System Overview
This section provides an overview of a computer-based system and describes the parts of a data acquisition
system.
Data Acquisition System Overview
Signal Routing and Switching
Measurement Input
Control Output
Data Acquisition System Overview
You can use the Keysight DAQ970A as a stand-alone instrument, but there are many applications where
you will want to take advantage of the built-in PC connectivity features. A typical data acquisition system is
shown below:
The configuration offers the following advantages:
l You can use the DAQ970A to perform data storage, data reduction, mathematical calculations, and con-
version to engineering units. You can use the PC to provide easy configuration and data presentation.
l You can remove the analog signals and measurement sensors from the noisy PC environment and elec-
trically isolate them from both the PC and earth ground.
l You can get a single PC to monitor multiple instruments and measurement points while performing other
PC-based tasks.
DAQ970A logic circuitry
As shown below, the logic circuitry for the DAQ970A is divided into two sections: earth-referenced and float-
ing. These two sections are isolated from each other in order to maintain measurement accuracy and
repeatability. See Noise Caused by Ground Loops for further details on ground loops.
Keysight DAQ970A User's Guide 53
3 Features and Functions
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