Allocating independent MIL digitizers on Matrox Rapixo CXP boards

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You can allocate up to four independent MIL digitizers on your Matrox Rapixo CXP, using MdigAlloc(). Independent digitizers have different device numbers and use different acquisition paths. You must allocate a digitizer for each CoaXPress link. A CoaXPress link contains all the connections and components to capture from one video source.

When connecting a video source with multiple connections to Matrox Rapixo CXP, the master connection determines which device number should be used when allocating your digitizer. For example, if the master connector is plugged into CXP 0, use M_DEV0 to allocate the digitizer. If, however, the master connector is plugged into CXP 3, use M_DEV3 to allocate the digitizer. The other connectors for the same video source (called extension connectors) combine with the master connection to form a CXP link.

Both of the following configurations depict two CXP links, each with a master connection and an extension connection.

In configuration 1, you should allocate a digitizer for video source 1 using M_DEV0; whereas, you should allocate a digitizer for video source 2 using M_DEV2.

In configuration 2, you should allocate a digitizer for video source 1 using M_DEV0; whereas, you should allocate a digitizer for video source 2 using M_DEV1. Configuration 2 has a slight speed advantage to configuration 1 when the digitizer initializes, since the available devices will be scanned for initialization from 0 to 3.