VEGAS Team Meeting

February 25, 2013

Attendees

CALTECH, UC-B, & Columbia

NRAO:

Meeting Notes:

Latest test results

Action Items from Last meeting

1. Ray to make VEGAS simulator.
   • (25-Feb)
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
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.
   • (25-Feb)
5. All Banks not starting at the same time.
   • (04-Feb) (above)
   • (25-Feb)
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
   • (25-Feb)
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.
   • (25-Feb)
9. Remember to do the RFI test of the rack.
   • (04-Feb) Not yet scheduled
   • (25-Feb)
10. Roach to Valon serial port connection.
    • (04-Feb) Not yet implemented; not req'd for GC obs
    • (25-Feb)
11. The I2C bus software tested with the manager and Galen's modules.
    • (04-Feb) Post GC Obs
    • (25-Feb)
12. Add sftware version onformation into FITS file
    • (11-Feb) After GC obs
    • (25-Feb)

VEGAS observation preparation Status:

1. Long Artificial Pulsar Test
   • Longer (3-hrs) by Anish
   • Ray to look at start up issues and then many ~5 min scans
2. Request Ku-Band receiver installation
   • If long delay for installation, K-Band Pulsar test (reduced weather requirements)

Action Items:

Other items: