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數(shu)字(zi)(zi)網(wang)線(xian)測試儀接入(ru)8V交流電(dian)(dian),測試U1輸(shu)出電(dian)(dian)壓是否(fou)正常,如果正常,按下(xia)電(dian)(dian)源(yuan)開關S1,電(dian)(dian)源(yuan)指示燈LED1亮,第(di)一排(pai)數(shu)碼管(guan)顯(xian)示的(de)數(shu)字(zi)(zi)(顯(xian)示方式(shi)為(wei):1 2 3 4-5 6 7 8)和P3插座(zuo)(左網(wang)線(xian)口(kou))的(de)序(xu)號(hao)對應,雙色二極管(guan)的(de)標(biao)號(hao)(P5~P12)與P2插座(zuo)(右網(wang)線(xian)口(kou))