Agilent Technologies Switch/Measure manual Wire Versus 1-Wire Mode

Features and Functions 2

2-Wire Versus 1-Wire Mode

You can configure the 34923A, 34925A, and 34933A modules for 2- wire (differential) or 1- wire (single ended) measurements. If you change the module configuration, you must cycle power on the 34980A to activate the new setting.

•To determine whether the module is in the 2- wire or 1- wire configuration, check the module description shown on the front panel when the module is selected, or send the SYSTem:CTYPe? or

SYSTem:CDEScription? command. For example, the SYSTem:CTYPe? response for the 34923A will be either “34923A” (differential mode) or “34923A- 1W” (single- ended mode).

•If you are using terminal blocks with these modules, be sure to use the corresponding 2- wire or 1- wire terminal block.

•The module configuration is stored in non- volatile memory on the module and does not change when you remove the module from the mainframe, after a Factory Reset (*RST command), or after an Instrument Preset (SYSTem:PRESet command).

Front Panel Operation: Module (Configure) > MODE NEXT POWER-ON

After selecting the 2- wire (“WIRE2”) or 1- wire (“WIRE1”), you must cycle power on the 34980A to activate the new setting.

Remote Interface Operation: The following command selects the 1- wire configuration on the module in slot 3. The new configuration will not take effect until you cycle power on the 34980A.

SYST:MOD:WIRE:MODE WIRE1,3

34980A User’s Guide 27