https://devzone.nordicsemi.com/f/nordic-q-a/6469/antwareii-searches-much-faster-than-my-nrf51422In my test, with the same configuration, ANTWARE II always searches much faster than nRF51422 software. For example. I have Master channel and Slave channel set up at 4Hz. Use one of my nRF51422 board as the master channel. Use ANTWARE II as theen-USTelligent Community 13Mon, 13 Apr 2015 14:09:35 GMThttps://devzone.nordicsemi.com/thread/22567?ContentTypeID=1Mon, 13 Apr 2015 14:09:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:9b19d248-14d9-4c07-a2bb-afa1503a092aPaul<p>P.S. I think ANT II is using 97 too. Be aware. any number other than 316 or 97 may not work because the searching algorithm Dynastream is using.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/22566?ContentTypeID=1Mon, 13 Apr 2015 14:08:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:45ec4e49-0cb3-4721-818e-59c0e55fa674Paul<p>Thanks Petter. I am working on this right now :-) sd_ant_search_waveform_set() did the trick. default is 316, I set it to 97 as ANT datasheet suggested. Now it tracks much faster.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/22565?ContentTypeID=1Mon, 13 Apr 2015 14:05:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:64e9e8c4-02b7-4fa3-9584-305b17beda1aPetter Myhre<p>1.5 seconds on average and 3 seconds as maximum is expected with the nRF51422 as a slave, with a message period of 4 Hz on the master.</p> <p>I&#39;m not sure how ANTWARE II is searching, but it may be using High Duty Search since it is using an USB device. nRF51422 can&#39;t use High Duty Search. For more information, please see Page 58 and Page 80 in the ANT Message Protocol and Usage, Rev 5.1.</p> <p>You may be able to reduce the search time by changing the search waveform, but I haven&#39;t tested this myself. For more information, please see <code>sd_ant_search_waveform_set()</code> and Page 70 ANT Message Protocol and Usage, Rev 5.1.</p><div style="clear:both;"></div>