由于(yu)在(zai)戶(hu)(hu)外(wai)(wai)、室內等(deng)區域，無線對講(jiang)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)的(de)信號(hao)強度較(jiao)弱，而且采用(yong)(yong)(yong)頻率(lv)調制技術（如(ru)(ru) MHZ、 NMR、 BSI等(deng)）產(chan)生的(de)信號(hao)傳輸時(shi)(shi)延大，傳輸距離(li)遠(yuan)。因此(ci)有(you)線對講(jiang)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)不(bu)適合在(zai)戶(hu)(hu)外(wai)(wai)環境使(shi)(shi)用(yong)(yong)(yong)，特(te)別是(shi)(shi)在(zai)冬天及低風速(su)季(ji)節(jie)使(shi)(shi)用(yong)(yong)(yong)。雖然無線對講(jiang)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)也(ye)有(you)著不(bu)錯(cuo)的(de)效(xiao)(xiao)果(guo)。但由于(yu)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)工作時(shi)(shi)會有(you)一(yi)定的(de)干擾，使(shi)(shi)對講(jiang)效(xiao)(xiao)果(guo)下降，另外(wai)(wai)在(zai)信號(hao)較(jiao)弱時(shi)(shi)對用(yong)(yong)(yong)戶(hu)(hu)語音產(chan)生了影響。特(te)別是(shi)(shi)在(zai)人員復雜、通(tong)信距離(li)較(jiao)短或需要較(jiao)長時(shi)(shi)間使(shi)(shi)用(yong)(yong)(yong)時(shi)(shi)。因此(ci)，更需要有(you)一(yi)個(ge)可靠(kao)的(de)無線對講(jiang)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)提供與有(you)線對講(jiang)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)一(yi)樣的(de)語音信息與控制。無線對講(jiang)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)具有(you)很高(gao)的(de)靈活性(xing)，它能(neng)夠(gou)滿足現場中所有(you)環境使(shi)(shi)用(yong)(yong)(yong)需求并能(neng)隨時(shi)(shi)切換（如(ru)(ru)在(zai)野外(wai)(wai)、戶(hu)(hu)外(wai)(wai)電話等(deng)),用(yong)(yong)(yong)戶(hu)(hu)可以在(zai)任何(he)地點使(shi)(shi)用(yong)(yong)(yong)、隨時(shi)(shi)、隨地進(jin)行(xing)通(tong)訊。使(shi)(shi)用(yong)(yong)(yong)方(fang)便、節(jie)省成本、節(jie)約費用(yong)(yong)(yong)。下面我們來了解(jie)一(yi)下無線對講(jiang)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)它主(zhu)要是(shi)(shi)什么優點？

1.性(xing)能穩定(ding)，可靠(kao)性(xing)高

在(zai)相同無(wu)線(xian)(xian)(xian)傳(chuan)輸距離下，無(wu)線(xian)(xian)(xian)傳(chuan)輸信(xin)(xin)(xin)號更穩(wen)(wen)定(ding)由于(yu)使(shi)用了功率(lv)放大器來對無(wu)線(xian)(xian)(xian)信(xin)(xin)(xin)號進(jin)行壓縮和放大，使(shi)無(wu)線(xian)(xian)(xian)信(xin)(xin)(xin)號更加穩(wen)(wen)定(ding)可靠(kao)。無(wu)線(xian)(xian)(xian)信(xin)(xin)(xin)號在(zai)弱電磁(ci)環境下也(ye)能(neng)(neng)保(bao)(bao)持(chi)較(jiao)好(hao)的性(xing)能(neng)(neng)。無(wu)線(xian)(xian)(xian)對講(jiang)(jiang)(jiang)系(xi)統(tong)具(ju)有發射功率(lv)小、抗(kang)(kang)千(qian)(qian)擾(rao)能(neng)(neng)力強(qiang)(與有線(xian)(xian)(xian)對講(jiang)(jiang)(jiang)系(xi)統(tong)比較(jiao))和抗(kang)(kang)電磁(ci)干(gan)擾(rao)能(neng)(neng)力強(qiang)(與有線(xian)(xian)(xian)對講(jiang)(jiang)(jiang)系(xi)統(tong)比較(jiao))的特(te)點(dian)。無(wu)線(xian)(xian)(xian)對講(jiang)(jiang)(jiang)系(xi)統(tong)發射信(xin)(xin)(xin)號在(zai)發射前(qian)和發射后(hou)均能(neng)(neng)保(bao)(bao)持(chi)良好(hao)的性(xing)能(neng)(neng)，使(shi)用過程中，發射信(xin)(xin)(xin)號與接(jie)收信(xin)(xin)(xin)號完(wan)全(quan)不受任何千(qian)(qian)擾(rao)，可保(bao)(bao)持(chi)很(hen)好(hao)的穩(wen)(wen)定(ding)性(xing)，具(ju)有良好(hao)的抗(kang)(kang)千(qian)(qian)擾(rao)性(xing)和抗(kang)(kang)低頻(pin)干(gan)擾(rao)能(neng)(neng)力，即使(shi)在(zai)惡劣的環境下也(ye)能(neng)(neng)保(bao)(bao)持(chi)較(jiao)好(hao)的性(xing)能(neng)(neng)。因此無(wu)線(xian)(xian)(xian)系(xi)統(tong)有較(jiao)高的可靠(kao)性(xing)。

2.功耗(hao)小、不受(shou)天氣、濕度的(de)影(ying)響

無(wu)線(xian)對(dui)(dui)講(jiang)系(xi)統在(zai)不(bu)(bu)同(tong)的(de)(de)(de)環(huan)境中，無(wu)線(xian)通(tong)信(xin)(xin)設備(bei)和有(you)線(xian)通(tong)信(xin)(xin)設備(bei)一樣都要進(jin)行電(dian)能(neng)的(de)(de)(de)消耗。當環(huan)境溫度在(zai)-40°C以下時(shi)(shi)(shi)，無(wu)線(xian)通(tong)信(xin)(xin)設備(bei)需(xu)要每(mei)天(tian)工(gong)(gong)作8小(xiao)時(shi)(shi)(shi)左右;當環(huan)境溫度為(wei)-20°C時(shi)(shi)(shi)，每(mei)天(tian)工(gong)(gong)作8小(xiao)時(shi)(shi)(shi)左右;當環(huan)境溫度為(wei)-30°C時(shi)(shi)(shi)，每(mei)天(tian)工(gong)(gong)作4小(xiao)時(shi)(shi)(shi)左右。目前市場上常見的(de)(de)(de)無(wu)線(xian)對(dui)(dui)講(jiang)系(xi)統有(you)兩種電(dian)源輸入(ru)方式(shi)(shi)，一種是(shi)電(dian)源輸入(ru)，另一種是(shi)電(dian)源輸出。從這兩種方式(shi)(shi)對(dui)(dui)系(xi)統的(de)(de)(de)功(gong)耗來看(kan)，電(dian)源輸入(ru)方式(shi)(shi)的(de)(de)(de)功(gong)耗更大一些，但是(shi)功(gong)耗很(hen)小(xiao)。并(bing)且設備(bei)的(de)(de)(de)工(gong)(gong)作環(huan)境不(bu)(bu)同(tong)，對(dui)(dui)電(dian)池的(de)(de)(de)需(xu)求量也不(bu)(bu)同(tong)，所以功(gong)耗也不(bu)(bu)同(tong)。

3信號不受干擾

在一(yi)些(xie)有干(gan)(gan)擾(rao)(rao)的(de)(de)(de)地方，例如(ru)野外、機場、工廠等，一(yi)般(ban)采用(yong)(yong)(yong)(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)方式。分(fen)(fen)(fen)(fen)頻(pin)(pin)方式的(de)(de)(de)抗(kang)干(gan)(gan)擾(rao)(rao)能力(li)不強(qiang)，其(qi)抗(kang)干(gan)(gan)擾(rao)(rao)能力(li)主要取決(jue)于射(she)(she)(she)頻(pin)(pin)功(gong)率(lv)的(de)(de)(de)大小(xiao)(xiao)。分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)(ji)術(shu)的(de)(de)(de)功(gong)率(lv)一(yi)般(ban)是(shi)50dB在50dB左右時(shi)，其(qi)抗(kang)干(gan)(gan)擾(rao)(rao)能力(li)強(qiang)。但由(you)于分(fen)(fen)(fen)(fen)頻(pin)(pin)的(de)(de)(de)干(gan)(gan)擾(rao)(rao)與噪(zao)聲(sheng)(sheng)(主要是(shi)周邊噪(zao)聲(sheng)(sheng))具有很(hen)強(qiang)的(de)(de)(de)互(hu)通性，當分(fen)(fen)(fen)(fen)頻(pin)(pin)發(fa)射(she)(she)(she)的(de)(de)(de)信(xin)號(hao)超過50dB時(shi)，其(qi)抗(kang)千(qian)擾(rao)(rao)能力(li)就會減弱。另(ling)外，在一(yi)些(xie)有噪(zao)音(yin)的(de)(de)(de)環境中(zhong)使用(yong)(yong)(yong)(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)(ji)術(shu)，會使分(fen)(fen)(fen)(fen)頻(pin)(pin)信(xin)號(hao)無(wu)法(fa)到(dao)達發(fa)射(she)(she)(she)端的(de)(de)(de)接(jie)收(shou)(shou)機或者(zhe)造成發(fa)射(she)(she)(she)端信(xin)號(hao)與接(jie)收(shou)(shou)端信(xin)號(hao)的(de)(de)(de)糟合(he)而造成分(fen)(fen)(fen)(fen)頻(pin)(pin)或干(gan)(gan)擾(rao)(rao)(例如(ru)在使用(yong)(yong)(yong)(yong)(yong)室外電話時(shi)) 。而采用(yong)(yong)(yong)(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)(ji)術(shu)的(de)(de)(de)無(wu)線對(dui)講系統(tong)由(you)于發(fa)射(she)(she)(she)功(gong)率(lv)小(xiao)(xiao)，分(fen)(fen)(fen)(fen)頻(pin)(pin)后(hou)的(de)(de)(de)信(xin)號(hao)強(qiang)度比(bi)有線對(dui)講系統(tong)高很(hen)多(在實(shi)(shi)際使用(yong)(yong)(yong)(yong)(yong)中(zhong)分(fen)(fen)(fen)(fen)頻(pin)(pin)設備一(yi)般(ban)可(ke)以(yi)(yi)將系統(tong)信(xin)號(hao)分(fen)(fen)(fen)(fen)頻(pin)(pin)到(dao)50dB以(yi)(yi)上),信(xin)號(hao)不受干(gan)(gan)擾(rao)(rao)。如(ru)果采用(yong)(yong)(yong)(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)(ji)術(shu)，需(xu)要在較大的(de)(de)(de)回波功(gong)率(lv)下才能實(shi)(shi)現信(xin)號(hao)的(de)(de)(de)分(fen)(fen)(fen)(fen)頻(pin)(pin)工作(如(ru)分(fen)(fen)(fen)(fen)頻(pin)(pin)器(qi)發(fa)射(she)(she)(she)信(xin)號(hao)與接(jie)收(shou)(shou)信(xin)號(hao)重疊時(shi)產生(sheng)的(de)(de)(de)千(qian)擾(rao)(rao))和發(fa)送(song)信(xin)號(hao)強(qiang)度降低(同頻(pin)(pin)帶內的(de)(de)(de)兩只天(tian)線對(dui)同一(yi)信(xin)道傳(chuan)輸(shu)的(de)(de)(de)信(xin)號(hao)強(qiang)度基本一(yi)致);如(ru)果采用(yong)(yong)(yong)(yong)(yong)混響技(ji)(ji)術(shu)，則可(ke)以(yi)(yi)實(shi)(shi)現對(dui)無(wu)線信(xin)號(hao)干(gan)(gan)擾(rao)(rao)的(de)(de)(de)抑制(zhi)或降低。