User`s guide

8-18 Agilent 4155C/4156C User’s Guide Vol.2, Edition 6

Support Functions

R-BOX Control

Agilent 16441A R-Box must be used for applications which need to connect a series

resistor between SMU and DUT. For example, the R-Box is effective for the DUT

protection. If sudden voltage change occurs at DUT, excessive current flows to the

DUT, and it may damage the DUT without the R-Box. In other case, you may want

to measure negative resistance characteristics. This application needs series resistor

because SMUs cannot measure negative resistance.

The 4155C/4156C automatically compensates for voltage drop of the series

resistance value. So, the GRAPH/LIST screen group show the compensated data.

For details of the 16441A R-Box, refer to Agilent 16441A R-Box User's Guide.

Resistance Value

The 16441A R-Box provides two sets of the series resistors. So you can connect two

SMU channels to the R-Box. Resistance values of resistors are listed below:

•1 MΩ

• 100 kΩ

•10 kΩ

•0 Ω

You can select the resistance values on the 4155C/4156C setup screen. The LEDs on

the 16441A R-Box indicate the present resistance value.

Connections

Following table is the parts list of cables for connecting the 16441A R-Box.

Agilent Model or Part Number Description

04155-61610 Control Cable 1.5 m

04155-61609 Control Cable 3.0 m

04155-61605 Triaxial Cable 0.4 m

16493K-001 Kelvin Triaxial Cable 1.5 m

16493K-002 Kelvin Triaxial Cable 3.0 m