由于在戶外、室(shi)內等(deng)區(qu)域，無(wu)線(xian)對(dui)(dui)(dui)講(jiang)(jiang)(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)信號(hao)強(qiang)度(du)較(jiao)弱，而且采用(yong)頻率調制技術(shu)（如(ru) MHZ、 NMR、 BSI等(deng)）產(chan)生的(de)(de)(de)信號(hao)傳(chuan)輸(shu)時延大，傳(chuan)輸(shu)距離(li)遠。因此有(you)(you)(you)線(xian)對(dui)(dui)(dui)講(jiang)(jiang)(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)不適(shi)合在戶外環境使(shi)用(yong)，特別是(shi)在冬天及低風速(su)季節(jie)使(shi)用(yong)。雖然無(wu)線(xian)對(dui)(dui)(dui)講(jiang)(jiang)(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)也有(you)(you)(you)著不錯的(de)(de)(de)效(xiao)果。但由于系(xi)(xi)(xi)統(tong)(tong)(tong)工(gong)作時會有(you)(you)(you)一定的(de)(de)(de)干擾，使(shi)對(dui)(dui)(dui)講(jiang)(jiang)(jiang)(jiang)(jiang)效(xiao)果下降，另外在信號(hao)較(jiao)弱時對(dui)(dui)(dui)用(yong)戶語音產(chan)生了影響。特別是(shi)在人員(yuan)復(fu)雜、通信距離(li)較(jiao)短或(huo)需要較(jiao)長時間使(shi)用(yong)時。因此，更(geng)需要有(you)(you)(you)一個可靠的(de)(de)(de)無(wu)線(xian)對(dui)(dui)(dui)講(jiang)(jiang)(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)提供與有(you)(you)(you)線(xian)對(dui)(dui)(dui)講(jiang)(jiang)(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)一樣的(de)(de)(de)語音信息與控制。無(wu)線(xian)對(dui)(dui)(dui)講(jiang)(jiang)(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)具(ju)有(you)(you)(you)很(hen)高(gao)的(de)(de)(de)靈活性，它能(neng)(neng)夠滿足現場(chang)中所有(you)(you)(you)環境使(shi)用(yong)需求并能(neng)(neng)隨(sui)時切換（如(ru)在野外、戶外電話等(deng)),用(yong)戶可以(yi)在任何地(di)點使(shi)用(yong)、隨(sui)時、隨(sui)地(di)進行通訊。使(shi)用(yong)方便、節(jie)省成本、節(jie)約費(fei)用(yong)。下面我們來了解(jie)一下無(wu)線(xian)對(dui)(dui)(dui)講(jiang)(jiang)(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)(tong)它主要是(shi)什么優點？

1.性能(neng)穩定，可靠性高(gao)

在相(xiang)同無(wu)線(xian)(xian)(xian)傳(chuan)輸(shu)距離下(xia)，無(wu)線(xian)(xian)(xian)傳(chuan)輸(shu)信(xin)(xin)號(hao)更(geng)穩定由于使用(yong)了(le)功率放大(da)器來對(dui)(dui)無(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)進行(xing)壓縮(suo)和(he)放大(da)，使無(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)更(geng)加穩定可靠(kao)。無(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)在弱電磁環(huan)境下(xia)也(ye)能(neng)(neng)保(bao)(bao)(bao)持較(jiao)(jiao)好(hao)的性(xing)能(neng)(neng)。無(wu)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)(tong)具有發射(she)(she)(she)功率小、抗千(qian)(qian)擾能(neng)(neng)力強(與(yu)有線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)(tong)比(bi)(bi)較(jiao)(jiao))和(he)抗電磁干擾能(neng)(neng)力強(與(yu)有線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)(tong)比(bi)(bi)較(jiao)(jiao))的特點(dian)。無(wu)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)(tong)發射(she)(she)(she)信(xin)(xin)號(hao)在發射(she)(she)(she)前(qian)和(he)發射(she)(she)(she)后(hou)均能(neng)(neng)保(bao)(bao)(bao)持良(liang)好(hao)的性(xing)能(neng)(neng)，使用(yong)過(guo)程(cheng)中，發射(she)(she)(she)信(xin)(xin)號(hao)與(yu)接收(shou)信(xin)(xin)號(hao)完全不受(shou)任(ren)何千(qian)(qian)擾，可保(bao)(bao)(bao)持很好(hao)的穩定性(xing)，具有良(liang)好(hao)的抗千(qian)(qian)擾性(xing)和(he)抗低(di)頻(pin)干擾能(neng)(neng)力，即使在惡(e)劣的環(huan)境下(xia)也(ye)能(neng)(neng)保(bao)(bao)(bao)持較(jiao)(jiao)好(hao)的性(xing)能(neng)(neng)。因此無(wu)線(xian)(xian)(xian)系(xi)統(tong)(tong)有較(jiao)(jiao)高的可靠(kao)性(xing)。

2.功耗(hao)小、不受(shou)天氣、濕(shi)度的影響

無(wu)線對講系統(tong)在(zai)不同(tong)的(de)(de)環境中，無(wu)線通信(xin)設(she)(she)(she)備和有(you)(you)線通信(xin)設(she)(she)(she)備一樣都(dou)要進(jin)行電(dian)(dian)(dian)能的(de)(de)消耗。當環境溫度(du)在(zai)-40°C以下(xia)時(shi)，無(wu)線通信(xin)設(she)(she)(she)備需要每天工(gong)作8小(xiao)時(shi)左右;當環境溫度(du)為(wei)-20°C時(shi)，每天工(gong)作8小(xiao)時(shi)左右;當環境溫度(du)為(wei)-30°C時(shi)，每天工(gong)作4小(xiao)時(shi)左右。目前(qian)市(shi)場上常(chang)見的(de)(de)無(wu)線對講系統(tong)有(you)(you)兩種電(dian)(dian)(dian)源(yuan)(yuan)輸入方(fang)(fang)式，一種是(shi)電(dian)(dian)(dian)源(yuan)(yuan)輸入，另一種是(shi)電(dian)(dian)(dian)源(yuan)(yuan)輸出。從這兩種方(fang)(fang)式對系統(tong)的(de)(de)功耗來看(kan)，電(dian)(dian)(dian)源(yuan)(yuan)輸入方(fang)(fang)式的(de)(de)功耗更大一些，但是(shi)功耗很小(xiao)。并(bing)且設(she)(she)(she)備的(de)(de)工(gong)作環境不同(tong)，對電(dian)(dian)(dian)池的(de)(de)需求量也不同(tong)，所以功耗也不同(tong)。

3信號不受干擾

在(zai)(zai)一些有(you)(you)干(gan)(gan)擾(rao)的(de)(de)(de)(de)(de)地(di)方，例如(ru)野外(wai)(wai)(wai)、機場、工(gong)廠(chang)等，一般(ban)(ban)采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)方式(shi)。分(fen)(fen)(fen)頻(pin)(pin)(pin)方式(shi)的(de)(de)(de)(de)(de)抗(kang)干(gan)(gan)擾(rao)能(neng)(neng)力不強(qiang)(qiang)(qiang)，其(qi)抗(kang)干(gan)(gan)擾(rao)能(neng)(neng)力主要取決于射頻(pin)(pin)(pin)功(gong)(gong)率(lv)(lv)的(de)(de)(de)(de)(de)大小。分(fen)(fen)(fen)頻(pin)(pin)(pin)技術(shu)(shu)的(de)(de)(de)(de)(de)功(gong)(gong)率(lv)(lv)一般(ban)(ban)是50dB在(zai)(zai)50dB左右時(shi)，其(qi)抗(kang)干(gan)(gan)擾(rao)能(neng)(neng)力強(qiang)(qiang)(qiang)。但由(you)于分(fen)(fen)(fen)頻(pin)(pin)(pin)的(de)(de)(de)(de)(de)干(gan)(gan)擾(rao)與噪聲(主要是周邊噪聲)具(ju)有(you)(you)很(hen)強(qiang)(qiang)(qiang)的(de)(de)(de)(de)(de)互(hu)通性，當分(fen)(fen)(fen)頻(pin)(pin)(pin)發(fa)(fa)射的(de)(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)超過50dB時(shi)，其(qi)抗(kang)千擾(rao)能(neng)(neng)力就會減弱。另外(wai)(wai)(wai)，在(zai)(zai)一些有(you)(you)噪音(yin)的(de)(de)(de)(de)(de)環境中使(shi)(shi)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技術(shu)(shu)，會使(shi)(shi)分(fen)(fen)(fen)頻(pin)(pin)(pin)信(xin)(xin)(xin)號(hao)無法(fa)到(dao)達發(fa)(fa)射端的(de)(de)(de)(de)(de)接(jie)收(shou)機或者造成發(fa)(fa)射端信(xin)(xin)(xin)號(hao)與接(jie)收(shou)端信(xin)(xin)(xin)號(hao)的(de)(de)(de)(de)(de)糟(zao)合而(er)(er)造成分(fen)(fen)(fen)頻(pin)(pin)(pin)或干(gan)(gan)擾(rao)(例如(ru)在(zai)(zai)使(shi)(shi)用(yong)(yong)室外(wai)(wai)(wai)電話時(shi)) 。而(er)(er)采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技術(shu)(shu)的(de)(de)(de)(de)(de)無線(xian)對(dui)講系統(tong)由(you)于發(fa)(fa)射功(gong)(gong)率(lv)(lv)小，分(fen)(fen)(fen)頻(pin)(pin)(pin)后的(de)(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)強(qiang)(qiang)(qiang)度(du)比(bi)有(you)(you)線(xian)對(dui)講系統(tong)高很(hen)多(在(zai)(zai)實際使(shi)(shi)用(yong)(yong)中分(fen)(fen)(fen)頻(pin)(pin)(pin)設(she)備一般(ban)(ban)可(ke)以將(jiang)系統(tong)信(xin)(xin)(xin)號(hao)分(fen)(fen)(fen)頻(pin)(pin)(pin)到(dao)50dB以上),信(xin)(xin)(xin)號(hao)不受干(gan)(gan)擾(rao)。如(ru)果(guo)采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技術(shu)(shu)，需要在(zai)(zai)較大的(de)(de)(de)(de)(de)回(hui)波功(gong)(gong)率(lv)(lv)下才(cai)能(neng)(neng)實現(xian)信(xin)(xin)(xin)號(hao)的(de)(de)(de)(de)(de)分(fen)(fen)(fen)頻(pin)(pin)(pin)工(gong)作(如(ru)分(fen)(fen)(fen)頻(pin)(pin)(pin)器發(fa)(fa)射信(xin)(xin)(xin)號(hao)與接(jie)收(shou)信(xin)(xin)(xin)號(hao)重疊時(shi)產生的(de)(de)(de)(de)(de)千擾(rao))和(he)發(fa)(fa)送(song)信(xin)(xin)(xin)號(hao)強(qiang)(qiang)(qiang)度(du)降低(di)(同(tong)頻(pin)(pin)(pin)帶內的(de)(de)(de)(de)(de)兩(liang)只天線(xian)對(dui)同(tong)一信(xin)(xin)(xin)道傳輸(shu)的(de)(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)強(qiang)(qiang)(qiang)度(du)基本一致);如(ru)果(guo)采用(yong)(yong)混響技術(shu)(shu)，則可(ke)以實現(xian)對(dui)無線(xian)信(xin)(xin)(xin)號(hao)干(gan)(gan)擾(rao)的(de)(de)(de)(de)(de)抑(yi)制或降低(di)。