由于(yu)(yu)在(zai)戶(hu)(hu)外、室內等(deng)(deng)區域，無(wu)(wu)線(xian)對(dui)講(jiang)系(xi)統(tong)(tong)的(de)信(xin)(xin)號(hao)強度較弱，而且采用(yong)(yong)(yong)(yong)(yong)(yong)頻(pin)率調制技術（如 MHZ、 NMR、 BSI等(deng)(deng)）產(chan)生(sheng)的(de)信(xin)(xin)號(hao)傳輸時(shi)延大，傳輸距(ju)離(li)遠。因此有(you)(you)(you)線(xian)對(dui)講(jiang)系(xi)統(tong)(tong)不(bu)適合(he)在(zai)戶(hu)(hu)外環境使(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)，特別是在(zai)冬(dong)天及低風速季節使(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)。雖然無(wu)(wu)線(xian)對(dui)講(jiang)系(xi)統(tong)(tong)也有(you)(you)(you)著不(bu)錯的(de)效果。但(dan)由于(yu)(yu)系(xi)統(tong)(tong)工作(zuo)時(shi)會有(you)(you)(you)一定(ding)的(de)干擾，使(shi)(shi)對(dui)講(jiang)效果下降，另(ling)外在(zai)信(xin)(xin)號(hao)較弱時(shi)對(dui)用(yong)(yong)(yong)(yong)(yong)(yong)戶(hu)(hu)語(yu)音(yin)產(chan)生(sheng)了影響。特別是在(zai)人員(yuan)復雜、通(tong)信(xin)(xin)距(ju)離(li)較短或需要(yao)較長時(shi)間使(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)時(shi)。因此，更需要(yao)有(you)(you)(you)一個可靠的(de)無(wu)(wu)線(xian)對(dui)講(jiang)系(xi)統(tong)(tong)提供與有(you)(you)(you)線(xian)對(dui)講(jiang)系(xi)統(tong)(tong)一樣(yang)的(de)語(yu)音(yin)信(xin)(xin)息與控(kong)制。無(wu)(wu)線(xian)對(dui)講(jiang)系(xi)統(tong)(tong)具有(you)(you)(you)很高的(de)靈活性，它能夠滿足現場中(zhong)所(suo)有(you)(you)(you)環境使(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)需求并能隨(sui)(sui)時(shi)切(qie)換（如在(zai)野外、戶(hu)(hu)外電話(hua)等(deng)(deng)),用(yong)(yong)(yong)(yong)(yong)(yong)戶(hu)(hu)可以在(zai)任何(he)地(di)點使(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)、隨(sui)(sui)時(shi)、隨(sui)(sui)地(di)進行通(tong)訊(xun)。使(shi)(shi)用(yong)(yong)(yong)(yong)(yong)(yong)方(fang)便(bian)、節省成本(ben)、節約費用(yong)(yong)(yong)(yong)(yong)(yong)。下面我們來了解一下無(wu)(wu)線(xian)對(dui)講(jiang)系(xi)統(tong)(tong)它主要(yao)是什么優點？

1.性能穩定(ding)，可靠性高

在(zai)相(xiang)同無(wu)線(xian)傳(chuan)輸距離下，無(wu)線(xian)傳(chuan)輸信(xin)(xin)號(hao)(hao)(hao)更穩定由于使(shi)(shi)用了功率放(fang)大器來對無(wu)線(xian)信(xin)(xin)號(hao)(hao)(hao)進(jin)行壓(ya)縮(suo)和(he)(he)放(fang)大，使(shi)(shi)無(wu)線(xian)信(xin)(xin)號(hao)(hao)(hao)更加穩定可靠。無(wu)線(xian)信(xin)(xin)號(hao)(hao)(hao)在(zai)弱電磁(ci)環(huan)(huan)境下也能(neng)(neng)(neng)(neng)保(bao)(bao)持(chi)(chi)較(jiao)(jiao)(jiao)好(hao)的(de)(de)性(xing)能(neng)(neng)(neng)(neng)。無(wu)線(xian)對講系統(tong)具(ju)有發射(she)功率小(xiao)、抗(kang)千(qian)擾能(neng)(neng)(neng)(neng)力(li)強(與有線(xian)對講系統(tong)比較(jiao)(jiao)(jiao))和(he)(he)抗(kang)電磁(ci)干(gan)擾能(neng)(neng)(neng)(neng)力(li)強(與有線(xian)對講系統(tong)比較(jiao)(jiao)(jiao))的(de)(de)特點。無(wu)線(xian)對講系統(tong)發射(she)信(xin)(xin)號(hao)(hao)(hao)在(zai)發射(she)前(qian)和(he)(he)發射(she)后均(jun)能(neng)(neng)(neng)(neng)保(bao)(bao)持(chi)(chi)良好(hao)的(de)(de)性(xing)能(neng)(neng)(neng)(neng)，使(shi)(shi)用過程中，發射(she)信(xin)(xin)號(hao)(hao)(hao)與接收信(xin)(xin)號(hao)(hao)(hao)完(wan)全不受任(ren)何(he)千(qian)擾，可保(bao)(bao)持(chi)(chi)很好(hao)的(de)(de)穩定性(xing)，具(ju)有良好(hao)的(de)(de)抗(kang)千(qian)擾性(xing)和(he)(he)抗(kang)低頻干(gan)擾能(neng)(neng)(neng)(neng)力(li)，即(ji)使(shi)(shi)在(zai)惡劣的(de)(de)環(huan)(huan)境下也能(neng)(neng)(neng)(neng)保(bao)(bao)持(chi)(chi)較(jiao)(jiao)(jiao)好(hao)的(de)(de)性(xing)能(neng)(neng)(neng)(neng)。因此無(wu)線(xian)系統(tong)有較(jiao)(jiao)(jiao)高的(de)(de)可靠性(xing)。

2.功耗小、不(bu)受天氣(qi)、濕(shi)度的影響

無(wu)線(xian)(xian)(xian)(xian)(xian)對講系統(tong)在(zai)不(bu)同(tong)的(de)環(huan)境(jing)中(zhong)，無(wu)線(xian)(xian)(xian)(xian)(xian)通信設(she)(she)備和有線(xian)(xian)(xian)(xian)(xian)通信設(she)(she)備一樣都要進行電能的(de)消耗(hao)。當環(huan)境(jing)溫度(du)在(zai)-40°C以下時，無(wu)線(xian)(xian)(xian)(xian)(xian)通信設(she)(she)備需要每天(tian)工作(zuo)(zuo)8小時左(zuo)右(you)(you);當環(huan)境(jing)溫度(du)為(wei)-20°C時，每天(tian)工作(zuo)(zuo)8小時左(zuo)右(you)(you);當環(huan)境(jing)溫度(du)為(wei)-30°C時，每天(tian)工作(zuo)(zuo)4小時左(zuo)右(you)(you)。目前(qian)市場上常見(jian)的(de)無(wu)線(xian)(xian)(xian)(xian)(xian)對講系統(tong)有兩種(zhong)電源輸(shu)入方式，一種(zhong)是電源輸(shu)入，另一種(zhong)是電源輸(shu)出。從這兩種(zhong)方式對系統(tong)的(de)功耗(hao)來看(kan)，電源輸(shu)入方式的(de)功耗(hao)更大一些，但(dan)是功耗(hao)很小。并且設(she)(she)備的(de)工作(zuo)(zuo)環(huan)境(jing)不(bu)同(tong)，對電池的(de)需求量(liang)也(ye)不(bu)同(tong)，所以功耗(hao)也(ye)不(bu)同(tong)。

3信號不受干擾

在(zai)一些(xie)有干(gan)(gan)擾(rao)(rao)的(de)地方(fang)(fang)，例(li)如(ru)野外、機(ji)場、工廠等，一般(ban)采(cai)用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)方(fang)(fang)式。分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)方(fang)(fang)式的(de)抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)力(li)不強(qiang)，其(qi)抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)力(li)主要(yao)取決(jue)于(yu)射(she)頻(pin)(pin)(pin)(pin)功率的(de)大小(xiao)。分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術(shu)(shu)(shu)的(de)功率一般(ban)是(shi)(shi)50dB在(zai)50dB左右時，其(qi)抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)力(li)強(qiang)。但由于(yu)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)的(de)干(gan)(gan)擾(rao)(rao)與(yu)噪(zao)(zao)聲(sheng)(sheng)(主要(yao)是(shi)(shi)周(zhou)邊(bian)噪(zao)(zao)聲(sheng)(sheng))具有很(hen)強(qiang)的(de)互通性，當(dang)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)發(fa)(fa)射(she)的(de)信(xin)(xin)(xin)號(hao)超過(guo)50dB時，其(qi)抗(kang)千(qian)擾(rao)(rao)能(neng)力(li)就會減弱(ruo)。另(ling)外，在(zai)一些(xie)有噪(zao)(zao)音的(de)環境(jing)中使(shi)用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術(shu)(shu)(shu)，會使(shi)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)信(xin)(xin)(xin)號(hao)無法到(dao)達發(fa)(fa)射(she)端的(de)接收(shou)機(ji)或者造成發(fa)(fa)射(she)端信(xin)(xin)(xin)號(hao)與(yu)接收(shou)端信(xin)(xin)(xin)號(hao)的(de)糟(zao)合而造成分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)或干(gan)(gan)擾(rao)(rao)(例(li)如(ru)在(zai)使(shi)用(yong)室外電話(hua)時) 。而采(cai)用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術(shu)(shu)(shu)的(de)無線對(dui)講(jiang)系統(tong)(tong)由于(yu)發(fa)(fa)射(she)功率小(xiao)，分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)后的(de)信(xin)(xin)(xin)號(hao)強(qiang)度(du)(du)比有線對(dui)講(jiang)系統(tong)(tong)高很(hen)多(在(zai)實(shi)際使(shi)用(yong)中分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)設備一般(ban)可以將(jiang)系統(tong)(tong)信(xin)(xin)(xin)號(hao)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)到(dao)50dB以上),信(xin)(xin)(xin)號(hao)不受干(gan)(gan)擾(rao)(rao)。如(ru)果采(cai)用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術(shu)(shu)(shu)，需要(yao)在(zai)較大的(de)回波功率下(xia)才能(neng)實(shi)現(xian)信(xin)(xin)(xin)號(hao)的(de)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)工作(如(ru)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)器發(fa)(fa)射(she)信(xin)(xin)(xin)號(hao)與(yu)接收(shou)信(xin)(xin)(xin)號(hao)重疊時產生的(de)千(qian)擾(rao)(rao))和發(fa)(fa)送信(xin)(xin)(xin)號(hao)強(qiang)度(du)(du)降低(di)(同(tong)頻(pin)(pin)(pin)(pin)帶內的(de)兩(liang)只天線對(dui)同(tong)一信(xin)(xin)(xin)道傳輸的(de)信(xin)(xin)(xin)號(hao)強(qiang)度(du)(du)基本一致);如(ru)果采(cai)用(yong)混響技(ji)(ji)(ji)術(shu)(shu)(shu)，則可以實(shi)現(xian)對(dui)無線信(xin)(xin)(xin)號(hao)干(gan)(gan)擾(rao)(rao)的(de)抑制或降低(di)。