由(you)于在戶(hu)外(wai)、室內(nei)等區域，無線(xian)對(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)的(de)(de)(de)信號強度較弱，而且(qie)采用(yong)(yong)頻率調制技術（如 MHZ、 NMR、 BSI等）產(chan)生的(de)(de)(de)信號傳輸時(shi)(shi)延(yan)大，傳輸距離(li)遠(yuan)。因此有(you)線(xian)對(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)不適(shi)合(he)在戶(hu)外(wai)環(huan)(huan)境(jing)使(shi)(shi)用(yong)(yong)，特別(bie)是在冬天(tian)及(ji)低風速季節(jie)使(shi)(shi)用(yong)(yong)。雖(sui)然無線(xian)對(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)也(ye)有(you)著不錯的(de)(de)(de)效果(guo)。但由(you)于系(xi)(xi)統(tong)工(gong)作時(shi)(shi)會有(you)一(yi)(yi)定(ding)的(de)(de)(de)干擾，使(shi)(shi)對(dui)(dui)講(jiang)(jiang)效果(guo)下降(jiang)，另外(wai)在信號較弱時(shi)(shi)對(dui)(dui)用(yong)(yong)戶(hu)語音(yin)產(chan)生了(le)影響。特別(bie)是在人員復雜(za)、通信距離(li)較短或(huo)需(xu)(xu)要(yao)較長時(shi)(shi)間使(shi)(shi)用(yong)(yong)時(shi)(shi)。因此，更需(xu)(xu)要(yao)有(you)一(yi)(yi)個可靠的(de)(de)(de)無線(xian)對(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)提供(gong)與(yu)有(you)線(xian)對(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)一(yi)(yi)樣的(de)(de)(de)語音(yin)信息(xi)與(yu)控(kong)制。無線(xian)對(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)具有(you)很高的(de)(de)(de)靈活性，它能夠滿足現場中(zhong)所有(you)環(huan)(huan)境(jing)使(shi)(shi)用(yong)(yong)需(xu)(xu)求并能隨(sui)時(shi)(shi)切換（如在野(ye)外(wai)、戶(hu)外(wai)電話等),用(yong)(yong)戶(hu)可以在任何地點(dian)使(shi)(shi)用(yong)(yong)、隨(sui)時(shi)(shi)、隨(sui)地進行通訊(xun)。使(shi)(shi)用(yong)(yong)方便、節(jie)省(sheng)成本(ben)、節(jie)約費用(yong)(yong)。下面我們來了(le)解(jie)一(yi)(yi)下無線(xian)對(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)它主要(yao)是什(shen)么優點(dian)？

1.性(xing)能穩定，可(ke)靠性(xing)高

在(zai)相同無(wu)線(xian)傳(chuan)輸(shu)距離下，無(wu)線(xian)傳(chuan)輸(shu)信(xin)號(hao)(hao)更穩(wen)定由于使用了功率(lv)放(fang)大(da)器來(lai)對(dui)無(wu)線(xian)信(xin)號(hao)(hao)進行壓縮(suo)和(he)(he)放(fang)大(da)，使無(wu)線(xian)信(xin)號(hao)(hao)更加穩(wen)定可靠。無(wu)線(xian)信(xin)號(hao)(hao)在(zai)弱電磁環(huan)境下也(ye)能(neng)(neng)保持(chi)較(jiao)(jiao)好(hao)(hao)的(de)(de)性(xing)(xing)(xing)能(neng)(neng)。無(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)具有發射功率(lv)小、抗千擾(rao)能(neng)(neng)力強(與有線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)比較(jiao)(jiao))和(he)(he)抗電磁干擾(rao)能(neng)(neng)力強(與有線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)比較(jiao)(jiao))的(de)(de)特點。無(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)發射信(xin)號(hao)(hao)在(zai)發射前和(he)(he)發射后均能(neng)(neng)保持(chi)良(liang)好(hao)(hao)的(de)(de)性(xing)(xing)(xing)能(neng)(neng)，使用過程中，發射信(xin)號(hao)(hao)與接收(shou)信(xin)號(hao)(hao)完全不受任何千擾(rao)，可保持(chi)很好(hao)(hao)的(de)(de)穩(wen)定性(xing)(xing)(xing)，具有良(liang)好(hao)(hao)的(de)(de)抗千擾(rao)性(xing)(xing)(xing)和(he)(he)抗低頻(pin)干擾(rao)能(neng)(neng)力，即(ji)使在(zai)惡劣的(de)(de)環(huan)境下也(ye)能(neng)(neng)保持(chi)較(jiao)(jiao)好(hao)(hao)的(de)(de)性(xing)(xing)(xing)能(neng)(neng)。因此(ci)無(wu)線(xian)系(xi)(xi)統(tong)(tong)有較(jiao)(jiao)高(gao)的(de)(de)可靠性(xing)(xing)(xing)。

2.功(gong)耗小、不受天氣、濕度(du)的影響

無線(xian)對(dui)講系(xi)統(tong)在(zai)不同(tong)(tong)(tong)的(de)環(huan)境(jing)中，無線(xian)通信(xin)設(she)(she)(she)備和有(you)線(xian)通信(xin)設(she)(she)(she)備一樣都要(yao)進行電(dian)能(neng)的(de)消耗(hao)。當(dang)環(huan)境(jing)溫度在(zai)-40°C以(yi)下時，無線(xian)通信(xin)設(she)(she)(she)備需要(yao)每(mei)(mei)天(tian)工(gong)作8小時左右(you)(you);當(dang)環(huan)境(jing)溫度為-20°C時，每(mei)(mei)天(tian)工(gong)作8小時左右(you)(you);當(dang)環(huan)境(jing)溫度為-30°C時，每(mei)(mei)天(tian)工(gong)作4小時左右(you)(you)。目前市場上常見的(de)無線(xian)對(dui)講系(xi)統(tong)有(you)兩種(zhong)電(dian)源輸(shu)入方(fang)式(shi)，一種(zhong)是(shi)電(dian)源輸(shu)入，另一種(zhong)是(shi)電(dian)源輸(shu)出。從這兩種(zhong)方(fang)式(shi)對(dui)系(xi)統(tong)的(de)功(gong)(gong)耗(hao)來看，電(dian)源輸(shu)入方(fang)式(shi)的(de)功(gong)(gong)耗(hao)更大一些，但是(shi)功(gong)(gong)耗(hao)很小。并且設(she)(she)(she)備的(de)工(gong)作環(huan)境(jing)不同(tong)(tong)(tong)，對(dui)電(dian)池的(de)需求量(liang)也不同(tong)(tong)(tong)，所(suo)以(yi)功(gong)(gong)耗(hao)也不同(tong)(tong)(tong)。

3信號不受干擾

在(zai)一些(xie)有(you)干(gan)(gan)(gan)(gan)擾(rao)(rao)的(de)(de)地方(fang)，例如(ru)野外(wai)(wai)、機場、工(gong)廠等，一般采(cai)(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)方(fang)式(shi)。分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)方(fang)式(shi)的(de)(de)抗(kang)(kang)干(gan)(gan)(gan)(gan)擾(rao)(rao)能(neng)力不強(qiang)，其抗(kang)(kang)干(gan)(gan)(gan)(gan)擾(rao)(rao)能(neng)力主要(yao)(yao)取決于射頻(pin)(pin)功(gong)(gong)率的(de)(de)大(da)小。分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)的(de)(de)功(gong)(gong)率一般是(shi)50dB在(zai)50dB左右時(shi)，其抗(kang)(kang)干(gan)(gan)(gan)(gan)擾(rao)(rao)能(neng)力強(qiang)。但(dan)由(you)于分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)的(de)(de)干(gan)(gan)(gan)(gan)擾(rao)(rao)與(yu)噪(zao)聲(主要(yao)(yao)是(shi)周邊噪(zao)聲)具有(you)很(hen)強(qiang)的(de)(de)互(hu)通性，當分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)發(fa)(fa)射的(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)超(chao)過50dB時(shi)，其抗(kang)(kang)千擾(rao)(rao)能(neng)力就會(hui)減弱。另(ling)外(wai)(wai)，在(zai)一些(xie)有(you)噪(zao)音的(de)(de)環境中(zhong)使用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)，會(hui)使分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)信(xin)(xin)(xin)(xin)(xin)號(hao)無(wu)法到達發(fa)(fa)射端(duan)(duan)的(de)(de)接(jie)收機或(huo)者造成(cheng)(cheng)發(fa)(fa)射端(duan)(duan)信(xin)(xin)(xin)(xin)(xin)號(hao)與(yu)接(jie)收端(duan)(duan)信(xin)(xin)(xin)(xin)(xin)號(hao)的(de)(de)糟合而造成(cheng)(cheng)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)或(huo)干(gan)(gan)(gan)(gan)擾(rao)(rao)(例如(ru)在(zai)使用(yong)(yong)室外(wai)(wai)電話(hua)時(shi)) 。而采(cai)(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)的(de)(de)無(wu)線(xian)(xian)對(dui)講(jiang)系統(tong)由(you)于發(fa)(fa)射功(gong)(gong)率小，分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)后的(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)強(qiang)度(du)比有(you)線(xian)(xian)對(dui)講(jiang)系統(tong)高很(hen)多(在(zai)實際使用(yong)(yong)中(zhong)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)設備一般可(ke)以(yi)將系統(tong)信(xin)(xin)(xin)(xin)(xin)號(hao)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)到50dB以(yi)上),信(xin)(xin)(xin)(xin)(xin)號(hao)不受干(gan)(gan)(gan)(gan)擾(rao)(rao)。如(ru)果采(cai)(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)技(ji)術(shu)，需要(yao)(yao)在(zai)較大(da)的(de)(de)回波功(gong)(gong)率下才能(neng)實現信(xin)(xin)(xin)(xin)(xin)號(hao)的(de)(de)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)工(gong)作(如(ru)分(fen)(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)器發(fa)(fa)射信(xin)(xin)(xin)(xin)(xin)號(hao)與(yu)接(jie)收信(xin)(xin)(xin)(xin)(xin)號(hao)重疊(die)時(shi)產(chan)生(sheng)的(de)(de)千擾(rao)(rao))和發(fa)(fa)送信(xin)(xin)(xin)(xin)(xin)號(hao)強(qiang)度(du)降(jiang)(jiang)低(di)(di)(同頻(pin)(pin)帶內的(de)(de)兩(liang)只天線(xian)(xian)對(dui)同一信(xin)(xin)(xin)(xin)(xin)道傳輸的(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)強(qiang)度(du)基本一致);如(ru)果采(cai)(cai)用(yong)(yong)混響技(ji)術(shu)，則(ze)可(ke)以(yi)實現對(dui)無(wu)線(xian)(xian)信(xin)(xin)(xin)(xin)(xin)號(hao)干(gan)(gan)(gan)(gan)擾(rao)(rao)的(de)(de)抑制或(huo)降(jiang)(jiang)低(di)(di)。