由于在(zai)戶(hu)(hu)外、室內(nei)等區域，無(wu)(wu)線(xian)對講系(xi)(xi)統(tong)(tong)(tong)(tong)的(de)(de)信號(hao)強度較弱，而(er)且采用(yong)頻率(lv)調制(zhi)技術（如 MHZ、 NMR、 BSI等）產(chan)生的(de)(de)信號(hao)傳輸(shu)時(shi)延(yan)大(da)，傳輸(shu)距離遠。因此有(you)(you)(you)線(xian)對講系(xi)(xi)統(tong)(tong)(tong)(tong)不(bu)適合在(zai)戶(hu)(hu)外環(huan)境使(shi)(shi)用(yong)，特別是(shi)在(zai)冬(dong)天及低(di)風速季節使(shi)(shi)用(yong)。雖然無(wu)(wu)線(xian)對講系(xi)(xi)統(tong)(tong)(tong)(tong)也(ye)有(you)(you)(you)著不(bu)錯的(de)(de)效果(guo)。但由于系(xi)(xi)統(tong)(tong)(tong)(tong)工作時(shi)會有(you)(you)(you)一(yi)定的(de)(de)干擾，使(shi)(shi)對講效果(guo)下降，另(ling)外在(zai)信號(hao)較弱時(shi)對用(yong)戶(hu)(hu)語音產(chan)生了影(ying)響。特別是(shi)在(zai)人員復雜、通信距離較短或需要(yao)(yao)較長時(shi)間使(shi)(shi)用(yong)時(shi)。因此，更需要(yao)(yao)有(you)(you)(you)一(yi)個(ge)可靠(kao)的(de)(de)無(wu)(wu)線(xian)對講系(xi)(xi)統(tong)(tong)(tong)(tong)提供與(yu)(yu)有(you)(you)(you)線(xian)對講系(xi)(xi)統(tong)(tong)(tong)(tong)一(yi)樣的(de)(de)語音信息與(yu)(yu)控制(zhi)。無(wu)(wu)線(xian)對講系(xi)(xi)統(tong)(tong)(tong)(tong)具有(you)(you)(you)很高的(de)(de)靈活性，它能夠(gou)滿足現場中(zhong)所有(you)(you)(you)環(huan)境使(shi)(shi)用(yong)需求(qiu)并能隨(sui)(sui)時(shi)切換（如在(zai)野(ye)外、戶(hu)(hu)外電話等),用(yong)戶(hu)(hu)可以在(zai)任何地(di)點(dian)使(shi)(shi)用(yong)、隨(sui)(sui)時(shi)、隨(sui)(sui)地(di)進行通訊。使(shi)(shi)用(yong)方便、節省成本、節約費用(yong)。下面我們來了解(jie)一(yi)下無(wu)(wu)線(xian)對講系(xi)(xi)統(tong)(tong)(tong)(tong)它主要(yao)(yao)是(shi)什(shen)么優點(dian)？

1.性能穩定，可靠性高

在(zai)相同無(wu)(wu)線(xian)(xian)(xian)傳輸(shu)距離(li)下，無(wu)(wu)線(xian)(xian)(xian)傳輸(shu)信(xin)號(hao)(hao)(hao)更穩定(ding)由(you)于使(shi)用了功(gong)率放大器來對無(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)(hao)(hao)進行壓縮和(he)放大，使(shi)無(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)(hao)(hao)更加穩定(ding)可靠(kao)。無(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)(hao)(hao)在(zai)弱電磁環境下也能(neng)(neng)(neng)(neng)保(bao)持(chi)較(jiao)好的(de)性(xing)能(neng)(neng)(neng)(neng)。無(wu)(wu)線(xian)(xian)(xian)對講系(xi)統具(ju)有發(fa)射功(gong)率小、抗(kang)千擾能(neng)(neng)(neng)(neng)力強(與(yu)有線(xian)(xian)(xian)對講系(xi)統比較(jiao))和(he)抗(kang)電磁干擾能(neng)(neng)(neng)(neng)力強(與(yu)有線(xian)(xian)(xian)對講系(xi)統比較(jiao))的(de)特點。無(wu)(wu)線(xian)(xian)(xian)對講系(xi)統發(fa)射信(xin)號(hao)(hao)(hao)在(zai)發(fa)射前和(he)發(fa)射后均能(neng)(neng)(neng)(neng)保(bao)持(chi)良好的(de)性(xing)能(neng)(neng)(neng)(neng)，使(shi)用過程中，發(fa)射信(xin)號(hao)(hao)(hao)與(yu)接收信(xin)號(hao)(hao)(hao)完全不受任何(he)千擾，可保(bao)持(chi)很好的(de)穩定(ding)性(xing)，具(ju)有良好的(de)抗(kang)千擾性(xing)和(he)抗(kang)低(di)頻干擾能(neng)(neng)(neng)(neng)力，即使(shi)在(zai)惡劣(lie)的(de)環境下也能(neng)(neng)(neng)(neng)保(bao)持(chi)較(jiao)好的(de)性(xing)能(neng)(neng)(neng)(neng)。因此無(wu)(wu)線(xian)(xian)(xian)系(xi)統有較(jiao)高的(de)可靠(kao)性(xing)。

2.功(gong)耗小(xiao)、不(bu)受天氣、濕度的影(ying)響

無線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)統在不同的(de)(de)環(huan)境中(zhong)，無線(xian)(xian)通信(xin)設(she)備和有(you)(you)線(xian)(xian)通信(xin)設(she)備一(yi)樣都(dou)要進(jin)行電(dian)(dian)(dian)能(neng)的(de)(de)消耗(hao)。當(dang)環(huan)境溫度在-40°C以下時(shi)，無線(xian)(xian)通信(xin)設(she)備需要每天(tian)工(gong)作8小時(shi)左(zuo)右;當(dang)環(huan)境溫度為-20°C時(shi)，每天(tian)工(gong)作8小時(shi)左(zuo)右;當(dang)環(huan)境溫度為-30°C時(shi)，每天(tian)工(gong)作4小時(shi)左(zuo)右。目前市場上(shang)常見的(de)(de)無線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)統有(you)(you)兩種(zhong)電(dian)(dian)(dian)源(yuan)輸(shu)(shu)入(ru)方(fang)式，一(yi)種(zhong)是(shi)電(dian)(dian)(dian)源(yuan)輸(shu)(shu)入(ru)，另一(yi)種(zhong)是(shi)電(dian)(dian)(dian)源(yuan)輸(shu)(shu)出。從這兩種(zhong)方(fang)式對(dui)系(xi)統的(de)(de)功(gong)耗(hao)來看，電(dian)(dian)(dian)源(yuan)輸(shu)(shu)入(ru)方(fang)式的(de)(de)功(gong)耗(hao)更大一(yi)些(xie)，但是(shi)功(gong)耗(hao)很(hen)小。并且(qie)設(she)備的(de)(de)工(gong)作環(huan)境不同，對(dui)電(dian)(dian)(dian)池(chi)的(de)(de)需求量也不同，所以功(gong)耗(hao)也不同。

3信號不受干擾

在(zai)一(yi)些有(you)干(gan)擾(rao)(rao)(rao)(rao)的(de)(de)(de)地方(fang)，例如(ru)野(ye)外、機(ji)場、工(gong)廠(chang)等，一(yi)般采(cai)用(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)方(fang)式(shi)。分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)方(fang)式(shi)的(de)(de)(de)抗(kang)干(gan)擾(rao)(rao)(rao)(rao)能(neng)力(li)不(bu)強，其抗(kang)干(gan)擾(rao)(rao)(rao)(rao)能(neng)力(li)主要取決于射(she)(she)(she)頻(pin)(pin)(pin)(pin)(pin)功率(lv)的(de)(de)(de)大(da)小(xiao)。分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技術(shu)的(de)(de)(de)功率(lv)一(yi)般是50dB在(zai)50dB左右(you)時(shi)(shi)，其抗(kang)干(gan)擾(rao)(rao)(rao)(rao)能(neng)力(li)強。但由(you)于分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)的(de)(de)(de)干(gan)擾(rao)(rao)(rao)(rao)與噪(zao)聲(主要是周邊噪(zao)聲)具有(you)很強的(de)(de)(de)互通性，當分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)發(fa)射(she)(she)(she)的(de)(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)超過50dB時(shi)(shi)，其抗(kang)千(qian)(qian)擾(rao)(rao)(rao)(rao)能(neng)力(li)就會(hui)減弱(ruo)。另外，在(zai)一(yi)些有(you)噪(zao)音的(de)(de)(de)環(huan)境中使用(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技術(shu)，會(hui)使分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)無(wu)法到(dao)達發(fa)射(she)(she)(she)端的(de)(de)(de)接收機(ji)或(huo)者造成發(fa)射(she)(she)(she)端信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)與接收端信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)糟合而造成分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)或(huo)干(gan)擾(rao)(rao)(rao)(rao)(例如(ru)在(zai)使用(yong)室(shi)外電話(hua)時(shi)(shi)) 。而采(cai)用(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技術(shu)的(de)(de)(de)無(wu)線(xian)(xian)對(dui)講(jiang)系統(tong)(tong)由(you)于發(fa)射(she)(she)(she)功率(lv)小(xiao)，分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)后的(de)(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)強度比(bi)有(you)線(xian)(xian)對(dui)講(jiang)系統(tong)(tong)高很多(在(zai)實(shi)(shi)際使用(yong)中分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)設備一(yi)般可(ke)以(yi)將系統(tong)(tong)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)到(dao)50dB以(yi)上),信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)不(bu)受干(gan)擾(rao)(rao)(rao)(rao)。如(ru)果(guo)(guo)采(cai)用(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技術(shu)，需(xu)要在(zai)較大(da)的(de)(de)(de)回波功率(lv)下才(cai)能(neng)實(shi)(shi)現(xian)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)工(gong)作(如(ru)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)器發(fa)射(she)(she)(she)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)與接收信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)重疊時(shi)(shi)產生的(de)(de)(de)千(qian)(qian)擾(rao)(rao)(rao)(rao))和發(fa)送信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)強度降(jiang)低(di)(同(tong)頻(pin)(pin)(pin)(pin)(pin)帶內的(de)(de)(de)兩只天(tian)線(xian)(xian)對(dui)同(tong)一(yi)信(xin)(xin)道傳輸的(de)(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)強度基(ji)本一(yi)致);如(ru)果(guo)(guo)采(cai)用(yong)混(hun)響(xiang)技術(shu)，則可(ke)以(yi)實(shi)(shi)現(xian)對(dui)無(wu)線(xian)(xian)信(xin)(xin)號(hao)(hao)(hao)(hao)(hao)干(gan)擾(rao)(rao)(rao)(rao)的(de)(de)(de)抑制或(huo)降(jiang)低(di)。