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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Encoder receiver transmitter ： ウィキペディア英語版 Encoder receiver transmitter Encoder receiver transmitter (ERT) is a packet radio protocol developed by Itron for automatic meter reading.〔(【引用サイトリンク】title=Itron ERT technology )〕 The technology is used to transmit data from utility meters over a short range so a utility vehicle can collect meter data without a worker physically inspecting each meter. The ERT protocol was first described in US Patent 4,614,945. More technical detail is explained in later US patent 4,799,059. == Technical details == ERT is an OOK modulated radio signal which is transmitted in the unlicensed 900-920 MHz band.〔 The message is transmitted in the clear and uses Manchester encoding. The protocol uses frequency-hopping, a multiple access method to avoid interference with other nearby meters. SCM and IDM packet formats are described in US Patent 7,830,874: 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Encoder receiver transmitter」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.