由于(yu)在戶(hu)外、室內等區域，無(wu)線對(dui)講系(xi)統(tong)(tong)(tong)的(de)(de)信(xin)(xin)號強度較(jiao)(jiao)弱，而且采(cai)用(yong)(yong)頻率調制技術（如(ru) MHZ、 NMR、 BSI等）產(chan)生的(de)(de)信(xin)(xin)號傳(chuan)輸(shu)時延大(da)，傳(chuan)輸(shu)距離(li)遠。因(yin)此有(you)線對(dui)講系(xi)統(tong)(tong)(tong)不適合在戶(hu)外環境使(shi)(shi)(shi)用(yong)(yong)，特別(bie)(bie)是(shi)在冬天及(ji)低風速季節使(shi)(shi)(shi)用(yong)(yong)。雖然無(wu)線對(dui)講系(xi)統(tong)(tong)(tong)也(ye)有(you)著(zhu)不錯的(de)(de)效(xiao)果。但由于(yu)系(xi)統(tong)(tong)(tong)工作時會有(you)一定的(de)(de)干(gan)擾，使(shi)(shi)(shi)對(dui)講效(xiao)果下降，另外在信(xin)(xin)號較(jiao)(jiao)弱時對(dui)用(yong)(yong)戶(hu)語音(yin)產(chan)生了(le)影響。特別(bie)(bie)是(shi)在人員(yuan)復(fu)雜、通信(xin)(xin)距離(li)較(jiao)(jiao)短或(huo)需要較(jiao)(jiao)長(chang)時間(jian)使(shi)(shi)(shi)用(yong)(yong)時。因(yin)此，更需要有(you)一個可(ke)靠(kao)的(de)(de)無(wu)線對(dui)講系(xi)統(tong)(tong)(tong)提供與有(you)線對(dui)講系(xi)統(tong)(tong)(tong)一樣的(de)(de)語音(yin)信(xin)(xin)息與控制。無(wu)線對(dui)講系(xi)統(tong)(tong)(tong)具有(you)很高的(de)(de)靈活性，它(ta)能夠滿(man)足現場中(zhong)所有(you)環境使(shi)(shi)(shi)用(yong)(yong)需求(qiu)并(bing)能隨(sui)時切換（如(ru)在野外、戶(hu)外電話等),用(yong)(yong)戶(hu)可(ke)以在任何(he)地(di)點使(shi)(shi)(shi)用(yong)(yong)、隨(sui)時、隨(sui)地(di)進行通訊。使(shi)(shi)(shi)用(yong)(yong)方便、節省(sheng)成本、節約費用(yong)(yong)。下面我們來了(le)解一下無(wu)線對(dui)講系(xi)統(tong)(tong)(tong)它(ta)主(zhu)要是(shi)什么優點？

1.性(xing)(xing)能(neng)穩定(ding)，可(ke)靠性(xing)(xing)高(gao)

在(zai)(zai)(zai)相同無(wu)線(xian)(xian)傳(chuan)輸距離下(xia)，無(wu)線(xian)(xian)傳(chuan)輸信(xin)(xin)號(hao)更穩定由(you)于使(shi)用(yong)了功率(lv)放大(da)器來對(dui)無(wu)線(xian)(xian)信(xin)(xin)號(hao)進行壓縮和(he)放大(da)，使(shi)無(wu)線(xian)(xian)信(xin)(xin)號(hao)更加(jia)穩定可(ke)(ke)靠。無(wu)線(xian)(xian)信(xin)(xin)號(hao)在(zai)(zai)(zai)弱電(dian)磁環(huan)境下(xia)也能(neng)(neng)保(bao)持(chi)較(jiao)好的(de)(de)(de)性(xing)(xing)能(neng)(neng)。無(wu)線(xian)(xian)對(dui)講系(xi)(xi)統(tong)具(ju)有發射功率(lv)小、抗(kang)千(qian)擾(rao)能(neng)(neng)力(li)強(qiang)(與有線(xian)(xian)對(dui)講系(xi)(xi)統(tong)比較(jiao))和(he)抗(kang)電(dian)磁干擾(rao)能(neng)(neng)力(li)強(qiang)(與有線(xian)(xian)對(dui)講系(xi)(xi)統(tong)比較(jiao))的(de)(de)(de)特點。無(wu)線(xian)(xian)對(dui)講系(xi)(xi)統(tong)發射信(xin)(xin)號(hao)在(zai)(zai)(zai)發射前和(he)發射后(hou)均能(neng)(neng)保(bao)持(chi)良(liang)好的(de)(de)(de)性(xing)(xing)能(neng)(neng)，使(shi)用(yong)過程中，發射信(xin)(xin)號(hao)與接收信(xin)(xin)號(hao)完全不受任何(he)千(qian)擾(rao)，可(ke)(ke)保(bao)持(chi)很(hen)好的(de)(de)(de)穩定性(xing)(xing)，具(ju)有良(liang)好的(de)(de)(de)抗(kang)千(qian)擾(rao)性(xing)(xing)和(he)抗(kang)低頻干擾(rao)能(neng)(neng)力(li)，即使(shi)在(zai)(zai)(zai)惡劣的(de)(de)(de)環(huan)境下(xia)也能(neng)(neng)保(bao)持(chi)較(jiao)好的(de)(de)(de)性(xing)(xing)能(neng)(neng)。因此無(wu)線(xian)(xian)系(xi)(xi)統(tong)有較(jiao)高(gao)的(de)(de)(de)可(ke)(ke)靠性(xing)(xing)。

2.功耗小、不受天氣、濕(shi)度(du)的影響(xiang)

無(wu)線(xian)(xian)對(dui)(dui)(dui)講(jiang)系統(tong)在(zai)不(bu)(bu)同的(de)環(huan)(huan)境中，無(wu)線(xian)(xian)通(tong)信(xin)設備(bei)和有線(xian)(xian)通(tong)信(xin)設備(bei)一(yi)樣都(dou)要(yao)進(jin)行電能(neng)的(de)消(xiao)耗(hao)(hao)。當(dang)環(huan)(huan)境溫(wen)度(du)在(zai)-40°C以下時，無(wu)線(xian)(xian)通(tong)信(xin)設備(bei)需要(yao)每(mei)(mei)天(tian)工作(zuo)(zuo)(zuo)8小(xiao)時左右(you);當(dang)環(huan)(huan)境溫(wen)度(du)為(wei)(wei)-20°C時，每(mei)(mei)天(tian)工作(zuo)(zuo)(zuo)8小(xiao)時左右(you);當(dang)環(huan)(huan)境溫(wen)度(du)為(wei)(wei)-30°C時，每(mei)(mei)天(tian)工作(zuo)(zuo)(zuo)4小(xiao)時左右(you)。目前市場上(shang)常(chang)見的(de)無(wu)線(xian)(xian)對(dui)(dui)(dui)講(jiang)系統(tong)有兩(liang)種(zhong)(zhong)電源(yuan)(yuan)輸(shu)入(ru)方式，一(yi)種(zhong)(zhong)是(shi)電源(yuan)(yuan)輸(shu)入(ru)，另一(yi)種(zhong)(zhong)是(shi)電源(yuan)(yuan)輸(shu)出。從這(zhe)兩(liang)種(zhong)(zhong)方式對(dui)(dui)(dui)系統(tong)的(de)功耗(hao)(hao)來看，電源(yuan)(yuan)輸(shu)入(ru)方式的(de)功耗(hao)(hao)更(geng)大(da)一(yi)些，但(dan)是(shi)功耗(hao)(hao)很(hen)小(xiao)。并且設備(bei)的(de)工作(zuo)(zuo)(zuo)環(huan)(huan)境不(bu)(bu)同，對(dui)(dui)(dui)電池的(de)需求量(liang)也(ye)不(bu)(bu)同，所(suo)以功耗(hao)(hao)也(ye)不(bu)(bu)同。

3信號不受干擾

在(zai)(zai)一(yi)些有干擾(rao)的(de)(de)(de)地方，例(li)如(ru)(ru)野外(wai)、機場(chang)、工廠等(deng)，一(yi)般采(cai)用(yong)(yong)(yong)(yong)分(fen)頻(pin)(pin)(pin)方式(shi)。分(fen)頻(pin)(pin)(pin)方式(shi)的(de)(de)(de)抗(kang)干擾(rao)能(neng)力(li)(li)不(bu)強(qiang)，其抗(kang)干擾(rao)能(neng)力(li)(li)主要(yao)取決于(yu)射頻(pin)(pin)(pin)功(gong)(gong)率的(de)(de)(de)大小(xiao)。分(fen)頻(pin)(pin)(pin)技(ji)術的(de)(de)(de)功(gong)(gong)率一(yi)般是50dB在(zai)(zai)50dB左右時(shi)，其抗(kang)干擾(rao)能(neng)力(li)(li)強(qiang)。但由于(yu)分(fen)頻(pin)(pin)(pin)的(de)(de)(de)干擾(rao)與噪聲(sheng)(主要(yao)是周邊噪聲(sheng))具有很強(qiang)的(de)(de)(de)互通(tong)性(xing)，當分(fen)頻(pin)(pin)(pin)發射的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)超過50dB時(shi)，其抗(kang)千擾(rao)能(neng)力(li)(li)就會減弱。另外(wai)，在(zai)(zai)一(yi)些有噪音(yin)的(de)(de)(de)環境中(zhong)使(shi)(shi)用(yong)(yong)(yong)(yong)分(fen)頻(pin)(pin)(pin)技(ji)術，會使(shi)(shi)分(fen)頻(pin)(pin)(pin)信(xin)(xin)(xin)(xin)號(hao)(hao)無(wu)法到達發射端的(de)(de)(de)接收機或者造成(cheng)發射端信(xin)(xin)(xin)(xin)號(hao)(hao)與接收端信(xin)(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)糟合而造成(cheng)分(fen)頻(pin)(pin)(pin)或干擾(rao)(例(li)如(ru)(ru)在(zai)(zai)使(shi)(shi)用(yong)(yong)(yong)(yong)室外(wai)電話時(shi)) 。而采(cai)用(yong)(yong)(yong)(yong)分(fen)頻(pin)(pin)(pin)技(ji)術的(de)(de)(de)無(wu)線對講(jiang)系統(tong)由于(yu)發射功(gong)(gong)率小(xiao)，分(fen)頻(pin)(pin)(pin)后的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)度(du)比有線對講(jiang)系統(tong)高很多(duo)(在(zai)(zai)實(shi)際使(shi)(shi)用(yong)(yong)(yong)(yong)中(zhong)分(fen)頻(pin)(pin)(pin)設備一(yi)般可(ke)以將系統(tong)信(xin)(xin)(xin)(xin)號(hao)(hao)分(fen)頻(pin)(pin)(pin)到50dB以上),信(xin)(xin)(xin)(xin)號(hao)(hao)不(bu)受干擾(rao)。如(ru)(ru)果采(cai)用(yong)(yong)(yong)(yong)分(fen)頻(pin)(pin)(pin)技(ji)術，需要(yao)在(zai)(zai)較大的(de)(de)(de)回波功(gong)(gong)率下才能(neng)實(shi)現信(xin)(xin)(xin)(xin)號(hao)(hao)的(de)(de)(de)分(fen)頻(pin)(pin)(pin)工作(如(ru)(ru)分(fen)頻(pin)(pin)(pin)器發射信(xin)(xin)(xin)(xin)號(hao)(hao)與接收信(xin)(xin)(xin)(xin)號(hao)(hao)重(zhong)疊時(shi)產生的(de)(de)(de)千擾(rao))和發送信(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)度(du)降低(同頻(pin)(pin)(pin)帶(dai)內的(de)(de)(de)兩只天線對同一(yi)信(xin)(xin)(xin)(xin)道(dao)傳輸的(de)(de)(de)信(xin)(xin)(xin)(xin)號(hao)(hao)強(qiang)度(du)基(ji)本一(yi)致);如(ru)(ru)果采(cai)用(yong)(yong)(yong)(yong)混響技(ji)術，則可(ke)以實(shi)現對無(wu)線信(xin)(xin)(xin)(xin)號(hao)(hao)干擾(rao)的(de)(de)(de)抑制(zhi)或降低。