The External Control tab allows the user to control external devices connected to the camera, such as triggers or strobes.
The snapshot below demonstrate the functions provided in a trigger window
On / Off - used to activate and deactivate the trigger
Characterization of the trigger signal pulse from modes 0 through 14. Current modes include:
- 0 - Trigger on pulse leading edge for shutter integration time
- 1 - Pulse width defines start and end of integration
- 2 - Start integration at first pulse leading edge and end at Nth pulse leading edge
- 3 - Camera issues triggers internally at fastest frame rate for N frames
- 14 - Camera will capture N frames after first trigger edge
Represents the means of delivering the trigger signal to the camera.
- free running (Frames are output continuously, driven by an internal trigger that occurs as frequently as possible)
- software (the trigger occurs upon receiving a software command)
- hardware (the trigger comes from an external device as an electrical pulse)
Represents the polarity of the trigger signal (the rising or falling edge of the voltage signal). Select "Positive or "Negative"
Represents the delay from trigger detection to start of integration.
Represents a numeric parameter required by some trigger "Modes" and "Types". If this parameter is not required, the field is disabled and represented as N/A.
When the parameters are set, click on "Update Trigger" to send these parameters to the camera.
Once the trigger mode is set, the description of the selected trigger appears in the Trigger Description box.
- On / Off - used to activate and deactivate the GPO pins
- Number - the GPO pin used to carry the current signal
- Strobe - Pulse fires for specified duration and delay after trigger input.
- Normal - Pulse width, or steady state as set through API control.
- Pulse - Specified number of pulses, polarity and duration each time API requests it.
- Busy - Pulse enabled when camera is integrating a frame.
Represents the polarity of the GPO signal (the rising or falling edge of the voltage signal). Select "Positive or "Negative"
Note: "Positive" has a different meaning for enclosed cameras, which has optocouplers and board-level cameras, which have TTL inputs. See Triggers and GPOs for a detailed description.
Up to three additional parameter fields may appear dependant upon what "GPO Mode" is selected.
When the parameters are set, click on "Update GPO" to send these parameters to the camera.
Once the GPO mode is set, the description of the selected trigger appears in the Trigger Description box.