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Chapter 2: Functional Description
The AOB8/16 and AOB16/16 are full-size cards that can be installed in any long I/O slot of PC-AT
class computers. They contain either 8 or 16 double-buffered digital-to-analog converters (DAC)
and provide 8 or 16 independent analog output channels of 16-bit resolution. Each analog output
channel can be configured for ranges of:
0V to +5V
0V to +10V
-5V to +5V
-10V to +10V
The Option Selection section of this manual contains a description of how to make these selections.
The analog output channels have a double-buffered input for single-step update and each is ad-
dressed at its own I/O location. The DACs have a two-byte (8LSB's+8MSB's) loading structure.
The analog outputs can be updated either independently or simultaneously.
Finally, the AOBx/16 contain automatic reset circuits which reset both D/A outputs to all zeroes at
system power-on. Upon power-up or hardware reset, the DAC registers are initialized to a "zero"
value and the card is set in the Simultaneous Update mode. The cards also support a unique "Soft-
ware Clear" capability. This feature permits resetting the DAC output to zero volts without chang-
ing the output mode.
Software provided with the card includes setup and calibration programs and some sample pro-
grams. The setup and calibration program provides pictorial representation and menu selection on
the computer monitor. For setup, of course, it is not necessary that the card be plugged into the
computer.
Manual Number: 00650-010-6
Page 3
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