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6. Synchronization System
This chapter introduces the multi-card synchronization system of the USB-3200 series data
acquisition
device
. The synchronous system has 4 ports, sampling clock input, sampling
clock output, external trigger input, and external trigger output.
6.1.
Sampling clock
The sampling clock is used to eliminate the error of the clock between multiple acquisition
devices
, and achieve the synchronization of the sampling rate between multiple acquisition
devices
. At this time, the sampling clock output of one of the acquisition
devices
should be
connected to the sampling clock input of other acquisition
devices
and use the appropriate
software settings. Figure 6.1 shows the sampling clock input circuit.
Figure 6.1 sampling clock input circuit
The sampling clock output circuit diagram is shown in Figure 6.2. The following sources can be
selected as output options:
AI sampling clock
DI sampling clock
DO sampling clock
AI sampling clock
DI sampling clock
DO sampling clock
Conv_Out
Figure 6.2 Sampling clock output circuit
6.2.
External trigger
The pins of external trigger input and output are used to trigger the USB-3200 series acquisition