01 January

2011 Jan 10

James M Anderson, Masaya Kuniyoshi, and Andreas Horneffer went to Effelsberg to check on a broken rubidium clock and swap out broken RCU boards.

The rubidium clock produces a 5 MHz sine wave output, but no 10 MHz output nor the 1 PPS output.  The LOFAR station is totally useless without these signals for operation.  Menno Norden at ASTRON contacted to find out whether or not they have a spare.

RCU board changes:

RCU8: 638001069(old)  -->  063002013(new)

RCU12: 06-38-002-049(old)   -->  06-32-001-086(new)

RCU44: 0638002087(old)  -->  0638002012(new)

RCU54: 0638002061(old)  -->  06-32-002-039(new)

RCU68: 0638002067(old)  -->  06-32-002-024(new)

RCU130: 0638002064(old)  -->  0638001042(new)

RCU138: 0638001019(old)  -->  0638002081(new)

RCU150: 0638002051(old)  -->  0630002017(new)