Table of contents
Hardware Status as of 21. September 2011
Electronics:
All RCU modules plugged in.
Some HBAs may be oscillating from time to time.
Two LBAs were oscillating. Several LBAs with low power.
High Band Antennas:
All tiles are working. Two tiles (RCUs 179, 181) seem to be oscillating from time to time.
Low Band Antennas:
The LNAs of (the LBAs of) RCUs 74 and 112 are oscillating.
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 | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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.
Computer Status as of 21. September 2011:
Data Taking PCs
All data taking PCs are running.
The RAID "/media/scratch" on lofar2 is down due to a broken disk. The disk is replaced, but the RAID is not set up yet.
The new Dell machine(s) is installed, the LOFAR switch is said to be configured, but this needs testing.
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)
