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href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應</a>?<a href="http://www.cdcfah.com/cp/first-_smdn/">數(shù)碼、電腦</a>?<a href="http://www.cdcfah.com/cp/second-smdn_sjpjgd/">手機配件</a>?<a href="http://www.cdcfah.com/cp/third-sjpjgd_lyspq/">藍牙適配器</a>?常州全自動藍牙測試設備系統(tǒng) 深圳市小牛測控供應</p><div id="nmlc8xm" class="leftbox clearfix"><h1>常州全自動藍牙測試設備系統(tǒng) 深圳市小牛測控供應</h1><div id="vk9xz7g" class="proBig"><div id="3ax3sht" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637304051621621094/1489300.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="odxmdpq" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637304051621621094/1489300.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="kmbkrdx" 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>廣東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>常州全自動藍牙測試設備系統(tǒng),藍牙測試設備</p><p><span>***更新：</span>2021-02-07 09:09:29</p><p><span id="click" >瀏覽次數(shù)：8次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="23slnuw" 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: </span>0755-21008225</p><p><span>地址: </span>深圳市龍華區(qū)東環(huán)二路69號慧華園廠房1棟411</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="vuqxeah" class="page-proshow02"><p class="title">詳細說明</p><div id="vf8jqhd" class="box"><p><p style="text-indent:25px">當EUT工作在高頻點時，藍牙測試儀找到功率密度下降為-80dBm/Hz時的頻點fH。對于79信道的系統(tǒng)，要求fL、fH位于2.4～2.4835GHz范圍內(nèi)。20dB帶寬初始狀態(tài)同，EUT分別工作在低、中、高三個頻點，常州全自動藍牙測試設備系統(tǒng)，常州全自動藍牙測試設備系統(tǒng)，回送調(diào)制信號為PN9的DH1分組。測試儀掃頻找到對應大功率的頻點，并且找到其左右兩側對應功率下降20dB時的fL和fH，20dB帶寬Df = | fH - fL |，要求Df小于1MHz。相鄰信道功率。初始狀態(tài)同, EUT工作頻點分別為第3信道，常州全自動藍牙測試設備系統(tǒng)、第39信道和第75信道，回送凈荷為PN9的DH1分組。測試儀掃描整個藍牙頻段，測試各個信道的功率。藍牙射頻設計采用了多藍牙設備工作于ISM頻段。常州全自動藍牙測試設備系統(tǒng)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州全自動藍牙測試設備系統(tǒng),藍牙測試設備" src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637304051621621094/1489300.png"></div><p style="text-indent:25px">藍牙測試通常中頻相當高，以限制濾波器元件的物理尺寸，使中頻遠離LO頻率，確保足夠的鏡像抑zhi。如果電平過高造成接收qi輸入過載，則應使用天線開關。無論設計提供的功率是+20dBm還是更低，接收qi都需要有接收信號強度指示，RSSI信息允許不同功率設備間互相聯(lián)系，這類設計中的功率斜率可由控制放大器的偏置電流實現(xiàn)。與其它TDMA系統(tǒng)如DECT或GSM不同，藍牙頻譜測試并不限于單獨的功率控制和調(diào)制誤差測試，它的測量間隔時間必須足夠長，以采集到斜率和調(diào)制造成的影響。北京二手藍牙測試設備系統(tǒng)藍牙測試儀找到功率密度下降為-80dBm/Hz時的頻點fL；</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州全自動藍牙測試設備系統(tǒng),藍牙測試設備" src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637303348833710937/4721071.png"></div><p style="text-indent:25px">藍牙是基于數(shù)據(jù)包、有著主從架構的協(xié)議。一個主設備至多可和同一微微網(wǎng)中的七個從設備通訊。所有設備共享主設備的時鐘。分組交換基于主設備定義的、以312.5μs為間隔運行的基礎時鐘。兩個時鐘周期構成一個625μs的槽，兩個時間隙就構成了一個1250μs的縫隙對。在單槽封包的簡單情況下，主設備在雙數(shù)槽發(fā)送信息、單數(shù)槽接受信息。而從設備則正好相反。封包容量可長達1、3、或5個時間隙，但無論是哪種情況，主設備都會從雙數(shù)槽開始傳輸，從設備從單數(shù)槽開始傳輸。藍牙系統(tǒng)由藍牙模塊、藍牙協(xié)議、系統(tǒng)應用和無線電波組成，由于使用波長特別短，可將天線、控制器、編碼器和收發(fā)器均集成在一個微型模塊內(nèi)，簡稱藍牙模塊。</p><p style="text-indent:25px">與其它工作在相同頻段的系統(tǒng)相比，藍牙跳頻更快，數(shù)據(jù)包更短，這使藍牙測試設備比其它系統(tǒng)都更穩(wěn)定。藍牙測試設備的一大優(yōu)勢是它應用了全球統(tǒng)一的頻率設定，這就消掉了“國界”的障礙，而在蜂窩式移動電話領域，這個障礙已經(jīng)困擾用戶多年。另外，ISM頻段是對所有無線電系統(tǒng)都開放的頻段，因此使用其中的某個頻段都會遇到不可預測的干擾源。跳頻技術是把頻帶分成若干個跳頻信道，在一次連接中，無線電收發(fā)器按一定的碼序列不斷地從一個信道跳到另一個信道，只有收發(fā)雙方是按這個規(guī)律進行通信的，而其它的干擾不可能按同樣的規(guī)律進行干擾；跳頻的瞬時帶寬是很窄的，但通過擴展頻譜技術使這個窄帶或成倍地擴展成寬頻帶，使干擾可能的影響變成很小。藍牙基帶控制器：是藍牙模塊中的關鍵模塊。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="常州全自動藍牙測試設備系統(tǒng),藍牙測試設備" src="https://tyunfile.71360.com/UploadFile/xiaoniucekong/637303348808701172/1724351.png"></div><p style="text-indent:25px">把藍牙測試設備上的載波上移157kHz代替“1”，下移157kHz代替“0”，速率為100萬符號（或比特）/秒，然后用“0.5”將數(shù)據(jù)濾波器的-3dB帶寬設定在500kHz，這樣可以限制射頻占用的頻譜。兩個設備間通過時分復用（TDD）方式通信，發(fā)送器和接收qi在相隔時段中交替?zhèn)魉?，即一個挨著另一個傳送，此外還采用了一種極快的跳頻方案（1，600跳/秒），以便在擁擠波段中提高鏈路可靠性。美國聯(lián)邦通信wei員會預計波段利用率將不斷增加，因此可靠性是基本的要求。藍牙測試設備將通信控制模塊、藍牙模塊、供電模塊、信號發(fā)生模塊和音頻處理模塊集成在一起。貴陽電子藍牙測試設備系統(tǒng)</p><p style="text-indent:25px">藍牙測試設備是基于低成本的近距離無線連接。常州全自動藍牙測試設備系統(tǒng)</p><p style="text-indent:25px">藍牙IQ調(diào)制誤差意味著存在幅度調(diào)制，可用功率-時間顯示進行檢測，或用矢量分析儀做詳細調(diào)查。IQ調(diào)制器也可用來整形功率斜坡，這再次說明了選通測量的價值。在接收鏈所有測量進行之前，還有些數(shù)字處理需要測量誤碼。另外可能出現(xiàn)零中頻系統(tǒng)，可由查找接收qi混頻器輸出和ADC輸入之間的DC塊識別。像LO-RF反饋這類非理想情況會產(chǎn)生隨輸入頻率改變的直流成分，需要認真予以處理。另外邊帶抑zhi也是一個問題，這里有個速算公式，即0.1dB增益誤差或1度相位誤差將使邊帶降低約40dB。常州全自動藍牙測試設備系統(tǒng)</p><p style="text-indent:25px">深圳市小牛測控技術有限公司位于深圳市龍華區(qū)東環(huán)二路69號慧華園廠房1棟411。公司業(yè)務分為藍牙測試設備，藍牙燒錄設備，藍牙RF測試，電流測試設備等，目前不斷進行創(chuàng)新和服務改進，為客戶提供良好的產(chǎn)品和服務。公司從事儀器儀表多年，有著創(chuàng)新的設計、強大的技術，還有一批**的專業(yè)化的隊伍，確保為客戶提供良好的產(chǎn)品及服務。小牛測控秉承“客戶為尊、服務為榮、創(chuàng)意為先、技術為實”的經(jīng)營理念，全力打造公司的重點競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3200415.html</p></div></div></div></div></div><div id="l33y2u3" class="page-right twoColRt"><div id="wn5g9az" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="8x8cwi2" class="recomPic likePro"><a 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