3
Features and Functions
134
Keysight 34980A Mainframe User’s Guide
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. 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
