由于在(zai)(zai)戶外(wai)、室內等區域，無線(xian)(xian)(xian)對(dui)講系(xi)統(tong)(tong)(tong)的(de)(de)(de)信(xin)號(hao)強度(du)較弱，而(er)且采(cai)用(yong)(yong)頻率調制技術（如(ru) MHZ、 NMR、 BSI等）產生(sheng)的(de)(de)(de)信(xin)號(hao)傳(chuan)輸(shu)時(shi)延大，傳(chuan)輸(shu)距(ju)(ju)離遠(yuan)。因此有線(xian)(xian)(xian)對(dui)講系(xi)統(tong)(tong)(tong)不(bu)適合(he)在(zai)(zai)戶外(wai)環(huan)境使(shi)用(yong)(yong)，特別(bie)是(shi)在(zai)(zai)冬天及低風(feng)速季節使(shi)用(yong)(yong)。雖然無線(xian)(xian)(xian)對(dui)講系(xi)統(tong)(tong)(tong)也有著不(bu)錯的(de)(de)(de)效(xiao)果(guo)。但由于系(xi)統(tong)(tong)(tong)工作時(shi)會有一定(ding)的(de)(de)(de)干(gan)擾，使(shi)對(dui)講效(xiao)果(guo)下降，另外(wai)在(zai)(zai)信(xin)號(hao)較弱時(shi)對(dui)用(yong)(yong)戶語(yu)音產生(sheng)了影響。特別(bie)是(shi)在(zai)(zai)人員復雜、通信(xin)距(ju)(ju)離較短或(huo)需要(yao)較長時(shi)間使(shi)用(yong)(yong)時(shi)。因此，更需要(yao)有一個可靠(kao)的(de)(de)(de)無線(xian)(xian)(xian)對(dui)講系(xi)統(tong)(tong)(tong)提供(gong)與有線(xian)(xian)(xian)對(dui)講系(xi)統(tong)(tong)(tong)一樣的(de)(de)(de)語(yu)音信(xin)息與控制。無線(xian)(xian)(xian)對(dui)講系(xi)統(tong)(tong)(tong)具有很(hen)高的(de)(de)(de)靈活(huo)性，它能夠滿(man)足現場(chang)中所有環(huan)境使(shi)用(yong)(yong)需求并能隨時(shi)切換（如(ru)在(zai)(zai)野外(wai)、戶外(wai)電話等),用(yong)(yong)戶可以在(zai)(zai)任何地點(dian)使(shi)用(yong)(yong)、隨時(shi)、隨地進行(xing)通訊。使(shi)用(yong)(yong)方(fang)便、節省成本(ben)、節約費用(yong)(yong)。下面我們來(lai)了解一下無線(xian)(xian)(xian)對(dui)講系(xi)統(tong)(tong)(tong)它主要(yao)是(shi)什么優點(dian)？

1.性能穩定(ding)，可靠性高(gao)

在相同(tong)無(wu)(wu)(wu)線(xian)(xian)傳輸距(ju)離(li)下，無(wu)(wu)(wu)線(xian)(xian)傳輸信(xin)(xin)(xin)號(hao)(hao)更穩定(ding)由(you)于使(shi)用(yong)了功率(lv)放大器來對(dui)(dui)無(wu)(wu)(wu)線(xian)(xian)信(xin)(xin)(xin)號(hao)(hao)進行壓縮和放大，使(shi)無(wu)(wu)(wu)線(xian)(xian)信(xin)(xin)(xin)號(hao)(hao)更加穩定(ding)可(ke)靠(kao)。無(wu)(wu)(wu)線(xian)(xian)信(xin)(xin)(xin)號(hao)(hao)在弱電(dian)磁環境下也能(neng)(neng)(neng)(neng)保持(chi)較(jiao)好的(de)(de)性能(neng)(neng)(neng)(neng)。無(wu)(wu)(wu)線(xian)(xian)對(dui)(dui)講(jiang)系(xi)統具(ju)有(you)發(fa)射(she)功率(lv)小、抗(kang)千擾(rao)能(neng)(neng)(neng)(neng)力強(qiang)(與(yu)(yu)有(you)線(xian)(xian)對(dui)(dui)講(jiang)系(xi)統比較(jiao))和抗(kang)電(dian)磁干擾(rao)能(neng)(neng)(neng)(neng)力強(qiang)(與(yu)(yu)有(you)線(xian)(xian)對(dui)(dui)講(jiang)系(xi)統比較(jiao))的(de)(de)特點(dian)。無(wu)(wu)(wu)線(xian)(xian)對(dui)(dui)講(jiang)系(xi)統發(fa)射(she)信(xin)(xin)(xin)號(hao)(hao)在發(fa)射(she)前(qian)和發(fa)射(she)后(hou)均能(neng)(neng)(neng)(neng)保持(chi)良(liang)好的(de)(de)性能(neng)(neng)(neng)(neng)，使(shi)用(yong)過程中，發(fa)射(she)信(xin)(xin)(xin)號(hao)(hao)與(yu)(yu)接收信(xin)(xin)(xin)號(hao)(hao)完(wan)全不受(shou)任何千擾(rao)，可(ke)保持(chi)很好的(de)(de)穩定(ding)性，具(ju)有(you)良(liang)好的(de)(de)抗(kang)千擾(rao)性和抗(kang)低頻干擾(rao)能(neng)(neng)(neng)(neng)力，即使(shi)在惡(e)劣的(de)(de)環境下也能(neng)(neng)(neng)(neng)保持(chi)較(jiao)好的(de)(de)性能(neng)(neng)(neng)(neng)。因(yin)此無(wu)(wu)(wu)線(xian)(xian)系(xi)統有(you)較(jiao)高(gao)的(de)(de)可(ke)靠(kao)性。

2.功(gong)耗小、不受天氣、濕度的影響

無(wu)線(xian)對(dui)講系統在不同的環(huan)(huan)境(jing)中，無(wu)線(xian)通信(xin)設備(bei)和有線(xian)通信(xin)設備(bei)一(yi)(yi)樣都要(yao)進行電(dian)(dian)能的消耗(hao)。當(dang)環(huan)(huan)境(jing)溫(wen)度在-40°C以下(xia)時(shi)(shi)，無(wu)線(xian)通信(xin)設備(bei)需要(yao)每(mei)天(tian)工(gong)作8小時(shi)(shi)左(zuo)右;當(dang)環(huan)(huan)境(jing)溫(wen)度為-20°C時(shi)(shi)，每(mei)天(tian)工(gong)作8小時(shi)(shi)左(zuo)右;當(dang)環(huan)(huan)境(jing)溫(wen)度為-30°C時(shi)(shi)，每(mei)天(tian)工(gong)作4小時(shi)(shi)左(zuo)右。目前市(shi)場上(shang)常見的無(wu)線(xian)對(dui)講系統有兩種電(dian)(dian)源輸入方式(shi)，一(yi)(yi)種是(shi)電(dian)(dian)源輸入，另一(yi)(yi)種是(shi)電(dian)(dian)源輸出。從(cong)這兩種方式(shi)對(dui)系統的功(gong)耗(hao)來看，電(dian)(dian)源輸入方式(shi)的功(gong)耗(hao)更大一(yi)(yi)些，但(dan)是(shi)功(gong)耗(hao)很小。并且設備(bei)的工(gong)作環(huan)(huan)境(jing)不同，對(dui)電(dian)(dian)池的需求量也不同，所以功(gong)耗(hao)也不同。

3信號不受干擾

在(zai)一(yi)(yi)(yi)些有干(gan)擾(rao)(rao)(rao)的(de)(de)(de)(de)地方(fang)，例(li)(li)如野外、機場(chang)、工(gong)廠(chang)等，一(yi)(yi)(yi)般(ban)采(cai)(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)方(fang)式(shi)。分(fen)(fen)(fen)(fen)頻(pin)(pin)方(fang)式(shi)的(de)(de)(de)(de)抗干(gan)擾(rao)(rao)(rao)能力(li)(li)不(bu)強(qiang)(qiang)(qiang)，其(qi)抗干(gan)擾(rao)(rao)(rao)能力(li)(li)主要取決于射(she)(she)頻(pin)(pin)功率(lv)(lv)的(de)(de)(de)(de)大小。分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術的(de)(de)(de)(de)功率(lv)(lv)一(yi)(yi)(yi)般(ban)是(shi)50dB在(zai)50dB左右時，其(qi)抗干(gan)擾(rao)(rao)(rao)能力(li)(li)強(qiang)(qiang)(qiang)。但由于分(fen)(fen)(fen)(fen)頻(pin)(pin)的(de)(de)(de)(de)干(gan)擾(rao)(rao)(rao)與(yu)噪(zao)聲(主要是(shi)周(zhou)邊(bian)噪(zao)聲)具有很強(qiang)(qiang)(qiang)的(de)(de)(de)(de)互通性，當分(fen)(fen)(fen)(fen)頻(pin)(pin)發(fa)(fa)射(she)(she)的(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)超過50dB時，其(qi)抗千(qian)擾(rao)(rao)(rao)能力(li)(li)就會減弱。另外，在(zai)一(yi)(yi)(yi)些有噪(zao)音的(de)(de)(de)(de)環境中使用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術，會使分(fen)(fen)(fen)(fen)頻(pin)(pin)信(xin)(xin)號(hao)(hao)無(wu)(wu)法到(dao)達發(fa)(fa)射(she)(she)端(duan)的(de)(de)(de)(de)接(jie)收機或(huo)者造成發(fa)(fa)射(she)(she)端(duan)信(xin)(xin)號(hao)(hao)與(yu)接(jie)收端(duan)信(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)糟合(he)而(er)造成分(fen)(fen)(fen)(fen)頻(pin)(pin)或(huo)干(gan)擾(rao)(rao)(rao)(例(li)(li)如在(zai)使用(yong)(yong)室外電話時) 。而(er)采(cai)(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術的(de)(de)(de)(de)無(wu)(wu)線(xian)(xian)對(dui)講系統由于發(fa)(fa)射(she)(she)功率(lv)(lv)小，分(fen)(fen)(fen)(fen)頻(pin)(pin)后(hou)的(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)強(qiang)(qiang)(qiang)度(du)(du)比(bi)有線(xian)(xian)對(dui)講系統高(gao)很多(在(zai)實際使用(yong)(yong)中分(fen)(fen)(fen)(fen)頻(pin)(pin)設備一(yi)(yi)(yi)般(ban)可以將系統信(xin)(xin)號(hao)(hao)分(fen)(fen)(fen)(fen)頻(pin)(pin)到(dao)50dB以上(shang)),信(xin)(xin)號(hao)(hao)不(bu)受干(gan)擾(rao)(rao)(rao)。如果(guo)(guo)采(cai)(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術，需要在(zai)較大的(de)(de)(de)(de)回波功率(lv)(lv)下(xia)才能實現(xian)信(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)分(fen)(fen)(fen)(fen)頻(pin)(pin)工(gong)作(如分(fen)(fen)(fen)(fen)頻(pin)(pin)器(qi)發(fa)(fa)射(she)(she)信(xin)(xin)號(hao)(hao)與(yu)接(jie)收信(xin)(xin)號(hao)(hao)重(zhong)疊時產(chan)生的(de)(de)(de)(de)千(qian)擾(rao)(rao)(rao))和發(fa)(fa)送信(xin)(xin)號(hao)(hao)強(qiang)(qiang)(qiang)度(du)(du)降低(同(tong)頻(pin)(pin)帶內的(de)(de)(de)(de)兩只(zhi)天線(xian)(xian)對(dui)同(tong)一(yi)(yi)(yi)信(xin)(xin)道傳輸的(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)強(qiang)(qiang)(qiang)度(du)(du)基本一(yi)(yi)(yi)致);如果(guo)(guo)采(cai)(cai)用(yong)(yong)混響技(ji)術，則可以實現(xian)對(dui)無(wu)(wu)線(xian)(xian)信(xin)(xin)號(hao)(hao)干(gan)擾(rao)(rao)(rao)的(de)(de)(de)(de)抑制或(huo)降低。