由于在戶(hu)(hu)外(wai)(wai)、室內等區域，無(wu)線對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)的信(xin)號(hao)強(qiang)度較弱，而且采用(yong)頻率調制(zhi)(zhi)技術（如 MHZ、 NMR、 BSI等）產(chan)生(sheng)的信(xin)號(hao)傳輸時(shi)(shi)延大，傳輸距離遠(yuan)。因此有(you)(you)線對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)不適合在戶(hu)(hu)外(wai)(wai)環境使(shi)用(yong)，特別是在冬天及低風速季節(jie)(jie)使(shi)用(yong)。雖然(ran)無(wu)線對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)也有(you)(you)著(zhu)不錯的效果(guo)。但由于系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)工作時(shi)(shi)會有(you)(you)一定的干擾，使(shi)對(dui)講(jiang)(jiang)(jiang)效果(guo)下(xia)降，另(ling)外(wai)(wai)在信(xin)號(hao)較弱時(shi)(shi)對(dui)用(yong)戶(hu)(hu)語音(yin)產(chan)生(sheng)了影響。特別是在人(ren)員復(fu)雜、通(tong)信(xin)距離較短或需要(yao)較長時(shi)(shi)間使(shi)用(yong)時(shi)(shi)。因此，更需要(yao)有(you)(you)一個可靠(kao)的無(wu)線對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)提供與(yu)(yu)有(you)(you)線對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)一樣的語音(yin)信(xin)息與(yu)(yu)控制(zhi)(zhi)。無(wu)線對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)具有(you)(you)很(hen)高的靈活性，它(ta)能夠滿足現(xian)場中所有(you)(you)環境使(shi)用(yong)需求(qiu)并能隨(sui)時(shi)(shi)切換（如在野(ye)外(wai)(wai)、戶(hu)(hu)外(wai)(wai)電話等),用(yong)戶(hu)(hu)可以在任(ren)何地(di)點使(shi)用(yong)、隨(sui)時(shi)(shi)、隨(sui)地(di)進行通(tong)訊(xun)。使(shi)用(yong)方便、節(jie)(jie)省成本(ben)、節(jie)(jie)約費用(yong)。下(xia)面我們來了解一下(xia)無(wu)線對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)(tong)它(ta)主要(yao)是什(shen)么(me)優(you)點？

1.性能穩定，可靠性高

在相同無(wu)(wu)(wu)線(xian)(xian)(xian)傳輸距離下，無(wu)(wu)(wu)線(xian)(xian)(xian)傳輸信(xin)號(hao)更穩定(ding)由(you)于使用(yong)(yong)了功(gong)率(lv)放大器來對無(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)進行(xing)壓縮和放大，使無(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)更加穩定(ding)可(ke)靠。無(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)在弱電(dian)磁(ci)環(huan)境(jing)下也(ye)能(neng)(neng)保(bao)持較好(hao)的(de)性能(neng)(neng)。無(wu)(wu)(wu)線(xian)(xian)(xian)對講系統(tong)具有(you)(you)(you)發(fa)(fa)(fa)(fa)(fa)射功(gong)率(lv)小(xiao)、抗(kang)(kang)千(qian)擾(rao)能(neng)(neng)力(li)強(與有(you)(you)(you)線(xian)(xian)(xian)對講系統(tong)比(bi)較)和抗(kang)(kang)電(dian)磁(ci)干擾(rao)能(neng)(neng)力(li)強(與有(you)(you)(you)線(xian)(xian)(xian)對講系統(tong)比(bi)較)的(de)特點。無(wu)(wu)(wu)線(xian)(xian)(xian)對講系統(tong)發(fa)(fa)(fa)(fa)(fa)射信(xin)號(hao)在發(fa)(fa)(fa)(fa)(fa)射前和發(fa)(fa)(fa)(fa)(fa)射后均能(neng)(neng)保(bao)持良(liang)好(hao)的(de)性能(neng)(neng)，使用(yong)(yong)過程(cheng)中，發(fa)(fa)(fa)(fa)(fa)射信(xin)號(hao)與接(jie)收信(xin)號(hao)完全(quan)不受任何千(qian)擾(rao)，可(ke)保(bao)持很好(hao)的(de)穩定(ding)性，具有(you)(you)(you)良(liang)好(hao)的(de)抗(kang)(kang)千(qian)擾(rao)性和抗(kang)(kang)低頻干擾(rao)能(neng)(neng)力(li)，即(ji)使在惡劣的(de)環(huan)境(jing)下也(ye)能(neng)(neng)保(bao)持較好(hao)的(de)性能(neng)(neng)。因此無(wu)(wu)(wu)線(xian)(xian)(xian)系統(tong)有(you)(you)(you)較高的(de)可(ke)靠性。

2.功耗(hao)小、不(bu)受(shou)天氣、濕度的影響

無(wu)線(xian)對講(jiang)系統(tong)在不同的(de)(de)環(huan)境(jing)中，無(wu)線(xian)通信設(she)備和有(you)線(xian)通信設(she)備一(yi)樣都(dou)要進行電(dian)能的(de)(de)消耗(hao)(hao)。當環(huan)境(jing)溫度在-40°C以下(xia)時，無(wu)線(xian)通信設(she)備需(xu)要每(mei)天(tian)工(gong)(gong)作(zuo)8小(xiao)(xiao)時左(zuo)(zuo)(zuo)右;當環(huan)境(jing)溫度為(wei)-20°C時，每(mei)天(tian)工(gong)(gong)作(zuo)8小(xiao)(xiao)時左(zuo)(zuo)(zuo)右;當環(huan)境(jing)溫度為(wei)-30°C時，每(mei)天(tian)工(gong)(gong)作(zuo)4小(xiao)(xiao)時左(zuo)(zuo)(zuo)右。目前市場上常見(jian)的(de)(de)無(wu)線(xian)對講(jiang)系統(tong)有(you)兩(liang)種電(dian)源(yuan)輸入(ru)方式，一(yi)種是電(dian)源(yuan)輸入(ru)，另一(yi)種是電(dian)源(yuan)輸出。從這兩(liang)種方式對系統(tong)的(de)(de)功(gong)耗(hao)(hao)來看，電(dian)源(yuan)輸入(ru)方式的(de)(de)功(gong)耗(hao)(hao)更大一(yi)些(xie)，但(dan)是功(gong)耗(hao)(hao)很小(xiao)(xiao)。并且設(she)備的(de)(de)工(gong)(gong)作(zuo)環(huan)境(jing)不同，對電(dian)池的(de)(de)需(xu)求(qiu)量(liang)也不同，所(suo)以功(gong)耗(hao)(hao)也不同。

3信號不受干擾

在一(yi)(yi)(yi)些有(you)干(gan)(gan)擾(rao)(rao)(rao)的(de)(de)地(di)方，例如(ru)野(ye)外(wai)、機場、工廠(chang)等，一(yi)(yi)(yi)般(ban)采用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)方式。分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)方式的(de)(de)抗(kang)干(gan)(gan)擾(rao)(rao)(rao)能(neng)力不強(qiang)，其抗(kang)干(gan)(gan)擾(rao)(rao)(rao)能(neng)力主要取(qu)決于(yu)(yu)射(she)(she)(she)頻(pin)(pin)(pin)功(gong)率(lv)(lv)的(de)(de)大(da)小。分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術的(de)(de)功(gong)率(lv)(lv)一(yi)(yi)(yi)般(ban)是(shi)50dB在50dB左右時(shi)，其抗(kang)干(gan)(gan)擾(rao)(rao)(rao)能(neng)力強(qiang)。但(dan)由于(yu)(yu)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)的(de)(de)干(gan)(gan)擾(rao)(rao)(rao)與(yu)(yu)噪(zao)聲(主要是(shi)周邊噪(zao)聲)具有(you)很強(qiang)的(de)(de)互通性(xing)，當分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)發(fa)射(she)(she)(she)的(de)(de)信號(hao)(hao)(hao)(hao)超過50dB時(shi)，其抗(kang)千擾(rao)(rao)(rao)能(neng)力就會減(jian)弱。另外(wai)，在一(yi)(yi)(yi)些有(you)噪(zao)音的(de)(de)環境(jing)中使(shi)(shi)用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術，會使(shi)(shi)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)信號(hao)(hao)(hao)(hao)無(wu)(wu)法(fa)到達發(fa)射(she)(she)(she)端的(de)(de)接(jie)收(shou)(shou)機或者造(zao)(zao)成發(fa)射(she)(she)(she)端信號(hao)(hao)(hao)(hao)與(yu)(yu)接(jie)收(shou)(shou)端信號(hao)(hao)(hao)(hao)的(de)(de)糟合而(er)(er)造(zao)(zao)成分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)或干(gan)(gan)擾(rao)(rao)(rao)(例如(ru)在使(shi)(shi)用(yong)(yong)(yong)室外(wai)電話時(shi)) 。而(er)(er)采用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術的(de)(de)無(wu)(wu)線(xian)對講(jiang)系(xi)統(tong)(tong)由于(yu)(yu)發(fa)射(she)(she)(she)功(gong)率(lv)(lv)小，分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)后的(de)(de)信號(hao)(hao)(hao)(hao)強(qiang)度(du)比(bi)有(you)線(xian)對講(jiang)系(xi)統(tong)(tong)高很多(duo)(在實際(ji)使(shi)(shi)用(yong)(yong)(yong)中分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)設備(bei)一(yi)(yi)(yi)般(ban)可以(yi)將系(xi)統(tong)(tong)信號(hao)(hao)(hao)(hao)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)到50dB以(yi)上),信號(hao)(hao)(hao)(hao)不受干(gan)(gan)擾(rao)(rao)(rao)。如(ru)果(guo)采用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術，需(xu)要在較大(da)的(de)(de)回波功(gong)率(lv)(lv)下才能(neng)實現信號(hao)(hao)(hao)(hao)的(de)(de)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)工作(如(ru)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)器發(fa)射(she)(she)(she)信號(hao)(hao)(hao)(hao)與(yu)(yu)接(jie)收(shou)(shou)信號(hao)(hao)(hao)(hao)重疊時(shi)產生(sheng)的(de)(de)千擾(rao)(rao)(rao))和(he)發(fa)送信號(hao)(hao)(hao)(hao)強(qiang)度(du)降低(同(tong)頻(pin)(pin)(pin)帶內的(de)(de)兩(liang)只(zhi)天(tian)線(xian)對同(tong)一(yi)(yi)(yi)信道傳(chuan)輸的(de)(de)信號(hao)(hao)(hao)(hao)強(qiang)度(du)基(ji)本一(yi)(yi)(yi)致);如(ru)果(guo)采用(yong)(yong)(yong)混響技(ji)術，則可以(yi)實現對無(wu)(wu)線(xian)信號(hao)(hao)(hao)(hao)干(gan)(gan)擾(rao)(rao)(rao)的(de)(de)抑制或降低。