Table of contents
Hardware Status as of 1. February 2012
Electronics:
All RCU modules plugged in.
One HBA oscillating from time to time. Two HBAs with one broken modem each.
Two LBAs were oscillating. Several LBAs with low power.
High Band Antennas:
All tiles are working.
The tiles 40/41 and 68/69 have one broken modem each.
The FE module 178/179-16 is oscillating. Tile 178/179 is sometimes oscillating at high power, this may (or may not) be caused bi FE module 178/179-16.
Low Band Antennas:
The LNAs of (the LBAs of) RCUs 74 and 112 were seen oscillating at some times.
Some (even-numbered) dipoles show little to no power in the spectrum (like as if the LNA is not working). The problem is not always consistent: some seem to recover without active intervention, some seem to recover after pulling and re-connecting the RCU.
Date | RCUs with low power in rcumode 3 | ||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Maintenance 16.10.2012 | * | * | * | * | * | * | * | * | * | * | * | * | * | * | * | ||||
Wed 1.02.2012 | 684 | 724 | 78 | 1044 | 1304 | 138 | 1482 | 150 | 1524 | 1784 | |||||||||
Wed 18.01.2012 | * | * | * | * | 72 | 78 | 130 | 138 | 148 | 150 | 152 | 178 | |||||||
Wed 21.9.2011 | 8 | 12 | 542 | 68 | 72 | 78 | 82 | 130 | 1381 | 148 | 150 | 1521 | 164 | 178 | |||||
Thu 11.8.2011 | 8 | 12 | 44 | 54 | 72 | 78 | 82 | 86 | 130 | 1381 | 148 | 150 | 1521 | 164 | 178 | ||||
Fri. 8.7.2011A | 8 | 12 | 44 | 68 | 72 | 743 | 78 | 82 | 86 | 130 | 148 | 150 | 1522 | 164 | 178 | ||||
Mon 4.7.2011 | 8 | 12 | 44 | 72 | 741 | 78 | 822 | 86 | 130 | 148 | 150 | 164 | 178 | ||||||
Fri 1.7.2011A | 8 | 12 | 44 | 68 | 72 | 78 | 86 | 130 | 148 | 150 | 164 | 178 | |||||||
Wed 29.6.2011A | 8 | 44 | 72 | 78 | 86 | 92 | 138 | 148 | 150 | 164 |
Notes:
A No attempt to recover signal by switching rcumodes done.
1Recovered after switching to rcumode 1 and back (a number of times)
2Showed changing power levels.
3 At 50-50 MHz about 10-15 dB reduced at 20 MHz about 30 dB reduced.
4 Normal power at some times, reduced power at others
* Replaced during maintenance visit, or before
Computer Status as of 20. January 2012:
Data Taking PCs
All lofarN machines are up
All lofarN machines have new RAID disks configured ad RAID5 (12.7 TB storage space in total per machine).
The lofarNa machines are installed and seem to be working.
Server
lofarsrv is up
Important or Interesting Webpages
- The LOFAR Wiki: http://www.lofar.org/wiki/doku.php?id=start
Needs a login to see anything. If simply registering is not enough, contact Arno Schoenmakers for more access.- Single station use at the LOFAR Wiki: http://www.lofar.org/wiki/doku.php?id=singlestation:start
With quite a bit of information on dealing with a station, but rather unstructured. - Technical operations contacts at the LOFAR Wiki: http://www.lofar.org/wiki/doku.php?id=operator:ilt_to_contacts
- Single station use at the LOFAR Wiki: http://www.lofar.org/wiki/doku.php?id=singlestation:start
- The international LOFAR schedule: http://www.astron.nl/lofar-schedule/schedule/schedule.php
(Stations not scheduled for an ILT observations are usually free for local observations)