青海視頻光端機的價格工業(yè)交換機煙臺市正維通信技術(shù)供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="關(guān)于模擬光端機與數(shù)字光端機的區(qū)別，可以先了解下數(shù)字信號和模擬信號的區(qū)別，青海視頻光端機的價格，從而容易了解模擬光端機與數(shù)字光端機的區(qū)別了！多路信號同傳引起的交調(diào)失真?在現(xiàn)場監(jiān)控應(yīng)用中，用戶可能有許多各種信號，如視頻圖像、音頻、數(shù)據(jù)、以太網(wǎng)、"><meta name="keywords" content="青海視頻光端機的價格,光端機"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta 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href="http://www.cdcfah.com/cp/third-csjhsb_gdjlh/">光端機</a>?青海視頻光端機的價格工業(yè)交換機煙臺市正維通信技術(shù)供應(yīng)</p><div id="7ueai83" class="leftbox clearfix"><h1>青海視頻光端機的價格工業(yè)交換機煙臺市正維通信技術(shù)供應(yīng)</h1><div id="hrst8oa" class="proBig"><div id="l8xthyc" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469288702782803/3120597.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="famypwn" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469288702782803/3120597.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="mk2gwnu" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>山東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>青海視頻光端機的價格,光端機</p><p><span>***更新：</span>2021-01-31 08:28:08</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="bzselwi" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">煙臺市正維通信技術(shù)有限公司</a></p><p><span>聯(lián)系人：</span>程雷</p><p><span>郵箱: </span>zhengwei@zhengwei-teah.cn</p><p><span>電話: </span>18766381696</p><p><span>傳真: </span>0535_</p><p><span>網(wǎng)址: </span>http://www.zwkj.net.cn</p><p><span>手機: </span>0535-3975176</p><p><span>地址: </span>中國(山東)自由貿(mào)易試驗區(qū)煙臺片區(qū)煙臺開發(fā)區(qū)珠江路42號</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="uizvmi8" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="t8vbsok" class="box"><p><p style="text-indent:25px">關(guān)于模擬光端機與數(shù)字光端機的區(qū)別，可以先了解下數(shù)字信號和模擬信號的區(qū)別，青海視頻光端機的價格，從而容易了解模擬光端機與數(shù)字光端機的區(qū)別了！多路信號同傳引起的交調(diào)失真 ? 在現(xiàn)場監(jiān)控應(yīng)用中，用戶可能有許多各種信號，如視頻圖像、音頻、數(shù)據(jù)、以太網(wǎng)、電話或其它用戶自種信號分別用一對光端機來傳輸，必然價格昂貴，所以為了提高光纖的利用效率，降低成本，必須的各種信號在以便在一對或一根光纖上傳輸。對調(diào)頻，青海視頻光端機的價格，青海視頻光端機的價格、調(diào)幅、調(diào)相光端機來講，傳輸10/100M以太網(wǎng)信號或多路電話等高速的，將多路視頻或音頻信號混合調(diào)頻、調(diào)幅、調(diào)相在某一載波上必然會引起各種鏡像、交調(diào)干擾。模擬光端機傳輸信號容量有限，一般不會超過4路信號端機傳輸?shù)氖菙?shù)字信號，很容易進行大容量復(fù)用并且不會出現(xiàn)相互干擾。數(shù)字光端機完全兼容NTSC, PAL,SECAM制式圖像。青海視頻光端機的價格</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海視頻光端機的價格,光端機" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469288702782803/3120597.png"></div><p style="text-indent:25px">用戶在使用光端機時還可能遇到?jīng)]有控制信號或者控制信號不正常，這個時候產(chǎn)品手冊就可以排上用場了，對照產(chǎn)品手冊數(shù)據(jù)端口定義檢查數(shù)據(jù)線是否連接正確且牢固可靠。特別是控制線的正負(fù)極有沒有接反。　　光端機，就是將多個E1（一種中繼線路的數(shù)據(jù)傳輸標(biāo)準(zhǔn)，通常速率為2.048Mbps，此標(biāo)準(zhǔn)為中國和歐洲采用）信號變成光信號并傳輸?shù)脑O(shè)備。光端機根據(jù)傳輸E1口數(shù)量的多少，價格也不同。一般較小的光端機可以傳輸4個E1，目前較大的光端機可以傳輸4032個E1。青海視頻光端機的價格光端機選購從發(fā)送到光纖上的信號來分，光端機可分為基于模擬技術(shù)的模擬光端機和基于數(shù)字技術(shù)的數(shù)字光端機。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海視頻光端機的價格,光端機" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287850514481/8615403.png"></div><p style="text-indent:25px">我國城市交通和高速公路建設(shè)的快速發(fā)展，對監(jiān)控系統(tǒng)中的設(shè)備要求也越來越高，由于光纖傳輸具有帶寬大、傳輸距離遠(yuǎn)、抗干擾的優(yōu)勢被廣應(yīng)用。光端機由于其諸多傳輸優(yōu)勢，加上這幾年的市場需求猛增，光纜成本大幅降低，已經(jīng)進入相對良性的產(chǎn)業(yè)發(fā)展軌道。。2006年前后開始的“平安城市”建設(shè)，光端機已經(jīng)幾乎成為標(biāo)準(zhǔn)配置，讓光端機廠商迎來“黃金時代”。目前，平安城市、城市智能交通、高速公路、城市軌道交通項目是光端機的主要市場。</p><p style="text-indent:25px">光端機在廣電傳輸中的多種應(yīng)用日常新聞傳送新聞中心技術(shù)系統(tǒng)應(yīng)采用全數(shù)字方案。視/音頻輸入信號由傳輸系統(tǒng)提供，轉(zhuǎn)播主信號全部為SDI信號(嵌入音頻)或視/音頻信號，經(jīng)解嵌或A/D轉(zhuǎn)換后，分配到錄像區(qū)、視/音頻分配矩陣和硬盤網(wǎng)絡(luò)系統(tǒng)。這些信號的切換和調(diào)度管理，由新聞中心的數(shù)字視頻矩陣和模擬矩陣負(fù)責(zé)，然后按照不同的要求，可以直接以SDI信號傳輸給發(fā)射臺或者經(jīng)MPEG-2壓縮編碼后分插到SDH環(huán)網(wǎng)傳輸?shù)绞∨_。微波傳輸微波站->制作中心->演播廳->發(fā)射臺，傳輸系統(tǒng)的設(shè)計和安裝直接影響到信號的傳輸質(zhì)量。目前傳輸系統(tǒng)設(shè)備大部分都是數(shù)字產(chǎn)品。微波站到制作中心之間的信號傳輸采用高寬帶視頻傳輸光端機。模擬視頻光端機與數(shù)字光端機價格不同。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海視頻光端機的價格,光端機" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469288413839434/2299527.png"></div><p style="text-indent:25px">4路視頻光端機在面對瞬間干擾時，需要很強的抵抗力才能有效的避免破壞。各個廠家根據(jù)設(shè)備的保護使用不同的措施，使4路視頻光端機具有更強的使用壽命。 (1)、4路視頻光端機瞬態(tài)干擾的危害:由于它干擾頻率高、持續(xù)時間短、干擾幅度大(成百上千伏)、它可以燒壞4路視頻光端機的RS-485接口芯片、主芯片等關(guān)鍵部位，卻不留痕跡，尤其是夏季雷雨季節(jié)，這種破壞力影響很大，使用戶、商家和廠家都十分傷腦筋。 (2)、4路視頻光端機瞬態(tài)干擾的產(chǎn)生:瞬態(tài)干擾產(chǎn)生于大型感性負(fù)載，如電機、變壓器、繼電器等設(shè)備的開關(guān)轉(zhuǎn)換，以及雷電的發(fā)生過程中，它往往以靜電感應(yīng)的方式入侵4路視頻光端機。 (3)、4路視頻光端機瞬態(tài)干擾的解決方法:盡管4路視頻光端機制造商采用了各種保護手段，如隔離法(光耦隔離)、旁路法(自恢復(fù)二極管)、吸收法(雙向避免二極管等)，這些基本可以有效的解決瞬態(tài)干擾造成的破壞。光耦隔離是指光耦隔離電路使被隔離的兩部分電路之間沒有電的直接連接，主要是防止因有電的連接而引起的干擾，特別是低壓的控制電路與外部高壓電路之間。數(shù)字光端機的視頻采用8位數(shù)字編碼。安徽網(wǎng)絡(luò)光端機批發(fā)廠家</p><p style="text-indent:25px">光端機的使用中要保持有一個通風(fēng)、散熱、防潮、整潔的工作環(huán)境。青海視頻光端機的價格</p><p style="text-indent:25px">數(shù)據(jù)光端機又叫光modem、E1光端機。在數(shù)字傳輸系統(tǒng)中，有兩種數(shù)字傳輸系列，一種叫"準(zhǔn)同步數(shù)字系列"(PlesiochronousDigitalHierarchy)，簡稱PDH;另一種叫"同步數(shù)字系列"(SynchronousDigitalHierarchy)，簡稱SDH。采用準(zhǔn)同步數(shù)字系列(PDH)的系統(tǒng)，是在數(shù)字通信網(wǎng)的每個節(jié)點上都分別設(shè)置高精度的時鐘，這些時鐘的信號都具有統(tǒng)一的標(biāo)準(zhǔn)速率。盡管每個時鐘的精度都很高，但總還是有一些微小的差別。為了保證通信的質(zhì)量，要求這些時鐘的差別不能超過規(guī)定的范圍。因此，這種同步方式嚴(yán)格來說不是真正的同步，所以叫做"準(zhǔn)同步"。在以往的電信網(wǎng)中，多使用PDH設(shè)備。這種系列對傳統(tǒng)的點到點通信有較好的適應(yīng)性。而隨著數(shù)字通信的迅速發(fā)展，點到點的直接傳輸越來越少，而大部分?jǐn)?shù)字傳輸都要經(jīng)過轉(zhuǎn)接，因而PDH系列便不能適合現(xiàn)代電信業(yè)務(wù)開發(fā)的需要，以及現(xiàn)代化電信網(wǎng)管理的需要。SDH就是適應(yīng)這種新的需要而出現(xiàn)的傳輸體系。青海視頻光端機的價格</p><p style="text-indent:25px">煙臺市正維通信技術(shù)有限公司位于中國(山東)自由貿(mào)易試驗區(qū)煙臺片區(qū)煙臺開發(fā)區(qū)珠江路42號，交通便利，環(huán)境優(yōu)美，是一家生產(chǎn)型企業(yè)。煙臺正維通信技術(shù)是一家有限責(zé)任公司企業(yè)，一直“以人為本，服務(wù)于社會”的經(jīng)營理念;“誠守信譽，持續(xù)發(fā)展”的質(zhì)量方針。公司業(yè)務(wù)涵蓋工業(yè)交換機，以太網(wǎng)交換機，環(huán)網(wǎng)交換機，光纖收發(fā)器，價格合理，品質(zhì)有保證，深受廣大客戶的歡迎。煙臺正維通信技術(shù)自成立以來，一直堅持走正規(guī)化、專業(yè)化路線，得到了廣大客戶及社會各界的普遍認(rèn)可與大力支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3094432.html</p></div></div></div></div></div><div id="e2tfw8z" class="page-right twoColRt"><div id="zy8i7y3" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="p7ipr8v" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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