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<DIV>Please beware if you are using an LPU to power your HPSDR system.</DIV>
<DIV> </DIV>
<DIV>As noted in LPU documents, it is rated 12 V @ 2 A and 5 V @ 2 A.</DIV>
<DIV> </DIV>
<DIV>The following info is contained in the same document:</DIV>
<DIV> </DIV>
<DIV>
12 V 5 v</DIV>
<DIV>OZY .001
A .1 A</DIV>
<DIV>PENY
.4 A .2 A</DIV>
<DIV>MERC .2
A .5 A</DIV>
<DIV> </DIV>
<DIV>and on Jan 12, Phil posted the following:</DIV>
<DIV>***** High Performance Software Defined Radio Discussion List
*****<BR><BR>Please note that with Metis running at 1Gb/s the +5v supply current
will<BR>increase by approximately 0.75A.<BR><BR>For this reason (for folks that
are using LPUs), and the fact that we<BR>don't need 1Gig rates to the PC just
yet, the initial release of Metis<BR>code will run at 100Mb/s.<BR><BR>73
Phil...VK6APH<BR><BR>*******</DIV>
<DIV> </DIV>
<DIV>End result is that the LPU is NOT suited to run HPSDR with multiple Mercury
</DIV>
<DIV>boards, Metis, Excalibur ( not sure on power usage), and Peny. The 5 V
regulator </DIV>
<DIV>is only rated at 2 A and I have experienced the 2.2 ohm resistor burning
up. </DIV>
<DIV>I measured the 5 V current drain with 5 boards on Atlas and in receive
mode</DIV>
<DIV>it was 2.97 Amps. This exceeds LPU specs. Add the fact that at 1Gb/s
the</DIV>
<DIV>current will increase by .75 Amps.</DIV>
<DIV> </DIV>
<DIV>If you are experiencing less than proper operation of your system, check
your</DIV>
<DIV>voltage at the Atlas test points.</DIV>
<DIV> </DIV>
<DIV>PLEASE BE AWARE!</DIV>
<DIV> </DIV>
<DIV>73 de Joe</DIV>
<DIV>K1RQG</DIV></FONT></BODY></HTML>