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<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Scott,<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Thanks for info, but we do have the 2 relevant PTC 2A fuses, F2
and F3, in the voltage regulation circuitry. If the switched mode 5V
regulator is enabled, the (1,6A) current of the 5V rail is also flowing via
fuse F2 on the main DC rail (13-14V). Disabling the onboard SMPS and using a 5V
external source unloads fuse F2, but fuse F3 has still to carry full current.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I personally couldn’t discover any issues running Thetis
at highest sampling rates, but my boards are carefully cooled, hi. On the other
hand I noticed the high CPU-load, Thetis and the fast Ethernet is producing.
Perhaps that’s the reason for the reported effects.<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>73, Helmut, DC6NY<o:p></o:p></span></p>
<p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>Von:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> Hpsdr
[mailto:hpsdr-bounces@lists.openhpsdr.org] <b>Im Auftrag von </b>Scott Traurig<br>
<b>Gesendet:</b> Donnerstag, 27. April 2017 12:44<br>
<b>An:</b> hpsdr<br>
<b>Betreff:</b> Re: [hpsdr] protocol 2 for Hermes<o:p></o:p></span></p>
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<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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<p class=MsoNormal><span lang=EN-US>More details on the fuse problem are
available here:<o:p></o:p></span></p>
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<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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<p class=MsoNormal><a
href="https://apache-labs.com/community/viewtopic.php?f=17&t=2354&p=2381&hilit=fuse#p2381"><span
lang=EN-US>https://apache-labs.com/community/viewtopic.php?f=17&t=2354&p=2381&hilit=fuse#p2381</span></a><span
lang=EN-US><o:p></o:p></span></p>
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<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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<p class=MsoNormal><span lang=EN-US>73,<o:p></o:p></span></p>
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<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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<p class=MsoNormal><span lang=EN-US>Scott/w-u-2-o<o:p></o:p></span></p>
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<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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<p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p>
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<p class=MsoNormal><span lang=EN-US>On Thu, Apr 27, 2017 at 3:29 AM, Helmut
<</span><a href="mailto:dc6ny@gmx.de" target="_blank"><span lang=EN-US>dc6ny@gmx.de</span></a><span
lang=EN-US>> wrote:<o:p></o:p></span></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US>***** High
Performance Software Defined Radio Discussion List *****<br>
<br>
Hi,<br>
<br>
I agree with Marvin that no hardware modification seems necessary. Running here
Hermes from a 13.8V DC source, all onboard voltage regulators work fine and
sufficiently 'cool'.<br>
RX and Tx functions seem ok after a quick test, but obviously DUP RX is still
cancelled due to the lack of room in the FPGA. In my eyes DUP for real-time
monitoring of the TX spectrum is indispensable. I repeat my suggestion to use
the feedback RX of Pure Signal for this purpose.<br>
<br>
</span>Thanks guys in advance.<br>
<br>
73, Helmut, DC6NY<br>
<br>
<br>
-----Ursprüngliche Nachricht-----<br>
Von: Hpsdr [mailto:<a href="mailto:hpsdr-bounces@lists.openhpsdr.org">hpsdr-bounces@lists.openhpsdr.org</a>]
Im Auftrag von John Marvin<br>
Gesendet: Donnerstag, 27. <span lang=EN-US>April 2017 06:51<br>
An: </span><a href="mailto:hpsdr@lists.openhpsdr.org"><span lang=EN-US>hpsdr@lists.openhpsdr.org</span></a><span
lang=EN-US><br>
Betreff: Re: [hpsdr] protocol 2 for Hermes<br>
<br>
***** High Performance Software Defined Radio Discussion List *****<br>
<br>
Note that as far as the power supply issue is concerned regarding the<br>
original Hermes, I don't think there is any hardware change that needs<br>
to be made to the board itself. It's a matter of setting the right<br>
jumpers and providing an external supply capable of delivering both a<br>
regulated 12V supply and a regulated 5V supply. The details regarding<br>
this can be found in the Hermes manual. So no SMD soldering is<br>
required, but some external hardware changes will need to be made, the<br>
difficulty of which will depend on your current power supply and the<br>
case you are currently using.<br>
<br>
It does sound like owners of original Hermes boards would need to do<br>
some soldering to replace the resettable fuses. I'd certainly like more<br>
details regarding that, since my primary transceiver is based on a TAPR<br>
produced Hermes board and I would like to be able to run multiple<br>
receiver slices at maximum sample rates, which would require the use of<br>
1Gbit networking.<br>
<br>
</span>Regards,<br>
<br>
John<br>
AC0ZG<o:p></o:p></p>
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