DS90UB928Q-Q1: questions about DS90UB928Q-Q1

Hello Chen,

chen zhang said:

1.How many steps of the  Equalization can  DS90UB928Q-Q1 supports?

The 928 supports 14 gain steps 

chen zhang said:

2.whether the DS90UB928Q-Q1 supports Pre-Emphasis and De-Emphasis?

928 is a receiver for the high speed forward channel signal so things like pre-emphasis/de-emphasis would be coming from a remote SER device. The low speed back channel output signal from the 928 does not have de-emphasis/pre-emphasis 

chen zhang said:

3.How to configure the PRBS and how to test the bit error rate?

You can reference 8.3.9 Built In Self Test (BIST) from the 928 datasheet for info on how to run PRBS error error rate testing

chen zhang said:

Can you provide testing tools?

You can also use MAP in order to evaluate link quality:

https://www.ti.com/lit/pdf/snlu243

https://www.ti.com/lit/pdf/snla301 

chen zhang said:

4. How to test and guarantee the DC-balanced data of FPD LINK data?

This is already covered by the FPD-Link protocol itself. The FPD-Link protocol prevents baseband wander through means of scrambler and DC balance bit insertion to the channel automatically. You can learn more generally about the FPD-Link III protocol here:

https://www.ti.com/video/series/ti-precision-labs-fpd-link.html 

Best Regards,

Casey