由于(yu)在(zai)戶(hu)(hu)外(wai)、室內等(deng)區域(yu)，無(wu)(wu)線(xian)對講(jiang)系(xi)(xi)(xi)統(tong)(tong)的(de)(de)信號強度(du)較弱，而且采(cai)用(yong)(yong)頻率調制技術（如(ru) MHZ、 NMR、 BSI等(deng)）產生(sheng)的(de)(de)信號傳(chuan)(chuan)輸時(shi)延大，傳(chuan)(chuan)輸距離遠。因(yin)此(ci)有(you)線(xian)對講(jiang)系(xi)(xi)(xi)統(tong)(tong)不適合(he)在(zai)戶(hu)(hu)外(wai)環(huan)境(jing)使(shi)(shi)用(yong)(yong)，特別是在(zai)冬天及低(di)風速季(ji)節(jie)使(shi)(shi)用(yong)(yong)。雖然無(wu)(wu)線(xian)對講(jiang)系(xi)(xi)(xi)統(tong)(tong)也有(you)著不錯的(de)(de)效果。但由于(yu)系(xi)(xi)(xi)統(tong)(tong)工作時(shi)會有(you)一定的(de)(de)干擾，使(shi)(shi)對講(jiang)效果下(xia)降，另外(wai)在(zai)信號較弱時(shi)對用(yong)(yong)戶(hu)(hu)語(yu)音(yin)產生(sheng)了影響。特別是在(zai)人員復雜、通信距離較短或需(xu)要較長時(shi)間(jian)使(shi)(shi)用(yong)(yong)時(shi)。因(yin)此(ci)，更需(xu)要有(you)一個(ge)可(ke)靠的(de)(de)無(wu)(wu)線(xian)對講(jiang)系(xi)(xi)(xi)統(tong)(tong)提供與有(you)線(xian)對講(jiang)系(xi)(xi)(xi)統(tong)(tong)一樣(yang)的(de)(de)語(yu)音(yin)信息與控制。無(wu)(wu)線(xian)對講(jiang)系(xi)(xi)(xi)統(tong)(tong)具有(you)很高的(de)(de)靈活性，它能夠滿足(zu)現(xian)場中所有(you)環(huan)境(jing)使(shi)(shi)用(yong)(yong)需(xu)求并能隨時(shi)切換（如(ru)在(zai)野(ye)外(wai)、戶(hu)(hu)外(wai)電話等(deng)),用(yong)(yong)戶(hu)(hu)可(ke)以(yi)在(zai)任何地點使(shi)(shi)用(yong)(yong)、隨時(shi)、隨地進(jin)行通訊。使(shi)(shi)用(yong)(yong)方便、節(jie)省成本、節(jie)約費用(yong)(yong)。下(xia)面我們來了解一下(xia)無(wu)(wu)線(xian)對講(jiang)系(xi)(xi)(xi)統(tong)(tong)它主要是什(shen)么優(you)點？

1.性能穩定(ding)，可(ke)靠性高

在(zai)(zai)相同無(wu)(wu)線(xian)(xian)傳(chuan)輸距(ju)離(li)下(xia)(xia)，無(wu)(wu)線(xian)(xian)傳(chuan)輸信(xin)號(hao)(hao)更穩(wen)(wen)定(ding)(ding)由于(yu)使(shi)(shi)用了功率放大(da)器(qi)來對(dui)無(wu)(wu)線(xian)(xian)信(xin)號(hao)(hao)進(jin)行壓縮和(he)放大(da)，使(shi)(shi)無(wu)(wu)線(xian)(xian)信(xin)號(hao)(hao)更加穩(wen)(wen)定(ding)(ding)可靠。無(wu)(wu)線(xian)(xian)信(xin)號(hao)(hao)在(zai)(zai)弱電磁環境下(xia)(xia)也(ye)能(neng)保(bao)(bao)(bao)持(chi)較(jiao)(jiao)好(hao)(hao)(hao)的(de)(de)(de)性(xing)(xing)能(neng)。無(wu)(wu)線(xian)(xian)對(dui)講(jiang)系統(tong)具有(you)發(fa)(fa)射(she)(she)(she)功率小(xiao)、抗千(qian)擾能(neng)力(li)強(與有(you)線(xian)(xian)對(dui)講(jiang)系統(tong)比(bi)較(jiao)(jiao))和(he)抗電磁干擾能(neng)力(li)強(與有(you)線(xian)(xian)對(dui)講(jiang)系統(tong)比(bi)較(jiao)(jiao))的(de)(de)(de)特點。無(wu)(wu)線(xian)(xian)對(dui)講(jiang)系統(tong)發(fa)(fa)射(she)(she)(she)信(xin)號(hao)(hao)在(zai)(zai)發(fa)(fa)射(she)(she)(she)前和(he)發(fa)(fa)射(she)(she)(she)后均(jun)能(neng)保(bao)(bao)(bao)持(chi)良(liang)好(hao)(hao)(hao)的(de)(de)(de)性(xing)(xing)能(neng)，使(shi)(shi)用過程中，發(fa)(fa)射(she)(she)(she)信(xin)號(hao)(hao)與接(jie)收(shou)信(xin)號(hao)(hao)完(wan)全不受任何千(qian)擾，可保(bao)(bao)(bao)持(chi)很好(hao)(hao)(hao)的(de)(de)(de)穩(wen)(wen)定(ding)(ding)性(xing)(xing)，具有(you)良(liang)好(hao)(hao)(hao)的(de)(de)(de)抗千(qian)擾性(xing)(xing)和(he)抗低頻(pin)干擾能(neng)力(li)，即使(shi)(shi)在(zai)(zai)惡劣的(de)(de)(de)環境下(xia)(xia)也(ye)能(neng)保(bao)(bao)(bao)持(chi)較(jiao)(jiao)好(hao)(hao)(hao)的(de)(de)(de)性(xing)(xing)能(neng)。因此無(wu)(wu)線(xian)(xian)系統(tong)有(you)較(jiao)(jiao)高的(de)(de)(de)可靠性(xing)(xing)。

2.功耗小、不受天氣(qi)、濕度的(de)影(ying)響(xiang)

無(wu)(wu)線對講(jiang)系(xi)統(tong)(tong)在(zai)不(bu)同(tong)的(de)環(huan)境(jing)(jing)中，無(wu)(wu)線通信設備(bei)和(he)有(you)(you)線通信設備(bei)一(yi)(yi)樣(yang)都(dou)要(yao)(yao)進行電(dian)能的(de)消(xiao)耗。當環(huan)境(jing)(jing)溫度在(zai)-40°C以下時(shi)(shi)，無(wu)(wu)線通信設備(bei)需(xu)要(yao)(yao)每(mei)天(tian)工作(zuo)8小(xiao)時(shi)(shi)左(zuo)右(you);當環(huan)境(jing)(jing)溫度為-20°C時(shi)(shi)，每(mei)天(tian)工作(zuo)8小(xiao)時(shi)(shi)左(zuo)右(you);當環(huan)境(jing)(jing)溫度為-30°C時(shi)(shi)，每(mei)天(tian)工作(zuo)4小(xiao)時(shi)(shi)左(zuo)右(you)。目前市(shi)場上(shang)常見的(de)無(wu)(wu)線對講(jiang)系(xi)統(tong)(tong)有(you)(you)兩(liang)種電(dian)源(yuan)輸入方式，一(yi)(yi)種是(shi)電(dian)源(yuan)輸入，另一(yi)(yi)種是(shi)電(dian)源(yuan)輸出。從這兩(liang)種方式對系(xi)統(tong)(tong)的(de)功(gong)耗來看，電(dian)源(yuan)輸入方式的(de)功(gong)耗更大(da)一(yi)(yi)些，但是(shi)功(gong)耗很小(xiao)。并且(qie)設備(bei)的(de)工作(zuo)環(huan)境(jing)(jing)不(bu)同(tong)，對電(dian)池的(de)需(xu)求量也不(bu)同(tong)，所(suo)以功(gong)耗也不(bu)同(tong)。

3信號不受干擾

在(zai)(zai)一(yi)(yi)些有干(gan)擾(rao)(rao)(rao)的(de)(de)(de)(de)地方，例如野(ye)外、機(ji)場、工(gong)廠等(deng)，一(yi)(yi)般采(cai)用(yong)(yong)分(fen)(fen)頻(pin)(pin)方式。分(fen)(fen)頻(pin)(pin)方式的(de)(de)(de)(de)抗(kang)干(gan)擾(rao)(rao)(rao)能力不強(qiang)(qiang)，其抗(kang)干(gan)擾(rao)(rao)(rao)能力主要(yao)取決于(yu)射(she)(she)頻(pin)(pin)功(gong)(gong)率(lv)的(de)(de)(de)(de)大小。分(fen)(fen)頻(pin)(pin)技(ji)術的(de)(de)(de)(de)功(gong)(gong)率(lv)一(yi)(yi)般是(shi)50dB在(zai)(zai)50dB左右時(shi)(shi)，其抗(kang)干(gan)擾(rao)(rao)(rao)能力強(qiang)(qiang)。但由(you)(you)于(yu)分(fen)(fen)頻(pin)(pin)的(de)(de)(de)(de)干(gan)擾(rao)(rao)(rao)與噪(zao)聲(主要(yao)是(shi)周邊噪(zao)聲)具(ju)有很強(qiang)(qiang)的(de)(de)(de)(de)互通性，當(dang)分(fen)(fen)頻(pin)(pin)發射(she)(she)的(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)超過50dB時(shi)(shi)，其抗(kang)千擾(rao)(rao)(rao)能力就(jiu)會(hui)減弱。另(ling)外，在(zai)(zai)一(yi)(yi)些有噪(zao)音(yin)的(de)(de)(de)(de)環境中使(shi)用(yong)(yong)分(fen)(fen)頻(pin)(pin)技(ji)術，會(hui)使(shi)分(fen)(fen)頻(pin)(pin)信(xin)(xin)(xin)號(hao)(hao)無(wu)法到(dao)達發射(she)(she)端的(de)(de)(de)(de)接(jie)(jie)收機(ji)或(huo)者造成發射(she)(she)端信(xin)(xin)(xin)號(hao)(hao)與接(jie)(jie)收端信(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)糟合而造成分(fen)(fen)頻(pin)(pin)或(huo)干(gan)擾(rao)(rao)(rao)(例如在(zai)(zai)使(shi)用(yong)(yong)室(shi)外電話(hua)時(shi)(shi)) 。而采(cai)用(yong)(yong)分(fen)(fen)頻(pin)(pin)技(ji)術的(de)(de)(de)(de)無(wu)線對(dui)講(jiang)系(xi)統(tong)由(you)(you)于(yu)發射(she)(she)功(gong)(gong)率(lv)小，分(fen)(fen)頻(pin)(pin)后的(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)強(qiang)(qiang)度比有線對(dui)講(jiang)系(xi)統(tong)高很多(在(zai)(zai)實(shi)際使(shi)用(yong)(yong)中分(fen)(fen)頻(pin)(pin)設備一(yi)(yi)般可以(yi)將系(xi)統(tong)信(xin)(xin)(xin)號(hao)(hao)分(fen)(fen)頻(pin)(pin)到(dao)50dB以(yi)上),信(xin)(xin)(xin)號(hao)(hao)不受干(gan)擾(rao)(rao)(rao)。如果采(cai)用(yong)(yong)分(fen)(fen)頻(pin)(pin)技(ji)術，需(xu)要(yao)在(zai)(zai)較(jiao)大的(de)(de)(de)(de)回(hui)波(bo)功(gong)(gong)率(lv)下才能實(shi)現(xian)(xian)信(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)分(fen)(fen)頻(pin)(pin)工(gong)作(如分(fen)(fen)頻(pin)(pin)器發射(she)(she)信(xin)(xin)(xin)號(hao)(hao)與接(jie)(jie)收信(xin)(xin)(xin)號(hao)(hao)重疊時(shi)(shi)產生的(de)(de)(de)(de)千擾(rao)(rao)(rao))和發送(song)信(xin)(xin)(xin)號(hao)(hao)強(qiang)(qiang)度降低(同(tong)頻(pin)(pin)帶內的(de)(de)(de)(de)兩只天線對(dui)同(tong)一(yi)(yi)信(xin)(xin)(xin)道傳輸的(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)強(qiang)(qiang)度基本一(yi)(yi)致);如果采(cai)用(yong)(yong)混響技(ji)術，則(ze)可以(yi)實(shi)現(xian)(xian)對(dui)無(wu)線信(xin)(xin)(xin)號(hao)(hao)干(gan)擾(rao)(rao)(rao)的(de)(de)(de)(de)抑制(zhi)或(huo)降低。