EXTERNAL TRIGGER. Imperx Bobcat, bobcat hd-sdi, BOBCAT CameraLink PoCL, BOBCAT GEV

2.6 EXTERNAL TRIGGER

BOBCAT Hardware User’s Manual

2.6.1 Triggering Inputs

In the normal mode of operation, the camera is free running. Using the trigger mode allows the camera to be synchronized to an external timing pulse. There are three input modes available for external triggering – software (CC), internal (pulse generator), and external. Please note that the desired trigger input has to be mapped to corresponding camera input. For more information, please refer to the I/O Control section.

- “External” – the camera receives the trigger signal coming from the connector located on the back of the camera.

- “Computer” – the camera receives the trigger signal command from the framegrabber.

- “Internal” – the camera has a built in programmable pulse generator – refer to

“Pulse Generator” section. In Internal triggering mode the camera receives the trigger signal from the internal pulse generator.

- “Software” – the camera receives the trigger signal which is computer generated. This input is available only for GigE Cameras. The camera expects a one clock cycles pulse generated by the computer. The trigger exposure is internal register controlled. Pulse duration exposure is not allowed.

2.6.2 Acquisition and Exposure Control

For each trigger input the user can set the trigger edge, the over-trigger conditions, the de-bounce (de-glitch) time, the exposure time, the exposure delay, and the number of frames captured.

1. “Triggering Edge” – the user can select the active triggering edge:

- “Rising” – the rising edge will be used for triggering

- “Falling” – the falling edge will be used for triggering

2. “De-bounce” – the trigger inputs are de-bounced to prevent multiple triggering from ringing triggering pulses. The user has eight choices of de-bounce interval:

- “Off” – no de-bounce (default)

- “10”

 s, “50”

 s, “100”

 s, “500”

 s de-bounce interval

- “1.0” ms, “5.0” ms, “10.0” ms de-bounce interval

3. “Trigger Overlap” – if the next trigger pulse arrives while the previous triggering cycle is in process, the user has three options:

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