VEGAS tests 20 December 2013

Goals

• test modes 20-29 during maintenance time (no telescope movement).

Plan

• run position and frequency switched scripts for each mode

Log

• Lbandmode20fsw -- failed because of balancing problem
• Manager has illegal value and bank B appears to be dead.
• Ray has diagnosed and fixed problem
• Lbandmode20fsw -- just bank A -- scan 2 -- works.
• Lbandmode20fsw -- Banks A & B -- scan 3 -- failed -- No data from either banks A or B.
• Lbandmode20fsw-- just Bank A -- scan 4 -- works.
• Lbandmode20fsw -- Banks A & B -- scan 5 -- failed -- no data found for either banks A or B.
• Lbandmode20fsw_bankAandB -- scan 6 -- failed -- BankBMgr
• Lbandmode20fsw_bandAandB -- scan 7 -- worked.
• Lbandmode20fsw_bandAandB -- scan 8 -- worked.
• Lbandmdoe20OnOff -- scan 9&10 -- (includes both banks A and B)
• Lbandmode21fsw -- scan 11 -- failed -- no received from either banks A or B
• Lbandmode21fsw -- scan 12 -- okay
• Lbandmode21fsw -- scan 13 -- okay
• Lbandmode21OnOff -- scan 14&15 -- okay
• Lbandmode22fsw -- scan 16 -- no data received from banks A and B
• Lbandmode22fsw -- scan 17 -- seemed to complete
• Lbandmode22fsw_noconfig -- scan 18 -- took out configuration and reran
• Lbandmode22fsw -- scan 19 -- checking Ray and Joe's fix
• Lbandmode22fsw -- scan 20 -- checking Ray and Joe's fix
• Lbandmode22fsw -- scan 21 -- checking Ray and Joe's fix.
• Lbandmode22fsw -- scan 22 -- checking fix again
• Lbandmode23fsw -- scan 23 -- changing modes to see if modes change appropriately
• Lbandmode20fsw -- scan 24 -- changing modes to see if modes change appropriately
• Lbandmode20fsw -- scan 25
• Lbandmode21fsw -- scan 26 -- changing modes to see if modes change appropriately
• Lbandmode22fsw -- scan 27 -- changing modes to see if modes change appropriately
• Lbandmode23fsw -- scan 28 -- changing modes to see if modes change appropriately
• Lbandmode24fsw -- scan 29 -- changing modes to see if modes change appropriately
• Lbandmode25fsw -- scan 30
• Lbandmode24OnOff -- scan 31&32 -- can it handle the switch between OnOff and fsw and mode 24 and 25 (different bandwidths)? -- yes.
• Lbandmode26fsw -- scan 33
• Lbandmode27fsw -- scan 34
• Lbandmode28fsw -- scan 35
• Lbandmode29fsw -- scan 36
• Lbandmode22OnOff -- scan 37&38
• Lbandmode23OnOff -- scan 39&40
• restarting LO1 and IF manager to get them back in system
• Lbandmode20fsw_bankAandB -- scan 41
• Lbandmode24OnOff -- scan 42&43
• Lbandmode25OnOff -- scan 44&45
• Lbandmode26OnOff -- scan 46&47
• Lbandmode27OnOff -- scan 48&49
• Lbandmode28OnOff -- scan 50&51
• Lbandmode29OnOff -- scan 52&53
• Had LO1 problems through the tests. so any frequency issues might be the problem for any frequency setting.
• tried to run Mode 2 using Dec8RRLXbandMode2SpecOnOff, which worked on Dec. 8. Astrid is producing an error:
  • "Error:1250 is an illegal bandwidth. Legal VEGAS bandwidths are: 11.72,23.44,100,187.5 and 1250"
  • restarted turtle
  • ran mode 2, then mode 20, then mode 2. Mode 2 configuration failed the second time.

Data Location

• /home/scratch/akepley/vegas_tests/mode20_29_test_20dec2013

Analysis

• For scan 2, I requested 5 spectral windows but gbtidl is showing 8. The extra spectral windows all have the same frequency as the first.
• Looks like extra ifs beyond those requested are at end and have frequency the same as the first window
• However, frequency setup doesn't always follow this pattern.
  • e.g., scan 36 should be