Camera interfaces
Page 64
Prosilica GB Technical Manual V2.2.6
Trigger timing diagram
The following diagram explains the general trigger concept.
Trigger definitions
Figure 27: Prosilica GB 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).
t
pd
Propagation delay (
t
pd
) 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
Deviation from the trigger latency time.
Trigger ready
Indicates to the user that the camera will accept the next trigger.
Registered exposure time
Exposure time value currently stored in the camera memory.
Table 19: Explanation of signals in timing diagram (sheet 1 of 2)
User trigger
Logic trigger
Exposure
Readout
Trigger ready
Imaging
Interline
Ɵ
me
Idle
t
pd
Trigger
latency
Exposure
start delay
Trigger
ji
Ʃ
er
Registered
exposure
Ɵ
me
Readout
Ɵ
me
N
N+ 1
N
N+ 1
Note: Ji
Ʃ
er at the beginning
of an exposure has no e
ī
ect
on the length of exposure.
