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The figure on the right shows a typical local lab setup for testing a sub-detector readout.  The TTC distribution system may consist of a TTCtx optical transmitter together with up to 14 TTCoc optical splitters to drive many TTCrx's or a simple TTCvx in case the test setup contains no more than 4 TTCrx's. ODIN is capable of driving both.

The dashed objects may or may not be needed depending on the aim and the size of the setup.

Here are a list of advices to set the TFC system up correctly:

  1. ODIN requires cooling and should be installed in the same type of crate as the TELL1

  2. Install the CCPC, preferably with the IP name or alias OdinV2XX where XX corresponds to the board identifier.

  3. Create an account "tfc", download and install the TFC CCPC software (see TFC Local Control)

  4. The TTCtx, alternatively TTCvx, modules require a 6U standard VME crate, but only for power. No controller is needed.

  5. If you use a TTCvx: Use as short LEMO cables as possible to connect channel A and B from ODIN to the TTCvx. Connect the clock from ODIN to the TTCvx, not the other way around. Use orange multi-mode ST/ST TTC fibre patch cords to connect the TTCrx. These fibres are available from the CERN store but mind that this type will not be used for final experiment.

  6.  If you use a TTCtx: Use as short LEMO cable as possible to connect the TTC output on ODIN to the I/P input of the TTCtx. Use a single-mode ST/ST fibre patch cord to connect to the TTCoc. These fibres are only available from the TS/EL group (contact Luit.De.Jonge@cern.ch or Stephane.Casenove@cern.ch). The reference of the fibre is e.g. CERN-ST/ST09S00200 ( = 2 m).

  7.  The TTCoc is a 1U x 19" rack-mounted module requiring no power. If you don't have a TTCoc you may use single-mode attenuators instead to reduce the optical signal to a level which is acceptable to the TTCrx pin-diode.

  

  1. Use the same single-mode fibre patch cords between the TTCoc and the TTCrx's.

  2. Connect the throttle patch cords between the TELL1 boards directly to ODIN, or HUGIN in case you have more than two TELL1s.

  3. In case your setup requires HUGIN, use the same type of throttle patch cord to connect between HUGIN and ODIN.

    Documents
  • How can I run my detector? - Readout Partitioning and Running Modes, LHCb 2001-140 DAQ, Nov. 2001 (paper)

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