To provide an inspection method of uplink reception sensitivity such that the inspection is efficiently conducted.SOLUTION: An inspection method includes: a first step of measuring a first reception sensitivity A in which, in a state that a light emitting and receiving device transmits a down link frame, a light emitting device transmits a low speed frame a prescribed number of times and the light emitting and receiving device receives the low-speed frame the prescribed number of times or more; a second step of measuring a second reception sensitivity B in which, in the state that the light emitting and receiving device transmits the down link frame, the light emitting device transmits the low-speed frame the prescribed number of time, and the light emitting and receiving device receives the low-speed frame the prescribed number of times or less; and a third step of measuring a third reception sensitivity C in which, in a state that the light emitting and receiving device ceases transmitting the down link frame, the light emitting device transmits a high-speed frame the prescribed number of times, and the light emitting and receiving device receives the high-speed frame the prescribed number of times or more; and a determination step of determining whether or not the measured first to third reception sensitivities A-C meet a determination criterion of C

    【課題】検査を効率的に行えるアップリンク受信感度の検査方法を提供する。【解決手段】検査方法は、投受光器がダウンリンクフレームを送信している状態で、発光器が低速フレームを所定回数送信し、投受光器の低速フレームの受信回数が所定回数以上となる第1受信感度Aを測定する第1工程と、投受光器がダウンリンクフレームを送信している状態で、発光器が低速フレームを所定回数送信し、投受光器の低速フレームの受信回数が所定回数以下となる第2受信感度Bを測定する第2工程と、投受光器がダウンリンクフレームの送信を停止している状態で、発光器が高速フレームを所定回数送信し、投受光器の高速フレームの受信回数が所定回数以上となる第3受信感度Cを測定する第3工程と、測定した第1〜第3受信感度A〜Cが、C<B<A≦0.3μW/cm2の判定基準を満たすか否かを判定する判定工程と、を含む。第1〜第3工程のうち第1工程を最初に実行する。【選択図】図4


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    Titel :

    INSPECTION METHOD OF UPLINK RECEPTION SENSITIVITY


    Weitere Titelangaben:

    アップリンク受信感度の検査方法


    Beteiligte:
    HAYAMA KOJI (Autor:in) / ASAO HIROTAKA (Autor:in) / MATSUKAWA NAOYA (Autor:in) / SUZUE ISSEI (Autor:in)

    Erscheinungsdatum :

    26.12.2019


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    IPC:    H04B TRANSMISSION , Übertragung / G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS



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