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甘肅無線對講系統有什么優點?
由于在戶(hu)外(wai)、室內等區(qu)域,無(wu)(wu)(wu)線對(dui)講(jiang)系(xi)(xi)統的(de)(de)(de)信(xin)號(hao)強度較(jiao)弱(ruo),而且采用(yong)(yong)頻率(lv)調制技術(如(ru) MHZ、 NMR、 BSI等)產(chan)生(sheng)的(de)(de)(de)信(xin)號(hao)傳(chuan)輸時(shi)(shi)延大,傳(chuan)輸距離(li)遠。因此有(you)(you)線對(dui)講(jiang)系(xi)(xi)統不適合在戶(hu)外(wai)環境(jing)使(shi)(shi)(shi)用(yong)(yong),特別是(shi)在冬天及低風速季節使(shi)(shi)(shi)用(yong)(yong)。雖(sui)然無(wu)(wu)(wu)線對(dui)講(jiang)系(xi)(xi)統也有(you)(you)著不錯的(de)(de)(de)效(xiao)果。但由于系(xi)(xi)統工作時(shi)(shi)會有(you)(you)一(yi)定的(de)(de)(de)干擾,使(shi)(shi)(shi)對(dui)講(jiang)效(xiao)果下(xia)降,另外(wai)在信(xin)號(hao)較(jiao)弱(ruo)時(shi)(shi)對(dui)用(yong)(yong)戶(hu)語(yu)音(yin)產(chan)生(sheng)了(le)影響。特別是(shi)在人員復雜、通(tong)(tong)信(xin)距離(li)較(jiao)短或需要(yao)較(jiao)長時(shi)(shi)間使(shi)(shi)(shi)用(yong)(yong)時(shi)(shi)。因此,更需要(yao)有(you)(you)一(yi)個可(ke)靠的(de)(de)(de)無(wu)(wu)(wu)線對(dui)講(jiang)系(xi)(xi)統提(ti)供(gong)與(yu)有(you)(you)線對(dui)講(jiang)系(xi)(xi)統一(yi)樣的(de)(de)(de)語(yu)音(yin)信(xin)息(xi)與(yu)控(kong)制。無(wu)(wu)(wu)線對(dui)講(jiang)系(xi)(xi)統具有(you)(you)很高的(de)(de)(de)靈活性(xing),它能夠滿足現場中所有(you)(you)環境(jing)使(shi)(shi)(shi)用(yong)(yong)需求并能隨(sui)時(shi)(shi)切換(如(ru)在野外(wai)、戶(hu)外(wai)電話等),用(yong)(yong)戶(hu)可(ke)以在任何(he)地點(dian)使(shi)(shi)(shi)用(yong)(yong)、隨(sui)時(shi)(shi)、隨(sui)地進行(xing)通(tong)(tong)訊。使(shi)(shi)(shi)用(yong)(yong)方(fang)便、節省成本、節約費用(yong)(yong)。下(xia)面我們來了(le)解一(yi)下(xia)無(wu)(wu)(wu)線對(dui)講(jiang)系(xi)(xi)統它主要(yao)是(shi)什么優(you)點(dian)?
1.性能穩(wen)定(ding),可靠(kao)性高
在相同無(wu)(wu)(wu)線(xian)(xian)(xian)傳(chuan)輸距離下(xia)(xia),無(wu)(wu)(wu)線(xian)(xian)(xian)傳(chuan)輸信號(hao)(hao)更穩(wen)定由于使(shi)(shi)用了功(gong)率放大器來對無(wu)(wu)(wu)線(xian)(xian)(xian)信號(hao)(hao)進行壓縮(suo)和放大,使(shi)(shi)無(wu)(wu)(wu)線(xian)(xian)(xian)信號(hao)(hao)更加(jia)穩(wen)定可靠。無(wu)(wu)(wu)線(xian)(xian)(xian)信號(hao)(hao)在弱電(dian)磁(ci)環(huan)境下(xia)(xia)也(ye)能(neng)(neng)保(bao)持(chi)(chi)較好(hao)(hao)的(de)(de)性(xing)(xing)能(neng)(neng)。無(wu)(wu)(wu)線(xian)(xian)(xian)對講(jiang)系(xi)統具(ju)有發射(she)功(gong)率小、抗(kang)千擾(rao)(rao)能(neng)(neng)力(li)強(qiang)(與有線(xian)(xian)(xian)對講(jiang)系(xi)統比較)和抗(kang)電(dian)磁(ci)干擾(rao)(rao)能(neng)(neng)力(li)強(qiang)(與有線(xian)(xian)(xian)對講(jiang)系(xi)統比較)的(de)(de)特點(dian)。無(wu)(wu)(wu)線(xian)(xian)(xian)對講(jiang)系(xi)統發射(she)信號(hao)(hao)在發射(she)前和發射(she)后均能(neng)(neng)保(bao)持(chi)(chi)良好(hao)(hao)的(de)(de)性(xing)(xing)能(neng)(neng),使(shi)(shi)用過程中,發射(she)信號(hao)(hao)與接收信號(hao)(hao)完全不受任何千擾(rao)(rao),可保(bao)持(chi)(chi)很好(hao)(hao)的(de)(de)穩(wen)定性(xing)(xing),具(ju)有良好(hao)(hao)的(de)(de)抗(kang)千擾(rao)(rao)性(xing)(xing)和抗(kang)低頻干擾(rao)(rao)能(neng)(neng)力(li),即使(shi)(shi)在惡(e)劣的(de)(de)環(huan)境下(xia)(xia)也(ye)能(neng)(neng)保(bao)持(chi)(chi)較好(hao)(hao)的(de)(de)性(xing)(xing)能(neng)(neng)。因此(ci)無(wu)(wu)(wu)線(xian)(xian)(xian)系(xi)統有較高的(de)(de)可靠性(xing)(xing)。
2.功(gong)耗小、不受天氣(qi)、濕度的影響
無(wu)線對(dui)講系統(tong)在不同(tong)(tong)的(de)環(huan)境(jing)中,無(wu)線通(tong)(tong)信(xin)設(she)備(bei)和(he)有線通(tong)(tong)信(xin)設(she)備(bei)一(yi)樣都要進行電(dian)(dian)能的(de)消(xiao)耗(hao)(hao)(hao)(hao)。當(dang)環(huan)境(jing)溫度(du)在-40°C以下(xia)時,無(wu)線通(tong)(tong)信(xin)設(she)備(bei)需要每(mei)天工(gong)作(zuo)(zuo)8小時左(zuo)右(you)(you);當(dang)環(huan)境(jing)溫度(du)為(wei)-20°C時,每(mei)天工(gong)作(zuo)(zuo)8小時左(zuo)右(you)(you);當(dang)環(huan)境(jing)溫度(du)為(wei)-30°C時,每(mei)天工(gong)作(zuo)(zuo)4小時左(zuo)右(you)(you)。目(mu)前市場上常(chang)見(jian)的(de)無(wu)線對(dui)講系統(tong)有兩種(zhong)(zhong)電(dian)(dian)源(yuan)(yuan)輸入方(fang)式(shi),一(yi)種(zhong)(zhong)是電(dian)(dian)源(yuan)(yuan)輸入,另(ling)一(yi)種(zhong)(zhong)是電(dian)(dian)源(yuan)(yuan)輸出。從這兩種(zhong)(zhong)方(fang)式(shi)對(dui)系統(tong)的(de)功(gong)(gong)耗(hao)(hao)(hao)(hao)來看(kan),電(dian)(dian)源(yuan)(yuan)輸入方(fang)式(shi)的(de)功(gong)(gong)耗(hao)(hao)(hao)(hao)更(geng)大一(yi)些,但是功(gong)(gong)耗(hao)(hao)(hao)(hao)很(hen)小。并且設(she)備(bei)的(de)工(gong)作(zuo)(zuo)環(huan)境(jing)不同(tong)(tong),對(dui)電(dian)(dian)池的(de)需求量(liang)也(ye)(ye)不同(tong)(tong),所(suo)以功(gong)(gong)耗(hao)(hao)(hao)(hao)也(ye)(ye)不同(tong)(tong)。
3信號不受干擾
在一(yi)(yi)些(xie)有(you)干(gan)(gan)擾(rao)的(de)(de)(de)(de)(de)(de)(de)地方,例如野外(wai)、機場、工(gong)廠(chang)等,一(yi)(yi)般采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)方式。分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)方式的(de)(de)(de)(de)(de)(de)(de)抗(kang)(kang)干(gan)(gan)擾(rao)能(neng)力(li)不(bu)強(qiang),其抗(kang)(kang)干(gan)(gan)擾(rao)能(neng)力(li)主要(yao)(yao)取決(jue)于(yu)射頻(pin)(pin)(pin)(pin)功率(lv)的(de)(de)(de)(de)(de)(de)(de)大小(xiao)。分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)術的(de)(de)(de)(de)(de)(de)(de)功率(lv)一(yi)(yi)般是(shi)50dB在50dB左右時,其抗(kang)(kang)干(gan)(gan)擾(rao)能(neng)力(li)強(qiang)。但(dan)由(you)于(yu)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)的(de)(de)(de)(de)(de)(de)(de)干(gan)(gan)擾(rao)與(yu)噪聲(sheng)(主要(yao)(yao)是(shi)周邊(bian)噪聲(sheng))具有(you)很強(qiang)的(de)(de)(de)(de)(de)(de)(de)互通性,當分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)發(fa)(fa)(fa)射的(de)(de)(de)(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)超(chao)過50dB時,其抗(kang)(kang)千(qian)擾(rao)能(neng)力(li)就(jiu)會(hui)減弱。另外(wai),在一(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)(fen)頻(pin)(pin)(pin)(pin)技(ji)術,會(hui)使(shi)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)無法到達(da)發(fa)(fa)(fa)射端(duan)的(de)(de)(de)(de)(de)(de)(de)接收機或者造成發(fa)(fa)(fa)射端(duan)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與(yu)接收端(duan)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)(de)(de)(de)(de)糟合而造成分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)或干(gan)(gan)擾(rao)(例如在使(shi)用(yong)(yong)室外(wai)電話時) 。而采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)術的(de)(de)(de)(de)(de)(de)(de)無線(xian)對(dui)講系(xi)(xi)統(tong)(tong)由(you)于(yu)發(fa)(fa)(fa)射功率(lv)小(xiao),分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)后的(de)(de)(de)(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)度(du)比有(you)線(xian)對(dui)講系(xi)(xi)統(tong)(tong)高很多(在實(shi)際使(shi)用(yong)(yong)中分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)設備一(yi)(yi)般可以(yi)將系(xi)(xi)統(tong)(tong)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)到50dB以(yi)上),信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)不(bu)受干(gan)(gan)擾(rao)。如果(guo)采用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)技(ji)術,需(xu)要(yao)(yao)在較大的(de)(de)(de)(de)(de)(de)(de)回波功率(lv)下才能(neng)實(shi)現信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)(de)(de)(de)(de)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)工(gong)作(如分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)器發(fa)(fa)(fa)射信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與(yu)接收信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)重疊(die)時產生(sheng)的(de)(de)(de)(de)(de)(de)(de)千(qian)擾(rao))和發(fa)(fa)(fa)送信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)度(du)降(jiang)低(同頻(pin)(pin)(pin)(pin)帶內的(de)(de)(de)(de)(de)(de)(de)兩只天線(xian)對(dui)同一(yi)(yi)信(xin)(xin)(xin)道(dao)傳輸的(de)(de)(de)(de)(de)(de)(de)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強(qiang)度(du)基(ji)本一(yi)(yi)致);如果(guo)采用(yong)(yong)混響技(ji)術,則(ze)可以(yi)實(shi)現對(dui)無線(xian)信(xin)(xin)(xin)號(hao)(hao)(hao)(hao)干(gan)(gan)擾(rao)的(de)(de)(de)(de)(de)(de)(de)抑制或降(jiang)低。
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