石家莊多功能藍(lán)牙頻率校準(zhǔn) 深圳市小牛測控供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="藍(lán)牙頻率測試校準(zhǔn)裝置，其特征在于所述裝置由藍(lán)牙PCBA測試板、待測藍(lán)牙模組組成，藍(lán)牙PCBA測試板為整個(gè)系統(tǒng)的測試校準(zhǔn)裝置，對(duì)藍(lán)牙模組進(jìn)行頻偏校準(zhǔn)與測試；其中，藍(lán)牙PCBA測試板的組成模塊有：電源供電模塊，TFTLCD模塊，BLE連接測試模"><meta name="keywords" content="石家莊多功能藍(lán)牙頻率校準(zhǔn),藍(lán)牙頻率校準(zhǔn)"><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" 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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>石家莊多功能藍(lán)牙頻率校準(zhǔn),藍(lán)牙頻率校準(zhǔn)</p><p><span>***更新：</span>2021-02-03 07:09:53</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="ui7lxz7" 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="aegipw3" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ve8pg8e" class="box"><p><p style="text-indent:25px">藍(lán)牙頻率測試校準(zhǔn)裝置，其特征在于所述裝置由藍(lán)牙PCBA測試板、待測藍(lán)牙模組組成，藍(lán)牙PCBA測試板為整個(gè)系統(tǒng)的測試校準(zhǔn)裝置，對(duì)藍(lán)牙模組進(jìn)行頻偏校準(zhǔn)與測試；其中，藍(lán)牙PCBA測試板的組成模塊有：電源供電模塊，TFTLCD模塊，BLE連接測試模塊，按鍵模塊，石家莊多功能藍(lán)牙頻率校準(zhǔn)，晶振頻偏測試模塊，主控MCU，石家莊多功能藍(lán)牙頻率校準(zhǔn)。電源供電模塊負(fù)責(zé)給待測PCBA進(jìn)行供電，TFTLCD模塊負(fù)責(zé)對(duì)測試結(jié)果進(jìn)行顯示，石家莊多功能藍(lán)牙頻率校準(zhǔn)，BLE連接測試模塊對(duì)鎖相環(huán)鎖定錯(cuò)誤產(chǎn)生的頻偏進(jìn)行篩選，同時(shí)對(duì)晶振頻偏校準(zhǔn)結(jié)果進(jìn)行確認(rèn)；按鍵模塊控制測試過程的開始。藍(lán)牙的安全性問題。藍(lán)牙的初次配對(duì)需要用戶通過PIN碼驗(yàn)證。跳頻收發(fā)器用于對(duì)抗干擾及信號(hào)衰減。石家莊多功能藍(lán)牙頻率校準(zhǔn)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石家莊多功能藍(lán)牙頻率校準(zhǔn),藍(lán)牙頻率校準(zhǔn)" src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637304059306308594/8425548.png"></div><p style="text-indent:25px">藍(lán)牙設(shè)計(jì)初衷是點(diǎn)對(duì)點(diǎn)連接（一個(gè)master一個(gè)slave），Wi-Fi是server/client方式。兩個(gè)藍(lán)牙設(shè)備默認(rèn)可以直接連接，無需中間節(jié)點(diǎn)，連接速度快，Wi-Fi則要麻煩的多，大多數(shù)設(shè)備默認(rèn)Infrastructure模式，必須有中間節(jié)點(diǎn)做AP，Wi-Fi只有在AD-HOC模式下才是點(diǎn)對(duì)點(diǎn)的連接，配置相對(duì)繁瑣。功耗和傳輸范圍：藍(lán)牙的功耗相對(duì)低，傳輸距離近，尤其是BLE。Wi-Fi功耗普遍比較大，傳輸距離比藍(lán)牙要遠(yuǎn)。藍(lán)牙1.2：增加了自適應(yīng)跳頻擴(kuò)頻（AFH），通過避免在跳頻序列中使用擁擠的頻率，提高了對(duì)射頻干擾的抵抗。藍(lán)牙2.0/2.1（+EDR）：增加了增強(qiáng)數(shù)據(jù)率（EDR），它能夠?qū)崿F(xiàn)更快速的數(shù)據(jù)傳輸。石家莊多功能藍(lán)牙頻率校準(zhǔn)參考靈敏度是指滿足一定的誤碼率情況下，接收機(jī)可以接收的小電平。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石家莊多功能藍(lán)牙頻率校準(zhǔn),藍(lán)牙頻率校準(zhǔn)" src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637304059611699219/6753670.png"></div><p style="text-indent:25px">原理：藍(lán)牙是一種無線技術(shù)標(biāo)準(zhǔn)，可實(shí)現(xiàn)固定設(shè)備、移動(dòng)設(shè)備和樓宇個(gè)人域網(wǎng)之間的短距離數(shù)據(jù)交換(使用2.4-2.485GHz的ISM波段的UHF無線電波)。藍(lán)牙可連接多個(gè)設(shè)備，克服了數(shù)據(jù)同步的難題。藍(lán)牙技術(shù)是世界卓著的5家大公司一愛立信(Ericsson)、諾基亞(Nokia)、東(TOshiba)、國際商用機(jī)器公司(IBM)和英特爾(Intel)，于1998年5月聯(lián)合宣布的一種無線通信新技術(shù)。藍(lán)牙設(shè)備是藍(lán)牙技術(shù)應(yīng)用的主要載體，常見藍(lán)牙設(shè)備比如電腦、手機(jī)等。藍(lán)牙產(chǎn)品容納藍(lán)牙模塊，支持藍(lán)牙無線電連接與軟件應(yīng)用。</p><p style="text-indent:25px">藍(lán)牙頻率晶振頻偏測試模塊完成藍(lán)牙模組頻偏的測試與校準(zhǔn)，主控MCU實(shí)現(xiàn)對(duì)整個(gè)系統(tǒng)各個(gè)模塊的控制。2.一種藍(lán)牙頻偏測試校準(zhǔn)方法，其特征在于該方法包括如下步驟：101、藍(lán)牙PCBA測試板上電，并進(jìn)行初始化；102、對(duì)待測藍(lán)牙模組DUT進(jìn)行上電，開始測試與校準(zhǔn)過程；103、通過調(diào)試接口，配置DUT輸出PWM方波，該方波頻率為500Hz，并計(jì)算PWM方波的平均頻率；藍(lán)牙的波段為2400–2483.5MHz（包括防護(hù)頻帶）。這是全球范圍內(nèi)無需取得執(zhí)照（但并非無管制的）的工業(yè)、科學(xué)和醫(yī)療用（ISM）波段的 2.4 GHz 短距離無線電頻段。輸出電平0dBm至-120dBm可調(diào)，分辯0.1db。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="石家莊多功能藍(lán)牙頻率校準(zhǔn),藍(lán)牙頻率校準(zhǔn)" src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637304059155507813/797469.png"></div><p style="text-indent:25px">藍(lán)牙增強(qiáng)數(shù)據(jù)率（Enhanced Data Rate，簡稱EDR）一詞用于描述π/4-DPSK 和 8DPSK 方案, 分別可達(dá)2 和 3Mbit/s。在藍(lán)牙無線電技術(shù)中，兩種模式（BR和EDR）的結(jié)合統(tǒng)稱為“BR/EDR射頻”。藍(lán)牙是基于數(shù)據(jù)包、有著主從架構(gòu)的協(xié)議。一個(gè)主設(shè)備至多可和同一微微網(wǎng)中的七個(gè)從設(shè)備通訊。所有設(shè)備共享主設(shè)備的時(shí)鐘。分組交換基于主設(shè)備定義的、以312.5μs為間隔運(yùn)行的基礎(chǔ)時(shí)鐘。兩個(gè)時(shí)鐘周期構(gòu)成一個(gè)625μs的槽，兩個(gè)時(shí)間隙就構(gòu)成了一個(gè)1250μs的縫隙對(duì)。在單槽封包的簡單情況下，主設(shè)備在雙數(shù)槽發(fā)送信息、單數(shù)槽接受信息。而從設(shè)備則正好相反。藍(lán)牙頻率測試校準(zhǔn)裝置，其特征在于裝置由藍(lán)牙PCBA測試板。石家莊多功能藍(lán)牙頻率校準(zhǔn)</p><p style="text-indent:25px">藍(lán)牙技術(shù)在實(shí)際應(yīng)用期間，可以原有的頻點(diǎn)進(jìn)行劃分、轉(zhuǎn)化。石家莊多功能藍(lán)牙頻率校準(zhǔn)</p><p style="text-indent:25px">調(diào)制頻率精度模塊包含下面步驟判斷是否已有頻率精度通過的手機(jī)如果有，將統(tǒng)計(jì)得到的已經(jīng)通過頻率精度測試的DAC值作為調(diào)整的初始值；如果沒有，讀取手機(jī)中藍(lán)牙頻率精度的DAC值作為調(diào)整的初始值；用測試軟件調(diào)整手機(jī)中的頻率精度直到合格；將合格的頻率精度的DAC值存儲(chǔ)并與以前所有合格的DAC值進(jìn)行統(tǒng)計(jì)計(jì)算，得到下一次頻率的初始DAC值本發(fā)明提供一種能有效解決現(xiàn)有技術(shù)中存在問題的藍(lán)牙射頻校準(zhǔn)測試方法，能使實(shí)施本發(fā)明后所需要的籃牙設(shè)備資金降低到以前的1/3，并且可以節(jié)省人力，提高生產(chǎn)工作效率。石家莊多功能藍(lán)牙頻率校準(zhǔn)</p><p style="text-indent:25px">深圳市小牛測控技術(shù)有限公司位于深圳市龍華區(qū)東環(huán)二路69號(hào)慧華園廠房1棟411。公司業(yè)務(wù)分為藍(lán)牙測試設(shè)備，藍(lán)牙燒錄設(shè)備，藍(lán)牙RF測試，電流測試設(shè)備等，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)。公司從事儀器儀表多年，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)。小牛測控秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實(shí)”的經(jīng)營理念，全力打造公司的重點(diǎn)競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3138159.html</p></div></div></div></div></div><div id="mwi2xt2" class="page-right twoColRt"><div id="3czli87" class="box01 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