由于(yu)在(zai)(zai)戶外(wai)、室內等(deng)區(qu)域，無線(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)的(de)(de)(de)信(xin)號(hao)強度較(jiao)弱，而且采用(yong)(yong)頻率調制技(ji)術（如 MHZ、 NMR、 BSI等(deng)）產(chan)(chan)生的(de)(de)(de)信(xin)號(hao)傳輸時(shi)(shi)(shi)(shi)延大，傳輸距離(li)遠。因(yin)此(ci)有(you)(you)(you)線(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)不適合在(zai)(zai)戶外(wai)環境(jing)使(shi)(shi)用(yong)(yong)，特別(bie)是(shi)(shi)在(zai)(zai)冬天及(ji)低風速(su)季(ji)節使(shi)(shi)用(yong)(yong)。雖然無線(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)也有(you)(you)(you)著(zhu)不錯的(de)(de)(de)效果。但由于(yu)系(xi)統(tong)工作時(shi)(shi)(shi)(shi)會(hui)有(you)(you)(you)一定的(de)(de)(de)干擾(rao)，使(shi)(shi)對(dui)講(jiang)(jiang)(jiang)效果下降(jiang)，另外(wai)在(zai)(zai)信(xin)號(hao)較(jiao)弱時(shi)(shi)(shi)(shi)對(dui)用(yong)(yong)戶語音產(chan)(chan)生了影響(xiang)。特別(bie)是(shi)(shi)在(zai)(zai)人員復雜、通信(xin)距離(li)較(jiao)短或需要較(jiao)長(chang)時(shi)(shi)(shi)(shi)間使(shi)(shi)用(yong)(yong)時(shi)(shi)(shi)(shi)。因(yin)此(ci)，更需要有(you)(you)(you)一個(ge)可靠(kao)的(de)(de)(de)無線(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)提供與有(you)(you)(you)線(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)一樣的(de)(de)(de)語音信(xin)息與控制。無線(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)具有(you)(you)(you)很高的(de)(de)(de)靈活性，它能(neng)(neng)夠(gou)滿(man)足現(xian)場中所有(you)(you)(you)環境(jing)使(shi)(shi)用(yong)(yong)需求并能(neng)(neng)隨(sui)時(shi)(shi)(shi)(shi)切換（如在(zai)(zai)野外(wai)、戶外(wai)電話等(deng)),用(yong)(yong)戶可以在(zai)(zai)任(ren)何地(di)點使(shi)(shi)用(yong)(yong)、隨(sui)時(shi)(shi)(shi)(shi)、隨(sui)地(di)進行通訊。使(shi)(shi)用(yong)(yong)方便、節省成本(ben)、節約費用(yong)(yong)。下面我們(men)來了解(jie)一下無線(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)它主要是(shi)(shi)什(shen)么優點？

1.性(xing)能穩定(ding)，可(ke)靠性(xing)高

在(zai)相(xiang)同無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)傳輸距離下(xia)(xia)(xia)，無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)傳輸信(xin)號(hao)(hao)更(geng)穩定(ding)由(you)于使(shi)(shi)用(yong)了功(gong)率(lv)放(fang)大(da)器來對無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)(hao)進行壓縮和(he)放(fang)大(da)，使(shi)(shi)無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)(hao)更(geng)加穩定(ding)可(ke)靠。無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)號(hao)(hao)在(zai)弱電磁環(huan)境下(xia)(xia)(xia)也(ye)能(neng)保持(chi)較(jiao)(jiao)(jiao)(jiao)(jiao)好(hao)的(de)性(xing)能(neng)。無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)對講(jiang)(jiang)系(xi)統(tong)具有發(fa)射功(gong)率(lv)小、抗(kang)千(qian)擾(rao)能(neng)力強(與(yu)有線(xian)(xian)(xian)對講(jiang)(jiang)系(xi)統(tong)比較(jiao)(jiao)(jiao)(jiao)(jiao))和(he)抗(kang)電磁干(gan)(gan)擾(rao)能(neng)力強(與(yu)有線(xian)(xian)(xian)對講(jiang)(jiang)系(xi)統(tong)比較(jiao)(jiao)(jiao)(jiao)(jiao))的(de)特點。無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)對講(jiang)(jiang)系(xi)統(tong)發(fa)射信(xin)號(hao)(hao)在(zai)發(fa)射前(qian)和(he)發(fa)射后均能(neng)保持(chi)良好(hao)的(de)性(xing)能(neng)，使(shi)(shi)用(yong)過(guo)程中，發(fa)射信(xin)號(hao)(hao)與(yu)接收信(xin)號(hao)(hao)完全不受任何千(qian)擾(rao)，可(ke)保持(chi)很好(hao)的(de)穩定(ding)性(xing)，具有良好(hao)的(de)抗(kang)千(qian)擾(rao)性(xing)和(he)抗(kang)低(di)頻干(gan)(gan)擾(rao)能(neng)力，即使(shi)(shi)在(zai)惡劣的(de)環(huan)境下(xia)(xia)(xia)也(ye)能(neng)保持(chi)較(jiao)(jiao)(jiao)(jiao)(jiao)好(hao)的(de)性(xing)能(neng)。因(yin)此無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)系(xi)統(tong)有較(jiao)(jiao)(jiao)(jiao)(jiao)高的(de)可(ke)靠性(xing)。

2.功耗小、不受(shou)天氣、濕(shi)度的影(ying)響

無(wu)(wu)線(xian)對(dui)講系統在不同(tong)(tong)的(de)(de)(de)環(huan)境(jing)中，無(wu)(wu)線(xian)通(tong)信(xin)設備(bei)(bei)(bei)和有線(xian)通(tong)信(xin)設備(bei)(bei)(bei)一樣都要進行電(dian)能的(de)(de)(de)消耗(hao)(hao)(hao)。當環(huan)境(jing)溫(wen)度在-40°C以下時，無(wu)(wu)線(xian)通(tong)信(xin)設備(bei)(bei)(bei)需(xu)(xu)要每(mei)天工作(zuo)8小時左(zuo)右;當環(huan)境(jing)溫(wen)度為(wei)-20°C時，每(mei)天工作(zuo)8小時左(zuo)右;當環(huan)境(jing)溫(wen)度為(wei)-30°C時，每(mei)天工作(zuo)4小時左(zuo)右。目(mu)前市場上常見的(de)(de)(de)無(wu)(wu)線(xian)對(dui)講系統有兩種(zhong)(zhong)電(dian)源(yuan)輸入(ru)方式，一種(zhong)(zhong)是(shi)電(dian)源(yuan)輸入(ru)，另一種(zhong)(zhong)是(shi)電(dian)源(yuan)輸出。從這(zhe)兩種(zhong)(zhong)方式對(dui)系統的(de)(de)(de)功(gong)耗(hao)(hao)(hao)來看，電(dian)源(yuan)輸入(ru)方式的(de)(de)(de)功(gong)耗(hao)(hao)(hao)更大(da)一些(xie)，但是(shi)功(gong)耗(hao)(hao)(hao)很小。并且設備(bei)(bei)(bei)的(de)(de)(de)工作(zuo)環(huan)境(jing)不同(tong)(tong)，對(dui)電(dian)池的(de)(de)(de)需(xu)(xu)求量也(ye)不同(tong)(tong)，所以功(gong)耗(hao)(hao)(hao)也(ye)不同(tong)(tong)。

3信號不受干擾

在(zai)(zai)一(yi)(yi)些有干(gan)擾(rao)(rao)(rao)(rao)(rao)的(de)(de)(de)(de)(de)(de)地(di)方(fang)，例如(ru)野外、機場、工廠等，一(yi)(yi)般采(cai)用(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)方(fang)式。分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)方(fang)式的(de)(de)(de)(de)(de)(de)抗(kang)干(gan)擾(rao)(rao)(rao)(rao)(rao)能(neng)(neng)力(li)不強(qiang)，其(qi)抗(kang)干(gan)擾(rao)(rao)(rao)(rao)(rao)能(neng)(neng)力(li)主要取(qu)決于射頻(pin)(pin)(pin)功率(lv)的(de)(de)(de)(de)(de)(de)大小。分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu)的(de)(de)(de)(de)(de)(de)功率(lv)一(yi)(yi)般是(shi)50dB在(zai)(zai)50dB左右時(shi)(shi)，其(qi)抗(kang)干(gan)擾(rao)(rao)(rao)(rao)(rao)能(neng)(neng)力(li)強(qiang)。但(dan)由(you)于分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)的(de)(de)(de)(de)(de)(de)干(gan)擾(rao)(rao)(rao)(rao)(rao)與噪聲(主要是(shi)周邊(bian)噪聲)具有很強(qiang)的(de)(de)(de)(de)(de)(de)互通(tong)性，當分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)發(fa)射的(de)(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)超過50dB時(shi)(shi)，其(qi)抗(kang)千擾(rao)(rao)(rao)(rao)(rao)能(neng)(neng)力(li)就會減弱。另外，在(zai)(zai)一(yi)(yi)些有噪音的(de)(de)(de)(de)(de)(de)環境中使(shi)(shi)用(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu)，會使(shi)(shi)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)無(wu)法到達發(fa)射端的(de)(de)(de)(de)(de)(de)接收(shou)機或(huo)者造成(cheng)發(fa)射端信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)與接收(shou)端信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)(de)(de)糟合而造成(cheng)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)或(huo)干(gan)擾(rao)(rao)(rao)(rao)(rao)(例如(ru)在(zai)(zai)使(shi)(shi)用(yong)室外電話時(shi)(shi)) 。而采(cai)用(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu)的(de)(de)(de)(de)(de)(de)無(wu)線對講(jiang)系(xi)統由(you)于發(fa)射功率(lv)小，分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)后的(de)(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)度比有線對講(jiang)系(xi)統高(gao)很多(duo)(在(zai)(zai)實(shi)際使(shi)(shi)用(yong)中分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)設(she)備一(yi)(yi)般可(ke)以(yi)將系(xi)統信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)到50dB以(yi)上(shang)),信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)不受干(gan)擾(rao)(rao)(rao)(rao)(rao)。如(ru)果采(cai)用(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu)，需要在(zai)(zai)較大的(de)(de)(de)(de)(de)(de)回波(bo)功率(lv)下(xia)才(cai)能(neng)(neng)實(shi)現(xian)(xian)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)(de)(de)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)工作(如(ru)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)器(qi)發(fa)射信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)與接收(shou)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)重疊時(shi)(shi)產生的(de)(de)(de)(de)(de)(de)千擾(rao)(rao)(rao)(rao)(rao))和發(fa)送(song)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)度降低(同(tong)頻(pin)(pin)(pin)帶內的(de)(de)(de)(de)(de)(de)兩只(zhi)天線對同(tong)一(yi)(yi)信(xin)(xin)(xin)(xin)(xin)(xin)道傳輸的(de)(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)度基本一(yi)(yi)致);如(ru)果采(cai)用(yong)混響(xiang)技(ji)術(shu)，則可(ke)以(yi)實(shi)現(xian)(xian)對無(wu)線信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)干(gan)擾(rao)(rao)(rao)(rao)(rao)的(de)(de)(de)(de)(de)(de)抑制或(huo)降低。