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雞西無線對講系統有什么優點?
由于在(zai)(zai)戶外(wai)、室內(nei)等(deng)(deng)區(qu)域,無(wu)線(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)的(de)(de)信(xin)號強度較(jiao)弱,而且采用(yong)(yong)頻率調制技術(如 MHZ、 NMR、 BSI等(deng)(deng))產生的(de)(de)信(xin)號傳輸時延大(da),傳輸距(ju)離遠。因(yin)此(ci)有(you)線(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)不適合(he)在(zai)(zai)戶外(wai)環(huan)(huan)境使用(yong)(yong),特別是在(zai)(zai)冬天及低風(feng)速季節(jie)使用(yong)(yong)。雖然無(wu)線(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)也有(you)著不錯的(de)(de)效果。但由于系(xi)(xi)統(tong)工作時會有(you)一(yi)定的(de)(de)干擾(rao),使對(dui)(dui)(dui)講(jiang)效果下降,另(ling)外(wai)在(zai)(zai)信(xin)號較(jiao)弱時對(dui)(dui)(dui)用(yong)(yong)戶語音產生了(le)影響。特別是在(zai)(zai)人員(yuan)復雜、通(tong)(tong)信(xin)距(ju)離較(jiao)短或需(xu)(xu)(xu)要(yao)較(jiao)長時間使用(yong)(yong)時。因(yin)此(ci),更(geng)需(xu)(xu)(xu)要(yao)有(you)一(yi)個可靠(kao)的(de)(de)無(wu)線(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)提供與有(you)線(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)一(yi)樣(yang)的(de)(de)語音信(xin)息(xi)與控制。無(wu)線(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)具有(you)很高(gao)的(de)(de)靈活性,它(ta)(ta)能夠滿足現場中所有(you)環(huan)(huan)境使用(yong)(yong)需(xu)(xu)(xu)求(qiu)并能隨(sui)時切換(huan)(如在(zai)(zai)野外(wai)、戶外(wai)電話等(deng)(deng)),用(yong)(yong)戶可以在(zai)(zai)任何地點使用(yong)(yong)、隨(sui)時、隨(sui)地進行通(tong)(tong)訊。使用(yong)(yong)方便、節(jie)省成本(ben)、節(jie)約(yue)費用(yong)(yong)。下面我(wo)們來(lai)了(le)解一(yi)下無(wu)線(xian)(xian)(xian)對(dui)(dui)(dui)講(jiang)系(xi)(xi)統(tong)它(ta)(ta)主要(yao)是什么優點?
1.性能穩定(ding),可靠(kao)性高
在(zai)相同無(wu)(wu)線(xian)傳輸距離(li)下(xia),無(wu)(wu)線(xian)傳輸信(xin)(xin)號更(geng)穩定由于使用了功率(lv)放大器來(lai)對(dui)無(wu)(wu)線(xian)信(xin)(xin)號進行壓縮(suo)和(he)(he)放大,使無(wu)(wu)線(xian)信(xin)(xin)號更(geng)加穩定可靠。無(wu)(wu)線(xian)信(xin)(xin)號在(zai)弱電磁環境下(xia)也(ye)能(neng)(neng)保(bao)持較好的性能(neng)(neng)。無(wu)(wu)線(xian)對(dui)講(jiang)系統(tong)具有(you)(you)發(fa)(fa)射(she)功率(lv)小、抗(kang)千(qian)(qian)(qian)擾(rao)(rao)能(neng)(neng)力(li)強(qiang)(與(yu)有(you)(you)線(xian)對(dui)講(jiang)系統(tong)比較)和(he)(he)抗(kang)電磁干(gan)(gan)擾(rao)(rao)能(neng)(neng)力(li)強(qiang)(與(yu)有(you)(you)線(xian)對(dui)講(jiang)系統(tong)比較)的特點(dian)。無(wu)(wu)線(xian)對(dui)講(jiang)系統(tong)發(fa)(fa)射(she)信(xin)(xin)號在(zai)發(fa)(fa)射(she)前(qian)和(he)(he)發(fa)(fa)射(she)后均能(neng)(neng)保(bao)持良好的性能(neng)(neng),使用過程中(zhong),發(fa)(fa)射(she)信(xin)(xin)號與(yu)接(jie)收信(xin)(xin)號完全不受(shou)任何千(qian)(qian)(qian)擾(rao)(rao),可保(bao)持很好的穩定性,具有(you)(you)良好的抗(kang)千(qian)(qian)(qian)擾(rao)(rao)性和(he)(he)抗(kang)低頻(pin)干(gan)(gan)擾(rao)(rao)能(neng)(neng)力(li),即使在(zai)惡劣的環境下(xia)也(ye)能(neng)(neng)保(bao)持較好的性能(neng)(neng)。因此無(wu)(wu)線(xian)系統(tong)有(you)(you)較高的可靠性。
2.功耗小、不受天氣、濕(shi)度的影響(xiang)
無線(xian)對(dui)講系統(tong)在不同(tong)的(de)(de)(de)(de)環(huan)(huan)境(jing)中,無線(xian)通信(xin)設(she)(she)備和有(you)線(xian)通信(xin)設(she)(she)備一(yi)樣都(dou)要(yao)進行電(dian)(dian)能的(de)(de)(de)(de)消耗(hao)(hao)。當環(huan)(huan)境(jing)溫(wen)(wen)度(du)在-40°C以下時(shi)(shi),無線(xian)通信(xin)設(she)(she)備需要(yao)每天工(gong)作8小(xiao)時(shi)(shi)左(zuo)右;當環(huan)(huan)境(jing)溫(wen)(wen)度(du)為-20°C時(shi)(shi),每天工(gong)作8小(xiao)時(shi)(shi)左(zuo)右;當環(huan)(huan)境(jing)溫(wen)(wen)度(du)為-30°C時(shi)(shi),每天工(gong)作4小(xiao)時(shi)(shi)左(zuo)右。目前(qian)市場上常(chang)見的(de)(de)(de)(de)無線(xian)對(dui)講系統(tong)有(you)兩種電(dian)(dian)源(yuan)(yuan)輸(shu)入方(fang)式(shi),一(yi)種是(shi)(shi)電(dian)(dian)源(yuan)(yuan)輸(shu)入,另一(yi)種是(shi)(shi)電(dian)(dian)源(yuan)(yuan)輸(shu)出。從這兩種方(fang)式(shi)對(dui)系統(tong)的(de)(de)(de)(de)功耗(hao)(hao)來(lai)看,電(dian)(dian)源(yuan)(yuan)輸(shu)入方(fang)式(shi)的(de)(de)(de)(de)功耗(hao)(hao)更大一(yi)些,但是(shi)(shi)功耗(hao)(hao)很小(xiao)。并且設(she)(she)備的(de)(de)(de)(de)工(gong)作環(huan)(huan)境(jing)不同(tong),對(dui)電(dian)(dian)池的(de)(de)(de)(de)需求量也不同(tong),所以功耗(hao)(hao)也不同(tong)。
3信號不受干擾
在(zai)一(yi)些有(you)干(gan)(gan)擾(rao)(rao)的(de)地方(fang),例(li)如野外(wai)、機場、工(gong)廠等,一(yi)般(ban)采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)方(fang)式。分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)方(fang)式的(de)抗(kang)(kang)干(gan)(gan)擾(rao)(rao)能(neng)(neng)力(li)(li)不(bu)強,其(qi)抗(kang)(kang)干(gan)(gan)擾(rao)(rao)能(neng)(neng)力(li)(li)主要取決(jue)于射(she)(she)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)功(gong)率(lv)(lv)的(de)大小。分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)技(ji)(ji)術的(de)功(gong)率(lv)(lv)一(yi)般(ban)是50dB在(zai)50dB左右時(shi)(shi)(shi),其(qi)抗(kang)(kang)干(gan)(gan)擾(rao)(rao)能(neng)(neng)力(li)(li)強。但由于分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)的(de)干(gan)(gan)擾(rao)(rao)與(yu)(yu)噪聲(主要是周邊噪聲)具有(you)很強的(de)互通性,當分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)發射(she)(she)的(de)信(xin)號(hao)(hao)超過(guo)50dB時(shi)(shi)(shi),其(qi)抗(kang)(kang)千擾(rao)(rao)能(neng)(neng)力(li)(li)就會(hui)減弱。另(ling)外(wai),在(zai)一(yi)些有(you)噪音的(de)環境中(zhong)(zhong)使(shi)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)技(ji)(ji)術,會(hui)使(shi)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)信(xin)號(hao)(hao)無法到(dao)達發射(she)(she)端(duan)(duan)的(de)接收(shou)(shou)機或者造(zao)成(cheng)發射(she)(she)端(duan)(duan)信(xin)號(hao)(hao)與(yu)(yu)接收(shou)(shou)端(duan)(duan)信(xin)號(hao)(hao)的(de)糟合(he)而(er)造(zao)成(cheng)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)或干(gan)(gan)擾(rao)(rao)(例(li)如在(zai)使(shi)用(yong)(yong)室(shi)外(wai)電話時(shi)(shi)(shi)) 。而(er)采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)技(ji)(ji)術的(de)無線(xian)(xian)對(dui)(dui)講(jiang)(jiang)系統(tong)由于發射(she)(she)功(gong)率(lv)(lv)小,分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)后的(de)信(xin)號(hao)(hao)強度比有(you)線(xian)(xian)對(dui)(dui)講(jiang)(jiang)系統(tong)高很多(在(zai)實(shi)際使(shi)用(yong)(yong)中(zhong)(zhong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)設備一(yi)般(ban)可(ke)以將系統(tong)信(xin)號(hao)(hao)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)到(dao)50dB以上),信(xin)號(hao)(hao)不(bu)受干(gan)(gan)擾(rao)(rao)。如果(guo)(guo)采(cai)用(yong)(yong)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)技(ji)(ji)術,需要在(zai)較大的(de)回(hui)波功(gong)率(lv)(lv)下才(cai)能(neng)(neng)實(shi)現信(xin)號(hao)(hao)的(de)分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)工(gong)作(zuo)(如分(fen)(fen)(fen)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)器(qi)發射(she)(she)信(xin)號(hao)(hao)與(yu)(yu)接收(shou)(shou)信(xin)號(hao)(hao)重疊(die)時(shi)(shi)(shi)產生的(de)千擾(rao)(rao))和發送信(xin)號(hao)(hao)強度降(jiang)低(同(tong)(tong)頻(pin)(pin)(pin)(pin)(pin)(pin)(pin)帶內的(de)兩只天線(xian)(xian)對(dui)(dui)同(tong)(tong)一(yi)信(xin)道傳(chuan)輸(shu)的(de)信(xin)號(hao)(hao)強度基本(ben)一(yi)致(zhi));如果(guo)(guo)采(cai)用(yong)(yong)混(hun)響技(ji)(ji)術,則可(ke)以實(shi)現對(dui)(dui)無線(xian)(xian)信(xin)號(hao)(hao)干(gan)(gan)擾(rao)(rao)的(de)抑制或降(jiang)低。
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