由于在(zai)(zai)戶(hu)外(wai)(wai)、室內等區域，無線(xian)對(dui)(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)的(de)(de)信號強度較(jiao)弱(ruo)(ruo)，而且采用(yong)(yong)頻率調制(zhi)技術（如(ru) MHZ、 NMR、 BSI等）產(chan)生的(de)(de)信號傳輸時(shi)(shi)延大，傳輸距離遠。因(yin)此(ci)有線(xian)對(dui)(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)不適合在(zai)(zai)戶(hu)外(wai)(wai)環(huan)境(jing)使(shi)(shi)用(yong)(yong)，特別(bie)是(shi)(shi)在(zai)(zai)冬天及低風(feng)速(su)季節(jie)使(shi)(shi)用(yong)(yong)。雖然無線(xian)對(dui)(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)也有著(zhu)不錯(cuo)的(de)(de)效果。但由于系(xi)(xi)統(tong)(tong)(tong)(tong)工作時(shi)(shi)會有一(yi)定的(de)(de)干擾(rao)，使(shi)(shi)對(dui)(dui)(dui)(dui)講(jiang)效果下降(jiang)，另外(wai)(wai)在(zai)(zai)信號較(jiao)弱(ruo)(ruo)時(shi)(shi)對(dui)(dui)(dui)(dui)用(yong)(yong)戶(hu)語(yu)音(yin)產(chan)生了影(ying)響。特別(bie)是(shi)(shi)在(zai)(zai)人員復雜、通信距離較(jiao)短或需(xu)要較(jiao)長時(shi)(shi)間(jian)使(shi)(shi)用(yong)(yong)時(shi)(shi)。因(yin)此(ci)，更需(xu)要有一(yi)個(ge)可靠的(de)(de)無線(xian)對(dui)(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)提供與(yu)有線(xian)對(dui)(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)一(yi)樣的(de)(de)語(yu)音(yin)信息與(yu)控制(zhi)。無線(xian)對(dui)(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)具(ju)有很高的(de)(de)靈活性，它能夠滿足(zu)現場中所有環(huan)境(jing)使(shi)(shi)用(yong)(yong)需(xu)求并能隨時(shi)(shi)切換（如(ru)在(zai)(zai)野外(wai)(wai)、戶(hu)外(wai)(wai)電話等),用(yong)(yong)戶(hu)可以在(zai)(zai)任何地點(dian)使(shi)(shi)用(yong)(yong)、隨時(shi)(shi)、隨地進行(xing)通訊。使(shi)(shi)用(yong)(yong)方便(bian)、節(jie)省成本(ben)、節(jie)約費用(yong)(yong)。下面我們來了解一(yi)下無線(xian)對(dui)(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)它主要是(shi)(shi)什(shen)么優點(dian)？

1.性能穩定，可靠性高

在相同無(wu)線(xian)(xian)(xian)(xian)傳(chuan)輸距(ju)離下(xia)，無(wu)線(xian)(xian)(xian)(xian)傳(chuan)輸信(xin)(xin)(xin)號(hao)更(geng)穩定由于使(shi)用(yong)了(le)功率放大器來對無(wu)線(xian)(xian)(xian)(xian)信(xin)(xin)(xin)號(hao)進行(xing)壓縮和放大，使(shi)無(wu)線(xian)(xian)(xian)(xian)信(xin)(xin)(xin)號(hao)更(geng)加穩定可靠。無(wu)線(xian)(xian)(xian)(xian)信(xin)(xin)(xin)號(hao)在弱電(dian)磁環境下(xia)也能(neng)(neng)(neng)(neng)(neng)保(bao)持(chi)較(jiao)(jiao)好(hao)(hao)的(de)性(xing)能(neng)(neng)(neng)(neng)(neng)。無(wu)線(xian)(xian)(xian)(xian)對講(jiang)(jiang)(jiang)系統具有(you)發射功率小、抗(kang)(kang)千擾(rao)能(neng)(neng)(neng)(neng)(neng)力(li)強(與(yu)有(you)線(xian)(xian)(xian)(xian)對講(jiang)(jiang)(jiang)系統比較(jiao)(jiao))和抗(kang)(kang)電(dian)磁干(gan)擾(rao)能(neng)(neng)(neng)(neng)(neng)力(li)強(與(yu)有(you)線(xian)(xian)(xian)(xian)對講(jiang)(jiang)(jiang)系統比較(jiao)(jiao))的(de)特(te)點。無(wu)線(xian)(xian)(xian)(xian)對講(jiang)(jiang)(jiang)系統發射信(xin)(xin)(xin)號(hao)在發射前和發射后均能(neng)(neng)(neng)(neng)(neng)保(bao)持(chi)良好(hao)(hao)的(de)性(xing)能(neng)(neng)(neng)(neng)(neng)，使(shi)用(yong)過(guo)程(cheng)中，發射信(xin)(xin)(xin)號(hao)與(yu)接(jie)收信(xin)(xin)(xin)號(hao)完全不受任何千擾(rao)，可保(bao)持(chi)很好(hao)(hao)的(de)穩定性(xing)，具有(you)良好(hao)(hao)的(de)抗(kang)(kang)千擾(rao)性(xing)和抗(kang)(kang)低頻干(gan)擾(rao)能(neng)(neng)(neng)(neng)(neng)力(li)，即(ji)使(shi)在惡劣的(de)環境下(xia)也能(neng)(neng)(neng)(neng)(neng)保(bao)持(chi)較(jiao)(jiao)好(hao)(hao)的(de)性(xing)能(neng)(neng)(neng)(neng)(neng)。因此無(wu)線(xian)(xian)(xian)(xian)系統有(you)較(jiao)(jiao)高的(de)可靠性(xing)。

2.功耗小(xiao)、不(bu)受(shou)天氣、濕度的影(ying)響

無(wu)(wu)線對(dui)講(jiang)系(xi)統(tong)在不(bu)同(tong)的(de)環境(jing)中，無(wu)(wu)線通(tong)(tong)信(xin)設備(bei)和有線通(tong)(tong)信(xin)設備(bei)一(yi)樣(yang)都要進行電(dian)能的(de)消耗(hao)。當環境(jing)溫(wen)(wen)度在-40°C以下時(shi)，無(wu)(wu)線通(tong)(tong)信(xin)設備(bei)需要每天(tian)工作(zuo)8小時(shi)左(zuo)(zuo)右(you);當環境(jing)溫(wen)(wen)度為(wei)(wei)-20°C時(shi)，每天(tian)工作(zuo)8小時(shi)左(zuo)(zuo)右(you);當環境(jing)溫(wen)(wen)度為(wei)(wei)-30°C時(shi)，每天(tian)工作(zuo)4小時(shi)左(zuo)(zuo)右(you)。目前(qian)市(shi)場上常見的(de)無(wu)(wu)線對(dui)講(jiang)系(xi)統(tong)有兩(liang)種(zhong)電(dian)源(yuan)輸入(ru)(ru)方(fang)式(shi)，一(yi)種(zhong)是電(dian)源(yuan)輸入(ru)(ru)，另一(yi)種(zhong)是電(dian)源(yuan)輸出(chu)。從這(zhe)兩(liang)種(zhong)方(fang)式(shi)對(dui)系(xi)統(tong)的(de)功(gong)(gong)耗(hao)來看，電(dian)源(yuan)輸入(ru)(ru)方(fang)式(shi)的(de)功(gong)(gong)耗(hao)更大一(yi)些，但是功(gong)(gong)耗(hao)很小。并且(qie)設備(bei)的(de)工作(zuo)環境(jing)不(bu)同(tong)，對(dui)電(dian)池的(de)需求量也不(bu)同(tong)，所以功(gong)(gong)耗(hao)也不(bu)同(tong)。

3信號不受干擾

在(zai)一(yi)(yi)些有(you)(you)干(gan)(gan)擾(rao)(rao)的(de)(de)(de)(de)地(di)方，例如野外(wai)、機(ji)場(chang)、工(gong)廠等，一(yi)(yi)般采(cai)用(yong)分(fen)(fen)(fen)(fen)頻方式(shi)。分(fen)(fen)(fen)(fen)頻方式(shi)的(de)(de)(de)(de)抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)力(li)不強(qiang)，其(qi)(qi)抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)力(li)主要(yao)取(qu)決于(yu)射頻功率的(de)(de)(de)(de)大(da)小。分(fen)(fen)(fen)(fen)頻技(ji)(ji)術(shu)的(de)(de)(de)(de)功率一(yi)(yi)般是(shi)(shi)50dB在(zai)50dB左右時，其(qi)(qi)抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)力(li)強(qiang)。但由于(yu)分(fen)(fen)(fen)(fen)頻的(de)(de)(de)(de)干(gan)(gan)擾(rao)(rao)與噪(zao)聲(主要(yao)是(shi)(shi)周邊噪(zao)聲)具(ju)有(you)(you)很強(qiang)的(de)(de)(de)(de)互(hu)通性(xing)，當(dang)分(fen)(fen)(fen)(fen)頻發射的(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)超過50dB時，其(qi)(qi)抗(kang)千擾(rao)(rao)能(neng)力(li)就(jiu)會(hui)減弱。另外(wai)，在(zai)一(yi)(yi)些有(you)(you)噪(zao)音(yin)的(de)(de)(de)(de)環境(jing)中使(shi)(shi)用(yong)分(fen)(fen)(fen)(fen)頻技(ji)(ji)術(shu)，會(hui)使(shi)(shi)分(fen)(fen)(fen)(fen)頻信(xin)(xin)號(hao)(hao)無法到(dao)達發射端的(de)(de)(de)(de)接(jie)收機(ji)或(huo)者(zhe)造成(cheng)發射端信(xin)(xin)號(hao)(hao)與接(jie)收端信(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)糟(zao)合而造成(cheng)分(fen)(fen)(fen)(fen)頻或(huo)干(gan)(gan)擾(rao)(rao)(例如在(zai)使(shi)(shi)用(yong)室(shi)外(wai)電(dian)話時) 。而采(cai)用(yong)分(fen)(fen)(fen)(fen)頻技(ji)(ji)術(shu)的(de)(de)(de)(de)無線(xian)對講系統(tong)由于(yu)發射功率小，分(fen)(fen)(fen)(fen)頻后的(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)強(qiang)度(du)比有(you)(you)線(xian)對講系統(tong)高很多(在(zai)實(shi)(shi)際使(shi)(shi)用(yong)中分(fen)(fen)(fen)(fen)頻設備一(yi)(yi)般可(ke)(ke)以將系統(tong)信(xin)(xin)號(hao)(hao)分(fen)(fen)(fen)(fen)頻到(dao)50dB以上(shang)),信(xin)(xin)號(hao)(hao)不受干(gan)(gan)擾(rao)(rao)。如果采(cai)用(yong)分(fen)(fen)(fen)(fen)頻技(ji)(ji)術(shu)，需要(yao)在(zai)較大(da)的(de)(de)(de)(de)回(hui)波功率下才能(neng)實(shi)(shi)現信(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)分(fen)(fen)(fen)(fen)頻工(gong)作(如分(fen)(fen)(fen)(fen)頻器發射信(xin)(xin)號(hao)(hao)與接(jie)收信(xin)(xin)號(hao)(hao)重(zhong)疊時產生的(de)(de)(de)(de)千擾(rao)(rao))和發送(song)信(xin)(xin)號(hao)(hao)強(qiang)度(du)降低(同頻帶內的(de)(de)(de)(de)兩只天線(xian)對同一(yi)(yi)信(xin)(xin)道傳輸的(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)強(qiang)度(du)基本一(yi)(yi)致);如果采(cai)用(yong)混響技(ji)(ji)術(shu)，則(ze)可(ke)(ke)以實(shi)(shi)現對無線(xian)信(xin)(xin)號(hao)(hao)干(gan)(gan)擾(rao)(rao)的(de)(de)(de)(de)抑制或(huo)降低。