Agilent 34980A  Multifunction Switch/Measure Unit *34980-90005*

2-Wire Versus 1-Wire Mode
Features and Functions 3
You can configure the 34923A, 34925A, and 34933A modules for 2- wire
(differential) or 1- wire (single ended) measurements. Detailed instructions
for these configuration options can be found in the individual User’s
Guides shipped with the modules. 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
Agilent 34980A Mainframe User’s Guide 95