Keysight Isolated Probe Unit - Keysight PD1550A System Installation Manual

Connect Oscilloscope Probes to DUT Interface Module Accessory and Probe Installation
Figure 31 N2873A Probe to High-Side Gate Voltage V /V . and Channel A
GS,H CE,H
on Isolated Probe Unit

Keysight Isolated Probe Unit

The Link Port on the Keysight Isolated Probe Unit is not used.
All green LEDs next to individual channels should be green. There
is also a green power LED and a red LED that indicates a trigger
has occurred.
Keysight PD1550A Installation Guide 73