由于(yu)在(zai)戶外、室內等區域，無線對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)的(de)信號強度(du)較弱，而且采用(yong)(yong)(yong)頻率調制(zhi)技術（如 MHZ、 NMR、 BSI等）產(chan)生(sheng)的(de)信號傳輸時延大，傳輸距離(li)遠。因此有(you)(you)(you)線對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)不(bu)適合在(zai)戶外環(huan)境使(shi)(shi)用(yong)(yong)(yong)，特別是在(zai)冬天及低風速季節使(shi)(shi)用(yong)(yong)(yong)。雖(sui)然無線對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)也有(you)(you)(you)著(zhu)不(bu)錯的(de)效果。但由于(yu)系(xi)(xi)統(tong)(tong)工作時會(hui)有(you)(you)(you)一定的(de)干擾，使(shi)(shi)對(dui)(dui)講(jiang)效果下(xia)降，另外在(zai)信號較弱時對(dui)(dui)用(yong)(yong)(yong)戶語音產(chan)生(sheng)了影響(xiang)。特別是在(zai)人員復雜、通信距離(li)較短或需(xu)(xu)要(yao)較長時間使(shi)(shi)用(yong)(yong)(yong)時。因此，更需(xu)(xu)要(yao)有(you)(you)(you)一個可靠(kao)的(de)無線對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)提供(gong)與(yu)有(you)(you)(you)線對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)一樣的(de)語音信息與(yu)控制(zhi)。無線對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)具有(you)(you)(you)很高的(de)靈(ling)活性(xing)，它能夠(gou)滿足現(xian)場中所有(you)(you)(you)環(huan)境使(shi)(shi)用(yong)(yong)(yong)需(xu)(xu)求并能隨(sui)時切換(huan)（如在(zai)野外、戶外電話等),用(yong)(yong)(yong)戶可以在(zai)任何地點使(shi)(shi)用(yong)(yong)(yong)、隨(sui)時、隨(sui)地進行通訊。使(shi)(shi)用(yong)(yong)(yong)方便(bian)、節省(sheng)成本、節約費(fei)用(yong)(yong)(yong)。下(xia)面我(wo)們(men)來了解(jie)一下(xia)無線對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)它主要(yao)是什么優(you)點？

1.性能穩定，可靠(kao)性高

在(zai)(zai)相同無(wu)(wu)(wu)(wu)線(xian)(xian)傳(chuan)輸距離下，無(wu)(wu)(wu)(wu)線(xian)(xian)傳(chuan)輸信(xin)號(hao)更(geng)穩(wen)定由(you)于使用了(le)功率放大器來對(dui)(dui)無(wu)(wu)(wu)(wu)線(xian)(xian)信(xin)號(hao)進行壓(ya)縮和放大，使無(wu)(wu)(wu)(wu)線(xian)(xian)信(xin)號(hao)更(geng)加(jia)穩(wen)定可(ke)靠(kao)。無(wu)(wu)(wu)(wu)線(xian)(xian)信(xin)號(hao)在(zai)(zai)弱電磁(ci)環境下也能(neng)(neng)(neng)保(bao)持(chi)(chi)較(jiao)好的(de)(de)性能(neng)(neng)(neng)。無(wu)(wu)(wu)(wu)線(xian)(xian)對(dui)(dui)講系統(tong)(tong)具有(you)(you)發射(she)功率小、抗千擾(rao)能(neng)(neng)(neng)力(li)強(與有(you)(you)線(xian)(xian)對(dui)(dui)講系統(tong)(tong)比較(jiao))和抗電磁(ci)干擾(rao)能(neng)(neng)(neng)力(li)強(與有(you)(you)線(xian)(xian)對(dui)(dui)講系統(tong)(tong)比較(jiao))的(de)(de)特點。無(wu)(wu)(wu)(wu)線(xian)(xian)對(dui)(dui)講系統(tong)(tong)發射(she)信(xin)號(hao)在(zai)(zai)發射(she)前和發射(she)后均能(neng)(neng)(neng)保(bao)持(chi)(chi)良好的(de)(de)性能(neng)(neng)(neng)，使用過程中，發射(she)信(xin)號(hao)與接收信(xin)號(hao)完全不受任(ren)何千擾(rao)，可(ke)保(bao)持(chi)(chi)很好的(de)(de)穩(wen)定性，具有(you)(you)良好的(de)(de)抗千擾(rao)性和抗低頻(pin)干擾(rao)能(neng)(neng)(neng)力(li)，即使在(zai)(zai)惡劣的(de)(de)環境下也能(neng)(neng)(neng)保(bao)持(chi)(chi)較(jiao)好的(de)(de)性能(neng)(neng)(neng)。因此(ci)無(wu)(wu)(wu)(wu)線(xian)(xian)系統(tong)(tong)有(you)(you)較(jiao)高(gao)的(de)(de)可(ke)靠(kao)性。

2.功耗小、不受天氣(qi)、濕度的(de)影響

無(wu)線(xian)(xian)對(dui)(dui)講系統在不同(tong)的(de)(de)環(huan)(huan)(huan)境(jing)中，無(wu)線(xian)(xian)通(tong)信設備和有線(xian)(xian)通(tong)信設備一(yi)樣都要(yao)進行電能的(de)(de)消耗(hao)。當環(huan)(huan)(huan)境(jing)溫(wen)度(du)在-40°C以下時(shi)(shi)(shi)，無(wu)線(xian)(xian)通(tong)信設備需要(yao)每(mei)天工(gong)作8小時(shi)(shi)(shi)左右;當環(huan)(huan)(huan)境(jing)溫(wen)度(du)為-20°C時(shi)(shi)(shi)，每(mei)天工(gong)作8小時(shi)(shi)(shi)左右;當環(huan)(huan)(huan)境(jing)溫(wen)度(du)為-30°C時(shi)(shi)(shi)，每(mei)天工(gong)作4小時(shi)(shi)(shi)左右。目前市場上常見的(de)(de)無(wu)線(xian)(xian)對(dui)(dui)講系統有兩種(zhong)(zhong)電源輸(shu)入方式(shi)，一(yi)種(zhong)(zhong)是(shi)(shi)電源輸(shu)入，另(ling)一(yi)種(zhong)(zhong)是(shi)(shi)電源輸(shu)出。從這兩種(zhong)(zhong)方式(shi)對(dui)(dui)系統的(de)(de)功(gong)耗(hao)來看，電源輸(shu)入方式(shi)的(de)(de)功(gong)耗(hao)更大一(yi)些，但是(shi)(shi)功(gong)耗(hao)很小。并且設備的(de)(de)工(gong)作環(huan)(huan)(huan)境(jing)不同(tong)，對(dui)(dui)電池的(de)(de)需求量也(ye)不同(tong)，所以功(gong)耗(hao)也(ye)不同(tong)。

3信號不受干擾

在(zai)(zai)一(yi)些有(you)干(gan)(gan)擾(rao)的(de)(de)(de)地方，例如(ru)野外(wai)、機(ji)場、工廠(chang)等，一(yi)般采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)方式。分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)方式的(de)(de)(de)抗(kang)(kang)干(gan)(gan)擾(rao)能力不(bu)強(qiang)(qiang)(qiang)，其(qi)抗(kang)(kang)干(gan)(gan)擾(rao)能力主要取決于(yu)射頻(pin)(pin)(pin)(pin)功(gong)(gong)率(lv)(lv)的(de)(de)(de)大小(xiao)。分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技術的(de)(de)(de)功(gong)(gong)率(lv)(lv)一(yi)般是50dB在(zai)(zai)50dB左右時(shi)，其(qi)抗(kang)(kang)干(gan)(gan)擾(rao)能力強(qiang)(qiang)(qiang)。但(dan)由(you)于(yu)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)的(de)(de)(de)干(gan)(gan)擾(rao)與噪(zao)聲(主要是周邊噪(zao)聲)具(ju)有(you)很強(qiang)(qiang)(qiang)的(de)(de)(de)互通性，當分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)發(fa)(fa)射的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)超過(guo)50dB時(shi)，其(qi)抗(kang)(kang)千擾(rao)能力就(jiu)會減弱。另(ling)外(wai)，在(zai)(zai)一(yi)些有(you)噪(zao)音的(de)(de)(de)環境中(zhong)使用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技術，會使分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)無法(fa)到達(da)發(fa)(fa)射端的(de)(de)(de)接(jie)收機(ji)或者造(zao)成發(fa)(fa)射端信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接(jie)收端信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)糟(zao)合而造(zao)成分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)或干(gan)(gan)擾(rao)(例如(ru)在(zai)(zai)使用(yong)(yong)室外(wai)電話時(shi)) 。而采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技術的(de)(de)(de)無線(xian)對(dui)講系(xi)統(tong)由(you)于(yu)發(fa)(fa)射功(gong)(gong)率(lv)(lv)小(xiao)，分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)后(hou)的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)(qiang)度比有(you)線(xian)對(dui)講系(xi)統(tong)高很多(在(zai)(zai)實(shi)際(ji)使用(yong)(yong)中(zhong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)設備一(yi)般可以將系(xi)統(tong)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)到50dB以上),信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)不(bu)受干(gan)(gan)擾(rao)。如(ru)果采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技術，需(xu)要在(zai)(zai)較大的(de)(de)(de)回波功(gong)(gong)率(lv)(lv)下才能實(shi)現信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)工作(如(ru)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)器(qi)發(fa)(fa)射信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接(jie)收信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)重(zhong)疊時(shi)產生(sheng)的(de)(de)(de)千擾(rao))和發(fa)(fa)送信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)(qiang)度降低(同頻(pin)(pin)(pin)(pin)帶(dai)內的(de)(de)(de)兩只(zhi)天線(xian)對(dui)同一(yi)信(xin)(xin)(xin)(xin)道(dao)傳輸(shu)的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)(qiang)度基(ji)本一(yi)致);如(ru)果采(cai)用(yong)(yong)混響技術，則(ze)可以實(shi)現對(dui)無線(xian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)干(gan)(gan)擾(rao)的(de)(de)(de)抑(yi)制或降低。