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100 34980A User’s Guide
4 Low Frequency Multiplexer Switch Modules
Example: Making current measurements The following command configures
channel 43 for a 34921A modules in slot 7 for dc current measurements,
triggers the internal DMM to scan the channel, and then sends the
reading to the output buffer of the 34980A. The default settings for range
(autorange) and resolution (1 PLC) are used for the measurement.
MEASure:CURRent:DC? (@7043)
Configuring a Module
Example: Configuring a module for 2-wire or 1-wire mode The following
command configures a MUX module in slot 4 for 1-wire mode. Because
you can configure only the 34923A and 34925A MUX modules (and the
34933A matrix module) for either 2-wire or 1-wire mode, an error is
generated if you send this command to a slot that does not contain one
of those three modules. If you are using terminal blocks with these
modules, be sure to use the corresponding 2-wire or 1-wire terminal
block.
SYSTem:MODule:WIRE:MODE WIRE1,4
Example: Querying the system for module Identify The following command
returns the identity of the module installed in slot 7.
SYSTem:CTYPe? 7
Querying and Clearing Cycle Count, and Resetting Modules
Example: Querying the cycle count for a relay The following command
returns the cycle count on channel 7 and channel 16 for a MUX module
in slot 1.
DIAGnostic:RELay:CYCLes? (@1007,1016)
NOTE
When using a command to configure the system, the new
configuration does not take effect until you cycle power on the
34980A.
NOTE
For the 34923A and the 34925A MUX modules, the query response
may include a suffix to indicate a 1-wire configuration. For example,
the response for the 34923A will be either "34923A" (differential
mode) or "34923A-1W" (single-ended mode).
NOTE
The 34925A will return 0 for relay counts because the FET relays on
that module are non-mechanical and have an undefined lifetime.