Agilent 4155B/4156B User’s Guide Vol.2, Edition 5 3-5
Measurement Functions
Stress Force Function
Switching Channels Connected to DUT
The 4155B/4156B can control Agilent 16440A SMU/Pulse Generator Selector to
automatically switch units that are connected to a DUT pin. You set up this
automatic control on the STRESS: CHANNEL DEFINITION screen.
For example, the DUT pin is connected to a PGU for stress force when Stress
front-panel key in the MEASUREMENT key group is pressed, then connected to an
SMU for measurement when Single front-panel key is pressed.
For details about how to control the 16440A selector, refer to “SMU/PG Selector
Control” on page 3-46.
External Stress Source
The following trigger functions allow you to force stress from more than 4 channels
by using external pulse generators, voltage sources, or current sources.
• gate trigger while stress is forced
The 4155B/4156B can output a gate trigger while stress channels are forcing
stress. For details about this gate trigger, refer to “Trigger Function” on page
3-39.
• gate trigger of PGUs
The output trigger terminal of PGUs (41501A/B) can output a gate trigger to
external pulse generators. So, use this function if you need more than two ac
stress channels.
For example, you can use Agilent 8110A pulse generator to force ac stress by
using this trigger.
PGU outputs a gate trigger that is synchronized with pulse output. For details of
the trigger signal, refer to “Trigger Output” on page 3-42.
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