由于在(zai)(zai)戶(hu)(hu)外(wai)、室(shi)內等(deng)區域，無線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)的(de)信號(hao)強度(du)較弱(ruo)，而且(qie)采用(yong)頻率(lv)調制(zhi)技術（如 MHZ、 NMR、 BSI等(deng)）產(chan)(chan)生的(de)信號(hao)傳輸時延(yan)大(da)，傳輸距離遠。因(yin)此(ci)有(you)(you)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)不(bu)適合(he)在(zai)(zai)戶(hu)(hu)外(wai)環境使(shi)(shi)(shi)用(yong)，特別(bie)是在(zai)(zai)冬天及(ji)低風速季節使(shi)(shi)(shi)用(yong)。雖(sui)然無線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)也(ye)有(you)(you)著不(bu)錯的(de)效果(guo)(guo)。但由于系(xi)(xi)統(tong)(tong)(tong)工作時會(hui)有(you)(you)一定的(de)干擾，使(shi)(shi)(shi)對(dui)講(jiang)效果(guo)(guo)下(xia)降，另(ling)外(wai)在(zai)(zai)信號(hao)較弱(ruo)時對(dui)用(yong)戶(hu)(hu)語音產(chan)(chan)生了(le)影響(xiang)。特別(bie)是在(zai)(zai)人員(yuan)復雜、通(tong)信距離較短或需要較長時間使(shi)(shi)(shi)用(yong)時。因(yin)此(ci)，更需要有(you)(you)一個可靠(kao)的(de)無線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)提(ti)供與有(you)(you)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)一樣的(de)語音信息與控制(zhi)。無線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)具有(you)(you)很高的(de)靈(ling)活性(xing)，它能夠滿(man)足現(xian)場中所(suo)有(you)(you)環境使(shi)(shi)(shi)用(yong)需求(qiu)并(bing)能隨時切換（如在(zai)(zai)野外(wai)、戶(hu)(hu)外(wai)電話等(deng)),用(yong)戶(hu)(hu)可以(yi)在(zai)(zai)任何地點(dian)(dian)使(shi)(shi)(shi)用(yong)、隨時、隨地進行(xing)通(tong)訊。使(shi)(shi)(shi)用(yong)方便、節省成本、節約費用(yong)。下(xia)面我們來(lai)了(le)解一下(xia)無線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)它主要是什么優點(dian)(dian)？

1.性能穩定(ding)，可(ke)靠性高(gao)

在(zai)相同無線(xian)(xian)(xian)傳輸(shu)距(ju)離(li)下(xia)，無線(xian)(xian)(xian)傳輸(shu)信(xin)號(hao)(hao)更(geng)穩定(ding)由于(yu)使(shi)用(yong)了(le)功率放大(da)器來(lai)對(dui)(dui)(dui)無線(xian)(xian)(xian)信(xin)號(hao)(hao)進(jin)行壓縮(suo)和(he)放大(da)，使(shi)無線(xian)(xian)(xian)信(xin)號(hao)(hao)更(geng)加穩定(ding)可(ke)靠。無線(xian)(xian)(xian)信(xin)號(hao)(hao)在(zai)弱電磁環境(jing)下(xia)也能(neng)(neng)保(bao)持較(jiao)好(hao)(hao)(hao)的性(xing)(xing)(xing)能(neng)(neng)。無線(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)(jiang)系(xi)統具有發(fa)(fa)射(she)(she)功率小(xiao)、抗千擾(rao)能(neng)(neng)力(li)強(與(yu)有線(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)(jiang)系(xi)統比(bi)較(jiao))和(he)抗電磁干擾(rao)能(neng)(neng)力(li)強(與(yu)有線(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)(jiang)系(xi)統比(bi)較(jiao))的特點。無線(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)(jiang)系(xi)統發(fa)(fa)射(she)(she)信(xin)號(hao)(hao)在(zai)發(fa)(fa)射(she)(she)前和(he)發(fa)(fa)射(she)(she)后均(jun)能(neng)(neng)保(bao)持良好(hao)(hao)(hao)的性(xing)(xing)(xing)能(neng)(neng)，使(shi)用(yong)過程(cheng)中，發(fa)(fa)射(she)(she)信(xin)號(hao)(hao)與(yu)接(jie)收信(xin)號(hao)(hao)完全(quan)不受任何千擾(rao)，可(ke)保(bao)持很好(hao)(hao)(hao)的穩定(ding)性(xing)(xing)(xing)，具有良好(hao)(hao)(hao)的抗千擾(rao)性(xing)(xing)(xing)和(he)抗低頻干擾(rao)能(neng)(neng)力(li)，即使(shi)在(zai)惡劣的環境(jing)下(xia)也能(neng)(neng)保(bao)持較(jiao)好(hao)(hao)(hao)的性(xing)(xing)(xing)能(neng)(neng)。因此無線(xian)(xian)(xian)系(xi)統有較(jiao)高的可(ke)靠性(xing)(xing)(xing)。

2.功耗小、不受天氣、濕度的影(ying)響

無(wu)線(xian)(xian)對講系統在(zai)不(bu)(bu)同的(de)(de)(de)環(huan)(huan)境(jing)中，無(wu)線(xian)(xian)通信設備(bei)和有(you)線(xian)(xian)通信設備(bei)一(yi)(yi)樣都要進行電能的(de)(de)(de)消耗(hao)。當(dang)環(huan)(huan)境(jing)溫(wen)度在(zai)-40°C以(yi)下時(shi)(shi)(shi)(shi)，無(wu)線(xian)(xian)通信設備(bei)需(xu)(xu)要每(mei)(mei)天工作8小(xiao)時(shi)(shi)(shi)(shi)左右(you);當(dang)環(huan)(huan)境(jing)溫(wen)度為-20°C時(shi)(shi)(shi)(shi)，每(mei)(mei)天工作8小(xiao)時(shi)(shi)(shi)(shi)左右(you);當(dang)環(huan)(huan)境(jing)溫(wen)度為-30°C時(shi)(shi)(shi)(shi)，每(mei)(mei)天工作4小(xiao)時(shi)(shi)(shi)(shi)左右(you)。目前市場(chang)上(shang)常見的(de)(de)(de)無(wu)線(xian)(xian)對講系統有(you)兩種(zhong)(zhong)電源輸入(ru)(ru)方式(shi)(shi)，一(yi)(yi)種(zhong)(zhong)是電源輸入(ru)(ru)，另一(yi)(yi)種(zhong)(zhong)是電源輸出(chu)。從這兩種(zhong)(zhong)方式(shi)(shi)對系統的(de)(de)(de)功(gong)耗(hao)來看，電源輸入(ru)(ru)方式(shi)(shi)的(de)(de)(de)功(gong)耗(hao)更大一(yi)(yi)些(xie)，但是功(gong)耗(hao)很小(xiao)。并且設備(bei)的(de)(de)(de)工作環(huan)(huan)境(jing)不(bu)(bu)同，對電池的(de)(de)(de)需(xu)(xu)求量也不(bu)(bu)同，所以(yi)功(gong)耗(hao)也不(bu)(bu)同。

3信號不受干擾

在(zai)(zai)一些有干(gan)(gan)擾(rao)(rao)的(de)(de)(de)(de)地方，例(li)如(ru)(ru)野外(wai)、機(ji)場、工(gong)(gong)廠等，一般(ban)采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)方式。分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)方式的(de)(de)(de)(de)抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)力(li)不強(qiang)，其抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)力(li)主要取決于(yu)射(she)(she)頻(pin)(pin)(pin)(pin)功(gong)率的(de)(de)(de)(de)大小(xiao)。分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術的(de)(de)(de)(de)功(gong)率一般(ban)是50dB在(zai)(zai)50dB左右時(shi)，其抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)力(li)強(qiang)。但由于(yu)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)的(de)(de)(de)(de)干(gan)(gan)擾(rao)(rao)與(yu)噪(zao)聲(主要是周邊噪(zao)聲)具有很強(qiang)的(de)(de)(de)(de)互通性，當(dang)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)發(fa)射(she)(she)的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)超(chao)過50dB時(shi)，其抗(kang)千(qian)擾(rao)(rao)能(neng)力(li)就會(hui)(hui)減弱。另外(wai)，在(zai)(zai)一些有噪(zao)音的(de)(de)(de)(de)環境中使(shi)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術，會(hui)(hui)使(shi)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)無法到(dao)(dao)達發(fa)射(she)(she)端(duan)的(de)(de)(de)(de)接(jie)(jie)收(shou)機(ji)或者(zhe)造成發(fa)射(she)(she)端(duan)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)與(yu)接(jie)(jie)收(shou)端(duan)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)糟合而造成分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)或干(gan)(gan)擾(rao)(rao)(例(li)如(ru)(ru)在(zai)(zai)使(shi)用(yong)(yong)室外(wai)電話時(shi)) 。而采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術的(de)(de)(de)(de)無線(xian)對講(jiang)系統(tong)由于(yu)發(fa)射(she)(she)功(gong)率小(xiao)，分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)后的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)度比(bi)有線(xian)對講(jiang)系統(tong)高很多(在(zai)(zai)實(shi)際使(shi)用(yong)(yong)中分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)設備(bei)一般(ban)可以將系統(tong)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)到(dao)(dao)50dB以上),信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)不受干(gan)(gan)擾(rao)(rao)。如(ru)(ru)果采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術，需要在(zai)(zai)較大的(de)(de)(de)(de)回波功(gong)率下才能(neng)實(shi)現信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)工(gong)(gong)作(如(ru)(ru)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)器發(fa)射(she)(she)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)與(yu)接(jie)(jie)收(shou)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)重疊時(shi)產生(sheng)的(de)(de)(de)(de)千(qian)擾(rao)(rao))和發(fa)送信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)度降低(同(tong)頻(pin)(pin)(pin)(pin)帶內的(de)(de)(de)(de)兩(liang)只天線(xian)對同(tong)一信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)道(dao)傳輸的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)度基本一致(zhi));如(ru)(ru)果采用(yong)(yong)混(hun)響技(ji)(ji)(ji)術，則可以實(shi)現對無線(xian)信(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)干(gan)(gan)擾(rao)(rao)的(de)(de)(de)(de)抑制或降低。