https://devzone.nordicsemi.com/f/nordic-q-a/38894/scan-durationHello, I am using nRF52480, s140 , SDK_15.0 and using a rscs central example. I used uint32_t current_time = app_timer_cnt_get(); NRF_LOG_INFO(&quot;current_Tick: %02d&quot;, current_time); uint32_t CurrentTIME = current_time/32.768; NRF_LOG_INFO(&quot;current_timeen-USTelligent Community 13Thu, 27 Sep 2018 11:57:55 GMThttps://devzone.nordicsemi.com/thread/150686?ContentTypeID=1Thu, 27 Sep 2018 11:57:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:89f768c0-7d8a-4c75-9ccc-ad6c783c5891Kenneth<p>Maybe it is related to this:</p> <p><a href="https://devzone.nordicsemi.com/f/nordic-q-a/19621/rtc1-counter-return-to-0">https://devzone.nordicsemi.com/f/nordic-q-a/19621/rtc1-counter-return-to-0</a>&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/150546?ContentTypeID=1Wed, 26 Sep 2018 17:05:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:12a24fc0-7e15-487c-bae6-047c00f17266Lexi<p>Hi Kenneth, thanks for your reply, but still I can not get it why it stop at 512000??, it is 2.4Ghz BLE on 3 different advertising channel.&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/150484?ContentTypeID=1Wed, 26 Sep 2018 12:33:09 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e98c8c1e-0028-4fcc-96be-67202d6da5d7Kenneth<p>Hello,</p> <p>The RSSI is&nbsp;heavily influenced by the antenna, an since there is no perfect omni-directional antenna with a flat gain over the 2.4GHz, then you typically end up with an antenna that have different gain over the 2.4GHz band, and with different gain depending on rotation of the antenna. Overall it looks like this is what you can expect. Several dB difference is normal. It may also look as you have a noise source in the upper 2.4GHz band (e.g. WIFI?) that prevent you from receiving much advertisement packets there.</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>