[evlatests] Antenna 23 Cables Removed Check
Michael LeBlanc
mleblanc at nrao.edu
Wed Dec 6 21:32:07 EST 2006
To all,
I verified the cables removed from Ant 23 12/06. Please see results
below by Module type.
Other than minor issues, the cable harnesses looked good.
L302-1 Timing J3-2 wire not crimped & exposed.
Timing J4-1 pin not seated in connector, pushed back but
not all the way out.
L302-2 No Problems
T305-A No Problems
T305-B No Problems
T305-D Timing J3-2 pin not seated in connector, pushed back but
not all the way out.
T305-C No Problems
L302-3 No Problems
I suspect that the problem we saw deals with the timing issue for cable
L302-1. The exposed wire may have shorted between the other wire and/or
bin. The main reason I believe this, is if you noticed the location of
L302-1 & where we had issues of modules not communicating. All modules
after L302-1 were not working. These module's timing signals J3 & J4
would be "daisy chained" from the L302-1.
Also no shorts and/or broken connections were found in the SLOT ID part
of the wire harnesses.
I suggest we attempt to reproduce in the Test Racks.
We installed the cables tested in Antenna 23 & all modules work
communicated & received the Slot ID.
Thanks,
Mike Le Blanc
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