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waveform needs to be output is set, and the channel for outputting the digital waveform is set.
After the DO output is triggered, the capture card begins to output a digital waveform in
accordance with the set parameters. After the set number of outputs is reached, the capture card
stops outputting the digital waveform.
Attention
When the specified number of outputs is completed, the DO output
level state stays at the level defined by the last point of the waveform
data.
Infinite loop output mode
Infinite loop output mode means that the digital waveform data to be output is first stored in the
hardware FIFO, and then the output sampling rate is set. After the DO is triggered, the
acquisition
device
starts to output the digital waveform according to the set parameters, and
continuously loops the output until the DO triggers cleared to an untriggered state.
Attention
After clearing the DO trigger to the untriggered state, the DO output
level state stays at the level state at which the DO trigger is cleared.
Infinite non-loop output mode
The infinite non-loop output mode refers to a waveform in which the DO output exceeds the
length of the hardware FIFO space, and the computer transfers the data in batches to the DO
hardware FIFO.
For example, a waveform with a length of 1M point needs to be output at a sampling rate of
10kSa/s, and the DO hardware FIFO space is only 2k points, so the waveform of 1M point length
needs to be transferred to the DO hardware FIFO in 500 times. The 2k point data in the hardware
FIFO, with an output sampling rate of 10kSa/s, can be transmitted in 0.2 seconds. Therefore, the
computer must start a new data transmission in less than 0.2 seconds to ensure the continuity of
DO output waveform.
When the waveform output in the hardware FIFO is complete and no new data arrives, the DO
output level state will remain at the level defined by the last point.
5.2.
Output update rate
USB-3200 series data acquisition
device
DO output update rate can reach up to 10MSa/s/Ch.
This means parallel simultaneous sampling of all channels, while each channel can achieve this
highest
sampling rate.