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<DIV>All,</DIV>
<DIV> </DIV>
<DIV>Sorry, missed this important point in the previous announcement.</DIV>
<DIV> </DIV>
<DIV>Short Version:</DIV>
<DIV> </DIV>
<DIV>When using the latest version of the code select the 122.88MHz clock from
Mercury</DIV>
<DIV> </DIV>
<DIV>Long Version:</DIV>
<DIV> </DIV>
<DIV>When we designed Penny and Mercury we provided the option, for those that
were building their own boards, to use one 122.88MHz clock and feed it to the
other board via an LVDS link over a short twisted pair. With the boards
that TAPR sold/sells this is not necessary since each board has its own
122.88MHz and we phase lock these together via either 10MHz TCXOs or an external
reference on Atlas C16.</DIV>
<DIV> </DIV>
<DIV>We found that switching between the two 122.88MHz clocks was not a simple
task and also complicated the number of signals required on the Atlas bus. So
with Kirk's new code, if you have a Mercury board on the Atlas bus then always
select Mercury as the source of the 122.88MHz. </DIV>
<DIV> </DIV>
<DIV>If you have built your own boards, and your 122.88MHz clock is on Penny,
then use a twisted pair between it and Mercury to provide clocks and
select Penny as your clock source. </DIV>
<DIV> </DIV>
<DIV>Bill will add this logic into PowerSDR shortly so the clock selection is
automatic.</DIV>
<DIV> </DIV>
<DIV>Again - sorry this slipped through the cracks last time.</DIV>
<DIV> </DIV>
<DIV>73's Phil...VK6APH </DIV>
<DIV> </DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=steve_doyle@o2.co.uk href="mailto:steve_doyle@o2.co.uk">Steven
Doyle</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=phil@pharman.org
href="mailto:phil@pharman.org">Phil Harman</A> ; <A title=K1rqg@aol.com
href="mailto:K1rqg@aol.com">K1rqg@aol.com</A> ; <A title=bill@ewjt.com
href="mailto:bill@ewjt.com">bill@ewjt.com</A> ; <A
title=hpsdr@lists.openhpsdr.org
href="mailto:hpsdr@lists.openhpsdr.org">hpsdr@lists.openhpsdr.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, May 30, 2009 10:02
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [hpsdr] Come and get it,
code's ready!</DIV>
<DIV><BR></DIV>
<DIV>Phil,</DIV>
<DIV> </DIV>
<DIV>Selecting the mercury clock indeed solves the problem.</DIV>
<DIV> </DIV>
<DIV>thanks</DIV>
<DIV> </DIV>
<DIV>Steve</DIV>
<DIV>G1YLB</DIV>
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