Agilent Technologies U2300A Series User Manual page 61

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U2300A Series USB DAQ User's Guide
Polling mode
This is the easiest way to acquire a single A/D data. The
A/D converter starts converting one reading whenever the
dedicated SCPI command is executed. This mode is well
suited in applications that needs to process A/D data in real
time. In this mode, the timing of the A/D conversion is fully
controlled by the software. However, it is difficult to control
the A/D conversion rate.
In polling mode, the properties of the measured signal
should be defined. The properties are range, polarity
(unipolar/bipolar) and signal type. Signal type consists of
RSE, NRSE and DIFF.
The default polarity is bipolar. The SCPI command for
performing the polling mode measurement is under
MEASure subsystem.
For more information on MEASure subsystem, refer to the Agilent U2300A
Series Multifunction USB Data Acquisition Programming Guide .
Continuous mode
Continuous mode is divided into two types, single- shot and
continuous acquisition. In single- shot acquisition, the data is
acquired at a specified sample points and processed once.
On the other hand, the continuous acquisition allows you to
acquire data continuously until a STOP command is sent.
The SCPI commands below are used to start the acquisition
process:
• Single- shot acquisition:
DIGitize
• Continuous acquisition:
RUN
Features and Functions 3
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