Hi
I have a problem with a design I made with the DS92lv18 serializer/deserializer.
I will use this IC to make a serializer / deserializer via a fiber link using 2 identilcal boards. One in each end of the fibre, So data sent from one board will be outputtet on the other board and vice versa.
Right now i am testing making a loopback electrically.
The circuit itself works fine until i add the fiber link then wierd things happens. It looks like a timing issue.
when the loopback is electrical it works. Data getting into the board on a specific input (1 of 18) comes out on the correct output.
For instance if a 100khz square wave is inserted on input 3 I measure a 100khz on output 4. and so on.
When I replace the electrical link with a fiber link. the signal on input 3 is also measured on output 4 and 5 and not only on output 3. I am not sure what this is?
The lock signal is stable and shows a valid link?
I have chased this problem for a while and am running out of ideas. Please help.
Thanks
I have added a pdf of my design for info.
diagram MUX18 - 181019-01C.pdf
I have had contact with TI support - case number CS0110106 in December 2019
Thanks in advance
