[SI-LIST] Re: PCI Express CLB compliance waveform

  • From: David Palmer <dpalmer@xxxxxxxxxxxxx>
  • To: Peter zhu <yonghui.sky@xxxxxxxxx>
  • Date: Tue, 10 Feb 2009 11:40:08 -0800

Is channel 1 terminated?

Peter zhu wrote:
> Not sure what your generating compliance test waveform means. PCI-E eye
> diagram compliance test can be done when PCI-E device is in working, and no
> special compliance test waveform needed.
> PCI-E device has negotiation process during hardware connection, if
> connection can not be setup, the negotiation process will continue, so the
> negotiation waveform will interrupt for a while every several seconds. it
> may lead to fail to generate eye-diagram.
> But If your PCI-E device can work in your system, it means hardware
> connection is successful, you can do compliance test. If you still can not
> got a valid eye-diagram, please check your scope set up, such as, if
> Recovery Clock for Data selected, and appropriate PLL algorithm setup, etc.
> Peter zhu
> Emerson Network Power
> 
> 
> 
> On Sat, Jan 31, 2009 at 3:58 AM, Joel Brown <joel@xxxxxxxxxx> wrote:
> 
>> I have a PCI Express CLB plugged into the PEG slot on my system.
>> My understanding is that when this board is installed it is supposed to
>> invoke the system to generate a compliance test waveform.
>>
>> I am not sure what this waveform is supposed to look like but I don't think
>> what I am getting is the right one because I am not getting a valid eye
>> diagram on the scope.
>>
>> The system has Intel 965 chipset. Is there anything special I have to do to
>> invoke the system to generate the proper waveform?
>>
>>
>>
>> Thanks - Joel
>>
>>
>>
>>
>>
>>
>>
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> 
> 
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-- 
David Palmer
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