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Observer
Observer
7,877 Views
Registered: ‎05-06-2014

[GTZ] CTLE tunning is not done

Dear all:

 

I am using VC7222 board, and I use vivado 2014 to generate an GTZ instance with 4 lanes running at 28.05Ghz.

 

I connect all the tx to corresponding rx diff pair directly with a single BullEye connector, so there should not be any further signal attenuation.

 

I connect all the txusrclk and rxusrclk to led and confirm that their freq are all 175.3Mhz.

 

I connect all the txrdy, rxrdy, txresetdone and rxresetdone to chipscope, and find that they are all 1.

 

But the prbs checking fail on all 4 lanes, and I find that the CTLE tunning is not done, so is this the reason for prbs checking failure? and How should I work around it?

 

Shen

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Moderator
Moderator
7,863 Views
Registered: ‎02-16-2010

Are you using GT wizard example design to test PRBS? can you provide the attribute settings done to do this test?
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