User`s guide

6 Agilent 16440A User’s Guide, Edition 5
User's Guide
Operation
• Switching state
The switching state of a channel is indicated by the green LEDs on the selector
front panel. This table shows the relation of the relays and the LEDs for each
switching state.
The “PGU open” state is useful if a lot of switching needs to be performed.
When the switching state changes from “PGU on” to “PGU open”, only the
semiconductor relay switches. This reduces the amount of times the mechanical
relay is switched. The semiconductor relay has a much longer switching life than
the mechanical relay.
States CH 1 and CH 3 CH 2 and CH 4
All open
SMU on
PGU on
PGU open