Contec AIO-120802LN-USB, User Manual

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4. Application Development
AIO-121602LN-USB, AIO-120802LN-USB
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Procedure
(1) Chose the device name of the device to be used from the upper left combo box, and click the setting
button.
(2) The conversion conditions are set on the screen of the analog input setting.
Once an input is done at the sampling frequency specified as data taking-in sampling, an event
occurs and data will be acquired. Click the OK button to finish setting the conditions, and returns to
former screen.
(3) Start the measurement with measurement start button. The various states during the conversion are
displayed.
The number of the samplings in FIFO is:
It is conversion data taken in the memory. This can be visually checked in a "memory image".
Event generation sampling frequency:
When the number of input sampling in FIFO reaches this frequency, the event generates.
Total input sampling frequency:
It is the total number of samplings for application in the memory.
Measurement may stop by the following errors.
Sampling clock error:
It means that the conversion speed is too fast and the driver processing is not in time when
converting at the internal clock.
The cycle of the clock is too fast when converting it at the external clock. Moreover, the cause by
noise etc. is also concerned.
Buffer overflow:
The memory overflows since the conversion speed is too fast compared with the one at which data
is inputted.
(4) Click the “stop” button, and measurement stops.