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HBhat2's avatar
HBhat2
Icon for Contributor rankContributor
6 years ago

Transceiver Toolkit Loopback modes

Hi, I am using transceiver toolkit on Stratix 10 SoC Dev kit to check the transceiver line performance. Under Loopback mode option I am seeing 4 options Off Metallic Reverse Serial Serial Lo...
CheepinC_altera's avatar
CheepinC_altera
Icon for Regular Contributor rankRegular Contributor
6 years ago

Hi HPB,

As I understand it, you have some inquiries related to the loopback option as in the TTK. Please see my response as following:

1. reverse serial - sorry for the confusion. There seems to be no specific detail on whether it is pre or post CDR. However, based on my understanding, it is pre-CDR loopback. You may try to dump out the register value of the Native PHY and cross check with those mentioned in section "A.4.4. Loopback" of the S10 L and H tile XCVR PHY user guide.

2. metallic - Sorry as there is no specific detail that I could find on this. Based on my experience, I will use serial loopback. Sorry for the inconvenience.

Please let me know if there is any concern. Thank you.

Best regards,

Chee Pin