Digital Channels 7
Keysight InfiniiVision 3000T X-Series Oscilloscopes User's Guide 133
 
4 Connect a grabber to one of the probe leads. (Other probe leads are omitted 
from the figure for clarity.)
5 Connect the grabber to a node in the circuit you want to test.
6 For high-speed signals, connect a ground lead to the probe lead, connect a 
grabber to the ground lead, and attach the grabber to ground in the device 
under test.