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href="http://www.cdcfah.com/">首頁(yè)?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_txcp/">通信產(chǎn)品</a>?<a href="http://www.cdcfah.com/cp/second-txcp_csjhsb/">傳輸、交換設(shè)備</a>?<a href="http://www.cdcfah.com/cp/third-csjhsb_gdjlh/">光端機(jī)</a>?云南音頻光端機(jī)與光纖收發(fā)器區(qū)別光端機(jī) 煙臺(tái)市正維通信技術(shù)供應(yīng)</p><div id="3bpnd5j" class="leftbox clearfix"><h1>云南音頻光端機(jī)與光纖收發(fā)器區(qū)別光端機(jī) 煙臺(tái)市正維通信技術(shù)供應(yīng)</h1><div id="fz77pxf" class="proBig"><div id="zl95nl7" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469288076946112/8930383.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="bdrh7z7" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469288076946112/8930383.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="pxvd777" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>云南音頻光端機(jī)與光纖收發(fā)器區(qū)別,光端機(jī)</p><p><span>***更新：</span>2021-02-02 02:19:19</p><p><span id="click" >瀏覽次數(shù)：6次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="xbr7hfl" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">煙臺(tái)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(jī): </span>0535-3975176</p><p><span>地址: </span>中國(guó)(山東)自由貿(mào)易試驗(yàn)區(qū)煙臺(tái)片區(qū)煙臺(tái)開發(fā)區(qū)珠江路42號(hào)</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="jj75dlh" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="7x9pvb9" class="box"><p><p style="text-indent:25px">光端光端機(jī)分3類：PDH，SPDH，SDH，云南音頻光端機(jī)與光纖收發(fā)器區(qū)別。　　PDH（Plesiochronous Digital Hierarchy，準(zhǔn)同步數(shù)字系列）光端機(jī)是小容量光端機(jī)，一般是成對(duì)應(yīng)用，也叫點(diǎn)到點(diǎn)應(yīng)用，容量一般為4E1，8E1，16E1。　　SDH（Synchronous Digital Hierarchy，同步數(shù)字系列）光端機(jī)容量較大，一般是16E1到4032E1，云南音頻光端機(jī)與光纖收發(fā)器區(qū)別。　　SPDH（Synchronous Plesiochronous Digital Hierarchy）光端機(jī)，介于PDH和SDH之間。SPDH是帶有SDH（同步數(shù)字系列）特點(diǎn)的PDH傳輸體制（基于PDH的碼速調(diào)整原理，云南音頻光端機(jī)與光纖收發(fā)器區(qū)別，同時(shí)又盡可能采用SDH中一部分組網(wǎng)技術(shù)）。機(jī)分3類：PDH，SPDH，SDH。數(shù)字光端機(jī)支持視頻無(wú)損再生中繼，因此可以采用多級(jí)傳輸模式。云南音頻光端機(jī)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="云南音頻光端機(jī)與光纖收發(fā)器區(qū)別,光端機(jī)" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469288076946112/8930383.png"></div><p style="text-indent:25px">關(guān)于模擬光端機(jī)與數(shù)字光端機(jī)的區(qū)別，可以先了解下數(shù)字信號(hào)和模擬信號(hào)的區(qū)別，從而容易了解模擬光端機(jī)與數(shù)字光端機(jī)的區(qū)別了！模擬信號(hào)傳輸輸入和輸出處理方式不一樣無(wú)論模擬、數(shù)字光端機(jī)，對(duì)輸入的基帶的視頻、音頻、數(shù)據(jù)信號(hào)都必須進(jìn)行處理。對(duì)于模擬調(diào)幅光端機(jī) 視頻、音頻、數(shù)據(jù)的幅度對(duì)一高頻載波信號(hào)進(jìn)行調(diào)制，使高頻載波信號(hào)的幅度隨視頻、音頻、數(shù)據(jù)的幅度變化而光端機(jī)對(duì)輸入的基帶的視頻、音頻、數(shù)據(jù)進(jìn)行高分辨率的模擬-數(shù)字轉(zhuǎn)換，如1Vp-p幅度范圍的幅度信號(hào)利用號(hào)來(lái)表示，1V等分成4096，因此模數(shù)轉(zhuǎn)換后引起的最大電壓幅度誤差為1/4096V(約2.5mV),此誤差電壓稱各種幅度的電壓數(shù)值從0V、1/4096V、2/4096V...數(shù)字編碼信號(hào)直接控制光頭發(fā)射的光信號(hào)的強(qiáng)、弱兩種狀態(tài)(對(duì)應(yīng)0或再將數(shù)字編碼進(jìn)行數(shù)字-模擬轉(zhuǎn)換，恢復(fù)成原始的基帶的視頻、音頻、數(shù)據(jù)信號(hào)。云南音頻光端機(jī)與光纖收發(fā)器區(qū)別光端機(jī)的信號(hào)地應(yīng)與機(jī)殼地、大地相連，為積累的靜電荷提供泄放回路，防止靜電荷積累，損壞設(shè)備。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="云南音頻光端機(jī)與光纖收發(fā)器區(qū)別,光端機(jī)" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287379936019/9767986.png"></div><p style="text-indent:25px">現(xiàn)以大家熟悉的平安城市報(bào)警與監(jiān)控系統(tǒng)為例，如果采用傳統(tǒng)光端機(jī)的系統(tǒng)想要做整個(gè)項(xiàng)目是相對(duì)繁瑣的，耗費(fèi)大、耗時(shí)長(zhǎng)、重復(fù)投資等等都是問(wèn)題，若采用復(fù)合業(yè)務(wù)視頻光傳輸系統(tǒng)，可以從較低層的道路監(jiān)控將圖像逐層匯聚傳輸，并且各種控制信號(hào)、報(bào)警聯(lián)動(dòng)信號(hào)、語(yǔ)音、電話、高速以太網(wǎng)等數(shù)據(jù)業(yè)務(wù)實(shí)現(xiàn)綜合傳輸。由于設(shè)備均由標(biāo)準(zhǔn)模塊搭建而成，在實(shí)際改造過(guò)程種并不需要更換或添加任何模塊。模塊化的使用和配置使光端機(jī)具有很強(qiáng)的靈活性。它摒棄了光端機(jī)從誕生至今十來(lái)年的傳統(tǒng)結(jié)構(gòu)，是光端機(jī)從模擬到數(shù)字之后又一個(gè)質(zhì)的飛躍，是視頻傳輸領(lǐng)域向以數(shù)據(jù)為主要業(yè)務(wù)的傳統(tǒng)通信領(lǐng)域靠攏的標(biāo)志。 </p><p style="text-indent:25px">光端機(jī)，就是光信號(hào)傳輸?shù)慕K端設(shè)備。由于目前技術(shù)的提高，光纖價(jià)格的降低使它在各個(gè)領(lǐng)域得到很好的應(yīng)用(主要體現(xiàn)在安防監(jiān)控)，因此各個(gè)光端機(jī)的廠家就好比是雨后春筍般發(fā)展起來(lái)。視頻光端機(jī)在中國(guó)的發(fā)展是伴隨著監(jiān)控發(fā)展開始的，視頻光端機(jī)就是把1到多路的模擬視頻信號(hào)通過(guò)各種編碼轉(zhuǎn)換成光信號(hào)通過(guò)光纖介質(zhì)來(lái)傳輸?shù)脑O(shè)備，又分為模擬光端機(jī)和數(shù)字光端機(jī)。由于數(shù)字技術(shù)與傳統(tǒng)的模擬技術(shù)相比在很多方面都具有明顯的優(yōu)勢(shì)，所以正如數(shù)字技術(shù)在許多領(lǐng)域取代了模擬技術(shù)一樣，光端機(jī)的數(shù)字化也是一種必然趨勢(shì)。數(shù)字視頻光端機(jī)主要有兩種技術(shù)方式:一種是MPEG II圖象壓縮數(shù)字光端機(jī)，另一種是全數(shù)字非壓縮視頻光端機(jī)。數(shù)字光端機(jī)在遠(yuǎn)程教育、遠(yuǎn)程醫(yī)療、項(xiàng)目協(xié)同工作、行政會(huì)議、安防工程方面都有應(yīng)用。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="云南音頻光端機(jī)與光纖收發(fā)器區(qū)別,光端機(jī)" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287850514481/8615403.png"></div><p style="text-indent:25px">SDH光端機(jī) SDH(SynchronousDigitalHierarchy，同步數(shù)字系列)光端機(jī)容量較大，一般是16E1到4032E1。 SDH設(shè)備是一種將復(fù)接、線路傳輸及交換功能融為一體、并由統(tǒng)一網(wǎng)管系統(tǒng)操作的綜合信息傳送網(wǎng)絡(luò) 。而隨著數(shù)字通信的迅速發(fā)展，點(diǎn)到點(diǎn)的直接傳輸越來(lái)越少，而大部分?jǐn)?shù)字傳輸都要經(jīng)過(guò)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。 SPDH光端機(jī) SPDH(SynchronousPlesiochronousDigitalHierarchy)光端機(jī)，介于PDH和SDH之間。SPDH是帶有SDH(同步數(shù)字系列)特點(diǎn)的PDH傳輸體制(基于PDH的碼速調(diào)整原理，同時(shí)又盡可能采用SDH中一部分組網(wǎng)技術(shù))。光端機(jī)從接口分類又為視頻光端機(jī)，音頻光端機(jī)，數(shù)據(jù)光端機(jī)，以太網(wǎng)光端機(jī)，開關(guān)量光端機(jī)，電話光端機(jī)。光纖的模擬傳輸系統(tǒng)是把光強(qiáng)進(jìn)行模擬調(diào)制，其光源的調(diào)制功率隨調(diào)制信號(hào)的幅度變化而變化。云南音頻光端機(jī)與光纖收發(fā)器區(qū)別</p><p style="text-indent:25px">數(shù)字光端機(jī)傳輸距離較長(zhǎng):可達(dá)80Km，甚至更遠(yuǎn)(120Km)。云南音頻光端機(jī)與光纖收發(fā)器區(qū)別</p><p style="text-indent:25px">模擬光端機(jī)與數(shù)字光端機(jī)處理方式的不同，引起的視頻、音頻、數(shù)據(jù)信號(hào)信號(hào)失真、變畸變、干擾不同。模擬光端機(jī)由于要進(jìn)行調(diào)幅、調(diào)頻、調(diào)相，所以模擬信號(hào)的幅度的變化與載波信號(hào)因調(diào)制而引起的幅度變化是否為一一對(duì)應(yīng)的線形關(guān)系成為擬光端機(jī)質(zhì)量好壞的關(guān)鍵，到目前為止，很難做到真正線性調(diào)制，非線形必同時(shí)調(diào)制好的載波信號(hào)還要調(diào)制光信號(hào)，光信號(hào)的非線性也是一個(gè)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(shí)需進(jìn)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(hào)在光纖中長(zhǎng)距離傳輸，會(huì)引起光信號(hào)的功率衰減，傳輸頻率漂移信號(hào)色散效應(yīng)同樣也會(huì)引起光信號(hào)畸變；光信號(hào)到達(dá)接收端，接收光器件仍然要引起非線性失真，由光電轉(zhuǎn)換后解調(diào)，解調(diào)與調(diào)制一樣會(huì)產(chǎn)生非線性畸變。所以綜合模擬光端機(jī)，從輸入信號(hào)調(diào)制-電光轉(zhuǎn)換-光輸出-光電轉(zhuǎn)換-都會(huì)引起非線形失真，而這些信號(hào)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(jī)傳輸視頻圖象據(jù)的效果很難達(dá)到很滿意的效果。數(shù)字式光端機(jī)只是只有模數(shù)轉(zhuǎn)換的量化誤差(如1V視頻信號(hào)12bits時(shí)只是為2起信號(hào)畸變。云南音頻光端機(jī)與光纖收發(fā)器區(qū)別</p><p style="text-indent:25px">煙臺(tái)市正維通信技術(shù)有限公司一直專注于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(guò)覆蓋國(guó)內(nèi)30個(gè)省、市、自治區(qū)的銷售機(jī)構(gòu)和數(shù)十個(gè)重要的合作伙伴，使迅速響應(yīng)用戶需求成為現(xiàn)實(shí)，向客戶提供完善的售前支持和貼心的售后服務(wù)。，是一家通信產(chǎn)品的企業(yè)，擁有自己**的技術(shù)體系。一批專業(yè)的技術(shù)團(tuán)隊(duì)，是實(shí)現(xiàn)企業(yè)戰(zhàn)略目標(biāo)的基礎(chǔ)，是企業(yè)持續(xù)發(fā)展的動(dòng)力。公司業(yè)務(wù)范圍主要包括：工業(yè)交換機(jī)，以太網(wǎng)交換機(jī)，環(huán)網(wǎng)交換機(jī)，光纖收發(fā)器等。公司奉行顧客至上、質(zhì)量為本的經(jīng)營(yíng)宗旨，深受客戶好評(píng)。公司深耕工業(yè)交換機(jī)，以太網(wǎng)交換機(jī)，環(huán)網(wǎng)交換機(jī)，光纖收發(fā)器，正積蓄著更大的能量，向更廣闊的空間、更寬泛的領(lǐng)域拓展。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3117313.html</p></div></div></div></div></div><div id="bj75l9h" class="page-right twoColRt"><div id="9xnbhfv" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="hhfd9th" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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