屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)是(shi)為了保證在(zai)(zai)有電(dian)(dian)(dian)磁干(gan)擾(rao)環(huan)境下系(xi)(xi)(xi)統的(de)(de)(de)傳輸(shu)(shu)(shu)性(xing)能(neng)(neng)，這(zhe)(zhe)里(li)的(de)(de)(de)抗干(gan)擾(rao)性(xing)應(ying)包(bao)括兩(liang)個(ge)方面(mian)，即抵御外(wai)(wai)來電(dian)(dian)(dian)磁干(gan)擾(rao)的(de)(de)(de)能(neng)(neng)力以及(ji)系(xi)(xi)(xi)統本(ben)身向外(wai)(wai)輻射(she)電(dian)(dian)(dian)磁干(gan)擾(rao)的(de)(de)(de)能(neng)(neng)力。理論上(shang)講，在(zai)(zai)線(xian)纜和(he)連接(jie)件外(wai)(wai)表包(bao)上(shang)一(yi)(yi)層(ceng)(ceng)(ceng)(ceng)(ceng)金屬(shu)材料屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)層(ceng)(ceng)(ceng)(ceng)(ceng)，可以有效(xiao)地(di)(di)濾除不(bu)(bu)(bu)必(bi)要(yao)(yao)的(de)(de)(de)電(dian)(dian)(dian)磁波（這(zhe)(zhe)也(ye)是(shi)目(mu)(mu)前(qian)絕大(da)多數屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)系(xi)(xi)(xi)統采用的(de)(de)(de)方法(fa)），然(ran)而(er)，這(zhe)(zhe)種(zhong)方法(fa)的(de)(de)(de)有效(xiao)程度(du)到(dao)(dao)底(di)如(ru)何(he)呢？對(dui)于屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)系(xi)(xi)(xi)統而(er)言(yan)，單單有了一(yi)(yi)層(ceng)(ceng)(ceng)(ceng)(ceng)金屬(shu)屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)層(ceng)(ceng)(ceng)(ceng)(ceng)是(shi)不(bu)(bu)(bu)夠的(de)(de)(de)，更(geng)(geng)重(zhong)要(yao)(yao)的(de)(de)(de)是(shi)必(bi)須(xu)將屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)層(ceng)(ceng)(ceng)(ceng)(ceng)完(wan)全(quan)良好地(di)(di)接(jie)地(di)(di)，這(zhe)(zhe)樣才能(neng)(neng)把干(gan)擾(rao)電(dian)(dian)(dian)流有效(xiao)地(di)(di)導入大(da)地(di)(di)。但是(shi)，實(shi)際施工時(shi)，屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)系(xi)(xi)(xi)統存在(zai)(zai)一(yi)(yi)些不(bu)(bu)(bu)可忽視的(de)(de)(de)困(kun)難：由(you)(you)于屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)系(xi)(xi)(xi)統對(dui)接(jie)地(di)(di)的(de)(de)(de)苛刻要(yao)(yao)求(qiu)，極(ji)容(rong)易(yi)造成(cheng)(cheng)接(jie)地(di)(di)不(bu)(bu)(bu)良，比如(ru)接(jie)地(di)(di)電(dian)(dian)(dian)阻(zu)過大(da)、接(jie)地(di)(di)電(dian)(dian)(dian)位(wei)不(bu)(bu)(bu)均衡等，這(zhe)(zhe)樣在(zai)(zai)傳輸(shu)(shu)(shu)系(xi)(xi)(xi)統的(de)(de)(de)某兩(liang)點(dian)間(jian)便(bian)會(hui)產生電(dian)(dian)(dian)位(wei)差(cha)，進而(er)產生金屬(shu)屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)層(ceng)(ceng)(ceng)(ceng)(ceng)上(shang)的(de)(de)(de)電(dian)(dian)(dian)流，造成(cheng)(cheng)屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)層(ceng)(ceng)(ceng)(ceng)(ceng)不(bu)(bu)(bu)連續(xu)，破壞其完(wan)整性(xing)。這(zhe)(zhe)時(shi)，屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)層(ceng)(ceng)(ceng)(ceng)(ceng)本(ben)身已經成(cheng)(cheng)為一(yi)(yi)個(ge)最大(da)的(de)(de)(de)干(gan)擾(rao)源，因而(er)導致其性(xing)能(neng)(neng)反而(er)遠不(bu)(bu)(bu)如(ru)非(fei)屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)系(xi)(xi)(xi)統。屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)線(xian)在(zai)(zai)高(gao)頻傳輸(shu)(shu)(shu)時(shi)，需要(yao)(yao)兩(liang)端接(jie)地(di)(di)，這(zhe)(zhe)樣更(geng)(geng)有可能(neng)(neng)在(zai)(zai)屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)層(ceng)(ceng)(ceng)(ceng)(ceng)上(shang)產生電(dian)(dian)(dian)位(wei)差(cha)。由(you)(you)此可見，屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)系(xi)(xi)(xi)統本(ben)身的(de)(de)(de)要(yao)(yao)求(qiu)，恰(qia)恰(qia)構成(cheng)(cheng)保證其性(xing)能(neng)(neng)的(de)(de)(de)最大(da)障礙.一(yi)(yi)個(ge)完(wan)整的(de)(de)(de)屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)系(xi)(xi)(xi)統要(yao)(yao)求(qiu)處處屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)，一(yi)(yi)旦(dan)有任(ren)何(he)一(yi)(yi)點(dian)的(de)(de)(de)屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)不(bu)(bu)(bu)能(neng)(neng)滿足要(yao)(yao)求(qiu)，都勢(shi)必(bi)會(hui)影(ying)響到(dao)(dao)系(xi)(xi)(xi)統的(de)(de)(de)整體傳輸(shu)(shu)(shu)性(xing)能(neng)(neng)。可是(shi)，目(mu)(mu)前(qian)市場(chang)上(shang)還很(hen)少有網絡集線(xian)器或計算機本(ben)身擁有屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)支持，所以很(hen)難實(shi)現整個(ge)傳輸(shu)(shu)(shu)鏈路的(de)(de)(de)屏(ping)(ping)(ping)(ping)(ping)蔽(bi)(bi)(bi)。

遼(liao)寧(ning)大元電纜(lan)制造(zao)有(you)(you)限公(gong)司(si)位于(yu)鐵嶺鐵西工(gong)業(ye)園區(qu)，成立于(yu)1989年(nian)6月18日(ri)，原廠名(ming)為“鐵嶺大元電纜(lan)有(you)(you)限公(gong)司(si)”。為了適應市場需求，同時公(gong)司(si)規模的(de)不斷擴(kuo)大和發展，于(yu)2012年(nian)6月更名(ming)為“遼(liao)寧(ning)大元電纜(lan)制造(zao)有(you)(you)限公(gong)司(si)”，占地面(mian)積18000平方米，是電線(xian)電纜(lan)產品(pin)的(de)專業(ye)生產制造(zao)商。