1. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna Status of Trigger Server electronics Trigger boards TB Server board SB Topics:  Trigger Server Status  TSS screening  TSM and SB pre-production tests  LVDS Jitter tolerance measures

2. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna Trigger Server – Status update LVDS to Sector Collector Control serial line Chamber Minicrate …… Server Board Link board “backplane” bus TSS (1200 ASIC, Alcatel 0.5  m): - full production already delivered - currently: screening of 1200 working devices ready to start TSM (250 TSMS + 500 TSMD pASIC, Actel, 0.35  m): - 1000 device (to be fused) in hands - Final Prototype succesfully tested! - 1 month to fuse all chips (ext firm already contacted): wait for pre-production tests of the Server Board (End Apr.) Server Board : -pre-production delivered in March. 03 (5 SB) -2 SB succesfully tested ! -Pre-series production will start soon (beginning of May) -> to provide 35 SB for ’03 minicrate production - tender for full production going on

3. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna TSS Screening – HW system Screening will be performed in Bologna with the test jig setup for prototypes Piggy board mounted on a Pattern unit emulating Traco input and receiving output TSS Asic Alcatel 0.5  m CMOS Product by Europractice

4. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna TSS Screening – SW system SW developed in Visual C++, fully automatic *) interfaces Power supply and clock generator through GPIB protocol *) interfaces mySQL database for bookeeping Full test: Bonding check Running test (different conf, Clock frequency and Voltage supply) Monitor and control logic check (Jtag and Parallel access) Spying and Test features (snap and test reg.s) Power consumption continuously monitored

5. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna TSS Screening – System performance Process yield 70% Package yield 90% (conservative estimate) Delivery consists of 2700 chips To have 1200 TSS working We need to test ~ 2000 chip 4 weeks ! With a working time of 4 hour/day Performances of the test system: Test sorting in different setups with 10 6 patterns (~16 s @ 60 Kevt/s) Test monitoring and control logic ( ~ 5 s) Bookeeping into the database Bonding check ( < 1 s) 2 min/chip

6. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna 9.5 cm 20.6 cm TSM side TSMS Reminder: TSM is implemented with 3 pASIC Actel A54SX32 0.35  m CMOS PCB 16 layers ! Front side National serializer 10-to-1 DS92LV1021 Server Board – Pre-production TSMDs NB: Backside contains most of the control logic electronics for the minicrate

7. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna Server Board – Test System Crate VME Vme board with CPU Pentium II Rs232 PC serial port Server Board Pattern Units 232 bits @ 40 MHz Adapter Board Trigger Link Rx LVDS link – data serialized @ 480 MHz 2 copper cables FTP class 6– 40 m 80 bits @ 40 MHz 232 bits @ 40 MHz

8. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna Server Board – Test Setup Server Board Adapter Board Trigger Link Rx

9. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna Server Board – Software for tests SW controls all test options: Generates, transmits and receives pattern Checks output with emulation Finds better setup conditions Provides monitoring and configuring Developed under WinNT with Visual C++ SW to use for full SB production test. Clock phase (input) Clock phase (output) Goodworkingcondition!

10. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna TSM design – a reminder… TSM system is the bottleneck of the trigger electronics on chamber. It is segmented on 3 pASICs with partially redundant functionalities: Two main working modes:  Normal mode (all pASICS work properly)  Backup mode (one or two pASICs in failure)

11. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna TSM algorithm – another reminder.. Normal mode: implemented by sorting 1 track out of 6 for BX Backup mode: each half chamber sorts 2 tracks independently in two BXs, by means of a “quick” sorting (quality bits are involved) Main features (enabled in default, can be switched off): Recovery of “good” track eventually found at the previous BX (called carry ) Ghost rejection Recovery of “good” tracks in overlapped events (i.e.pile-up between tracks from events in consecutive BXs) Remember: TRACO sends 2 tracks belonging to the same trigger events in 2 consecutive BXs TS task : to sort two best tracks in two consecutive BXs

12. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna TSM and SB – Test Status Server Board Tests Summary (2 boards fully tested):  Board layout was checked and approved for production.  Signals transmission from Pattern Units has been successfully checked! (N.B: it has the same characteristics of transmission from Trigger Boards)  TSM monitoring and configuring works fine!  TSM output tests with LVDS transmission through 40 m cables has been performed. TSM Algorithm Tests Summary:  First test: About 1000 “surgical” input patterns have been initially used. These “surgical” patterns, developed during the chip design and simulation, thoroughly check all functionalities, in different configurations also.  Second test: About 10 9 random input patterns have been submitted with different configurations in long tests periods (3-4 days) to find bugs and check stability and performances Results: -TSM and SB work as expected up to 44 MHz of clock frequency and transmitting output through cables long up to 40 m.

13. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna LVDS Trigger Link TSM MB 1 MB 2 MB 3 MB 4 Balcony Sector Collector VME Crate Sector Collector Board “Ethernet” cables ( up to ~40m ) CLASS 6 FTP Z  = 100  Opto-Link DTTF ( in USC55 ) TSM

14. Bologna, 10/04/2003 Workshop on LHC Physics with High P t Muon in CMS R.Travaglini – INFN Bologna Jitter Measurements Jitter Tolerance measured in Bologna Stand-alone LVDS transmission system equipped as the final trigger link system Clock Jitter generator Maximum Jitter tolerated from National Serializer LVDS in worst conditions with Cable of 40 m lengths => RMS = 80 ps Jitter Tolerance measured in Legnaro TTCex driven by TTCvi TTCoc inserted (Optical input power = -20dBm) TTCrx in MC sends clock on LVDS ser. No Broadcast command Measured : RMS = 26 ps