由于在(zai)(zai)戶(hu)(hu)外(wai)、室內等(deng)(deng)區域，無線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)的(de)信號(hao)強度較(jiao)弱，而且采用(yong)頻率(lv)調制技術（如 MHZ、 NMR、 BSI等(deng)(deng)）產生的(de)信號(hao)傳(chuan)輸(shu)(shu)時延(yan)大，傳(chuan)輸(shu)(shu)距離遠。因此(ci)有(you)線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)不適(shi)合在(zai)(zai)戶(hu)(hu)外(wai)環境(jing)使用(yong)，特別(bie)(bie)是(shi)(shi)在(zai)(zai)冬天及低風速(su)季節使用(yong)。雖然無線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)也有(you)著不錯的(de)效果。但(dan)由于系(xi)(xi)統(tong)工作(zuo)時會有(you)一(yi)定的(de)干(gan)擾，使對(dui)講(jiang)(jiang)(jiang)效果下降(jiang)，另外(wai)在(zai)(zai)信號(hao)較(jiao)弱時對(dui)用(yong)戶(hu)(hu)語音產生了影(ying)響。特別(bie)(bie)是(shi)(shi)在(zai)(zai)人(ren)員(yuan)復雜、通(tong)信距離較(jiao)短或需(xu)要較(jiao)長(chang)時間使用(yong)時。因此(ci)，更需(xu)要有(you)一(yi)個可(ke)靠的(de)無線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)提供與有(you)線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)一(yi)樣的(de)語音信息與控制。無線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)具有(you)很(hen)高的(de)靈活性(xing)，它(ta)能(neng)夠滿足現場中所有(you)環境(jing)使用(yong)需(xu)求并能(neng)隨時切換(huan)（如在(zai)(zai)野外(wai)、戶(hu)(hu)外(wai)電話等(deng)(deng)),用(yong)戶(hu)(hu)可(ke)以在(zai)(zai)任何(he)地點(dian)使用(yong)、隨時、隨地進行(xing)通(tong)訊。使用(yong)方(fang)便、節省成本、節約費用(yong)。下面我(wo)們來了解一(yi)下無線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)它(ta)主要是(shi)(shi)什么優點(dian)？

1.性能穩定，可(ke)靠性高

在相同無(wu)(wu)線(xian)(xian)(xian)(xian)(xian)傳輸距(ju)離(li)下，無(wu)(wu)線(xian)(xian)(xian)(xian)(xian)傳輸信(xin)(xin)號(hao)更(geng)穩定(ding)由(you)于使用了功(gong)率放大(da)器來對(dui)無(wu)(wu)線(xian)(xian)(xian)(xian)(xian)信(xin)(xin)號(hao)進行壓縮和(he)(he)放大(da)，使無(wu)(wu)線(xian)(xian)(xian)(xian)(xian)信(xin)(xin)號(hao)更(geng)加穩定(ding)可(ke)靠(kao)。無(wu)(wu)線(xian)(xian)(xian)(xian)(xian)信(xin)(xin)號(hao)在弱電磁(ci)環境(jing)下也(ye)能(neng)保(bao)持(chi)較(jiao)(jiao)好的(de)(de)性(xing)(xing)能(neng)。無(wu)(wu)線(xian)(xian)(xian)(xian)(xian)對(dui)講(jiang)系(xi)(xi)統具(ju)有(you)發(fa)(fa)射(she)功(gong)率小、抗千擾(rao)(rao)(rao)能(neng)力強(qiang)(與有(you)線(xian)(xian)(xian)(xian)(xian)對(dui)講(jiang)系(xi)(xi)統比較(jiao)(jiao))和(he)(he)抗電磁(ci)干擾(rao)(rao)(rao)能(neng)力強(qiang)(與有(you)線(xian)(xian)(xian)(xian)(xian)對(dui)講(jiang)系(xi)(xi)統比較(jiao)(jiao))的(de)(de)特點(dian)。無(wu)(wu)線(xian)(xian)(xian)(xian)(xian)對(dui)講(jiang)系(xi)(xi)統發(fa)(fa)射(she)信(xin)(xin)號(hao)在發(fa)(fa)射(she)前(qian)和(he)(he)發(fa)(fa)射(she)后均能(neng)保(bao)持(chi)良(liang)好的(de)(de)性(xing)(xing)能(neng)，使用過(guo)程(cheng)中，發(fa)(fa)射(she)信(xin)(xin)號(hao)與接收信(xin)(xin)號(hao)完全不受任何千擾(rao)(rao)(rao)，可(ke)保(bao)持(chi)很(hen)好的(de)(de)穩定(ding)性(xing)(xing)，具(ju)有(you)良(liang)好的(de)(de)抗千擾(rao)(rao)(rao)性(xing)(xing)和(he)(he)抗低頻干擾(rao)(rao)(rao)能(neng)力，即使在惡(e)劣的(de)(de)環境(jing)下也(ye)能(neng)保(bao)持(chi)較(jiao)(jiao)好的(de)(de)性(xing)(xing)能(neng)。因(yin)此無(wu)(wu)線(xian)(xian)(xian)(xian)(xian)系(xi)(xi)統有(you)較(jiao)(jiao)高的(de)(de)可(ke)靠(kao)性(xing)(xing)。

2.功耗小、不(bu)受天氣、濕度的(de)影響(xiang)

無(wu)線(xian)對講系(xi)統(tong)在不同的(de)(de)(de)(de)環(huan)境(jing)(jing)中，無(wu)線(xian)通信(xin)設備(bei)(bei)和有線(xian)通信(xin)設備(bei)(bei)一(yi)樣都要進行電(dian)(dian)(dian)能的(de)(de)(de)(de)消(xiao)耗。當環(huan)境(jing)(jing)溫度在-40°C以下時(shi)，無(wu)線(xian)通信(xin)設備(bei)(bei)需要每天工(gong)(gong)作(zuo)(zuo)8小(xiao)時(shi)左(zuo)右;當環(huan)境(jing)(jing)溫度為-20°C時(shi)，每天工(gong)(gong)作(zuo)(zuo)8小(xiao)時(shi)左(zuo)右;當環(huan)境(jing)(jing)溫度為-30°C時(shi)，每天工(gong)(gong)作(zuo)(zuo)4小(xiao)時(shi)左(zuo)右。目前市場上常見的(de)(de)(de)(de)無(wu)線(xian)對講系(xi)統(tong)有兩種(zhong)(zhong)電(dian)(dian)(dian)源(yuan)輸入(ru)方式(shi)，一(yi)種(zhong)(zhong)是電(dian)(dian)(dian)源(yuan)輸入(ru)，另一(yi)種(zhong)(zhong)是電(dian)(dian)(dian)源(yuan)輸出。從(cong)這兩種(zhong)(zhong)方式(shi)對系(xi)統(tong)的(de)(de)(de)(de)功(gong)(gong)耗來看，電(dian)(dian)(dian)源(yuan)輸入(ru)方式(shi)的(de)(de)(de)(de)功(gong)(gong)耗更(geng)大一(yi)些，但是功(gong)(gong)耗很(hen)小(xiao)。并且設備(bei)(bei)的(de)(de)(de)(de)工(gong)(gong)作(zuo)(zuo)環(huan)境(jing)(jing)不同，對電(dian)(dian)(dian)池的(de)(de)(de)(de)需求量也不同，所(suo)以功(gong)(gong)耗也不同。

3信號不受干擾

在(zai)(zai)一(yi)(yi)些有(you)干(gan)(gan)(gan)擾(rao)(rao)的(de)(de)地方，例(li)如(ru)野外(wai)、機場、工廠等，一(yi)(yi)般(ban)采(cai)用(yong)(yong)分(fen)(fen)頻(pin)(pin)方式(shi)。分(fen)(fen)頻(pin)(pin)方式(shi)的(de)(de)抗(kang)干(gan)(gan)(gan)擾(rao)(rao)能(neng)力(li)不強，其抗(kang)干(gan)(gan)(gan)擾(rao)(rao)能(neng)力(li)主(zhu)要(yao)取決于射(she)頻(pin)(pin)功(gong)率(lv)的(de)(de)大小(xiao)(xiao)。分(fen)(fen)頻(pin)(pin)技(ji)(ji)術(shu)的(de)(de)功(gong)率(lv)一(yi)(yi)般(ban)是(shi)50dB在(zai)(zai)50dB左右時，其抗(kang)干(gan)(gan)(gan)擾(rao)(rao)能(neng)力(li)強。但由于分(fen)(fen)頻(pin)(pin)的(de)(de)干(gan)(gan)(gan)擾(rao)(rao)與噪聲(主(zhu)要(yao)是(shi)周(zhou)邊噪聲)具(ju)有(you)很強的(de)(de)互通(tong)性，當分(fen)(fen)頻(pin)(pin)發(fa)射(she)的(de)(de)信(xin)號(hao)(hao)超過50dB時，其抗(kang)千擾(rao)(rao)能(neng)力(li)就會減(jian)弱。另外(wai)，在(zai)(zai)一(yi)(yi)些有(you)噪音的(de)(de)環境中使用(yong)(yong)分(fen)(fen)頻(pin)(pin)技(ji)(ji)術(shu)，會使分(fen)(fen)頻(pin)(pin)信(xin)號(hao)(hao)無法到(dao)達發(fa)射(she)端的(de)(de)接收(shou)機或者(zhe)造成(cheng)發(fa)射(she)端信(xin)號(hao)(hao)與接收(shou)端信(xin)號(hao)(hao)的(de)(de)糟(zao)合而(er)造成(cheng)分(fen)(fen)頻(pin)(pin)或干(gan)(gan)(gan)擾(rao)(rao)(例(li)如(ru)在(zai)(zai)使用(yong)(yong)室外(wai)電(dian)話(hua)時) 。而(er)采(cai)用(yong)(yong)分(fen)(fen)頻(pin)(pin)技(ji)(ji)術(shu)的(de)(de)無線(xian)對講系(xi)統(tong)由于發(fa)射(she)功(gong)率(lv)小(xiao)(xiao)，分(fen)(fen)頻(pin)(pin)后的(de)(de)信(xin)號(hao)(hao)強度(du)比有(you)線(xian)對講系(xi)統(tong)高很多(在(zai)(zai)實際使用(yong)(yong)中分(fen)(fen)頻(pin)(pin)設備一(yi)(yi)般(ban)可(ke)以將(jiang)系(xi)統(tong)信(xin)號(hao)(hao)分(fen)(fen)頻(pin)(pin)到(dao)50dB以上(shang)),信(xin)號(hao)(hao)不受干(gan)(gan)(gan)擾(rao)(rao)。如(ru)果(guo)采(cai)用(yong)(yong)分(fen)(fen)頻(pin)(pin)技(ji)(ji)術(shu)，需要(yao)在(zai)(zai)較大的(de)(de)回波功(gong)率(lv)下才能(neng)實現信(xin)號(hao)(hao)的(de)(de)分(fen)(fen)頻(pin)(pin)工作(zuo)(如(ru)分(fen)(fen)頻(pin)(pin)器發(fa)射(she)信(xin)號(hao)(hao)與接收(shou)信(xin)號(hao)(hao)重疊時產生的(de)(de)千擾(rao)(rao))和(he)發(fa)送信(xin)號(hao)(hao)強度(du)降低(同頻(pin)(pin)帶內的(de)(de)兩只天線(xian)對同一(yi)(yi)信(xin)道傳輸(shu)的(de)(de)信(xin)號(hao)(hao)強度(du)基(ji)本一(yi)(yi)致);如(ru)果(guo)采(cai)用(yong)(yong)混(hun)響技(ji)(ji)術(shu)，則可(ke)以實現對無線(xian)信(xin)號(hao)(hao)干(gan)(gan)(gan)擾(rao)(rao)的(de)(de)抑(yi)制或降低。