由(you)于在(zai)(zai)戶(hu)(hu)外(wai)、室內(nei)等區域，無(wu)線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)的(de)信(xin)號(hao)(hao)強度較弱，而且采用(yong)(yong)(yong)(yong)頻率調(diao)制技術（如 MHZ、 NMR、 BSI等）產生的(de)信(xin)號(hao)(hao)傳(chuan)輸時延大，傳(chuan)輸距離遠。因此有線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)不適合在(zai)(zai)戶(hu)(hu)外(wai)環(huan)境(jing)使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)，特(te)別(bie)是在(zai)(zai)冬天及低風速季(ji)節(jie)(jie)使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)。雖然無(wu)線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)也(ye)有著不錯(cuo)的(de)效果。但由(you)于系(xi)(xi)統(tong)(tong)(tong)(tong)工作(zuo)時會有一(yi)定的(de)干(gan)擾，使(shi)(shi)(shi)對(dui)講(jiang)(jiang)(jiang)效果下降，另外(wai)在(zai)(zai)信(xin)號(hao)(hao)較弱時對(dui)用(yong)(yong)(yong)(yong)戶(hu)(hu)語(yu)(yu)音產生了影響。特(te)別(bie)是在(zai)(zai)人員(yuan)復雜(za)、通信(xin)距離較短或(huo)需要較長時間(jian)使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)時。因此，更需要有一(yi)個可(ke)(ke)靠(kao)的(de)無(wu)線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)提供與有線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)一(yi)樣的(de)語(yu)(yu)音信(xin)息與控制。無(wu)線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)具(ju)有很高的(de)靈活性，它能(neng)夠滿(man)足現場中所有環(huan)境(jing)使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)需求并能(neng)隨(sui)時切換（如在(zai)(zai)野外(wai)、戶(hu)(hu)外(wai)電話等),用(yong)(yong)(yong)(yong)戶(hu)(hu)可(ke)(ke)以在(zai)(zai)任何地點使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)、隨(sui)時、隨(sui)地進(jin)行通訊。使(shi)(shi)(shi)用(yong)(yong)(yong)(yong)方便、節(jie)(jie)省成(cheng)本、節(jie)(jie)約費(fei)用(yong)(yong)(yong)(yong)。下面我(wo)們來了解一(yi)下無(wu)線(xian)(xian)對(dui)講(jiang)(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)(tong)它主要是什(shen)么(me)優點？

1.性能穩定，可靠性高

在相(xiang)同無(wu)線傳(chuan)輸(shu)距離下，無(wu)線傳(chuan)輸(shu)信(xin)(xin)號(hao)(hao)(hao)更(geng)穩定(ding)由于(yu)使(shi)用(yong)了功(gong)率(lv)放(fang)大器(qi)來對無(wu)線信(xin)(xin)號(hao)(hao)(hao)進行壓縮和(he)放(fang)大，使(shi)無(wu)線信(xin)(xin)號(hao)(hao)(hao)更(geng)加穩定(ding)可靠(kao)。無(wu)線信(xin)(xin)號(hao)(hao)(hao)在弱電磁環境下也能(neng)(neng)保(bao)持較(jiao)好(hao)的(de)性(xing)能(neng)(neng)。無(wu)線對講(jiang)系(xi)統具有(you)發射(she)功(gong)率(lv)小、抗千(qian)擾(rao)(rao)能(neng)(neng)力強(與有(you)線對講(jiang)系(xi)統比較(jiao))和(he)抗電磁干擾(rao)(rao)能(neng)(neng)力強(與有(you)線對講(jiang)系(xi)統比較(jiao))的(de)特點。無(wu)線對講(jiang)系(xi)統發射(she)信(xin)(xin)號(hao)(hao)(hao)在發射(she)前(qian)和(he)發射(she)后(hou)均能(neng)(neng)保(bao)持良好(hao)的(de)性(xing)能(neng)(neng)，使(shi)用(yong)過(guo)程中，發射(she)信(xin)(xin)號(hao)(hao)(hao)與接收(shou)信(xin)(xin)號(hao)(hao)(hao)完(wan)全不受任何千(qian)擾(rao)(rao)，可保(bao)持很好(hao)的(de)穩定(ding)性(xing)，具有(you)良好(hao)的(de)抗千(qian)擾(rao)(rao)性(xing)和(he)抗低(di)頻干擾(rao)(rao)能(neng)(neng)力，即(ji)使(shi)在惡劣的(de)環境下也能(neng)(neng)保(bao)持較(jiao)好(hao)的(de)性(xing)能(neng)(neng)。因此無(wu)線系(xi)統有(you)較(jiao)高(gao)的(de)可靠(kao)性(xing)。

2.功耗小(xiao)、不受(shou)天氣(qi)、濕度的影響

無線(xian)(xian)對講(jiang)系(xi)統(tong)在不(bu)同的環(huan)境(jing)中，無線(xian)(xian)通(tong)(tong)信設(she)備(bei)(bei)和有(you)線(xian)(xian)通(tong)(tong)信設(she)備(bei)(bei)一樣都要進行電能(neng)的消耗(hao)(hao)(hao)。當環(huan)境(jing)溫(wen)度(du)在-40°C以下(xia)時(shi)(shi)，無線(xian)(xian)通(tong)(tong)信設(she)備(bei)(bei)需要每(mei)天工(gong)作8小(xiao)時(shi)(shi)左(zuo)右(you);當環(huan)境(jing)溫(wen)度(du)為-20°C時(shi)(shi)，每(mei)天工(gong)作8小(xiao)時(shi)(shi)左(zuo)右(you);當環(huan)境(jing)溫(wen)度(du)為-30°C時(shi)(shi)，每(mei)天工(gong)作4小(xiao)時(shi)(shi)左(zuo)右(you)。目(mu)前市場上常見(jian)的無線(xian)(xian)對講(jiang)系(xi)統(tong)有(you)兩種(zhong)電源輸入(ru)方式(shi)，一種(zhong)是電源輸入(ru)，另一種(zhong)是電源輸出。從這(zhe)兩種(zhong)方式(shi)對系(xi)統(tong)的功(gong)耗(hao)(hao)(hao)來看，電源輸入(ru)方式(shi)的功(gong)耗(hao)(hao)(hao)更大一些(xie)，但是功(gong)耗(hao)(hao)(hao)很小(xiao)。并且設(she)備(bei)(bei)的工(gong)作環(huan)境(jing)不(bu)同，對電池的需求量(liang)也不(bu)同，所以功(gong)耗(hao)(hao)(hao)也不(bu)同。

3信號不受干擾

在(zai)(zai)一些(xie)有干(gan)擾(rao)的(de)(de)地方，例如野外、機(ji)場(chang)、工(gong)廠等(deng)，一般采(cai)用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)方式。分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)方式的(de)(de)抗(kang)干(gan)擾(rao)能力(li)(li)不強(qiang)，其(qi)抗(kang)干(gan)擾(rao)能力(li)(li)主(zhu)(zhu)要(yao)(yao)取決于(yu)射(she)頻(pin)(pin)(pin)(pin)(pin)功(gong)率(lv)(lv)的(de)(de)大小。分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技術(shu)(shu)的(de)(de)功(gong)率(lv)(lv)一般是50dB在(zai)(zai)50dB左(zuo)右時，其(qi)抗(kang)干(gan)擾(rao)能力(li)(li)強(qiang)。但由于(yu)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)的(de)(de)干(gan)擾(rao)與噪(zao)聲(sheng)(主(zhu)(zhu)要(yao)(yao)是周(zhou)邊噪(zao)聲(sheng))具有很強(qiang)的(de)(de)互通(tong)性，當分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)發射(she)的(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)超過50dB時，其(qi)抗(kang)千擾(rao)能力(li)(li)就(jiu)會減(jian)弱。另外，在(zai)(zai)一些(xie)有噪(zao)音的(de)(de)環境中使(shi)用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技術(shu)(shu)，會使(shi)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)信(xin)(xin)(xin)號(hao)(hao)(hao)無(wu)(wu)法(fa)到(dao)達發射(she)端(duan)的(de)(de)接收(shou)機(ji)或(huo)者造成發射(she)端(duan)信(xin)(xin)(xin)號(hao)(hao)(hao)與接收(shou)端(duan)信(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)糟合而(er)造成分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)或(huo)干(gan)擾(rao)(例如在(zai)(zai)使(shi)用(yong)(yong)(yong)室外電話(hua)時) 。而(er)采(cai)用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技術(shu)(shu)的(de)(de)無(wu)(wu)線對講(jiang)(jiang)系(xi)統由于(yu)發射(she)功(gong)率(lv)(lv)小，分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)后的(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)強(qiang)度(du)比有線對講(jiang)(jiang)系(xi)統高(gao)很多(在(zai)(zai)實際(ji)使(shi)用(yong)(yong)(yong)中分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)設備一般可以將(jiang)系(xi)統信(xin)(xin)(xin)號(hao)(hao)(hao)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)到(dao)50dB以上),信(xin)(xin)(xin)號(hao)(hao)(hao)不受干(gan)擾(rao)。如果采(cai)用(yong)(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)技術(shu)(shu)，需要(yao)(yao)在(zai)(zai)較大的(de)(de)回波功(gong)率(lv)(lv)下(xia)才能實現(xian)信(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)工(gong)作(zuo)(如分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)器發射(she)信(xin)(xin)(xin)號(hao)(hao)(hao)與接收(shou)信(xin)(xin)(xin)號(hao)(hao)(hao)重疊時產(chan)生的(de)(de)千擾(rao))和發送信(xin)(xin)(xin)號(hao)(hao)(hao)強(qiang)度(du)降低(di)(同(tong)頻(pin)(pin)(pin)(pin)(pin)帶內的(de)(de)兩只(zhi)天線對同(tong)一信(xin)(xin)(xin)道(dao)傳輸(shu)的(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)強(qiang)度(du)基本一致);如果采(cai)用(yong)(yong)(yong)混響技術(shu)(shu)，則可以實現(xian)對無(wu)(wu)線信(xin)(xin)(xin)號(hao)(hao)(hao)干(gan)擾(rao)的(de)(de)抑制(zhi)或(huo)降低(di)。