https://devzone.nordicsemi.com/f/nordic-q-a/21446/using-nrf51822-to-achieve-sub-us-synchronization-between-mcusI have an application where I need to synchronize several devices to within 1us using a radio. In order to do this, we need to make a protocol that allows precise synchronization. We are already using a different vendor&#39;s 2.4GHz offering to do this, buten-USTelligent Community 13Thu, 20 Apr 2017 07:31:26 GMThttps://devzone.nordicsemi.com/thread/84124?ContentTypeID=1Thu, 20 Apr 2017 07:31:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:126ab2f5-ca6e-4952-a378-2dc8dd6367d6ovrebekk<p>I am happy to help. The best of luck with your project :)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84123?ContentTypeID=1Wed, 19 Apr 2017 16:58:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:110e2151-2666-4077-93b3-190ca837c1a2itsabouttime<p>Torbjørn, thanks for your quick and concise answer. Best regards.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/84122?ContentTypeID=1Wed, 19 Apr 2017 12:19:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3d06319a-2652-4de8-a821-c6f83d8db881ovrebekk<p>Hi</p> <p>At minimum you get a variance because of the random phase between the 16MHz peripheral clock in the TX and RX, which is between 0-62.5ns (this is the clock the PPI system is based on).<br /> There could also be some variance because of the internal timing engine in the radio, but this should be no more than a couple of hundred nanoseconds.</p> <p>The total variance should be less than 500ns, and I would expect a typical value around 250ns.</p> <p>Best regards<br /> Torbjørn</p><div style="clear:both;"></div>