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Each camera has a host server that is running an EPICS IOC to handle low-level command, image acquisition, and to broadcast the data via channel access. Recorded cameras need to run on IOC hosts with hard disk drives, so the CXI sample chamber cameras run on ioc-cxi-rec03(Rack 59 : Red Hat 5) and ioc-cxi-rec04 (Rack 52A : Red Hat 7). Access to the host and IOC process can be achieved using the IOC manager. The cameras are also synced to LCLS timing, and thus require a TTL trigger signal from their host's EVR hardware – typically a SLAC EVR PCI card in the server chassis. This is usually routed from the host to the camera via a user patch panel over coaxial cable.
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