Camera interfaces
Page 65
Prosilica GB Technical Manual V2.2.6
Trigger rules
•
The end of exposure will always trigger the next readout.
•
The end of exposure must always end after the current readout.
•
The start of exposure must always correspond with the interline time if
readout is true.
•
Exposure start delay equals the readout time minus the registered exposure
time.
Triggering during the idle state
For applications requiring the shortest possible trigger latency and the smallest
possible trigger jitter the user trigger signal should be applied when imaging is
false and idle is true. In this case, trigger latency and trigger jitter are as indicated
in the camera specifications.
Triggering during the readout state
For applications requiring the fastest triggering cycle time whereby the camera
image sensor is exposing and reading out simultaneously, apply the user trigger
signal as soon as a valid trigger ready is detected. In this case, trigger latency and
trigger jitter can be up to 1 row time since exposure must always begin on an
Interline boundary.
Exposure start delay
Registered exposure time subtracted from the readout time and indicates
when the next exposure cycle can begin such that the exposure will end
after the current readout.
Interline time
Time between sensor row readout cycles.
Imaging
High when the camera image sensor is either exposing and/or reading out
data.
Idle
High if the camera image sensor is not exposing and/or reading out data.
The user trigger pulse width should be at least three times the width of the trigger
latency as indicated in
Term
Definition
Table 19: Explanation of signals in timing diagram (sheet 2 of 2)
