xiQ - Technical Manual Version 1.0
61
4.3.2.3.
Triggered mode without overlap
This mode gives lower FPS compared to
Free-Run
mode and lower FPS than
Exposure Overlapped with Data Readout
mode.
Sensor timing in Exposure Overlapped with Data Readout Mode
figure 4-2, acquisition mode – triggered without overlap
In this mode the timing depends on sum of:
•
Input transition time (t
itr
), depends on:
o
Digital Input Delay - time for changing internal circuit to active state. It is constant for each camera model.
o
Input Debouncing Time - time for stabilizing uneven input signals (e.g. from mechanical switches). This time can be can
be set using xiAPI with parameters XI_PRM_DEBOUNCE_EN and XI_PRM_DEBOUNCE_T0 on some cameras. Default 0.
•
Exposure time (see ET above).
•
Data Readout time (see t
rd
above)
Typical times for selected camera models
Camera Model DownS
t
itr
[µs]
t
exp
[µs]
t
eio
[µs]
t
expo
[µs]
t
rd
[µs]
Notes
MQ013xG-E2
any
1.4
29
19/238
-10
400+16.6*BWF*LC
N1, N2
table 4-4, trigger mode w/o overlap, timing
Notes:
•
N1: V(Input)=15V
•
N2:
x
in model name means all available models (M, C, R)
Description:
DownS = Current camera DownSampling (XI_PRM_DOWNSAMPLING)
t
eio
= Trigger (Digital Input) to Strobe (Digital Output) (on some models is listed: Off->On change / On->Off change)
t
exp
= Strobe (Sensor) to Digital Output (on some models is listed: Off->On change / On->Off change)
t
expo
= Start of exposition to Exposure Active Digital Output
LC
= Current Line Count (XI_PRM_ HEIGHT)
BW
= Bandwidth Factor for maximum bandwidth this is 1 when the bandwidth will be lower BWF will rise (TBD)
t
exps
= Current Exposure Time set (XI_PRM_EXPOSURE)
Conditions: XI_PRM_DEBOUNCE_EN=0 (off).
Minimum trigger period (T
trig_min
)
Minimum trigger period can be calculated using the following formula:
