由(you)于在戶(hu)外、室內(nei)等區域(yu)，無(wu)(wu)線(xian)(xian)對講(jiang)(jiang)系(xi)(xi)(xi)統(tong)的(de)信(xin)號(hao)(hao)強度較(jiao)弱(ruo)，而且(qie)采(cai)用(yong)(yong)頻(pin)率調制技(ji)術（如 MHZ、 NMR、 BSI等）產生(sheng)的(de)信(xin)號(hao)(hao)傳輸(shu)時(shi)(shi)延大，傳輸(shu)距(ju)離遠。因此(ci)(ci)有(you)線(xian)(xian)對講(jiang)(jiang)系(xi)(xi)(xi)統(tong)不(bu)適合在戶(hu)外環(huan)境使用(yong)(yong)，特(te)別(bie)是(shi)(shi)在冬天(tian)及低(di)風速季節使用(yong)(yong)。雖然無(wu)(wu)線(xian)(xian)對講(jiang)(jiang)系(xi)(xi)(xi)統(tong)也有(you)著不(bu)錯的(de)效果。但由(you)于系(xi)(xi)(xi)統(tong)工作(zuo)時(shi)(shi)會(hui)有(you)一(yi)定的(de)干擾，使對講(jiang)(jiang)效果下降，另(ling)外在信(xin)號(hao)(hao)較(jiao)弱(ruo)時(shi)(shi)對用(yong)(yong)戶(hu)語(yu)(yu)音產生(sheng)了影響。特(te)別(bie)是(shi)(shi)在人員復雜、通(tong)信(xin)距(ju)離較(jiao)短或需要較(jiao)長時(shi)(shi)間使用(yong)(yong)時(shi)(shi)。因此(ci)(ci)，更(geng)需要有(you)一(yi)個可(ke)(ke)靠的(de)無(wu)(wu)線(xian)(xian)對講(jiang)(jiang)系(xi)(xi)(xi)統(tong)提供與(yu)有(you)線(xian)(xian)對講(jiang)(jiang)系(xi)(xi)(xi)統(tong)一(yi)樣的(de)語(yu)(yu)音信(xin)息與(yu)控制。無(wu)(wu)線(xian)(xian)對講(jiang)(jiang)系(xi)(xi)(xi)統(tong)具有(you)很高的(de)靈(ling)活(huo)性，它能夠滿足現場中所有(you)環(huan)境使用(yong)(yong)需求并能隨(sui)(sui)時(shi)(shi)切換(huan)（如在野(ye)外、戶(hu)外電話(hua)等),用(yong)(yong)戶(hu)可(ke)(ke)以在任何地點使用(yong)(yong)、隨(sui)(sui)時(shi)(shi)、隨(sui)(sui)地進(jin)行通(tong)訊。使用(yong)(yong)方便、節省成(cheng)本、節約費用(yong)(yong)。下面我們來了解一(yi)下無(wu)(wu)線(xian)(xian)對講(jiang)(jiang)系(xi)(xi)(xi)統(tong)它主要是(shi)(shi)什么優點？

1.性(xing)能穩定，可(ke)靠性(xing)高

在(zai)相(xiang)同無(wu)線(xian)(xian)(xian)傳輸距離下(xia)，無(wu)線(xian)(xian)(xian)傳輸信(xin)號更(geng)穩定由(you)于使(shi)用了功率放(fang)大器來對無(wu)線(xian)(xian)(xian)信(xin)號進行壓縮和(he)放(fang)大，使(shi)無(wu)線(xian)(xian)(xian)信(xin)號更(geng)加穩定可靠。無(wu)線(xian)(xian)(xian)信(xin)號在(zai)弱電磁(ci)環(huan)境下(xia)也能(neng)(neng)保(bao)(bao)持(chi)較(jiao)好(hao)的(de)性(xing)(xing)能(neng)(neng)。無(wu)線(xian)(xian)(xian)對講系(xi)(xi)統(tong)(tong)(tong)具有(you)(you)發(fa)射(she)功率小、抗(kang)千(qian)擾能(neng)(neng)力(li)強(與有(you)(you)線(xian)(xian)(xian)對講系(xi)(xi)統(tong)(tong)(tong)比較(jiao))和(he)抗(kang)電磁(ci)干擾能(neng)(neng)力(li)強(與有(you)(you)線(xian)(xian)(xian)對講系(xi)(xi)統(tong)(tong)(tong)比較(jiao))的(de)特點。無(wu)線(xian)(xian)(xian)對講系(xi)(xi)統(tong)(tong)(tong)發(fa)射(she)信(xin)號在(zai)發(fa)射(she)前和(he)發(fa)射(she)后均能(neng)(neng)保(bao)(bao)持(chi)良(liang)好(hao)的(de)性(xing)(xing)能(neng)(neng)，使(shi)用過程中，發(fa)射(she)信(xin)號與接收信(xin)號完全不受任何千(qian)擾，可保(bao)(bao)持(chi)很好(hao)的(de)穩定性(xing)(xing)，具有(you)(you)良(liang)好(hao)的(de)抗(kang)千(qian)擾性(xing)(xing)和(he)抗(kang)低頻干擾能(neng)(neng)力(li)，即使(shi)在(zai)惡劣(lie)的(de)環(huan)境下(xia)也能(neng)(neng)保(bao)(bao)持(chi)較(jiao)好(hao)的(de)性(xing)(xing)能(neng)(neng)。因(yin)此無(wu)線(xian)(xian)(xian)系(xi)(xi)統(tong)(tong)(tong)有(you)(you)較(jiao)高的(de)可靠性(xing)(xing)。

2.功耗(hao)小、不受天(tian)氣、濕度(du)的影響

無線對(dui)講系統(tong)在不(bu)同(tong)的(de)環(huan)境(jing)中，無線通(tong)信設(she)備和有線通(tong)信設(she)備一樣都要(yao)(yao)進行電能的(de)消耗(hao)(hao)。當環(huan)境(jing)溫度在-40°C以下(xia)時(shi)，無線通(tong)信設(she)備需(xu)要(yao)(yao)每天(tian)工作8小時(shi)左右(you);當環(huan)境(jing)溫度為-20°C時(shi)，每天(tian)工作8小時(shi)左右(you);當環(huan)境(jing)溫度為-30°C時(shi)，每天(tian)工作4小時(shi)左右(you)。目前市場上常見的(de)無線對(dui)講系統(tong)有兩(liang)種(zhong)電源輸(shu)入方(fang)式，一種(zhong)是電源輸(shu)入，另一種(zhong)是電源輸(shu)出。從(cong)這兩(liang)種(zhong)方(fang)式對(dui)系統(tong)的(de)功耗(hao)(hao)來看，電源輸(shu)入方(fang)式的(de)功耗(hao)(hao)更(geng)大一些，但是功耗(hao)(hao)很小。并且(qie)設(she)備的(de)工作環(huan)境(jing)不(bu)同(tong)，對(dui)電池的(de)需(xu)求量(liang)也不(bu)同(tong)，所以功耗(hao)(hao)也不(bu)同(tong)。

3信號不受干擾

在(zai)一(yi)些(xie)有干(gan)(gan)(gan)擾(rao)(rao)的(de)(de)(de)(de)地(di)方，例如(ru)野(ye)外(wai)、機場(chang)、工廠等(deng)，一(yi)般采(cai)用(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)方式(shi)。分(fen)(fen)(fen)頻(pin)方式(shi)的(de)(de)(de)(de)抗(kang)干(gan)(gan)(gan)擾(rao)(rao)能(neng)(neng)力不強，其(qi)抗(kang)干(gan)(gan)(gan)擾(rao)(rao)能(neng)(neng)力主(zhu)要(yao)取(qu)決于(yu)射頻(pin)功(gong)率(lv)的(de)(de)(de)(de)大小(xiao)。分(fen)(fen)(fen)頻(pin)技(ji)(ji)術(shu)(shu)的(de)(de)(de)(de)功(gong)率(lv)一(yi)般是(shi)50dB在(zai)50dB左右時(shi)，其(qi)抗(kang)干(gan)(gan)(gan)擾(rao)(rao)能(neng)(neng)力強。但由于(yu)分(fen)(fen)(fen)頻(pin)的(de)(de)(de)(de)干(gan)(gan)(gan)擾(rao)(rao)與(yu)(yu)噪聲(主(zhu)要(yao)是(shi)周邊噪聲)具有很強的(de)(de)(de)(de)互通性，當分(fen)(fen)(fen)頻(pin)發(fa)射的(de)(de)(de)(de)信(xin)(xin)號(hao)超過50dB時(shi)，其(qi)抗(kang)千擾(rao)(rao)能(neng)(neng)力就會減弱(ruo)。另(ling)外(wai)，在(zai)一(yi)些(xie)有噪音的(de)(de)(de)(de)環(huan)境中(zhong)使(shi)用(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)技(ji)(ji)術(shu)(shu)，會使(shi)分(fen)(fen)(fen)頻(pin)信(xin)(xin)號(hao)無法到達發(fa)射端(duan)的(de)(de)(de)(de)接收(shou)(shou)機或(huo)(huo)者(zhe)造(zao)成發(fa)射端(duan)信(xin)(xin)號(hao)與(yu)(yu)接收(shou)(shou)端(duan)信(xin)(xin)號(hao)的(de)(de)(de)(de)糟(zao)合而造(zao)成分(fen)(fen)(fen)頻(pin)或(huo)(huo)干(gan)(gan)(gan)擾(rao)(rao)(例如(ru)在(zai)使(shi)用(yong)(yong)(yong)(yong)室外(wai)電(dian)話時(shi)) 。而采(cai)用(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)技(ji)(ji)術(shu)(shu)的(de)(de)(de)(de)無線對講(jiang)系統由于(yu)發(fa)射功(gong)率(lv)小(xiao)，分(fen)(fen)(fen)頻(pin)后(hou)的(de)(de)(de)(de)信(xin)(xin)號(hao)強度(du)(du)比(bi)有線對講(jiang)系統高很多(在(zai)實際(ji)使(shi)用(yong)(yong)(yong)(yong)中(zhong)分(fen)(fen)(fen)頻(pin)設備一(yi)般可以(yi)將(jiang)系統信(xin)(xin)號(hao)分(fen)(fen)(fen)頻(pin)到50dB以(yi)上),信(xin)(xin)號(hao)不受干(gan)(gan)(gan)擾(rao)(rao)。如(ru)果(guo)采(cai)用(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)技(ji)(ji)術(shu)(shu)，需要(yao)在(zai)較大的(de)(de)(de)(de)回波功(gong)率(lv)下才能(neng)(neng)實現(xian)信(xin)(xin)號(hao)的(de)(de)(de)(de)分(fen)(fen)(fen)頻(pin)工作(如(ru)分(fen)(fen)(fen)頻(pin)器發(fa)射信(xin)(xin)號(hao)與(yu)(yu)接收(shou)(shou)信(xin)(xin)號(hao)重疊(die)時(shi)產生(sheng)的(de)(de)(de)(de)千擾(rao)(rao))和發(fa)送信(xin)(xin)號(hao)強度(du)(du)降(jiang)低(同(tong)(tong)頻(pin)帶內的(de)(de)(de)(de)兩只天線對同(tong)(tong)一(yi)信(xin)(xin)道傳輸的(de)(de)(de)(de)信(xin)(xin)號(hao)強度(du)(du)基本(ben)一(yi)致(zhi));如(ru)果(guo)采(cai)用(yong)(yong)(yong)(yong)混響技(ji)(ji)術(shu)(shu)，則可以(yi)實現(xian)對無線信(xin)(xin)號(hao)干(gan)(gan)(gan)擾(rao)(rao)的(de)(de)(de)(de)抑(yi)制或(huo)(huo)降(jiang)低。