Delay the external trigger signal (HRTC)

Note

Please have a look at the Hardware Real-Time Controller (HRTC) chapter for basic information.

0. WaitDigin DigIn0->On
1. WaitClocks <delay time>
2. TriggerSet 0
3. WaitClocks <trigger pulse width>
4. TriggerReset
5. Jump 0

<trigger pulse width> should not less than 100us.

Figure 1: Delay the external trigger signal

As soon as digital input 0 changes from high to low (0), the HRTC waits the < delay time > (1) and starts the image expose. The expose time is used from the expose setting of the camera. Step (5) jumps back to the beginning to be able to wait for the next incoming signal.

Note

WaitDigIn waits for a state.

Between TriggerSet and TriggerReset has to be a waiting period.

If you are waiting for an external edge in a HRTC sequence like

WaitDigIn[On,Ignore]
WaitDigIn[Off,Ignore]

the minimum pulse width which can be detected by HRTC has to be at least 5 us.