Vme Main Board And Fo

The detector controller is connected to a VME crate by means of a fiber optic link (see Fig. 6). On the VME crate there is a processor board with two mezzanine cards. One of these cards is a custom board from Leach to facilitate connection with the controller. The second card, with a dual Gbit Ethernet connection, allows data transmission to a workstation located in the observation room using the telescope Gbit network.

Due to the high data transmission rate available it is not required to introduce any real-time reduction in the VME crate. The reduction will occur afterwards at the workstation. If it were necessary, data handling algorithms could be implemented in the VME crate and, if required, additional hardware modules, such as memory cards, could be added inside the VME crate.

Figure 6. VME and PMC cards.

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