Current Status Summary

Modified 12:30, 1 Feb 2012 by horneff | Page History

1. Hardware Status as of 21. September 2011
1. 1. 1.1.1. Electronics:
  2. 1.1.2. High Band Antennas:
  3. 1.1.3. Low Band Antennas:
2. Computer Status as of 20. January 2012:
1. 1. 2.1.1. Data Taking PCs
  2. 2.1.2. Server
3. Important or Interesting Webpages

Version as of 14:14, 30 Apr 2024

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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 1.02.2012												104²		138	148²	150
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. 8.7.2011^A	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 1.7.2011^A	8	12	44		68	72		78		86			130		148	150		164	178
Wed 29.6.2011^A	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 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
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)

Table of contents

Current Status Summary

Table of contents

Hardware Status as of 21. September 2011

Electronics:

High Band Antennas:

Low Band Antennas:

Computer Status as of 20. January 2012:

Data Taking PCs

Server

Important or Interesting Webpages

Table of contents