中文摘要：

介绍了LHAASO WCDA读出电子学时钟原型系统的设计，分析了该时钟系统的设计原理，介绍了测试方法和测试结果。该原型系统基于精简的whiteRabbitPmject原理设计，主要包括时钟源插件、时钟发送插件和时钟接收模块3部分。对该原型系统的测试结果表明，时钟接收模块上两时钟通道之间的时钟偏差可以调整到〈80ps，时钟抖动〈40ps，可满足LHAASO WCDA读出电子学设计需求。

英文摘要：

A prototype of the clock system for the LHAASO WCDA readout electronics is introduced, including the design principle of the prototype, the test setup and the test result. Based on the reduced and improved White Rabbit Project, the prototype mainly includes three parts： the clock source module, the clock transmitter module and the clock receiver module. The test result of the prototype shows that the clock skew between two channels on the clock receiver module can be adjusted to less than 80ps and the clock jitter is less than 40ps, which fulfills both the skew and the jitter requirement of less than lOOps for the LHAASO WCDA clock system.