Advantech iDAQ-934, Руководство пользователя

Страница: 25 / 54

15 iDAQ-934_964 User Manual
C
ha
pte
r 3
Fu
nc
tio
n D
eta
ils
3.2.2 Start Trigger and Stop Trigger
Start trigger and stop trigger may come from one of the following sources:

Software command (choose “None” in the software)

One of the programmable function pin (PFP) inputs

Trigger from one of the slots
Trigger signals are edge sensitive. The active edge of the trigger source can be
selected as rising edge active or falling edge active.
3.2.3 Sample Clock
Sample clock may come from one of the following sources:

Programmable clock divider output

One of the programmable function pin (PFP) inputs

Signal from one of the slots
There is a programmable clock divider on the chassis for each acquisition engine.
Refer to A.6 Acquisition Engine for possible output frequency.
Sample clock is always rising edge active.
3.2.4 Programmable Function Pin (PFP)
There are two programmable function pins (BNC connector) on the chassis. These
pins are bi-directional and can be configured for various functions.
As an input pin, it can be the source of start trigger, stop trigger, or sample clock for
an acquisition engine as shown in Figure 3.1.
As an output pin, the signal can come from one of the timing signals (start trigger,
stop trigger, or sample clock) in one of the acquisition engines. This is shown in Fig -
ure 3.2 and 3.3.
Figure 3.2 Signal routing for programmable function pin 0 as output.