VEGAS Team Meeting

May 20, 2013

Attendees

CALTECH, UC-B, & Columbia

Dan, Jayanth, Glenn, Andrew

NRAO:

Jason, Marty, Mark, Randy, John, Richard

Agenda:

1) When should Berkeley visit (~1 month - GB avails - CIS avails) Marty to check. List of folks yet to respond: Chris Ray Anish Hong Dan

2) Observed the magnatar - detection seems there - kfpa obs tonight. Data looks good.

• An Italian group will use VEGAS & GUPPI too and both teams will share data. Setup will be tricky

3) Modes H1k (done), All modes are working but one mode is not working at fastest (1.5 GHz B/W) mode. Ready to send to GB for testing

• GB configurations may need to be set up before testing can begin (Mark & Ray) need to talk.

Meeting Notes:

Next Teleconference: May 13, 2013 .

Long-term action Items

1. Ray to make VEGAS simulator.
2. A BOF for mode 13, or some other mode that uses GPUs.
   • (04-Feb) Not available yet
   • (11-Feb) 16 input version compiling now for subsequent test
   • (04-Mar) Should be ready to test in GB ~7-Mar
     • Need to refine what tests are done in Berkeley v. GB
       • Noise + tone tests in Berkeley
       • Replicate in GB (one Roach)
       • Build-out to eight Roach boards
       • Test on GBT
3. A BOF with working switching signal logic.
   • (04-Feb) designed but still troubleshooting switching table loading issues
   • (11-Feb) Added to design for Mode #1
   • (11-Feb) Add sfp shift into manager
4. A test and decision on what computers to buy.
   • (04-Feb) Not yet determined - Jayanth should go ahead with his tests to complete selection
   • (04-Feb) Needs HPC11.
5. All Banks not starting at the same time.
   • (04-Feb) (above)
   • (04-Mar) Resolved
6. It will be good if we get the full spectral dynamic range corresponding to the 8 bit ADC in the next version of mode 1.
   • (04-Feb) Conduct initial tests at Berkeley, to see if there are any limiting issues for dynamic range and optimize
   • (04-Feb) what is/are the requirement(s) w.r.t full scale sin wave?
   • (04-Feb) is this a new requirement for the manager (yes)? is a parameter required to select between options? (parametrized shifting)
   • (04-Feb) what are requirements for shift parameter? depends on result of studying spectra...
   • (25-Feb)
7. KFPA observation with mode 13.
   • (04-Feb) awaits mode 13
8. Manager/VEGAS HPC code that will let two instances of the program be run simultaneously.
   • (04-Feb) not available, but not required for GC obs.
9. Remember to do the RFI test of the rack.
   • (04-Feb) Not yet scheduled
10. Roach to Valon serial port connection.
    • (04-Feb) Not yet implemented; not req'd for GC obs
11. The I2C bus software tested with the manager and Galen's modules.
    • (04-Feb) Post GC Obs
12. Add software version information into FITS file
    • (11-Feb) After GC obs
13. Confine UDP and packets out of the subnet within the VEGAS switch

Other items:

-- MartyBloss - 2013-05-20