Hi Thomas.<div><br></div><div><div style="background-color:rgb(255,255,255)"><div><font color="#222222" face="arial, sans-serif">Could you please make test again for LO integral phase noise and modulation accuracy with PLL loop filter 100kHz and ICP=0.4mA (or above), as Srdjan suggested us.</font></div>
<div><font color="#222222" face="arial, sans-serif">I&#39;ve assembled 100kHz loop filter with the next components:</font></div><div><font color="#222222" face="arial, sans-serif">C82 = 100pF, C83=1500pF, C84=33pF, R106=2.2k, R109=3.3k.</font></div>
<div><font color="#222222" face="arial, sans-serif">To get good noises replace choke L6 by capacitor 10nF..22nF and remove C45.</font></div><div><br></div><div><font color="#222222" face="arial, sans-serif">I ask you because I have to send final BOM as soon as possible to avoid delay of UmTRXv2 production due to changes for improvements.</font></div>
</div></div><div> <br clear="all">Best regards,<div>Andrey Sviyazov.</div><div>P.S. <span style="color:rgb(34,34,34);font-family:arial,sans-serif;background-color:rgb(255,255,255)">Pictures attached just to be sure.</span></div>

<br><br><div class="gmail_quote">2012/7/23 Andrey Sviyazov <span dir="ltr">&lt;<a href="mailto:andrey.sviyazov@fairwaves.ru" target="_blank">andrey.sviyazov@fairwaves.ru</a>&gt;</span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">


<div><p><br>
&gt; &gt; Perhaps this is a silly question, but how do I calibrate the clock? or<br>
&gt; &gt; use an external reference signal?<br>
&gt;<br>
&gt; Andrey Sviyazov - does ClockIn works as external input in UmTRXv1?</p>
</div><p>Yes, 5V cmos level required or smaller with DC offset to get 2.5V symmetry.<br>
Turn switches to MHz and slave positions.</p><div><div>
<p>Best regards,<br>
Andrey Sviyazov. <br>
(Sent from my mobile client) </p>
</div></div></blockquote></div><br></div>