由于(yu)在戶(hu)外(wai)(wai)、室內等區域，無線(xian)(xian)對(dui)講系(xi)(xi)(xi)統(tong)(tong)的(de)(de)信號強度較(jiao)(jiao)(jiao)弱(ruo)，而且采用(yong)頻率調(diao)制技術（如(ru) MHZ、 NMR、 BSI等）產生的(de)(de)信號傳輸時(shi)(shi)(shi)延(yan)大(da)，傳輸距離(li)遠。因此有(you)(you)線(xian)(xian)對(dui)講系(xi)(xi)(xi)統(tong)(tong)不適合在戶(hu)外(wai)(wai)環境(jing)使用(yong)，特別(bie)是在冬(dong)天及低風速季(ji)節使用(yong)。雖然無線(xian)(xian)對(dui)講系(xi)(xi)(xi)統(tong)(tong)也有(you)(you)著不錯的(de)(de)效果。但(dan)由于(yu)系(xi)(xi)(xi)統(tong)(tong)工作時(shi)(shi)(shi)會有(you)(you)一定的(de)(de)干擾(rao)，使對(dui)講效果下(xia)降，另(ling)外(wai)(wai)在信號較(jiao)(jiao)(jiao)弱(ruo)時(shi)(shi)(shi)對(dui)用(yong)戶(hu)語音(yin)產生了(le)影響。特別(bie)是在人(ren)員(yuan)復雜、通(tong)(tong)信距離(li)較(jiao)(jiao)(jiao)短(duan)或需(xu)要(yao)較(jiao)(jiao)(jiao)長時(shi)(shi)(shi)間(jian)使用(yong)時(shi)(shi)(shi)。因此，更需(xu)要(yao)有(you)(you)一個(ge)可(ke)靠的(de)(de)無線(xian)(xian)對(dui)講系(xi)(xi)(xi)統(tong)(tong)提供與有(you)(you)線(xian)(xian)對(dui)講系(xi)(xi)(xi)統(tong)(tong)一樣(yang)的(de)(de)語音(yin)信息與控(kong)制。無線(xian)(xian)對(dui)講系(xi)(xi)(xi)統(tong)(tong)具有(you)(you)很高的(de)(de)靈(ling)活(huo)性(xing)，它能夠滿(man)足現場(chang)中所有(you)(you)環境(jing)使用(yong)需(xu)求并能隨(sui)時(shi)(shi)(shi)切換（如(ru)在野(ye)外(wai)(wai)、戶(hu)外(wai)(wai)電話等),用(yong)戶(hu)可(ke)以在任(ren)何地點使用(yong)、隨(sui)時(shi)(shi)(shi)、隨(sui)地進行通(tong)(tong)訊。使用(yong)方便、節省(sheng)成(cheng)本(ben)、節約費用(yong)。下(xia)面我們來了(le)解一下(xia)無線(xian)(xian)對(dui)講系(xi)(xi)(xi)統(tong)(tong)它主要(yao)是什么優點？

1.性(xing)能穩定，可靠性(xing)高(gao)

在(zai)(zai)相同(tong)無(wu)(wu)線(xian)(xian)傳輸(shu)(shu)距離(li)下(xia)，無(wu)(wu)線(xian)(xian)傳輸(shu)(shu)信(xin)號更穩定(ding)由于使用了功(gong)率放大(da)器來對無(wu)(wu)線(xian)(xian)信(xin)號進行(xing)壓縮(suo)和(he)放大(da)，使無(wu)(wu)線(xian)(xian)信(xin)號更加(jia)穩定(ding)可靠。無(wu)(wu)線(xian)(xian)信(xin)號在(zai)(zai)弱電(dian)磁(ci)環境下(xia)也(ye)能(neng)(neng)(neng)保(bao)持較(jiao)好的(de)(de)性(xing)(xing)能(neng)(neng)(neng)。無(wu)(wu)線(xian)(xian)對講系統(tong)具(ju)有發(fa)射功(gong)率小、抗千擾能(neng)(neng)(neng)力(li)強(與(yu)有線(xian)(xian)對講系統(tong)比(bi)較(jiao))和(he)抗電(dian)磁(ci)干擾能(neng)(neng)(neng)力(li)強(與(yu)有線(xian)(xian)對講系統(tong)比(bi)較(jiao))的(de)(de)特點。無(wu)(wu)線(xian)(xian)對講系統(tong)發(fa)射信(xin)號在(zai)(zai)發(fa)射前和(he)發(fa)射后均能(neng)(neng)(neng)保(bao)持良好的(de)(de)性(xing)(xing)能(neng)(neng)(neng)，使用過程中(zhong)，發(fa)射信(xin)號與(yu)接收信(xin)號完(wan)全不受任何千擾，可保(bao)持很好的(de)(de)穩定(ding)性(xing)(xing)，具(ju)有良好的(de)(de)抗千擾性(xing)(xing)和(he)抗低頻干擾能(neng)(neng)(neng)力(li)，即(ji)使在(zai)(zai)惡劣的(de)(de)環境下(xia)也(ye)能(neng)(neng)(neng)保(bao)持較(jiao)好的(de)(de)性(xing)(xing)能(neng)(neng)(neng)。因此無(wu)(wu)線(xian)(xian)系統(tong)有較(jiao)高的(de)(de)可靠性(xing)(xing)。

2.功耗小、不受天(tian)氣、濕度的影響

無線(xian)(xian)對(dui)(dui)講系(xi)(xi)(xi)統(tong)在不(bu)(bu)同(tong)(tong)的(de)環境(jing)中，無線(xian)(xian)通(tong)信(xin)設備(bei)(bei)(bei)和有線(xian)(xian)通(tong)信(xin)設備(bei)(bei)(bei)一(yi)(yi)樣都(dou)要進(jin)行(xing)電(dian)能的(de)消耗。當環境(jing)溫度在-40°C以下時，無線(xian)(xian)通(tong)信(xin)設備(bei)(bei)(bei)需要每(mei)天工(gong)作(zuo)(zuo)8小(xiao)(xiao)時左(zuo)(zuo)右;當環境(jing)溫度為(wei)-20°C時，每(mei)天工(gong)作(zuo)(zuo)8小(xiao)(xiao)時左(zuo)(zuo)右;當環境(jing)溫度為(wei)-30°C時，每(mei)天工(gong)作(zuo)(zuo)4小(xiao)(xiao)時左(zuo)(zuo)右。目前(qian)市場上(shang)常見的(de)無線(xian)(xian)對(dui)(dui)講系(xi)(xi)(xi)統(tong)有兩種(zhong)電(dian)源(yuan)輸入(ru)方(fang)式，一(yi)(yi)種(zhong)是(shi)電(dian)源(yuan)輸入(ru)，另一(yi)(yi)種(zhong)是(shi)電(dian)源(yuan)輸出。從這兩種(zhong)方(fang)式對(dui)(dui)系(xi)(xi)(xi)統(tong)的(de)功(gong)(gong)(gong)耗來看(kan)，電(dian)源(yuan)輸入(ru)方(fang)式的(de)功(gong)(gong)(gong)耗更大一(yi)(yi)些，但是(shi)功(gong)(gong)(gong)耗很(hen)小(xiao)(xiao)。并且設備(bei)(bei)(bei)的(de)工(gong)作(zuo)(zuo)環境(jing)不(bu)(bu)同(tong)(tong)，對(dui)(dui)電(dian)池的(de)需求量也(ye)不(bu)(bu)同(tong)(tong)，所以功(gong)(gong)(gong)耗也(ye)不(bu)(bu)同(tong)(tong)。

3信號不受干擾

在一(yi)些(xie)有干(gan)(gan)擾(rao)(rao)的(de)(de)地(di)方，例如(ru)野外(wai)、機場、工廠等，一(yi)般(ban)采用(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)方式(shi)。分(fen)(fen)(fen)頻(pin)(pin)(pin)方式(shi)的(de)(de)抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)(neng)力(li)(li)(li)不強(qiang)(qiang)，其抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)(neng)力(li)(li)(li)主(zhu)要取決于(yu)射(she)頻(pin)(pin)(pin)功(gong)(gong)率(lv)的(de)(de)大(da)小。分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu)(shu)的(de)(de)功(gong)(gong)率(lv)一(yi)般(ban)是50dB在50dB左(zuo)右時，其抗(kang)干(gan)(gan)擾(rao)(rao)能(neng)(neng)力(li)(li)(li)強(qiang)(qiang)。但由(you)(you)于(yu)分(fen)(fen)(fen)頻(pin)(pin)(pin)的(de)(de)干(gan)(gan)擾(rao)(rao)與(yu)(yu)噪(zao)聲(sheng)(sheng)(主(zhu)要是周邊噪(zao)聲(sheng)(sheng))具有很(hen)強(qiang)(qiang)的(de)(de)互通性，當(dang)分(fen)(fen)(fen)頻(pin)(pin)(pin)發(fa)(fa)射(she)的(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)超(chao)過50dB時，其抗(kang)千(qian)擾(rao)(rao)能(neng)(neng)力(li)(li)(li)就會減弱。另外(wai)，在一(yi)些(xie)有噪(zao)音的(de)(de)環境(jing)中使用(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu)(shu)，會使分(fen)(fen)(fen)頻(pin)(pin)(pin)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)無(wu)法到(dao)達發(fa)(fa)射(she)端(duan)(duan)的(de)(de)接收(shou)(shou)機或(huo)者造(zao)(zao)成發(fa)(fa)射(she)端(duan)(duan)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與(yu)(yu)接收(shou)(shou)端(duan)(duan)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)糟合而造(zao)(zao)成分(fen)(fen)(fen)頻(pin)(pin)(pin)或(huo)干(gan)(gan)擾(rao)(rao)(例如(ru)在使用(yong)室外(wai)電話時) 。而采用(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu)(shu)的(de)(de)無(wu)線(xian)對(dui)(dui)講系(xi)(xi)統(tong)由(you)(you)于(yu)發(fa)(fa)射(she)功(gong)(gong)率(lv)小，分(fen)(fen)(fen)頻(pin)(pin)(pin)后的(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)度比有線(xian)對(dui)(dui)講系(xi)(xi)統(tong)高(gao)很(hen)多(在實(shi)(shi)際使用(yong)中分(fen)(fen)(fen)頻(pin)(pin)(pin)設備一(yi)般(ban)可以將系(xi)(xi)統(tong)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)(fen)頻(pin)(pin)(pin)到(dao)50dB以上),信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)不受(shou)干(gan)(gan)擾(rao)(rao)。如(ru)果采用(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu)(shu)，需要在較(jiao)大(da)的(de)(de)回波功(gong)(gong)率(lv)下才能(neng)(neng)實(shi)(shi)現(xian)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)分(fen)(fen)(fen)頻(pin)(pin)(pin)工作(如(ru)分(fen)(fen)(fen)頻(pin)(pin)(pin)器發(fa)(fa)射(she)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與(yu)(yu)接收(shou)(shou)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)重疊時產生的(de)(de)千(qian)擾(rao)(rao))和發(fa)(fa)送(song)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)度降低(同頻(pin)(pin)(pin)帶內的(de)(de)兩只(zhi)天線(xian)對(dui)(dui)同一(yi)信(xin)(xin)(xin)(xin)(xin)(xin)道傳輸的(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)度基本一(yi)致);如(ru)果采用(yong)混響技(ji)術(shu)(shu)，則可以實(shi)(shi)現(xian)對(dui)(dui)無(wu)線(xian)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)干(gan)(gan)擾(rao)(rao)的(de)(de)抑制或(huo)降低。