TGBT14A_912_89 - Troubleshoot latest VEGAS problems

Goals

  • Troubleshoot latest egregious VEGAS problems, with a focus on switching signal distribution system

Details

  • Get set up at 7:30am
  • Using old (release) version of VEGAS, BOFs, etc
  • Set up for A,F,G,H so that we can see what switching signal master is up to.
  • Initial test, check the problem is still there (xband, hi cal)
  • bank_gain_mode4_xband
  • archivist
  • balance
  • track
  • scan 1: Tsys varies from 62 to 4874K ! pol 0 is by far the worst this time.
  • Tsys = [4874.33, 554.93, 168.59, 81.34, 112.78, 109.36, 99.99, 62.35]
  • scan 2: repeat. Tsys = [5627, 571, 171, 81, 111, 115, 102, 62]
  • so, very consistent from scan to scan.
  • switch to mode 1
  • scan 3: Mode 1 Tysys looks very consistent, around 35K
  • scans: 4 - 9: AutoPeak - Tsys ~ 27K and very consistent
  • scan 10: Mode 4. Problem still there.
  • Appear to be running with NEW manager, but OLD BOF
  • lbw_gain is set to 4294967295 for Bank F, 4294967295, for Bank A, etc...
  • scan 11 - old manager, old BOF - goes back to the slightly faulty, normal behavior
  • 8:45am - go home again.

-- RichardPrestage - 2015-04-11
Topic revision: r1 - 2015-04-11, RichardPrestage
This site is powered by FoswikiCopyright © by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding NRAO Public Wiki? Send feedback