Transceiver output characteristic

[sung_chul]

Hi-

1. Question

In Transceiver Native PHY Intel Arria 10/Cyclone 10 FPGA IP,

In 2GHz, Well done

But 5Ghz, 101010 Voltage Swing Very low voltage

below fig show 10101010 ans 11001100, 11101110 

2. Question

In assignment editor, I have "Transmitter voltage swhing" amend to a different value

values 30 is OK!

16, 13 is OK!

But 1-8 is not okay.

This value is compile error(Quartus Pro 18.1)

I was not tested all values(1~31)

[Kshitij_Intel · Accepted solution]

Hi Lee,

1. It looks like, you are having insertion loss on your channel. Insertion loss generally increases with frequency. To overcome high insertion loss use pre-emphasis.
2. During characterization 1-8 is probably not going to open the eye that's why we have disabled it.

In general to get the better results, reduce the voltage swing & increase the pre-emphasis.

Majorly 2 things effects on the insertion loss.

1. PCB material
2. Width of traces

Also, please go through the guidelines.

https://www.intel.com/content/www/us/en/support/programmable/support-resources/signal-power-integrity/signal-integrity-support.html

Thank you

Kshitij Goel

[sung_chul]

Hi K**bleep**ij

Thank you!

Your advice has been very helpful in understanding "Transceiver IP."

Sincerely!