由于在戶(hu)(hu)外、室內等區域，無線(xian)對講(jiang)系(xi)(xi)統的(de)(de)信(xin)號(hao)(hao)強度較(jiao)弱，而且(qie)采(cai)用(yong)(yong)頻率調制(zhi)技(ji)術（如 MHZ、 NMR、 BSI等）產生的(de)(de)信(xin)號(hao)(hao)傳(chuan)輸(shu)時(shi)(shi)延大(da)，傳(chuan)輸(shu)距離遠(yuan)。因(yin)此有(you)(you)線(xian)對講(jiang)系(xi)(xi)統不適合在戶(hu)(hu)外環境使(shi)(shi)(shi)用(yong)(yong)，特別是在冬天及低風速(su)季節(jie)(jie)使(shi)(shi)(shi)用(yong)(yong)。雖然無線(xian)對講(jiang)系(xi)(xi)統也(ye)有(you)(you)著不錯的(de)(de)效果。但由于系(xi)(xi)統工(gong)作時(shi)(shi)會(hui)有(you)(you)一定的(de)(de)干擾(rao)，使(shi)(shi)(shi)對講(jiang)效果下(xia)降，另外在信(xin)號(hao)(hao)較(jiao)弱時(shi)(shi)對用(yong)(yong)戶(hu)(hu)語(yu)音(yin)產生了影(ying)響。特別是在人員復雜、通(tong)信(xin)距離較(jiao)短或需要(yao)較(jiao)長(chang)時(shi)(shi)間使(shi)(shi)(shi)用(yong)(yong)時(shi)(shi)。因(yin)此，更需要(yao)有(you)(you)一個(ge)可靠的(de)(de)無線(xian)對講(jiang)系(xi)(xi)統提供與有(you)(you)線(xian)對講(jiang)系(xi)(xi)統一樣(yang)的(de)(de)語(yu)音(yin)信(xin)息(xi)與控制(zhi)。無線(xian)對講(jiang)系(xi)(xi)統具(ju)有(you)(you)很高的(de)(de)靈(ling)活性(xing)，它能夠滿足現場中所有(you)(you)環境使(shi)(shi)(shi)用(yong)(yong)需求并能隨(sui)(sui)時(shi)(shi)切換（如在野外、戶(hu)(hu)外電(dian)話等),用(yong)(yong)戶(hu)(hu)可以在任何(he)地(di)點(dian)使(shi)(shi)(shi)用(yong)(yong)、隨(sui)(sui)時(shi)(shi)、隨(sui)(sui)地(di)進行通(tong)訊。使(shi)(shi)(shi)用(yong)(yong)方便、節(jie)(jie)省成本、節(jie)(jie)約費(fei)用(yong)(yong)。下(xia)面我們來(lai)了解一下(xia)無線(xian)對講(jiang)系(xi)(xi)統它主要(yao)是什(shen)么(me)優(you)點(dian)？

1.性能(neng)穩定(ding)，可靠性高(gao)

在相(xiang)同無(wu)線(xian)(xian)(xian)傳輸(shu)距離下(xia)，無(wu)線(xian)(xian)(xian)傳輸(shu)信(xin)號(hao)(hao)更穩(wen)定(ding)由于使用了功率(lv)放大(da)(da)器(qi)來對(dui)無(wu)線(xian)(xian)(xian)信(xin)號(hao)(hao)進(jin)行壓縮和(he)放大(da)(da)，使無(wu)線(xian)(xian)(xian)信(xin)號(hao)(hao)更加(jia)穩(wen)定(ding)可靠。無(wu)線(xian)(xian)(xian)信(xin)號(hao)(hao)在弱電磁(ci)環(huan)(huan)境下(xia)也能(neng)(neng)保(bao)持(chi)較好(hao)的(de)(de)(de)性(xing)能(neng)(neng)。無(wu)線(xian)(xian)(xian)對(dui)講(jiang)(jiang)系(xi)統(tong)具有(you)發(fa)射(she)功率(lv)小、抗千(qian)擾(rao)(rao)能(neng)(neng)力(li)強(qiang)(與有(you)線(xian)(xian)(xian)對(dui)講(jiang)(jiang)系(xi)統(tong)比(bi)較)和(he)抗電磁(ci)干擾(rao)(rao)能(neng)(neng)力(li)強(qiang)(與有(you)線(xian)(xian)(xian)對(dui)講(jiang)(jiang)系(xi)統(tong)比(bi)較)的(de)(de)(de)特點。無(wu)線(xian)(xian)(xian)對(dui)講(jiang)(jiang)系(xi)統(tong)發(fa)射(she)信(xin)號(hao)(hao)在發(fa)射(she)前和(he)發(fa)射(she)后均(jun)能(neng)(neng)保(bao)持(chi)良(liang)好(hao)的(de)(de)(de)性(xing)能(neng)(neng)，使用過(guo)程中(zhong)，發(fa)射(she)信(xin)號(hao)(hao)與接收信(xin)號(hao)(hao)完全不受任何千(qian)擾(rao)(rao)，可保(bao)持(chi)很好(hao)的(de)(de)(de)穩(wen)定(ding)性(xing)，具有(you)良(liang)好(hao)的(de)(de)(de)抗千(qian)擾(rao)(rao)性(xing)和(he)抗低頻干擾(rao)(rao)能(neng)(neng)力(li)，即使在惡(e)劣的(de)(de)(de)環(huan)(huan)境下(xia)也能(neng)(neng)保(bao)持(chi)較好(hao)的(de)(de)(de)性(xing)能(neng)(neng)。因此無(wu)線(xian)(xian)(xian)系(xi)統(tong)有(you)較高(gao)的(de)(de)(de)可靠性(xing)。

2.功(gong)耗小(xiao)、不受天氣(qi)、濕度(du)的影響

無(wu)線對講(jiang)系統(tong)在不同(tong)的(de)環境(jing)中，無(wu)線通(tong)信(xin)設(she)(she)備和(he)有線通(tong)信(xin)設(she)(she)備一樣都要進(jin)行電(dian)能的(de)消耗(hao)。當環境(jing)溫度(du)在-40°C以下(xia)時，無(wu)線通(tong)信(xin)設(she)(she)備需要每(mei)天工(gong)(gong)作8小(xiao)(xiao)時左(zuo)右;當環境(jing)溫度(du)為(wei)-20°C時，每(mei)天工(gong)(gong)作8小(xiao)(xiao)時左(zuo)右;當環境(jing)溫度(du)為(wei)-30°C時，每(mei)天工(gong)(gong)作4小(xiao)(xiao)時左(zuo)右。目(mu)前市場上常見的(de)無(wu)線對講(jiang)系統(tong)有兩(liang)種(zhong)電(dian)源(yuan)輸入方(fang)(fang)式(shi)(shi)，一種(zhong)是(shi)電(dian)源(yuan)輸入，另(ling)一種(zhong)是(shi)電(dian)源(yuan)輸出。從這兩(liang)種(zhong)方(fang)(fang)式(shi)(shi)對系統(tong)的(de)功(gong)(gong)耗(hao)來看，電(dian)源(yuan)輸入方(fang)(fang)式(shi)(shi)的(de)功(gong)(gong)耗(hao)更大一些(xie)，但是(shi)功(gong)(gong)耗(hao)很小(xiao)(xiao)。并且(qie)設(she)(she)備的(de)工(gong)(gong)作環境(jing)不同(tong)，對電(dian)池的(de)需求量也不同(tong)，所以功(gong)(gong)耗(hao)也不同(tong)。

3信號不受干擾

在一些有干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)的(de)(de)(de)(de)地方(fang)，例如野外(wai)、機(ji)(ji)場、工(gong)廠(chang)等(deng)，一般(ban)采(cai)用(yong)分(fen)(fen)頻方(fang)式(shi)(shi)。分(fen)(fen)頻方(fang)式(shi)(shi)的(de)(de)(de)(de)抗干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)能(neng)力(li)不強(qiang)(qiang)，其抗干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)能(neng)力(li)主(zhu)要取決(jue)于(yu)射(she)頻功(gong)率(lv)的(de)(de)(de)(de)大小(xiao)。分(fen)(fen)頻技(ji)術(shu)(shu)的(de)(de)(de)(de)功(gong)率(lv)一般(ban)是50dB在50dB左(zuo)右時(shi)，其抗干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)能(neng)力(li)強(qiang)(qiang)。但由(you)(you)于(yu)分(fen)(fen)頻的(de)(de)(de)(de)干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)與(yu)(yu)噪(zao)聲(主(zhu)要是周(zhou)邊噪(zao)聲)具有很強(qiang)(qiang)的(de)(de)(de)(de)互通性，當分(fen)(fen)頻發(fa)(fa)(fa)射(she)的(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)超過50dB時(shi)，其抗千(qian)擾(rao)(rao)(rao)(rao)(rao)能(neng)力(li)就會減弱。另外(wai)，在一些有噪(zao)音的(de)(de)(de)(de)環境(jing)中使用(yong)分(fen)(fen)頻技(ji)術(shu)(shu)，會使分(fen)(fen)頻信(xin)(xin)(xin)號(hao)(hao)無法到(dao)達發(fa)(fa)(fa)射(she)端的(de)(de)(de)(de)接收機(ji)(ji)或(huo)者造(zao)成發(fa)(fa)(fa)射(she)端信(xin)(xin)(xin)號(hao)(hao)與(yu)(yu)接收端信(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)糟合(he)而(er)造(zao)成分(fen)(fen)頻或(huo)干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)(例如在使用(yong)室外(wai)電話時(shi)) 。而(er)采(cai)用(yong)分(fen)(fen)頻技(ji)術(shu)(shu)的(de)(de)(de)(de)無線(xian)對(dui)講系統(tong)由(you)(you)于(yu)發(fa)(fa)(fa)射(she)功(gong)率(lv)小(xiao)，分(fen)(fen)頻后的(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)強(qiang)(qiang)度比有線(xian)對(dui)講系統(tong)高(gao)很多(在實際使用(yong)中分(fen)(fen)頻設備一般(ban)可以(yi)將系統(tong)信(xin)(xin)(xin)號(hao)(hao)分(fen)(fen)頻到(dao)50dB以(yi)上(shang)),信(xin)(xin)(xin)號(hao)(hao)不受干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)。如果采(cai)用(yong)分(fen)(fen)頻技(ji)術(shu)(shu)，需(xu)要在較大的(de)(de)(de)(de)回波功(gong)率(lv)下才能(neng)實現信(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)分(fen)(fen)頻工(gong)作(如分(fen)(fen)頻器(qi)發(fa)(fa)(fa)射(she)信(xin)(xin)(xin)號(hao)(hao)與(yu)(yu)接收信(xin)(xin)(xin)號(hao)(hao)重疊時(shi)產生的(de)(de)(de)(de)千(qian)擾(rao)(rao)(rao)(rao)(rao))和(he)發(fa)(fa)(fa)送信(xin)(xin)(xin)號(hao)(hao)強(qiang)(qiang)度降低(di)(同頻帶內的(de)(de)(de)(de)兩只天線(xian)對(dui)同一信(xin)(xin)(xin)道(dao)傳(chuan)輸的(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)強(qiang)(qiang)度基本一致(zhi));如果采(cai)用(yong)混響(xiang)技(ji)術(shu)(shu)，則可以(yi)實現對(dui)無線(xian)信(xin)(xin)(xin)號(hao)(hao)干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)的(de)(de)(de)(de)抑制或(huo)降低(di)。