由于(yu)在(zai)(zai)戶(hu)外(wai)、室內等區域，無線(xian)對(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)的信號強度較弱，而且采用(yong)(yong)頻(pin)率(lv)調制技術(shu)（如 MHZ、 NMR、 BSI等）產生的信號傳輸時(shi)延大，傳輸距(ju)離遠(yuan)。因此有(you)(you)(you)線(xian)對(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)不(bu)(bu)適合(he)在(zai)(zai)戶(hu)外(wai)環境(jing)(jing)使(shi)(shi)用(yong)(yong)，特別(bie)是在(zai)(zai)冬天及低(di)風速季節(jie)使(shi)(shi)用(yong)(yong)。雖然(ran)無線(xian)對(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)也有(you)(you)(you)著(zhu)不(bu)(bu)錯(cuo)的效(xiao)果(guo)。但由于(yu)系(xi)(xi)(xi)統(tong)工作時(shi)會有(you)(you)(you)一定的干(gan)擾，使(shi)(shi)對(dui)(dui)講(jiang)(jiang)(jiang)效(xiao)果(guo)下(xia)降(jiang)，另外(wai)在(zai)(zai)信號較弱時(shi)對(dui)(dui)用(yong)(yong)戶(hu)語音(yin)產生了影響。特別(bie)是在(zai)(zai)人(ren)員復雜、通(tong)信距(ju)離較短或需要較長時(shi)間使(shi)(shi)用(yong)(yong)時(shi)。因此，更需要有(you)(you)(you)一個(ge)可(ke)靠(kao)的無線(xian)對(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)提(ti)供與(yu)有(you)(you)(you)線(xian)對(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)一樣的語音(yin)信息與(yu)控制。無線(xian)對(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)具有(you)(you)(you)很高的靈活(huo)性，它能夠滿(man)足現(xian)場中所有(you)(you)(you)環境(jing)(jing)使(shi)(shi)用(yong)(yong)需求并能隨(sui)時(shi)切(qie)換（如在(zai)(zai)野外(wai)、戶(hu)外(wai)電話等),用(yong)(yong)戶(hu)可(ke)以在(zai)(zai)任何地(di)點使(shi)(shi)用(yong)(yong)、隨(sui)時(shi)、隨(sui)地(di)進行通(tong)訊。使(shi)(shi)用(yong)(yong)方(fang)便、節(jie)省(sheng)成本、節(jie)約費(fei)用(yong)(yong)。下(xia)面我們來了解一下(xia)無線(xian)對(dui)(dui)講(jiang)(jiang)(jiang)系(xi)(xi)(xi)統(tong)它主要是什么優點？

1.性能穩定，可靠性高(gao)

在(zai)(zai)相同無(wu)(wu)(wu)線(xian)(xian)(xian)(xian)傳(chuan)輸距離下(xia)，無(wu)(wu)(wu)線(xian)(xian)(xian)(xian)傳(chuan)輸信(xin)(xin)號(hao)(hao)更穩定由于(yu)使(shi)用了功(gong)率(lv)放大器(qi)來對(dui)(dui)無(wu)(wu)(wu)線(xian)(xian)(xian)(xian)信(xin)(xin)號(hao)(hao)進行壓縮和放大，使(shi)無(wu)(wu)(wu)線(xian)(xian)(xian)(xian)信(xin)(xin)號(hao)(hao)更加穩定可靠。無(wu)(wu)(wu)線(xian)(xian)(xian)(xian)信(xin)(xin)號(hao)(hao)在(zai)(zai)弱電磁環(huan)境(jing)下(xia)也(ye)能(neng)(neng)(neng)保(bao)持(chi)較好(hao)的(de)(de)(de)性能(neng)(neng)(neng)。無(wu)(wu)(wu)線(xian)(xian)(xian)(xian)對(dui)(dui)講系(xi)(xi)統(tong)(tong)具有(you)(you)發射(she)功(gong)率(lv)小、抗千(qian)擾(rao)能(neng)(neng)(neng)力(li)強(與(yu)有(you)(you)線(xian)(xian)(xian)(xian)對(dui)(dui)講系(xi)(xi)統(tong)(tong)比較)和抗電磁干擾(rao)能(neng)(neng)(neng)力(li)強(與(yu)有(you)(you)線(xian)(xian)(xian)(xian)對(dui)(dui)講系(xi)(xi)統(tong)(tong)比較)的(de)(de)(de)特(te)點。無(wu)(wu)(wu)線(xian)(xian)(xian)(xian)對(dui)(dui)講系(xi)(xi)統(tong)(tong)發射(she)信(xin)(xin)號(hao)(hao)在(zai)(zai)發射(she)前和發射(she)后均能(neng)(neng)(neng)保(bao)持(chi)良好(hao)的(de)(de)(de)性能(neng)(neng)(neng)，使(shi)用過(guo)程中，發射(she)信(xin)(xin)號(hao)(hao)與(yu)接收信(xin)(xin)號(hao)(hao)完(wan)全不(bu)受任(ren)何(he)千(qian)擾(rao)，可保(bao)持(chi)很好(hao)的(de)(de)(de)穩定性，具有(you)(you)良好(hao)的(de)(de)(de)抗千(qian)擾(rao)性和抗低頻(pin)干擾(rao)能(neng)(neng)(neng)力(li)，即使(shi)在(zai)(zai)惡劣的(de)(de)(de)環(huan)境(jing)下(xia)也(ye)能(neng)(neng)(neng)保(bao)持(chi)較好(hao)的(de)(de)(de)性能(neng)(neng)(neng)。因此無(wu)(wu)(wu)線(xian)(xian)(xian)(xian)系(xi)(xi)統(tong)(tong)有(you)(you)較高(gao)的(de)(de)(de)可靠性。

2.功耗小、不受(shou)天氣、濕度(du)的影響

無(wu)線對講(jiang)系(xi)(xi)統(tong)在(zai)不(bu)同(tong)的(de)環(huan)境(jing)中，無(wu)線通(tong)(tong)信(xin)(xin)(xin)設(she)備(bei)和有(you)線通(tong)(tong)信(xin)(xin)(xin)設(she)備(bei)一樣都要進行電(dian)能的(de)消耗(hao)。當(dang)(dang)環(huan)境(jing)溫度在(zai)-40°C以下時，無(wu)線通(tong)(tong)信(xin)(xin)(xin)設(she)備(bei)需要每(mei)天工(gong)作(zuo)(zuo)8小(xiao)時左右(you);當(dang)(dang)環(huan)境(jing)溫度為(wei)-20°C時，每(mei)天工(gong)作(zuo)(zuo)8小(xiao)時左右(you);當(dang)(dang)環(huan)境(jing)溫度為(wei)-30°C時，每(mei)天工(gong)作(zuo)(zuo)4小(xiao)時左右(you)。目(mu)前(qian)市場上常見的(de)無(wu)線對講(jiang)系(xi)(xi)統(tong)有(you)兩種電(dian)源輸(shu)入方式，一種是電(dian)源輸(shu)入，另(ling)一種是電(dian)源輸(shu)出。從(cong)這兩種方式對系(xi)(xi)統(tong)的(de)功(gong)耗(hao)來看，電(dian)源輸(shu)入方式的(de)功(gong)耗(hao)更(geng)大一些，但是功(gong)耗(hao)很小(xiao)。并(bing)且設(she)備(bei)的(de)工(gong)作(zuo)(zuo)環(huan)境(jing)不(bu)同(tong)，對電(dian)池的(de)需求量也不(bu)同(tong)，所以功(gong)耗(hao)也不(bu)同(tong)。

3信號不受干擾

在(zai)(zai)(zai)一(yi)些有(you)(you)干擾的(de)(de)(de)地方，例如(ru)(ru)野外(wai)、機場、工(gong)廠等(deng)，一(yi)般(ban)(ban)采(cai)(cai)(cai)用(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)方式(shi)。分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)方式(shi)的(de)(de)(de)抗干擾能(neng)力(li)不(bu)強(qiang)，其抗干擾能(neng)力(li)主(zhu)要取決于射(she)(she)頻(pin)(pin)(pin)(pin)功率的(de)(de)(de)大小(xiao)(xiao)。分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術(shu)的(de)(de)(de)功率一(yi)般(ban)(ban)是50dB在(zai)(zai)(zai)50dB左右時(shi)(shi)，其抗干擾能(neng)力(li)強(qiang)。但由于分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)的(de)(de)(de)干擾與噪聲(sheng)(sheng)(主(zhu)要是周邊(bian)噪聲(sheng)(sheng))具有(you)(you)很強(qiang)的(de)(de)(de)互通(tong)性(xing)，當分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)發(fa)射(she)(she)的(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)超過50dB時(shi)(shi)，其抗千擾能(neng)力(li)就會減弱。另外(wai)，在(zai)(zai)(zai)一(yi)些有(you)(you)噪音的(de)(de)(de)環境(jing)中使用(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術(shu)，會使分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)信(xin)(xin)(xin)號(hao)(hao)(hao)無(wu)法(fa)到達發(fa)射(she)(she)端(duan)的(de)(de)(de)接(jie)收(shou)機或(huo)者造成發(fa)射(she)(she)端(duan)信(xin)(xin)(xin)號(hao)(hao)(hao)與接(jie)收(shou)端(duan)信(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)糟合(he)而(er)造成分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)或(huo)干擾(例如(ru)(ru)在(zai)(zai)(zai)使用(yong)室外(wai)電話(hua)時(shi)(shi)) 。而(er)采(cai)(cai)(cai)用(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術(shu)的(de)(de)(de)無(wu)線(xian)對(dui)講系(xi)統(tong)(tong)由于發(fa)射(she)(she)功率小(xiao)(xiao)，分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)后的(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)強(qiang)度(du)比有(you)(you)線(xian)對(dui)講系(xi)統(tong)(tong)高(gao)很多(在(zai)(zai)(zai)實(shi)(shi)際使用(yong)中分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)設備一(yi)般(ban)(ban)可(ke)以將系(xi)統(tong)(tong)信(xin)(xin)(xin)號(hao)(hao)(hao)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)到50dB以上),信(xin)(xin)(xin)號(hao)(hao)(hao)不(bu)受干擾。如(ru)(ru)果采(cai)(cai)(cai)用(yong)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)(ji)(ji)術(shu)，需要在(zai)(zai)(zai)較大的(de)(de)(de)回波功率下(xia)才能(neng)實(shi)(shi)現信(xin)(xin)(xin)號(hao)(hao)(hao)的(de)(de)(de)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)工(gong)作(如(ru)(ru)分(fen)(fen)(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)器發(fa)射(she)(she)信(xin)(xin)(xin)號(hao)(hao)(hao)與接(jie)收(shou)信(xin)(xin)(xin)號(hao)(hao)(hao)重(zhong)疊時(shi)(shi)產生的(de)(de)(de)千擾)和發(fa)送信(xin)(xin)(xin)號(hao)(hao)(hao)強(qiang)度(du)降低(di)(同頻(pin)(pin)(pin)(pin)帶內的(de)(de)(de)兩只天線(xian)對(dui)同一(yi)信(xin)(xin)(xin)道(dao)傳輸的(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)強(qiang)度(du)基本一(yi)致);如(ru)(ru)果采(cai)(cai)(cai)用(yong)混響技(ji)(ji)(ji)術(shu)，則可(ke)以實(shi)(shi)現對(dui)無(wu)線(xian)信(xin)(xin)(xin)號(hao)(hao)(hao)干擾的(de)(de)(de)抑制或(huo)降低(di)。