由于在戶(hu)(hu)外(wai)、室內等區域，無線(xian)對(dui)講(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)的(de)信(xin)(xin)號強度(du)較(jiao)(jiao)弱，而且采用(yong)(yong)頻率調(diao)制技術（如 MHZ、 NMR、 BSI等）產(chan)生的(de)信(xin)(xin)號傳輸時延大，傳輸距(ju)離遠。因此有(you)線(xian)對(dui)講(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)不適合在戶(hu)(hu)外(wai)環境(jing)使(shi)用(yong)(yong)，特(te)別是在冬天(tian)及低風速季節使(shi)用(yong)(yong)。雖然無線(xian)對(dui)講(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)也有(you)著(zhu)不錯的(de)效果。但由于系(xi)(xi)(xi)統(tong)(tong)工作時會(hui)有(you)一定的(de)干擾，使(shi)對(dui)講(jiang)(jiang)效果下(xia)降，另外(wai)在信(xin)(xin)號較(jiao)(jiao)弱時對(dui)用(yong)(yong)戶(hu)(hu)語音(yin)產(chan)生了(le)影響。特(te)別是在人員復雜、通信(xin)(xin)距(ju)離較(jiao)(jiao)短或需要(yao)(yao)較(jiao)(jiao)長時間使(shi)用(yong)(yong)時。因此，更需要(yao)(yao)有(you)一個可靠的(de)無線(xian)對(dui)講(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)提供與有(you)線(xian)對(dui)講(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)一樣的(de)語音(yin)信(xin)(xin)息與控制。無線(xian)對(dui)講(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)具有(you)很高的(de)靈(ling)活性，它(ta)能夠滿足(zu)現(xian)場中所有(you)環境(jing)使(shi)用(yong)(yong)需求并能隨(sui)時切換（如在野外(wai)、戶(hu)(hu)外(wai)電話(hua)等),用(yong)(yong)戶(hu)(hu)可以(yi)在任何地點(dian)使(shi)用(yong)(yong)、隨(sui)時、隨(sui)地進(jin)行通訊。使(shi)用(yong)(yong)方便、節省成本、節約(yue)費用(yong)(yong)。下(xia)面我們來了(le)解一下(xia)無線(xian)對(dui)講(jiang)(jiang)系(xi)(xi)(xi)統(tong)(tong)它(ta)主要(yao)(yao)是什么優點(dian)？

1.性(xing)能穩(wen)定，可靠(kao)性(xing)高

在相同無(wu)(wu)(wu)線(xian)(xian)傳輸距離下(xia)，無(wu)(wu)(wu)線(xian)(xian)傳輸信(xin)(xin)號(hao)(hao)更穩(wen)定由于使用了功(gong)率放大(da)器來對無(wu)(wu)(wu)線(xian)(xian)信(xin)(xin)號(hao)(hao)進行壓縮和放大(da)，使無(wu)(wu)(wu)線(xian)(xian)信(xin)(xin)號(hao)(hao)更加穩(wen)定可靠。無(wu)(wu)(wu)線(xian)(xian)信(xin)(xin)號(hao)(hao)在弱電(dian)磁環境(jing)下(xia)也能(neng)(neng)保(bao)持(chi)較(jiao)(jiao)好(hao)的(de)(de)性(xing)(xing)能(neng)(neng)。無(wu)(wu)(wu)線(xian)(xian)對講系(xi)(xi)統(tong)(tong)具有(you)發射功(gong)率小、抗千(qian)擾能(neng)(neng)力(li)強(與(yu)有(you)線(xian)(xian)對講系(xi)(xi)統(tong)(tong)比較(jiao)(jiao))和抗電(dian)磁干擾能(neng)(neng)力(li)強(與(yu)有(you)線(xian)(xian)對講系(xi)(xi)統(tong)(tong)比較(jiao)(jiao))的(de)(de)特點。無(wu)(wu)(wu)線(xian)(xian)對講系(xi)(xi)統(tong)(tong)發射信(xin)(xin)號(hao)(hao)在發射前和發射后均能(neng)(neng)保(bao)持(chi)良好(hao)的(de)(de)性(xing)(xing)能(neng)(neng)，使用過程(cheng)中(zhong)，發射信(xin)(xin)號(hao)(hao)與(yu)接收信(xin)(xin)號(hao)(hao)完全(quan)不受任何(he)千(qian)擾，可保(bao)持(chi)很好(hao)的(de)(de)穩(wen)定性(xing)(xing)，具有(you)良好(hao)的(de)(de)抗千(qian)擾性(xing)(xing)和抗低頻干擾能(neng)(neng)力(li)，即使在惡劣的(de)(de)環境(jing)下(xia)也能(neng)(neng)保(bao)持(chi)較(jiao)(jiao)好(hao)的(de)(de)性(xing)(xing)能(neng)(neng)。因此無(wu)(wu)(wu)線(xian)(xian)系(xi)(xi)統(tong)(tong)有(you)較(jiao)(jiao)高(gao)的(de)(de)可靠性(xing)(xing)。

2.功耗小(xiao)、不受天(tian)氣、濕度的(de)影響

無(wu)(wu)線(xian)對(dui)講(jiang)系(xi)統在不(bu)同的(de)(de)(de)(de)環(huan)(huan)境(jing)(jing)中，無(wu)(wu)線(xian)通(tong)信(xin)設備(bei)和有線(xian)通(tong)信(xin)設備(bei)一樣都要進(jin)行電能(neng)的(de)(de)(de)(de)消耗(hao)。當環(huan)(huan)境(jing)(jing)溫(wen)度在-40°C以(yi)下(xia)時(shi)，無(wu)(wu)線(xian)通(tong)信(xin)設備(bei)需要每天工作8小時(shi)左右;當環(huan)(huan)境(jing)(jing)溫(wen)度為-20°C時(shi)，每天工作8小時(shi)左右;當環(huan)(huan)境(jing)(jing)溫(wen)度為-30°C時(shi)，每天工作4小時(shi)左右。目前市場上常見的(de)(de)(de)(de)無(wu)(wu)線(xian)對(dui)講(jiang)系(xi)統有兩(liang)種(zhong)(zhong)電源輸入方式(shi)(shi)，一種(zhong)(zhong)是(shi)(shi)電源輸入，另一種(zhong)(zhong)是(shi)(shi)電源輸出。從這(zhe)兩(liang)種(zhong)(zhong)方式(shi)(shi)對(dui)系(xi)統的(de)(de)(de)(de)功耗(hao)來看，電源輸入方式(shi)(shi)的(de)(de)(de)(de)功耗(hao)更(geng)大(da)一些，但是(shi)(shi)功耗(hao)很(hen)小。并(bing)且設備(bei)的(de)(de)(de)(de)工作環(huan)(huan)境(jing)(jing)不(bu)同，對(dui)電池的(de)(de)(de)(de)需求量(liang)也(ye)不(bu)同，所以(yi)功耗(hao)也(ye)不(bu)同。

3信號不受干擾

在一(yi)(yi)些(xie)有(you)干(gan)擾(rao)的(de)(de)(de)地方，例如野外、機(ji)場、工(gong)廠等，一(yi)(yi)般(ban)采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)方式。分(fen)(fen)(fen)頻(pin)(pin)方式的(de)(de)(de)抗(kang)干(gan)擾(rao)能(neng)力(li)不強，其(qi)抗(kang)干(gan)擾(rao)能(neng)力(li)主要(yao)取決于(yu)射(she)(she)頻(pin)(pin)功(gong)率的(de)(de)(de)大小。分(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)(shu)的(de)(de)(de)功(gong)率一(yi)(yi)般(ban)是50dB在50dB左右時，其(qi)抗(kang)干(gan)擾(rao)能(neng)力(li)強。但由(you)于(yu)分(fen)(fen)(fen)頻(pin)(pin)的(de)(de)(de)干(gan)擾(rao)與噪(zao)聲(sheng)(主要(yao)是周邊噪(zao)聲(sheng))具有(you)很強的(de)(de)(de)互通性，當分(fen)(fen)(fen)頻(pin)(pin)發射(she)(she)的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)超過50dB時，其(qi)抗(kang)千擾(rao)能(neng)力(li)就(jiu)會(hui)減弱(ruo)。另(ling)外，在一(yi)(yi)些(xie)有(you)噪(zao)音的(de)(de)(de)環境中使用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)(shu)，會(hui)使分(fen)(fen)(fen)頻(pin)(pin)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)無法到達發射(she)(she)端的(de)(de)(de)接收(shou)機(ji)或(huo)者造(zao)成(cheng)(cheng)發射(she)(she)端信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接收(shou)端信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)糟(zao)合而造(zao)成(cheng)(cheng)分(fen)(fen)(fen)頻(pin)(pin)或(huo)干(gan)擾(rao)(例如在使用(yong)(yong)室外電話時) 。而采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)(shu)的(de)(de)(de)無線(xian)(xian)對講(jiang)系統(tong)由(you)于(yu)發射(she)(she)功(gong)率小，分(fen)(fen)(fen)頻(pin)(pin)后的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)比有(you)線(xian)(xian)對講(jiang)系統(tong)高很多(在實際使用(yong)(yong)中分(fen)(fen)(fen)頻(pin)(pin)設(she)備一(yi)(yi)般(ban)可以將系統(tong)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)(fen)頻(pin)(pin)到50dB以上(shang)),信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)不受干(gan)擾(rao)。如果(guo)采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)(shu)，需要(yao)在較(jiao)大的(de)(de)(de)回(hui)波(bo)功(gong)率下才能(neng)實現(xian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)分(fen)(fen)(fen)頻(pin)(pin)工(gong)作(如分(fen)(fen)(fen)頻(pin)(pin)器發射(she)(she)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接收(shou)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)重疊時產生的(de)(de)(de)千擾(rao))和發送(song)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)降(jiang)低(同(tong)(tong)頻(pin)(pin)帶內(nei)的(de)(de)(de)兩只(zhi)天線(xian)(xian)對同(tong)(tong)一(yi)(yi)信(xin)(xin)(xin)(xin)道傳輸(shu)的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)基本一(yi)(yi)致);如果(guo)采(cai)用(yong)(yong)混響技(ji)術(shu)(shu)，則可以實現(xian)對無線(xian)(xian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)干(gan)擾(rao)的(de)(de)(de)抑制或(huo)降(jiang)低。