Keysight U3402A - The Rear Panel at a Glance; Figure 1-9 Rear Panel

Getting Started Tutorial 1
Keysight U3402A User’s and Service Guide 33
The rear panel at a glance
Figure 1-9 Rear panel
Line voltage fuse
selection table
AC power
connector
AC line fuse
Chassis
ground lug
RS232 interface connector
(For calibration use only)
AC line
voltage selector