BOC

The BOC (or Back Of Crate) module is part of the SctHardware. It is the primary data and control interface between the modules (in both the Barrel and the End-Caps). As such, it performs the following core functions:

• It receives the optical data packets from the detector modules via the fibre ribbons, converts them to electrical form, and passes them to the ROD (Read Out Driver) modules.
• It takes the electrical control signals form the ROD, converts them to Bi-Phase Mark encoded optical signals, and dispatches these down the clock and control fibres to the detector modules.
• It takes the data stream from the ROD in parallel form, and provides the SLink? path via the ROB? (Read Out Buffer) to the DAQ.

A number of related and ancillary tasks are also performed, such as:

• the reception and regeneration of the clock signal as provided by the TIM module
• timing comparison, threshold adjustment, and clock synchronisation for the received optical signals
• masking, timing (TxDelay) and laser current adjustment functions for the transmitted control signals, and other operations supported by the BPM? chip.
• provision of the required LaserSafetyInterlocks?

The BOC parameters are configured from the BocSetupTests

Extracted from Maurice Goodrick's BOC web site: http://www.hep.phy.cam.ac.uk/~goodrick/AtBOC/