由于在(zai)(zai)戶外(wai)(wai)、室內等區(qu)域，無線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)(jiang)系(xi)統(tong)(tong)的(de)(de)(de)(de)信號強度較(jiao)(jiao)弱，而且(qie)采(cai)用(yong)(yong)(yong)頻(pin)率調(diao)制(zhi)技術（如 MHZ、 NMR、 BSI等）產(chan)生(sheng)的(de)(de)(de)(de)信號傳(chuan)輸(shu)時(shi)(shi)延大(da)，傳(chuan)輸(shu)距離遠。因(yin)此有(you)線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)(jiang)系(xi)統(tong)(tong)不適合在(zai)(zai)戶外(wai)(wai)環(huan)(huan)境使(shi)(shi)用(yong)(yong)(yong)，特(te)別是在(zai)(zai)冬(dong)天(tian)及低風(feng)速季節(jie)(jie)使(shi)(shi)用(yong)(yong)(yong)。雖然(ran)無線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)(jiang)系(xi)統(tong)(tong)也有(you)著不錯的(de)(de)(de)(de)效(xiao)果。但由于系(xi)統(tong)(tong)工作(zuo)時(shi)(shi)會有(you)一定的(de)(de)(de)(de)干擾，使(shi)(shi)對(dui)講(jiang)(jiang)(jiang)(jiang)效(xiao)果下降(jiang)，另外(wai)(wai)在(zai)(zai)信號較(jiao)(jiao)弱時(shi)(shi)對(dui)用(yong)(yong)(yong)戶語(yu)音產(chan)生(sheng)了影響。特(te)別是在(zai)(zai)人員復雜、通(tong)信距離較(jiao)(jiao)短或需要較(jiao)(jiao)長時(shi)(shi)間使(shi)(shi)用(yong)(yong)(yong)時(shi)(shi)。因(yin)此，更需要有(you)一個可(ke)靠的(de)(de)(de)(de)無線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)(jiang)系(xi)統(tong)(tong)提(ti)供(gong)與有(you)線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)(jiang)系(xi)統(tong)(tong)一樣的(de)(de)(de)(de)語(yu)音信息與控制(zhi)。無線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)(jiang)系(xi)統(tong)(tong)具有(you)很高的(de)(de)(de)(de)靈活性(xing)，它能(neng)夠滿足現場中所有(you)環(huan)(huan)境使(shi)(shi)用(yong)(yong)(yong)需求(qiu)并能(neng)隨(sui)時(shi)(shi)切換（如在(zai)(zai)野(ye)外(wai)(wai)、戶外(wai)(wai)電話等),用(yong)(yong)(yong)戶可(ke)以在(zai)(zai)任何地點(dian)使(shi)(shi)用(yong)(yong)(yong)、隨(sui)時(shi)(shi)、隨(sui)地進行通(tong)訊(xun)。使(shi)(shi)用(yong)(yong)(yong)方(fang)便、節(jie)(jie)省成本、節(jie)(jie)約費用(yong)(yong)(yong)。下面(mian)我們來了解一下無線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)(jiang)系(xi)統(tong)(tong)它主(zhu)要是什么優點(dian)？

1.性(xing)(xing)能穩定，可靠性(xing)(xing)高(gao)

在(zai)(zai)相同無(wu)(wu)線(xian)(xian)(xian)(xian)傳輸距離下(xia)，無(wu)(wu)線(xian)(xian)(xian)(xian)傳輸信(xin)號(hao)更穩定由于使(shi)(shi)用了功(gong)率放大器來對(dui)(dui)無(wu)(wu)線(xian)(xian)(xian)(xian)信(xin)號(hao)進行壓縮和(he)放大，使(shi)(shi)無(wu)(wu)線(xian)(xian)(xian)(xian)信(xin)號(hao)更加穩定可靠(kao)。無(wu)(wu)線(xian)(xian)(xian)(xian)信(xin)號(hao)在(zai)(zai)弱電磁環(huan)境下(xia)也(ye)能(neng)(neng)(neng)(neng)保(bao)持較(jiao)(jiao)(jiao)(jiao)好的(de)(de)(de)性(xing)(xing)能(neng)(neng)(neng)(neng)。無(wu)(wu)線(xian)(xian)(xian)(xian)對(dui)(dui)講(jiang)(jiang)系統具有(you)發(fa)(fa)射功(gong)率小、抗(kang)千擾(rao)能(neng)(neng)(neng)(neng)力強(與(yu)有(you)線(xian)(xian)(xian)(xian)對(dui)(dui)講(jiang)(jiang)系統比較(jiao)(jiao)(jiao)(jiao))和(he)抗(kang)電磁干擾(rao)能(neng)(neng)(neng)(neng)力強(與(yu)有(you)線(xian)(xian)(xian)(xian)對(dui)(dui)講(jiang)(jiang)系統比較(jiao)(jiao)(jiao)(jiao))的(de)(de)(de)特點。無(wu)(wu)線(xian)(xian)(xian)(xian)對(dui)(dui)講(jiang)(jiang)系統發(fa)(fa)射信(xin)號(hao)在(zai)(zai)發(fa)(fa)射前(qian)和(he)發(fa)(fa)射后均能(neng)(neng)(neng)(neng)保(bao)持良(liang)好的(de)(de)(de)性(xing)(xing)能(neng)(neng)(neng)(neng)，使(shi)(shi)用過程中(zhong)，發(fa)(fa)射信(xin)號(hao)與(yu)接收信(xin)號(hao)完全不受任何千擾(rao)，可保(bao)持很(hen)好的(de)(de)(de)穩定性(xing)(xing)，具有(you)良(liang)好的(de)(de)(de)抗(kang)千擾(rao)性(xing)(xing)和(he)抗(kang)低(di)頻干擾(rao)能(neng)(neng)(neng)(neng)力，即(ji)使(shi)(shi)在(zai)(zai)惡劣的(de)(de)(de)環(huan)境下(xia)也(ye)能(neng)(neng)(neng)(neng)保(bao)持較(jiao)(jiao)(jiao)(jiao)好的(de)(de)(de)性(xing)(xing)能(neng)(neng)(neng)(neng)。因此無(wu)(wu)線(xian)(xian)(xian)(xian)系統有(you)較(jiao)(jiao)(jiao)(jiao)高的(de)(de)(de)可靠(kao)性(xing)(xing)。

2.功耗(hao)小、不受天氣、濕度的影響(xiang)

無(wu)(wu)線(xian)(xian)(xian)對(dui)講系(xi)(xi)統在(zai)不(bu)同的(de)環(huan)境(jing)中(zhong)，無(wu)(wu)線(xian)(xian)(xian)通信設(she)備(bei)(bei)(bei)和有(you)線(xian)(xian)(xian)通信設(she)備(bei)(bei)(bei)一(yi)樣都要進(jin)行電(dian)(dian)能的(de)消耗(hao)(hao)。當(dang)環(huan)境(jing)溫(wen)度(du)在(zai)-40°C以(yi)下時(shi)(shi)(shi)，無(wu)(wu)線(xian)(xian)(xian)通信設(she)備(bei)(bei)(bei)需要每天(tian)工作(zuo)8小時(shi)(shi)(shi)左右;當(dang)環(huan)境(jing)溫(wen)度(du)為(wei)-20°C時(shi)(shi)(shi)，每天(tian)工作(zuo)8小時(shi)(shi)(shi)左右;當(dang)環(huan)境(jing)溫(wen)度(du)為(wei)-30°C時(shi)(shi)(shi)，每天(tian)工作(zuo)4小時(shi)(shi)(shi)左右。目(mu)前市場上(shang)常見的(de)無(wu)(wu)線(xian)(xian)(xian)對(dui)講系(xi)(xi)統有(you)兩種電(dian)(dian)源輸(shu)入(ru)方式，一(yi)種是(shi)電(dian)(dian)源輸(shu)入(ru)，另一(yi)種是(shi)電(dian)(dian)源輸(shu)出。從(cong)這兩種方式對(dui)系(xi)(xi)統的(de)功(gong)(gong)耗(hao)(hao)來看(kan)，電(dian)(dian)源輸(shu)入(ru)方式的(de)功(gong)(gong)耗(hao)(hao)更大一(yi)些，但是(shi)功(gong)(gong)耗(hao)(hao)很小。并且(qie)設(she)備(bei)(bei)(bei)的(de)工作(zuo)環(huan)境(jing)不(bu)同，對(dui)電(dian)(dian)池(chi)的(de)需求量也不(bu)同，所以(yi)功(gong)(gong)耗(hao)(hao)也不(bu)同。

3信號不受干擾

在(zai)(zai)(zai)一(yi)些有(you)(you)(you)(you)干擾(rao)的(de)地(di)方(fang)，例如(ru)野外、機場(chang)、工(gong)廠等(deng)，一(yi)般(ban)(ban)采(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)方(fang)式。分(fen)(fen)(fen)(fen)頻(pin)(pin)方(fang)式的(de)抗干擾(rao)能(neng)(neng)(neng)力(li)不(bu)強(qiang)(qiang)(qiang)，其抗干擾(rao)能(neng)(neng)(neng)力(li)主(zhu)要取決于(yu)(yu)射(she)頻(pin)(pin)功率(lv)(lv)的(de)大(da)小。分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)的(de)功率(lv)(lv)一(yi)般(ban)(ban)是50dB在(zai)(zai)(zai)50dB左右時，其抗干擾(rao)能(neng)(neng)(neng)力(li)強(qiang)(qiang)(qiang)。但由于(yu)(yu)分(fen)(fen)(fen)(fen)頻(pin)(pin)的(de)干擾(rao)與噪聲(主(zhu)要是周邊噪聲)具有(you)(you)(you)(you)很強(qiang)(qiang)(qiang)的(de)互(hu)通性，當分(fen)(fen)(fen)(fen)頻(pin)(pin)發(fa)射(she)的(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)超過50dB時，其抗千(qian)(qian)擾(rao)能(neng)(neng)(neng)力(li)就會減弱。另外，在(zai)(zai)(zai)一(yi)些有(you)(you)(you)(you)噪音(yin)的(de)環(huan)境中使(shi)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)，會使(shi)分(fen)(fen)(fen)(fen)頻(pin)(pin)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)無(wu)(wu)法(fa)到達發(fa)射(she)端的(de)接收機或者(zhe)造(zao)成發(fa)射(she)端信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接收端信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)糟合(he)而造(zao)成分(fen)(fen)(fen)(fen)頻(pin)(pin)或干擾(rao)(例如(ru)在(zai)(zai)(zai)使(shi)用(yong)(yong)室外電話時) 。而采(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)的(de)無(wu)(wu)線對講(jiang)系(xi)統(tong)由于(yu)(yu)發(fa)射(she)功率(lv)(lv)小，分(fen)(fen)(fen)(fen)頻(pin)(pin)后的(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)(qiang)度比有(you)(you)(you)(you)線對講(jiang)系(xi)統(tong)高很多(在(zai)(zai)(zai)實(shi)際(ji)使(shi)用(yong)(yong)中分(fen)(fen)(fen)(fen)頻(pin)(pin)設備一(yi)般(ban)(ban)可(ke)以(yi)將(jiang)系(xi)統(tong)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)(fen)(fen)頻(pin)(pin)到50dB以(yi)上),信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)不(bu)受干擾(rao)。如(ru)果采(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)，需要在(zai)(zai)(zai)較大(da)的(de)回波功率(lv)(lv)下才(cai)能(neng)(neng)(neng)實(shi)現信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)分(fen)(fen)(fen)(fen)頻(pin)(pin)工(gong)作(如(ru)分(fen)(fen)(fen)(fen)頻(pin)(pin)器(qi)發(fa)射(she)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接收信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)重疊時產(chan)生(sheng)的(de)千(qian)(qian)擾(rao))和發(fa)送(song)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)(qiang)度降(jiang)(jiang)低(同頻(pin)(pin)帶內的(de)兩只天(tian)線對同一(yi)信(xin)(xin)(xin)(xin)(xin)(xin)道(dao)傳輸的(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)(qiang)度基(ji)本一(yi)致);如(ru)果采(cai)用(yong)(yong)混響(xiang)技(ji)術(shu)，則可(ke)以(yi)實(shi)現對無(wu)(wu)線信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)干擾(rao)的(de)抑制或降(jiang)(jiang)低。