[evlatests] ae09 F317 more

[jjackson]

It turns out one of the F317's they tried yesterday had a bad MIB.  This 
blew the slot ID module port which then blows any any other MIB plugged 
into it.  We now have four blown F317's (now including the ones from 
Cryo and the test rack) and two blown Slot-ID modules (one in the 
antenna and one in the AOC test rack). These modules are all coming to 
the lab this afternoon to have LVDS driver/ receiver IC's replaced. This 
has been a rare occurance but once it happens we have to do them all or 
the problem will keep propagating. Wayne, Bede and I will be working on 
them this afternoon and tomorrow morning.  Antenna 9 is out of 
commission until we sort this out.


Jim Jackson
Project/Systems Engineer
Very Large Array(VLA) / Very Long Baseline Array(VLBA) radio telescopes
National Radio Astronomy Observatory
1003 Lopezville Rd.
P.O. Box O
Socorro, NM 87801
(575) 835-7132 (W)
(575) 835-0158 (H)
jjackson at aoc.nrao.edu


Steven Durand wrote:
> The 2 F317s do not communicate in lab either. Jackson will look 
> at them.
> 
> In the mean time please use the F317 that is in the CRYO test 
> rack.  Jim Gregg is OK with this.