ATLAS Level-1 Calorimeter Trigger
FOX (Fex Optics eXchange)
Responses to FOX PDR comments.
ITEMS FOR THE ATTENTION OF ATLAS
All noted. Specific responses:
2. Tile requirements on the FOX in Run 4, this will be coordinated between Tile and
L1Calo.
ACTIONS FOR L1CALO
All noted. Specific responses:
11. Number of signals the FOX demonstrator is required to handle. Following the
discussions between LAr and L1Calo, 48 fibers (i.e. one connector), as presented,
appears to be appropriate.
ACTIONS FOR THE FOX DESIGN TEAM
All noted. Specific responses:
21. Which eFEX fibers are unused: Exactly which fibers are unused depends on the
final eFEX design and cannot be decided now, due to the complex routing of the
board. We have added the information to the document.
23. Document power requirements of the FOX. This information has been added to
the document in section 1.5.
DESIGN CLARIFICATION
All corrections implemented. Specific responses:
27. The numbers have been double-checked, though they are changing as design
details are changing. There will be a separate mapping document with all of the
detailed numbers.
28. Table 1 for the lower link speed assumes BCMUX for LAr fibers to eFEX. Table 2
for the higher link speed assumes no multiplexing. This information has been added
to the table captions (new table numbers 2 and 3).
MINOR DOCUMENT CHANGES
All implemented except noted below. Specific response:
61: The detailed mapping including numbers of fibers to each type of module will be
described in a separate document.