由(you)于(yu)在(zai)(zai)(zai)(zai)戶(hu)外(wai)、室內等區(qu)域，無(wu)線(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)的信(xin)號強度較弱，而且(qie)采用(yong)頻率調制技術（如 MHZ、 NMR、 BSI等）產(chan)生(sheng)(sheng)的信(xin)號傳輸(shu)時(shi)(shi)(shi)(shi)延大，傳輸(shu)距(ju)離遠(yuan)。因(yin)此(ci)有(you)(you)(you)線(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)不(bu)適(shi)合在(zai)(zai)(zai)(zai)戶(hu)外(wai)環(huan)境(jing)使(shi)用(yong)，特(te)別(bie)是在(zai)(zai)(zai)(zai)冬(dong)天(tian)及低風速季(ji)節(jie)(jie)使(shi)用(yong)。雖然無(wu)線(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)也有(you)(you)(you)著(zhu)不(bu)錯的效果。但由(you)于(yu)系(xi)(xi)(xi)統(tong)工(gong)作(zuo)時(shi)(shi)(shi)(shi)會(hui)有(you)(you)(you)一(yi)定(ding)的干擾，使(shi)對(dui)(dui)(dui)(dui)講(jiang)(jiang)(jiang)效果下(xia)降(jiang)，另(ling)外(wai)在(zai)(zai)(zai)(zai)信(xin)號較弱時(shi)(shi)(shi)(shi)對(dui)(dui)(dui)(dui)用(yong)戶(hu)語音(yin)產(chan)生(sheng)(sheng)了(le)(le)影(ying)響(xiang)。特(te)別(bie)是在(zai)(zai)(zai)(zai)人員復雜(za)、通信(xin)距(ju)離較短或需要較長時(shi)(shi)(shi)(shi)間使(shi)用(yong)時(shi)(shi)(shi)(shi)。因(yin)此(ci)，更需要有(you)(you)(you)一(yi)個可靠的無(wu)線(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)提供與有(you)(you)(you)線(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)一(yi)樣(yang)的語音(yin)信(xin)息與控制。無(wu)線(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)具(ju)有(you)(you)(you)很高(gao)的靈活性(xing)，它能夠滿足現場(chang)中(zhong)所有(you)(you)(you)環(huan)境(jing)使(shi)用(yong)需求并能隨時(shi)(shi)(shi)(shi)切換（如在(zai)(zai)(zai)(zai)野外(wai)、戶(hu)外(wai)電話等),用(yong)戶(hu)可以在(zai)(zai)(zai)(zai)任何(he)地點使(shi)用(yong)、隨時(shi)(shi)(shi)(shi)、隨地進行通訊。使(shi)用(yong)方便(bian)、節(jie)(jie)省成本、節(jie)(jie)約費用(yong)。下(xia)面我(wo)們來了(le)(le)解一(yi)下(xia)無(wu)線(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)它主(zhu)要是什么優點？

1.性能穩定，可靠性高(gao)

在相同(tong)無(wu)(wu)(wu)線(xian)(xian)傳輸(shu)距離下，無(wu)(wu)(wu)線(xian)(xian)傳輸(shu)信(xin)號(hao)更(geng)穩定由于(yu)使(shi)(shi)(shi)用了(le)功(gong)率(lv)放大器(qi)來對無(wu)(wu)(wu)線(xian)(xian)信(xin)號(hao)進行壓縮(suo)和放大，使(shi)(shi)(shi)無(wu)(wu)(wu)線(xian)(xian)信(xin)號(hao)更(geng)加(jia)穩定可靠。無(wu)(wu)(wu)線(xian)(xian)信(xin)號(hao)在弱(ruo)電(dian)磁環境下也(ye)能保(bao)持(chi)較好(hao)的(de)性(xing)能。無(wu)(wu)(wu)線(xian)(xian)對講(jiang)系統具有(you)發(fa)射功(gong)率(lv)小、抗千(qian)擾(rao)(rao)能力(li)強(與有(you)線(xian)(xian)對講(jiang)系統比(bi)較)和抗電(dian)磁干(gan)(gan)擾(rao)(rao)能力(li)強(與有(you)線(xian)(xian)對講(jiang)系統比(bi)較)的(de)特點。無(wu)(wu)(wu)線(xian)(xian)對講(jiang)系統發(fa)射信(xin)號(hao)在發(fa)射前和發(fa)射后(hou)均能保(bao)持(chi)良(liang)好(hao)的(de)性(xing)能，使(shi)(shi)(shi)用過程中，發(fa)射信(xin)號(hao)與接收信(xin)號(hao)完全不受任何千(qian)擾(rao)(rao)，可保(bao)持(chi)很好(hao)的(de)穩定性(xing)，具有(you)良(liang)好(hao)的(de)抗千(qian)擾(rao)(rao)性(xing)和抗低(di)頻干(gan)(gan)擾(rao)(rao)能力(li)，即使(shi)(shi)(shi)在惡(e)劣(lie)的(de)環境下也(ye)能保(bao)持(chi)較好(hao)的(de)性(xing)能。因此無(wu)(wu)(wu)線(xian)(xian)系統有(you)較高(gao)的(de)可靠性(xing)。

2.功耗小、不(bu)受天氣、濕度(du)的影響

無(wu)線(xian)對(dui)講系(xi)統(tong)在(zai)不同的(de)(de)(de)環(huan)境中(zhong)，無(wu)線(xian)通(tong)(tong)信(xin)設(she)備和有(you)線(xian)通(tong)(tong)信(xin)設(she)備一樣都要(yao)進行電(dian)(dian)能的(de)(de)(de)消耗(hao)。當環(huan)境溫(wen)度(du)在(zai)-40°C以下時(shi)(shi)，無(wu)線(xian)通(tong)(tong)信(xin)設(she)備需要(yao)每天工作8小時(shi)(shi)左右;當環(huan)境溫(wen)度(du)為-20°C時(shi)(shi)，每天工作8小時(shi)(shi)左右;當環(huan)境溫(wen)度(du)為-30°C時(shi)(shi)，每天工作4小時(shi)(shi)左右。目前市場上(shang)常見的(de)(de)(de)無(wu)線(xian)對(dui)講系(xi)統(tong)有(you)兩種(zhong)(zhong)(zhong)電(dian)(dian)源(yuan)輸入方式(shi)，一種(zhong)(zhong)(zhong)是(shi)電(dian)(dian)源(yuan)輸入，另(ling)一種(zhong)(zhong)(zhong)是(shi)電(dian)(dian)源(yuan)輸出。從(cong)這兩種(zhong)(zhong)(zhong)方式(shi)對(dui)系(xi)統(tong)的(de)(de)(de)功(gong)耗(hao)來看，電(dian)(dian)源(yuan)輸入方式(shi)的(de)(de)(de)功(gong)耗(hao)更大一些，但是(shi)功(gong)耗(hao)很(hen)小。并且設(she)備的(de)(de)(de)工作環(huan)境不同，對(dui)電(dian)(dian)池的(de)(de)(de)需求量也不同，所以功(gong)耗(hao)也不同。

3信號不受干擾

在(zai)一(yi)(yi)些有(you)干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)的(de)(de)地方(fang)，例(li)如(ru)野外、機(ji)場、工廠等，一(yi)(yi)般(ban)采(cai)用(yong)(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)方(fang)式。分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)方(fang)式的(de)(de)抗(kang)干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)能(neng)力(li)不(bu)強，其抗(kang)干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)能(neng)力(li)主要取決于(yu)射頻(pin)(pin)(pin)(pin)(pin)(pin)功率(lv)的(de)(de)大小。分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)技(ji)(ji)術(shu)(shu)的(de)(de)功率(lv)一(yi)(yi)般(ban)是50dB在(zai)50dB左(zuo)右時(shi)，其抗(kang)干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)能(neng)力(li)強。但(dan)由于(yu)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)的(de)(de)干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)與噪聲(主要是周邊噪聲)具有(you)很(hen)強的(de)(de)互通(tong)性，當分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)發(fa)射的(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)超過50dB時(shi)，其抗(kang)千(qian)(qian)擾(rao)(rao)(rao)(rao)(rao)能(neng)力(li)就會減弱。另外，在(zai)一(yi)(yi)些有(you)噪音的(de)(de)環(huan)境中使用(yong)(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)技(ji)(ji)術(shu)(shu)，會使分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)無法(fa)到(dao)達發(fa)射端的(de)(de)接收機(ji)或(huo)者(zhe)造成(cheng)發(fa)射端信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接收端信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)糟合而(er)(er)造成(cheng)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)或(huo)干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)(例(li)如(ru)在(zai)使用(yong)(yong)(yong)(yong)(yong)室外電話(hua)時(shi)) 。而(er)(er)采(cai)用(yong)(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)技(ji)(ji)術(shu)(shu)的(de)(de)無線(xian)對講(jiang)系統由于(yu)發(fa)射功率(lv)小，分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)后的(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)比有(you)線(xian)對講(jiang)系統高(gao)很(hen)多(duo)(在(zai)實(shi)際使用(yong)(yong)(yong)(yong)(yong)中分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)設備一(yi)(yi)般(ban)可以(yi)將(jiang)系統信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)到(dao)50dB以(yi)上),信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)不(bu)受干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)。如(ru)果(guo)采(cai)用(yong)(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)技(ji)(ji)術(shu)(shu)，需要在(zai)較大的(de)(de)回波功率(lv)下才能(neng)實(shi)現(xian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)工作(如(ru)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)器發(fa)射信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接收信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)重疊時(shi)產(chan)生的(de)(de)千(qian)(qian)擾(rao)(rao)(rao)(rao)(rao))和發(fa)送信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)降低(di)(di)(同(tong)頻(pin)(pin)(pin)(pin)(pin)(pin)帶內的(de)(de)兩只天線(xian)對同(tong)一(yi)(yi)信(xin)(xin)(xin)(xin)道(dao)傳(chuan)輸的(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)基本(ben)一(yi)(yi)致);如(ru)果(guo)采(cai)用(yong)(yong)(yong)(yong)(yong)混響技(ji)(ji)術(shu)(shu)，則可以(yi)實(shi)現(xian)對無線(xian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)干(gan)(gan)擾(rao)(rao)(rao)(rao)(rao)的(de)(de)抑制或(huo)降低(di)(di)。