Low-Level Signal Multiplexing And Switching - Agilent Technologies 34972A User Manual

Chapter 7 Tutorial

Low-Level Signal Multiplexing and Switching

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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