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314 Keysight 34970A/34972A User’s Guide
Low-Level Signal Multiplexing and Switching
Low-level multiplexers are available in the following types: one-wire,
2-wire, and 4-wire. The following sections in this chapter describe each type of
multiplexer. The following low-level multiplexer modules are available with the
34970A.
– 34901A 20-Channel Armature Multiplexer
– 34902A 16-Channel Reed Multiplexer
– 34908A 40-Channel Single-Ended Multiplexer
An important feature of a multiplexer used as a DMM input channel is that only
one channel is connected at a time. For example, using a multiplexer module and
the internal DMM, you could configure a voltage measurement on channel 1 and a
temperature measurement on channel 2. The instrument first closes the channel 1
relay, makes the voltage measurement, and then opens the relay before moving
on to channel 2 (called break-before-make switching).
Other low-level switching modules available with the 34970A/34972A include the
following:
– 34903A 20-Channel Actuator
– 34904A 4x8 Two-Wire Matrix
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