DS125DF1610EVM: How can I enable the Eye Monitor Page in SigCon Architect?

Che-Jung Shih

Part Number: DS125DF1610EVM

Tool/software:

Hi TI support,

I don't have an RX input, so I force-enabled the signal detector to turn green.

As shown in the attached image, my eye diagram is closed. Is it necessary to provide an RX input for the Eye Monitor to work? Or is there another way to make it function? I've also attached my .cfg file for reference. Thanks!

config_register_20250826_LockCDR_6.cfg

Best regard,

Ron Shih

23 days ago

0 Drew Miller1 23 days ago

TI__Mastermind 36373 points

Hi Ron,

CDR lock is required for the eye monitor to work correctly.

Thanks,

Drew

0 Che-Jung Shih 23 days ago in reply to Drew Miller1

Prodigy 30 points

Hi Drew,

But the CDR seems to be locked, as the indicator has turned green.

By the way, can force-enabling allow the EVM board to operate without an RX input?

Best regard,

Ron Shih

0 Che-Jung Shih 23 days ago in reply to Che-Jung Shih

Prodigy 30 points

If the PRBS generator is functioning properly, would connecting TX to RX allow the Eye Monitor to operate as expected?

0 Drew Miller1 23 days ago in reply to Che-Jung Shih

TI__Mastermind 36373 points

Hi Che-Jung,

If PRBS generator is functioning properly, connecting TX to RX would allow the eye monitor to operate as expected.

Thanks,

Drew

0 Che-Jung Shih 23 days ago in reply to Drew Miller1

Prodigy 30 points

Hi Drew,

My setup for attaching the eye monitor is still not working, even though the PRBS generator is enabled.

config_register_20250826_LockCDR_7.1.cfg

0 Che-Jung Shih 23 days ago in reply to Che-Jung Shih

Prodigy 30 points

By the way, when I enable SM, the signal turns red.

0 Drew Miller1 23 days ago in reply to Che-Jung Shih

TI__Mastermind 36373 points

Hi Che-Jung,

If my understanding is correct, you are trying to generate PRBS output on TX4A and lock to the signal on RX4A. This creates a circular dependency and we do not support this configuration.

To use the PRBS generator, we recommend providing a valid input signal to the channel RX (either valid data or sub-rate clock) in order to acquire CDR lock.

Thanks,

Drew