Tool/software:
Hi team,
I'd like to know about the CDR.
1. The CDR register of LMH0397 was changed to increase the loop bandwidth, but the performance could not be improved.
2. When inputting HD pathological signals to LMH0397, it can only support a maximum distance of 180m (5CFB cable).
3. When the HD pathological signal is input to LMH0397 with the CDR bypassed, its output is connected to LMH0397 and reclocked by the built-in CDR, the maximum length of the signal is 250m.
When reclocked with the built-in CDR, it could handle a maximum length of 250m (5CFB cable).
(The equalizer of LMH0397 in the next stage was not used.)
Based on facts 2 and 3 above, it seems that the built-in CDR in LMH0397 is affected by the equalizer.
If so, is there any way to prevent the equalizer from affecting the CDR?
Or is there any other way to improve the characteristics of the CDR?
If you need to have an INTERNAL conversation, please direct e-mail or private message.
BR,
Kengo.
