在白兔(White Rabbit)应用中测量秒脉冲(1PPS)信号的定时精度和抖动

作者 Mirco Kolarczik | 日期 19 April 2021

如今,准确计时信息的传输不仅在科学领域,而且在工业和金融领域也日渐受到重视。例如高频交易中需要通过精确时间戳记录交易成功的时间、判定不同交易的时序。精确时间协议(PTP),保证了在长距离上的纳秒级精度,白兔(White Rabbit)技术将其精度提高到了皮秒量级,进一步扩展了精确时间协议。稳定的同步系统是实现各种需要精确时间应用的可靠性和准确性的前提。

Swabian Instruments与白兔设备的领先供应商Seven Solutions的合作展示了Time Tagger Ultra在精确时间频率研究领域作为高精度测试设备的示例。虽然秒脉冲信号(1PPS)对于Time Tagger来说是一个全新的应用,不过Swabian Instruments已经为用户准备好了新的软件套件和测量类。Seven Solutions的团队使用Time Tagger Ultra分别测试了其系统的内部精度以及与GPS信号相比的外部精度,结果显示在有外部GPS信号的情况下,系统精度优于200 ps(RMS抖动≤120 ps),内部精度甚至可以达到30 ps以下(RMS抖动约17 ps)。这一结果展示了Seven Solutions公司的白兔系统优秀的稳定性和Swabian Instruments在该领域广泛的应用前景。

更多详细信息,请参见 应用文档 (PDF).

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