Hi Sir
Customer use SN75LVCP601 for sata2 but fail in eye pattern test.
EQ1/2 is NC, DEW1/2 is 0, below is the test result for DE1/2 set to 0/-2/-4.
So what is your comment for this?
PS: sata3 is no any problem.
Eric Lo
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Hi Sir
Customer use SN75LVCP601 for sata2 but fail in eye pattern test.
EQ1/2 is NC, DEW1/2 is 0, below is the test result for DE1/2 set to 0/-2/-4.
So what is your comment for this?
PS: sata3 is no any problem.
Eric Lo
Hi Eric,
The SATA2 waveforms look normal. The output DE settings only allow for a few choices to optimize the transmit equalization. In this case the DE = -2 setting provides the best overall result. Even though the amplitude is slightly above to top/bottom mask area I would consider this result to have robust system performance.
Regards,
Lee
Hi Lee
Customer want to pass the test spec so do you have any suggestion for let amplitude under to top/bottom mask area?
BRs
Eric Lo
Hi Eric,
There are no device adjustments to make which can alter the overall VOD. If you are using coaxial cables to the oscilloscope for measurement I would try to connect several pairs to increase the loss slightly prior to the scope inputs.
Regards,
Lee