由(you)(you)于在(zai)戶外(wai)、室(shi)內等(deng)區域，無(wu)線(xian)(xian)(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)系(xi)統(tong)(tong)的(de)(de)(de)信(xin)(xin)(xin)號強度較(jiao)弱，而且采用(yong)頻率(lv)調制(zhi)(zhi)技術(shu)（如(ru) MHZ、 NMR、 BSI等(deng)）產生的(de)(de)(de)信(xin)(xin)(xin)號傳(chuan)輸時(shi)(shi)(shi)延大(da)，傳(chuan)輸距離(li)遠(yuan)。因此有(you)(you)(you)(you)(you)線(xian)(xian)(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)系(xi)統(tong)(tong)不(bu)適(shi)合在(zai)戶外(wai)環境(jing)使(shi)用(yong)，特(te)(te)別(bie)是(shi)在(zai)冬天及低風(feng)速季節使(shi)用(yong)。雖然無(wu)線(xian)(xian)(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)系(xi)統(tong)(tong)也有(you)(you)(you)(you)(you)著不(bu)錯的(de)(de)(de)效(xiao)果。但由(you)(you)于系(xi)統(tong)(tong)工作時(shi)(shi)(shi)會有(you)(you)(you)(you)(you)一定的(de)(de)(de)干擾，使(shi)對(dui)(dui)(dui)(dui)講(jiang)(jiang)效(xiao)果下降(jiang)，另(ling)外(wai)在(zai)信(xin)(xin)(xin)號較(jiao)弱時(shi)(shi)(shi)對(dui)(dui)(dui)(dui)用(yong)戶語(yu)音(yin)產生了影響。特(te)(te)別(bie)是(shi)在(zai)人員復雜、通信(xin)(xin)(xin)距離(li)較(jiao)短或需要較(jiao)長時(shi)(shi)(shi)間使(shi)用(yong)時(shi)(shi)(shi)。因此，更需要有(you)(you)(you)(you)(you)一個可靠(kao)的(de)(de)(de)無(wu)線(xian)(xian)(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)系(xi)統(tong)(tong)提(ti)供與(yu)有(you)(you)(you)(you)(you)線(xian)(xian)(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)系(xi)統(tong)(tong)一樣的(de)(de)(de)語(yu)音(yin)信(xin)(xin)(xin)息與(yu)控制(zhi)(zhi)。無(wu)線(xian)(xian)(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)系(xi)統(tong)(tong)具有(you)(you)(you)(you)(you)很高的(de)(de)(de)靈活性，它能夠滿(man)足現場(chang)中所有(you)(you)(you)(you)(you)環境(jing)使(shi)用(yong)需求并(bing)能隨(sui)時(shi)(shi)(shi)切換(huan)（如(ru)在(zai)野外(wai)、戶外(wai)電(dian)話等(deng)),用(yong)戶可以在(zai)任何地點(dian)使(shi)用(yong)、隨(sui)時(shi)(shi)(shi)、隨(sui)地進行通訊。使(shi)用(yong)方便、節省成本、節約(yue)費(fei)用(yong)。下面(mian)我們(men)來了解一下無(wu)線(xian)(xian)(xian)對(dui)(dui)(dui)(dui)講(jiang)(jiang)系(xi)統(tong)(tong)它主要是(shi)什么(me)優點(dian)？

1.性能(neng)穩定，可靠性高

在(zai)相同無(wu)(wu)線(xian)(xian)(xian)傳輸距離下(xia)，無(wu)(wu)線(xian)(xian)(xian)傳輸信(xin)(xin)號(hao)更穩(wen)定由于(yu)使(shi)(shi)用(yong)了功(gong)率放大(da)器來對(dui)無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)進行壓縮和(he)(he)放大(da)，使(shi)(shi)無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)更加穩(wen)定可靠(kao)。無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)在(zai)弱電磁(ci)環境下(xia)也(ye)能(neng)(neng)保持較(jiao)好(hao)的(de)(de)(de)性能(neng)(neng)。無(wu)(wu)線(xian)(xian)(xian)對(dui)講系(xi)統(tong)具(ju)有發(fa)(fa)射(she)(she)(she)功(gong)率小(xiao)、抗千(qian)擾(rao)(rao)能(neng)(neng)力強(qiang)(與有線(xian)(xian)(xian)對(dui)講系(xi)統(tong)比較(jiao))和(he)(he)抗電磁(ci)干擾(rao)(rao)能(neng)(neng)力強(qiang)(與有線(xian)(xian)(xian)對(dui)講系(xi)統(tong)比較(jiao))的(de)(de)(de)特點。無(wu)(wu)線(xian)(xian)(xian)對(dui)講系(xi)統(tong)發(fa)(fa)射(she)(she)(she)信(xin)(xin)號(hao)在(zai)發(fa)(fa)射(she)(she)(she)前和(he)(he)發(fa)(fa)射(she)(she)(she)后均(jun)能(neng)(neng)保持良好(hao)的(de)(de)(de)性能(neng)(neng)，使(shi)(shi)用(yong)過程(cheng)中，發(fa)(fa)射(she)(she)(she)信(xin)(xin)號(hao)與接(jie)收信(xin)(xin)號(hao)完全(quan)不受任何(he)千(qian)擾(rao)(rao)，可保持很好(hao)的(de)(de)(de)穩(wen)定性，具(ju)有良好(hao)的(de)(de)(de)抗千(qian)擾(rao)(rao)性和(he)(he)抗低頻干擾(rao)(rao)能(neng)(neng)力，即使(shi)(shi)在(zai)惡(e)劣(lie)的(de)(de)(de)環境下(xia)也(ye)能(neng)(neng)保持較(jiao)好(hao)的(de)(de)(de)性能(neng)(neng)。因此無(wu)(wu)線(xian)(xian)(xian)系(xi)統(tong)有較(jiao)高的(de)(de)(de)可靠(kao)性。

2.功耗小、不受天氣、濕度的影響

無(wu)線(xian)對講(jiang)系(xi)統在不(bu)同(tong)(tong)的(de)環境(jing)(jing)中(zhong)，無(wu)線(xian)通(tong)(tong)信設備(bei)(bei)和有線(xian)通(tong)(tong)信設備(bei)(bei)一(yi)樣都要(yao)(yao)進行電(dian)(dian)能的(de)消耗。當環境(jing)(jing)溫度在-40°C以下(xia)時(shi)，無(wu)線(xian)通(tong)(tong)信設備(bei)(bei)需要(yao)(yao)每天工(gong)(gong)作(zuo)8小時(shi)左(zuo)右(you);當環境(jing)(jing)溫度為(wei)(wei)-20°C時(shi)，每天工(gong)(gong)作(zuo)8小時(shi)左(zuo)右(you);當環境(jing)(jing)溫度為(wei)(wei)-30°C時(shi)，每天工(gong)(gong)作(zuo)4小時(shi)左(zuo)右(you)。目前市(shi)場上常見的(de)無(wu)線(xian)對講(jiang)系(xi)統有兩(liang)種(zhong)電(dian)(dian)源(yuan)輸(shu)入方(fang)式(shi)(shi)，一(yi)種(zhong)是電(dian)(dian)源(yuan)輸(shu)入，另一(yi)種(zhong)是電(dian)(dian)源(yuan)輸(shu)出。從這兩(liang)種(zhong)方(fang)式(shi)(shi)對系(xi)統的(de)功(gong)耗來看，電(dian)(dian)源(yuan)輸(shu)入方(fang)式(shi)(shi)的(de)功(gong)耗更大一(yi)些，但是功(gong)耗很(hen)小。并且設備(bei)(bei)的(de)工(gong)(gong)作(zuo)環境(jing)(jing)不(bu)同(tong)(tong)，對電(dian)(dian)池(chi)的(de)需求(qiu)量(liang)也不(bu)同(tong)(tong)，所以功(gong)耗也不(bu)同(tong)(tong)。

3信號不受干擾

在一(yi)(yi)些(xie)有(you)(you)干(gan)擾(rao)(rao)(rao)(rao)的(de)(de)地方，例如(ru)(ru)野外、機(ji)場、工廠等，一(yi)(yi)般(ban)采(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)方式(shi)。分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)方式(shi)的(de)(de)抗(kang)干(gan)擾(rao)(rao)(rao)(rao)能(neng)力(li)不(bu)強(qiang)(qiang)(qiang)，其抗(kang)干(gan)擾(rao)(rao)(rao)(rao)能(neng)力(li)主(zhu)要(yao)取決于(yu)射(she)(she)頻(pin)(pin)(pin)(pin)(pin)功率(lv)的(de)(de)大(da)小。分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技(ji)術的(de)(de)功率(lv)一(yi)(yi)般(ban)是50dB在50dB左(zuo)右時(shi)，其抗(kang)干(gan)擾(rao)(rao)(rao)(rao)能(neng)力(li)強(qiang)(qiang)(qiang)。但由(you)于(yu)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)的(de)(de)干(gan)擾(rao)(rao)(rao)(rao)與(yu)噪(zao)聲(sheng)(主(zhu)要(yao)是周邊噪(zao)聲(sheng))具有(you)(you)很(hen)強(qiang)(qiang)(qiang)的(de)(de)互通性，當分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)發射(she)(she)的(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)超過(guo)50dB時(shi)，其抗(kang)千(qian)擾(rao)(rao)(rao)(rao)能(neng)力(li)就(jiu)會(hui)(hui)減(jian)弱(ruo)。另外，在一(yi)(yi)些(xie)有(you)(you)噪(zao)音的(de)(de)環境中(zhong)使(shi)(shi)(shi)(shi)用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技(ji)術，會(hui)(hui)使(shi)(shi)(shi)(shi)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)信(xin)(xin)號(hao)(hao)(hao)(hao)無法(fa)到達發射(she)(she)端的(de)(de)接(jie)收(shou)機(ji)或(huo)者(zhe)造(zao)成發射(she)(she)端信(xin)(xin)號(hao)(hao)(hao)(hao)與(yu)接(jie)收(shou)端信(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)糟合而(er)造(zao)成分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)或(huo)干(gan)擾(rao)(rao)(rao)(rao)(例如(ru)(ru)在使(shi)(shi)(shi)(shi)用(yong)(yong)室外電話(hua)時(shi)) 。而(er)采(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技(ji)術的(de)(de)無線(xian)對(dui)(dui)講系統(tong)由(you)于(yu)發射(she)(she)功率(lv)小，分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)后的(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)(qiang)度比有(you)(you)線(xian)對(dui)(dui)講系統(tong)高很(hen)多(在實(shi)際使(shi)(shi)(shi)(shi)用(yong)(yong)中(zhong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)設備一(yi)(yi)般(ban)可以(yi)將系統(tong)信(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)到50dB以(yi)上),信(xin)(xin)號(hao)(hao)(hao)(hao)不(bu)受(shou)干(gan)擾(rao)(rao)(rao)(rao)。如(ru)(ru)果采(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技(ji)術，需要(yao)在較大(da)的(de)(de)回波(bo)功率(lv)下(xia)才(cai)能(neng)實(shi)現(xian)信(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)工作(如(ru)(ru)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)器發射(she)(she)信(xin)(xin)號(hao)(hao)(hao)(hao)與(yu)接(jie)收(shou)信(xin)(xin)號(hao)(hao)(hao)(hao)重(zhong)疊(die)時(shi)產生的(de)(de)千(qian)擾(rao)(rao)(rao)(rao))和發送信(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)(qiang)度降低(di)(同頻(pin)(pin)(pin)(pin)(pin)帶(dai)內的(de)(de)兩只天線(xian)對(dui)(dui)同一(yi)(yi)信(xin)(xin)道傳輸的(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)(qiang)度基(ji)本一(yi)(yi)致(zhi));如(ru)(ru)果采(cai)用(yong)(yong)混響技(ji)術，則可以(yi)實(shi)現(xian)對(dui)(dui)無線(xian)信(xin)(xin)號(hao)(hao)(hao)(hao)干(gan)擾(rao)(rao)(rao)(rao)的(de)(de)抑制或(huo)降低(di)。