ALLIED Vision Technologies Prosilica GC2450 - Manual (Page 57)

Prosilica GC Technical Manual V2.0.8
57
Camera trigger
Trigger timing diagram
Notes on triggering
Figure 39: Prosilica GC internal signal timing waveforms
Term Definition
User trigger Trigger signal applied by the user (hardware
trigger, software trigger)
Logic trigger Trigger signal seen by the camera internal logic
(not visible to the user)
Tpd Propagation delay between the user trigger and the
logic trigger
Exposure High when the camera image sensor is integrating
light
Readout High when the camera image sensor is reading out
data
Trigger latency Time delay between the user trigger and the start
of exposure
Trigger jitter Error in the trigger latency time
Table 20: Explanation of signals in timing diagram
User trigger
Logic trigger
Exposure
Readout
Trigger ready
Imaging
Interline time
Idle
Tpd
Trigger
latency
Exposure
start delay
Trigger
jitter
Registered
exposure time
Readout time
N N+ 1
N N+ 1
Note: Jitter at the
beginning of an exposure
has no effect on the
length of exposure.