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operations:down_under_2015_10_20_minutes [2015/11/09 23:02] (current)
Ed Himwich created
Line 1: Line 1:
 +Oct 20, 2200UT
 +
 +Stuart and Rich not available ​
 +
 +6. Follow-up on clock breaks, Maser and A/C moved to different circuits.
 +
 +   ​Ed: ​ R4705had two small breaks at Ho, but no conclusive
 +   ​Brett:​ sees some jumps when 26m moves
 +   Ed: since we aren't recording frequency recording, could a frequency
 +        jump be induced to see if it causes a clock jump
 +   ​Brett:​ let us know when clock jumps occur in experiments
 +   ​Brett:​ will try looking at power monitor output data for issues
 +   Ed: asked Sergei for r4705 break information and will ask analysts to
 +        always specify details
 +
 +7. Final testing of windstow recovery fix.
 +
 +    Jim: will finish testing when antenna is up again, by Nov 1.
 +
 +8. NTP (pcfshb):
 +    a. pcfshb needs more stratum 1 servers, especially remote
 +
 +       Jim: will look for more stratum 1 servers
 +
 +    b. is cnsshb a CNS II clock directly serving NTP or through a TAC32
 +       ​program?​
 +
 +      cnsshb is a server, but also used by timehb running TAC32
 +      tac32ho connected to old TAC clock
 +      Brett: will make a a diagram
 +
 +    c. is tac32ho a TAC32 program connected to a CNS I or a CNS II clock?
 +
 +        CNS I
 +
 +    d. are there similar issues at other sites and/or 26m?
 +
 +       get Hb going first then transfer to other sites
 +
 +- from op comments: ​
 + 
 +1. FS failure R1708 Hobart26
 +> R1708: Wrong receiver to start with, FS failure, windstows.
 +Comments by op suggests this is the windstow recovery issue but not sure.
 +
 +Ed: couldn'​t find FS failure
 +Brett: need to use source=disable to re-connect to antenna rather than
 +          restart FS
 +Jim: filter out S/X receiver on axis comments from summary? TBD
 + 
 +2. Hobart26 R1708 had L band selected.
 +> - Receiver stuck in Lband Scans failed 278-1700 through 278-2217 (JS);
 +> 2157UT – OTTER interface reset (using '​r'​ command) and SX reciever put
 +> on axis (JS) [Have updated the setup notes to include this as a fix
 +for stuck
 +> reciever];
 +Exactly what is switched between L and SX? RF at the Mark 4 rack via a
 +relay?
 +
 +Brett: moved on axis mechanically,​ S/X is normally (almost) always
 +connected to rack by cable connection to
 +"​normal"​ (alt may be used for other bands/​experiments)
 + 
 +3. R1708  Yg Disc position problem.
 +> R1708: Disc pos ~120 GB behind schedule, inexplicably.
 +Dan suggested this could be caused by disk-record=on is late by the schedule
 +being delayed. Session A1524 Hb, last July it was caused by the weather
 +command sensor but also too many unnecessary checks. Dan can advise on
 +making the Mark5 commands respond faster if requested. ​  
 +
 +Ed: Preob takes 2 second too long
 +Jim: moved azeloff=0d,​0d,​ to sched_initi and removed !*+4s
 + 
 +4. Katherine r4709   (more for Ed’s review)
 +- Field system reboot after start of experiment
 +> Experiment started ok, except the command “clkoff-2” was still in the
 +proc file,
 +> so it recorded a huge delay difference. Halted the schedule after the
 +first scan.
 +> I couldn'​t find the right file, called Imogen to fix. (Ellen); 18:50 UT
 +– Imogen
 +> was unable to fix due “clkoff-2” to internet problems. I have changed
 +the settings
 +> in the log monitor so it won't ring alarms every scan.
 +
 +Jim: mark5 died, just changed control file  for other mark5 and restarted
  
/home/www/auscope/opswiki/data/pages/operations/down_under_2015_10_20_minutes.txt · Last modified: 2015/11/09 23:02 by Ed Himwich