https://devzone.nordicsemi.com/f/nordic-q-a/52056/nrf52840-frequency-toleranceHi, nRF52840_PS has the following parameters. Could you tell me why &#177;30ppm? If it is &#177;40ppm, it can be understood as Bluetooth low energy spec.. https://devzone.nordicsemi.com/f/nordic-q-a/14478/nrf52832-frequency-tolerance-bluetooth ----en-USTelligent Community 13Tue, 24 Sep 2019 02:03:31 GMThttps://devzone.nordicsemi.com/thread/211395?ContentTypeID=1Tue, 24 Sep 2019 02:03:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ea664a37-f39d-4150-b2f1-2fc28507aec4UBAN<p><span class="tlid-translation translation" lang="en"><span title="">Thank you very much.</span></span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/209340?ContentTypeID=1Thu, 12 Sep 2019 08:37:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:71f637c5-733a-4058-bc61-87d2d881a94eH&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>If a packet is &gt;200 bytes (ie: longer time in TX and RX mode), the accumulated drift will be worse in case the transmitter and receiver are drifting in opposite directions.</p> <p>This is listed to ensure devices are sending/receiving properly, and to operate within all other RF PHY related specifications given in the product spec. Note that for packets less than 200 bytes, the requirement is &lt;=40 ppm:</p> <p><a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/clock.html?cp=3_0_0_4_3_3#unique_1001605180">https://infocenter.nordicsemi.com/topic/ps_nrf52840/clock.html?cp=3_0_0_4_3_3#unique_1001605180</a></p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>