TGBT15A_915_140 - More tests of wideband configurations for C-Band, X-Band, and KFPA

Goals

• Further tests of wideband VPM configurations for C-Band, X-Band, and KFPA for Tim Pennucci's GC magnetar project (AGBT17A _433)

Details

• Session begins at 15:15.
• Submitting VPM_C-Band_Test SB using vegas.scale = 14000 and rest frequencies of 4312.50, 5437.50, 6562.50, and 7687.50 MHz
  • Scans #1/2 are cal and search mode, with noise diode firing in each case for test purposes
  • Scans seemed to run fine
• Submitting VPM_X-Band_Test SB using vegas.scale = 14000 and rest frequencies of 8562.50, 9687.50, and 10812.520 MHz
  • Scans #3/4 are cal and search mode, with noise diode firing in each case for test purposes
  • Scans seemed to run fine
• Submitting VPM_KFPA_Test SB using vegas.scale = 14000 and rest frequencies of 19375.0, 20500.0, 21625.0, 22750.0, 23875.0, 25000.0, and 26125.0 MHz
  • Scans #5/6 are cal and search mode, with noise diode firing in each case for test purposes
  • Scans seemed to run fine
• Will check frequency precision in shared memory viewers in coherent mode now
• Submitting CoherentModeTests to take c0800x0512 and c0800x1500 cal mode scans
  • Got an abort, not sure why
  • Ah! It's the dopplertrackfreq issue! Added a ResetConfig command
  • The frequency precision looks OK except that Bank H is calculating the wrong center frequency. It's not getting the right sideband value for some reason.
  • Ray is trying to diagnose but doesn't see an obvious way this could happen
• Cannot solve now. Will do some spectral line checks
• Reverted back to old manager without the higher frequency precision
• Session ended at 16:34

Conclusions