DS90UB948-Q1: DS90UB948-Q1

Hello,

If the lock signal is low, there is either too much loss or signal reflection on the link for the 948 to recover the clock and serial data from the stream.

What serializer are you using and what cable type and length is being used?

Best,

Jack

Our products use 949 and 948. At present, the clock pin of 948 is low, the port 0 is used in 949, and the line is coaxial single-ended with a length of 2.5 meters. The schematic diagram is as follows

948：

949：

The board connection is shown

May I ask why the clock signal is low and how to troubleshoot the problem? Thank you!

Our TI technical support has not responded to the email for two months. If it is not suitable for discussion in the public forum, can I add you as a friend and send an email to you separately? Our project is at a standstill now and we urgently need help. Could you please provide us with a contact email? Looking forward to your reply!