VEGAS Team Meeting
GB-137-hub
192.33.117.12##7144
434-817-6443# (telephone)
Attendees: Mark, Ray, Adam, Joe, Sam, Paul, Marty, Jason, John, Richard, Randy, Anish
Agenda:
- Status of MMCM calibrated BOFs for modes 2 & 3
- Status of Spikes in all modes
- "Top Hat" situation
- IF passband into ADC for Modes 1,2,& 3 [Watts] - Done?
- Test Time
Meeting notes:
- Status of MMCM calibrated BOFs for modes 2 & 3
- Potential cause of poor baseline performance in tests by D. Frayer.
- Temp data
- stabilize by keeping door closed for a while before calibrations
- Dave to do Mode 1 <--> Mode 2 comparison
- Care needs to be taken to be sure all the external parameters are the same for both tests
- Status of Spikes in all modes
- Next steps
- Try the shift setting tests recommended (ffff v. aaaa)
- no indication of underflow/overflow in "ffff v. aaaa" test (mode 4)
- Changed profile but hard to see any improvement. Power in passband lower on 'low side' and that is where spikes are evident.
- [Done] Recheck OGP(?) calibrations on the next maintenance day
- review the discussion last week concerning ADC calibration - did not have effect on spikes
- Need UCB to offer up fix - Marty to request status update
- Fix build environment (NRAO & UCB)
- "Top Hat" situation
- Case last night where it wasnt 1024 pixels wide (128 pixels wide in each subband (4) of 8-subband mode).
- Is a software work-around to detect the top hat and force a reset possible? (To avoid lost time from observers not checking their data).
- Should be able to detect in manager and trigger an abort which should trigger notification
- Also when scan is shortened
- IF passband into ADC for Modes 1,2,& 3 [Watts] -
- Test Time
- Wednesday
- ADC Re-calibrations [Ray, Marganian]
- VEGAS Mode 1 <--> Mode 2 comparison (after ADC recal) [Frayer]
- Other
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MartyBloss - 2014-09-08