# Limesdr external clock

**URL:** <https://discourse.myriadrf.org/t/limesdr-external-clock/2058>\
**Category:** LimeSDR\
**Created:** [27 November 2017 03:57 UTC](https://discourse.myriadrf.org/t/limesdr-external-clock/2058 "2017-11-27T03:57:46Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![Zack](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/zack/32/89_2.png) [@Zack](https://discourse.myriadrf.org/u/Zack)\
**Post date:** [27 November 2017 06:54 UTC](https://discourse.myriadrf.org/t/limesdr-external-clock/2058/2 "2017-11-27T06:54:49Z")

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Hi @random,

If I understand correctly, you want to supply your own reference clock instead of on-board 30.72MHz. If this is a case, then you have to remove R137 resistor, solder R147. Then you may supply your external clock via J19 U.FL connector.

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