Tektronix WFM 601A, WFM 601E, WFM 601M Trigger Modes

Reference
3–20 WFM 601A, WFM 601E & WFM 601M User Manual
Two trigger or sweep modes are available with the Eye display: OVERLAY and
10-EYE.
OVERLAY. In OVERLAY mode, all bits of a serial word are overlaid at each eye
location. Because numerous transitions for the data bits are overlaid, each eye
crossing shows the timing jitter in the video system. Figure 3–18 shows the
Overlay Eye display. Approximately three eyes are displayed and the horizontal
scale is 1 ns/div.
100 mV/DIV
OVERLAY 1 nS/DIV
10 Hz
Figure 3–18: Overlay Eye display
Trigger Modes