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AT4039EML
|User Manual
Figure 13: BER Graphs
Histogram Analysis
The histogram is the tool of choice to troubleshoot the link. You can think of it as a
scope built into the receiver and it works even if you do not have pattern lock. For both
NRZ and PAM signals, the histogram graph is shown as follows:
Figure 14: PAM Histogram
The thinner the peaks the better the performance of the PAM signal and the less
the jitter. These peaks can be enhanced using the pre/post-emphasis available.
22|P a g e
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