由于在戶(hu)外(wai)、室內等區域，無(wu)線(xian)對(dui)講系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)的(de)(de)(de)信號強度較弱，而(er)且采用(yong)頻率(lv)調(diao)制技術（如 MHZ、 NMR、 BSI等）產(chan)生(sheng)的(de)(de)(de)信號傳(chuan)輸時(shi)(shi)延大，傳(chuan)輸距離遠(yuan)。因(yin)此(ci)有線(xian)對(dui)講系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)不適(shi)合在戶(hu)外(wai)環(huan)境使(shi)(shi)用(yong)，特別(bie)(bie)是(shi)在冬(dong)天及低風速季節(jie)使(shi)(shi)用(yong)。雖(sui)然無(wu)線(xian)對(dui)講系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)也有著(zhu)不錯的(de)(de)(de)效果。但由于系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)工作時(shi)(shi)會有一(yi)(yi)定的(de)(de)(de)干擾，使(shi)(shi)對(dui)講效果下(xia)降(jiang)，另外(wai)在信號較弱時(shi)(shi)對(dui)用(yong)戶(hu)語(yu)音產(chan)生(sheng)了(le)影響。特別(bie)(bie)是(shi)在人員復雜(za)、通信距離較短或需要(yao)較長時(shi)(shi)間使(shi)(shi)用(yong)時(shi)(shi)。因(yin)此(ci)，更需要(yao)有一(yi)(yi)個可靠的(de)(de)(de)無(wu)線(xian)對(dui)講系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)提供與有線(xian)對(dui)講系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)一(yi)(yi)樣的(de)(de)(de)語(yu)音信息與控(kong)制。無(wu)線(xian)對(dui)講系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)具有很高的(de)(de)(de)靈活(huo)性(xing)，它(ta)(ta)能夠滿足現(xian)場中所有環(huan)境使(shi)(shi)用(yong)需求并能隨時(shi)(shi)切換（如在野外(wai)、戶(hu)外(wai)電話等),用(yong)戶(hu)可以(yi)在任(ren)何地點(dian)(dian)使(shi)(shi)用(yong)、隨時(shi)(shi)、隨地進行通訊。使(shi)(shi)用(yong)方便、節(jie)省成本(ben)、節(jie)約費用(yong)。下(xia)面我們來(lai)了(le)解一(yi)(yi)下(xia)無(wu)線(xian)對(dui)講系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)(tong)它(ta)(ta)主要(yao)是(shi)什么(me)優點(dian)(dian)？

1.性能穩(wen)定，可(ke)靠性高

在相同無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)傳輸距離下(xia)，無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)傳輸信(xin)號更(geng)穩(wen)定(ding)由于(yu)使用了功率(lv)放大器來對(dui)無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)號進行壓(ya)縮和(he)放大，使無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)號更(geng)加穩(wen)定(ding)可靠(kao)。無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)號在弱(ruo)電磁環(huan)境(jing)下(xia)也能(neng)(neng)(neng)保持(chi)較(jiao)(jiao)好(hao)的(de)性(xing)(xing)能(neng)(neng)(neng)。無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)統(tong)(tong)(tong)具(ju)有(you)發射(she)(she)功率(lv)小、抗千(qian)(qian)擾(rao)(rao)能(neng)(neng)(neng)力(li)(li)強(與有(you)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)統(tong)(tong)(tong)比較(jiao)(jiao))和(he)抗電磁干擾(rao)(rao)能(neng)(neng)(neng)力(li)(li)強(與有(you)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)統(tong)(tong)(tong)比較(jiao)(jiao))的(de)特點。無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)對(dui)講(jiang)系(xi)統(tong)(tong)(tong)發射(she)(she)信(xin)號在發射(she)(she)前(qian)和(he)發射(she)(she)后均能(neng)(neng)(neng)保持(chi)良好(hao)的(de)性(xing)(xing)能(neng)(neng)(neng)，使用過程中(zhong)，發射(she)(she)信(xin)號與接收(shou)信(xin)號完全不受任何千(qian)(qian)擾(rao)(rao)，可保持(chi)很(hen)好(hao)的(de)穩(wen)定(ding)性(xing)(xing)，具(ju)有(you)良好(hao)的(de)抗千(qian)(qian)擾(rao)(rao)性(xing)(xing)和(he)抗低頻干擾(rao)(rao)能(neng)(neng)(neng)力(li)(li)，即(ji)使在惡劣(lie)的(de)環(huan)境(jing)下(xia)也能(neng)(neng)(neng)保持(chi)較(jiao)(jiao)好(hao)的(de)性(xing)(xing)能(neng)(neng)(neng)。因此無(wu)(wu)(wu)(wu)線(xian)(xian)(xian)系(xi)統(tong)(tong)(tong)有(you)較(jiao)(jiao)高的(de)可靠(kao)性(xing)(xing)。

2.功耗(hao)小、不受天氣、濕度的影響

無(wu)線(xian)對(dui)(dui)講系統(tong)(tong)在(zai)不(bu)同(tong)(tong)的(de)(de)環境中，無(wu)線(xian)通信設(she)備(bei)和有線(xian)通信設(she)備(bei)一樣(yang)都要進行電(dian)能的(de)(de)消耗。當環境溫(wen)度(du)(du)在(zai)-40°C以下時(shi)，無(wu)線(xian)通信設(she)備(bei)需要每天工(gong)作(zuo)8小時(shi)左(zuo)右(you);當環境溫(wen)度(du)(du)為-20°C時(shi)，每天工(gong)作(zuo)8小時(shi)左(zuo)右(you);當環境溫(wen)度(du)(du)為-30°C時(shi)，每天工(gong)作(zuo)4小時(shi)左(zuo)右(you)。目(mu)前市場上常見的(de)(de)無(wu)線(xian)對(dui)(dui)講系統(tong)(tong)有兩種(zhong)電(dian)源輸(shu)入(ru)方(fang)式，一種(zhong)是電(dian)源輸(shu)入(ru)，另(ling)一種(zhong)是電(dian)源輸(shu)出。從這兩種(zhong)方(fang)式對(dui)(dui)系統(tong)(tong)的(de)(de)功(gong)耗來看(kan)，電(dian)源輸(shu)入(ru)方(fang)式的(de)(de)功(gong)耗更大一些，但是功(gong)耗很小。并(bing)且設(she)備(bei)的(de)(de)工(gong)作(zuo)環境不(bu)同(tong)(tong)，對(dui)(dui)電(dian)池的(de)(de)需求量也不(bu)同(tong)(tong)，所以功(gong)耗也不(bu)同(tong)(tong)。

3信號不受干擾

在(zai)(zai)一(yi)(yi)些(xie)有干(gan)(gan)(gan)擾(rao)的(de)(de)(de)(de)地方(fang)，例如(ru)(ru)(ru)野外、機場、工(gong)廠等，一(yi)(yi)般(ban)(ban)采用(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)方(fang)式。分(fen)(fen)(fen)頻(pin)(pin)(pin)方(fang)式的(de)(de)(de)(de)抗(kang)(kang)干(gan)(gan)(gan)擾(rao)能(neng)(neng)(neng)力不強(qiang)，其抗(kang)(kang)干(gan)(gan)(gan)擾(rao)能(neng)(neng)(neng)力主(zhu)要(yao)取決于(yu)射頻(pin)(pin)(pin)功率(lv)的(de)(de)(de)(de)大小。分(fen)(fen)(fen)頻(pin)(pin)(pin)技術的(de)(de)(de)(de)功率(lv)一(yi)(yi)般(ban)(ban)是50dB在(zai)(zai)50dB左右時(shi)，其抗(kang)(kang)干(gan)(gan)(gan)擾(rao)能(neng)(neng)(neng)力強(qiang)。但由(you)于(yu)分(fen)(fen)(fen)頻(pin)(pin)(pin)的(de)(de)(de)(de)干(gan)(gan)(gan)擾(rao)與(yu)(yu)噪(zao)聲(sheng)(主(zhu)要(yao)是周(zhou)邊噪(zao)聲(sheng))具(ju)有很強(qiang)的(de)(de)(de)(de)互通(tong)性，當分(fen)(fen)(fen)頻(pin)(pin)(pin)發(fa)射的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)超(chao)過(guo)50dB時(shi)，其抗(kang)(kang)千擾(rao)能(neng)(neng)(neng)力就會(hui)減弱(ruo)。另外，在(zai)(zai)一(yi)(yi)些(xie)有噪(zao)音(yin)的(de)(de)(de)(de)環境中使(shi)(shi)用(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技術，會(hui)使(shi)(shi)分(fen)(fen)(fen)頻(pin)(pin)(pin)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)無法到達發(fa)射端(duan)的(de)(de)(de)(de)接收機或者造成(cheng)(cheng)發(fa)射端(duan)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)與(yu)(yu)接收端(duan)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)(de)糟(zao)合而造成(cheng)(cheng)分(fen)(fen)(fen)頻(pin)(pin)(pin)或干(gan)(gan)(gan)擾(rao)(例如(ru)(ru)(ru)在(zai)(zai)使(shi)(shi)用(yong)(yong)(yong)(yong)室外電(dian)話時(shi)) 。而采用(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技術的(de)(de)(de)(de)無線對(dui)講系(xi)統由(you)于(yu)發(fa)射功率(lv)小，分(fen)(fen)(fen)頻(pin)(pin)(pin)后的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)強(qiang)度(du)比(bi)有線對(dui)講系(xi)統高很多(在(zai)(zai)實際使(shi)(shi)用(yong)(yong)(yong)(yong)中分(fen)(fen)(fen)頻(pin)(pin)(pin)設備一(yi)(yi)般(ban)(ban)可以(yi)將系(xi)統信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)分(fen)(fen)(fen)頻(pin)(pin)(pin)到50dB以(yi)上),信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)不受干(gan)(gan)(gan)擾(rao)。如(ru)(ru)(ru)果采用(yong)(yong)(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技術，需要(yao)在(zai)(zai)較大的(de)(de)(de)(de)回波功率(lv)下才(cai)能(neng)(neng)(neng)實現信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)的(de)(de)(de)(de)分(fen)(fen)(fen)頻(pin)(pin)(pin)工(gong)作(zuo)(如(ru)(ru)(ru)分(fen)(fen)(fen)頻(pin)(pin)(pin)器發(fa)射信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)與(yu)(yu)接收信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)重疊時(shi)產生(sheng)的(de)(de)(de)(de)千擾(rao))和(he)發(fa)送信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)強(qiang)度(du)降低(di)(同(tong)頻(pin)(pin)(pin)帶內的(de)(de)(de)(de)兩只(zhi)天線對(dui)同(tong)一(yi)(yi)信(xin)(xin)(xin)(xin)(xin)道傳輸的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)強(qiang)度(du)基本一(yi)(yi)致(zhi));如(ru)(ru)(ru)果采用(yong)(yong)(yong)(yong)混(hun)響技術，則可以(yi)實現對(dui)無線信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)(hao)干(gan)(gan)(gan)擾(rao)的(de)(de)(de)(de)抑(yi)制或降低(di)。