Sigma LBA-712, LBA-710, LBA-714PC manual Integration Control, With Trigger Type set to Trigger Out

Example: With the Capture Interval set to 10, and a 30 Hz frame rate camera, the capture rate will be 3 fps.

5.2.1.2With Trigger Type set to Trigger Out

The frame rate of the camera and the Trigger and Capture Intervals will combine to determine the capture rate.

Example: With the Capture Interval set to 10, and the Trigger Interval set to 5, the captures will occur once for each 50 frames. If your camera has a 25 Hz frame rate, the capture rate will be once every 2 seconds, or 1/2 Hz.

5.2.1.3Trigger Type set to Video Trigger with the LBA firing the laser

The frame rate of the camera and the Trigger and Capture Intervals will combine to determine the capture rate.

Example: If the LBA is being used to trigger the laser, and the Capture Interval is set to 10, with the Trigger Interval set to 10, the captures will occur once for each 100 frames. If your camera has a 25 Hz frame rate, the capture rate will be once every 4 seconds, or 1/4 Hz.

In the above example, only frames that satisfy the Video Trigger Level threshold value will be counted. Thus if some of the laser shots are too low in energy, the resulting acquisition rate will lengthen in multiples of the Trigger Interval.

5.2.1.4Trigger Type set to Video Trigger without the LBA firing the laser

The frame rate of the camera and the laser pulse rate will combine to determine the capture rate. Only frames that satisfy the Video Trigger Level threshold value will be counted. Thus if some of the laser pulses are too low in energy, those shots will not be included in the Capture Interval count, resulting in slower acquisition rates.

Example: If the LBA is not being used to trigger the laser, and the Capture Interval is set to 10, the captures will occur once for each 10 times that the laser fires. If the laser fires at a 2 Hz rate, then the capture rate will be once every 5 seconds, or 1/5 Hz.

5.3 Integration Control

If you have purchased the digital camera option then multiple frame integration can be performed when using certain select digital cameras. This feature is not usually required for laser beam analysis because most lasers are much too bright when compared to camera sensitivity. However outputs from some fiber optic systems and laser diodes at certain wavelengths can be hard to detect at normal integration times. To overcome this problem we have added a camera integration control. This feature is limited to Digital cameras that maintain frame, line and pixel clock signals during the non-readout periods. These cameras further constrain the integration times to multiples of the normal frame integration period. Furthermore, these cameras provide a TTL input signal that allows the LBA frame grabber to control the integration timing.

Operator’s Manual	123	LBA-PC
Doc. No. 10654-001, Rev 4.10