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        <title>gps_授时:驯服时钟模块</title>
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        <description>GPS 授时/驯服时钟模块（GPSDO 思路：绝对时间 + 高稳定频标）

模块描述

	* 输出1PPS（秒脉冲）与 UTC 时间，必要时可驯服本地 OCXO/TCXO 做高稳频标
	* 典型元器件：u-blox 系列 GNSS 模块（带 1PPS）、10MHz OCXO/TCXO（可选）</description>
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