Hi Dieter,<br /><br />&gt;<br />&gt; To be true, I don&#39;t know where the &quot;- 100&quot; in the recent versions come<br />&gt; from. In earlier version the actual AT time was 54 (DSP_SETUP_TIME -<br />&gt; TSP_DELAY - 6). <br /><br />When you look deeper into the call, there is the PLL setup that is done even earlier, to ensure that it&#39;s finished by that &#39;start&#39; time.<br /><br /><br />    Sylvain