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大理無線對講系統有什么優點?
由(you)于在(zai)戶(hu)(hu)(hu)外、室內(nei)等區域,無(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)的(de)(de)(de)(de)信號強度較弱,而(er)且采用(yong)頻率調(diao)制技術(如 MHZ、 NMR、 BSI等)產生的(de)(de)(de)(de)信號傳(chuan)輸時(shi)延大,傳(chuan)輸距離遠。因(yin)此有(you)(you)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)不(bu)適(shi)合(he)在(zai)戶(hu)(hu)(hu)外環境使(shi)(shi)用(yong),特(te)別(bie)是在(zai)冬天及低風(feng)速季節(jie)使(shi)(shi)用(yong)。雖然無(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)也有(you)(you)著不(bu)錯的(de)(de)(de)(de)效(xiao)(xiao)果(guo)。但由(you)于系(xi)(xi)統(tong)(tong)工(gong)作時(shi)會有(you)(you)一定(ding)的(de)(de)(de)(de)干(gan)擾,使(shi)(shi)對(dui)講(jiang)效(xiao)(xiao)果(guo)下(xia)降,另外在(zai)信號較弱時(shi)對(dui)用(yong)戶(hu)(hu)(hu)語(yu)音(yin)產生了(le)影響(xiang)。特(te)別(bie)是在(zai)人員復雜(za)、通(tong)(tong)信距離較短或(huo)需要較長時(shi)間使(shi)(shi)用(yong)時(shi)。因(yin)此,更需要有(you)(you)一個可靠的(de)(de)(de)(de)無(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)提供(gong)與有(you)(you)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)一樣的(de)(de)(de)(de)語(yu)音(yin)信息(xi)與控制。無(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)具有(you)(you)很高的(de)(de)(de)(de)靈(ling)活性(xing),它能夠滿足現(xian)場中(zhong)所有(you)(you)環境使(shi)(shi)用(yong)需求并(bing)能隨(sui)時(shi)切換(huan)(如在(zai)野外、戶(hu)(hu)(hu)外電話等),用(yong)戶(hu)(hu)(hu)可以在(zai)任(ren)何地點(dian)使(shi)(shi)用(yong)、隨(sui)時(shi)、隨(sui)地進行(xing)通(tong)(tong)訊(xun)。使(shi)(shi)用(yong)方便、節(jie)省(sheng)成本、節(jie)約費用(yong)。下(xia)面(mian)我們來了(le)解一下(xia)無(wu)線(xian)對(dui)講(jiang)系(xi)(xi)統(tong)(tong)它主要是什么優點(dian)?
1.性能(neng)穩定,可靠性高(gao)
在相同無(wu)線(xian)(xian)(xian)傳輸距離下(xia),無(wu)線(xian)(xian)(xian)傳輸信號(hao)更(geng)穩定由于使(shi)(shi)用(yong)了(le)功率(lv)放大器來對無(wu)線(xian)(xian)(xian)信號(hao)進行壓縮和(he)放大,使(shi)(shi)無(wu)線(xian)(xian)(xian)信號(hao)更(geng)加穩定可靠(kao)。無(wu)線(xian)(xian)(xian)信號(hao)在弱(ruo)電磁環(huan)境下(xia)也能(neng)(neng)保(bao)持(chi)較(jiao)(jiao)好(hao)(hao)(hao)的(de)(de)(de)性(xing)(xing)能(neng)(neng)。無(wu)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)具有(you)發射功率(lv)小、抗(kang)千擾能(neng)(neng)力強(qiang)(與(yu)有(you)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)比較(jiao)(jiao))和(he)抗(kang)電磁干(gan)擾能(neng)(neng)力強(qiang)(與(yu)有(you)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)比較(jiao)(jiao))的(de)(de)(de)特點。無(wu)線(xian)(xian)(xian)對講(jiang)系(xi)統(tong)(tong)發射信號(hao)在發射前和(he)發射后均能(neng)(neng)保(bao)持(chi)良好(hao)(hao)(hao)的(de)(de)(de)性(xing)(xing)能(neng)(neng),使(shi)(shi)用(yong)過程中,發射信號(hao)與(yu)接收(shou)信號(hao)完全(quan)不受(shou)任何千擾,可保(bao)持(chi)很好(hao)(hao)(hao)的(de)(de)(de)穩定性(xing)(xing),具有(you)良好(hao)(hao)(hao)的(de)(de)(de)抗(kang)千擾性(xing)(xing)和(he)抗(kang)低頻干(gan)擾能(neng)(neng)力,即使(shi)(shi)在惡劣的(de)(de)(de)環(huan)境下(xia)也能(neng)(neng)保(bao)持(chi)較(jiao)(jiao)好(hao)(hao)(hao)的(de)(de)(de)性(xing)(xing)能(neng)(neng)。因此無(wu)線(xian)(xian)(xian)系(xi)統(tong)(tong)有(you)較(jiao)(jiao)高的(de)(de)(de)可靠(kao)性(xing)(xing)。
2.功耗小、不受天氣、濕度的影響(xiang)
無線(xian)(xian)對(dui)講系統(tong)(tong)在不(bu)(bu)同(tong)的(de)環(huan)境中,無線(xian)(xian)通(tong)信設備和有線(xian)(xian)通(tong)信設備一樣都(dou)要進行電(dian)能的(de)消耗。當環(huan)境溫度(du)在-40°C以下時(shi)(shi),無線(xian)(xian)通(tong)信設備需(xu)要每天(tian)工(gong)作8小(xiao)時(shi)(shi)左(zuo)右(you);當環(huan)境溫度(du)為-20°C時(shi)(shi),每天(tian)工(gong)作8小(xiao)時(shi)(shi)左(zuo)右(you);當環(huan)境溫度(du)為-30°C時(shi)(shi),每天(tian)工(gong)作4小(xiao)時(shi)(shi)左(zuo)右(you)。目(mu)前市場上常見的(de)無線(xian)(xian)對(dui)講系統(tong)(tong)有兩(liang)種(zhong)電(dian)源輸(shu)入(ru)方(fang)式,一種(zhong)是(shi)(shi)電(dian)源輸(shu)入(ru),另一種(zhong)是(shi)(shi)電(dian)源輸(shu)出。從這兩(liang)種(zhong)方(fang)式對(dui)系統(tong)(tong)的(de)功(gong)耗來看(kan),電(dian)源輸(shu)入(ru)方(fang)式的(de)功(gong)耗更大一些,但是(shi)(shi)功(gong)耗很小(xiao)。并且設備的(de)工(gong)作環(huan)境不(bu)(bu)同(tong),對(dui)電(dian)池的(de)需(xu)求量也不(bu)(bu)同(tong),所以功(gong)耗也不(bu)(bu)同(tong)。
3信號不受干擾
在(zai)(zai)一(yi)些有(you)干(gan)(gan)擾(rao)的(de)(de)(de)地(di)方,例(li)如野外(wai)、機場、工廠等,一(yi)般采(cai)(cai)(cai)用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)方式(shi)。分(fen)(fen)(fen)(fen)頻(pin)(pin)方式(shi)的(de)(de)(de)抗(kang)干(gan)(gan)擾(rao)能力(li)(li)(li)不強,其抗(kang)干(gan)(gan)擾(rao)能力(li)(li)(li)主要(yao)取決于射頻(pin)(pin)功(gong)(gong)率(lv)的(de)(de)(de)大小(xiao)。分(fen)(fen)(fen)(fen)頻(pin)(pin)技術的(de)(de)(de)功(gong)(gong)率(lv)一(yi)般是(shi)50dB在(zai)(zai)50dB左右時,其抗(kang)干(gan)(gan)擾(rao)能力(li)(li)(li)強。但由(you)于分(fen)(fen)(fen)(fen)頻(pin)(pin)的(de)(de)(de)干(gan)(gan)擾(rao)與噪聲(sheng)(主要(yao)是(shi)周(zhou)邊(bian)噪聲(sheng))具有(you)很(hen)強的(de)(de)(de)互通(tong)性,當(dang)分(fen)(fen)(fen)(fen)頻(pin)(pin)發(fa)射的(de)(de)(de)信(xin)號(hao)超過(guo)50dB時,其抗(kang)千(qian)擾(rao)能力(li)(li)(li)就會(hui)(hui)減弱。另外(wai),在(zai)(zai)一(yi)些有(you)噪音的(de)(de)(de)環境中(zhong)使用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技術,會(hui)(hui)使分(fen)(fen)(fen)(fen)頻(pin)(pin)信(xin)號(hao)無(wu)(wu)法到(dao)達發(fa)射端(duan)的(de)(de)(de)接收(shou)機或者(zhe)造成(cheng)發(fa)射端(duan)信(xin)號(hao)與接收(shou)端(duan)信(xin)號(hao)的(de)(de)(de)糟合而造成(cheng)分(fen)(fen)(fen)(fen)頻(pin)(pin)或干(gan)(gan)擾(rao)(例(li)如在(zai)(zai)使用(yong)室外(wai)電話時) 。而采(cai)(cai)(cai)用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技術的(de)(de)(de)無(wu)(wu)線(xian)對講系統由(you)于發(fa)射功(gong)(gong)率(lv)小(xiao),分(fen)(fen)(fen)(fen)頻(pin)(pin)后的(de)(de)(de)信(xin)號(hao)強度比有(you)線(xian)對講系統高很(hen)多(在(zai)(zai)實際使用(yong)中(zhong)分(fen)(fen)(fen)(fen)頻(pin)(pin)設備一(yi)般可(ke)以(yi)將系統信(xin)號(hao)分(fen)(fen)(fen)(fen)頻(pin)(pin)到(dao)50dB以(yi)上),信(xin)號(hao)不受干(gan)(gan)擾(rao)。如果采(cai)(cai)(cai)用(yong)分(fen)(fen)(fen)(fen)頻(pin)(pin)技術,需要(yao)在(zai)(zai)較大的(de)(de)(de)回波功(gong)(gong)率(lv)下才能實現(xian)(xian)信(xin)號(hao)的(de)(de)(de)分(fen)(fen)(fen)(fen)頻(pin)(pin)工作(如分(fen)(fen)(fen)(fen)頻(pin)(pin)器發(fa)射信(xin)號(hao)與接收(shou)信(xin)號(hao)重疊時產生(sheng)的(de)(de)(de)千(qian)擾(rao))和發(fa)送信(xin)號(hao)強度降低(di)(同頻(pin)(pin)帶內(nei)的(de)(de)(de)兩只(zhi)天(tian)線(xian)對同一(yi)信(xin)道傳輸的(de)(de)(de)信(xin)號(hao)強度基本一(yi)致);如果采(cai)(cai)(cai)用(yong)混響技術,則可(ke)以(yi)實現(xian)(xian)對無(wu)(wu)線(xian)信(xin)號(hao)干(gan)(gan)擾(rao)的(de)(de)(de)抑制或降低(di)。
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