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屯昌無線對講系統有什么優點?
由(you)于(yu)在(zai)(zai)(zai)戶外(wai)、室內等(deng)區域,無(wu)(wu)線(xian)(xian)對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)的(de)信(xin)(xin)(xin)號強度較弱(ruo),而且采用(yong)(yong)(yong)頻率調制技術(如 MHZ、 NMR、 BSI等(deng))產(chan)生的(de)信(xin)(xin)(xin)號傳(chuan)輸時(shi)延(yan)大,傳(chuan)輸距離(li)遠(yuan)。因此有(you)(you)線(xian)(xian)對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)不適合在(zai)(zai)(zai)戶外(wai)環(huan)境使(shi)用(yong)(yong)(yong),特別是(shi)在(zai)(zai)(zai)冬天及低風(feng)速季節(jie)使(shi)用(yong)(yong)(yong)。雖然無(wu)(wu)線(xian)(xian)對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)也有(you)(you)著不錯(cuo)的(de)效果。但由(you)于(yu)系(xi)(xi)統(tong)(tong)工作時(shi)會有(you)(you)一定的(de)干擾,使(shi)對(dui)(dui)講(jiang)效果下降,另外(wai)在(zai)(zai)(zai)信(xin)(xin)(xin)號較弱(ruo)時(shi)對(dui)(dui)用(yong)(yong)(yong)戶語音產(chan)生了影響。特別是(shi)在(zai)(zai)(zai)人員復(fu)雜、通信(xin)(xin)(xin)距離(li)較短或需(xu)要較長時(shi)間使(shi)用(yong)(yong)(yong)時(shi)。因此,更(geng)需(xu)要有(you)(you)一個可靠的(de)無(wu)(wu)線(xian)(xian)對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)提供(gong)與有(you)(you)線(xian)(xian)對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)一樣的(de)語音信(xin)(xin)(xin)息與控制。無(wu)(wu)線(xian)(xian)對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)具有(you)(you)很高的(de)靈活性,它能夠滿(man)足現場(chang)中所有(you)(you)環(huan)境使(shi)用(yong)(yong)(yong)需(xu)求并能隨時(shi)切換(如在(zai)(zai)(zai)野外(wai)、戶外(wai)電話等(deng)),用(yong)(yong)(yong)戶可以在(zai)(zai)(zai)任何地點(dian)使(shi)用(yong)(yong)(yong)、隨時(shi)、隨地進行通訊(xun)。使(shi)用(yong)(yong)(yong)方(fang)便、節(jie)省成本(ben)、節(jie)約費用(yong)(yong)(yong)。下面我們來了解一下無(wu)(wu)線(xian)(xian)對(dui)(dui)講(jiang)系(xi)(xi)統(tong)(tong)它主要是(shi)什么優點(dian)?
1.性能穩定,可靠性高(gao)
在(zai)相同無(wu)(wu)(wu)線(xian)(xian)(xian)傳(chuan)輸(shu)距離下(xia)(xia),無(wu)(wu)(wu)線(xian)(xian)(xian)傳(chuan)輸(shu)信號更穩定由于使(shi)(shi)用(yong)了(le)功(gong)(gong)率(lv)放大(da)器來對無(wu)(wu)(wu)線(xian)(xian)(xian)信號進行壓(ya)縮和放大(da),使(shi)(shi)無(wu)(wu)(wu)線(xian)(xian)(xian)信號更加穩定可靠(kao)。無(wu)(wu)(wu)線(xian)(xian)(xian)信號在(zai)弱(ruo)電磁環境下(xia)(xia)也(ye)能保持(chi)較好的(de)(de)性能。無(wu)(wu)(wu)線(xian)(xian)(xian)對講系統(tong)具(ju)有(you)(you)發射功(gong)(gong)率(lv)小、抗(kang)千(qian)擾(rao)能力強(與(yu)有(you)(you)線(xian)(xian)(xian)對講系統(tong)比(bi)較)和抗(kang)電磁干擾(rao)能力強(與(yu)有(you)(you)線(xian)(xian)(xian)對講系統(tong)比(bi)較)的(de)(de)特(te)點(dian)。無(wu)(wu)(wu)線(xian)(xian)(xian)對講系統(tong)發射信號在(zai)發射前和發射后均能保持(chi)良好的(de)(de)性能,使(shi)(shi)用(yong)過程中(zhong),發射信號與(yu)接(jie)收(shou)信號完全不受(shou)任何千(qian)擾(rao),可保持(chi)很好的(de)(de)穩定性,具(ju)有(you)(you)良好的(de)(de)抗(kang)千(qian)擾(rao)性和抗(kang)低頻(pin)干擾(rao)能力,即使(shi)(shi)在(zai)惡劣的(de)(de)環境下(xia)(xia)也(ye)能保持(chi)較好的(de)(de)性能。因此無(wu)(wu)(wu)線(xian)(xian)(xian)系統(tong)有(you)(you)較高的(de)(de)可靠(kao)性。
2.功耗小、不受天氣、濕(shi)度(du)的影響
無(wu)(wu)線對講(jiang)系統(tong)(tong)在(zai)(zai)不(bu)(bu)(bu)同的(de)環(huan)境中(zhong),無(wu)(wu)線通信(xin)設備和有線通信(xin)設備一樣都要進行電能的(de)消(xiao)耗(hao)。當環(huan)境溫度在(zai)(zai)-40°C以(yi)下時(shi),無(wu)(wu)線通信(xin)設備需要每天工作8小(xiao)(xiao)時(shi)左右(you);當環(huan)境溫度為(wei)-20°C時(shi),每天工作8小(xiao)(xiao)時(shi)左右(you);當環(huan)境溫度為(wei)-30°C時(shi),每天工作4小(xiao)(xiao)時(shi)左右(you)。目前(qian)市場上常見的(de)無(wu)(wu)線對講(jiang)系統(tong)(tong)有兩(liang)種(zhong)(zhong)(zhong)電源(yuan)輸(shu)入(ru)方(fang)(fang)式(shi),一種(zhong)(zhong)(zhong)是電源(yuan)輸(shu)入(ru),另一種(zhong)(zhong)(zhong)是電源(yuan)輸(shu)出(chu)。從這兩(liang)種(zhong)(zhong)(zhong)方(fang)(fang)式(shi)對系統(tong)(tong)的(de)功(gong)耗(hao)來(lai)看,電源(yuan)輸(shu)入(ru)方(fang)(fang)式(shi)的(de)功(gong)耗(hao)更(geng)大一些,但是功(gong)耗(hao)很小(xiao)(xiao)。并且設備的(de)工作環(huan)境不(bu)(bu)(bu)同,對電池的(de)需求量(liang)也不(bu)(bu)(bu)同,所以(yi)功(gong)耗(hao)也不(bu)(bu)(bu)同。
3信號不受干擾
在一些(xie)有(you)(you)干(gan)(gan)擾(rao)(rao)(rao)的(de)(de)(de)(de)地方,例如野外、機場(chang)、工廠等(deng),一般采用(yong)分(fen)(fen)頻(pin)(pin)(pin)方式(shi)(shi)。分(fen)(fen)頻(pin)(pin)(pin)方式(shi)(shi)的(de)(de)(de)(de)抗干(gan)(gan)擾(rao)(rao)(rao)能(neng)力(li)(li)不強,其(qi)抗干(gan)(gan)擾(rao)(rao)(rao)能(neng)力(li)(li)主要(yao)取決于射(she)頻(pin)(pin)(pin)功率的(de)(de)(de)(de)大小。分(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu)的(de)(de)(de)(de)功率一般是50dB在50dB左右(you)時,其(qi)抗干(gan)(gan)擾(rao)(rao)(rao)能(neng)力(li)(li)強。但由于分(fen)(fen)頻(pin)(pin)(pin)的(de)(de)(de)(de)干(gan)(gan)擾(rao)(rao)(rao)與噪聲(主要(yao)是周(zhou)邊噪聲)具(ju)有(you)(you)很強的(de)(de)(de)(de)互通性,當(dang)分(fen)(fen)頻(pin)(pin)(pin)發(fa)射(she)的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)超過50dB時,其(qi)抗千擾(rao)(rao)(rao)能(neng)力(li)(li)就會減弱(ruo)。另外,在一些(xie)有(you)(you)噪音的(de)(de)(de)(de)環境中使(shi)用(yong)分(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu),會使(shi)分(fen)(fen)頻(pin)(pin)(pin)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)無法到達發(fa)射(she)端(duan)的(de)(de)(de)(de)接(jie)收機或(huo)者(zhe)造成發(fa)射(she)端(duan)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接(jie)收端(duan)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)(de)糟(zao)合(he)而造成分(fen)(fen)頻(pin)(pin)(pin)或(huo)干(gan)(gan)擾(rao)(rao)(rao)(例如在使(shi)用(yong)室外電話時) 。而采用(yong)分(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu)的(de)(de)(de)(de)無線(xian)對(dui)講系(xi)統(tong)由于發(fa)射(she)功率小,分(fen)(fen)頻(pin)(pin)(pin)后(hou)的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)比有(you)(you)線(xian)對(dui)講系(xi)統(tong)高很多(在實際使(shi)用(yong)中分(fen)(fen)頻(pin)(pin)(pin)設備一般可以將系(xi)統(tong)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)分(fen)(fen)頻(pin)(pin)(pin)到50dB以上),信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)不受干(gan)(gan)擾(rao)(rao)(rao)。如果采用(yong)分(fen)(fen)頻(pin)(pin)(pin)技(ji)術(shu),需要(yao)在較(jiao)大的(de)(de)(de)(de)回波(bo)功率下才能(neng)實現信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)的(de)(de)(de)(de)分(fen)(fen)頻(pin)(pin)(pin)工作(如分(fen)(fen)頻(pin)(pin)(pin)器發(fa)射(she)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)與接(jie)收信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)重(zhong)疊時產生的(de)(de)(de)(de)千擾(rao)(rao)(rao))和(he)發(fa)送信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)降(jiang)低(同頻(pin)(pin)(pin)帶內的(de)(de)(de)(de)兩只天(tian)線(xian)對(dui)同一信(xin)(xin)(xin)(xin)(xin)(xin)道傳輸(shu)的(de)(de)(de)(de)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)強度(du)基本一致(zhi));如果采用(yong)混響技(ji)術(shu),則可以實現對(dui)無線(xian)信(xin)(xin)(xin)(xin)(xin)(xin)號(hao)(hao)(hao)(hao)干(gan)(gan)擾(rao)(rao)(rao)的(de)(de)(de)(de)抑制或(huo)降(jiang)低。
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