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Limited number acquisition mode
Limited number of acquisition modes (OneShotmode) refers to one-time acquisition of the set
number of collection points at the set sampling speed.
In OneShot mode, after the DI acquisition triggers, the acquisition
device
will start acquiring
set number of data at the set sampling speed and stop the acquisition automatically after. The
user program only needs to read the set data amount from the computer memory buffer.
Attention
The number of set collection points cannot exceed 2MPts
.
4.2.
Sampling rate
For USB-3200 series of data acquisition
devices
, the DI sampling rate is up to10 Msa/s/ch.
This is parallel simultaneous sampling of all channels, with each channel able to achieve this
highest sampling rate.
4.3.
DI sampling clock
The USB-3200 series data acquisition
device
has a rich DI acquisition timing option. The
DI sampling clock is shown in Figure 4.2.
AI timer
DI timer
DO timer
Conv_IN External sampling clock source
DI sampling clock
Figure 4.2 DI sampling clock option
The DI acquisition uses the DI timer signal as the DI sampling clock by default. The DI
acquisition can be set via software to use other sampling clock sources to achieve the
synchronization of each function.
All timers can be set in steps of 10ns, but the set sampling rate cannot exceed the maximum
sampling rate supported by the device.
The external sampling clock source input from Conv_IN cannot be set to divide or multiply. It can