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class="container clearfix tcPro"><section class="home-main container clearfix"><div id="z2md7hw" class="twoCol"><div id="3y7tlda" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://m.cdcfah.com/">首頁(yè)?<a href="http://m.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://m.cdcfah.com/cp/first-_smdn/">數(shù)碼、電腦</a>?<a href="http://m.cdcfah.com/cp/second-smdn_sjpjgd/">手機(jī)配件</a>?<a href="http://m.cdcfah.com/cp/third-sjpjgd_lyspq/">藍(lán)牙適配器</a>?武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā) 深圳市小牛測(cè)控供應(yīng)</p><div id="dxjbdkw" class="leftbox clearfix"><h1>武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā) 深圳市小牛測(cè)控供應(yīng)</h1><div id="azwoasz" class="proBig"><div id="8hg7v8s" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637304059204335938/9819211.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="qkwoa7c" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637304059204335938/9819211.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="fumtvhj" 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>廣東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā),藍(lán)牙頻率校準(zhǔn)</p><p><span>***更新：</span>2020-12-09 02:09:39</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="tn8hur7" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">深圳市小牛測(cè)控技術(shù)有限公司</a></p><p><span>聯(lián)系人：</span>陳先生</p><p><span>郵箱: </span>403310010@qq.com</p><p><span>電話: </span>13420972963</p><p><span>傳真: </span>0755_</p><p><span>網(wǎng)址: </span>https://www.iodm.cn</p><p><span>手機(jī): </span>0755-21008225</p><p><span>地址: </span>深圳市龍華區(qū)東環(huán)二路69號(hào)慧華園廠房1棟411</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="3zlsugi" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="g8z7onz" class="box"><p><p style="text-indent:25px">藍(lán)牙技術(shù)系統(tǒng)構(gòu)成中的中間協(xié)議層主要包括了服務(wù)發(fā)現(xiàn)協(xié)議、邏輯鏈路控制和適應(yīng)協(xié)議、電話通信協(xié)議和串口仿真協(xié)議四個(gè)部分。服務(wù)發(fā)現(xiàn)協(xié)議層的作用是提供上層應(yīng)用程序一種機(jī)制以便于使用網(wǎng)絡(luò)中的服務(wù)。邏輯鏈路控制和適應(yīng)協(xié)議是負(fù)責(zé)數(shù)據(jù)拆裝、復(fù)用協(xié)議和控制服務(wù)質(zhì)量，是其他協(xié)議層作用實(shí)現(xiàn)的基礎(chǔ)。高層應(yīng)用。在藍(lán)牙技術(shù)構(gòu)成系統(tǒng)中，高層應(yīng)用是位于協(xié)議層上部的框架部分。藍(lán)牙技術(shù)的高層應(yīng)用主要有文件傳輸、網(wǎng)絡(luò)、局域網(wǎng)訪問(wèn)，武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā)，武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā)，武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā)。不同種類(lèi)的高層應(yīng)用是通過(guò)相應(yīng)的應(yīng)用程序通過(guò)一定的應(yīng)用模式實(shí)現(xiàn)的一種無(wú)線通信。輸出電平0dBm至-120dBm可調(diào)，分辯0.1db。武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā),藍(lán)牙頻率校準(zhǔn)" src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637304059204335938/9819211.png"></div><p style="text-indent:25px">藍(lán)牙射頻收發(fā)器：負(fù)責(zé)接收或發(fā)送高頻通信無(wú)線電波；收發(fā)器和串行接口：是藍(lán)牙模塊與主機(jī)控制器連接的兩種接口方式，可根據(jù)連接方式選擇；測(cè)試模塊：除具有測(cè)試功能外，還提供有關(guān)認(rèn)證和規(guī)范，為可選模塊。*藍(lán)牙數(shù)據(jù)傳輸和數(shù)據(jù)安全*藍(lán)牙模塊將數(shù)據(jù)分成短而靈活的數(shù)據(jù)包，在每個(gè)數(shù)據(jù)包發(fā)送完成后，會(huì)以改變發(fā)送和接收的頻率，稱為跳頻技術(shù)（AFH）。藍(lán)牙技術(shù)系統(tǒng)中的底層硬件模塊由基帶、跳頻和鏈路管理。其中，基帶是完成藍(lán)牙數(shù)據(jù)和跳頻的傳輸。合肥全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā)藍(lán)牙4.0使用2 MHz 間距，可容納40個(gè)頻道。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā),藍(lán)牙頻率校準(zhǔn)" src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637304059611699219/6753670.png"></div><p style="text-indent:25px">將藍(lán)牙信道與藍(lán)牙模塊發(fā)射功率的關(guān)系建立數(shù)學(xué)模型，通過(guò)數(shù)學(xué)計(jì)算結(jié)果控制發(fā)射功率校準(zhǔn)過(guò)程。根據(jù)一定的硬件環(huán)境配置，在藍(lán)牙信道選取合適的動(dòng)態(tài)分組數(shù)目進(jìn)行分組并確定分隔這些分組的信道序號(hào)，計(jì)算這些分隔信道上的發(fā)射功率和誤差。通過(guò)序號(hào)相鄰的兩個(gè)分隔信道的發(fā)射功率計(jì)算出一條線段，根據(jù)這條線段擬合分隔信道之間的信道的發(fā)射功率，然后計(jì)算每條信道上的誤差并校準(zhǔn)。這樣使得本實(shí)施例與現(xiàn)有技術(shù)固定分組算法相比，可在不提高校準(zhǔn)算法的時(shí)間復(fù)雜度的前提下，大幅提高了校準(zhǔn)方法的精確度。</p><p style="text-indent:25px">不同種類(lèi)的高層應(yīng)用是通過(guò)相應(yīng)的應(yīng)用程序通過(guò)一定的應(yīng)用模式實(shí)現(xiàn)的一種無(wú)線通信。藍(lán)牙設(shè)備和其他的無(wú)線設(shè)備一樣，都是通過(guò)傳輸協(xié)議獲取數(shù)據(jù)，然后利用數(shù)據(jù)進(jìn)行工作。藍(lán)牙協(xié)議通俗點(diǎn)來(lái)說(shuō)就是兩個(gè)設(shè)備以某種提前約定好的規(guī)律，在某個(gè)時(shí)間點(diǎn)跳到某條頻率上然后一個(gè)發(fā)送數(shù)據(jù)包一個(gè)接受數(shù)據(jù)包，然后再跳到另外一條頻道上繼續(xù)發(fā)送接受。這個(gè)過(guò)程是很迅速的，大約每秒1600次左右。因?yàn)锽T4.0協(xié)議用的是2Mhz，所以有40條道，有效傳輸范圍比較小，加上跳頻的頻率很高，所以保持了數(shù)據(jù)的性。藍(lán)牙系統(tǒng)中的主單元都會(huì)通過(guò)自動(dòng)跳頻的形式進(jìn)行轉(zhuǎn)換，從而將其以隨機(jī)的進(jìn)行跳頻。不同種類(lèi)的高層應(yīng)用是通過(guò)相應(yīng)的應(yīng)用程序通過(guò)一定的應(yīng)用模式實(shí)現(xiàn)的一種無(wú)線通信。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā),藍(lán)牙頻率校準(zhǔn)" src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637304059522109375/4287794.png"></div><p style="text-indent:25px">芯片中固化了藍(lán)牙程序，但BGB204芯片的頻率精度和調(diào)制頻偏兩項(xiàng)射頻指標(biāo)的一致性差，必須在手機(jī)生產(chǎn)時(shí)對(duì)這兩項(xiàng)射頻參數(shù)進(jìn)行校準(zhǔn)，否則藍(lán)牙通訊功能會(huì)很差.現(xiàn)有技術(shù)中為了解決BGB204藍(lán)牙芯片頻率精度和調(diào)制頻偏兩項(xiàng)射頻指標(biāo)的一致性差的問(wèn)題，開(kāi)發(fā)了在生產(chǎn)中可以使用的BGB204的藍(lán)牙校準(zhǔn)程序BlueRF(測(cè)試軟件名稱)。BlueRF測(cè)試軟件在用過(guò)程中，存在這樣的幾個(gè)問(wèn)題1.部分手機(jī)的藍(lán)牙無(wú)法與綜測(cè)儀(CMU200,N401OA)連接.2.部分手機(jī)無(wú)法完成校準(zhǔn)過(guò)程.3.校準(zhǔn)時(shí)間比較長(zhǎng),平均校準(zhǔn)時(shí)間為80秒,較長(zhǎng)校準(zhǔn)時(shí)間可能達(dá)到120秒.4.測(cè)試誤測(cè)率較高,例如藍(lán)牙測(cè)試的一次通過(guò)率*有75%。藍(lán)牙4.0/4.1/4.2：增加低功耗功能，支持IPv6。武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā)</p><p style="text-indent:25px">在234G移動(dòng)通信系統(tǒng)中都廣fan使用了藍(lán)牙跳頻技術(shù)。武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā)</p><p style="text-indent:25px">頻偏指的是實(shí)際通信載波頻率與理論通信載波頻率之間的差值，當(dāng)該差值超過(guò)一定范圍時(shí)，將會(huì)因?yàn)轭l率相差太大，而使得誤碼率過(guò)大導(dǎo)致通信不穩(wěn)定，甚至無(wú)法通信。藍(lán)牙目前版本定義的工作頻率范圍是2.4GHz到2.4835GHz 10米之內(nèi)。隨著科技的發(fā)展，藍(lán)牙幾乎成為了各種手機(jī)、平板等終端的標(biāo)配。用戶對(duì)藍(lán)牙無(wú)線連接的穩(wěn)定性越來(lái)越高，導(dǎo)致部分用戶經(jīng)常反饋藍(lán)牙連接后又頻繁斷線的問(wèn)題。影響藍(lán)牙無(wú)線通信的因素主要有：頻偏、發(fā)射功率、接收靈敏度等，而影響通信穩(wěn)定性的因素主要為頻偏。武漢全自動(dòng)藍(lán)牙頻率校準(zhǔn)批發(fā)</p><p style="text-indent:25px">深圳市小牛測(cè)控技術(shù)有限公司總部位于深圳市龍華區(qū)東環(huán)二路69號(hào)慧華園廠房1棟411，是一家電子產(chǎn)品、儀器、儀表上門(mén)安裝及技術(shù)維護(hù); 經(jīng)營(yíng)進(jìn)出口業(yè)務(wù),^計(jì)算機(jī)軟件、嵌入式軟件、自動(dòng)化設(shè)備軟件、生產(chǎn)測(cè)試軟件開(kāi)發(fā)、生產(chǎn)及銷(xiāo)售；測(cè)試儀器、儀表及設(shè)備、自動(dòng)化測(cè)試系統(tǒng)、測(cè)試治具、通訊設(shè)備器材、工業(yè)自動(dòng)化控制系統(tǒng)、計(jì)算機(jī)硬件、計(jì)算機(jī)網(wǎng)絡(luò)設(shè)備的開(kāi)發(fā)、生產(chǎn)和銷(xiāo)售；電子產(chǎn)品的技術(shù)開(kāi)發(fā)、生產(chǎn)與銷(xiāo)售；測(cè)試儀器、儀表及設(shè)備、自動(dòng)化測(cè)試系統(tǒng)、測(cè)試治具、通訊設(shè)備器材、工業(yè)自動(dòng)化控制系統(tǒng)、計(jì)算機(jī)軟硬件、計(jì)算機(jī)網(wǎng)絡(luò)設(shè)備的開(kāi)發(fā)、生產(chǎn)和銷(xiāo)售。的公司。小牛測(cè)控深耕行業(yè)多年，始終以客戶的需求為向?qū)В瑸榭蛻籼峁?**的藍(lán)牙測(cè)試設(shè)備，藍(lán)牙燒錄設(shè)備，藍(lán)牙RF測(cè)試，電流測(cè)試設(shè)備。小牛測(cè)控致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對(duì)用戶產(chǎn)品上的貼心，為用戶帶來(lái)良好體驗(yàn)。小牛測(cè)控始終關(guān)注自身，在風(fēng)云變化的時(shí)代，對(duì)自身的建設(shè)毫不懈怠，高度的專注與執(zhí)著使小牛測(cè)控在行業(yè)的從容而自信。</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/2323373.html</p></div></div></div></div></div><div id="83ezgik" class="page-right twoColRt"><div id="3amo29i" class="box01 margin10 clearfix"><h3><a 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