LMH1218 - How to display eye open monitor (EOM) in error hit density mode.

**Edited response**

Hi Kawai-san,

I realize that my initial response came under the assumption that you were using SigCon Architect, so I misunderstood the question. Please see corrected response below:

Figure 7: Perform an EOM capture to obtain the raw hit count (just as you have suggested). Make everything above a certain threshold one color and everything else another color.

Figure 8: To acquire an eye similar to Figure 8, you can perform a first-derivative of the original EOM data.To do this, perform an EOM capture, which results in a (64 phase step) x (64 voltage step) matrix of hit count values. From there, generate a 64 phase step by 63 voltage step matrix, where each value of the matrix is computed by taking the absolute value of the difference between a given hit count and the hit count of the adjacent voltage step. Make everything below a certain threshold (for example, less than 10) black, and everything above this threshold colored on a color scale. 

SigCon Architect automatically performs both the Error Hit Count (Figure 7) and Error Hit Density (Figure 8) described above.

Thanks,

Michael

Hello Michael-san,

Thank you for your reply. What I see above/below the crossing point is that error hit count is something like 3500.

It is not a small number like ten to a few tens.

I will send you the customer data via email, so could you please check ?

Thanks in advance.

Best Regards,

Kawai

Hello Michael-san,

Thank you for the information. I understood how SigCon builds the EOM in Error Hit Density mode.

Best Regards,
Kawai