Agilent Technologies 34901A User Manual page 57

Chapter 3 System Overview
Data Acquisition System Overview
Plug-In Modules
The 34970A offers a complete selection of plug-in modules to give you
high-quality measurement, switching, and control capabilities.
The plug-in modules communicate with the floating logic via the internal
isolated digital bus. The multiplexer modules also connect to the
internal DMM via the internal analog bus. Each module has its own
microprocessor to offload the mainframe processor and minimize
backplane communications for faster throughput. The table below
shows some common uses for each plug-in module.
For more information on each module, refer to the module sections in
chapter 4, starting on page 163.
Model Number
34901A 20-Channel Mux with T/C
Compensation
34902A 16-Channel Reed Mux with T/C
Compensation
34908A 40-Channel Single-Ended Mux
with T/C Compensation
34907A Multifunction Module
34901A 20-Channel Mux with T/C
Compensation
34902A 16-Channel Reed Mux with T/C
Compensation
34908A 40-Channel Single-Ended Mux
with T/C Compensation
34904A 4x8 Matrix Switch
34905A
Dual 4-Channel RF Mux (50
34906A
Dual 4-Channel RF Mux (75
34903A 20-Channel Actuator
34907A Multifunction Module
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Module Name
Measurement Input
Scanning and direct measurement of
temperature, voltage, resistance, frequency,
and current (34901A only) using the
internal DMM.
Scanning and direct measurement of
temperature, voltage, and resistance using
the internal DMM.
Digital Input, Event Counting.
Signal Routing
Multiplexing of signals to or from external
instruments.
32 Crosspoint Matrix switching.
Ω
Ω
50
)
Ω
Ω
75
)
Control Output
General-purpose switching and control
using Form C (SPDT) switches.
Digital Output, Voltage (DAC) Outputs.
Common Uses
high-frequency applications (< 2 GHz).
high-frequency applications (< 2 GHz).