Hi 叶不知秋 ,
If you don't see the DIAdem "DAC" and "VISUAL" panels, then you have a version of DIAdem without them. Most of the DIAdem versions with "DAC" are sold in Europe, where the customer base is the strongest. In the Americas and in Asia, the "DAC"-less version is usually sold.
DIAdem "DAC" is a panel in DIAdem with which you can program the acquisition of data from hardware devices. DIAdem "VISUAL" is the dashboard or front panel that shows the measured results of the acquisition while it is running.
Feel free to contact your local NI salesperson for further information,
Brad Turpin
DIAdem Product Support Engineer
National Instruments
