https://devzone.nordicsemi.com/f/nordic-q-a/7006/time-between-payload-sent-and-payload-receivedI&#39;m implmenting my own radio porotcol and I&#39;m a little confuse on how to handle the ACK packet. I send a packet from node 1 and disable the TX then I enable the RX to get the ACK. On the node 2 that got the packet and is answer the ACK should I use anen-USTelligent Community 13Tue, 12 May 2015 10:34:56 GMThttps://devzone.nordicsemi.com/thread/24710?ContentTypeID=1Tue, 12 May 2015 10:34:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:af309693-e905-4ded-b81e-b43e8fb759c2Jose Xavier<p>I realize that after some sleep :p</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/24709?ContentTypeID=1Tue, 12 May 2015 10:25:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3ddafb8d-c554-42f0-8a84-33b90273765bshibshab<p>As you need to disable the radio to change from TX to RX you would need to complete the entire &quot;ramp up&quot; process, which takes ~140us when using all the appropriate shorts. See chapter 17 Radio in the nRF51 Reference Manual.</p> <p>If both sides of this protocol are nRF51 you would not have to add any delay as both will need the same amount of time going from TX to RX state (and vice versa).</p><div style="clear:both;"></div>