由于(yu)在(zai)戶外、室(shi)內等區域，無線對講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)的(de)(de)(de)信(xin)號(hao)強度較(jiao)(jiao)弱，而(er)且(qie)采用(yong)頻率調制(zhi)技術（如(ru) MHZ、 NMR、 BSI等）產生的(de)(de)(de)信(xin)號(hao)傳(chuan)輸(shu)時(shi)(shi)延大，傳(chuan)輸(shu)距(ju)(ju)離遠。因(yin)此有(you)(you)線對講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)不適(shi)合在(zai)戶外環境使(shi)用(yong)，特(te)別是在(zai)冬天及低風速季節使(shi)用(yong)。雖然無線對講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)也有(you)(you)著不錯的(de)(de)(de)效果。但由于(yu)系(xi)(xi)統(tong)(tong)(tong)工(gong)作時(shi)(shi)會有(you)(you)一定(ding)的(de)(de)(de)干(gan)擾，使(shi)對講(jiang)(jiang)效果下(xia)降，另外在(zai)信(xin)號(hao)較(jiao)(jiao)弱時(shi)(shi)對用(yong)戶語音(yin)(yin)產生了影(ying)響。特(te)別是在(zai)人員復(fu)雜、通(tong)信(xin)距(ju)(ju)離較(jiao)(jiao)短或(huo)需(xu)要(yao)較(jiao)(jiao)長時(shi)(shi)間使(shi)用(yong)時(shi)(shi)。因(yin)此，更需(xu)要(yao)有(you)(you)一個可靠(kao)的(de)(de)(de)無線對講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)提供與有(you)(you)線對講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)一樣的(de)(de)(de)語音(yin)(yin)信(xin)息與控(kong)制(zhi)。無線對講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)具有(you)(you)很高的(de)(de)(de)靈活性，它能夠滿足現場中所有(you)(you)環境使(shi)用(yong)需(xu)求(qiu)并能隨(sui)(sui)時(shi)(shi)切換(huan)（如(ru)在(zai)野外、戶外電話等),用(yong)戶可以在(zai)任何(he)地點使(shi)用(yong)、隨(sui)(sui)時(shi)(shi)、隨(sui)(sui)地進行通(tong)訊(xun)。使(shi)用(yong)方便(bian)、節省成本(ben)、節約費用(yong)。下(xia)面我們來了解一下(xia)無線對講(jiang)(jiang)系(xi)(xi)統(tong)(tong)(tong)它主要(yao)是什(shen)么優點？

1.性能穩(wen)定，可靠性高

在相(xiang)同(tong)無(wu)(wu)線(xian)(xian)(xian)傳輸距離下(xia)，無(wu)(wu)線(xian)(xian)(xian)傳輸信號(hao)更穩(wen)定由于使用了功率(lv)放(fang)大器(qi)來對無(wu)(wu)線(xian)(xian)(xian)信號(hao)進行壓縮和(he)放(fang)大，使無(wu)(wu)線(xian)(xian)(xian)信號(hao)更加穩(wen)定可(ke)靠(kao)。無(wu)(wu)線(xian)(xian)(xian)信號(hao)在弱電磁環境下(xia)也能(neng)(neng)保持(chi)較(jiao)好(hao)(hao)的(de)性(xing)(xing)(xing)能(neng)(neng)。無(wu)(wu)線(xian)(xian)(xian)對講系統具有(you)(you)發射(she)功率(lv)小、抗(kang)千(qian)(qian)擾(rao)(rao)(rao)能(neng)(neng)力強(與有(you)(you)線(xian)(xian)(xian)對講系統比較(jiao))和(he)抗(kang)電磁干擾(rao)(rao)(rao)能(neng)(neng)力強(與有(you)(you)線(xian)(xian)(xian)對講系統比較(jiao))的(de)特(te)點(dian)。無(wu)(wu)線(xian)(xian)(xian)對講系統發射(she)信號(hao)在發射(she)前(qian)和(he)發射(she)后均能(neng)(neng)保持(chi)良(liang)好(hao)(hao)的(de)性(xing)(xing)(xing)能(neng)(neng)，使用過程中，發射(she)信號(hao)與接收信號(hao)完全不受任何千(qian)(qian)擾(rao)(rao)(rao)，可(ke)保持(chi)很(hen)好(hao)(hao)的(de)穩(wen)定性(xing)(xing)(xing)，具有(you)(you)良(liang)好(hao)(hao)的(de)抗(kang)千(qian)(qian)擾(rao)(rao)(rao)性(xing)(xing)(xing)和(he)抗(kang)低(di)頻干擾(rao)(rao)(rao)能(neng)(neng)力，即使在惡(e)劣的(de)環境下(xia)也能(neng)(neng)保持(chi)較(jiao)好(hao)(hao)的(de)性(xing)(xing)(xing)能(neng)(neng)。因此無(wu)(wu)線(xian)(xian)(xian)系統有(you)(you)較(jiao)高的(de)可(ke)靠(kao)性(xing)(xing)(xing)。

2.功耗小、不受(shou)天(tian)氣、濕度的影響

無(wu)線對講(jiang)系(xi)統在(zai)不(bu)同的(de)(de)(de)環境(jing)中，無(wu)線通信(xin)設(she)備和(he)有(you)(you)線通信(xin)設(she)備一樣(yang)都(dou)要(yao)進行電能的(de)(de)(de)消耗(hao)。當環境(jing)溫(wen)(wen)度在(zai)-40°C以(yi)下時(shi)，無(wu)線通信(xin)設(she)備需(xu)要(yao)每天(tian)(tian)工(gong)(gong)作8小(xiao)(xiao)時(shi)左(zuo)右(you);當環境(jing)溫(wen)(wen)度為-20°C時(shi)，每天(tian)(tian)工(gong)(gong)作8小(xiao)(xiao)時(shi)左(zuo)右(you);當環境(jing)溫(wen)(wen)度為-30°C時(shi)，每天(tian)(tian)工(gong)(gong)作4小(xiao)(xiao)時(shi)左(zuo)右(you)。目(mu)前市場(chang)上常見的(de)(de)(de)無(wu)線對講(jiang)系(xi)統有(you)(you)兩種電源(yuan)輸(shu)入(ru)(ru)方式，一種是(shi)電源(yuan)輸(shu)入(ru)(ru)，另一種是(shi)電源(yuan)輸(shu)出。從這兩種方式對系(xi)統的(de)(de)(de)功耗(hao)來看(kan)，電源(yuan)輸(shu)入(ru)(ru)方式的(de)(de)(de)功耗(hao)更大一些(xie)，但是(shi)功耗(hao)很小(xiao)(xiao)。并(bing)且設(she)備的(de)(de)(de)工(gong)(gong)作環境(jing)不(bu)同，對電池(chi)的(de)(de)(de)需(xu)求量也不(bu)同，所以(yi)功耗(hao)也不(bu)同。

3信號不受干擾

在(zai)(zai)(zai)(zai)一(yi)(yi)些有干擾(rao)的(de)(de)(de)(de)(de)地(di)方，例如(ru)野外、機(ji)場、工(gong)(gong)廠等，一(yi)(yi)般(ban)(ban)采(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)方式。分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)方式的(de)(de)(de)(de)(de)抗(kang)干擾(rao)能力(li)不強，其(qi)抗(kang)干擾(rao)能力(li)主(zhu)要取決于(yu)射頻(pin)(pin)(pin)功率的(de)(de)(de)(de)(de)大小(xiao)。分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技術(shu)的(de)(de)(de)(de)(de)功率一(yi)(yi)般(ban)(ban)是(shi)50dB在(zai)(zai)(zai)(zai)50dB左右時，其(qi)抗(kang)干擾(rao)能力(li)強。但(dan)由于(yu)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)的(de)(de)(de)(de)(de)干擾(rao)與(yu)噪(zao)聲(主(zhu)要是(shi)周邊噪(zao)聲)具有很強的(de)(de)(de)(de)(de)互通性(xing)，當分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)發射的(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)超過50dB時，其(qi)抗(kang)千(qian)擾(rao)能力(li)就會減弱(ruo)。另外，在(zai)(zai)(zai)(zai)一(yi)(yi)些有噪(zao)音的(de)(de)(de)(de)(de)環(huan)境(jing)中(zhong)使(shi)用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技術(shu)，會使(shi)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)信(xin)(xin)(xin)(xin)號(hao)(hao)無(wu)法到達發射端(duan)(duan)(duan)的(de)(de)(de)(de)(de)接收(shou)機(ji)或者造成發射端(duan)(duan)(duan)信(xin)(xin)(xin)(xin)號(hao)(hao)與(yu)接收(shou)端(duan)(duan)(duan)信(xin)(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)(de)糟(zao)合而造成分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)或干擾(rao)(例如(ru)在(zai)(zai)(zai)(zai)使(shi)用(yong)(yong)室外電話時) 。而采(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技術(shu)的(de)(de)(de)(de)(de)無(wu)線(xian)對(dui)講系(xi)統由于(yu)發射功率小(xiao)，分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)后的(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)強度比(bi)有線(xian)對(dui)講系(xi)統高很多(在(zai)(zai)(zai)(zai)實(shi)際使(shi)用(yong)(yong)中(zhong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)設備一(yi)(yi)般(ban)(ban)可(ke)以(yi)將系(xi)統信(xin)(xin)(xin)(xin)號(hao)(hao)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)到50dB以(yi)上),信(xin)(xin)(xin)(xin)號(hao)(hao)不受干擾(rao)。如(ru)果采(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)技術(shu)，需要在(zai)(zai)(zai)(zai)較大的(de)(de)(de)(de)(de)回波功率下才能實(shi)現(xian)信(xin)(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)(de)(de)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)工(gong)(gong)作(如(ru)分(fen)(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)器發射信(xin)(xin)(xin)(xin)號(hao)(hao)與(yu)接收(shou)信(xin)(xin)(xin)(xin)號(hao)(hao)重疊時產生(sheng)的(de)(de)(de)(de)(de)千(qian)擾(rao))和發送信(xin)(xin)(xin)(xin)號(hao)(hao)強度降低(同(tong)頻(pin)(pin)(pin)帶內的(de)(de)(de)(de)(de)兩只天線(xian)對(dui)同(tong)一(yi)(yi)信(xin)(xin)(xin)(xin)道傳輸的(de)(de)(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)強度基本一(yi)(yi)致);如(ru)果采(cai)用(yong)(yong)混響技術(shu)，則(ze)可(ke)以(yi)實(shi)現(xian)對(dui)無(wu)線(xian)信(xin)(xin)(xin)(xin)號(hao)(hao)干擾(rao)的(de)(de)(de)(de)(de)抑(yi)制或降低。