ALLIED Vision Technologies Guppy F-503 - Manual (Page 171)

Controlling image capture
GUPPY Technical Manual V7.1.0
171
Trigger_Mode_0 (edge mode) and
Trigger_Mode_1 (level mode)
Figure 97: Trigger_Mode_0 and 1: global shutter (CCD only)
Shutter register value
Integration Time
External Trigger input, as applied at input pin
External Trigger input, as applied at input pin, trigger falling edge