由于(yu)在(zai)(zai)戶(hu)外(wai)、室內等區域，無(wu)(wu)(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)的(de)(de)(de)信(xin)(xin)號(hao)強(qiang)度較(jiao)弱，而且采用(yong)(yong)(yong)頻率調制技術（如(ru) MHZ、 NMR、 BSI等）產(chan)生的(de)(de)(de)信(xin)(xin)號(hao)傳(chuan)輸(shu)時(shi)延大，傳(chuan)輸(shu)距離(li)遠。因(yin)此(ci)有(you)(you)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)不適合(he)在(zai)(zai)戶(hu)外(wai)環境使(shi)(shi)用(yong)(yong)(yong)，特(te)(te)別是(shi)在(zai)(zai)冬天及低(di)風速季節使(shi)(shi)用(yong)(yong)(yong)。雖然無(wu)(wu)(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)也有(you)(you)著(zhu)不錯的(de)(de)(de)效果。但由于(yu)系(xi)(xi)統(tong)(tong)工作時(shi)會有(you)(you)一定的(de)(de)(de)干擾(rao)，使(shi)(shi)對(dui)講(jiang)效果下降，另外(wai)在(zai)(zai)信(xin)(xin)號(hao)較(jiao)弱時(shi)對(dui)用(yong)(yong)(yong)戶(hu)語(yu)音產(chan)生了(le)影響。特(te)(te)別是(shi)在(zai)(zai)人員復雜、通(tong)信(xin)(xin)距離(li)較(jiao)短或(huo)需(xu)要較(jiao)長時(shi)間使(shi)(shi)用(yong)(yong)(yong)時(shi)。因(yin)此(ci)，更需(xu)要有(you)(you)一個可靠(kao)的(de)(de)(de)無(wu)(wu)(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)提供與有(you)(you)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)一樣的(de)(de)(de)語(yu)音信(xin)(xin)息與控制。無(wu)(wu)(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)具有(you)(you)很(hen)高的(de)(de)(de)靈(ling)活性，它能夠滿足現(xian)場中(zhong)所有(you)(you)環境使(shi)(shi)用(yong)(yong)(yong)需(xu)求并能隨時(shi)切換（如(ru)在(zai)(zai)野外(wai)、戶(hu)外(wai)電話(hua)等),用(yong)(yong)(yong)戶(hu)可以在(zai)(zai)任何地點使(shi)(shi)用(yong)(yong)(yong)、隨時(shi)、隨地進行通(tong)訊。使(shi)(shi)用(yong)(yong)(yong)方便、節省(sheng)成本、節約費用(yong)(yong)(yong)。下面我們來了(le)解一下無(wu)(wu)(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)它主(zhu)要是(shi)什(shen)么優點？

1.性(xing)(xing)能穩定，可(ke)靠性(xing)(xing)高

在相同無(wu)(wu)線(xian)(xian)(xian)傳(chuan)(chuan)輸距(ju)離下(xia)，無(wu)(wu)線(xian)(xian)(xian)傳(chuan)(chuan)輸信(xin)(xin)(xin)(xin)號(hao)(hao)更穩定由于(yu)使(shi)用了功(gong)率放大器來(lai)對(dui)無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)(xin)(xin)號(hao)(hao)進行壓縮(suo)和(he)放大，使(shi)無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)(xin)(xin)號(hao)(hao)更加穩定可靠。無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)(xin)(xin)號(hao)(hao)在弱電磁環境(jing)下(xia)也(ye)能(neng)(neng)保持較(jiao)好(hao)的(de)(de)(de)(de)(de)性(xing)能(neng)(neng)。無(wu)(wu)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)統具(ju)有發射(she)功(gong)率小、抗(kang)千擾能(neng)(neng)力(li)(li)強(與(yu)有線(xian)(xian)(xian)對(dui)講(jiang)系(xi)統比較(jiao))和(he)抗(kang)電磁干擾能(neng)(neng)力(li)(li)強(與(yu)有線(xian)(xian)(xian)對(dui)講(jiang)系(xi)統比較(jiao))的(de)(de)(de)(de)(de)特點(dian)。無(wu)(wu)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)統發射(she)信(xin)(xin)(xin)(xin)號(hao)(hao)在發射(she)前和(he)發射(she)后均能(neng)(neng)保持良好(hao)的(de)(de)(de)(de)(de)性(xing)能(neng)(neng)，使(shi)用過程(cheng)中，發射(she)信(xin)(xin)(xin)(xin)號(hao)(hao)與(yu)接(jie)收(shou)信(xin)(xin)(xin)(xin)號(hao)(hao)完全不受任何(he)千擾，可保持很好(hao)的(de)(de)(de)(de)(de)穩定性(xing)，具(ju)有良好(hao)的(de)(de)(de)(de)(de)抗(kang)千擾性(xing)和(he)抗(kang)低(di)頻干擾能(neng)(neng)力(li)(li)，即使(shi)在惡劣的(de)(de)(de)(de)(de)環境(jing)下(xia)也(ye)能(neng)(neng)保持較(jiao)好(hao)的(de)(de)(de)(de)(de)性(xing)能(neng)(neng)。因此無(wu)(wu)線(xian)(xian)(xian)系(xi)統有較(jiao)高的(de)(de)(de)(de)(de)可靠性(xing)。

2.功耗小、不受天氣、濕度的影響

無(wu)(wu)(wu)線對講系統(tong)(tong)在(zai)不同(tong)的(de)環(huan)境中(zhong)，無(wu)(wu)(wu)線通信(xin)設(she)備和有線通信(xin)設(she)備一樣都要進行(xing)電(dian)(dian)(dian)能的(de)消耗。當環(huan)境溫度(du)(du)在(zai)-40°C以(yi)下時(shi)，無(wu)(wu)(wu)線通信(xin)設(she)備需要每天工(gong)(gong)作(zuo)(zuo)8小時(shi)左右;當環(huan)境溫度(du)(du)為-20°C時(shi)，每天工(gong)(gong)作(zuo)(zuo)8小時(shi)左右;當環(huan)境溫度(du)(du)為-30°C時(shi)，每天工(gong)(gong)作(zuo)(zuo)4小時(shi)左右。目(mu)前市(shi)場上常見的(de)無(wu)(wu)(wu)線對講系統(tong)(tong)有兩(liang)種(zhong)電(dian)(dian)(dian)源(yuan)輸入(ru)方(fang)式(shi)，一種(zhong)是電(dian)(dian)(dian)源(yuan)輸入(ru)，另一種(zhong)是電(dian)(dian)(dian)源(yuan)輸出。從這兩(liang)種(zhong)方(fang)式(shi)對系統(tong)(tong)的(de)功(gong)(gong)(gong)耗來看，電(dian)(dian)(dian)源(yuan)輸入(ru)方(fang)式(shi)的(de)功(gong)(gong)(gong)耗更大(da)一些，但(dan)是功(gong)(gong)(gong)耗很(hen)小。并且設(she)備的(de)工(gong)(gong)作(zuo)(zuo)環(huan)境不同(tong)，對電(dian)(dian)(dian)池的(de)需求(qiu)量(liang)也不同(tong)，所以(yi)功(gong)(gong)(gong)耗也不同(tong)。

3信號不受干擾

在一(yi)(yi)些有(you)(you)(you)干(gan)擾(rao)(rao)(rao)(rao)的(de)(de)地(di)方(fang)(fang)(fang)，例(li)如(ru)野外、機場、工廠(chang)等(deng)，一(yi)(yi)般(ban)采(cai)(cai)(cai)用(yong)(yong)(yong)(yong)分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)方(fang)(fang)(fang)式(shi)。分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)方(fang)(fang)(fang)式(shi)的(de)(de)抗(kang)干(gan)擾(rao)(rao)(rao)(rao)能(neng)力不強(qiang)，其(qi)抗(kang)干(gan)擾(rao)(rao)(rao)(rao)能(neng)力主(zhu)(zhu)要取決于射(she)頻(pin)(pin)(pin)(pin)(pin)(pin)功(gong)率的(de)(de)大(da)小。分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)技(ji)術(shu)的(de)(de)功(gong)率一(yi)(yi)般(ban)是50dB在50dB左右時(shi)，其(qi)抗(kang)干(gan)擾(rao)(rao)(rao)(rao)能(neng)力強(qiang)。但(dan)由(you)于分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)的(de)(de)干(gan)擾(rao)(rao)(rao)(rao)與噪聲(主(zhu)(zhu)要是周邊噪聲)具有(you)(you)(you)很(hen)強(qiang)的(de)(de)互通性(xing)，當分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)發(fa)射(she)的(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)超過(guo)50dB時(shi)，其(qi)抗(kang)千擾(rao)(rao)(rao)(rao)能(neng)力就會減弱。另外，在一(yi)(yi)些有(you)(you)(you)噪音的(de)(de)環(huan)境中(zhong)使(shi)用(yong)(yong)(yong)(yong)分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)技(ji)術(shu)，會使(shi)分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)信(xin)(xin)號(hao)(hao)(hao)(hao)無(wu)法到達發(fa)射(she)端的(de)(de)接收(shou)機或者造(zao)成發(fa)射(she)端信(xin)(xin)號(hao)(hao)(hao)(hao)與接收(shou)端信(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)糟合而(er)造(zao)成分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)或干(gan)擾(rao)(rao)(rao)(rao)(例(li)如(ru)在使(shi)用(yong)(yong)(yong)(yong)室(shi)外電話時(shi)) 。而(er)采(cai)(cai)(cai)用(yong)(yong)(yong)(yong)分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)技(ji)術(shu)的(de)(de)無(wu)線(xian)對(dui)講(jiang)(jiang)系(xi)統由(you)于發(fa)射(she)功(gong)率小，分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)后(hou)的(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)度(du)比(bi)有(you)(you)(you)線(xian)對(dui)講(jiang)(jiang)系(xi)統高很(hen)多(在實(shi)(shi)際使(shi)用(yong)(yong)(yong)(yong)中(zhong)分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)設備一(yi)(yi)般(ban)可以將系(xi)統信(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)到50dB以上),信(xin)(xin)號(hao)(hao)(hao)(hao)不受干(gan)擾(rao)(rao)(rao)(rao)。如(ru)果采(cai)(cai)(cai)用(yong)(yong)(yong)(yong)分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)技(ji)術(shu)，需(xu)要在較(jiao)大(da)的(de)(de)回(hui)波(bo)功(gong)率下才能(neng)實(shi)(shi)現信(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)工作(如(ru)分(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)器發(fa)射(she)信(xin)(xin)號(hao)(hao)(hao)(hao)與接收(shou)信(xin)(xin)號(hao)(hao)(hao)(hao)重疊時(shi)產生(sheng)的(de)(de)千擾(rao)(rao)(rao)(rao))和發(fa)送信(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)度(du)降低(同頻(pin)(pin)(pin)(pin)(pin)(pin)帶內(nei)的(de)(de)兩只天線(xian)對(dui)同一(yi)(yi)信(xin)(xin)道傳輸的(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)度(du)基本一(yi)(yi)致);如(ru)果采(cai)(cai)(cai)用(yong)(yong)(yong)(yong)混(hun)響技(ji)術(shu)，則可以實(shi)(shi)現對(dui)無(wu)線(xian)信(xin)(xin)號(hao)(hao)(hao)(hao)干(gan)擾(rao)(rao)(rao)(rao)的(de)(de)抑制或降低。