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Real-time Eye Diagram and Jitter Analysis
(Option)
- Set the PLL order
This oscilloscope supports first-order PLL and second-order PLL. Press PLL
Order, and rotate the multifunction knob
then press down the knob to select it. You can also press PLL Order
continuously or enable the touch screen to select it.
- Set the loop BW
Press Loop BW, then rotate the multifunction knob
numeric keypad to set the loop bandwidth.
- Set the damping factor
When PLL order is set to "2nd Order", you need to set the damping factor. It is
the damping factor of the transfer function. Press DampFactor, then rotate the
multifunction knob
factor.
The typical damping factor is 1.0 and 0.707. The former is critically damped, and
the latter is the ideal or optimal value.
3. Set the External Clock Recovery
Press RecoveryType, and rotate the multifunction knob
then press down the knob to select it. You can also press RecoveryType
continuously or enable the touch screen to select it.
Press Source, then use the multifunction knob
then press down the knob to select the source. You can also press Source
continuously or enable the touch screen to select it. The analog channel (CH1-
CH4) can be selected to be the source of the external clock.
13.1.5
To Enable or Disable the Eye Measurement Result
In the "Eye" setting menu, press Result continuously to enable or disable the display
of the eye measurement result. When it is enabled, the statistical results of the eye
measurement data will be displayed at the upper-left corner of the screen, as shown
in the following figure. You can enable the touch screen, and drag the statistical
results to any place where you want to put it for view on the screen.
216
to select the order number and
or use the pop-up numeric keypad to set the damping
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or use the pop-up
to select "Explicit", and
to select the desired source, and
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