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研究生: 李雅華
Ya-hwa Lee
論文名稱: 一個數位/類比廣播接收器自動測試設備之設計
Design of an Automatic Test Equipment for DAB/FM Receiver
指導教授: 吳傳嘉
Chwan-chia Wu
口試委員: 黃國安
none
謝錫堃
none
黎碧煌
Bih-Hwang Lee
學位類別: 碩士
Master
系所名稱: 電資學院 - 電機工程系
Department of Electrical Engineering
論文出版年: 2009
畢業學年度: 97
語文別: 中文
論文頁數: 93
中文關鍵詞: 自動測試設備靈敏度訊雜比
外文關鍵詞: DAB, ATE, sensitivity, SNR
相關次數: 點閱:125下載:0
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  • 現今數位傳播媒體的快速發展,使得人們對於所接收到的品質越來越重視外,對於多樣化的服務需求也日益增加。數位音頻廣播(Digital Audio Broadcasting , DAB),使用數位通訊技術不僅僅是改善了傳統AM或FM廣播主要傳送聲音且無法提供多媒體服務的缺點外,還能夠提供CD音質、抗多除路徑干擾、單頻網路以及單一頻道可同時提供六個以上的CD立體聲的電台節目,最重要的是還能提供大量的影像、圖片、文字、數據等…數位資訊傳輸(最大傳輸速率為1.5 M/sec),DAB的發展使廣播正式進入數位化的時代。
    也因為DAB有著許多以往傳統廣播沒有的優點,許多製造商開始投入產品的開發設計,而當產品開始準備進入最後的生產階段的同時,卻都會面臨到如何降低人力成本及以確保產品品質的重要課題。
    本研究的價值在於針對DAB接收模組設計一套自動化的測試平台及測試硬體設備,以達到降低人力及確保品質的目的。


    With the advent of multimedia technology, people pay much attention on audio quality of broadcasting programs, DAB(Digital Audio Broadcasting), improves the shortcoming that can't provide multimedia services by conventional analog broadcasting system, such as AM and FM .
    In addition, DAB can provide CD quality audio programmer, overcome multipath effect , have a SFN (Single Frequency Network), structure and broadcast more than six programs on a signal channel. Further, DAB is capable of providing digital multimedia service, such as picture , text , digital data , with the bandwidth up to 1.5 Mbps . The development of the DAB brings broadcasting industry into digital era.
    Many manufacturers start to put more effort into product design owing to the advantages of the DAB. However , they need to consider how to reduce labor cost to produce high quality product. This thesis is focused on designing an automatic testing platform and hardware to perform essential tests on DAB module. The main purpose is to achieve quality control on production of DAB module with minimal labor intervention.

    摘要........................................................... I Abstract....................................................... II 目錄........................................................... III 圖目錄......................................................... VI 表目錄......................................................... IX 第一章 緒論.................................................... 1 1.1 簡介....................................................... 1 1.2 研究動機與目的............................................. 6 1.3 章節架構................................................... 7 第二章 數位音訊廣播系統介紹.................................... 9 2.1 DAB 系統概述............................................... 9 2.1.1 傳輸機制(Transport Mechanisms)........................... 9 2.1.2 聲音編碼(Audio coding)................................... 12 2.1.3 時序交錯(Time interleaving).............................. 13 2.1.4 編碼正交分頻多工(COFDM).................................. 12 2.1.5 單頻網(SFN).............................................. 13 2.2 DAB 廣播系統架構........................................... 15 2.2.1 DAB 發射系統 ............................................. 15 2.2.2 DAB 接收系統 ............................................. 16 2.3 DAB 的框架格式及信號模式................................... 17 2.3.1 同步頻道(Synchronization channel)........................ 18 2.3.2 快速資訊頻道(Fast Information Channel, FIC).............. 18 2.3.3 主要服務頻道(Main Service Channel, MSC).................. 19 第三章 測試儀器與介面.......................................... 20 3.1 IEEE488.................................................... 20 3.1.1 裝置連接方法............................................. 20 3.1.2 IEEE 488訊號線........................................... 21 3.2 I2C........................................................ 22 3.3 RS-232通訊格式............................................. 24 3.4 測試設備................................................... 27 第四章 DAB接收模組與自動化測試系統............................. 30 4.1系統架構.................................................... 30 4.2測試項目.................................................... 32 4.2.1 LCD ...................................................... 32 4.2.2 DAB Sensitivity.......................................... 32 4.2.3 FM SNR................................................... 36 4.3 系統流程................................................... 38 4.4 系統實作................................................... 42 4.4.1 硬體實作................................................. 42 4.4.2 軟體實作................................................. 48 第五章 實驗結果與討論.......................................... 51 5.1 硬體與環境測試 ............................................. 51 5.1.1 硬體測試................................................. 51 5.1.2 環境干擾測試............................................. 53 5.2 穩定度測試................................................. 55 5.2.1 DAB穩定度測試............................................ 55 5.2.2 FM穩定度測試............................................ 58 5.3 可靠度測試................................................. 63 5.3.1 DAB可靠度測試............................................ 63 5. 3. 2 FM可靠度測試.......................................... 65 5.3.3 設計裝置與實際裝置數據可靠度測試......................... 67 第六章 結論.................................................... 71 參考文獻....................................................... 72 附錄........................................................... 77

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