Now we see an erroneous runt in the signal. 
To capture it, follow the steps below.
10. Press the side-bezel Set to Auto button 
to turn off infinite persistence.
11. Press FastAcq lower-bezel button and 
then press FastAcq side-bezel button to 
turn off FastAcq.
12. Press trigger Menu, select Type Edge 
bottom bezel button, use Multipurpose 
a to scroll down to Runt.
13. Press Thresholds lower-bezel button and 
adjust High to approximately 2.00 V 
using Multipurpose a, adjust Low to 
about 1.00 V using Multipurpose b.
14. Press Mode lower-bezel button. Press 
Normal side-bezel button.
15 Press the Menu Off button twice to 
remove the menus. You should be 
triggering on the runt signal.
Figure 6. 
www.tektronix.com/mdo300014
MDO3000 Series Oscilloscope
Demonstration Guide