Measurement Computing Data Translation DT3010 Series, Руководство пользователя, Страница: 123 / 232

Chapter 6
122
Analog Output Features
Two analog output (D/A) subsystems are provided on DT3010 Series boards. The first D/A
subsystem contains the majority of analog output features. The second is dedicated to
threshold triggering only (refer to
page 125 for more information on analog threshold
triggering).
This section describes the following features of the first D/A subsystem:
• Analog output resolution
• Analog output channels
• Output ranges and gains
• Output filters
• D/A output clock sources
• Trigger sources
• Analog output conversion modes
• Data formats and transfer
• Error conditions
Analog Output Resolution
DT3010, DT3010-268, DT3010/32, and DT3010/32-268 boards have a fixed analog output
resolution of 12 bits. The DT3016 board has a fixed analog output resolution of 16 bits. The
analog output resolution cannot be changed in software.
Analog Output Channels
DT3010 Series boards support two differential analog output channels (DAC0 and DAC1).
Use software to specify the channel type. Refer to
Chapter 4 starting on page 49 for
information on how to wire analog output signals to the board using the screw terminal panel.
Within each DAC, the digital data is double buffered to prevent spurious outputs, then output
as an analog signal. Both DACs power up to a value of 0 V ±10 mV. Note that resetting the
board does not clear the values in the DACs.
DT3010 Series boards can output data from a single analog output channel or from two analog
output channels. The following subsections describe how to specify the channels.
Specifying a Single Channel
The simplest way to output data to a single analog output channel is to specify the channel for
a single-value analog output operation using software; refer to
page 125 for more information
on single-value operations.
You can also specify a single analog output channel using an analog output channel list,
described in the next section.