由于在(zai)(zai)戶(hu)外(wai)、室內等(deng)(deng)區域(yu)，無線(xian)(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)的(de)(de)(de)信號強度較弱，而(er)且采(cai)用(yong)(yong)頻率(lv)調制技(ji)術（如 MHZ、 NMR、 BSI等(deng)(deng)）產(chan)生的(de)(de)(de)信號傳輸(shu)(shu)時(shi)(shi)延大，傳輸(shu)(shu)距(ju)離遠。因(yin)此有(you)(you)(you)線(xian)(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)不適(shi)合在(zai)(zai)戶(hu)外(wai)環(huan)境使用(yong)(yong)，特(te)別是在(zai)(zai)冬天及低風(feng)速季節(jie)使用(yong)(yong)。雖然(ran)無線(xian)(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)也(ye)有(you)(you)(you)著不錯的(de)(de)(de)效(xiao)果。但由于系(xi)(xi)統(tong)工作(zuo)時(shi)(shi)會有(you)(you)(you)一定的(de)(de)(de)干擾，使對(dui)(dui)(dui)講(jiang)(jiang)效(xiao)果下(xia)降，另(ling)外(wai)在(zai)(zai)信號較弱時(shi)(shi)對(dui)(dui)(dui)用(yong)(yong)戶(hu)語音(yin)產(chan)生了(le)影(ying)響。特(te)別是在(zai)(zai)人(ren)員(yuan)復雜、通信距(ju)離較短(duan)或需要較長時(shi)(shi)間使用(yong)(yong)時(shi)(shi)。因(yin)此，更需要有(you)(you)(you)一個可靠的(de)(de)(de)無線(xian)(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)提供與有(you)(you)(you)線(xian)(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)一樣的(de)(de)(de)語音(yin)信息與控制。無線(xian)(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)具有(you)(you)(you)很高(gao)的(de)(de)(de)靈活性，它能夠滿足現場中所有(you)(you)(you)環(huan)境使用(yong)(yong)需求并能隨(sui)時(shi)(shi)切換（如在(zai)(zai)野外(wai)、戶(hu)外(wai)電話等(deng)(deng)),用(yong)(yong)戶(hu)可以在(zai)(zai)任何地(di)點(dian)使用(yong)(yong)、隨(sui)時(shi)(shi)、隨(sui)地(di)進行通訊。使用(yong)(yong)方便(bian)、節(jie)省成本、節(jie)約費用(yong)(yong)。下(xia)面(mian)我(wo)們來了(le)解(jie)一下(xia)無線(xian)(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)(jiang)系(xi)(xi)統(tong)它主要是什(shen)么(me)優點(dian)？

1.性能(neng)穩定，可靠性高(gao)

在(zai)相同無(wu)(wu)(wu)線(xian)(xian)(xian)傳輸距離下，無(wu)(wu)(wu)線(xian)(xian)(xian)傳輸信(xin)(xin)號(hao)(hao)更穩(wen)定(ding)由于使(shi)用了功率(lv)放大器來對(dui)無(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)(hao)進行壓縮和(he)(he)放大，使(shi)無(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)(hao)更加(jia)穩(wen)定(ding)可靠。無(wu)(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)(hao)在(zai)弱(ruo)電磁(ci)環境下也能(neng)(neng)(neng)保持(chi)(chi)較好的(de)性(xing)能(neng)(neng)(neng)。無(wu)(wu)(wu)線(xian)(xian)(xian)對(dui)講系(xi)(xi)統具有(you)(you)發(fa)射功率(lv)小、抗千擾(rao)(rao)(rao)能(neng)(neng)(neng)力強(與有(you)(you)線(xian)(xian)(xian)對(dui)講系(xi)(xi)統比(bi)較)和(he)(he)抗電磁(ci)干(gan)擾(rao)(rao)(rao)能(neng)(neng)(neng)力強(與有(you)(you)線(xian)(xian)(xian)對(dui)講系(xi)(xi)統比(bi)較)的(de)特點。無(wu)(wu)(wu)線(xian)(xian)(xian)對(dui)講系(xi)(xi)統發(fa)射信(xin)(xin)號(hao)(hao)在(zai)發(fa)射前和(he)(he)發(fa)射后均能(neng)(neng)(neng)保持(chi)(chi)良(liang)好的(de)性(xing)能(neng)(neng)(neng)，使(shi)用過(guo)程(cheng)中，發(fa)射信(xin)(xin)號(hao)(hao)與接收信(xin)(xin)號(hao)(hao)完(wan)全不受任何千擾(rao)(rao)(rao)，可保持(chi)(chi)很(hen)好的(de)穩(wen)定(ding)性(xing)，具有(you)(you)良(liang)好的(de)抗千擾(rao)(rao)(rao)性(xing)和(he)(he)抗低頻干(gan)擾(rao)(rao)(rao)能(neng)(neng)(neng)力，即(ji)使(shi)在(zai)惡劣的(de)環境下也能(neng)(neng)(neng)保持(chi)(chi)較好的(de)性(xing)能(neng)(neng)(neng)。因(yin)此無(wu)(wu)(wu)線(xian)(xian)(xian)系(xi)(xi)統有(you)(you)較高的(de)可靠性(xing)。

2.功耗小、不受天氣(qi)、濕度的影(ying)響

無線對講(jiang)系統在不(bu)同的(de)環(huan)(huan)(huan)境(jing)中，無線通(tong)信設備(bei)(bei)和有線通(tong)信設備(bei)(bei)一(yi)樣(yang)都要進行電(dian)(dian)能的(de)消耗。當(dang)環(huan)(huan)(huan)境(jing)溫度(du)在-40°C以(yi)下(xia)時(shi)(shi)，無線通(tong)信設備(bei)(bei)需(xu)要每天工(gong)作(zuo)8小(xiao)時(shi)(shi)左(zuo)右(you);當(dang)環(huan)(huan)(huan)境(jing)溫度(du)為-20°C時(shi)(shi)，每天工(gong)作(zuo)8小(xiao)時(shi)(shi)左(zuo)右(you);當(dang)環(huan)(huan)(huan)境(jing)溫度(du)為-30°C時(shi)(shi)，每天工(gong)作(zuo)4小(xiao)時(shi)(shi)左(zuo)右(you)。目前市場上常見的(de)無線對講(jiang)系統有兩(liang)種(zhong)電(dian)(dian)源輸(shu)(shu)入方(fang)式，一(yi)種(zhong)是(shi)電(dian)(dian)源輸(shu)(shu)入，另一(yi)種(zhong)是(shi)電(dian)(dian)源輸(shu)(shu)出。從這兩(liang)種(zhong)方(fang)式對系統的(de)功(gong)耗來看，電(dian)(dian)源輸(shu)(shu)入方(fang)式的(de)功(gong)耗更大一(yi)些，但是(shi)功(gong)耗很小(xiao)。并且設備(bei)(bei)的(de)工(gong)作(zuo)環(huan)(huan)(huan)境(jing)不(bu)同，對電(dian)(dian)池的(de)需(xu)求量也不(bu)同，所以(yi)功(gong)耗也不(bu)同。

3信號不受干擾

在一(yi)(yi)些有(you)干擾(rao)(rao)(rao)的(de)(de)(de)地方，例(li)如野外、機場、工廠等，一(yi)(yi)般(ban)采(cai)(cai)用(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)方式。分(fen)(fen)(fen)頻(pin)(pin)(pin)方式的(de)(de)(de)抗干擾(rao)(rao)(rao)能力(li)不(bu)強(qiang)(qiang)(qiang)(qiang)，其(qi)抗干擾(rao)(rao)(rao)能力(li)主(zhu)要(yao)取決于射(she)頻(pin)(pin)(pin)功率的(de)(de)(de)大小。分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術的(de)(de)(de)功率一(yi)(yi)般(ban)是50dB在50dB左右時(shi)，其(qi)抗干擾(rao)(rao)(rao)能力(li)強(qiang)(qiang)(qiang)(qiang)。但由于分(fen)(fen)(fen)頻(pin)(pin)(pin)的(de)(de)(de)干擾(rao)(rao)(rao)與(yu)(yu)噪(zao)(zao)聲(主(zhu)要(yao)是周邊(bian)噪(zao)(zao)聲)具有(you)很(hen)(hen)強(qiang)(qiang)(qiang)(qiang)的(de)(de)(de)互通性，當(dang)分(fen)(fen)(fen)頻(pin)(pin)(pin)發(fa)射(she)的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)超過50dB時(shi)，其(qi)抗千擾(rao)(rao)(rao)能力(li)就會(hui)減(jian)弱。另外，在一(yi)(yi)些有(you)噪(zao)(zao)音的(de)(de)(de)環境中使(shi)用(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術，會(hui)使(shi)分(fen)(fen)(fen)頻(pin)(pin)(pin)信(xin)(xin)(xin)(xin)號(hao)(hao)無法到達(da)發(fa)射(she)端(duan)的(de)(de)(de)接(jie)收機或(huo)者造(zao)成發(fa)射(she)端(duan)信(xin)(xin)(xin)(xin)號(hao)(hao)與(yu)(yu)接(jie)收端(duan)信(xin)(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)糟合而造(zao)成分(fen)(fen)(fen)頻(pin)(pin)(pin)或(huo)干擾(rao)(rao)(rao)(例(li)如在使(shi)用(yong)室(shi)外電話時(shi)) 。而采(cai)(cai)用(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術的(de)(de)(de)無線對(dui)講(jiang)系(xi)統由于發(fa)射(she)功率小，分(fen)(fen)(fen)頻(pin)(pin)(pin)后(hou)的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)(qiang)(qiang)(qiang)度(du)(du)比有(you)線對(dui)講(jiang)系(xi)統高(gao)很(hen)(hen)多(在實(shi)(shi)際使(shi)用(yong)中分(fen)(fen)(fen)頻(pin)(pin)(pin)設備一(yi)(yi)般(ban)可(ke)以將系(xi)統信(xin)(xin)(xin)(xin)號(hao)(hao)分(fen)(fen)(fen)頻(pin)(pin)(pin)到50dB以上),信(xin)(xin)(xin)(xin)號(hao)(hao)不(bu)受干擾(rao)(rao)(rao)。如果(guo)采(cai)(cai)用(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)技(ji)術，需要(yao)在較大的(de)(de)(de)回波(bo)功率下(xia)才能實(shi)(shi)現信(xin)(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)分(fen)(fen)(fen)頻(pin)(pin)(pin)工作(如分(fen)(fen)(fen)頻(pin)(pin)(pin)器發(fa)射(she)信(xin)(xin)(xin)(xin)號(hao)(hao)與(yu)(yu)接(jie)收信(xin)(xin)(xin)(xin)號(hao)(hao)重疊時(shi)產生的(de)(de)(de)千擾(rao)(rao)(rao))和(he)發(fa)送(song)信(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)(qiang)(qiang)(qiang)度(du)(du)降低(同(tong)頻(pin)(pin)(pin)帶內的(de)(de)(de)兩只天線對(dui)同(tong)一(yi)(yi)信(xin)(xin)(xin)(xin)道傳輸(shu)的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)(qiang)(qiang)(qiang)度(du)(du)基本一(yi)(yi)致);如果(guo)采(cai)(cai)用(yong)混響技(ji)術，則(ze)可(ke)以實(shi)(shi)現對(dui)無線信(xin)(xin)(xin)(xin)號(hao)(hao)干擾(rao)(rao)(rao)的(de)(de)(de)抑制(zhi)或(huo)降低。