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5.3.
DO sampling clock
The USB-3200 series data acquisition
device
has rich DO acquisition timing options. The
DO sampling clock is shown in Figure 5.2.
AI timer
DI timer
DO timer
Conv_IN
external sampling clock source
DO sampling clock
Figure 5.2 DO sampling clock option
The DO acquisition uses the DO timer signal as the DO sampling clock by default. You can set
DO acquisition to use other sampling clock sources to achieve the synchronization of each
function via software settings.
All timers can be set in steps of 10ns, but the set sampling rate cannot exceed the maximum
sample 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 DO 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.
5.4.
Trigger
The USB-3200 series of data acquisition
devices
provide a rich set of trigger options, as shown
in Figure 5.3, which describes trigger options for the DO output.