Analog Output; Analog Output Reference Selection; Analog Output Polarity Selection - National Instruments VXI-MIO Series User Manual

Chapter 3 Hardware Overview

Analog Output

Analog Output Reference Selection

Analog Output Polarity Selection

VXI-MIO Series User Manual
VXI-MIO-64E-1
This module supplies two channels of analog output voltage at the
I/O connector. The reference and range for the analog output
circuitry is software-selectable. The reference can be either internal
or external, whereas the range can be either bipolar or unipolar.
VXI-MIO-64XE-10
This module supplies two channels of analog output voltage at the
I/O connector. The range is bipolar or unipolar.
VXI-MIO-64E-1
You can connect each D/A converter (DAC) to this module's
internal reference of 10 V or to the external reference signal
connected to the external reference (EXTREF) pin on the I/O
connector. This signal applied to EXTREF should be between -10
and +10 V. You do not need to configure both channels for the
same mode.
Selecting a bipolar range for a particular DAC means that any data
written to that DAC will be interpreted as two's complement format. In
two's complement mode, data values written to the analog output
channel can be either positive or negative. If you select unipolar range,
data is interpreted in straight binary format. In straight binary mode,
data values written to the analog output channel range must be positive.
VXI-MIO-64E-1
You can configure each analog output channel for either unipolar
or bipolar output. A unipolar configuration has a range of 0 to V
at the analog output. A bipolar configuration has a range of -V
+V at the analog output. V
ref
the DACs in the analog output circuitry and can be either the
+10 V onboard reference or an externally supplied reference
between -10 and +10 V. You do not need to configure both
channels for the same range.
is the voltage reference used by
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3-10
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National Instruments Corporation
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