3-50 Agilent 4155B/4156B User’s Guide Vol.2, Edition 5
Measurement Functions
R-BOX Control
Setups
You set resistance values in the SERIES RESISTANCE column on the
CHANNELS: CHANNEL DEFINITION screen.
You can set resistance values for the following SMUs:
• SMU1 (to CH1 terminal of R-Box)
• SMU2 (to CH2 terminal of R-Box) if the 41501A/B SMU/Pulse Generator
Expander is not installed or does not have an HPSMU
• SMU5 (to CH2 terminal of R-Box) if the 41501A/B is installed and has an
HPSMU
If you connect the 16441A R-Box to the SMUs described above, the 4155B/4156B
automatically compensates for voltage drop of the resistance values. So, the
measured data displayed on the screen and the results of user function are the
compensated data.
For the following SMUs, you can set 0 W only:
• SMU that is set to standby channel
• SMU that is set to COMMON output mode
If the 4155B/4156B is on and an emergency occurs, the resistance value changes to
1 MW.
There is a possibility that the 4155B/4156B cannot perform measurement
circumstances. If you measure device characteristics including negative resistance
over 1 MW, there is a possibility that they cannot measure it.
NOTE If you connect the R-Box to SMUs other than described above, resistance values are
not compensated for automatically. You need to compensate for the resistance
values manually, such as by using a user function or calculation in the IBASIC
program.
NOTE To perform automatic compensation of R-Box, the 4155B/4156B automatically uses
1 SMU to measure current through the R-Box.
So if the SMU forces voltage, and monitors voltage value or use the monitored value
for user function calculation, the 4155B/4156B need additional 1 measurement
channel other than the measurement channels defined in the CHANNELS:
CHANNEL DEFINITION screen.
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