Keysight 34921A-34925A User’s Guide 9
Low Frequency Multiplexer Modules
This User’s Guide covers the following five plug-in modules for the Keysight
34980A Multifunction Switch/Measure Unit:
Multiplexer Module Capabilities
Each multiplexer (MUX) module features two banks of channels, providing broad
multiplexing and measurement capabilities. Briefly:
– You can connect a MUX to an external instrument, and/or switch multiple
analog signals to the internal DMM.
– With the 34921A, 34922A, 34923A, and the 34924A modules, you can close
more than one channel in each bank simultaneously (N:1 configuration).
– Since the 34925A module is protected with overvoltage circuitry, you can close
only one channel in each bank at one time (1:N configuration).
– You can connect multiple MUXes to the built-in Analog Buses, which allow you
to scan as many as 560 2-wire (differential) channels or 640 1-wire
(single-ended) channels in one 34980A mainframe.
34921A 40-channel armature multiplexer w/low thermal offset
34922A 70-channel armature multiplexer
34923A 40/80-channel reed multiplexer
34924A 70-channel reed multiplexer
34925A 40-channel optically isolated FET multiplexer
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