由(you)于在(zai)(zai)(zai)(zai)戶(hu)外、室內等區域，無(wu)線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)的(de)信(xin)號(hao)強(qiang)度較(jiao)弱，而且(qie)采用(yong)(yong)(yong)(yong)頻(pin)率調制技術（如 MHZ、 NMR、 BSI等）產(chan)生的(de)信(xin)號(hao)傳(chuan)輸(shu)時(shi)延(yan)大(da)，傳(chuan)輸(shu)距(ju)離(li)遠。因(yin)此有(you)(you)(you)線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)不適合在(zai)(zai)(zai)(zai)戶(hu)外環境(jing)使(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)，特別是(shi)(shi)在(zai)(zai)(zai)(zai)冬天(tian)及(ji)低(di)風速(su)季節(jie)使(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)。雖(sui)然無(wu)線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)也(ye)有(you)(you)(you)著不錯的(de)效果。但由(you)于系(xi)(xi)統(tong)(tong)(tong)工作時(shi)會有(you)(you)(you)一(yi)定的(de)干擾，使(shi)(shi)(shi)(shi)(shi)對(dui)講(jiang)(jiang)效果下(xia)降，另外在(zai)(zai)(zai)(zai)信(xin)號(hao)較(jiao)弱時(shi)對(dui)用(yong)(yong)(yong)(yong)戶(hu)語(yu)音產(chan)生了(le)影響。特別是(shi)(shi)在(zai)(zai)(zai)(zai)人員復雜、通(tong)信(xin)距(ju)離(li)較(jiao)短或需要較(jiao)長時(shi)間使(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)時(shi)。因(yin)此，更需要有(you)(you)(you)一(yi)個(ge)可(ke)靠的(de)無(wu)線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)提(ti)供(gong)與有(you)(you)(you)線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)一(yi)樣(yang)的(de)語(yu)音信(xin)息(xi)與控制。無(wu)線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)具(ju)有(you)(you)(you)很高的(de)靈(ling)活性(xing)，它能(neng)夠滿足現場中(zhong)所有(you)(you)(you)環境(jing)使(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)需求(qiu)并能(neng)隨(sui)時(shi)切(qie)換(huan)（如在(zai)(zai)(zai)(zai)野外、戶(hu)外電話等),用(yong)(yong)(yong)(yong)戶(hu)可(ke)以在(zai)(zai)(zai)(zai)任(ren)何(he)地點(dian)使(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)、隨(sui)時(shi)、隨(sui)地進行通(tong)訊。使(shi)(shi)(shi)(shi)(shi)用(yong)(yong)(yong)(yong)方(fang)便、節(jie)省成本、節(jie)約費用(yong)(yong)(yong)(yong)。下(xia)面我(wo)們來了(le)解一(yi)下(xia)無(wu)線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)它主要是(shi)(shi)什么(me)優點(dian)？

1.性(xing)能穩定(ding)，可靠(kao)性(xing)高

在(zai)相同無(wu)線(xian)(xian)(xian)傳(chuan)輸(shu)距離下(xia)，無(wu)線(xian)(xian)(xian)傳(chuan)輸(shu)信(xin)(xin)號更(geng)穩(wen)定由(you)于使(shi)用了功(gong)率(lv)放(fang)大器來(lai)對(dui)(dui)無(wu)線(xian)(xian)(xian)信(xin)(xin)號進行壓縮和放(fang)大，使(shi)無(wu)線(xian)(xian)(xian)信(xin)(xin)號更(geng)加(jia)穩(wen)定可(ke)(ke)靠。無(wu)線(xian)(xian)(xian)信(xin)(xin)號在(zai)弱電(dian)磁環境下(xia)也(ye)能(neng)保(bao)持(chi)較好的(de)(de)(de)(de)性(xing)能(neng)。無(wu)線(xian)(xian)(xian)對(dui)(dui)講系(xi)統(tong)(tong)具(ju)有(you)發射(she)(she)功(gong)率(lv)小、抗(kang)(kang)千擾(rao)(rao)能(neng)力(li)強(與有(you)線(xian)(xian)(xian)對(dui)(dui)講系(xi)統(tong)(tong)比較)和抗(kang)(kang)電(dian)磁干(gan)擾(rao)(rao)能(neng)力(li)強(與有(you)線(xian)(xian)(xian)對(dui)(dui)講系(xi)統(tong)(tong)比較)的(de)(de)(de)(de)特(te)點。無(wu)線(xian)(xian)(xian)對(dui)(dui)講系(xi)統(tong)(tong)發射(she)(she)信(xin)(xin)號在(zai)發射(she)(she)前和發射(she)(she)后均(jun)能(neng)保(bao)持(chi)良(liang)好的(de)(de)(de)(de)性(xing)能(neng)，使(shi)用過程中，發射(she)(she)信(xin)(xin)號與接收信(xin)(xin)號完全不受任何千擾(rao)(rao)，可(ke)(ke)保(bao)持(chi)很好的(de)(de)(de)(de)穩(wen)定性(xing)，具(ju)有(you)良(liang)好的(de)(de)(de)(de)抗(kang)(kang)千擾(rao)(rao)性(xing)和抗(kang)(kang)低頻干(gan)擾(rao)(rao)能(neng)力(li)，即使(shi)在(zai)惡劣(lie)的(de)(de)(de)(de)環境下(xia)也(ye)能(neng)保(bao)持(chi)較好的(de)(de)(de)(de)性(xing)能(neng)。因此無(wu)線(xian)(xian)(xian)系(xi)統(tong)(tong)有(you)較高(gao)的(de)(de)(de)(de)可(ke)(ke)靠性(xing)。

2.功(gong)耗小、不受天氣、濕度(du)的影響(xiang)

無線(xian)對講系(xi)統(tong)在不同的(de)(de)(de)(de)環(huan)境(jing)中，無線(xian)通(tong)(tong)信設備和有(you)線(xian)通(tong)(tong)信設備一樣都要進行電(dian)能的(de)(de)(de)(de)消耗(hao)。當環(huan)境(jing)溫度(du)在-40°C以下時(shi)(shi)，無線(xian)通(tong)(tong)信設備需要每(mei)天工作8小時(shi)(shi)左右;當環(huan)境(jing)溫度(du)為-20°C時(shi)(shi)，每(mei)天工作8小時(shi)(shi)左右;當環(huan)境(jing)溫度(du)為-30°C時(shi)(shi)，每(mei)天工作4小時(shi)(shi)左右。目前(qian)市場(chang)上常見的(de)(de)(de)(de)無線(xian)對講系(xi)統(tong)有(you)兩(liang)種電(dian)源輸(shu)入(ru)方式，一種是(shi)電(dian)源輸(shu)入(ru)，另一種是(shi)電(dian)源輸(shu)出(chu)。從(cong)這兩(liang)種方式對系(xi)統(tong)的(de)(de)(de)(de)功(gong)耗(hao)來看，電(dian)源輸(shu)入(ru)方式的(de)(de)(de)(de)功(gong)耗(hao)更(geng)大(da)一些，但是(shi)功(gong)耗(hao)很(hen)小。并且設備的(de)(de)(de)(de)工作環(huan)境(jing)不同，對電(dian)池的(de)(de)(de)(de)需求量也(ye)不同，所(suo)以功(gong)耗(hao)也(ye)不同。

3信號不受干擾

在(zai)一(yi)(yi)(yi)些有干(gan)擾(rao)的(de)(de)(de)(de)(de)(de)地方，例如(ru)野(ye)外、機(ji)場、工廠等，一(yi)(yi)(yi)般采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)方式。分(fen)(fen)(fen)頻(pin)(pin)(pin)方式的(de)(de)(de)(de)(de)(de)抗(kang)(kang)干(gan)擾(rao)能(neng)力(li)不強，其(qi)抗(kang)(kang)干(gan)擾(rao)能(neng)力(li)主(zhu)要(yao)(yao)取(qu)決于射(she)頻(pin)(pin)(pin)功(gong)率的(de)(de)(de)(de)(de)(de)大小。分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術的(de)(de)(de)(de)(de)(de)功(gong)率一(yi)(yi)(yi)般是50dB在(zai)50dB左右(you)時，其(qi)抗(kang)(kang)干(gan)擾(rao)能(neng)力(li)強。但由于分(fen)(fen)(fen)頻(pin)(pin)(pin)的(de)(de)(de)(de)(de)(de)干(gan)擾(rao)與噪聲(主(zhu)要(yao)(yao)是周邊噪聲)具(ju)有很強的(de)(de)(de)(de)(de)(de)互(hu)通(tong)性，當分(fen)(fen)(fen)頻(pin)(pin)(pin)發射(she)的(de)(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)超過50dB時，其(qi)抗(kang)(kang)千擾(rao)能(neng)力(li)就會減(jian)弱。另(ling)外，在(zai)一(yi)(yi)(yi)些有噪音的(de)(de)(de)(de)(de)(de)環境中使用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術，會使分(fen)(fen)(fen)頻(pin)(pin)(pin)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)無法到達(da)發射(she)端的(de)(de)(de)(de)(de)(de)接收機(ji)或(huo)者造成發射(she)端信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)與接收端信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)(de)(de)(de)糟合而(er)造成分(fen)(fen)(fen)頻(pin)(pin)(pin)或(huo)干(gan)擾(rao)(例如(ru)在(zai)使用(yong)(yong)室外電話時) 。而(er)采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術的(de)(de)(de)(de)(de)(de)無線對講(jiang)系(xi)統(tong)由于發射(she)功(gong)率小，分(fen)(fen)(fen)頻(pin)(pin)(pin)后的(de)(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)強度比(bi)有線對講(jiang)系(xi)統(tong)高(gao)很多(在(zai)實際使用(yong)(yong)中分(fen)(fen)(fen)頻(pin)(pin)(pin)設(she)備一(yi)(yi)(yi)般可以(yi)將系(xi)統(tong)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)分(fen)(fen)(fen)頻(pin)(pin)(pin)到50dB以(yi)上),信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)不受干(gan)擾(rao)。如(ru)果采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術，需要(yao)(yao)在(zai)較大的(de)(de)(de)(de)(de)(de)回波功(gong)率下才(cai)能(neng)實現(xian)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)(de)(de)(de)分(fen)(fen)(fen)頻(pin)(pin)(pin)工作(如(ru)分(fen)(fen)(fen)頻(pin)(pin)(pin)器(qi)發射(she)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)與接收信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)重疊時產(chan)生的(de)(de)(de)(de)(de)(de)千擾(rao))和發送信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)強度降(jiang)低(di)(同(tong)頻(pin)(pin)(pin)帶內的(de)(de)(de)(de)(de)(de)兩(liang)只(zhi)天(tian)線對同(tong)一(yi)(yi)(yi)信(xin)(xin)(xin)(xin)(xin)道(dao)傳輸的(de)(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)強度基本一(yi)(yi)(yi)致);如(ru)果采(cai)用(yong)(yong)混(hun)響(xiang)技(ji)術，則可以(yi)實現(xian)對無線信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)干(gan)擾(rao)的(de)(de)(de)(de)(de)(de)抑制或(huo)降(jiang)低(di)。