ALLIED Vision Technologies Bigeye G-1100 Cool - Manual (Page 46)

Camera interfaces
Bigeye G Technical Manual V2.1.0
46
Notes on triggering
Trigger definitions
Trigger rules
• The end of exposure will always trigger the next readout.
• The end of exposure must always end after the current readout.
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 Variability in 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.
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 Is high if the camera image sensor is not exposing
and/or reading out data.
Table 13: Trigger definitions
Note

The user trigger pulse width should be at least three times the
width of the trigger latency as indicated in Chapter
Specifica-
tions on page 15.