DS125DF1610EVM: Interface forum

Hi to all,

We have contacted the TI E2E support team on this matter earlier.

We're experiencing difficulties to operate the EVB.

We are communicating with EVB via the SigCon SW.

Our design goal is to operate the EVB as a multi BER testers.

Our problems:

1. We tried to turn on the PRBS generator (within the DS125DF1610EVB). The PRBS signal was not observed at Tx output (TX_5A_P). 
2. We connected the REF_CLK (single ended source) to see if it's being detected at the CLK_MON output (J100) - without success. Please note that we follow the guide line per section 7.3.7 in the data sheet of DS125DF1610

Evaluation conditions:

1. Supply voltage 2.5V 
2. Current consumption was 134mA
3. REF_CLK signal was 25MHz
4. Signals were monitored by external scope
5. Temperature (~ 25C).

We would like to receive the following information:

1. What should be the stored data in in registered 0x02[6:5], 0x0B[4] and 0x04[7] so that the CLK_MON would be observed in the CLK_MON outputs? Do we have to apply received data to the receivers or to set other registers, so that the REF_CLK could be observed at CLK+MON? Do we have to apply REF_CLK signal (at all) in order to turn on the PRBS generator? 
2. We tried to operate the PRBS generator using "High level Page" of the GUI. What else must be activated/turn-on in order to see the PRBS signal at the Tx output?
3. As mentioned above we intend using the EVB as a BERT namely transmitting the PRBS signal (generated by DS125DF1610EVB) via a tested system and using the PRBS checker (on the DS125DF1610EVB). Is it feasible using the DS125DF1610EVB in such application? Any known problem?

Hopefully the answers to the questions above will speed up the our evaluation.  Please note that we intend to use this EVB in several of our products.

Your prompt responses will be appreciated a lot. 

Thanks,

Motti