由(you)于在(zai)戶外(wai)、室(shi)內(nei)等區域，無(wu)(wu)(wu)線(xian)對(dui)講(jiang)(jiang)系統(tong)的(de)(de)(de)(de)信號(hao)強度較(jiao)(jiao)弱，而且采用(yong)(yong)頻率調制技術（如 MHZ、 NMR、 BSI等）產生的(de)(de)(de)(de)信號(hao)傳(chuan)輸時(shi)(shi)延(yan)大，傳(chuan)輸距離(li)遠。因此有(you)(you)線(xian)對(dui)講(jiang)(jiang)系統(tong)不適合在(zai)戶外(wai)環(huan)境使(shi)用(yong)(yong)，特別是(shi)在(zai)冬天及低風速季節(jie)(jie)使(shi)用(yong)(yong)。雖然無(wu)(wu)(wu)線(xian)對(dui)講(jiang)(jiang)系統(tong)也(ye)有(you)(you)著不錯(cuo)的(de)(de)(de)(de)效(xiao)果。但由(you)于系統(tong)工作時(shi)(shi)會有(you)(you)一定的(de)(de)(de)(de)干擾，使(shi)對(dui)講(jiang)(jiang)效(xiao)果下(xia)(xia)降，另外(wai)在(zai)信號(hao)較(jiao)(jiao)弱時(shi)(shi)對(dui)用(yong)(yong)戶語音產生了(le)影響。特別是(shi)在(zai)人員復雜、通信距離(li)較(jiao)(jiao)短或需要(yao)較(jiao)(jiao)長時(shi)(shi)間使(shi)用(yong)(yong)時(shi)(shi)。因此，更需要(yao)有(you)(you)一個可靠(kao)的(de)(de)(de)(de)無(wu)(wu)(wu)線(xian)對(dui)講(jiang)(jiang)系統(tong)提供與有(you)(you)線(xian)對(dui)講(jiang)(jiang)系統(tong)一樣的(de)(de)(de)(de)語音信息與控制。無(wu)(wu)(wu)線(xian)對(dui)講(jiang)(jiang)系統(tong)具有(you)(you)很高的(de)(de)(de)(de)靈(ling)活性，它(ta)能夠滿足現(xian)場(chang)中所有(you)(you)環(huan)境使(shi)用(yong)(yong)需求并(bing)能隨時(shi)(shi)切換（如在(zai)野(ye)外(wai)、戶外(wai)電話(hua)等),用(yong)(yong)戶可以在(zai)任(ren)何(he)地點(dian)使(shi)用(yong)(yong)、隨時(shi)(shi)、隨地進(jin)行通訊。使(shi)用(yong)(yong)方便、節(jie)(jie)省(sheng)成本、節(jie)(jie)約費用(yong)(yong)。下(xia)(xia)面我們來了(le)解一下(xia)(xia)無(wu)(wu)(wu)線(xian)對(dui)講(jiang)(jiang)系統(tong)它(ta)主要(yao)是(shi)什么優(you)點(dian)？

1.性能穩(wen)定，可靠性高

在相同(tong)無(wu)(wu)線(xian)(xian)(xian)傳輸距(ju)離下(xia)，無(wu)(wu)線(xian)(xian)(xian)傳輸信(xin)號(hao)更穩定(ding)由于使用了功率放大器來(lai)對無(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)進行壓(ya)縮和放大，使無(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)更加穩定(ding)可靠(kao)。無(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)在弱電(dian)磁環境(jing)下(xia)也能(neng)(neng)保(bao)持(chi)較(jiao)好(hao)的(de)(de)(de)性(xing)(xing)(xing)能(neng)(neng)。無(wu)(wu)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)(tong)具有發(fa)(fa)射功率小(xiao)、抗千(qian)擾能(neng)(neng)力(li)強(與(yu)有線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)(tong)比較(jiao))和抗電(dian)磁干擾能(neng)(neng)力(li)強(與(yu)有線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)(tong)比較(jiao))的(de)(de)(de)特點。無(wu)(wu)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)(tong)發(fa)(fa)射信(xin)號(hao)在發(fa)(fa)射前和發(fa)(fa)射后均能(neng)(neng)保(bao)持(chi)良好(hao)的(de)(de)(de)性(xing)(xing)(xing)能(neng)(neng)，使用過(guo)程中，發(fa)(fa)射信(xin)號(hao)與(yu)接(jie)收信(xin)號(hao)完(wan)全不受任何(he)千(qian)擾，可保(bao)持(chi)很(hen)好(hao)的(de)(de)(de)穩定(ding)性(xing)(xing)(xing)，具有良好(hao)的(de)(de)(de)抗千(qian)擾性(xing)(xing)(xing)和抗低頻干擾能(neng)(neng)力(li)，即使在惡(e)劣的(de)(de)(de)環境(jing)下(xia)也能(neng)(neng)保(bao)持(chi)較(jiao)好(hao)的(de)(de)(de)性(xing)(xing)(xing)能(neng)(neng)。因此無(wu)(wu)線(xian)(xian)(xian)系(xi)統(tong)(tong)(tong)有較(jiao)高的(de)(de)(de)可靠(kao)性(xing)(xing)(xing)。

2.功耗小、不(bu)受天氣、濕度的(de)影響

無(wu)線(xian)對(dui)講系統(tong)在不(bu)同的(de)(de)環境(jing)中(zhong)，無(wu)線(xian)通(tong)信(xin)設備和有線(xian)通(tong)信(xin)設備一樣都要進行電(dian)能的(de)(de)消耗。當(dang)環境(jing)溫度(du)在-40°C以(yi)下時(shi)，無(wu)線(xian)通(tong)信(xin)設備需(xu)要每(mei)天工(gong)作(zuo)8小時(shi)左(zuo)右;當(dang)環境(jing)溫度(du)為-20°C時(shi)，每(mei)天工(gong)作(zuo)8小時(shi)左(zuo)右;當(dang)環境(jing)溫度(du)為-30°C時(shi)，每(mei)天工(gong)作(zuo)4小時(shi)左(zuo)右。目前市場上常見的(de)(de)無(wu)線(xian)對(dui)講系統(tong)有兩種(zhong)電(dian)源(yuan)輸入方式，一種(zhong)是(shi)電(dian)源(yuan)輸入，另(ling)一種(zhong)是(shi)電(dian)源(yuan)輸出(chu)。從這(zhe)兩種(zhong)方式對(dui)系統(tong)的(de)(de)功(gong)(gong)耗來看，電(dian)源(yuan)輸入方式的(de)(de)功(gong)(gong)耗更大一些，但(dan)是(shi)功(gong)(gong)耗很小。并且設備的(de)(de)工(gong)作(zuo)環境(jing)不(bu)同，對(dui)電(dian)池(chi)的(de)(de)需(xu)求(qiu)量(liang)也不(bu)同，所(suo)以(yi)功(gong)(gong)耗也不(bu)同。

3信號不受干擾

在(zai)(zai)一(yi)(yi)些有干(gan)(gan)擾(rao)(rao)(rao)(rao)的(de)(de)(de)地方，例(li)如野外(wai)、機場(chang)、工廠等(deng)，一(yi)(yi)般采(cai)用(yong)分(fen)(fen)(fen)(fen)頻(pin)方式。分(fen)(fen)(fen)(fen)頻(pin)方式的(de)(de)(de)抗干(gan)(gan)擾(rao)(rao)(rao)(rao)能(neng)(neng)力不強，其抗干(gan)(gan)擾(rao)(rao)(rao)(rao)能(neng)(neng)力主要(yao)取決于(yu)(yu)射頻(pin)功(gong)率(lv)的(de)(de)(de)大(da)小(xiao)。分(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)(shu)的(de)(de)(de)功(gong)率(lv)一(yi)(yi)般是50dB在(zai)(zai)50dB左右時，其抗干(gan)(gan)擾(rao)(rao)(rao)(rao)能(neng)(neng)力強。但由(you)于(yu)(yu)分(fen)(fen)(fen)(fen)頻(pin)的(de)(de)(de)干(gan)(gan)擾(rao)(rao)(rao)(rao)與噪聲(主要(yao)是周邊(bian)噪聲)具(ju)有很(hen)強的(de)(de)(de)互通(tong)性，當分(fen)(fen)(fen)(fen)頻(pin)發(fa)射的(de)(de)(de)信(xin)(xin)號(hao)超過50dB時，其抗千(qian)擾(rao)(rao)(rao)(rao)能(neng)(neng)力就會減弱。另外(wai)，在(zai)(zai)一(yi)(yi)些有噪音(yin)的(de)(de)(de)環境中(zhong)使(shi)用(yong)分(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)(shu)，會使(shi)分(fen)(fen)(fen)(fen)頻(pin)信(xin)(xin)號(hao)無(wu)法到(dao)(dao)達發(fa)射端的(de)(de)(de)接收機或者造成(cheng)發(fa)射端信(xin)(xin)號(hao)與接收端信(xin)(xin)號(hao)的(de)(de)(de)糟合而(er)造成(cheng)分(fen)(fen)(fen)(fen)頻(pin)或干(gan)(gan)擾(rao)(rao)(rao)(rao)(例(li)如在(zai)(zai)使(shi)用(yong)室外(wai)電(dian)話時) 。而(er)采(cai)用(yong)分(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)(shu)的(de)(de)(de)無(wu)線對講(jiang)系(xi)統由(you)于(yu)(yu)發(fa)射功(gong)率(lv)小(xiao)，分(fen)(fen)(fen)(fen)頻(pin)后的(de)(de)(de)信(xin)(xin)號(hao)強度比有線對講(jiang)系(xi)統高很(hen)多(在(zai)(zai)實(shi)際使(shi)用(yong)中(zhong)分(fen)(fen)(fen)(fen)頻(pin)設備一(yi)(yi)般可(ke)以將(jiang)系(xi)統信(xin)(xin)號(hao)分(fen)(fen)(fen)(fen)頻(pin)到(dao)(dao)50dB以上),信(xin)(xin)號(hao)不受干(gan)(gan)擾(rao)(rao)(rao)(rao)。如果(guo)采(cai)用(yong)分(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)(shu)，需要(yao)在(zai)(zai)較大(da)的(de)(de)(de)回波(bo)功(gong)率(lv)下才(cai)能(neng)(neng)實(shi)現信(xin)(xin)號(hao)的(de)(de)(de)分(fen)(fen)(fen)(fen)頻(pin)工作(如分(fen)(fen)(fen)(fen)頻(pin)器發(fa)射信(xin)(xin)號(hao)與接收信(xin)(xin)號(hao)重疊(die)時產生(sheng)的(de)(de)(de)千(qian)擾(rao)(rao)(rao)(rao))和(he)發(fa)送信(xin)(xin)號(hao)強度降(jiang)低(di)(同頻(pin)帶(dai)內的(de)(de)(de)兩只天線對同一(yi)(yi)信(xin)(xin)道傳(chuan)輸的(de)(de)(de)信(xin)(xin)號(hao)強度基本一(yi)(yi)致(zhi));如果(guo)采(cai)用(yong)混響(xiang)技(ji)術(shu)(shu)，則可(ke)以實(shi)現對無(wu)線信(xin)(xin)號(hao)干(gan)(gan)擾(rao)(rao)(rao)(rao)的(de)(de)(de)抑(yi)制或降(jiang)低(di)。