CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 1 Tridas Status Drew Baden University of Maryland June 2004

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 2 Princeton Fanout Board QPLL implemented this way allows RX_CLK to be “cleaned” at each board if needed

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 3 HCAL Fanout board Final version in operation –CERN, Maryland, FNAL, Wisconsin… –No problems – board is ready for production ECAL needs –4 + 2 spares Plus parts for 3 more HCAL needs – spares Will build that plus parts for 4 more –6 more for test stands, etc. Total: 33 boards plus parts for 7 more Time scale: –Can assemble 6 more on short time scale –Reset needs to wait for an amplifier (14 weeks) Proposal –Tell Jeremy and Chris to go ahead with production now

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 4 TTC_UMD Cards Purpose: –Carry TTCrx onto HCAL boards (HTR, DCC, Fanout) –All boards produced –Vendor put in the LEDs backwards Using students to fix it –Checkout happening now, using students, finished by end of summer

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 5 DCC Status DCCv4 boards used in TB03 –Being used now in H2 and elsewhere –Testbeam boards have the up to date v5 firmware DCCv5 – identical to v4 except for new front panel w/LEDs –LED “boards” are produced –10 new logic boards ready in Boston –Plan to have “a few” ready by May (E. Hazen) –Can provide new firmware for all existing v4s Main firmware change is in the input channel numbering Production: –Planning to build 50 DCCs in total Another 10 motherboards over what is available now) –Planning to change the 10-pin RJ45 connectors on the LRBs to match the new variety New connectors prevent inadvertent insertion of 8-pin RJ45 connectors and bending the pins

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 6 Changes to HTR for Rev4 Clocking issues –No earth-shaking changes –No evidence of any difficulties associated with HTR layout/implementation “Cosmetic” changes –Moved 2 LC’s down to giver more clearance for fibers –Removed hot swapping circuits Worry about noise, decided not to require HTR to be hot swappable –Front-panel changes –Bias resistors for all differential pair inputs (a powerup issue only…) –Change DCC 10-pin connectors Fanout input is 8-pin standard RJ45 Eliminate possibility of plugging Fanout cable into DCC connector, munging pins –Changes to VME to accommodate software (Big/Little Endian defaults) Miscellaneous changes –Fixed what was found to be wrong with Rev3 board, add test points, other minor stuff

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 7 Changes to HTR for Rev4 (cont) Changes necessary for SLB –Optimized critical clock and data lines –HTR 40MHz “LHC” clock to come from TTC TPG data and TTC broadcast need to have synchronization –Added hardware reset circuitry for TTCrx –Deal with SLB startup current –Added separate SLB JTAG chain

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 8 HTR Schematic SLB RX_CLK40 SLB RX_BC0 TTC TTCrx CLK80 Crystal Serial Optical Data Ref Clk Deserializers (8) 20 Recovered Clk TPG Path SYS40 Clk TTC Broadcast Async Fifo PLL TTC 40 Clk x2 XILINX LC Fiber Data Princeton Fanout Card (1/VME crate) SYS80 Clk

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 9 HTR TPG Testing Testing with latest SLB: –Localbus access of SLB verified easily –JTAG chain working –Link tests between SLB and Wisconsin test receiver board (STC) 1.2Gbaud copper link: verified at Maryland Data verification also passed at Maryland –Link tests at Madison in May 2004 Data sent from HTR into SLB into Wisconsin trigger receiver board Some problems found but these were limited to SLB/RCT issues –Tests underway on TPG cables Testing various cat6 quad twisted pair

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 10 SLB/Receiver Test Boards So far, used Wisconsin STC boards –Very nice for Wisconsin requirements –We need something different for commissioning and production Something more flexible and programmable for mass testing –260 HTRs, 6 SL B/HTR….can’t see plugging each one into a single STC Layout underway for an SLB/Vitesse mezzanine transition –Allows use of 6 HTR SLB sites –Run backwards into XILINX Board is now under design –Estimate another ~month in the lab for testing. HTR SLB site UW Vitesse receiver mezzanine card

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 11 HTR Production Status Production –Preparing fab and assembly contracts Will be ~$90k for each. $90k each, causes Maryland purchasing dept fits –3 Rev4’s built and verified, some small changes –6 Rev4’s at the assembler now – back this week or early next week Will verify, then send some to H2 for HO setup –Will proceed to full production after next batch of Rev4’s are verified Integration tests in Madison in May established the TPG patch electrically –Any changes will be accommodated in firmware

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 12 HTR Rev4 Status Current (Rev4) board – 3 in lab now –Testing:  Links/Clocks (same as Rev3, no problems, no mystery at UMD)  DCC path exactly same as Rev3  TPG path –Just a few layout changes needed, ready for production –Production can begin just as soon as next 6 Rev4’s checkout Expect to spend rest of CY04, but maybe sooner depending on how well it goes.

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 13 Fiber Data Links What we’ve learned about links this past year: –Dirty fibers – causes mode-dependent reflections and interference Persistent cleaning usually helps, sometimes alot –Reflection at surface of Stratos LC receiver <12dB reflected light is large – about 5% reflection We believe reflected light is again reflected by MTP connector and interfering with primary optical signal –Attenuators between LC and Stratos always cure this –VCSEL bias current can be varied by I2C to GOL Installation/commissioning – this will need to be tuned to lowest value –QPLL really helps Especially on FE card but also on HTR –HF layout tweaked, much better results reported The proof of the pudding is in the eating –H2 running no longer worries about the fiber data links!!!

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 14 H2 Fiber Link Errors (Anecdotal…) Today we are running with 81 fibers sending data to the HTRs –Took a quick 5 minute run (0.5x10 12 bits) –All fibers link up nicely and keep their links –76 show no errors (93.8 ± 2.7% error free) –2 had 2 errors, 1 had 5, 1 had 9, 1 had 156 Will investigate these this week Try more cleaning, and tweak VCSEL current to see what happens Take 10 minutes worth, see how high an error-free rate we can get

CMS/HCAL/TriDas. Mar, 2004 HCAL TriDAS 15 Level 1 Latency As of this year, we were close –Within 1-2 ticks away from the budget The ball’s in Wesley’s court He has caved from his original 20m down to 10m