User`s guide

1
Agilent 34980A Multifunction Switch/Measure Unit
Mainframe User’s Guide
Agilent Technologies
1
Introduction to the 34980A
This chapter provides an overview of a computer- based
data acquisition and measurement control system using the
Agilent 34980A Multifunction Switch/Measure Unit and
typical plug- in modules.
Data Acquisition Overview 2
Measurement Software 3
Data Acquisition Circuitry 5
Plug-In Modules 6
System Cabling 6
Transducers and Sensors 7
Alarm Limits 7
Signal Routing and Switching 8
Switching Topologies 8
Multiplexer Switching 8
Matrix Switching 9
General Purpose Switching 9
RF and Microwave Switching 10
Measurement Input 11
The Internal DMM 11
Signal Conditioning, Ranging, and Amplification 11
Analog-to-Digital Conversion (ADC) 12
Main System Processor 12
Scanning 13
Scanning With External Instruments 14
The Digital Modules 16
Digital Input 16
To t a l iz e r 17
Control Output 18
The Digital Modules 18
Digital Output 18
Voltage (DAC) Output 19
The Actuator / General-Purpose Switches 20