河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別工業(yè)交換機煙臺市正維通信技術供應-b2b網(wǎng)站_b2b電子商務平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="光端光端機分3類：PDH，SPDH，SDH?！　DH（PlesiochronousDigitalHierarchy，準同步數(shù)字系列）光端機是小容量光端機，一般是成對應用，也叫點到點應用，容量一般為4E1，8E1，16E1?！　DH（Sy"><meta name="keywords" content="河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別,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 http-equiv="Cache-Control" 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href="http://www.cdcfah.com/cp/third-csjhsb_gdjlh/">光端機</a>?河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別工業(yè)交換機煙臺市正維通信技術供應</p><div id="qqbv97h" class="leftbox clearfix"><h1>河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別工業(yè)交換機煙臺市正維通信技術供應</h1><div id="eqqzznb" class="proBig"><div id="vuj9aom" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287695276175/6086715.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="gllgx76" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287695276175/6086715.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="xcc4hgz" 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)品關鍵詞：</span>河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別,光端機</p><p><span>***更新：</span>2021-01-25 06:19:29</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="tzkxhv2" 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="wxr2ajq" class="page-proshow02"><p class="title">詳細說明</p><div id="bh8ruzo" class="box"><p><p style="text-indent:25px">光端光端機分3類：PDH，SPDH，SDH。　　PDH（Plesiochronous Digital Hierarchy，準同步數(shù)字系列）光端機是小容量光端機，一般是成對應用，也叫點到點應用，容量一般為4E1，8E1，16E1。　　SDH（Synchronous Digital Hierarchy，同步數(shù)字系列）光端機容量較大，河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別，一般是16E1到4032E1。　　SPDH（Synchronous Plesiochronous Digital Hierarchy）光端機，介于PDH和SDH之間。SPDH是帶有SDH（同步數(shù)字系列）特點的PDH傳輸體制（基于PDH的碼速調整原理，河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別，同時又盡可能采用SDH中一部分組網(wǎng)技術）。機分3類：PDH，SPDH，河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別，SDH。數(shù)字光端機是一種通過數(shù)字電路控制光信號，使用類似于0、1代碼來實現(xiàn)光通信的機器。應用于光纖通信等領域。河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別,光端機" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287695276175/6086715.png"></div><p style="text-indent:25px">關于模擬光端機與數(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，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失真 ? 在現(xiàn)場監(jiān)控應用中，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。對調頻、調幅、調相光端機來講，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頻、調幅、調相在某一載波上必然會引起各種鏡像、交調干擾。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用并且不會出現(xiàn)相互干擾。廣東以太網(wǎng)光端機生產(chǎn)廠家光端機的價格由于應用領域、產(chǎn)品質量、品牌、服務的區(qū)別，差異較大。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別,光端機" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469288702782803/3120597.png"></div><p style="text-indent:25px">光端機在廣電傳輸中的多種應用隨著大通信時代的不斷發(fā)展，廣播電視從模擬向數(shù)字的過渡，數(shù)字化帶給大眾的感受是節(jié)目質量提高、節(jié)目更加豐富多彩?，F(xiàn)在，人們對電視節(jié)目的需求日益提高，不只是收到電視信號就可以了，還要求完美的畫面和逼真的聲音。這個時候光端機就在這里發(fā)揮重大作用了！因此，先進的拍攝數(shù)字化設備固然重要，但是傳輸設備對信號起著重大重要，也就是不解決傳輸設備對信號滯后的這個問題，那么問題就嚴重了，所以光端機用途的起著非常重要作用總得來說，市級電視臺采用模擬設備進行傳輸，由于元器件的老化而使設備的不穩(wěn)定因素明顯增加，經(jīng)常造成傳輸中斷，嚴重影響信號的正常傳輸及質量。所以，在充分考慮設備先進性、兼容性、整體配套性的基礎上，信號傳輸系統(tǒng)采取以數(shù)字設備為主，將具有使用模擬設備所無法比擬的優(yōu)勢。</p><p style="text-indent:25px">光端機，就是光信號傳輸?shù)慕K端設備。由于目前技術的提高，光纖價格的降低使它在各個領域得到很好的應用(主要體現(xiàn)在安防監(jiān)控)，因此各個光端機的廠家就好比是雨后春筍般發(fā)展起來。視頻光端機在中國的發(fā)展是伴隨著監(jiān)控發(fā)展開始的，視頻光端機就是把1到多路的模擬視頻信號通過各種編碼轉換成光信號通過光纖介質來傳輸?shù)脑O備，又分為模擬光端機和數(shù)字光端機。由于數(shù)字技術與傳統(tǒng)的模擬技術相比在很多方面都具有明顯的優(yōu)勢，所以正如數(shù)字技術在許多領域取代了模擬技術一樣，光端機的數(shù)字化也是一種必然趨勢。數(shù)字視頻光端機主要有兩種技術方式:一種是MPEG II圖象壓縮數(shù)字光端機，另一種是全數(shù)字非壓縮視頻光端機。數(shù)字光端機在遠程教育、遠程醫(yī)療、項目協(xié)同工作、行政會議、安防工程方面都有應用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別,光端機" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469288899057030/8487397.png"></div><p style="text-indent:25px">模擬光端機與數(shù)字光端機處理方式的不同，引起的視頻、音頻、數(shù)據(jù)信號信號失真、變畸變、干擾不同。模擬光端機由于要進行調幅、調頻、調相，所以模擬信號的幅度的變化與載波信號因調制而引起的幅度變化是否為一一對應的線形關系成為擬光端機質量好壞的關鍵，到目前為止，很難做到真正線性調制，非線形必同時調制好的載波信號還要調制光信號，光信號的非線性也是一個非常重要的因素，眾所周知，光器件的非線性工作電壓的穩(wěn)定性、光發(fā)射功率有很大的影響，因此光器件在生產(chǎn)時需進行7-10天的熱循環(huán)老化等等工藝選只能做到將這種變換控制在一定的范圍；光信號在光纖中長距離傳輸，會引起光信號的功率衰減，傳輸頻率漂移信號色散效應同樣也會引起光信號畸變；光信號到達接收端，接收光器件仍然要引起非線性失真，由光電轉換后解調，解調與調制一樣會產(chǎn)生非線性畸變。所以綜合模擬光端機，從輸入信號調制-電光轉換-光輸出-光電轉換-都會引起非線形失真，而這些信號畸變失真是固有的，所以也必然是不可消除的，因此模擬光端機傳輸視頻圖象據(jù)的效果很難達到很滿意的效果。數(shù)字式光端機只是只有模數(shù)轉換的量化誤差(如1V視頻信號12bits時只是為2起信號畸變。光纖網(wǎng)絡拓撲方式，光纖網(wǎng)絡拓撲方式?jīng)Q定了視頻光端機類型。福建PDH光端機報價</p><p style="text-indent:25px">已有光端機生產(chǎn)廠商能夠做到在一個波長通道上一次傳輸10路非壓縮實時視頻圖像。河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別</p><p style="text-indent:25px">數(shù)字光端機是將所要傳輸?shù)膱D像、語音以及數(shù)據(jù)信號進行數(shù)字化處理，再將這些數(shù)字信號進行復用處理，使多路低速的數(shù)字信號轉換成一路高速信號，并將這一信號轉換成光信號。在接收端將光信號還原成電信號，還原的高速信號分解出原來的多路低速信號，較后再將這些數(shù)據(jù)信號還原成圖像、語音以及數(shù)據(jù)信號。模擬光端機就是將要傳輸?shù)男盘栠M行幅度或頻率調制然后將調制好的電信號轉化成光信號。在接收端將光信號還原成電信號，再把信號進行解調，還原出圖像、語音或數(shù)據(jù)信號。數(shù)字光端機傳輸信號質量高，沒有模擬調頻、調相、調幅光端機多路信號同傳時的交調干擾嚴重、容易受環(huán)境影響、傳輸質量低劣、長期工作穩(wěn)定性差的缺點，因此，數(shù)字光端機將逐漸取代模擬光端機。河南環(huán)網(wǎng)光端機與光纖收發(fā)器區(qū)別</p><p style="text-indent:25px">煙臺市正維通信技術有限公司總部位于中國(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，是一家目前正維通信的用戶已遍布電力、煤礦、軌道交通、高速公路、鋼鐵冶金、石油化工、城市智能交通、水處理等行業(yè)，正維通信通過覆蓋國內30個省、市、自治區(qū)的銷售機構和數(shù)十個重要的合作伙伴，使迅速響應用戶需求成為現(xiàn)實，向客戶提供完善的售前支持和貼心的售后服務。的公司。公司自創(chuàng)立以來，投身于工業(yè)交換機，以太網(wǎng)交換機，環(huán)網(wǎng)交換機，光纖收發(fā)器，是通信產(chǎn)品的主力軍。煙臺正維通信技術始終以本分踏實的精神和必勝的信念，影響并帶動團隊取得成功。煙臺正維通信技術始終關注通信產(chǎn)品市場，以敏銳的市場洞察力，實現(xiàn)與客戶的成長共贏。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3001622.html</p></div></div></div></div></div><div id="qj7t8fj" 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