[widar-wg] Finished with B108-b-XX boards; test results; H/W faults found :-(
Ken Sowinski
ksowinsk at nrao.edu
Thu Jun 9 12:54:03 EDT 2011
On Wed, 8 Jun 2011, Brent Carlson wrote:
> 4. Board b108-b-6 seems to have a hard correlator chip failure, X0Y1,
> and should be replaced at the next opportunity.
I looked for this by tunning the script Cquad4 which configures
all the boards in quad 4 to produce eight subbands and all four
polarization products. Using d10 I found that 3Cx6C and 3Ax3C,
subband 7, produced garbage. Those products are developed,
respectively, in CCC9 and CCC10 of the X0Y1 CC on b108-b-6.
Antsol, as reported by the fringe display, was tolerant of this
failure and no sign of it was seen there.
Ken
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