VEGAS Team Meeting

February 13, 2012


  • Dan Wertheimer
  • Mark Wagner * Glenn Jones
  • Andrew Siemion

  • John Ford
  • Jason Ray
  • Randy McCullough * Mark Whitehead
  • Patrick Brandt
  • Galen Watts
  • Marty Bloss * Anish Roshi

Meeting Notes:

Logistics for March tests and observations.
  • March 12 in GB is the plan. 4 rooms Jianth UC-b will do res
March Testing Status
  • Mode 1 working and tested at high clock rate more testing ok for march
    • filters will be ~1.25 GHz bandwidth (1250 MHz per roach)
  • Roach boards from UC-B for March test can be shipped this week.
    • Use one Roach for RFI sweeper and 6 others for observations.
  • Computers for test
    • We'll have one computer for each ROACH (7) but they do not have enough to store data locally (we will add storage (two disks: 2 or 3TB?). UC-B will bring a filer computer if needed if NRAO 'pork' is unavailable. All roaches and computers will attach to a 10 gbe switch. NRAO has the machines and the 10 gbe cards for them. Disk drives will be shipped directly to NRAO.
    • We could connect the roaches directly to the CPU's, and then connect all the CPU's to the filer via 1Gbit. UC-B will check that filer can handle aggregate data rate (2Mbit/sec to disk). Data will be stored in SDFITS and converted to PSRFITS offline.
  • IF/LO hardware
    • waiting for IF PCBs - arrived, will build two for RFI checkout then build balance.
    • ADC testing
  • Delivery of the borrowed ADCs in Green Bank by the 26th preferred.
    • NRAO Modification Request (MR) status: Noted as 'VEGAS' in NRAO Plan of Record
    • Software integration tasks
      • ADC sampling (I think Patrick was waiting on a Berkley dependency for this)
        • Mark W will add them and update BOF file this week
      • Whether Ron had supplied info to Patrick about the DDL for the Coordinator
        • No, Patrick will check
      • Roach switching signal tables
        • Code for setup in place, needs verifying
      • FW update for Roaches (again, Berkley dependency)

IF/LO setup software
  • UC-B can send some snap blocks for testing, Melinda working on Config.
    • Needs most of the system in place to test
  • Integrated testing of VEGAS manager with other GBT software and checking the data with GBTIDL.

Other VEGAS status:

MartyBloss - 2012-02-13
Topic revision: r1 - 2012-02-13, MartyBloss
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