Contec AO-1604CI2-PCI, Руководство пользователя

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4. Functions
AO-1604CI2-PCI
49
High-functional analog output
When an analog output start command is executed by software, DA conversion is performed in
synchronization with the sampling clock from when the sampling start condition is met to when the
sampling stop condition is met.
The analog output operation stops when the sampling stop condition is met.
0ch
1ch
2ch
Sampling clock
frequency
0ch
1ch
2ch
0ch
1ch
2ch
Sampling
count : 1
Sampling
Analog output operating Analog output
operation stop
Analog output
start command
Sampling
start condition
satisfied
Sampling clock
input
Sampling clock
input
Sampling clock
input
Sampling
stop condition
satisfied
Sampling
count : 2
Sampling
count : 3
Sampling is defined as a series of operations performed from when the sampling start condition is met
to when the sampling stop condition is met.
The number of times DA conversion is executed during sampling is counted as a sampling count.
The sampling count can be used as the sampling stop condition (as described later).
The following settings are required for high-functional analog output:
Sampling clock
The internal or external sampling clock can be selected as the sampling clock that determines the DA
conversion period. The sampling clock is selected by means of software.
- Internal sampling clock
The clock signal from the on-board clock generator is used.
- External sampling clock
The edge of the digital signal input from an external device is used for the sampling clock.