User`s guide

7-46 Agilent 4155C/4156C User’s Guide Vol.2, Edition 6
Measurement Units and Functions
Operation States
Operation States
The 4155C/4156C has the following four operation states.
• “Idle State”
• “Measurement State”
• “Stress Force State”
• “Standby State”
Idle State
In the idle state, the 4155C/4156C is not doing anything: no measurements, forcing
current or voltage, forcing stress.
An 4155C/4156C is in the idle state after applying power. In this state, output
switches of all the measurement units are on, and all of the units output 0 V. In this
state, you can modify any setting items on the setup screens.
The following are the conditions of each unit and accessories in idle state.
SMU 0 V output at 20 V range, and 100 μA compliance at 100 μA
range
VSU 0 V output at 20 V range
PGU 0 V dc output at 20 V range (output impedance: LOW)
GNDU 0 V output
16441A R-Box 0 Ω is connected.
16440A selector switching condition is SMU.
Measurement State
In the measurement state, an 4155C/4156C performs sampling or sweep
measurements. The output switches are off for units that do not have entries in the
CHANNELS table of the CHANNELS: CHANNEL DEFINITION screen.