8.Features
© China Daheng Group, Inc. Beijing Image Vision Technology Branch 45
Strobe
In this mode the camera sends a trigger signal to activate the strobe. The strobe signal is active low. After
receiving the trigger signal, the strobe signal level is pulled low, and the pull-low time is the sum of the
exposure delay time and the exposure time.
Trigge r Signal
Strobe Signa l
Signal2
Signal
1
Exposure delay time
+ Exposure time
Signal3
Exposure delay time
+ Exposure time
Exposure delay time
+ Exposure time
Figure 8-4 Strobe signal schematic diagram
UserOutput
In this mode, the user can set the camera's constant output level for special processing, such as controlling
the constant light source or the alarm light (two level types are available: high level or low level).
For example: select line2 as the output line, the output source is selected as UserOutput1, and the output
value is defined as true.
"LineSelector" is selected as "line2", "LineMode" is set to "Output", "LineSource" is set to "UserOutput1",
"UserOutputSelector" is selected as "UserOutput1", and "UserOutputValue" is set to "true".
ExposureActive
You can use the "ExposureActive" signal to check whether the camera is currently exposing. The signal
goes low at the beginning of the exposure and the signal goes high at the end of the exposure. For
electronic rolling shutter cameras, the signal goes low when the exposure of the last line ends.
Trigge r Signal
Exposure Act ive
Signal
Si gnal2
Si gnal1
Exposure
time
Si gnal3
Exposure
time
Exposure
time
Figure 8-5 Global shutter "ExposureActive" signal schematic diagram
