由(you)于(yu)(yu)在(zai)戶(hu)外(wai)、室內等(deng)(deng)區域，無線(xian)(xian)(xian)對(dui)講系(xi)(xi)統(tong)(tong)(tong)的信(xin)(xin)號強(qiang)度較(jiao)弱(ruo)，而(er)且(qie)采用(yong)頻率調(diao)制技術（如 MHZ、 NMR、 BSI等(deng)(deng)）產生的信(xin)(xin)號傳(chuan)輸(shu)時延(yan)大，傳(chuan)輸(shu)距離遠。因此有線(xian)(xian)(xian)對(dui)講系(xi)(xi)統(tong)(tong)(tong)不適合在(zai)戶(hu)外(wai)環(huan)境(jing)使(shi)(shi)(shi)用(yong)，特別是(shi)在(zai)冬天(tian)及低風速(su)季(ji)節使(shi)(shi)(shi)用(yong)。雖然無線(xian)(xian)(xian)對(dui)講系(xi)(xi)統(tong)(tong)(tong)也有著不錯的效果(guo)。但(dan)由(you)于(yu)(yu)系(xi)(xi)統(tong)(tong)(tong)工作時會有一(yi)(yi)定的干擾，使(shi)(shi)(shi)對(dui)講效果(guo)下降，另外(wai)在(zai)信(xin)(xin)號較(jiao)弱(ruo)時對(dui)用(yong)戶(hu)語(yu)音產生了影響。特別是(shi)在(zai)人員復雜、通(tong)信(xin)(xin)距離較(jiao)短或需要(yao)較(jiao)長時間使(shi)(shi)(shi)用(yong)時。因此，更需要(yao)有一(yi)(yi)個可(ke)靠的無線(xian)(xian)(xian)對(dui)講系(xi)(xi)統(tong)(tong)(tong)提供與有線(xian)(xian)(xian)對(dui)講系(xi)(xi)統(tong)(tong)(tong)一(yi)(yi)樣的語(yu)音信(xin)(xin)息與控制。無線(xian)(xian)(xian)對(dui)講系(xi)(xi)統(tong)(tong)(tong)具(ju)有很(hen)高的靈活性(xing)，它能夠滿足現場中所有環(huan)境(jing)使(shi)(shi)(shi)用(yong)需求(qiu)并能隨(sui)(sui)時切換（如在(zai)野外(wai)、戶(hu)外(wai)電(dian)話等(deng)(deng)),用(yong)戶(hu)可(ke)以在(zai)任何地點(dian)(dian)使(shi)(shi)(shi)用(yong)、隨(sui)(sui)時、隨(sui)(sui)地進行通(tong)訊(xun)。使(shi)(shi)(shi)用(yong)方便(bian)、節省成本、節約費用(yong)。下面(mian)我們來了解一(yi)(yi)下無線(xian)(xian)(xian)對(dui)講系(xi)(xi)統(tong)(tong)(tong)它主要(yao)是(shi)什么優點(dian)(dian)？

1.性能(neng)穩(wen)定，可靠性高

在(zai)(zai)相同(tong)無(wu)(wu)線(xian)(xian)(xian)傳(chuan)輸(shu)距離(li)下(xia)，無(wu)(wu)線(xian)(xian)(xian)傳(chuan)輸(shu)信(xin)(xin)號更穩定由于使用了(le)功率(lv)放(fang)大(da)器來對(dui)(dui)無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號進(jin)行壓縮和放(fang)大(da)，使無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號更加穩定可(ke)靠(kao)。無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號在(zai)(zai)弱電磁(ci)環境下(xia)也能(neng)保(bao)(bao)持較(jiao)(jiao)好(hao)(hao)的(de)(de)(de)性(xing)(xing)(xing)能(neng)。無(wu)(wu)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)(xi)統具有(you)發(fa)(fa)(fa)射功率(lv)小、抗(kang)千擾(rao)能(neng)力(li)(li)強(與(yu)有(you)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)(xi)統比較(jiao)(jiao))和抗(kang)電磁(ci)干擾(rao)能(neng)力(li)(li)強(與(yu)有(you)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)(xi)統比較(jiao)(jiao))的(de)(de)(de)特點。無(wu)(wu)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)(xi)統發(fa)(fa)(fa)射信(xin)(xin)號在(zai)(zai)發(fa)(fa)(fa)射前和發(fa)(fa)(fa)射后均能(neng)保(bao)(bao)持良(liang)好(hao)(hao)的(de)(de)(de)性(xing)(xing)(xing)能(neng)，使用過程中，發(fa)(fa)(fa)射信(xin)(xin)號與(yu)接收信(xin)(xin)號完全不(bu)受任何(he)千擾(rao)，可(ke)保(bao)(bao)持很好(hao)(hao)的(de)(de)(de)穩定性(xing)(xing)(xing)，具有(you)良(liang)好(hao)(hao)的(de)(de)(de)抗(kang)千擾(rao)性(xing)(xing)(xing)和抗(kang)低頻干擾(rao)能(neng)力(li)(li)，即使在(zai)(zai)惡劣(lie)的(de)(de)(de)環境下(xia)也能(neng)保(bao)(bao)持較(jiao)(jiao)好(hao)(hao)的(de)(de)(de)性(xing)(xing)(xing)能(neng)。因此(ci)無(wu)(wu)線(xian)(xian)(xian)系(xi)(xi)統有(you)較(jiao)(jiao)高的(de)(de)(de)可(ke)靠(kao)性(xing)(xing)(xing)。

2.功耗(hao)小、不受(shou)天氣、濕度的影響(xiang)

無(wu)(wu)線對(dui)講系(xi)(xi)統在不(bu)(bu)同的環(huan)(huan)境中，無(wu)(wu)線通信設備(bei)和有線通信設備(bei)一樣都要進行電(dian)能的消耗(hao)。當(dang)環(huan)(huan)境溫(wen)度在-40°C以下時，無(wu)(wu)線通信設備(bei)需要每(mei)(mei)天(tian)工(gong)(gong)作8小時左右;當(dang)環(huan)(huan)境溫(wen)度為-20°C時，每(mei)(mei)天(tian)工(gong)(gong)作8小時左右;當(dang)環(huan)(huan)境溫(wen)度為-30°C時，每(mei)(mei)天(tian)工(gong)(gong)作4小時左右。目前市場上常見的無(wu)(wu)線對(dui)講系(xi)(xi)統有兩(liang)種電(dian)源(yuan)輸入方式，一種是電(dian)源(yuan)輸入，另一種是電(dian)源(yuan)輸出(chu)。從(cong)這兩(liang)種方式對(dui)系(xi)(xi)統的功(gong)(gong)耗(hao)來看(kan)，電(dian)源(yuan)輸入方式的功(gong)(gong)耗(hao)更大一些，但是功(gong)(gong)耗(hao)很小。并(bing)且設備(bei)的工(gong)(gong)作環(huan)(huan)境不(bu)(bu)同，對(dui)電(dian)池的需求量(liang)也不(bu)(bu)同，所以功(gong)(gong)耗(hao)也不(bu)(bu)同。

3信號不受干擾

在(zai)(zai)一些有(you)(you)干(gan)(gan)(gan)(gan)擾的(de)(de)地(di)方，例(li)如(ru)野(ye)外、機場(chang)、工(gong)廠等，一般(ban)采(cai)用(yong)分頻(pin)(pin)方式。分頻(pin)(pin)方式的(de)(de)抗干(gan)(gan)(gan)(gan)擾能(neng)(neng)力(li)不強(qiang)(qiang)，其(qi)抗干(gan)(gan)(gan)(gan)擾能(neng)(neng)力(li)主要(yao)取決(jue)于射(she)頻(pin)(pin)功率(lv)(lv)的(de)(de)大小(xiao)。分頻(pin)(pin)技(ji)(ji)術(shu)的(de)(de)功率(lv)(lv)一般(ban)是50dB在(zai)(zai)50dB左(zuo)右時(shi)，其(qi)抗干(gan)(gan)(gan)(gan)擾能(neng)(neng)力(li)強(qiang)(qiang)。但由于分頻(pin)(pin)的(de)(de)干(gan)(gan)(gan)(gan)擾與噪(zao)聲(sheng)(主要(yao)是周邊噪(zao)聲(sheng))具有(you)(you)很(hen)強(qiang)(qiang)的(de)(de)互通性，當分頻(pin)(pin)發(fa)射(she)的(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)超(chao)過50dB時(shi)，其(qi)抗千(qian)(qian)擾能(neng)(neng)力(li)就會減(jian)弱(ruo)。另外，在(zai)(zai)一些有(you)(you)噪(zao)音(yin)的(de)(de)環(huan)境中(zhong)使(shi)用(yong)分頻(pin)(pin)技(ji)(ji)術(shu)，會使(shi)分頻(pin)(pin)信(xin)(xin)號(hao)(hao)(hao)(hao)無法到達發(fa)射(she)端(duan)(duan)的(de)(de)接(jie)收機或(huo)者造成發(fa)射(she)端(duan)(duan)信(xin)(xin)號(hao)(hao)(hao)(hao)與接(jie)收端(duan)(duan)信(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)糟合(he)而造成分頻(pin)(pin)或(huo)干(gan)(gan)(gan)(gan)擾(例(li)如(ru)在(zai)(zai)使(shi)用(yong)室(shi)外電(dian)話(hua)時(shi)) 。而采(cai)用(yong)分頻(pin)(pin)技(ji)(ji)術(shu)的(de)(de)無線(xian)對(dui)(dui)講系統(tong)由于發(fa)射(she)功率(lv)(lv)小(xiao)，分頻(pin)(pin)后的(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)度(du)比有(you)(you)線(xian)對(dui)(dui)講系統(tong)高很(hen)多(在(zai)(zai)實(shi)際使(shi)用(yong)中(zhong)分頻(pin)(pin)設(she)備一般(ban)可(ke)以(yi)將(jiang)系統(tong)信(xin)(xin)號(hao)(hao)(hao)(hao)分頻(pin)(pin)到50dB以(yi)上),信(xin)(xin)號(hao)(hao)(hao)(hao)不受干(gan)(gan)(gan)(gan)擾。如(ru)果采(cai)用(yong)分頻(pin)(pin)技(ji)(ji)術(shu)，需要(yao)在(zai)(zai)較(jiao)大的(de)(de)回波功率(lv)(lv)下才(cai)能(neng)(neng)實(shi)現(xian)信(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)分頻(pin)(pin)工(gong)作(如(ru)分頻(pin)(pin)器(qi)發(fa)射(she)信(xin)(xin)號(hao)(hao)(hao)(hao)與接(jie)收信(xin)(xin)號(hao)(hao)(hao)(hao)重(zhong)疊(die)時(shi)產(chan)生的(de)(de)千(qian)(qian)擾)和發(fa)送信(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)度(du)降(jiang)低(di)(同頻(pin)(pin)帶內的(de)(de)兩只天線(xian)對(dui)(dui)同一信(xin)(xin)道傳輸的(de)(de)信(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)(qiang)度(du)基本一致);如(ru)果采(cai)用(yong)混響技(ji)(ji)術(shu)，則(ze)可(ke)以(yi)實(shi)現(xian)對(dui)(dui)無線(xian)信(xin)(xin)號(hao)(hao)(hao)(hao)干(gan)(gan)(gan)(gan)擾的(de)(de)抑(yi)制或(huo)降(jiang)低(di)。