15
Oscilloscope Measurements
While capturing the eye, a user can perform measurements by
simply clicking the corresponding buttons: Top, Base, Min, Max,
Fall time, Rise time, Peak to Peak, Eye Amplitude, Eye Height, Eye
Width, Jitter, and the crossing percentage. The
Check All
text box
can be selected to capture all the measurements in one action.
When multiple DSOs are connected, and after drawing all the
eyes or patterns, the measurements are displayed for all DSOs
down the screen in the tables.
Markers
This feature by default is off; in order to use it, switch it to on by choosing the
On
radio button,
under the
Markers
group box.
A pair of movable markers in both X-axis and Y-axis is displayed. The horizontal and vertical
markers help bound the measurement region by giving the difference between the 2
horizontal and vertical markers.
The results are displayed in the top of the graph. Picosecond or UI is the unit of the X axis; mV
is the unit of the Y axis.
Figure 14: DSO Markers
First select the marker to be moved; it should be highlighted in yellow
Drag the markers to the required location
The marker values displayed in the textboxes bottom left can be used to manually specify
the marker positions
Markers help verify horizontal and vertical measurements, such as jitter, eye width, eye
height, and mask margins. They can be dragged manually to view the delta or difference
between 2 markers.
