We carried a V2 IO chassis and a V4 front-end computer to the X end for the new stuffs for K1EX0.
The V2 IO chassis is located at the front of EX0 rack and the V4 front-end is in EX1 rack.
These stuffs will be used in the replacement work from maybe day after tomorrow.
The status of each station regarding the replacement work is as follows.
It seems that replacement work can only be carried out on the first floor at both end stations over the next couple of weeks.
X-end 1F
- Replacement work can be fully conducted.
- New fiber cables between EX1 (2F) and EX0 (1F) were already laid.
- MTP breakout cable (1-2m) is required to connect the front-end computer to the splice box.
- An edge at EX0 side of MTP cable accommodates the input port of V2 IO chassis.
- One SMF-SFP module is required for connecting the V4 front-end to the RFM switch by using the RFM board attached to the current V3 front-end.
- KVM, UTP for DGS, UTP for DAQ, SMF for RFM, MMF for Timing, and BNC for IRIG-B are necessary in EX1 rack
- A new 24V DC power supply for IO chassis is required
- If 24V-10A isn't enough, 24V-30A power supply, 5U space and AC-20A source must be prepared.
Y end 1F
- IO chassis can be replaced but the front-end computer can't be moved to 2F yet.
- New fiber cables between EY1 (2F) and EY0 (1F) haven't yet been laid.
- Removing V3 front-end and installing V4 one there is current best solution.
- MTP breakout cable (1-2m) is required to connect the front-end computer still in 1F and the V2 IO chassis.
- All other cables can be reused as ones used by V3 front-end computers.
- A new 24V DC power supply for IO chassis is required.
- If 24V-10A isn't enough, 24V-30A power supply, 5U space and AC-20A source must be prepared.
X/Y end 2F
- We cannot start until purchasing a 20-25m MTP breakout cable for each station in the next fiscal 2026.
- All necessary items except 20-25m MTP breakout cable and a cabling work are right there
- A same working procedure as ones for ITMs can be applied for ETMs