. Izikhathi ezisebenza ngqo ekunikezelweni kwamandla amakhulu kanye nokuvunyelwa kolayini wesiginali. In other PCB immunity tests, the EUT should be monitored on a pass/fail basis using a general operation configuration.

Resistance of PCB to electromagnetic radiation

Inhloso enkulu yalolu vivinyo ukuqinisekisa amandla we-PCB wokuphazamisa ukuphikisana nemisakazo, ama-transceivers, amafoni we-GSM / AMPS weselula, kanye nezinkundla ezahlukahlukene zikagesi ezakhiwe ngemithombo yezimboni kagesi. Uma uhlelo lungavikelwe, imisebe ye-electromagnetic ingahlanganiswa nekhebula lesibonisi bese ifaka isekethe ngendlela yokuqhuba; Noma ingahlanganiswa ngqo nentambo yesifunda esiphrintiwe. When the amplitude of the rf electromagnetic field is large enough, the induced voltage and demodulated carrier can affect the normal operation of the device.

PCB radiation resistance Test run This test run is usually the longest and most difficult, requiring very expensive equipment and considerable experience. In contrast to other PCB immunity tests, success/failure criteria defined by the manufacturer and a written test plan must be sent to the test room. Lapho usuthisa i-EUT emkhakheni wemisebe, i-EUT kufanele isethwe isebenze ngokujwayelekile kanye nemodi ebucayi kakhulu.

Ukusebenza okujwayelekile kufanele kusungulwe egumbini lokuhlola lapho i-EUT ivezwa ezinkambeni zokuphazanyiswa ezinamabanga amaza azo adlula ibanga lemvamisa elingu-80MHz kuya ku-1GHz. Some PCB anti-interference standards start at 27MHz. Izinga lobunzima leli zinga lidinga amazinga wokumelana ne-PCB ka-1V / m, 3V / m, noma 10V / m. Kodwa-ke, ukucaciswa kwedivayisi kungahle kube nezidingo zazo zamaza “athize (okuphazamisa) amaza” athile. The appropriate PCB radiation resistance level of the product is of interest to the manufacturer.

Izidingo zensimu ezihlanganisiwe I-EN50082-1: 1997 entsha yokuphazanyiswa kwe-PCB ephikisana ne-IEC / EN61000-4-3. I-IEC / EN61000-4-3 idinga indawo yokuhlola ebumbene ngokususelwa kumasampula wokuhlola. The test environment was realized in an anechoic room with tiles arranged with ferrite absorbers to block reflection and resonance in order to establish a unified test site indoors. Lokhu kunqoba amaphutha wokuhlola angazelele futhi ahlala ephindaphindwa abangelwa ukucabanga kanye nama-gradients enkambu kumagumbi wendabuko angahlelwanga. (Igumbi le-semi-anechoic futhi liyindawo ekahle yokukala ukukhishwa kwemisebe endaweni engavamile yangaphakathi edinga ukunemba).

Ukwakhiwa kwamakamelo ama-semi-anechoic absorbers we-RF kuzohlelwa ezindongeni nasesilingweni samakamelo ama-semi-anechoic. Ukuchazwa kwemishini kanye nemidwebo ye-RF kufanele kufake amathayili asindayo we-ferrite aqonde ophahleni lwegumbi. Izitini ze-Ferrite zihlala ezintweni ezenziwe nge-dielectric futhi zinamathiselwe phezulu ekamelweni. Egumbini elingenalutho, ukubonakaliswa okuvela endaweni yensimbi kuzodala umsindo nokuma kwamagagasi, okudala iziqongo nemikhombe ngamandla esikhala sokuhlola. I-gradient yensimu egumbini elingahlelile lingaba ngama-20 kuye kuma-40dB, futhi lokhu kuzodala ukuthi isampula yokuhlola ibonakale yehluleka ngokuzumayo kunkambu ephansi kakhulu. Ukuzwakala kwegumbi kubangela ukuphindeka kokuhlolwa okuphansi kakhulu kanye nezinga eliphakeme “lokuqothula”. (Lokhu kungaholela ekwakhiweni okwedlulele komkhiqizo.) Izinga elisha le-PCB lokulwa nokuphazamiseka i-IEC1000-4-3, elidinga izidingo ezifanayo zensimu, lilungise lokhu kushoda okukhulu.

Izingxenyekazi zekhompuyutha nesoftware edingekayo ukukhiqiza indawo yokuhlola kudinga i-amplifier ye-high-power broadband RF ukushayela i-broadband ehambisa i-antenna ebangeni lokuvama elingaphezu kuka-26MHz kuye ku-2GHz, ebeliqhele ngamamitha amathathu ukusuka kudivayisi ebihlolwa. Fully automated testing and calibration under software control provides greater flexibility for testing and full control of all key parameters such as scan rate, frequency pause time, modulation and field strength. Izingwegwe zesoftware zivumela ukuvumelanisa kokuqapha nokukhuthaza ukusebenza kwe-EUT. Izici ezisebenzisanayo ziyadingeka ekuhlolweni kwangempela ukunika amandla izinguquko zesikhathi sangempela kusoftware yokuhlola ye-EMC nemingcele ye-EUT. Lesi sici sokufinyelela komsebenzisi sivumela yonke idatha ukuthi iqoshwe ngokushesha ukuze ihlolwe kahle futhi yahlukaniswe ukusebenza kwe-EUT EMC.

Izinciphisi zePyramidal Iziphunguli zendabuko zepiramidi (eziyindilinga) ziyasebenza, kepha ubukhulu bepiramidi benza kungabi lula ukuhlola Izikhala ezincane ezisebenzisekayo egumbini. Kumafrikhwensi aphansi angama-80MHz, ubude be-absorber yephiramidi kufanele bube ngu-100cm, futhi ukuze isebenze kumaza aphansi angama-26MHz, ubude be-absorber yephiramidi bube ngaphezu kuka-2m. Ama-absorber pyramid nawo anokubi. Zintekenteke, zonakaliswe kalula ukushayisana, futhi zivutha kalula. Akusebenzi futhi ukusebenzisa lezi zithatha phansi kwegumbi. Ngenxa yokushisa kwe-absorber ye-piramidi, amandla ensimu amakhulu kune-200V / m esikhathini esithile angabeka ingozi enkulu yomlilo.

Isitholi se-Ferrite tile

Amathayili we-Ferrite ayasebenza ngokwendawo, kepha engeza isisindo esikhulu ophahleni, ezindongeni naseminyango yegumbi, ngakho-ke ukwakheka kwekamelo kubaluleke kakhulu. Zisebenza kahle kumaza aphansi, kepha azisebenzi kahle kumaza angaphezu kwe-1GHz. Amathayili we-Ferrite aminyene kakhulu (100mm × 100mm × 6mm ubukhulu) futhi angamelana namandla enkambu angaphezu kwe-1000V / m ngaphandle kwengozi yomlilo.

Ubunzima ekuhlolweni kokumelana nemisebe ye-PCB Ngoba okokusebenza okusizayo okusetshenziselwa ukusebenzisa i-EUT kunikeza amasiginali ezikhuthazo ukuqapha ukusebenza kwayo, kufanele uqobo lwayo kube ukumelana ne-PCB kule nsimu ebucayi, nobunzima bemvelo bokwenza isivivinyo sokuzwela ngemisebe. Lokhu kuvame ukuholela ebunzimeni, ikakhulukazi lapho okokusebenza okusizayo kuyinkimbinkimbi futhi kudinga izintambo eziningi nezindawo zokuxhumana eziya e-EUT eziqhutshwa ngegumbi lokuhlola elivikelwe. Zonke izintambo ezihamba egumbini lokuhlola kufanele zivikelwe kanye / noma zihlungwe ukuze inkambu yokuhlola ivikeleke kuzo ukugwema ukunciphisa ukusebenza kokuvikela kwegumbi lokuhlola. Compromises in the shielding performance of the test room will result in inadvertent leakage of the test site into the surrounding environment, which may cause interference to users of the spectrum. Akuvamile ngaso sonke isikhathi ukusebenzisa izihlungi ze-RF zedatha noma ulayini wesiginali, njengalapho kunedatha eningi noma lapho kusetshenziswa izixhumanisi zedatha enejubane eliphezulu.