由(you)于在戶外、室內等區域，無(wu)線(xian)對講(jiang)(jiang)系統(tong)(tong)(tong)(tong)的(de)信號強度(du)較(jiao)弱，而且采用(yong)(yong)(yong)頻率調制技(ji)術（如 MHZ、 NMR、 BSI等）產(chan)生(sheng)的(de)信號傳(chuan)輸(shu)時(shi)(shi)延大，傳(chuan)輸(shu)距(ju)(ju)離遠(yuan)。因(yin)此(ci)有(you)線(xian)對講(jiang)(jiang)系統(tong)(tong)(tong)(tong)不適合在戶外環(huan)境使用(yong)(yong)(yong)，特別是(shi)在冬天及低風速(su)季節使用(yong)(yong)(yong)。雖然(ran)無(wu)線(xian)對講(jiang)(jiang)系統(tong)(tong)(tong)(tong)也(ye)有(you)著(zhu)不錯的(de)效(xiao)果。但由(you)于系統(tong)(tong)(tong)(tong)工作(zuo)時(shi)(shi)會有(you)一定的(de)干擾(rao)，使對講(jiang)(jiang)效(xiao)果下(xia)降，另外在信號較(jiao)弱時(shi)(shi)對用(yong)(yong)(yong)戶語音產(chan)生(sheng)了影響。特別是(shi)在人員(yuan)復雜、通信距(ju)(ju)離較(jiao)短或需(xu)要(yao)(yao)較(jiao)長(chang)時(shi)(shi)間使用(yong)(yong)(yong)時(shi)(shi)。因(yin)此(ci)，更(geng)需(xu)要(yao)(yao)有(you)一個可(ke)靠的(de)無(wu)線(xian)對講(jiang)(jiang)系統(tong)(tong)(tong)(tong)提供與有(you)線(xian)對講(jiang)(jiang)系統(tong)(tong)(tong)(tong)一樣的(de)語音信息與控(kong)制。無(wu)線(xian)對講(jiang)(jiang)系統(tong)(tong)(tong)(tong)具(ju)有(you)很(hen)高的(de)靈活(huo)性，它能(neng)夠滿足現(xian)場中所有(you)環(huan)境使用(yong)(yong)(yong)需(xu)求并(bing)能(neng)隨時(shi)(shi)切(qie)換（如在野外、戶外電話等),用(yong)(yong)(yong)戶可(ke)以在任何地點使用(yong)(yong)(yong)、隨時(shi)(shi)、隨地進行通訊。使用(yong)(yong)(yong)方便、節省成本(ben)、節約費用(yong)(yong)(yong)。下(xia)面我們來了解一下(xia)無(wu)線(xian)對講(jiang)(jiang)系統(tong)(tong)(tong)(tong)它主要(yao)(yao)是(shi)什(shen)么優點？

1.性能(neng)穩定，可靠(kao)性高(gao)

在相同無線(xian)傳輸距離(li)下(xia)，無線(xian)傳輸信(xin)號(hao)更穩定由(you)于使用了功率放(fang)大(da)器來對無線(xian)信(xin)號(hao)進(jin)行壓縮和(he)放(fang)大(da)，使無線(xian)信(xin)號(hao)更加(jia)穩定可(ke)靠。無線(xian)信(xin)號(hao)在弱(ruo)電(dian)磁(ci)環(huan)境(jing)下(xia)也能(neng)保(bao)(bao)持較好(hao)的(de)性(xing)能(neng)。無線(xian)對講(jiang)系統(tong)具有發(fa)射功率小、抗千(qian)擾(rao)能(neng)力強(與有線(xian)對講(jiang)系統(tong)比較)和(he)抗電(dian)磁(ci)干(gan)擾(rao)能(neng)力強(與有線(xian)對講(jiang)系統(tong)比較)的(de)特點。無線(xian)對講(jiang)系統(tong)發(fa)射信(xin)號(hao)在發(fa)射前和(he)發(fa)射后均能(neng)保(bao)(bao)持良好(hao)的(de)性(xing)能(neng)，使用過程中(zhong)，發(fa)射信(xin)號(hao)與接收信(xin)號(hao)完(wan)全不受(shou)任何千(qian)擾(rao)，可(ke)保(bao)(bao)持很(hen)好(hao)的(de)穩定性(xing)，具有良好(hao)的(de)抗千(qian)擾(rao)性(xing)和(he)抗低頻干(gan)擾(rao)能(neng)力，即使在惡劣的(de)環(huan)境(jing)下(xia)也能(neng)保(bao)(bao)持較好(hao)的(de)性(xing)能(neng)。因此(ci)無線(xian)系統(tong)有較高的(de)可(ke)靠性(xing)。

2.功耗小(xiao)、不受天氣、濕度的影響

無線對講(jiang)系統(tong)在不(bu)(bu)同的(de)環(huan)(huan)(huan)境(jing)中，無線通信(xin)設備和有(you)線通信(xin)設備一(yi)樣(yang)都要進行電(dian)能的(de)消耗(hao)(hao)。當(dang)環(huan)(huan)(huan)境(jing)溫度(du)(du)在-40°C以(yi)下(xia)時，無線通信(xin)設備需(xu)(xu)要每(mei)(mei)天工(gong)作8小(xiao)(xiao)時左(zuo)(zuo)右;當(dang)環(huan)(huan)(huan)境(jing)溫度(du)(du)為(wei)-20°C時，每(mei)(mei)天工(gong)作8小(xiao)(xiao)時左(zuo)(zuo)右;當(dang)環(huan)(huan)(huan)境(jing)溫度(du)(du)為(wei)-30°C時，每(mei)(mei)天工(gong)作4小(xiao)(xiao)時左(zuo)(zuo)右。目前(qian)市場上常見的(de)無線對講(jiang)系統(tong)有(you)兩種(zhong)電(dian)源輸入方式(shi)，一(yi)種(zhong)是(shi)(shi)電(dian)源輸入，另一(yi)種(zhong)是(shi)(shi)電(dian)源輸出。從這兩種(zhong)方式(shi)對系統(tong)的(de)功(gong)(gong)耗(hao)(hao)來看，電(dian)源輸入方式(shi)的(de)功(gong)(gong)耗(hao)(hao)更大一(yi)些，但是(shi)(shi)功(gong)(gong)耗(hao)(hao)很小(xiao)(xiao)。并且設備的(de)工(gong)作環(huan)(huan)(huan)境(jing)不(bu)(bu)同，對電(dian)池的(de)需(xu)(xu)求量也不(bu)(bu)同，所(suo)以(yi)功(gong)(gong)耗(hao)(hao)也不(bu)(bu)同。

3信號不受干擾

在(zai)(zai)一(yi)些(xie)有(you)(you)干(gan)(gan)(gan)擾(rao)(rao)的(de)地(di)方(fang)，例(li)(li)如(ru)野外(wai)、機場、工(gong)廠等，一(yi)般采用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)方(fang)式。分(fen)(fen)(fen)(fen)頻(pin)(pin)方(fang)式的(de)抗(kang)干(gan)(gan)(gan)擾(rao)(rao)能力不強(qiang)，其抗(kang)干(gan)(gan)(gan)擾(rao)(rao)能力主要取(qu)決于射頻(pin)(pin)功(gong)率(lv)的(de)大小。分(fen)(fen)(fen)(fen)頻(pin)(pin)技術(shu)(shu)的(de)功(gong)率(lv)一(yi)般是(shi)50dB在(zai)(zai)50dB左右時(shi)，其抗(kang)干(gan)(gan)(gan)擾(rao)(rao)能力強(qiang)。但由(you)于分(fen)(fen)(fen)(fen)頻(pin)(pin)的(de)干(gan)(gan)(gan)擾(rao)(rao)與(yu)噪(zao)聲(sheng)(sheng)(主要是(shi)周邊(bian)噪(zao)聲(sheng)(sheng))具有(you)(you)很強(qiang)的(de)互通性，當分(fen)(fen)(fen)(fen)頻(pin)(pin)發(fa)(fa)射的(de)信(xin)(xin)(xin)(xin)號(hao)超過50dB時(shi)，其抗(kang)千擾(rao)(rao)能力就會減弱。另外(wai)，在(zai)(zai)一(yi)些(xie)有(you)(you)噪(zao)音的(de)環境中(zhong)使用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技術(shu)(shu)，會使分(fen)(fen)(fen)(fen)頻(pin)(pin)信(xin)(xin)(xin)(xin)號(hao)無(wu)法到達發(fa)(fa)射端(duan)的(de)接(jie)收機或者(zhe)造(zao)成發(fa)(fa)射端(duan)信(xin)(xin)(xin)(xin)號(hao)與(yu)接(jie)收端(duan)信(xin)(xin)(xin)(xin)號(hao)的(de)糟(zao)合而(er)造(zao)成分(fen)(fen)(fen)(fen)頻(pin)(pin)或干(gan)(gan)(gan)擾(rao)(rao)(例(li)(li)如(ru)在(zai)(zai)使用(yong)(yong)室外(wai)電話時(shi)) 。而(er)采用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技術(shu)(shu)的(de)無(wu)線(xian)對(dui)講系(xi)統(tong)由(you)于發(fa)(fa)射功(gong)率(lv)小，分(fen)(fen)(fen)(fen)頻(pin)(pin)后的(de)信(xin)(xin)(xin)(xin)號(hao)強(qiang)度(du)比(bi)有(you)(you)線(xian)對(dui)講系(xi)統(tong)高很多(在(zai)(zai)實際使用(yong)(yong)中(zhong)分(fen)(fen)(fen)(fen)頻(pin)(pin)設(she)備一(yi)般可(ke)以將系(xi)統(tong)信(xin)(xin)(xin)(xin)號(hao)分(fen)(fen)(fen)(fen)頻(pin)(pin)到50dB以上),信(xin)(xin)(xin)(xin)號(hao)不受(shou)干(gan)(gan)(gan)擾(rao)(rao)。如(ru)果采用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技術(shu)(shu)，需要在(zai)(zai)較大的(de)回波功(gong)率(lv)下才能實現信(xin)(xin)(xin)(xin)號(hao)的(de)分(fen)(fen)(fen)(fen)頻(pin)(pin)工(gong)作(如(ru)分(fen)(fen)(fen)(fen)頻(pin)(pin)器發(fa)(fa)射信(xin)(xin)(xin)(xin)號(hao)與(yu)接(jie)收信(xin)(xin)(xin)(xin)號(hao)重疊時(shi)產生的(de)千擾(rao)(rao))和發(fa)(fa)送信(xin)(xin)(xin)(xin)號(hao)強(qiang)度(du)降(jiang)(jiang)低(同頻(pin)(pin)帶(dai)內的(de)兩只天線(xian)對(dui)同一(yi)信(xin)(xin)(xin)(xin)道傳輸的(de)信(xin)(xin)(xin)(xin)號(hao)強(qiang)度(du)基(ji)本一(yi)致);如(ru)果采用(yong)(yong)混響技術(shu)(shu)，則可(ke)以實現對(dui)無(wu)線(xian)信(xin)(xin)(xin)(xin)號(hao)干(gan)(gan)(gan)擾(rao)(rao)的(de)抑(yi)制或降(jiang)(jiang)低。