[evlatests] ae09 F317 more

[jjackson]

Two F317's and the Antenna 9 Slot ID module are on the cart ready to go 
back out tomorrow.  A third F317 has also been tested and is basically 
working but is awaiting replacement of an intermittent M&C fiber 
connector.

Luckily the M304 slot ID module checked out OK. Given the MIB failure we 
saw in one of the F317's installed yesterday, Wayne and I just had no 
confidence in that M304 until we could measure some voltages and verify 
it's programming on the bench. This type of driver/receiver failure has 
occasionally damaged M304's in the past.

Cheers,
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


Rob Long wrote:
> Never mind about M304, I should have read more carefully!
> 
> Rob
> 
> jjackson wrote:
>> 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.
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