EXFO PSO-100 Series Optical Sampling Oscilloscopes - Manual (Page 55)

Setting up and Using the Optical Sampling Oscilloscope
Optical Sampling Oscilloscope 47
Using the Clock Input
In this example, we have chosen to view two clock periods at 10 GHz,
which makes eight eyes at 40 Gb/s. You can also view patterns in external
clock mode, just switch to Pattern. Again, make sure that the pattern
length, the signal frequency, and also the sub-rate clock are correct. By
clicking the right button and select Signal/clock delay, you can introduce a
delay between the data and the clock, which is useful for centering eye
diagrams on the screen and perform measurements on a specific eye
diagram, since all measurements are performed on the first eye diagram as
shown in Eye Mode Measurement Example on page 73.
To display the clock trace on-screen:
1. From the main window, select the Setup menu, then View.
2. Select Clock trace.
To introduce a time delay between the data and the external
clock:
Right-click when in the main window, then select Signal/Clock delay.