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operations:station_checking_procedure

12m Antenna Check Procedure

Please check the station check schedule on the white board in the AuScope room BEFORE your shift.

  1. Send the antenna to (Az, El) = (1, 87) deg
    test1
  2. Wait for it to get there (look for flagr/antenna,acquired or watch the system monitor display). While you're waiting, Check the generator status:
    1. At Hobart and Katherine you can check the status of the backup generator via the System Monitor interface. The default mode is “In Auto, off” which means it's ready to turn on if there's a power failure but it's currently switched off. If it's in any other state, query it with the On Call person.
  3. Check that the RF and IF signal paths are correct and the attenuators are at their nominal levels. Refer to the notes on configuring the RF and IF signal paths
  4. Check the DBBC is properly configured:
    iread

    You will see what the current Conditioning module settings are. Output format is:

    <time>/<Module label>/<IF input number>,<Auto or Manual gain control>,<Nyquist filter number>,<Target power level>,<attenuation>,<actual power level>

    Check there’s agreement with what appears in the ifd8f definition in the procedure file. The actual power level should agree pretty well with the target level. The attenuation number can be anywhere between 0 (none) and 63 (maximum). If you see it at 0 or 63, it means the Conditioning module is having trouble getting the power to the right level. You may want to adjust the attenuators (see configuring the RF and IF signal paths) to get them back in range.

  5. Then type:
    bread

    You will see what the DBBC has set the BBC freqs to (compare with the .prc file). Output looks like this:

    <time>/<bbc name>/<Frequency (MHz)>/<Conditioning module in use>,<Bandwidth (MHz)>,...

    the Frequency, Conditioning module label and bandwidth should agree with the listing in dbbc8f8.

  6. Check the maser. See theHydrogen Maser check notes
  7. check that the clock offsets are in range
    clkoff
    maserdelay

    and check the difference reported in the log monitor

  8. Make sure Skype is running to allow a chat session with all participating sites plus the on-call person
  9. Use the “Audio test” button on the log monitor to check the alarms are audible.
  10. Measure the Tsys while at a high elevation
    systemp12
  11. There are a series of Az/El slews to move the antenna over it's full range. Type each of these commands into eRemoteCtrl in the order they appear. Wait for eRemoteCtrl to report flagr/antenna,acquired before continuing to the next:
    test1
    test2
    test3
    test4
    test5
    test1

    These commands send the antenna to the following set of (Az, El) coordinates in turn : (1, 87), (1, 6), (1, 45), (-269, 45), (269, 45), (1,87). The idea here is to exercise the antenna and log the results se we can look for any changes over the days that may indicate mechanical problems.

  12. Lastly, export the data collected by MONICA from the MONICA GUI as follows:
    1. Select “Export → ASCII Data”
    2. When asked for a file name, give the current obs code and station name (e.g. a1402hb), the word “check”, and end with “.txt”. For example:
      a1402hb_check.txt
    3. Select “Export → PNG image”
    4. As above but a “.png” extension. e.g.
      a1402hb_check.png
/home/www/auscope/opswiki/data/pages/operations/station_checking_procedure.txt · Last modified: 2015/02/02 09:39 by Imogen Jones