DS110DF410: Interface forum

Hi Xenon,

Increasing CDR bandwidth would enable the CDR to track more jitter in the received signal.  This might help if the issue with TLR is related to jitter.  It would not hurt to try this.  With that said, the TLR limitation is typically a result of the VCO frequency changing over temperature for a set VCO control voltage.  This makes it more challenging to track the signal since the VCO frequency is changes over temperature at a set control voltage.

Thanks,
Drew

Hi Xenon,

Increasing the bandwidth of the CDR will enable the CDR to better track the signal.  However, I'm not sure if this will have a significant impact on the TLR of this device since I believe the limiting factor is most likely the change in VCO frequency that occurs over temperature.

With that said, it would not hurt to try increasing CDR bandwidth to see if it increases the TLR of the retimer in your system.

Thanks,

Drew