Contec AO-1604CI2-PCI, Руководство пользователя

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4. Functions
AO-1604CI2-PCI
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When using ring format, write the data for one complete cycle of the output waveform before
starting operation.
You cannot write to the memory during its operation of analog output.
DA conversion data is output continuously in the sequence in which the ring format data is stored.
* Although the figure shows a single analog output channel, output from multiple channels is also
possible.
Sampling Start Condition
The condition for controlling the start of sampling can be selected from both software and an external
trigger. The conditions for controlling the start and stop of sampling are completely independent of each
other; they can be set separately.
- Software
The analog output start command executed by software is set as the sampling start condition.
The board starts sampling upon execution of the analog output start command.
- External trigger
The board starts waiting for an external control signal as soon as the analog output start command is
output. Sampling when the specified edge (rising edge or falling edge) is input from the external
control signal.
Sampling Stop Condition
The condition for controlling the stop of sampling can be selected from both the last setting count, and
an external trigger. The board stops sampling whenever an error occurs irrespective of the stop
condition setting.
Last setting count
When the memory type if FIFO, the board stops sampling the moment the sample count reaches the
specified value.
For RING memory, specify the sampling count equivalent to one period of an arbitrary waveform.
- External trigger
The board starts waiting for an external control signal after the sampling have been started. Sampling
stops when the specified edge (rising edge or falling edge) is input from the external control signal.