由于在(zai)戶外(wai)(wai)、室(shi)內(nei)等區(qu)域，無(wu)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)的(de)(de)信號強度較(jiao)弱，而且采用(yong)(yong)(yong)頻率調制(zhi)技(ji)術（如 MHZ、 NMR、 BSI等）產生的(de)(de)信號傳(chuan)輸時(shi)延大，傳(chuan)輸距離(li)遠。因(yin)此有(you)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)不適合在(zai)戶外(wai)(wai)環境使(shi)用(yong)(yong)(yong)，特(te)別是在(zai)冬天及(ji)低風速季節(jie)使(shi)用(yong)(yong)(yong)。雖然無(wu)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)也(ye)有(you)著不錯(cuo)的(de)(de)效(xiao)果(guo)。但由于系(xi)統(tong)(tong)工作時(shi)會(hui)有(you)一定的(de)(de)干擾，使(shi)對講(jiang)效(xiao)果(guo)下降，另外(wai)(wai)在(zai)信號較(jiao)弱時(shi)對用(yong)(yong)(yong)戶語音產生了影響。特(te)別是在(zai)人員復雜(za)、通信距離(li)較(jiao)短或需(xu)要較(jiao)長(chang)時(shi)間使(shi)用(yong)(yong)(yong)時(shi)。因(yin)此，更需(xu)要有(you)一個可靠(kao)的(de)(de)無(wu)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)提(ti)供與有(you)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)一樣的(de)(de)語音信息(xi)與控制(zhi)。無(wu)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)具有(you)很高的(de)(de)靈活性，它(ta)能(neng)夠滿足現場中所有(you)環境使(shi)用(yong)(yong)(yong)需(xu)求(qiu)并能(neng)隨(sui)(sui)時(shi)切換（如在(zai)野外(wai)(wai)、戶外(wai)(wai)電話等),用(yong)(yong)(yong)戶可以在(zai)任何地點使(shi)用(yong)(yong)(yong)、隨(sui)(sui)時(shi)、隨(sui)(sui)地進(jin)行通訊。使(shi)用(yong)(yong)(yong)方(fang)便、節(jie)省(sheng)成(cheng)本、節(jie)約費(fei)用(yong)(yong)(yong)。下面(mian)我們來了解一下無(wu)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)它(ta)主要是什么優點？

1.性(xing)能穩定，可靠性(xing)高

在(zai)相同無(wu)線(xian)傳輸(shu)距離下，無(wu)線(xian)傳輸(shu)信(xin)號(hao)更穩(wen)定由(you)于使用了功率(lv)(lv)放大(da)器(qi)來對(dui)(dui)無(wu)線(xian)信(xin)號(hao)進行壓縮和放大(da)，使無(wu)線(xian)信(xin)號(hao)更加穩(wen)定可(ke)靠(kao)。無(wu)線(xian)信(xin)號(hao)在(zai)弱電磁環境(jing)下也(ye)能(neng)保(bao)持(chi)較好(hao)的性(xing)(xing)(xing)能(neng)。無(wu)線(xian)對(dui)(dui)講系(xi)(xi)統(tong)具有(you)發(fa)(fa)(fa)射功率(lv)(lv)小、抗(kang)(kang)千(qian)擾(rao)(rao)能(neng)力強(qiang)(與(yu)(yu)有(you)線(xian)對(dui)(dui)講系(xi)(xi)統(tong)比較)和抗(kang)(kang)電磁干擾(rao)(rao)能(neng)力強(qiang)(與(yu)(yu)有(you)線(xian)對(dui)(dui)講系(xi)(xi)統(tong)比較)的特(te)點。無(wu)線(xian)對(dui)(dui)講系(xi)(xi)統(tong)發(fa)(fa)(fa)射信(xin)號(hao)在(zai)發(fa)(fa)(fa)射前和發(fa)(fa)(fa)射后均能(neng)保(bao)持(chi)良(liang)好(hao)的性(xing)(xing)(xing)能(neng)，使用過(guo)程中(zhong)，發(fa)(fa)(fa)射信(xin)號(hao)與(yu)(yu)接收信(xin)號(hao)完(wan)全不受任何(he)千(qian)擾(rao)(rao)，可(ke)保(bao)持(chi)很好(hao)的穩(wen)定性(xing)(xing)(xing)，具有(you)良(liang)好(hao)的抗(kang)(kang)千(qian)擾(rao)(rao)性(xing)(xing)(xing)和抗(kang)(kang)低頻干擾(rao)(rao)能(neng)力，即使在(zai)惡劣的環境(jing)下也(ye)能(neng)保(bao)持(chi)較好(hao)的性(xing)(xing)(xing)能(neng)。因此無(wu)線(xian)系(xi)(xi)統(tong)有(you)較高的可(ke)靠(kao)性(xing)(xing)(xing)。

2.功耗小、不(bu)受天氣、濕度的影響

無線(xian)(xian)對講(jiang)(jiang)系統(tong)在不(bu)(bu)同(tong)的環境(jing)中，無線(xian)(xian)通(tong)(tong)信設(she)備和(he)有(you)線(xian)(xian)通(tong)(tong)信設(she)備一樣都要進行電(dian)能的消(xiao)耗(hao)。當環境(jing)溫(wen)(wen)度在-40°C以(yi)(yi)下(xia)時(shi)(shi)，無線(xian)(xian)通(tong)(tong)信設(she)備需要每(mei)(mei)天工(gong)作(zuo)8小時(shi)(shi)左右;當環境(jing)溫(wen)(wen)度為(wei)-20°C時(shi)(shi)，每(mei)(mei)天工(gong)作(zuo)8小時(shi)(shi)左右;當環境(jing)溫(wen)(wen)度為(wei)-30°C時(shi)(shi)，每(mei)(mei)天工(gong)作(zuo)4小時(shi)(shi)左右。目前市場上常見的無線(xian)(xian)對講(jiang)(jiang)系統(tong)有(you)兩種電(dian)源(yuan)(yuan)輸(shu)(shu)入(ru)方(fang)式(shi)，一種是(shi)電(dian)源(yuan)(yuan)輸(shu)(shu)入(ru)，另(ling)一種是(shi)電(dian)源(yuan)(yuan)輸(shu)(shu)出。從這兩種方(fang)式(shi)對系統(tong)的功(gong)耗(hao)來看，電(dian)源(yuan)(yuan)輸(shu)(shu)入(ru)方(fang)式(shi)的功(gong)耗(hao)更大一些，但是(shi)功(gong)耗(hao)很小。并且(qie)設(she)備的工(gong)作(zuo)環境(jing)不(bu)(bu)同(tong)，對電(dian)池(chi)的需求量也不(bu)(bu)同(tong)，所以(yi)(yi)功(gong)耗(hao)也不(bu)(bu)同(tong)。

3信號不受干擾

在(zai)(zai)一(yi)些有干擾(rao)(rao)的(de)(de)(de)(de)地方，例如(ru)(ru)野(ye)外(wai)、機(ji)場、工(gong)廠等，一(yi)般(ban)采(cai)(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)方式(shi)。分(fen)(fen)(fen)(fen)頻(pin)方式(shi)的(de)(de)(de)(de)抗(kang)(kang)干擾(rao)(rao)能力(li)不強(qiang)，其(qi)抗(kang)(kang)干擾(rao)(rao)能力(li)主要(yao)取(qu)決于(yu)(yu)射(she)頻(pin)功率(lv)的(de)(de)(de)(de)大小。分(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)的(de)(de)(de)(de)功率(lv)一(yi)般(ban)是50dB在(zai)(zai)50dB左(zuo)右時(shi)，其(qi)抗(kang)(kang)干擾(rao)(rao)能力(li)強(qiang)。但由于(yu)(yu)分(fen)(fen)(fen)(fen)頻(pin)的(de)(de)(de)(de)干擾(rao)(rao)與(yu)(yu)(yu)噪(zao)聲(sheng)(主要(yao)是周邊噪(zao)聲(sheng))具有很(hen)強(qiang)的(de)(de)(de)(de)互通性(xing)，當(dang)分(fen)(fen)(fen)(fen)頻(pin)發射(she)的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)超過50dB時(shi)，其(qi)抗(kang)(kang)千(qian)擾(rao)(rao)能力(li)就會減弱。另(ling)外(wai)，在(zai)(zai)一(yi)些有噪(zao)音(yin)的(de)(de)(de)(de)環境中(zhong)使(shi)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)，會使(shi)分(fen)(fen)(fen)(fen)頻(pin)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)無(wu)法到(dao)達發射(she)端的(de)(de)(de)(de)接收機(ji)或者造成發射(she)端信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與(yu)(yu)(yu)接收端信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)(de)糟合(he)而造成分(fen)(fen)(fen)(fen)頻(pin)或干擾(rao)(rao)(例如(ru)(ru)在(zai)(zai)使(shi)用(yong)(yong)室外(wai)電話時(shi)) 。而采(cai)(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)的(de)(de)(de)(de)無(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)由于(yu)(yu)發射(she)功率(lv)小，分(fen)(fen)(fen)(fen)頻(pin)后的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)度(du)比有線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)高很(hen)多(duo)(在(zai)(zai)實際使(shi)用(yong)(yong)中(zhong)分(fen)(fen)(fen)(fen)頻(pin)設備(bei)一(yi)般(ban)可以(yi)將系(xi)(xi)統(tong)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)(fen)(fen)頻(pin)到(dao)50dB以(yi)上(shang)),信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)不受干擾(rao)(rao)。如(ru)(ru)果采(cai)(cai)用(yong)(yong)分(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)，需要(yao)在(zai)(zai)較大的(de)(de)(de)(de)回波功率(lv)下才能實現信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)(de)分(fen)(fen)(fen)(fen)頻(pin)工(gong)作(如(ru)(ru)分(fen)(fen)(fen)(fen)頻(pin)器發射(she)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與(yu)(yu)(yu)接收信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)重(zhong)疊(die)時(shi)產生的(de)(de)(de)(de)千(qian)擾(rao)(rao))和(he)發送信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)度(du)降(jiang)低(同(tong)頻(pin)帶(dai)內(nei)的(de)(de)(de)(de)兩(liang)只天線(xian)對(dui)同(tong)一(yi)信(xin)(xin)(xin)(xin)(xin)(xin)道傳輸的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)度(du)基(ji)本(ben)一(yi)致);如(ru)(ru)果采(cai)(cai)用(yong)(yong)混響技(ji)術(shu)，則可以(yi)實現對(dui)無(wu)線(xian)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)干擾(rao)(rao)的(de)(de)(de)(de)抑制或降(jiang)低。