[hpsdr] Metis hang

[Mike Stevenson]

I think you are right Phil.
I just started KK and the hardware, sync lost in just over 1 minute.
Recycled power to hardware, restarted KK and has now working for 2hrs and 
from past experience may now work all day.
Hardware in Pandora , no fan.
I tried Metis 1.7 and had the same problem
I have lost track of earlier compatible builds to try.
I think Metis 1.6  builds were OK but do no know builds of Mercury and 
Pennylane.

I will have to learn about Wireshark.

73
Mike G8ALS

-----Original Message----- 
From: Phil Harman
Sent: Wednesday, July 25, 2012 8:33 AM
To: Hermann
Cc: Abhi A ; hpsdr at lists.openhpsdr.org
Subject: Re: [hpsdr] Metis hang

***** High Performance Software Defined Radio Discussion List *****

Not sure that I agree. This part is used on the Micrel PHY evaluation
board and I ran it at 1000T for days on end without any problems.

I also ran 1000T on my Metis board whilst developing the code and whilst
U15 does get very hot it is still well within specs.

I have had a report of this problem being cured by reverting to previous
versions of Metis, Mercury and Penelope code.

In which case it may be a timing issue that is exaggerated when the FPGA
gets hot.

I can't reproduce this problem, and my boards run for many hours on end.

A Wireshark trace would be helpful since we would be able to see if its
Metis or Mercury that is stopping sending data.

73 Phil...VK6APH





> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Abhi, all,
>
> thanks for the comment. Meanwhile I use an active cooling for Metis, and
> the situation improved considerably. But it happens still once in a while.
>
> 73, Hermann
>
> On Wed, Jul 25, 2012 at 9:08 AM, Abhi A <abhiarunoday at gmail.com> wrote:
>
>>
>>
>> The culprit is U15, this is a switching MOSFET used by micrel with their
>> PHY chip for the 1.2v supply, I noticed this problem when we build the
>> Alpha Ethernet Hermes and replaced it with a 1.2v LDO, the only way of
>> solving this issue is to provide active cooling such as a fan,
>>
>> 73s,
>> Abhi
>>
>>
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