由(you)于(yu)在(zai)(zai)戶(hu)外(wai)、室內等區域(yu)，無(wu)(wu)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)的(de)信(xin)(xin)號(hao)(hao)強度較(jiao)(jiao)弱(ruo)，而且采用(yong)(yong)(yong)(yong)頻率調制技術（如(ru) MHZ、 NMR、 BSI等）產(chan)生的(de)信(xin)(xin)號(hao)(hao)傳(chuan)輸(shu)時延(yan)大，傳(chuan)輸(shu)距離遠。因此(ci)有(you)(you)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)不適合在(zai)(zai)戶(hu)外(wai)環境(jing)使(shi)用(yong)(yong)(yong)(yong)，特別是(shi)在(zai)(zai)冬天及低(di)風速季節使(shi)用(yong)(yong)(yong)(yong)。雖(sui)然無(wu)(wu)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)也(ye)有(you)(you)著不錯的(de)效果。但由(you)于(yu)系(xi)(xi)(xi)統(tong)(tong)(tong)工作(zuo)時會(hui)有(you)(you)一定的(de)干擾，使(shi)對(dui)講(jiang)效果下(xia)(xia)降，另外(wai)在(zai)(zai)信(xin)(xin)號(hao)(hao)較(jiao)(jiao)弱(ruo)時對(dui)用(yong)(yong)(yong)(yong)戶(hu)語(yu)音(yin)產(chan)生了影響。特別是(shi)在(zai)(zai)人員復(fu)雜、通信(xin)(xin)距離較(jiao)(jiao)短或需要(yao)較(jiao)(jiao)長時間(jian)使(shi)用(yong)(yong)(yong)(yong)時。因此(ci)，更需要(yao)有(you)(you)一個可靠的(de)無(wu)(wu)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)提(ti)供與(yu)有(you)(you)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)一樣的(de)語(yu)音(yin)信(xin)(xin)息與(yu)控制。無(wu)(wu)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)具(ju)有(you)(you)很高的(de)靈活性(xing)，它能(neng)夠滿足(zu)現場中(zhong)所有(you)(you)環境(jing)使(shi)用(yong)(yong)(yong)(yong)需求(qiu)并能(neng)隨時切換（如(ru)在(zai)(zai)野(ye)外(wai)、戶(hu)外(wai)電話等),用(yong)(yong)(yong)(yong)戶(hu)可以在(zai)(zai)任(ren)何地點使(shi)用(yong)(yong)(yong)(yong)、隨時、隨地進(jin)行(xing)通訊(xun)。使(shi)用(yong)(yong)(yong)(yong)方便(bian)、節省成本(ben)、節約(yue)費用(yong)(yong)(yong)(yong)。下(xia)(xia)面我們來了解一下(xia)(xia)無(wu)(wu)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)它主要(yao)是(shi)什么優點？

1.性(xing)能(neng)穩定，可靠性(xing)高

在(zai)(zai)(zai)相(xiang)同無(wu)(wu)線(xian)(xian)傳輸距離(li)下(xia)，無(wu)(wu)線(xian)(xian)傳輸信(xin)號(hao)更穩(wen)定由于使用了功(gong)率(lv)放大器來對(dui)(dui)無(wu)(wu)線(xian)(xian)信(xin)號(hao)進行壓縮和放大，使無(wu)(wu)線(xian)(xian)信(xin)號(hao)更加(jia)穩(wen)定可靠(kao)(kao)。無(wu)(wu)線(xian)(xian)信(xin)號(hao)在(zai)(zai)(zai)弱電磁環境下(xia)也能(neng)(neng)(neng)保(bao)(bao)持較(jiao)好(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)(de)性(xing)(xing)能(neng)(neng)(neng)。無(wu)(wu)線(xian)(xian)對(dui)(dui)講系(xi)統(tong)具(ju)有(you)(you)發(fa)射功(gong)率(lv)小(xiao)、抗(kang)(kang)千(qian)擾能(neng)(neng)(neng)力強(qiang)(與有(you)(you)線(xian)(xian)對(dui)(dui)講系(xi)統(tong)比(bi)(bi)較(jiao))和抗(kang)(kang)電磁干(gan)擾能(neng)(neng)(neng)力強(qiang)(與有(you)(you)線(xian)(xian)對(dui)(dui)講系(xi)統(tong)比(bi)(bi)較(jiao))的(de)(de)(de)(de)特點。無(wu)(wu)線(xian)(xian)對(dui)(dui)講系(xi)統(tong)發(fa)射信(xin)號(hao)在(zai)(zai)(zai)發(fa)射前和發(fa)射后均能(neng)(neng)(neng)保(bao)(bao)持良(liang)好(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)(de)性(xing)(xing)能(neng)(neng)(neng)，使用過(guo)程中，發(fa)射信(xin)號(hao)與接收信(xin)號(hao)完全不(bu)受任何千(qian)擾，可保(bao)(bao)持很好(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)(de)穩(wen)定性(xing)(xing)，具(ju)有(you)(you)良(liang)好(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)(de)抗(kang)(kang)千(qian)擾性(xing)(xing)和抗(kang)(kang)低頻干(gan)擾能(neng)(neng)(neng)力，即使在(zai)(zai)(zai)惡(e)劣的(de)(de)(de)(de)環境下(xia)也能(neng)(neng)(neng)保(bao)(bao)持較(jiao)好(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)(de)性(xing)(xing)能(neng)(neng)(neng)。因此無(wu)(wu)線(xian)(xian)系(xi)統(tong)有(you)(you)較(jiao)高的(de)(de)(de)(de)可靠(kao)(kao)性(xing)(xing)。

2.功耗小、不(bu)受天氣(qi)、濕度的影響

無線對(dui)講系(xi)(xi)統(tong)在(zai)不(bu)同(tong)的(de)環(huan)境中，無線通(tong)信設備(bei)(bei)和有線通(tong)信設備(bei)(bei)一樣都要進(jin)行電能的(de)消耗(hao)(hao)。當(dang)環(huan)境溫(wen)(wen)度在(zai)-40°C以下時，無線通(tong)信設備(bei)(bei)需要每天(tian)工(gong)作(zuo)(zuo)8小時左右;當(dang)環(huan)境溫(wen)(wen)度為-20°C時，每天(tian)工(gong)作(zuo)(zuo)8小時左右;當(dang)環(huan)境溫(wen)(wen)度為-30°C時，每天(tian)工(gong)作(zuo)(zuo)4小時左右。目前市場上(shang)常見的(de)無線對(dui)講系(xi)(xi)統(tong)有兩(liang)種電源(yuan)輸入(ru)方式(shi)，一種是電源(yuan)輸入(ru)，另一種是電源(yuan)輸出。從這兩(liang)種方式(shi)對(dui)系(xi)(xi)統(tong)的(de)功(gong)(gong)耗(hao)(hao)來看，電源(yuan)輸入(ru)方式(shi)的(de)功(gong)(gong)耗(hao)(hao)更大(da)一些，但是功(gong)(gong)耗(hao)(hao)很小。并(bing)且設備(bei)(bei)的(de)工(gong)作(zuo)(zuo)環(huan)境不(bu)同(tong)，對(dui)電池的(de)需求(qiu)量也不(bu)同(tong)，所(suo)以功(gong)(gong)耗(hao)(hao)也不(bu)同(tong)。

3信號不受干擾

在一(yi)些有(you)干擾的(de)(de)地(di)方，例如(ru)野外(wai)、機場、工廠等，一(yi)般(ban)采用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)方式(shi)(shi)。分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)方式(shi)(shi)的(de)(de)抗干擾能力(li)不強(qiang)(qiang)，其(qi)抗干擾能力(li)主要取決于(yu)射(she)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)功(gong)率的(de)(de)大小。分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)技(ji)術的(de)(de)功(gong)率一(yi)般(ban)是(shi)50dB在50dB左右時(shi)，其(qi)抗干擾能力(li)強(qiang)(qiang)。但(dan)由于(yu)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)的(de)(de)干擾與噪聲(sheng)(主要是(shi)周(zhou)邊噪聲(sheng))具有(you)很強(qiang)(qiang)的(de)(de)互(hu)通性，當(dang)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)發(fa)射(she)的(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)超過50dB時(shi)，其(qi)抗千(qian)擾能力(li)就會(hui)減弱。另外(wai)，在一(yi)些有(you)噪音(yin)的(de)(de)環境中使(shi)(shi)用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)技(ji)術，會(hui)使(shi)(shi)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)無(wu)法到(dao)達發(fa)射(she)端(duan)(duan)的(de)(de)接收機或者造(zao)成(cheng)發(fa)射(she)端(duan)(duan)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接收端(duan)(duan)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)糟合而造(zao)成(cheng)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)或干擾(例如(ru)在使(shi)(shi)用(yong)室外(wai)電話時(shi)) 。而采用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)技(ji)術的(de)(de)無(wu)線對(dui)講(jiang)系(xi)統由于(yu)發(fa)射(she)功(gong)率小，分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)后的(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)度(du)比有(you)線對(dui)講(jiang)系(xi)統高很多(在實(shi)際使(shi)(shi)用(yong)中分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)設備一(yi)般(ban)可以(yi)將系(xi)統信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)到(dao)50dB以(yi)上),信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)不受干擾。如(ru)果采用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)技(ji)術，需要在較(jiao)大的(de)(de)回波功(gong)率下才能實(shi)現信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)工作(如(ru)分(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)器(qi)發(fa)射(she)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接收信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)重疊時(shi)產(chan)生的(de)(de)千(qian)擾)和發(fa)送信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)度(du)降低(同頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)帶內的(de)(de)兩只天線對(dui)同一(yi)信(xin)(xin)(xin)道傳輸的(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)度(du)基本一(yi)致);如(ru)果采用(yong)混響技(ji)術，則可以(yi)實(shi)現對(dui)無(wu)線信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)干擾的(de)(de)抑制或降低。