Hit Finder Timeline

Selected events in timeline of Hit Finder prototyping/production process:

  • 2000-05-02 : Production boards 004,005 installed at B0!
  • 2000-04-28 : Got first assembled board from Twin Hunter--it's perfect!
  • 2000-04-20 : Got back two re-worked boards from SMT: one of them is OK, one has about 40 unsoldered pins
  • 2000-02-08 : SMT cancels contract
  • 2000-02-01 : Verified all PCB design changes OK, using partially resuscitated pre-production boards
  • 2000-01-26 : Got two pre-production boards from SMT; both show serious assembly problems
  • 1999-12-02 : Prototype at B0 saw FIB data from "three-system test" in progress
  • 1999-11-23 : PCB approved for fabrication
  • 1999-11-19 : Artwork film received
  • 1999-11-16 : Gerber files mailed to SMT for pre-production
  • 1999-11-14 : Ran ~ 50M random events over past 1.5 weeks (see note 3)
  • 1999-10-13 : Pre-production design changes begun
  • 1999-10-08 : Checked ~ 13M random events including error conditions (see note 2)
  • 1999-08-30 : Checked ~ 500M events over ~ 1 week of spy buffer polling (see note 1)
  • 1999-08-09 : HF (OSPY) ==> AMS+HB; HB ==> TF; realistic data; polled 3E9 TF ISPY events; saw one glitch
  • 1999-08-04 : Checked 2.5E10 ISPY words from FIB; one bit error
  • 1999-07-27 : OSPY test mode at 30 MHz used to feed Vertical Slice Test
  • 1999-06-04 : Fixed stuck DAD bit on one board ==> 2 fully working prototypes
  • 1999-05-20 : HF integrated into SVT "random test" at B0
  • 1999-05-18 : HF and GSTM (w/2 Tx cards) working together at 55 MHz (nominal=53)
  • 1999-05-17 : Checked ~ 3.7 GB sent through each of 4 fibers from one GSTM Tx and 1-4 splitter
  • 1999-05-09 : 50 Run IB events sent from GSTM (50 MHz) to HF; checked in OSPY
  • 1999-04-25 : PCB review at Fermilab
  • 1999-04-21 : Sent data to old-style Merger (24 MHz)
  • 1999-04-16 : 120 Run IB events processed (+checked) from ISPY to OSPY in test mode
  • 1999-04-03 : Boot chip configured 13 other Altera chips
  • 1999-03-24 : Received 2 stuffed boards from ADCO
  • 1999-02-17 : Sent 2 PCBs + parts to ADCO
  • 1999-02-11 : Received 4 prototype PCBs
  • 1999-02-01 : Gerber files mailed to Lugen for prototype
  • 1999-01-12 : U of C internal design review

    Note 1: Checked ~ 500M events (~ 800 GB) worth of spy buffer data (checking about 1.2 MB/sec), while sending ~ 200K events/sec (~ 290 MB/sec) in continuous loop (same 50 events repeated each time) from GSTM at 55 MHz for about a week

    Note 2: Ran ~ 13M events from GSTM (55 MHz) using randomly generated input data (different each event), randomly selected configuration constants (changed every 48 events), intentional random errors in input; checked OSPY + error register against emulator

    Note 3: Same as (2) but ~ 50M events and without introducing random errors

    Last updated on $Date: 2000/05/02 16:08:45 $