由(you)于在(zai)戶(hu)外(wai)、室內等(deng)區域，無線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)的(de)信(xin)號(hao)強度較(jiao)弱，而(er)且采用(yong)頻率(lv)調制技術（如 MHZ、 NMR、 BSI等(deng)）產(chan)生的(de)信(xin)號(hao)傳(chuan)輸時(shi)延大，傳(chuan)輸距(ju)離(li)遠。因此有(you)線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)不適合(he)在(zai)戶(hu)外(wai)環境使(shi)(shi)用(yong)，特別(bie)是(shi)在(zai)冬(dong)天及低風速季節使(shi)(shi)用(yong)。雖然無線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)也有(you)著不錯的(de)效(xiao)(xiao)果。但由(you)于系(xi)(xi)統(tong)(tong)(tong)工作時(shi)會有(you)一定(ding)的(de)干擾，使(shi)(shi)對(dui)講(jiang)(jiang)效(xiao)(xiao)果下降，另外(wai)在(zai)信(xin)號(hao)較(jiao)弱時(shi)對(dui)用(yong)戶(hu)語音產(chan)生了影響。特別(bie)是(shi)在(zai)人員復雜、通(tong)(tong)信(xin)距(ju)離(li)較(jiao)短或(huo)需要較(jiao)長時(shi)間使(shi)(shi)用(yong)時(shi)。因此，更需要有(you)一個可(ke)靠的(de)無線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)提供與有(you)線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)一樣的(de)語音信(xin)息與控制。無線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)具有(you)很高的(de)靈活性，它能夠滿足現場(chang)中所有(you)環境使(shi)(shi)用(yong)需求并(bing)能隨(sui)時(shi)切換(huan)（如在(zai)野外(wai)、戶(hu)外(wai)電話等(deng)),用(yong)戶(hu)可(ke)以(yi)在(zai)任(ren)何地點使(shi)(shi)用(yong)、隨(sui)時(shi)、隨(sui)地進(jin)行(xing)通(tong)(tong)訊。使(shi)(shi)用(yong)方便、節省成(cheng)本、節約費用(yong)。下面我們來了解一下無線(xian)(xian)對(dui)講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)它主(zhu)要是(shi)什么優點？

1.性(xing)(xing)能穩定，可靠性(xing)(xing)高(gao)

在(zai)相同無(wu)線傳輸距離下(xia)，無(wu)線傳輸信(xin)(xin)號(hao)(hao)更穩定由于(yu)使(shi)(shi)用了功率(lv)放(fang)大器來對無(wu)線信(xin)(xin)號(hao)(hao)進行(xing)壓縮和(he)放(fang)大，使(shi)(shi)無(wu)線信(xin)(xin)號(hao)(hao)更加穩定可靠。無(wu)線信(xin)(xin)號(hao)(hao)在(zai)弱(ruo)電(dian)磁(ci)環(huan)境下(xia)也能(neng)(neng)(neng)保持(chi)較好的(de)(de)性(xing)能(neng)(neng)(neng)。無(wu)線對講(jiang)系(xi)統(tong)具(ju)有發(fa)射(she)功率(lv)小(xiao)、抗(kang)千擾能(neng)(neng)(neng)力(li)(li)強(qiang)(與(yu)有線對講(jiang)系(xi)統(tong)比(bi)較)和(he)抗(kang)電(dian)磁(ci)干擾能(neng)(neng)(neng)力(li)(li)強(qiang)(與(yu)有線對講(jiang)系(xi)統(tong)比(bi)較)的(de)(de)特點(dian)。無(wu)線對講(jiang)系(xi)統(tong)發(fa)射(she)信(xin)(xin)號(hao)(hao)在(zai)發(fa)射(she)前和(he)發(fa)射(she)后(hou)均能(neng)(neng)(neng)保持(chi)良(liang)好的(de)(de)性(xing)能(neng)(neng)(neng)，使(shi)(shi)用過程中，發(fa)射(she)信(xin)(xin)號(hao)(hao)與(yu)接收(shou)信(xin)(xin)號(hao)(hao)完(wan)全不受任何千擾，可保持(chi)很好的(de)(de)穩定性(xing)，具(ju)有良(liang)好的(de)(de)抗(kang)千擾性(xing)和(he)抗(kang)低頻(pin)干擾能(neng)(neng)(neng)力(li)(li)，即使(shi)(shi)在(zai)惡劣(lie)的(de)(de)環(huan)境下(xia)也能(neng)(neng)(neng)保持(chi)較好的(de)(de)性(xing)能(neng)(neng)(neng)。因(yin)此無(wu)線系(xi)統(tong)有較高(gao)的(de)(de)可靠性(xing)。

2.功耗(hao)小、不(bu)受天氣、濕度的影(ying)響

無(wu)線對(dui)講系(xi)統(tong)在不(bu)同(tong)的環(huan)境中，無(wu)線通(tong)信(xin)設備和(he)有線通(tong)信(xin)設備一樣都(dou)要(yao)進(jin)行電(dian)能(neng)的消耗(hao)(hao)。當(dang)環(huan)境溫度(du)在-40°C以(yi)下時(shi)(shi)(shi)，無(wu)線通(tong)信(xin)設備需要(yao)每天工(gong)作8小(xiao)(xiao)時(shi)(shi)(shi)左右;當(dang)環(huan)境溫度(du)為(wei)-20°C時(shi)(shi)(shi)，每天工(gong)作8小(xiao)(xiao)時(shi)(shi)(shi)左右;當(dang)環(huan)境溫度(du)為(wei)-30°C時(shi)(shi)(shi)，每天工(gong)作4小(xiao)(xiao)時(shi)(shi)(shi)左右。目前市場(chang)上(shang)常見(jian)的無(wu)線對(dui)講系(xi)統(tong)有兩種(zhong)(zhong)電(dian)源(yuan)輸(shu)入方式，一種(zhong)(zhong)是(shi)電(dian)源(yuan)輸(shu)入，另一種(zhong)(zhong)是(shi)電(dian)源(yuan)輸(shu)出。從這兩種(zhong)(zhong)方式對(dui)系(xi)統(tong)的功耗(hao)(hao)來(lai)看，電(dian)源(yuan)輸(shu)入方式的功耗(hao)(hao)更大一些，但是(shi)功耗(hao)(hao)很小(xiao)(xiao)。并且設備的工(gong)作環(huan)境不(bu)同(tong)，對(dui)電(dian)池的需求量也(ye)不(bu)同(tong)，所以(yi)功耗(hao)(hao)也(ye)不(bu)同(tong)。

3信號不受干擾

在(zai)(zai)(zai)一(yi)些有(you)干擾(rao)(rao)(rao)(rao)的(de)(de)(de)(de)地方(fang)，例如(ru)(ru)野外(wai)(wai)、機場、工廠(chang)等，一(yi)般采用分(fen)(fen)(fen)(fen)(fen)頻方(fang)式。分(fen)(fen)(fen)(fen)(fen)頻方(fang)式的(de)(de)(de)(de)抗干擾(rao)(rao)(rao)(rao)能(neng)力不強，其(qi)(qi)抗干擾(rao)(rao)(rao)(rao)能(neng)力主要取決于射頻功(gong)(gong)率(lv)的(de)(de)(de)(de)大(da)小。分(fen)(fen)(fen)(fen)(fen)頻技(ji)(ji)(ji)術的(de)(de)(de)(de)功(gong)(gong)率(lv)一(yi)般是(shi)50dB在(zai)(zai)(zai)50dB左(zuo)右(you)時，其(qi)(qi)抗干擾(rao)(rao)(rao)(rao)能(neng)力強。但由(you)于分(fen)(fen)(fen)(fen)(fen)頻的(de)(de)(de)(de)干擾(rao)(rao)(rao)(rao)與(yu)噪(zao)(zao)聲(sheng)(主要是(shi)周邊(bian)噪(zao)(zao)聲(sheng))具有(you)很強的(de)(de)(de)(de)互通性，當(dang)分(fen)(fen)(fen)(fen)(fen)頻發(fa)(fa)射的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)超過50dB時，其(qi)(qi)抗千(qian)擾(rao)(rao)(rao)(rao)能(neng)力就(jiu)會減(jian)弱。另外(wai)(wai)，在(zai)(zai)(zai)一(yi)些有(you)噪(zao)(zao)音的(de)(de)(de)(de)環境中使用分(fen)(fen)(fen)(fen)(fen)頻技(ji)(ji)(ji)術，會使分(fen)(fen)(fen)(fen)(fen)頻信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)無法到達發(fa)(fa)射端(duan)(duan)的(de)(de)(de)(de)接(jie)收(shou)機或者造(zao)成發(fa)(fa)射端(duan)(duan)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)與(yu)接(jie)收(shou)端(duan)(duan)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)(de)糟合而(er)造(zao)成分(fen)(fen)(fen)(fen)(fen)頻或干擾(rao)(rao)(rao)(rao)(例如(ru)(ru)在(zai)(zai)(zai)使用室(shi)外(wai)(wai)電話(hua)時) 。而(er)采用分(fen)(fen)(fen)(fen)(fen)頻技(ji)(ji)(ji)術的(de)(de)(de)(de)無線對(dui)講(jiang)系(xi)(xi)統(tong)由(you)于發(fa)(fa)射功(gong)(gong)率(lv)小，分(fen)(fen)(fen)(fen)(fen)頻后的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)強度(du)比有(you)線對(dui)講(jiang)系(xi)(xi)統(tong)高很多(duo)(在(zai)(zai)(zai)實(shi)(shi)際使用中分(fen)(fen)(fen)(fen)(fen)頻設備一(yi)般可以將系(xi)(xi)統(tong)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)分(fen)(fen)(fen)(fen)(fen)頻到50dB以上(shang)),信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)不受干擾(rao)(rao)(rao)(rao)。如(ru)(ru)果(guo)采用分(fen)(fen)(fen)(fen)(fen)頻技(ji)(ji)(ji)術，需(xu)要在(zai)(zai)(zai)較大(da)的(de)(de)(de)(de)回波功(gong)(gong)率(lv)下才能(neng)實(shi)(shi)現信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)(de)分(fen)(fen)(fen)(fen)(fen)頻工作(如(ru)(ru)分(fen)(fen)(fen)(fen)(fen)頻器發(fa)(fa)射信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)與(yu)接(jie)收(shou)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)重疊時產生的(de)(de)(de)(de)千(qian)擾(rao)(rao)(rao)(rao))和發(fa)(fa)送信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)強度(du)降低(同頻帶內的(de)(de)(de)(de)兩只天線對(dui)同一(yi)信(xin)(xin)(xin)(xin)(xin)道傳輸(shu)的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)強度(du)基本一(yi)致);如(ru)(ru)果(guo)采用混響(xiang)技(ji)(ji)(ji)術，則可以實(shi)(shi)現對(dui)無線信(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)干擾(rao)(rao)(rao)(rao)的(de)(de)(de)(de)抑制或降低。