TGBT14A_912_60 - Testing Bank to Bank discrepancies

Goals

  • Requantization balancing should be working now, but keep an eye on this.
  • Run Mode 3 / L-band and check Tsys/Ta variations
  • Run same configuration with closest Spectrometer mode, and see how that compares
  • Repeat for VEGAS with additional modes

Details

  • Take over at 8:00am. Will have to work around PF feed change
  • Galactic coords = (73,47), so quite far out of the plane
  • Start at 8:15am
  • Start with bank_gain_mode3_lband
  • Scan 1 fails - Antenna problem
  • Scan 2 - 60sec fsw track
GBTIDL -> getfs,2,ifnum=0
Scan:     2  units: Ta (K)  Tsys:  17.65
GBTIDL -> getfs,2,ifnum=1
Scan:     2  units: Ta (K)  Tsys:  17.62
GBTIDL -> getfs,2,ifnum=2
Scan:     2  units: Ta (K)  Tsys:  17.81
GBTIDL -> getfs,2,ifnum=3
Scan:     2  units: Ta (K)  Tsys:  17.48
GBTIDL -> getfs,2,ifnum=4
Scan:     2  units: Ta (K)  Tsys:  17.85
GBTIDL -> getfs,2,ifnum=5
Scan:     2  units: Ta (K)  Tsys:  17.46
GBTIDL -> getfs,2,ifnum=6
Scan:     2  units: Ta (K)  Tsys:  17.72
GBTIDL -> getfs,2,ifnum=7
Scan:     2  units: Ta (K)  Tsys:  17.97
  • Scan 3 - repeat
GBTIDL -> getfs,3,ifnum=0
Scan:     3  units: Ta (K)  Tsys:  17.35
GBTIDL -> getfs,3,ifnum=1
Scan:     3  units: Ta (K)  Tsys:  17.32
GBTIDL -> getfs,3,ifnum=2
Scan:     3  units: Ta (K)  Tsys:  17.50
GBTIDL -> getfs,3,ifnum=3
Scan:     3  units: Ta (K)  Tsys:  17.27
GBTIDL -> getfs,3,ifnum=4
Scan:     3  units: Ta (K)  Tsys:  17.41
GBTIDL -> getfs,3,ifnum=5
Scan:     3  units: Ta (K)  Tsys:  17.17
GBTIDL -> getfs,3,ifnum=6
Scan:     3  units: Ta (K)  Tsys:  17.34
GBTIDL -> getfs,3,ifnum=7
Scan:     3  units: Ta (K)  Tsys:  17.57
  • Scan 4 - bank_gain_mode3_lband_acs - only four windows
GBTIDL -> getfs,4,ifnum=0
Scan:     4  units: Ta (K)  Tsys:  16.27
GBTIDL -> getfs,4,ifnum=1
Scan:     4  units: Ta (K)  Tsys:  15.59
GBTIDL -> getfs,4,ifnum=2
Scan:     4  units: Ta (K)  Tsys:  16.69
GBTIDL -> getfs,4,ifnum=3
Scan:     4  units: Ta (K)  Tsys:  15.24
  • Scan 5 - repeat
GBTIDL -> getfs,5,ifnum=0
Scan:     5  units: Ta (K)  Tsys:  15.55
GBTIDL -> getfs,5,ifnum=1
Scan:     5  units: Ta (K)  Tsys:  14.96
GBTIDL -> getfs,5,ifnum=2
Scan:     5  units: Ta (K)  Tsys:  16.02
GBTIDL -> getfs,5,ifnum=3
Scan:     5  units: Ta (K)  Tsys:  14.62
  • VEGAS seems as stable as Spectrometer in this test.
  • system temperatures are different, but different bandpasses and RFI. Check system temps in a clean part of the band.

  • Switch to mode 21 (the mode Dana used)
  • bank_gain_mode21_lband - Scan 6
  • All balances seem ok, apart from Bank D - which is stuck at -10dB. But no error message - why not?
  • Scan 7 - repeat. Now Bank D looks ok
GBTIDL -> getfs,7,ifnum=0
Scan:     7  units: Ta (K)  Tsys:  16.85
GBTIDL -> getfs,7,ifnum=8
Scan:     7  units: Ta (K)  Tsys:  16.10
GBTIDL -> getfs,7,ifnum=16
Scan:     7  units: Ta (K)  Tsys:  21.11
GBTIDL -> getfs,7,ifnum=24
Scan:     7  units: Ta (K)  Tsys:  17.98
GBTIDL -> getfs,7,ifnum=32
Scan:     7  units: Ta (K)  Tsys:  16.28
GBTIDL -> getfs,7,ifnum=40
Scan:     7  units: Ta (K)  Tsys:  15.91
GBTIDL -> getfs,7,ifnum=48
Scan:     7  units: Ta (K)  Tsys:  17.79
GBTIDL -> getfs,7,ifnum=56
Scan:     7  units: Ta (K)  Tsys:  21.23
  • Individual spectra all look sensible (no obvious problems).
  • Tsys for all subbands in a Bank are identical (which is good).
  • Spot check of two banks, all sbNsnap values are -20dBm, as requested
  • What to do now?

  • Someone else is doing testing - is it Melinda? They are taking scans! Turns out it was Jonah testing PF1

  • Start again at 9:50am
  • Scan 11 bank_gain_mode21_lband-26 (target balance -26dBm)
  • input power and sbNsnaps seem to balance ok
  • Tsys 95k - boom is out? - yes - finally get it retracted...
  • Scan 12 bank_gain_mode21_lband-26. Input power and sbNsnaps balance ok
GBTIDL -> getfs,12,ifnum=0
Scan:    12  units: Ta (K)  Tsys:  15.48
GBTIDL -> getfs,12,ifnum=8
Scan:    12  units: Ta (K)  Tsys:  14.75
GBTIDL -> getfs,12,ifnum=16
Scan:    12  units: Ta (K)  Tsys:  19.15
GBTIDL -> getfs,12,ifnum=24
Scan:    12  units: Ta (K)  Tsys:  16.63
GBTIDL -> getfs,12,ifnum=36
Scan:    12  units: Ta (K)  Tsys:  15.13
GBTIDL -> getfs,12,ifnum=40
Scan:    12  units: Ta (K)  Tsys:  15.14
GBTIDL -> getfs,12,ifnum=48
Scan:    12  units: Ta (K)  Tsys:  16.56
GBTIDL -> getfs,12,ifnum=56
Scan:    12  units: Ta (K)  Tsys:  19.38
  • Scan 13 bank_gain_mode21_lband-14. Input power and sbNsnaps balance ok
GBTIDL -> getfs,13,ifnum=0
Scan:    13  units: Ta (K)  Tsys:  16.03
GBTIDL -> getfs,13,ifnum=8
Scan:    13  units: Ta (K)  Tsys:  15.04
GBTIDL -> getfs,13,ifnum=16
Scan:    13  units: Ta (K)  Tsys:  19.55
GBTIDL -> getfs,13,ifnum=24
Scan:    13  units: Ta (K)  Tsys:  16.91
GBTIDL -> getfs,13,ifnum=32
Scan:    13  units: Ta (K)  Tsys:  15.36
GBTIDL -> getfs,13,ifnum=40
Scan:    13  units: Ta (K)  Tsys:  15.41
GBTIDL -> getfs,13,ifnum=48
Scan:    13  units: Ta (K)  Tsys:  16.79
GBTIDL -> getfs,13,ifnum=56
Scan:    13  units: Ta (K)  Tsys:  20.04
GBTIDL ->
  • Scan 14 bank_gain_mode11_lband. Input power and sbNsnaps balance ok
GBTIDL -> getfs,14,ifnum=0
Blanked spectra: ignored 1 integrations
Scan:    14  units: Ta (K)  Tsys:  16.40
GBTIDL -> getfs,14,ifnum=1
Blanked spectra: ignored 1 integrations
Scan:    14  units: Ta (K)  Tsys:  16.36
GBTIDL -> getfs,14,ifnum=2
Blanked spectra: ignored 1 integrations
Scan:    14  units: Ta (K)  Tsys:  16.44
GBTIDL -> getfs,14,ifnum=3
Blanked spectra: ignored 1 integrations
Scan:    14  units: Ta (K)  Tsys:  16.36
GBTIDL -> getfs,14,ifnum=4
Blanked spectra: ignored 1 integrations
Scan:    14  units: Ta (K)  Tsys:  16.48
GBTIDL -> getfs,14,ifnum=5
Blanked spectra: ignored 1 integrations
Scan:    14  units: Ta (K)  Tsys:  17.01
GBTIDL -> getfs,14,ifnum=6
Blanked spectra: ignored 1 integrations
Scan:    14  units: Ta (K)  Tsys:  16.69
GBTIDL -> getfs,14,ifnum=7
Blanked spectra: ignored 1 integrations
Scan:    14  units: Ta (K)  Tsys:  16.77
  • Mode 11 looks ok - repeat! - Scan 15
GBTIDL -> getfs,15,ifnum=0
Blanked spectra: ignored 1 integrations
Scan:    15  units: Ta (K)  Tsys:  16.08
GBTIDL -> getfs,15,ifnum=1
Blanked spectra: ignored 1 integrations
Scan:    15  units: Ta (K)  Tsys:  16.04
GBTIDL -> getfs,15,ifnum=2
Blanked spectra: ignored 1 integrations
Scan:    15  units: Ta (K)  Tsys:  16.12
GBTIDL -> getfs,15,ifnum=3
Blanked spectra: ignored 1 integrations
Scan:    15  units: Ta (K)  Tsys:  16.05
GBTIDL -> getfs,15,ifnum=4
Blanked spectra: ignored 1 integrations
Scan:    15  units: Ta (K)  Tsys:  16.10
GBTIDL -> getfs,15,ifnum=5
Blanked spectra: ignored 1 integrations
Scan:    15  units: Ta (K)  Tsys:  16.74
GBTIDL -> getfs,15,ifnum=6
Blanked spectra: ignored 1 integrations
Scan:    15  units: Ta (K)  Tsys:  16.38
GBTIDL -> getfs,15,ifnum=7
Blanked spectra: ignored 1 integrations
Scan:    15  units: Ta (K)  Tsys:  16.49
  • Scan 16 - Mode 4 - Astrid hangs up - VEGAS fault;BankA Manager failed to activate - clears itself
  • All balances look ok.
GBTIDL -> getfs,16,ifnum=0
Blanked spectra: ignored 1 integrations
Scan:    16  units: Ta (K)  Tsys:  16.15
GBTIDL -> getfs,16,ifnum=1
Blanked spectra: ignored 1 integrations
Scan:    16  units: Ta (K)  Tsys:  16.16
GBTIDL -> getfs,16,ifnum=2
Blanked spectra: ignored 1 integrations
Scan:    16  units: Ta (K)  Tsys:  15.13
GBTIDL -> getfs,16,ifnum=3
Blanked spectra: ignored 1 integrations
Scan:    16  units: Ta (K)  Tsys:  15.72
GBTIDL -> getfs,16,ifnum=4
Blanked spectra: ignored 1 integrations
Scan:    16  units: Ta (K)  Tsys:  15.01
GBTIDL -> getfs,16,ifnum=5
Blanked spectra: ignored 1 integrations
Scan:    16  units: Ta (K)  Tsys:  13.73
GBTIDL -> getfs,16,ifnum=6
Blanked spectra: ignored 1 integrations
Scan:    16  units: Ta (K)  Tsys:  15.75
GBTIDL -> getfs,16,ifnum=7
Blanked spectra: ignored 1 integrations
Scan:    16  units: Ta (K)  Tsys:  21.48
  • Definitely not the same, but maybe RFI?? - Repeat
GBTIDL -> getfs,17,ifnum=0
Blanked spectra: ignored 1 integrations
Scan:    17  units: Ta (K)  Tsys:  16.25
GBTIDL -> getfs,17,ifnum=1
Blanked spectra: ignored 1 integrations
Scan:    17  units: Ta (K)  Tsys:  16.35
GBTIDL -> getfs,17,ifnum=2
Blanked spectra: ignored 1 integrations
Scan:    17  units: Ta (K)  Tsys:  15.21
GBTIDL -> getfs,17,ifnum=3
Blanked spectra: ignored 1 integrations
Scan:    17  units: Ta (K)  Tsys:  15.88
GBTIDL -> getfs,17,ifnum=4
Blanked spectra: ignored 1 integrations
Scan:    17  units: Ta (K)  Tsys:  15.05
GBTIDL -> getfs,17,ifnum=5
Blanked spectra: ignored 1 integrations
Scan:    17  units: Ta (K)  Tsys:  13.77
GBTIDL -> getfs,17,ifnum=6
Blanked spectra: ignored 1 integrations
Scan:    17  units: Ta (K)  Tsys:  15.79
GBTIDL -> getfs,17,ifnum=7
Blanked spectra: ignored 1 integrations
Scan:    17  units: Ta (K)  Tsys:  20.29
  • Repeat; Scan 18. Defintely seems to be a bank-to-bank repeatable pattern here...
GBTIDL -> getfs,18,ifnum=0
Blanked spectra: ignored 1 integrations
Scan:    18  units: Ta (K)  Tsys:  16.12
GBTIDL -> getfs,18,ifnum=1
Blanked spectra: ignored 1 integrations
Scan:    18  units: Ta (K)  Tsys:  16.22
GBTIDL -> getfs,18,ifnum=2
Blanked spectra: ignored 1 integrations
Scan:    18  units: Ta (K)  Tsys:  15.13
GBTIDL -> getfs,18,ifnum=3
Blanked spectra: ignored 1 integrations
Scan:    18  units: Ta (K)  Tsys:  15.76
GBTIDL -> getfs,18,ifnum=4
Blanked spectra: ignored 1 integrations
Scan:    18  units: Ta (K)  Tsys:  15.06
GBTIDL -> getfs,18,ifnum=5
Blanked spectra: ignored 1 integrations
Scan:    18  units: Ta (K)  Tsys:  14.23
GBTIDL -> getfs,18,ifnum=6
Blanked spectra: ignored 1 integrations
Scan:    18  units: Ta (K)  Tsys:  15.80
GBTIDL -> getfs,18,ifnum=7
Blanked spectra: ignored 1 integrations
Scan:    18  units: Ta (K)  Tsys:  20.22
  • Mode 7; Scan 19 - Aborts
  • Mode 11; Scan 20
GBTIDL -> getfs,20,ifnum=0
Blanked spectra: ignored 1 integrations
Scan:    20  units: Ta (K)  Tsys:  16.26
GBTIDL -> getfs,20,ifnum=1
Blanked spectra: ignored 1 integrations
Scan:    20  units: Ta (K)  Tsys:  16.26
GBTIDL -> getfs,20,ifnum=2
Blanked spectra: ignored 1 integrations
Scan:    20  units: Ta (K)  Tsys:  16.36
GBTIDL -> getfs,20,ifnum=3
Blanked spectra: ignored 1 integrations
Scan:    20  units: Ta (K)  Tsys:  16.28
GBTIDL -> getfs,20,ifnum=4
Blanked spectra: ignored 1 integrations
Scan:    20  units: Ta (K)  Tsys:  16.50
GBTIDL -> getfs,20,ifnum=5
Blanked spectra: ignored 1 integrations
Scan:    20  units: Ta (K)  Tsys:  17.01
GBTIDL -> getfs,20,ifnum=6
Blanked spectra: ignored 1 integrations
Scan:    20  units: Ta (K)  Tsys:  16.59
GBTIDL -> getfs,20,ifnum=7
Blanked spectra: ignored 1 integrations
Scan:    20  units: Ta (K)  Tsys:  16.69
  • All values of lbw_gain appear to be their defaults - Also for Scan 21!
  • Scan 21 - back to Mode 21
GBTIDL -> getfs,21,ifnum=0
Scan:    21  units: Ta (K)  Tsys:  16.16
GBTIDL -> getfs,21,ifnum=8
Scan:    21  units: Ta (K)  Tsys:  15.05
GBTIDL -> getfs,21,ifnum=16
Scan:    21  units: Ta (K)  Tsys:  19.99
GBTIDL -> getfs,21,ifnum=24
Scan:    21  units: Ta (K)  Tsys:  17.19
GBTIDL -> getfs,21,ifnum=32
Scan:    21  units: Ta (K)  Tsys:  15.55
GBTIDL -> getfs,21,ifnum=40
Scan:    21  units: Ta (K)  Tsys:  15.77
GBTIDL -> getfs,21,ifnum=48
Scan:    21  units: Ta (K)  Tsys:  17.03
GBTIDL -> getfs,21,ifnum=56
Scan:    21  units: Ta (K)  Tsys:  20.45

  • Scan 22 - Mode 7
GBTIDL -> getfs,22,ifnum=0
Blanked spectra: ignored 1 integrations
Scan:    22  units: Ta (K)  Tsys:  15.92
GBTIDL -> getfs,22,ifnum=1
Blanked spectra: ignored 1 integrations
Scan:    22  units: Ta (K)  Tsys:  15.95
GBTIDL -> getfs,22,ifnum=2
Blanked spectra: ignored 1 integrations
Scan:    22  units: Ta (K)  Tsys:  15.85
GBTIDL -> getfs,22,ifnum=3
Blanked spectra: ignored 1 integrations
Scan:    22  units: Ta (K)  Tsys:  16.30
GBTIDL -> getfs,22,ifnum=4
Blanked spectra: ignored 1 integrations
Scan:    22  units: Ta (K)  Tsys:  16.10
GBTIDL -> getfs,22,ifnum=5
Blanked spectra: ignored 1 integrations
Scan:    22  units: Ta (K)  Tsys:  16.33
GBTIDL -> getfs,22,ifnum=6
Blanked spectra: ignored 1 integrations
Scan:    22  units: Ta (K)  Tsys:  15.96
GBTIDL -> getfs,22,ifnum=7
Blanked spectra: ignored 1 integrations
Scan:    22  units: Ta (K)  Tsys:  21.16

  • Try mode 24 - direct analog of Mode 11 (number of channels, etc)
  • Scan 24 bank_gain_mode24_lband
GBTIDL -> getfs,24,ifnum=0
Blanked spectra: ignored 1 integrations
Scan:    24  units: Ta (K)  Tsys:  17.33
GBTIDL -> getfs,24,ifnum=8
Blanked spectra: ignored 1 integrations
Scan:    24  units: Ta (K)  Tsys:  16.13
GBTIDL -> getfs,24,ifnum=16
Blanked spectra: ignored 1 integrations
Scan:    24  units: Ta (K)  Tsys:  20.95
GBTIDL -> getfs,24,ifnum=24
Blanked spectra: ignored 1 integrations
Scan:    24  units: Ta (K)  Tsys:  18.49
GBTIDL -> getfs,24,ifnum=32
Blanked spectra: ignored 1 integrations
Scan:    24  units: Ta (K)  Tsys:  16.69
GBTIDL -> getfs,24,ifnum=40
Blanked spectra: ignored 1 integrations
Scan:    24  units: Ta (K)  Tsys:  17.00
GBTIDL -> getfs,24,ifnum=48
Blanked spectra: ignored 1 integrations
Scan:    24  units: Ta (K)  Tsys:  18.39
GBTIDL -> getfs,24,ifnum=56
Blanked spectra: ignored 1 integrations
Scan:    24  units: Ta (K)  Tsys:  22.42
  • Joe suggests this might be a blanking problem - change the swper to be much longer. Also, but in large blanking values
  • Try mode 21 again, longer swper - 8 sec swper and 64 sec integration time
  • Scan 25 bank_gain_mode21_lband
BTIDL -> getfs,25,ifnum=0
Blanked spectra: ignored 1 integrations
Scan:    25  units: Ta (K)  Tsys:  16.86
GBTIDL -> getfs,25,ifnum=1
Blanked spectra: ignored 1 integrations
Scan:    25  units: Ta (K)  Tsys:  16.86
GBTIDL -> getfs,25,ifnum=0
Blanked spectra: ignored 1 integrations
Scan:    25  units: Ta (K)  Tsys:  16.86
GBTIDL -> getfs,25,ifnum=8
Blanked spectra: ignored 1 integrations
Scan:    25  units: Ta (K)  Tsys:  16.20
GBTIDL -> getfs,25,ifnum=16
Blanked spectra: ignored 1 integrations
Scan:    25  units: Ta (K)  Tsys:  20.01
GBTIDL -> getfs,25,ifnum=24
Blanked spectra: ignored 1 integrations
Scan:    25  units: Ta (K)  Tsys:  17.89
GBTIDL -> getfs,25,ifnum=32
Blanked spectra: ignored 1 integrations
Scan:    25  units: Ta (K)  Tsys:  16.37
GBTIDL -> getfs,25,ifnum=40
Blanked spectra: ignored 1 integrations
Scan:    25  units: Ta (K)  Tsys:  16.32
GBTIDL -> getfs,25,ifnum=48
Blanked spectra: ignored 1 integrations
Scan:    25  units: Ta (K)  Tsys:  17.82
GBTIDL -> getfs,25,ifnum=56
Blanked spectra: ignored 1 integrations
Scan:    25  units: Ta (K)  Tsys:  22.33

  • Take tp_nocal scans with cal On and then with Cal Off. See what we get there.
  • Scan 26 - cal off - abort, and modify script
  • bank_gain_mode_21_lband_tpnocal
  • Scan 27 - cal off
  • Scan 28 - cal on
  • In calOn - line is much weaker!
  • repeat above two with 200 sec scan lengths
  • Scan 29 - cal off
  • Scan 30 - cal on
  • line strengths look good now.
  • Scan 31 - bank_gain_mode21_lband - to try playing with lbw_gain
  • Can't get new scripts running - give up at this point.
  • 2:50pm - finito!

-- RichardPrestage - 2015-01-13

This topic: CICADA > WebHome > GreenBankSpectrometer > CICADAGreenBankSpectrometerCommissioningLogs > CICADAGreenBankSpectrometer2015Jan13
Topic revision: 2015-01-27, RichardPrestage
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