[widar-wg] WIDAR hardware work today

[Kerry Shores]

4 things were done today.

Replaced B108-b-6 (SN 2026) with a spare Blb (SN 2023). 2026 has a bad 
correlator chip, will be shipped to Penticton for repair.

Replaced the deformatter for ea13-B (S004-b-0, SN 004A). Middle channel 
on the deformatter now aligns correct (which means delays should now be 
known to be consistent). Unfortunately, now the bottom channel (INPUT C) 
has hard CRC errors on pin data[6]. This'll have to be replaced again in 
the near future (sigh).

Replaced a delay module on S006-b-1 (SN 006E), module 1 persistently 
reported errors. New module does as well. This station board will be 
pulled as soon as I have a working spare (the misbehaving delay module 
would only effect data in 3-bit mode, there are no 3-bit digitizers on 
ea22-B so we're OK for now...

Ran a thermal stress test. Things went pretty well, only 3 Baseline 
boards dislike thermal gradients. All boards are happy at a constant 
temperature. We likely have more than enough spare regulators to 
accommodate effing boards and provide long-term spares (my unofficial 
opinion).

The first 3 items (things I replaced, discovered) have all been entered 
into MITR.

-- 
Kerry Shores
Electrical Engineer
National Radio Astronomy Observatory
1003 Lopezville Rd.
Socorro, NM  87801
phn: 575-835-7158
fax: 575-835-7027