由于(yu)(yu)在(zai)(zai)戶外(wai)、室(shi)內等(deng)區域(yu)，無線(xian)(xian)(xian)對(dui)講系(xi)(xi)(xi)統的(de)(de)(de)信號(hao)(hao)強度較(jiao)弱，而且(qie)采(cai)用頻率調制(zhi)技術（如(ru) MHZ、 NMR、 BSI等(deng)）產生的(de)(de)(de)信號(hao)(hao)傳輸時(shi)(shi)延大，傳輸距離遠。因(yin)此有(you)線(xian)(xian)(xian)對(dui)講系(xi)(xi)(xi)統不(bu)適合(he)在(zai)(zai)戶外(wai)環境使(shi)(shi)(shi)用，特別是(shi)在(zai)(zai)冬天及(ji)低(di)風速季節使(shi)(shi)(shi)用。雖(sui)然無線(xian)(xian)(xian)對(dui)講系(xi)(xi)(xi)統也有(you)著不(bu)錯的(de)(de)(de)效果。但(dan)由于(yu)(yu)系(xi)(xi)(xi)統工作時(shi)(shi)會有(you)一定(ding)的(de)(de)(de)干擾，使(shi)(shi)(shi)對(dui)講效果下(xia)(xia)降，另外(wai)在(zai)(zai)信號(hao)(hao)較(jiao)弱時(shi)(shi)對(dui)用戶語音產生了影(ying)響(xiang)。特別是(shi)在(zai)(zai)人員復(fu)雜、通信距離較(jiao)短或需(xu)要較(jiao)長(chang)時(shi)(shi)間使(shi)(shi)(shi)用時(shi)(shi)。因(yin)此，更需(xu)要有(you)一個可(ke)靠的(de)(de)(de)無線(xian)(xian)(xian)對(dui)講系(xi)(xi)(xi)統提供與(yu)有(you)線(xian)(xian)(xian)對(dui)講系(xi)(xi)(xi)統一樣的(de)(de)(de)語音信息與(yu)控制(zhi)。無線(xian)(xian)(xian)對(dui)講系(xi)(xi)(xi)統具有(you)很高的(de)(de)(de)靈活(huo)性，它(ta)能夠滿足現場中所(suo)有(you)環境使(shi)(shi)(shi)用需(xu)求并能隨(sui)時(shi)(shi)切換（如(ru)在(zai)(zai)野外(wai)、戶外(wai)電(dian)話等(deng)),用戶可(ke)以在(zai)(zai)任何(he)地點使(shi)(shi)(shi)用、隨(sui)時(shi)(shi)、隨(sui)地進行通訊。使(shi)(shi)(shi)用方便、節省成本(ben)、節約費(fei)用。下(xia)(xia)面我們來了解一下(xia)(xia)無線(xian)(xian)(xian)對(dui)講系(xi)(xi)(xi)統它(ta)主要是(shi)什么優點？

1.性能穩(wen)定(ding)，可(ke)靠性高

在相同無(wu)(wu)線(xian)(xian)(xian)傳輸距(ju)離下，無(wu)(wu)線(xian)(xian)(xian)傳輸信(xin)(xin)(xin)號更穩(wen)(wen)定(ding)由(you)于(yu)使(shi)用了功(gong)率放(fang)大(da)器來(lai)對(dui)(dui)無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)(xin)號進行壓(ya)縮和放(fang)大(da)，使(shi)無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)(xin)號更加穩(wen)(wen)定(ding)可(ke)靠。無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)(xin)號在弱電(dian)磁(ci)環(huan)(huan)境(jing)(jing)下也(ye)能(neng)保(bao)(bao)持(chi)較(jiao)好的(de)性(xing)能(neng)。無(wu)(wu)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)具有(you)發射(she)(she)功(gong)率小、抗(kang)(kang)千(qian)(qian)擾(rao)能(neng)力(li)強(與有(you)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)比較(jiao))和抗(kang)(kang)電(dian)磁(ci)干(gan)擾(rao)能(neng)力(li)強(與有(you)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)比較(jiao))的(de)特點。無(wu)(wu)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)發射(she)(she)信(xin)(xin)(xin)號在發射(she)(she)前和發射(she)(she)后均能(neng)保(bao)(bao)持(chi)良好的(de)性(xing)能(neng)，使(shi)用過程中，發射(she)(she)信(xin)(xin)(xin)號與接收信(xin)(xin)(xin)號完全不受任(ren)何千(qian)(qian)擾(rao)，可(ke)保(bao)(bao)持(chi)很好的(de)穩(wen)(wen)定(ding)性(xing)，具有(you)良好的(de)抗(kang)(kang)千(qian)(qian)擾(rao)性(xing)和抗(kang)(kang)低頻干(gan)擾(rao)能(neng)力(li)，即使(shi)在惡劣(lie)的(de)環(huan)(huan)境(jing)(jing)下也(ye)能(neng)保(bao)(bao)持(chi)較(jiao)好的(de)性(xing)能(neng)。因此無(wu)(wu)線(xian)(xian)(xian)系(xi)統(tong)有(you)較(jiao)高的(de)可(ke)靠性(xing)。

2.功(gong)耗小、不(bu)受天氣、濕(shi)度的(de)影響

無(wu)線(xian)對講系統(tong)在不(bu)同(tong)(tong)的(de)環(huan)(huan)境(jing)中，無(wu)線(xian)通信設備(bei)(bei)(bei)和有(you)線(xian)通信設備(bei)(bei)(bei)一(yi)(yi)(yi)樣都要進行電能的(de)消(xiao)耗。當(dang)環(huan)(huan)境(jing)溫度在-40°C以(yi)下時(shi)(shi)，無(wu)線(xian)通信設備(bei)(bei)(bei)需要每(mei)天工(gong)(gong)作(zuo)(zuo)8小(xiao)時(shi)(shi)左右(you);當(dang)環(huan)(huan)境(jing)溫度為-20°C時(shi)(shi)，每(mei)天工(gong)(gong)作(zuo)(zuo)8小(xiao)時(shi)(shi)左右(you);當(dang)環(huan)(huan)境(jing)溫度為-30°C時(shi)(shi)，每(mei)天工(gong)(gong)作(zuo)(zuo)4小(xiao)時(shi)(shi)左右(you)。目前(qian)市場上常見的(de)無(wu)線(xian)對講系統(tong)有(you)兩種(zhong)(zhong)電源(yuan)輸(shu)入方(fang)式(shi)，一(yi)(yi)(yi)種(zhong)(zhong)是電源(yuan)輸(shu)入，另一(yi)(yi)(yi)種(zhong)(zhong)是電源(yuan)輸(shu)出。從這(zhe)兩種(zhong)(zhong)方(fang)式(shi)對系統(tong)的(de)功(gong)(gong)耗來看，電源(yuan)輸(shu)入方(fang)式(shi)的(de)功(gong)(gong)耗更大一(yi)(yi)(yi)些(xie)，但是功(gong)(gong)耗很小(xiao)。并且設備(bei)(bei)(bei)的(de)工(gong)(gong)作(zuo)(zuo)環(huan)(huan)境(jing)不(bu)同(tong)(tong)，對電池(chi)的(de)需求量也不(bu)同(tong)(tong)，所以(yi)功(gong)(gong)耗也不(bu)同(tong)(tong)。

3信號不受干擾

在(zai)(zai)一(yi)(yi)些有(you)干(gan)擾(rao)(rao)(rao)的(de)(de)(de)(de)地方(fang)，例如(ru)野(ye)外、機場、工(gong)(gong)廠等，一(yi)(yi)般采(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(kang)干(gan)擾(rao)(rao)(rao)能(neng)(neng)力不強(qiang)，其抗(kang)干(gan)擾(rao)(rao)(rao)能(neng)(neng)力主要(yao)取決于射頻(pin)(pin)功(gong)(gong)率(lv)的(de)(de)(de)(de)大小。分(fen)(fen)(fen)(fen)頻(pin)(pin)技術(shu)(shu)的(de)(de)(de)(de)功(gong)(gong)率(lv)一(yi)(yi)般是50dB在(zai)(zai)50dB左右(you)時(shi)，其抗(kang)干(gan)擾(rao)(rao)(rao)能(neng)(neng)力強(qiang)。但由(you)于分(fen)(fen)(fen)(fen)頻(pin)(pin)的(de)(de)(de)(de)干(gan)擾(rao)(rao)(rao)與噪聲(主要(yao)是周邊噪聲)具(ju)有(you)很(hen)強(qiang)的(de)(de)(de)(de)互通性(xing)，當分(fen)(fen)(fen)(fen)頻(pin)(pin)發(fa)射的(de)(de)(de)(de)信號(hao)(hao)(hao)超(chao)過50dB時(shi)，其抗(kang)千(qian)擾(rao)(rao)(rao)能(neng)(neng)力就會減(jian)弱。另外，在(zai)(zai)一(yi)(yi)些有(you)噪音的(de)(de)(de)(de)環(huan)境(jing)中使用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技術(shu)(shu)，會使分(fen)(fen)(fen)(fen)頻(pin)(pin)信號(hao)(hao)(hao)無法(fa)到達發(fa)射端(duan)(duan)的(de)(de)(de)(de)接(jie)收(shou)機或者造成發(fa)射端(duan)(duan)信號(hao)(hao)(hao)與接(jie)收(shou)端(duan)(duan)信號(hao)(hao)(hao)的(de)(de)(de)(de)糟(zao)合而(er)造成分(fen)(fen)(fen)(fen)頻(pin)(pin)或干(gan)擾(rao)(rao)(rao)(例如(ru)在(zai)(zai)使用(yong)(yong)室外電(dian)話時(shi)) 。而(er)采(cai)(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技術(shu)(shu)的(de)(de)(de)(de)無線對講(jiang)系統由(you)于發(fa)射功(gong)(gong)率(lv)小，分(fen)(fen)(fen)(fen)頻(pin)(pin)后的(de)(de)(de)(de)信號(hao)(hao)(hao)強(qiang)度(du)比有(you)線對講(jiang)系統高很(hen)多(在(zai)(zai)實(shi)(shi)際(ji)使用(yong)(yong)中分(fen)(fen)(fen)(fen)頻(pin)(pin)設備(bei)一(yi)(yi)般可(ke)以(yi)將系統信號(hao)(hao)(hao)分(fen)(fen)(fen)(fen)頻(pin)(pin)到50dB以(yi)上),信號(hao)(hao)(hao)不受(shou)干(gan)擾(rao)(rao)(rao)。如(ru)果采(cai)(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技術(shu)(shu)，需要(yao)在(zai)(zai)較大的(de)(de)(de)(de)回波功(gong)(gong)率(lv)下(xia)才能(neng)(neng)實(shi)(shi)現(xian)信號(hao)(hao)(hao)的(de)(de)(de)(de)分(fen)(fen)(fen)(fen)頻(pin)(pin)工(gong)(gong)作(如(ru)分(fen)(fen)(fen)(fen)頻(pin)(pin)器發(fa)射信號(hao)(hao)(hao)與接(jie)收(shou)信號(hao)(hao)(hao)重(zhong)疊(die)時(shi)產生的(de)(de)(de)(de)千(qian)擾(rao)(rao)(rao))和發(fa)送信號(hao)(hao)(hao)強(qiang)度(du)降(jiang)低(同頻(pin)(pin)帶內的(de)(de)(de)(de)兩只天線對同一(yi)(yi)信道傳(chuan)輸的(de)(de)(de)(de)信號(hao)(hao)(hao)強(qiang)度(du)基本一(yi)(yi)致);如(ru)果采(cai)(cai)用(yong)(yong)混響(xiang)技術(shu)(shu)，則可(ke)以(yi)實(shi)(shi)現(xian)對無線信號(hao)(hao)(hao)干(gan)擾(rao)(rao)(rao)的(de)(de)(de)(de)抑制或降(jiang)低。