Matrox Meteor-II /Standard grab section 57
Trigger signals connected to the OPTOTRIG- and OPTOTRIG+ input pins, pass through an opto-coupler, a device that protects the board from outside surges; OPTOTRIG- is usually connected to the ground of the trigger source. The voltage difference across OPTOTRIG+ and OPTOTRIG- must be between 4.05 V and 9.16 V for logic high, and between -5.0 V and 0.8 V for logic low. Refer to Appendix B for the pinouts of these signals on your respective form factor.
User bits
Matrox Meteor-II /Standard supports four auxiliary user bits through the video input connector: two input and two output. These are available for controlling external events such as a strobe light. User bits are programmed using the MIL-Lite command MdigControl().
Using the auxiliary power supply
Matrox Meteor-II /Standard can supply power to your camera. Use the 4-pin power cable provided with your board to connect to the power supply of your computer. The operating voltage can be set to either 5 V or 12 V, but the current drawn by all cameras is limited to 1.5 A. The circuit uses an auto-resettable fuse. For further information on connecting to the auxiliary power supply connector, see the section, Connecting Matrox Meteor-II /Standard to the auxiliary power supply input in Chapter 2, and Appendix B. Note that this input is not available on the CompactPCI and PC/104-Plusform factors.
