由于(yu)在(zai)(zai)(zai)戶(hu)外(wai)(wai)、室內等(deng)區域，無線(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)的(de)信(xin)(xin)(xin)號(hao)強度較(jiao)弱(ruo)，而且采(cai)用(yong)(yong)頻率調制技術（如(ru) MHZ、 NMR、 BSI等(deng)）產生(sheng)的(de)信(xin)(xin)(xin)號(hao)傳輸(shu)時(shi)延(yan)大，傳輸(shu)距離(li)遠。因此有(you)線(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)不適(shi)合(he)在(zai)(zai)(zai)戶(hu)外(wai)(wai)環境(jing)使用(yong)(yong)，特別是在(zai)(zai)(zai)冬(dong)天及低風速(su)季節使用(yong)(yong)。雖(sui)然(ran)無線(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)也有(you)著(zhu)不錯的(de)效果。但由于(yu)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)工作(zuo)時(shi)會有(you)一定的(de)干擾，使對(dui)(dui)(dui)講(jiang)效果下降，另外(wai)(wai)在(zai)(zai)(zai)信(xin)(xin)(xin)號(hao)較(jiao)弱(ruo)時(shi)對(dui)(dui)(dui)用(yong)(yong)戶(hu)語(yu)音(yin)產生(sheng)了影響(xiang)。特別是在(zai)(zai)(zai)人員復雜(za)、通信(xin)(xin)(xin)距離(li)較(jiao)短或需(xu)要較(jiao)長時(shi)間使用(yong)(yong)時(shi)。因此，更需(xu)要有(you)一個可(ke)靠的(de)無線(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)提供與(yu)有(you)線(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)一樣的(de)語(yu)音(yin)信(xin)(xin)(xin)息(xi)與(yu)控制。無線(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)具有(you)很高(gao)的(de)靈活性(xing)，它能夠滿足現場中所(suo)有(you)環境(jing)使用(yong)(yong)需(xu)求并能隨(sui)時(shi)切換（如(ru)在(zai)(zai)(zai)野外(wai)(wai)、戶(hu)外(wai)(wai)電(dian)話(hua)等(deng)),用(yong)(yong)戶(hu)可(ke)以在(zai)(zai)(zai)任何地(di)點(dian)使用(yong)(yong)、隨(sui)時(shi)、隨(sui)地(di)進行通訊。使用(yong)(yong)方便(bian)、節省成本、節約費用(yong)(yong)。下面我(wo)們(men)來(lai)了解(jie)一下無線(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)(xi)(xi)統(tong)(tong)(tong)(tong)它主要是什么(me)優點(dian)？

1.性能穩定，可(ke)靠(kao)性高

在相同無(wu)(wu)線(xian)(xian)(xian)傳(chuan)輸距(ju)離下，無(wu)(wu)線(xian)(xian)(xian)傳(chuan)輸信(xin)(xin)號(hao)(hao)(hao)更穩定(ding)由于使用了(le)功率放大器(qi)來(lai)對(dui)(dui)無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)(hao)(hao)進行壓縮和(he)放大，使無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)(hao)(hao)更加穩定(ding)可靠。無(wu)(wu)線(xian)(xian)(xian)信(xin)(xin)號(hao)(hao)(hao)在弱電磁環(huan)境(jing)(jing)下也能(neng)(neng)保(bao)(bao)持較(jiao)好的(de)性(xing)(xing)能(neng)(neng)。無(wu)(wu)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)(tong)(tong)具有(you)(you)發射(she)(she)功率小(xiao)、抗(kang)(kang)千(qian)擾能(neng)(neng)力強(與(yu)有(you)(you)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)(tong)(tong)比較(jiao))和(he)抗(kang)(kang)電磁干(gan)(gan)擾能(neng)(neng)力強(與(yu)有(you)(you)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)(tong)(tong)比較(jiao))的(de)特點。無(wu)(wu)線(xian)(xian)(xian)對(dui)(dui)講(jiang)系(xi)統(tong)(tong)(tong)發射(she)(she)信(xin)(xin)號(hao)(hao)(hao)在發射(she)(she)前和(he)發射(she)(she)后均能(neng)(neng)保(bao)(bao)持良好的(de)性(xing)(xing)能(neng)(neng)，使用過程(cheng)中，發射(she)(she)信(xin)(xin)號(hao)(hao)(hao)與(yu)接收(shou)信(xin)(xin)號(hao)(hao)(hao)完全不受任何千(qian)擾，可保(bao)(bao)持很好的(de)穩定(ding)性(xing)(xing)，具有(you)(you)良好的(de)抗(kang)(kang)千(qian)擾性(xing)(xing)和(he)抗(kang)(kang)低頻干(gan)(gan)擾能(neng)(neng)力，即使在惡劣(lie)的(de)環(huan)境(jing)(jing)下也能(neng)(neng)保(bao)(bao)持較(jiao)好的(de)性(xing)(xing)能(neng)(neng)。因此無(wu)(wu)線(xian)(xian)(xian)系(xi)統(tong)(tong)(tong)有(you)(you)較(jiao)高的(de)可靠性(xing)(xing)。

2.功耗小、不受天(tian)氣、濕(shi)度(du)的(de)影響

無線(xian)對講系(xi)(xi)統在不(bu)同(tong)(tong)的(de)(de)環(huan)境中，無線(xian)通(tong)信(xin)設(she)備和有(you)線(xian)通(tong)信(xin)設(she)備一(yi)樣都要進(jin)行(xing)電(dian)(dian)(dian)能的(de)(de)消耗。當環(huan)境溫(wen)度在-40°C以下時(shi)(shi)，無線(xian)通(tong)信(xin)設(she)備需要每(mei)天(tian)工(gong)(gong)作(zuo)(zuo)8小(xiao)(xiao)時(shi)(shi)左(zuo)右;當環(huan)境溫(wen)度為(wei)-20°C時(shi)(shi)，每(mei)天(tian)工(gong)(gong)作(zuo)(zuo)8小(xiao)(xiao)時(shi)(shi)左(zuo)右;當環(huan)境溫(wen)度為(wei)-30°C時(shi)(shi)，每(mei)天(tian)工(gong)(gong)作(zuo)(zuo)4小(xiao)(xiao)時(shi)(shi)左(zuo)右。目前(qian)市場(chang)上(shang)常見的(de)(de)無線(xian)對講系(xi)(xi)統有(you)兩(liang)種(zhong)電(dian)(dian)(dian)源輸入方(fang)式，一(yi)種(zhong)是電(dian)(dian)(dian)源輸入，另一(yi)種(zhong)是電(dian)(dian)(dian)源輸出。從這(zhe)兩(liang)種(zhong)方(fang)式對系(xi)(xi)統的(de)(de)功耗來看，電(dian)(dian)(dian)源輸入方(fang)式的(de)(de)功耗更(geng)大一(yi)些，但是功耗很小(xiao)(xiao)。并且設(she)備的(de)(de)工(gong)(gong)作(zuo)(zuo)環(huan)境不(bu)同(tong)(tong)，對電(dian)(dian)(dian)池(chi)的(de)(de)需求量也不(bu)同(tong)(tong)，所以功耗也不(bu)同(tong)(tong)。

3信號不受干擾

在(zai)(zai)一(yi)(yi)些(xie)有(you)干(gan)擾的(de)(de)(de)(de)(de)(de)(de)地方(fang)，例如(ru)野外、機(ji)場、工廠等，一(yi)(yi)般采用(yong)(yong)分(fen)(fen)頻(pin)(pin)方(fang)式。分(fen)(fen)頻(pin)(pin)方(fang)式的(de)(de)(de)(de)(de)(de)(de)抗干(gan)擾能力(li)(li)不強(qiang)，其(qi)抗干(gan)擾能力(li)(li)主要(yao)取決于(yu)射頻(pin)(pin)功(gong)率(lv)的(de)(de)(de)(de)(de)(de)(de)大小(xiao)(xiao)。分(fen)(fen)頻(pin)(pin)技術(shu)(shu)(shu)的(de)(de)(de)(de)(de)(de)(de)功(gong)率(lv)一(yi)(yi)般是(shi)50dB在(zai)(zai)50dB左右時(shi)，其(qi)抗干(gan)擾能力(li)(li)強(qiang)。但由于(yu)分(fen)(fen)頻(pin)(pin)的(de)(de)(de)(de)(de)(de)(de)干(gan)擾與(yu)噪聲(主要(yao)是(shi)周(zhou)邊噪聲)具有(you)很強(qiang)的(de)(de)(de)(de)(de)(de)(de)互通性，當分(fen)(fen)頻(pin)(pin)發射的(de)(de)(de)(de)(de)(de)(de)信(xin)號超(chao)過50dB時(shi)，其(qi)抗千擾能力(li)(li)就會(hui)減弱。另外，在(zai)(zai)一(yi)(yi)些(xie)有(you)噪音的(de)(de)(de)(de)(de)(de)(de)環境(jing)中使(shi)用(yong)(yong)分(fen)(fen)頻(pin)(pin)技術(shu)(shu)(shu)，會(hui)使(shi)分(fen)(fen)頻(pin)(pin)信(xin)號無(wu)法到達發射端的(de)(de)(de)(de)(de)(de)(de)接收(shou)機(ji)或者造(zao)成(cheng)發射端信(xin)號與(yu)接收(shou)端信(xin)號的(de)(de)(de)(de)(de)(de)(de)糟合而造(zao)成(cheng)分(fen)(fen)頻(pin)(pin)或干(gan)擾(例如(ru)在(zai)(zai)使(shi)用(yong)(yong)室外電(dian)話(hua)時(shi)) 。而采用(yong)(yong)分(fen)(fen)頻(pin)(pin)技術(shu)(shu)(shu)的(de)(de)(de)(de)(de)(de)(de)無(wu)線(xian)對(dui)講(jiang)系(xi)統由于(yu)發射功(gong)率(lv)小(xiao)(xiao)，分(fen)(fen)頻(pin)(pin)后的(de)(de)(de)(de)(de)(de)(de)信(xin)號強(qiang)度(du)比有(you)線(xian)對(dui)講(jiang)系(xi)統高很多(在(zai)(zai)實(shi)際使(shi)用(yong)(yong)中分(fen)(fen)頻(pin)(pin)設備一(yi)(yi)般可以將系(xi)統信(xin)號分(fen)(fen)頻(pin)(pin)到50dB以上),信(xin)號不受干(gan)擾。如(ru)果(guo)采用(yong)(yong)分(fen)(fen)頻(pin)(pin)技術(shu)(shu)(shu)，需(xu)要(yao)在(zai)(zai)較(jiao)大的(de)(de)(de)(de)(de)(de)(de)回(hui)波功(gong)率(lv)下才能實(shi)現(xian)信(xin)號的(de)(de)(de)(de)(de)(de)(de)分(fen)(fen)頻(pin)(pin)工作(如(ru)分(fen)(fen)頻(pin)(pin)器發射信(xin)號與(yu)接收(shou)信(xin)號重疊時(shi)產生的(de)(de)(de)(de)(de)(de)(de)千擾)和發送信(xin)號強(qiang)度(du)降低(di)(同(tong)頻(pin)(pin)帶內的(de)(de)(de)(de)(de)(de)(de)兩只天線(xian)對(dui)同(tong)一(yi)(yi)信(xin)道傳輸的(de)(de)(de)(de)(de)(de)(de)信(xin)號強(qiang)度(du)基(ji)本一(yi)(yi)致);如(ru)果(guo)采用(yong)(yong)混響技術(shu)(shu)(shu)，則可以實(shi)現(xian)對(dui)無(wu)線(xian)信(xin)號干(gan)擾的(de)(de)(de)(de)(de)(de)(de)抑制或降低(di)。