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The AI acquisition uses the AI timer signal as the AI sampling clock by default. The AI 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
only be used directly as the sampling clock. The AI timer output signal can be set to the
Conv_OUT pin via software for simultaneous synchronization of multiple devices. See the
"Synchronization System" chapter for details on the external clock.
3.8.
Trigger
The USB-3200 series data acquisition
device
provides rich trigger options. The schematic
diagram of the AI acquisition trigger options are shown in Figure 3.10.
AiSoftTrig software trigger
GlobalSoftTrig global software trigger
Ext_Trig_IN external trigger input
Din_0 edge trigger
Din_1 edge trigger
Din_2 edge trigger
Din_3 edge trigger
DI acquisition trigger
DO acquisition trigger
AI trigger signal
Figure 3.10 AI trigger options
The AI acquisition uses the AiSoftTrig software trigger as the trigger source by default. The AI
acquisition can use other trigger sources via software settings to achieve the synchronization of
each function.
AiSoftTrig software trigger and GlobalSoftTrig global software trigger are software triggers,
which are used to send a command to the acquisition
device
to initiate device triggering.
Ext_Trig_IN external trigger means that when Ext_Trig_IN receives a rising edge, the device
triggers. The AI trigger signal can be set to the Ext_Trig_OUT pin via software for multiple device