# Enabling External Clock on LimeSDR mini 1.2?

**URL:** <https://discourse.myriadrf.org/t/enabling-external-clock-on-limesdr-mini-1-2/3066>\
**Category:** Projects\
**Created:** [26 July 2018 14:20 UTC](https://discourse.myriadrf.org/t/enabling-external-clock-on-limesdr-mini-1-2/3066 "2018-07-26T14:20:30Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![mc955](https://avatars.discourse-cdn.com/v4/letter/m/f08c70/32.png) [@mc955](https://discourse.myriadrf.org/u/mc955)\
**Post date:** [16 September 2018 19:47 UTC](https://discourse.myriadrf.org/t/enabling-external-clock-on-limesdr-mini-1-2/3066/3 "2018-09-16T19:47:27Z")

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Hi @Zack - so because of the lack of the additionial clock control circuitry present on the LimeSDR-USB, I’m guessing the lime mini will only work with a 40MHz external reference clock?

I couldn’t find any clarification of this on the hardware description page.

Thanks,  
Matt

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