Idiomas disponibles
Idiomas disponibles
4 Measurement Tutorials
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
DAQ970A/DAQ973A.
– DAQM900A 20-Channel FET Multiplexer
– DAQM901A 20-Channel Armature Multiplexer
– DAQM902A 16-Channel Reed Multiplexer
– DAQM908A 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 can 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).
– DAQM903A 20-Channel Actuator
– DAQM904A 4×8 Two-Wire Matrix
One-wire (single-ended) multiplexers
On the DAQM908A multiplexer, all of the 40 channels switch the HI input only, with a common LO for the module.
Only one channel can be closed at a time; closing one channel will open the previously closed channel.
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Keysight DAQ970A/DAQ973A User's Guide
