Anritsu BERTWave MP2100B, Operation Manual, Page: 144 / 382

Chapter 5 Generating Pulse Signal
5-12
Improving PPG phase differences by synchronizing clock with Ch1
When Reference Clock is set to Internal at the Option 012 or 014, the data
rates of PPG1 and PPG2 become the same but there is phase error in the
data. Although phase error between PPG1 and PPG2 has no effect on the
measurement results when measuring bit errors, sometimes non-existent
jitter may be observed at waveform monitoring.
Setting the Ch2 Reference Clock setting to Ch1 will improve the phase
difference for this data.
Use the clock synchronized to the PPG1 data as the oscilloscope trigger to
display the monitored PPG2 Eye Pattern as follows.
Figure 5.4-1 Eye Pattern Monitoring
Sync Out
PPG2
DataOut
Ch A In
Trigger Clk In
Set Sync Output to PPG1_1/4 Clk.