由于在(zai)(zai)(zai)戶外(wai)、室(shi)內(nei)等區域，無(wu)線(xian)(xian)對講(jiang)(jiang)系(xi)統(tong)(tong)的(de)信號強度較(jiao)(jiao)弱，而且(qie)采用(yong)(yong)頻率調制技術（如 MHZ、 NMR、 BSI等）產(chan)(chan)生(sheng)的(de)信號傳(chuan)(chuan)輸時(shi)(shi)延(yan)大，傳(chuan)(chuan)輸距(ju)離(li)遠。因(yin)此(ci)有(you)(you)(you)線(xian)(xian)對講(jiang)(jiang)系(xi)統(tong)(tong)不適合在(zai)(zai)(zai)戶外(wai)環(huan)境使(shi)(shi)用(yong)(yong)，特別(bie)是(shi)在(zai)(zai)(zai)冬天及低風速季節(jie)(jie)使(shi)(shi)用(yong)(yong)。雖(sui)然(ran)無(wu)線(xian)(xian)對講(jiang)(jiang)系(xi)統(tong)(tong)也有(you)(you)(you)著不錯(cuo)的(de)效果。但由于系(xi)統(tong)(tong)工作時(shi)(shi)會有(you)(you)(you)一(yi)(yi)定(ding)的(de)干(gan)擾，使(shi)(shi)對講(jiang)(jiang)效果下降(jiang)，另(ling)外(wai)在(zai)(zai)(zai)信號較(jiao)(jiao)弱時(shi)(shi)對用(yong)(yong)戶語音(yin)(yin)產(chan)(chan)生(sheng)了(le)(le)影(ying)響。特別(bie)是(shi)在(zai)(zai)(zai)人員復雜、通信距(ju)離(li)較(jiao)(jiao)短或需要(yao)(yao)較(jiao)(jiao)長時(shi)(shi)間使(shi)(shi)用(yong)(yong)時(shi)(shi)。因(yin)此(ci)，更需要(yao)(yao)有(you)(you)(you)一(yi)(yi)個可靠的(de)無(wu)線(xian)(xian)對講(jiang)(jiang)系(xi)統(tong)(tong)提(ti)供(gong)與有(you)(you)(you)線(xian)(xian)對講(jiang)(jiang)系(xi)統(tong)(tong)一(yi)(yi)樣的(de)語音(yin)(yin)信息與控(kong)制。無(wu)線(xian)(xian)對講(jiang)(jiang)系(xi)統(tong)(tong)具(ju)有(you)(you)(you)很高的(de)靈活性，它能夠滿足現(xian)場(chang)中所有(you)(you)(you)環(huan)境使(shi)(shi)用(yong)(yong)需求并能隨(sui)時(shi)(shi)切換（如在(zai)(zai)(zai)野外(wai)、戶外(wai)電話等),用(yong)(yong)戶可以在(zai)(zai)(zai)任(ren)何地點(dian)使(shi)(shi)用(yong)(yong)、隨(sui)時(shi)(shi)、隨(sui)地進行通訊。使(shi)(shi)用(yong)(yong)方便、節(jie)(jie)省(sheng)成本、節(jie)(jie)約費用(yong)(yong)。下面我們來了(le)(le)解一(yi)(yi)下無(wu)線(xian)(xian)對講(jiang)(jiang)系(xi)統(tong)(tong)它主要(yao)(yao)是(shi)什么優(you)點(dian)？

1.性能穩定，可(ke)靠(kao)性高

在(zai)相同無(wu)線傳輸距離下，無(wu)線傳輸信號(hao)更穩(wen)定(ding)由于使(shi)(shi)用(yong)了(le)功率(lv)放(fang)大(da)器來對無(wu)線信號(hao)進行壓縮和(he)(he)放(fang)大(da)，使(shi)(shi)無(wu)線信號(hao)更加(jia)穩(wen)定(ding)可靠(kao)。無(wu)線信號(hao)在(zai)弱(ruo)電磁環(huan)境下也能(neng)(neng)保持(chi)較(jiao)好(hao)(hao)的(de)(de)(de)性(xing)(xing)(xing)能(neng)(neng)。無(wu)線對講(jiang)系統(tong)(tong)具有(you)發射(she)(she)功率(lv)小、抗(kang)千擾能(neng)(neng)力(li)強(qiang)(與(yu)有(you)線對講(jiang)系統(tong)(tong)比較(jiao))和(he)(he)抗(kang)電磁干(gan)擾能(neng)(neng)力(li)強(qiang)(與(yu)有(you)線對講(jiang)系統(tong)(tong)比較(jiao))的(de)(de)(de)特點。無(wu)線對講(jiang)系統(tong)(tong)發射(she)(she)信號(hao)在(zai)發射(she)(she)前和(he)(he)發射(she)(she)后均能(neng)(neng)保持(chi)良好(hao)(hao)的(de)(de)(de)性(xing)(xing)(xing)能(neng)(neng)，使(shi)(shi)用(yong)過程中，發射(she)(she)信號(hao)與(yu)接(jie)收信號(hao)完(wan)全(quan)不受任何千擾，可保持(chi)很好(hao)(hao)的(de)(de)(de)穩(wen)定(ding)性(xing)(xing)(xing)，具有(you)良好(hao)(hao)的(de)(de)(de)抗(kang)千擾性(xing)(xing)(xing)和(he)(he)抗(kang)低頻干(gan)擾能(neng)(neng)力(li)，即(ji)使(shi)(shi)在(zai)惡劣的(de)(de)(de)環(huan)境下也能(neng)(neng)保持(chi)較(jiao)好(hao)(hao)的(de)(de)(de)性(xing)(xing)(xing)能(neng)(neng)。因此無(wu)線系統(tong)(tong)有(you)較(jiao)高的(de)(de)(de)可靠(kao)性(xing)(xing)(xing)。

2.功耗小、不受天(tian)氣、濕(shi)度的影響(xiang)

無(wu)(wu)線(xian)對(dui)講(jiang)系統(tong)在(zai)(zai)不(bu)同(tong)的(de)環(huan)(huan)(huan)境(jing)中，無(wu)(wu)線(xian)通信設備和(he)有線(xian)通信設備一樣都要進行(xing)電(dian)(dian)能的(de)消耗(hao)(hao)。當環(huan)(huan)(huan)境(jing)溫(wen)度(du)在(zai)(zai)-40°C以下時(shi)，無(wu)(wu)線(xian)通信設備需要每(mei)天(tian)(tian)工作8小時(shi)左(zuo)右;當環(huan)(huan)(huan)境(jing)溫(wen)度(du)為-20°C時(shi)，每(mei)天(tian)(tian)工作8小時(shi)左(zuo)右;當環(huan)(huan)(huan)境(jing)溫(wen)度(du)為-30°C時(shi)，每(mei)天(tian)(tian)工作4小時(shi)左(zuo)右。目前市場上(shang)常見的(de)無(wu)(wu)線(xian)對(dui)講(jiang)系統(tong)有兩種(zhong)電(dian)(dian)源輸入方式，一種(zhong)是(shi)電(dian)(dian)源輸入，另(ling)一種(zhong)是(shi)電(dian)(dian)源輸出。從(cong)這兩種(zhong)方式對(dui)系統(tong)的(de)功(gong)耗(hao)(hao)來看(kan)，電(dian)(dian)源輸入方式的(de)功(gong)耗(hao)(hao)更(geng)大一些，但是(shi)功(gong)耗(hao)(hao)很小。并且設備的(de)工作環(huan)(huan)(huan)境(jing)不(bu)同(tong)，對(dui)電(dian)(dian)池(chi)的(de)需求量也不(bu)同(tong)，所以功(gong)耗(hao)(hao)也不(bu)同(tong)。

3信號不受干擾

在(zai)一(yi)(yi)(yi)些有(you)(you)干擾(rao)(rao)(rao)的(de)(de)(de)(de)地方，例如野外(wai)、機場、工廠等，一(yi)(yi)(yi)般采(cai)用(yong)(yong)分(fen)(fen)(fen)頻方式(shi)。分(fen)(fen)(fen)頻方式(shi)的(de)(de)(de)(de)抗干擾(rao)(rao)(rao)能(neng)力(li)(li)不強，其抗干擾(rao)(rao)(rao)能(neng)力(li)(li)主要取決(jue)于射(she)(she)(she)頻功(gong)(gong)率(lv)(lv)的(de)(de)(de)(de)大小。分(fen)(fen)(fen)頻技(ji)術(shu)的(de)(de)(de)(de)功(gong)(gong)率(lv)(lv)一(yi)(yi)(yi)般是50dB在(zai)50dB左右時(shi)(shi)(shi)，其抗干擾(rao)(rao)(rao)能(neng)力(li)(li)強。但由于分(fen)(fen)(fen)頻的(de)(de)(de)(de)干擾(rao)(rao)(rao)與(yu)噪聲(主要是周(zhou)邊噪聲)具有(you)(you)很(hen)強的(de)(de)(de)(de)互(hu)通性，當(dang)分(fen)(fen)(fen)頻發(fa)射(she)(she)(she)的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)超過50dB時(shi)(shi)(shi)，其抗千擾(rao)(rao)(rao)能(neng)力(li)(li)就會減弱。另(ling)外(wai)，在(zai)一(yi)(yi)(yi)些有(you)(you)噪音的(de)(de)(de)(de)環境中(zhong)使(shi)(shi)用(yong)(yong)分(fen)(fen)(fen)頻技(ji)術(shu)，會使(shi)(shi)分(fen)(fen)(fen)頻信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)無法到(dao)達(da)發(fa)射(she)(she)(she)端(duan)的(de)(de)(de)(de)接收(shou)(shou)機或(huo)者造(zao)成發(fa)射(she)(she)(she)端(duan)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與(yu)接收(shou)(shou)端(duan)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)(de)糟合而(er)造(zao)成分(fen)(fen)(fen)頻或(huo)干擾(rao)(rao)(rao)(例如在(zai)使(shi)(shi)用(yong)(yong)室外(wai)電話時(shi)(shi)(shi)) 。而(er)采(cai)用(yong)(yong)分(fen)(fen)(fen)頻技(ji)術(shu)的(de)(de)(de)(de)無線(xian)對(dui)講(jiang)系(xi)統(tong)由于發(fa)射(she)(she)(she)功(gong)(gong)率(lv)(lv)小，分(fen)(fen)(fen)頻后的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)比有(you)(you)線(xian)對(dui)講(jiang)系(xi)統(tong)高很(hen)多(duo)(在(zai)實(shi)際使(shi)(shi)用(yong)(yong)中(zhong)分(fen)(fen)(fen)頻設(she)備(bei)一(yi)(yi)(yi)般可以將系(xi)統(tong)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)(fen)頻到(dao)50dB以上),信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)不受干擾(rao)(rao)(rao)。如果采(cai)用(yong)(yong)分(fen)(fen)(fen)頻技(ji)術(shu)，需要在(zai)較大的(de)(de)(de)(de)回波功(gong)(gong)率(lv)(lv)下才能(neng)實(shi)現信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)(de)分(fen)(fen)(fen)頻工作(如分(fen)(fen)(fen)頻器發(fa)射(she)(she)(she)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與(yu)接收(shou)(shou)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)重疊時(shi)(shi)(shi)產生的(de)(de)(de)(de)千擾(rao)(rao)(rao))和發(fa)送信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)降(jiang)低(同(tong)頻帶(dai)內(nei)的(de)(de)(de)(de)兩只天(tian)線(xian)對(dui)同(tong)一(yi)(yi)(yi)信(xin)(xin)(xin)(xin)道傳(chuan)輸的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)基(ji)本(ben)一(yi)(yi)(yi)致);如果采(cai)用(yong)(yong)混響技(ji)術(shu)，則可以實(shi)現對(dui)無線(xian)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)干擾(rao)(rao)(rao)的(de)(de)(de)(de)抑制或(huo)降(jiang)低。