[widar-wg] Finished with B108-b-XX boards; test results; H/W faults found :-(

[Brent Carlson]

Ken,

On 08/06/2011 4:25 PM, Ken Sowinski wrote:
> On Wed, 8 Jun 2011, Brent Carlson wrote:
>
>> 5. Board b108-b-4 seems to have a transmit connection problem with the
>> CBE switch, probably due to a cabling fault, but could be anywhere
>> including traces on the PCB, or the SFP module itself.  The outgoing
>> packets are all addressed fine, but the CRM/mccc packet reader thing
>> fails to detect them, whereas it is fine for other boards.  The "SFP1"
>> LED in the GigE GUI is green, but this just means the receiver is
>> getting good signal and codes from the switch.  Can someone look at the
>> switch port for b108-b-4?  If it is ok, then it is a b108-b-4 PCB
>> problem (because the SFP module can still put out good codes even if the
>> signal into from the GigE FPGA is dead), if not it is a cabling or SFP
>> module problem.
>
> I think that this is a CRM configuration problem.  Data from this
> board arrives happily at the CBE.  I learned last week that when
> baseline boards are swpped the CRM must "re-probe" the configuration;
> perhaps this was not done.

Hmmm....that would be nice if that were the case.  The board configured 
ok, and all of the output packets had the right addresses...strange if 
it now works!

--Brent

-- 
Brent R. Carlson
Brent.Carlson at nrc-cnrc.gc.ca
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