Output Ranges And Gains; Output Trigger; Output Clock; Output Conversion Modes - Data Translation DT9812 Series User Manual

Chapter 5

Output Ranges and Gains

The DT9812-2.5V module provides a fixed output range of 0 to 2.44. The DT9812-10V,
DT9812-10V-OEM, DT9812A, DT9813-10V, DT9813A, DT9814-10V, and DT9814A modules
provide a fixed output range of ±10 V.
Through software, specify the range for the entire analog output subsystem (0 to 2.44 V for the
DT9812-2.5 V module or 10 V for the DT9812-10V, DT9812-10V-OEM, DT9812A, DT9813-10V,
DT9813A, DT9814-10V, and DT9814A modules), and specify a gain of 1 for each channel.

Output Trigger

A trigger is an event that occurs based on a specified set of conditions. The modules support a
software trigger for starting analog output operations. Using a software trigger, the module
starts outputting data when it receives a software command.
Using software, specify the trigger source for the D/A subsystem as a software trigger.

Output Clock

When in continuous output mode, described on
channels simultaneously using the internal clock on the module.
Using software, specify the clock source for the D/A subsystem as internal and specify the
frequency at which to update the analog output channels.
For the DT9812-10V, DT9812-10V-OEM, DT9813-10V, DT9814-10V, the output frequency
ranges between 30 Hz and 50 kHz.
For the DT9812A, DT9813A, and DT9814A, the output frequency ranges between 30 Hz and
75 kHz.
Note: The output clock frequency that you specify is frequency at which both analog output
channels are simultaneously updated.
To avoid overrun and underrun errors, it is recommended that you do not run both the A/D
and D/A subsystems at the same time using the maximum frequencies.

Output Conversion Modes

The DT9812, DT9813, and DT9814 Series modules support the following output conversion
modes:
• Single-value output operations
• Continuous output operations
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page 67, you can update both analog output