由(you)于(yu)(yu)在戶(hu)外(wai)(wai)、室內等區域(yu)，無(wu)線對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)的(de)(de)信號強度(du)較(jiao)(jiao)弱，而且(qie)采用(yong)(yong)頻率(lv)調制技術（如 MHZ、 NMR、 BSI等）產(chan)生(sheng)的(de)(de)信號傳輸(shu)時(shi)延(yan)大(da)，傳輸(shu)距離遠。因此有(you)(you)(you)線對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)不適(shi)合在戶(hu)外(wai)(wai)環境使(shi)(shi)用(yong)(yong)，特別是(shi)在冬(dong)天及低(di)風速(su)季節(jie)使(shi)(shi)用(yong)(yong)。雖然無(wu)線對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)也有(you)(you)(you)著不錯的(de)(de)效果。但由(you)于(yu)(yu)系(xi)(xi)統(tong)(tong)(tong)(tong)工作時(shi)會有(you)(you)(you)一(yi)(yi)定的(de)(de)干擾，使(shi)(shi)對(dui)講(jiang)(jiang)效果下(xia)降(jiang)，另外(wai)(wai)在信號較(jiao)(jiao)弱時(shi)對(dui)用(yong)(yong)戶(hu)語音(yin)產(chan)生(sheng)了影響。特別是(shi)在人(ren)員(yuan)復雜、通信距離較(jiao)(jiao)短或需要(yao)較(jiao)(jiao)長時(shi)間使(shi)(shi)用(yong)(yong)時(shi)。因此，更需要(yao)有(you)(you)(you)一(yi)(yi)個可靠的(de)(de)無(wu)線對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)提供與有(you)(you)(you)線對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)一(yi)(yi)樣(yang)的(de)(de)語音(yin)信息(xi)與控制。無(wu)線對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)具(ju)有(you)(you)(you)很高的(de)(de)靈活性，它能夠滿(man)足現場中所(suo)有(you)(you)(you)環境使(shi)(shi)用(yong)(yong)需求(qiu)并能隨時(shi)切換（如在野外(wai)(wai)、戶(hu)外(wai)(wai)電話(hua)等),用(yong)(yong)戶(hu)可以在任(ren)何地點使(shi)(shi)用(yong)(yong)、隨時(shi)、隨地進行通訊。使(shi)(shi)用(yong)(yong)方(fang)便、節(jie)省成(cheng)本、節(jie)約費用(yong)(yong)。下(xia)面我們來了解一(yi)(yi)下(xia)無(wu)線對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)它主(zhu)要(yao)是(shi)什么優點？

1.性能穩定，可靠性高

在相(xiang)同(tong)無(wu)線(xian)傳(chuan)輸距(ju)離(li)下，無(wu)線(xian)傳(chuan)輸信(xin)號(hao)(hao)更(geng)穩(wen)定(ding)由于使(shi)(shi)用了功(gong)率放大器來對無(wu)線(xian)信(xin)號(hao)(hao)進行壓縮和放大，使(shi)(shi)無(wu)線(xian)信(xin)號(hao)(hao)更(geng)加穩(wen)定(ding)可靠(kao)。無(wu)線(xian)信(xin)號(hao)(hao)在弱(ruo)電磁(ci)環境(jing)下也能(neng)(neng)保(bao)(bao)持較(jiao)(jiao)好(hao)的(de)性(xing)能(neng)(neng)。無(wu)線(xian)對講系(xi)(xi)統(tong)具(ju)有(you)發(fa)(fa)射(she)功(gong)率小(xiao)、抗(kang)千擾能(neng)(neng)力(li)強(與(yu)有(you)線(xian)對講系(xi)(xi)統(tong)比較(jiao)(jiao))和抗(kang)電磁(ci)干擾能(neng)(neng)力(li)強(與(yu)有(you)線(xian)對講系(xi)(xi)統(tong)比較(jiao)(jiao))的(de)特點。無(wu)線(xian)對講系(xi)(xi)統(tong)發(fa)(fa)射(she)信(xin)號(hao)(hao)在發(fa)(fa)射(she)前和發(fa)(fa)射(she)后均能(neng)(neng)保(bao)(bao)持良好(hao)的(de)性(xing)能(neng)(neng)，使(shi)(shi)用過(guo)程中(zhong)，發(fa)(fa)射(she)信(xin)號(hao)(hao)與(yu)接收信(xin)號(hao)(hao)完全不(bu)受任何千擾，可保(bao)(bao)持很好(hao)的(de)穩(wen)定(ding)性(xing)，具(ju)有(you)良好(hao)的(de)抗(kang)千擾性(xing)和抗(kang)低頻干擾能(neng)(neng)力(li)，即使(shi)(shi)在惡劣的(de)環境(jing)下也能(neng)(neng)保(bao)(bao)持較(jiao)(jiao)好(hao)的(de)性(xing)能(neng)(neng)。因此無(wu)線(xian)系(xi)(xi)統(tong)有(you)較(jiao)(jiao)高的(de)可靠(kao)性(xing)。

2.功(gong)耗(hao)小(xiao)、不受天氣、濕度(du)的影響

無(wu)線(xian)(xian)對講系(xi)統在(zai)不同(tong)的(de)(de)環境(jing)中，無(wu)線(xian)(xian)通(tong)信設(she)備和有線(xian)(xian)通(tong)信設(she)備一樣都要進行電能的(de)(de)消耗(hao)(hao)。當(dang)環境(jing)溫度(du)在(zai)-40°C以下(xia)時(shi)，無(wu)線(xian)(xian)通(tong)信設(she)備需要每(mei)天(tian)工作8小時(shi)左(zuo)右(you);當(dang)環境(jing)溫度(du)為(wei)-20°C時(shi)，每(mei)天(tian)工作8小時(shi)左(zuo)右(you);當(dang)環境(jing)溫度(du)為(wei)-30°C時(shi)，每(mei)天(tian)工作4小時(shi)左(zuo)右(you)。目前市場上常見的(de)(de)無(wu)線(xian)(xian)對講系(xi)統有兩(liang)種電源(yuan)(yuan)輸(shu)(shu)入方(fang)式，一種是電源(yuan)(yuan)輸(shu)(shu)入，另一種是電源(yuan)(yuan)輸(shu)(shu)出。從(cong)這兩(liang)種方(fang)式對系(xi)統的(de)(de)功(gong)耗(hao)(hao)來看，電源(yuan)(yuan)輸(shu)(shu)入方(fang)式的(de)(de)功(gong)耗(hao)(hao)更大一些，但是功(gong)耗(hao)(hao)很小。并且設(she)備的(de)(de)工作環境(jing)不同(tong)，對電池(chi)的(de)(de)需求量也不同(tong)，所以功(gong)耗(hao)(hao)也不同(tong)。

3信號不受干擾

在(zai)一(yi)(yi)(yi)(yi)些有干(gan)擾(rao)(rao)的(de)(de)(de)地方，例如(ru)野(ye)外(wai)(wai)(wai)、機場、工廠等，一(yi)(yi)(yi)(yi)般采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)方式。分(fen)(fen)(fen)頻(pin)(pin)方式的(de)(de)(de)抗干(gan)擾(rao)(rao)能(neng)(neng)力不強(qiang)(qiang)，其抗干(gan)擾(rao)(rao)能(neng)(neng)力主(zhu)要取決于射(she)頻(pin)(pin)功率的(de)(de)(de)大(da)(da)小。分(fen)(fen)(fen)頻(pin)(pin)技(ji)(ji)(ji)術(shu)(shu)的(de)(de)(de)功率一(yi)(yi)(yi)(yi)般是50dB在(zai)50dB左(zuo)右時(shi)(shi)(shi)，其抗干(gan)擾(rao)(rao)能(neng)(neng)力強(qiang)(qiang)。但由(you)于分(fen)(fen)(fen)頻(pin)(pin)的(de)(de)(de)干(gan)擾(rao)(rao)與噪(zao)聲(主(zhu)要是周邊(bian)噪(zao)聲)具有很(hen)強(qiang)(qiang)的(de)(de)(de)互通性，當(dang)分(fen)(fen)(fen)頻(pin)(pin)發射(she)的(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)超過50dB時(shi)(shi)(shi)，其抗千擾(rao)(rao)能(neng)(neng)力就會(hui)減弱。另外(wai)(wai)(wai)，在(zai)一(yi)(yi)(yi)(yi)些有噪(zao)音的(de)(de)(de)環(huan)境(jing)中使(shi)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)技(ji)(ji)(ji)術(shu)(shu)，會(hui)使(shi)分(fen)(fen)(fen)頻(pin)(pin)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)無法到達發射(she)端的(de)(de)(de)接(jie)收(shou)機或者造(zao)成發射(she)端信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)與接(jie)收(shou)端信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)糟(zao)合而造(zao)成分(fen)(fen)(fen)頻(pin)(pin)或干(gan)擾(rao)(rao)(例如(ru)在(zai)使(shi)用(yong)(yong)室外(wai)(wai)(wai)電話時(shi)(shi)(shi)) 。而采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)技(ji)(ji)(ji)術(shu)(shu)的(de)(de)(de)無線對(dui)講(jiang)系(xi)統由(you)于發射(she)功率小，分(fen)(fen)(fen)頻(pin)(pin)后的(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)強(qiang)(qiang)度比有線對(dui)講(jiang)系(xi)統高很(hen)多(duo)(在(zai)實(shi)際使(shi)用(yong)(yong)中分(fen)(fen)(fen)頻(pin)(pin)設(she)備一(yi)(yi)(yi)(yi)般可以(yi)將系(xi)統信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)分(fen)(fen)(fen)頻(pin)(pin)到50dB以(yi)上),信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)不受干(gan)擾(rao)(rao)。如(ru)果采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)技(ji)(ji)(ji)術(shu)(shu)，需要在(zai)較(jiao)大(da)(da)的(de)(de)(de)回波功率下才能(neng)(neng)實(shi)現信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)分(fen)(fen)(fen)頻(pin)(pin)工作(如(ru)分(fen)(fen)(fen)頻(pin)(pin)器(qi)發射(she)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)與接(jie)收(shou)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)重疊時(shi)(shi)(shi)產生(sheng)的(de)(de)(de)千擾(rao)(rao))和(he)發送信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)強(qiang)(qiang)度降(jiang)低(同(tong)頻(pin)(pin)帶(dai)內的(de)(de)(de)兩(liang)只天線對(dui)同(tong)一(yi)(yi)(yi)(yi)信(xin)(xin)(xin)(xin)(xin)道傳輸(shu)的(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)強(qiang)(qiang)度基本一(yi)(yi)(yi)(yi)致);如(ru)果采用(yong)(yong)混響技(ji)(ji)(ji)術(shu)(shu)，則可以(yi)實(shi)現對(dui)無線信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)干(gan)擾(rao)(rao)的(de)(de)(de)抑制或降(jiang)低。