由于在(zai)戶(hu)外、室內(nei)等區域，無(wu)線(xian)(xian)對講(jiang)系(xi)(xi)(xi)統(tong)的(de)(de)(de)(de)信(xin)號(hao)強度(du)較(jiao)弱(ruo)，而且采(cai)用(yong)頻率調制(zhi)技術（如(ru) MHZ、 NMR、 BSI等）產生的(de)(de)(de)(de)信(xin)號(hao)傳輸(shu)時(shi)(shi)(shi)(shi)延大，傳輸(shu)距離遠。因(yin)此有線(xian)(xian)對講(jiang)系(xi)(xi)(xi)統(tong)不(bu)適(shi)合在(zai)戶(hu)外環境(jing)(jing)使(shi)(shi)(shi)用(yong)，特(te)別(bie)是在(zai)冬天及低風速季節使(shi)(shi)(shi)用(yong)。雖然無(wu)線(xian)(xian)對講(jiang)系(xi)(xi)(xi)統(tong)也(ye)有著(zhu)不(bu)錯的(de)(de)(de)(de)效果。但由于系(xi)(xi)(xi)統(tong)工(gong)作時(shi)(shi)(shi)(shi)會有一定的(de)(de)(de)(de)干擾，使(shi)(shi)(shi)對講(jiang)效果下降，另外在(zai)信(xin)號(hao)較(jiao)弱(ruo)時(shi)(shi)(shi)(shi)對用(yong)戶(hu)語音(yin)產生了(le)影(ying)響。特(te)別(bie)是在(zai)人員復雜(za)、通(tong)信(xin)距離較(jiao)短或需(xu)要(yao)較(jiao)長(chang)時(shi)(shi)(shi)(shi)間使(shi)(shi)(shi)用(yong)時(shi)(shi)(shi)(shi)。因(yin)此，更需(xu)要(yao)有一個可(ke)靠的(de)(de)(de)(de)無(wu)線(xian)(xian)對講(jiang)系(xi)(xi)(xi)統(tong)提供(gong)與有線(xian)(xian)對講(jiang)系(xi)(xi)(xi)統(tong)一樣(yang)的(de)(de)(de)(de)語音(yin)信(xin)息(xi)與控制(zhi)。無(wu)線(xian)(xian)對講(jiang)系(xi)(xi)(xi)統(tong)具有很高的(de)(de)(de)(de)靈(ling)活性，它(ta)能夠滿足現場(chang)中所有環境(jing)(jing)使(shi)(shi)(shi)用(yong)需(xu)求并(bing)能隨(sui)(sui)時(shi)(shi)(shi)(shi)切換(huan)（如(ru)在(zai)野外、戶(hu)外電話等),用(yong)戶(hu)可(ke)以在(zai)任何(he)地點(dian)使(shi)(shi)(shi)用(yong)、隨(sui)(sui)時(shi)(shi)(shi)(shi)、隨(sui)(sui)地進(jin)行通(tong)訊。使(shi)(shi)(shi)用(yong)方便、節省成本(ben)、節約費用(yong)。下面我(wo)們來了(le)解一下無(wu)線(xian)(xian)對講(jiang)系(xi)(xi)(xi)統(tong)它(ta)主要(yao)是什么優點(dian)？

1.性能穩定，可靠性高

在(zai)(zai)相同無(wu)線(xian)(xian)傳(chuan)輸(shu)距離下(xia)，無(wu)線(xian)(xian)傳(chuan)輸(shu)信號(hao)更穩(wen)定由于使(shi)用了功(gong)率放(fang)大(da)器來對無(wu)線(xian)(xian)信號(hao)進行(xing)壓縮和(he)放(fang)大(da)，使(shi)無(wu)線(xian)(xian)信號(hao)更加穩(wen)定可靠。無(wu)線(xian)(xian)信號(hao)在(zai)(zai)弱(ruo)電(dian)磁(ci)環(huan)境(jing)下(xia)也(ye)能(neng)保持(chi)(chi)較好(hao)的(de)性(xing)能(neng)。無(wu)線(xian)(xian)對講系統(tong)(tong)(tong)具有(you)(you)發(fa)射(she)功(gong)率小、抗(kang)千(qian)擾(rao)能(neng)力強(qiang)(與(yu)有(you)(you)線(xian)(xian)對講系統(tong)(tong)(tong)比(bi)較)和(he)抗(kang)電(dian)磁(ci)干擾(rao)能(neng)力強(qiang)(與(yu)有(you)(you)線(xian)(xian)對講系統(tong)(tong)(tong)比(bi)較)的(de)特點。無(wu)線(xian)(xian)對講系統(tong)(tong)(tong)發(fa)射(she)信號(hao)在(zai)(zai)發(fa)射(she)前和(he)發(fa)射(she)后均能(neng)保持(chi)(chi)良好(hao)的(de)性(xing)能(neng)，使(shi)用過程中，發(fa)射(she)信號(hao)與(yu)接收信號(hao)完全不受任何千(qian)擾(rao)，可保持(chi)(chi)很好(hao)的(de)穩(wen)定性(xing)，具有(you)(you)良好(hao)的(de)抗(kang)千(qian)擾(rao)性(xing)和(he)抗(kang)低頻干擾(rao)能(neng)力，即(ji)使(shi)在(zai)(zai)惡劣的(de)環(huan)境(jing)下(xia)也(ye)能(neng)保持(chi)(chi)較好(hao)的(de)性(xing)能(neng)。因此無(wu)線(xian)(xian)系統(tong)(tong)(tong)有(you)(you)較高(gao)的(de)可靠性(xing)。

2.功耗(hao)小、不受天氣、濕度(du)的影響

無線(xian)對講(jiang)系(xi)統在(zai)不(bu)同的(de)(de)環(huan)境中(zhong)，無線(xian)通(tong)信(xin)設備(bei)(bei)和有(you)線(xian)通(tong)信(xin)設備(bei)(bei)一(yi)(yi)樣(yang)都要進行(xing)電(dian)(dian)(dian)能的(de)(de)消耗(hao)。當環(huan)境溫(wen)度(du)(du)在(zai)-40°C以下時(shi)(shi)(shi)(shi)，無線(xian)通(tong)信(xin)設備(bei)(bei)需要每天(tian)工(gong)作8小時(shi)(shi)(shi)(shi)左右;當環(huan)境溫(wen)度(du)(du)為(wei)-20°C時(shi)(shi)(shi)(shi)，每天(tian)工(gong)作8小時(shi)(shi)(shi)(shi)左右;當環(huan)境溫(wen)度(du)(du)為(wei)-30°C時(shi)(shi)(shi)(shi)，每天(tian)工(gong)作4小時(shi)(shi)(shi)(shi)左右。目前市場上常見的(de)(de)無線(xian)對講(jiang)系(xi)統有(you)兩種電(dian)(dian)(dian)源(yuan)(yuan)輸(shu)入(ru)(ru)方式(shi)，一(yi)(yi)種是電(dian)(dian)(dian)源(yuan)(yuan)輸(shu)入(ru)(ru)，另一(yi)(yi)種是電(dian)(dian)(dian)源(yuan)(yuan)輸(shu)出。從這(zhe)兩種方式(shi)對系(xi)統的(de)(de)功(gong)耗(hao)來看，電(dian)(dian)(dian)源(yuan)(yuan)輸(shu)入(ru)(ru)方式(shi)的(de)(de)功(gong)耗(hao)更大一(yi)(yi)些(xie)，但是功(gong)耗(hao)很小。并(bing)且設備(bei)(bei)的(de)(de)工(gong)作環(huan)境不(bu)同，對電(dian)(dian)(dian)池的(de)(de)需求量(liang)也不(bu)同，所以功(gong)耗(hao)也不(bu)同。

3信號不受干擾

在(zai)一些(xie)有干(gan)(gan)擾(rao)(rao)的(de)(de)(de)(de)(de)地方(fang)(fang)，例(li)(li)如(ru)(ru)(ru)野外、機場(chang)、工廠等(deng)，一般(ban)(ban)采用分(fen)(fen)(fen)(fen)(fen)頻(pin)方(fang)(fang)式(shi)。分(fen)(fen)(fen)(fen)(fen)頻(pin)方(fang)(fang)式(shi)的(de)(de)(de)(de)(de)抗干(gan)(gan)擾(rao)(rao)能力(li)(li)不強(qiang)(qiang)，其(qi)抗干(gan)(gan)擾(rao)(rao)能力(li)(li)主(zhu)要(yao)取(qu)決于射(she)(she)頻(pin)功率的(de)(de)(de)(de)(de)大小。分(fen)(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)(shu)的(de)(de)(de)(de)(de)功率一般(ban)(ban)是50dB在(zai)50dB左右時(shi)，其(qi)抗干(gan)(gan)擾(rao)(rao)能力(li)(li)強(qiang)(qiang)。但由于分(fen)(fen)(fen)(fen)(fen)頻(pin)的(de)(de)(de)(de)(de)干(gan)(gan)擾(rao)(rao)與噪聲(主(zhu)要(yao)是周邊噪聲)具有很強(qiang)(qiang)的(de)(de)(de)(de)(de)互(hu)通(tong)性，當分(fen)(fen)(fen)(fen)(fen)頻(pin)發(fa)(fa)射(she)(she)的(de)(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)(hao)超過50dB時(shi)，其(qi)抗千(qian)擾(rao)(rao)能力(li)(li)就會減弱。另外，在(zai)一些(xie)有噪音的(de)(de)(de)(de)(de)環境中使用分(fen)(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)(shu)，會使分(fen)(fen)(fen)(fen)(fen)頻(pin)信(xin)(xin)號(hao)(hao)(hao)無法到達發(fa)(fa)射(she)(she)端的(de)(de)(de)(de)(de)接收(shou)機或(huo)者(zhe)造成(cheng)發(fa)(fa)射(she)(she)端信(xin)(xin)號(hao)(hao)(hao)與接收(shou)端信(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)(de)(de)糟合而造成(cheng)分(fen)(fen)(fen)(fen)(fen)頻(pin)或(huo)干(gan)(gan)擾(rao)(rao)(例(li)(li)如(ru)(ru)(ru)在(zai)使用室(shi)外電話時(shi)) 。而采用分(fen)(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)(shu)的(de)(de)(de)(de)(de)無線(xian)對講(jiang)系(xi)統(tong)由于發(fa)(fa)射(she)(she)功率小，分(fen)(fen)(fen)(fen)(fen)頻(pin)后的(de)(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)(hao)強(qiang)(qiang)度(du)比有線(xian)對講(jiang)系(xi)統(tong)高(gao)很多(在(zai)實(shi)際使用中分(fen)(fen)(fen)(fen)(fen)頻(pin)設備一般(ban)(ban)可以將系(xi)統(tong)信(xin)(xin)號(hao)(hao)(hao)分(fen)(fen)(fen)(fen)(fen)頻(pin)到50dB以上(shang)),信(xin)(xin)號(hao)(hao)(hao)不受干(gan)(gan)擾(rao)(rao)。如(ru)(ru)(ru)果采用分(fen)(fen)(fen)(fen)(fen)頻(pin)技(ji)術(shu)(shu)，需(xu)要(yao)在(zai)較大的(de)(de)(de)(de)(de)回波功率下(xia)才能實(shi)現(xian)(xian)信(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)(de)(de)分(fen)(fen)(fen)(fen)(fen)頻(pin)工作(如(ru)(ru)(ru)分(fen)(fen)(fen)(fen)(fen)頻(pin)器(qi)發(fa)(fa)射(she)(she)信(xin)(xin)號(hao)(hao)(hao)與接收(shou)信(xin)(xin)號(hao)(hao)(hao)重疊時(shi)產(chan)生的(de)(de)(de)(de)(de)千(qian)擾(rao)(rao))和發(fa)(fa)送(song)信(xin)(xin)號(hao)(hao)(hao)強(qiang)(qiang)度(du)降低(di)(同頻(pin)帶內的(de)(de)(de)(de)(de)兩只(zhi)天線(xian)對同一信(xin)(xin)道(dao)傳輸的(de)(de)(de)(de)(de)信(xin)(xin)號(hao)(hao)(hao)強(qiang)(qiang)度(du)基(ji)本一致);如(ru)(ru)(ru)果采用混響技(ji)術(shu)(shu)，則可以實(shi)現(xian)(xian)對無線(xian)信(xin)(xin)號(hao)(hao)(hao)干(gan)(gan)擾(rao)(rao)的(de)(de)(de)(de)(de)抑制或(huo)降低(di)。