由(you)于(yu)(yu)在(zai)(zai)(zai)(zai)戶(hu)(hu)外、室內等(deng)區域，無(wu)線對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)(tong)的(de)(de)信(xin)號(hao)強度較弱，而且采用(yong)頻率調制技術(shu)（如 MHZ、 NMR、 BSI等(deng)）產生(sheng)的(de)(de)信(xin)號(hao)傳輸(shu)時(shi)(shi)延大(da)，傳輸(shu)距離(li)遠。因此有(you)線對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)(tong)不適合(he)在(zai)(zai)(zai)(zai)戶(hu)(hu)外環(huan)境使(shi)用(yong)，特別是(shi)在(zai)(zai)(zai)(zai)冬天及(ji)低風速季節(jie)(jie)使(shi)用(yong)。雖然無(wu)線對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)(tong)也有(you)著不錯的(de)(de)效果(guo)(guo)。但(dan)由(you)于(yu)(yu)系(xi)統(tong)(tong)工作時(shi)(shi)會有(you)一(yi)(yi)定的(de)(de)干擾，使(shi)對(dui)講(jiang)(jiang)(jiang)效果(guo)(guo)下降，另(ling)外在(zai)(zai)(zai)(zai)信(xin)號(hao)較弱時(shi)(shi)對(dui)用(yong)戶(hu)(hu)語(yu)音產生(sheng)了影響。特別是(shi)在(zai)(zai)(zai)(zai)人員復雜、通信(xin)距離(li)較短或需(xu)(xu)要(yao)較長時(shi)(shi)間使(shi)用(yong)時(shi)(shi)。因此，更需(xu)(xu)要(yao)有(you)一(yi)(yi)個可(ke)靠的(de)(de)無(wu)線對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)(tong)提供與(yu)有(you)線對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)(tong)一(yi)(yi)樣的(de)(de)語(yu)音信(xin)息與(yu)控(kong)制。無(wu)線對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)(tong)具有(you)很高的(de)(de)靈活性(xing)，它能夠滿(man)足現場中所有(you)環(huan)境使(shi)用(yong)需(xu)(xu)求并能隨時(shi)(shi)切換（如在(zai)(zai)(zai)(zai)野外、戶(hu)(hu)外電話等(deng)),用(yong)戶(hu)(hu)可(ke)以在(zai)(zai)(zai)(zai)任(ren)何(he)地點使(shi)用(yong)、隨時(shi)(shi)、隨地進(jin)行通訊。使(shi)用(yong)方便、節(jie)(jie)省成本(ben)、節(jie)(jie)約費(fei)用(yong)。下面我們來了解一(yi)(yi)下無(wu)線對(dui)講(jiang)(jiang)(jiang)系(xi)統(tong)(tong)它主(zhu)要(yao)是(shi)什么優點？

1.性(xing)能(neng)穩(wen)定(ding)，可靠性(xing)高

在相(xiang)同無(wu)(wu)(wu)線(xian)(xian)傳輸距離(li)下(xia)，無(wu)(wu)(wu)線(xian)(xian)傳輸信(xin)號(hao)(hao)更(geng)穩(wen)定(ding)由于(yu)使用(yong)(yong)了功率放大器來對(dui)無(wu)(wu)(wu)線(xian)(xian)信(xin)號(hao)(hao)進行壓縮和(he)放大，使無(wu)(wu)(wu)線(xian)(xian)信(xin)號(hao)(hao)更(geng)加穩(wen)定(ding)可靠。無(wu)(wu)(wu)線(xian)(xian)信(xin)號(hao)(hao)在弱電磁(ci)環境(jing)下(xia)也能(neng)(neng)保(bao)(bao)持(chi)較(jiao)(jiao)好的性(xing)能(neng)(neng)。無(wu)(wu)(wu)線(xian)(xian)對(dui)講系(xi)統具有發(fa)射功率小、抗(kang)千(qian)擾(rao)(rao)能(neng)(neng)力(li)強(與有線(xian)(xian)對(dui)講系(xi)統比(bi)較(jiao)(jiao))和(he)抗(kang)電磁(ci)干擾(rao)(rao)能(neng)(neng)力(li)強(與有線(xian)(xian)對(dui)講系(xi)統比(bi)較(jiao)(jiao))的特點(dian)。無(wu)(wu)(wu)線(xian)(xian)對(dui)講系(xi)統發(fa)射信(xin)號(hao)(hao)在發(fa)射前和(he)發(fa)射后(hou)均能(neng)(neng)保(bao)(bao)持(chi)良(liang)好的性(xing)能(neng)(neng)，使用(yong)(yong)過程(cheng)中，發(fa)射信(xin)號(hao)(hao)與接收(shou)信(xin)號(hao)(hao)完全(quan)不受任何千(qian)擾(rao)(rao)，可保(bao)(bao)持(chi)很好的穩(wen)定(ding)性(xing)，具有良(liang)好的抗(kang)千(qian)擾(rao)(rao)性(xing)和(he)抗(kang)低(di)頻(pin)干擾(rao)(rao)能(neng)(neng)力(li)，即使在惡劣的環境(jing)下(xia)也能(neng)(neng)保(bao)(bao)持(chi)較(jiao)(jiao)好的性(xing)能(neng)(neng)。因(yin)此(ci)無(wu)(wu)(wu)線(xian)(xian)系(xi)統有較(jiao)(jiao)高的可靠性(xing)。

2.功耗小、不(bu)受天氣、濕度(du)的影響

無線(xian)對(dui)講(jiang)系統(tong)在不(bu)(bu)同的(de)環(huan)(huan)境(jing)中，無線(xian)通(tong)信(xin)(xin)(xin)設(she)備和有線(xian)通(tong)信(xin)(xin)(xin)設(she)備一(yi)樣(yang)都要進行電(dian)能的(de)消(xiao)耗(hao)。當(dang)環(huan)(huan)境(jing)溫(wen)度(du)在-40°C以下時(shi)(shi)，無線(xian)通(tong)信(xin)(xin)(xin)設(she)備需要每(mei)天(tian)(tian)工作8小(xiao)時(shi)(shi)左右;當(dang)環(huan)(huan)境(jing)溫(wen)度(du)為(wei)-20°C時(shi)(shi)，每(mei)天(tian)(tian)工作8小(xiao)時(shi)(shi)左右;當(dang)環(huan)(huan)境(jing)溫(wen)度(du)為(wei)-30°C時(shi)(shi)，每(mei)天(tian)(tian)工作4小(xiao)時(shi)(shi)左右。目前市(shi)場(chang)上(shang)常見(jian)的(de)無線(xian)對(dui)講(jiang)系統(tong)有兩(liang)種(zhong)(zhong)電(dian)源(yuan)輸入(ru)方(fang)式，一(yi)種(zhong)(zhong)是電(dian)源(yuan)輸入(ru)，另一(yi)種(zhong)(zhong)是電(dian)源(yuan)輸出。從(cong)這兩(liang)種(zhong)(zhong)方(fang)式對(dui)系統(tong)的(de)功(gong)耗(hao)來看，電(dian)源(yuan)輸入(ru)方(fang)式的(de)功(gong)耗(hao)更大一(yi)些，但(dan)是功(gong)耗(hao)很小(xiao)。并(bing)且設(she)備的(de)工作環(huan)(huan)境(jing)不(bu)(bu)同，對(dui)電(dian)池(chi)的(de)需求(qiu)量也不(bu)(bu)同，所以功(gong)耗(hao)也不(bu)(bu)同。

3信號不受干擾

在(zai)一(yi)(yi)些有干(gan)擾(rao)(rao)(rao)的(de)(de)(de)地方(fang)(fang)，例(li)如(ru)野外(wai)、機場、工(gong)廠等，一(yi)(yi)般采(cai)用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)方(fang)(fang)式。分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)方(fang)(fang)式的(de)(de)(de)抗干(gan)擾(rao)(rao)(rao)能(neng)(neng)力(li)不強，其抗干(gan)擾(rao)(rao)(rao)能(neng)(neng)力(li)主要取決(jue)于(yu)射(she)頻(pin)(pin)(pin)(pin)(pin)功(gong)(gong)率(lv)的(de)(de)(de)大(da)小。分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技(ji)術(shu)(shu)的(de)(de)(de)功(gong)(gong)率(lv)一(yi)(yi)般是(shi)(shi)50dB在(zai)50dB左右時(shi)(shi)(shi)，其抗干(gan)擾(rao)(rao)(rao)能(neng)(neng)力(li)強。但由于(yu)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)的(de)(de)(de)干(gan)擾(rao)(rao)(rao)與(yu)(yu)噪(zao)聲(sheng)(主要是(shi)(shi)周邊噪(zao)聲(sheng))具有很強的(de)(de)(de)互通性，當分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)發(fa)射(she)的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)超過50dB時(shi)(shi)(shi)，其抗千擾(rao)(rao)(rao)能(neng)(neng)力(li)就會減弱。另外(wai)，在(zai)一(yi)(yi)些有噪(zao)音的(de)(de)(de)環境中(zhong)使(shi)(shi)用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技(ji)術(shu)(shu)，會使(shi)(shi)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)無法到達(da)發(fa)射(she)端(duan)的(de)(de)(de)接收(shou)(shou)機或者(zhe)造成發(fa)射(she)端(duan)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)與(yu)(yu)接收(shou)(shou)端(duan)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)糟合而造成分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)或干(gan)擾(rao)(rao)(rao)(例(li)如(ru)在(zai)使(shi)(shi)用(yong)(yong)(yong)室外(wai)電話時(shi)(shi)(shi)) 。而采(cai)用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技(ji)術(shu)(shu)的(de)(de)(de)無線對(dui)講系(xi)統由于(yu)發(fa)射(she)功(gong)(gong)率(lv)小，分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)后的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)強度比有線對(dui)講系(xi)統高很多(在(zai)實際使(shi)(shi)用(yong)(yong)(yong)中(zhong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)設備一(yi)(yi)般可以(yi)將系(xi)統信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)到50dB以(yi)上),信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)不受(shou)干(gan)擾(rao)(rao)(rao)。如(ru)果(guo)采(cai)用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技(ji)術(shu)(shu)，需要在(zai)較大(da)的(de)(de)(de)回波功(gong)(gong)率(lv)下才能(neng)(neng)實現信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)工(gong)作(如(ru)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)器發(fa)射(she)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)與(yu)(yu)接收(shou)(shou)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)重疊時(shi)(shi)(shi)產生的(de)(de)(de)千擾(rao)(rao)(rao))和發(fa)送信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)強度降低(di)(同(tong)頻(pin)(pin)(pin)(pin)(pin)帶內的(de)(de)(de)兩只天(tian)線對(dui)同(tong)一(yi)(yi)信(xin)(xin)(xin)(xin)道(dao)傳輸(shu)的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)強度基(ji)本一(yi)(yi)致);如(ru)果(guo)采(cai)用(yong)(yong)(yong)混(hun)響技(ji)術(shu)(shu)，則可以(yi)實現對(dui)無線信(xin)(xin)(xin)(xin)號(hao)(hao)(hao)干(gan)擾(rao)(rao)(rao)的(de)(de)(de)抑制或降低(di)。