VEGAS Team Meeting

Dial in Number: 877-937-8961

Passcode: 9445091#

Agenda:

Whole group:

1. Status of BOFs for Modes 2 and 3 (H16k)

GB only

1. "top hat" problem
2. Review of "known problems" from: https://safe.nrao.edu/wiki/bin/view/CICADA/VegasStatusUpdate
3. Differed Mode 10-19 tests until Joe returns
4. IF target levels
5. Plans for test time

Meeting notes:

Whole group:

1. Status of BOFs for Modes 2 and 3 (H16k)
   • Dan to check with Hong and send an update on anticipated delivery
   • Complete ripple tests when new Mode 2/3 BOFs are available/tested

GB only

1. "top hat" problem
   • Awaiting Joe
2. Review of "known problems" from: https://safe.nrao.edu/wiki/bin/view/CICADA/VegasStatusUpdate
   • high Tsys on first integration problem waiting for Joe
   • Some reports of ~20% varying Tsys across channels - team suspects calibration
3. Differed Mode 10-19 tests until Joe returns
   • Agreed
4. IF target levels
   • The table for the IF Rack balancing will be different since the attenuator settings in the Converter Rack will now have different values for VEGAS than for the Spectrometer
   • Anish / Galen - to confirm how the IF levels into VEGAS were set in the first place?
5. New issues
   1. "Bank E appeared to be a `sick' bank. It either dropped data during acquisition or failed to stop acquisition at the end of the scan in a few cases."
      • Manager has capability to capture this item Anish reported
   2. Calibration (ADC)
      • Calibrations no longer fails - should we change manager to remove use of configuration file for values?
      • Paul to do an analysis of the issue and report back to group with MR
6. Plans for test time
   • Unscheduled request(s): none until new BOFs are available
   • Tuesday
   • Wednesday
   • Thursday
   • Monday (8/18)
     • None at this time

Other

1. Please make sure to properly code your timesheets for the current time period and going forward.
   • Software engineers should be using a GBT ops software CM&E account - Account 893252
   • Electronic engineers should be using a GBT ops electronics CM&E account - Account 432510
   • Commissioning activities should be getting charged to hardware support and testing - Account 432510
   • Scientists assisting with shared-risk commissioning should be charging an observer support account
     • 432540 for the most part. Accounts 142020 (GB-based staff) and 142010 (CV-based staff) for when you are helping with overarching observing support (not problem solving, VEGAS specific)