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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ldokvr9" 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>江蘇視頻光端機(jī)交換機(jī),光端機(jī)</p><p><span>***更新：</span>2021-01-26 04:21:15</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="pmip88v" 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="u8kvhy4" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="h7eax3q" class="box"><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，江蘇視頻光端機(jī)交換機(jī)、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，江蘇視頻光端機(jī)交換機(jī)，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，江蘇視頻光端機(jī)交換機(jī)。數(shù)字光端機(jī)傳輸距離較長(zhǎng):可達(dá)80Km，甚至更遠(yuǎn)(120Km)。江蘇視頻光端機(jī)交換機(jī)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇視頻光端機(jī)交換機(jī),光端機(jī)" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287996943972/1730711.png"></div><p style="text-indent:25px">模擬光端機(jī)與數(shù)字光端機(jī)的區(qū)別關(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！光纖上傳輸?shù)男盘?hào)方式不一樣顧名思義，模擬光端機(jī)上光頭發(fā)射的光信號(hào)是模擬光調(diào)制信號(hào)，它隨輸入的模擬載波信號(hào)的幅度、頻率光信號(hào)幅度、頻率、相位變化而分別稱為調(diào)幅、調(diào)頻、調(diào)相光端機(jī)。而數(shù)字光端機(jī)上光頭發(fā)射的光信號(hào)是數(shù)字應(yīng)光信號(hào)強(qiáng)、弱兩種狀態(tài)，不同的0和1組合表示不同幅度的視頻、音頻、數(shù)據(jù)信號(hào)。湖北高清光端機(jī)生產(chǎn)廠家光纖中只有"有光"和"無光"兩種狀態(tài)，對(duì)光源線性要求不高或幾乎沒有要求，避免了信號(hào)在處理過程中的損失。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇視頻光端機(jī)交換機(jī),光端機(jī)" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287695276175/6086715.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)。</p><p style="text-indent:25px">光端機(jī)和光纖收發(fā)器的應(yīng)用區(qū)別現(xiàn)在光纖網(wǎng)絡(luò)和安防監(jiān)控已經(jīng)是非常普及了，但是還是很多客戶會(huì)對(duì)光纖基礎(chǔ)設(shè)備的了解很缺乏。我們的客戶對(duì)光纖收發(fā)器和光端的區(qū)別會(huì)混淆了。對(duì)于光端機(jī)和光纖收發(fā)器的區(qū)別，他們的運(yùn)用區(qū)別，到底是如何區(qū)別？光纖收發(fā)器在網(wǎng)絡(luò)中的是一個(gè)信號(hào)轉(zhuǎn)換設(shè)備，光纖收發(fā)器的作用是，將我們要發(fā)送的電信號(hào)轉(zhuǎn)換成光信號(hào)，并發(fā)送出去，同時(shí)，能將接收到的光信號(hào)轉(zhuǎn)換成電信號(hào)，輸入到我們的接收端。光端機(jī)是一個(gè)延長(zhǎng)數(shù)據(jù)傳輸?shù)墓饫w通信設(shè)備，讓光傳輸可以達(dá)到遠(yuǎn)程傳輸?shù)哪康摹?shù)字光端機(jī)完全兼容NTSC, PAL,SECAM制式圖像。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江蘇視頻光端機(jī)交換機(jī),光端機(jī)" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287187050114/7075160.png"></div><p style="text-indent:25px">其中一部分技術(shù)在光端機(jī)市場(chǎng)還很小時(shí)就已比較成熟，開發(fā)新技術(shù)又需耗費(fèi)大量人力、物力，所以光端機(jī)生產(chǎn)廠家多以中小企業(yè)為主，各種品牌層出不窮，但質(zhì)量卻大相徑庭。視頻監(jiān)控中的光端機(jī)是光通信系統(tǒng)中的傳輸設(shè)備，主要是進(jìn)行光電轉(zhuǎn)換及傳輸功用。一般用于電信、電力、監(jiān)控、工業(yè)控制、視頻傳輸?shù)裙δ?，在各個(gè)行業(yè)有著廣的應(yīng)用。常說的光端機(jī)指的是用于監(jiān)控系統(tǒng)用來傳輸視頻、數(shù)據(jù)、以太網(wǎng)、音頻等綜合信息的光端機(jī)。主要分模擬光端機(jī)和數(shù)字光端機(jī)?；趥鬏?shù)慕橘|(zhì)的不同有單模光端機(jī)和多模光端機(jī)之分。數(shù)字光端機(jī)的數(shù)字非壓縮傳輸。江蘇視頻光端機(jī)交換機(jī)</p><p style="text-indent:25px">數(shù)字光端機(jī)支持的信號(hào)容量可達(dá)16路，甚至更多(32路、64路、128路)。江蘇視頻光端機(jī)交換機(jī)</p><p style="text-indent:25px">光端機(jī)的技術(shù)分類有哪些? 一般分分類吧：PDH光端、SDH光端機(jī)、SPDH光端機(jī)。讓我們老普及下吧！ PDH光端 PDH(PlesiochronousDigitalHierarchy，準(zhǔn)同步數(shù)字系列)光端機(jī)是以超大規(guī)模集成電路構(gòu)成的120路光電合一傳輸設(shè)備，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;適用于小容量交換機(jī)組網(wǎng)、用戶環(huán)路網(wǎng)，移動(dòng)通信(基站)、專網(wǎng)、DDN網(wǎng)等。其主要特點(diǎn)是：采用超大規(guī)模集成芯片，具有功耗低，可靠性高的特點(diǎn)。提供E1的遠(yuǎn)端環(huán)回測(cè)試功能，維護(hù)方便。120提供4個(gè)E1通道;具有完備的告警功能，可顯示本端和遠(yuǎn)端告警。告警信息(包括掉電告警)可通過網(wǎng)管通道上報(bào)到對(duì)端。采用收發(fā)一體光器件，工作性能穩(wěn)定可靠。整機(jī)單板設(shè)計(jì)體積小巧，使用方便。江蘇視頻光端機(jī)交換機(jī)</p><p style="text-indent:25px">煙臺(tái)市正維通信技術(shù)有限公司位于中國(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)。公司業(yè)務(wù)分為工業(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，目前不斷進(jìn)行創(chuàng)新和服務(wù)改進(jìn)，為客戶提供良好的產(chǎn)品和服務(wù)。公司從事通信產(chǎn)品多年，有著創(chuàng)新的設(shè)計(jì)、強(qiáng)大的技術(shù)，還有一批**的專業(yè)化的隊(duì)伍，確保為客戶提供良好的產(chǎn)品及服務(wù)。煙臺(tái)正維通信技術(shù)立足于全國(guó)市場(chǎng)，依托強(qiáng)大的研發(fā)實(shí)力，融合前沿的技術(shù)理念，飛快響應(yīng)客戶的變化需求。</p></p><br /><p>文章來源地址: 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