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

[Brent Carlson]

Right.  Now I think I remember...maybe it is at the switch end where the 
switch must ping the board...I recall James saying.
Brent

On 08/06/2011 4:54 PM, Brent Carlson wrote:
> 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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