TGBT14A_912_103 - VEGAS Bump Tests

Goals

• Repeat overnight bump tests

Details

• Start setting up at 7:00pm
• IF Manager is complaining about Bank H - just ignore this.
• bank_gain_mode7_long - C-band receiver, 5000MHz, tp_nocal, 1 sec integrations
• balance
• archivist
• Everything looks fine.
• Scan 1 - Track 300s - bump is clearly there in GBTIDL
• Scan 2 - bank_gain_mode21_long - bump also clearly there
• Scan 3 - bank_gain_mode7_21_long - set going half hour observations, but lost the archivist
• 9:10pm - restart with Scan 6
• stack up queue, and leave running with Dave.

Analysis

GBTIDL plots

Note: In GBTIDL, the spectra can only be processed using gbtidl-test!

• Mode 7 - Full spectrum:
  

• Mode 7 - zoomed spectrum:
  

• Mode 21 - Full spectrum:
  

• Mode 21 - baseline-subtracted spectrum:
  

Snapblocks

In the end, we obtained 18 1/2 hour scans, as follows:

• Mode 7: 4,7,9,11,13,15,17,19,21,23,25,27 (not quite half an hour) (12 total)
• Mode 21: 3,6,8,10,12,14,16,18,20,22,24,26, (12 total).

• scans 3 and 4 had no Archivist running!

For 16k time samples per ADC snapblock, and sampling at 1500MHz, this corresponds to 0.231 seconds worth of integration. We could also consider averaging four banks together.

-- RichardPrestage - 2015-06-09