MN 921 是(shi)一款用于測(ce)(ce)量(liang)麥(mai)克(ke)(ke)風的(de)(de)單通道電(dian)(dian)源(yuan)(yuan)(yuan)裝(zhuang)置。在輸(shu)(shu)入(ru) (MIC) 和輸(shu)(shu)出(chu)(chu)(chu) (OUT) 之間(jian)連接(jie)(jie)了一個具(ju)有(you)可(ke)變放(fang)大率的(de)(de)測(ce)(ce)量(liang)放(fang)大器(qi)(qi)(qi)。它(ta)將測(ce)(ce)量(liang)信(xin)(xin)號的(de)(de)動(dong)態范圍調整為以下評估(gu)儀(yi)器(qi)(qi)(qi)的(de)(de)輸(shu)(shu)入(ru)動(dong)態。此外,它(ta)還(huan)是(shi)電(dian)(dian)容負載的(de)(de)驅動(dong)器(qi)(qi)(qi),例如。 G。信(xin)(xin)號輸(shu)(shu)出(chu)(chu)(chu)端(duan)的(de)(de)長 BNC 電(dian)(dian)纜。當用戶使用后面板上(shang)的(de)(de)嵌(qian)入(ru)式開(kai)關(guan)打開(kai) MN 921 時,前面板上(shang)的(de)(de)綠色發(fa)光二(er)極(ji)管將亮起。這表明內部工(gong)作電(dian)(dian)壓(ya)(ya)(ya)(ya)可(ke)用。電(dian)(dian)源(yuan)(yuan)(yuan)可(ke)選(xuan)擇由電(dian)(dian)池、蓄電(dian)(dian)池或主(zhu)電(dian)(dian)源(yuan)(yuan)(yuan)供(gong)電(dian)(dian)。它(ta)為電(dian)(dian)容式測(ce)(ce)量(liang)麥(mai)克(ke)(ke)風提供(gong)所有(you)必要的(de)(de)電(dian)(dian)壓(ya)(ya)(ya)(ya)(前置放(fang)大器(qi)(qi)(qi)、極(ji)化和加熱(re)器(qi)(qi)(qi)電(dian)(dian)壓(ya)(ya)(ya)(ya))。這些(xie)電(dian)(dian)壓(ya)(ya)(ya)(ya)是(shi)間(jian)接(jie)(jie)耦合的(de)(de)(輸(shu)(shu)出(chu)(chu)(chu)信(xin)(xin)號上(shang)沒有(you)電(dian)(dian)源(yuan)(yuan)(yuan)嗡嗡聲(sheng)),并(bing)且(qie)在 LEMO 插座(zuo) (MIC) 上(shang)可(ke)用。放(fang)大器(qi)(qi)(qi)工(gong)作電(dian)(dian)壓(ya)(ya)(ya)(ya) (120 V) 的(de)(de)輸(shu)(shu)出(chu)(chu)(chu)是(shi)防短路(lu)的(de)(de),極(ji)化電(dian)(dian)壓(ya)(ya)(ya)(ya)控制在 ± 0.1 V。對于預極(ji)化測(ce)(ce)量(liang)麥(mai)克(ke)(ke)風,可(ke)以關(guan)閉極(ji)化電(dian)(dian)壓(ya)(ya)(ya)(ya)。 MN 921 可(ke)以提供(gong)帶有(you) IEPE 連接(jie)(jie)(ICP 等(deng))的(de)(de)測(ce)(ce)量(liang)麥(mai)克(ke)(ke)風,與適(shi)配(pei)器(qi)(qi)(qi) A 92 一起使用。A 92 具(ju)有(you) LEMO 插座(zuo)并(bing)適(shi)配(pei) BNC 連接(jie)(jie)器(qi)(qi)(qi)。
膠囊極化電(dian)壓:200 V 可切換
0.4Hz 至 1MHz
12個加固區
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