[evlatests] 3-bit status

[Michael Rupen]

There were a number of tweaks to the 3-bit system yesterday.  This is
my understanding of what I've heard -- please send along any corrections!


* New samplers in ea10, ea12; all old samplers removed from array

   We currently have all the first article sampler boards out on
   the array, with 4 samplers (2 modules) each in:

       ea06  ea07  ea10  ea12  ea14  ea26

   ea06, ea07, ea10, ea14, and ea26 have new T304s
   ea12 is still using old T304s -- we expect no fringes for A2C2, and
     possibly low amp on A1C1

   The old samplers will be returned to the array once Mike is done with
   them (primarily putting in the new firmware), probably next week.
   T304s for these will appear a few weeks thereafter.

   Note that the sampler that was in ea15-A1 looked quite dead when on the
   array.


* The monitor point on the d301/d303 reports the following
   serial numbers for the samplers currently on the array:

     ea06-d301  073 110921|1417
         -d303  115 110919|1109

     ea07-d301  121 110906|1727
         -d303  119 110907|0748

     ea10-d301  001 111003|0904
         -d303   67 111003|1705

     ea12-d301  085 111003|1323
         -d303   99 111004|0812

     ea14-d301  125 110912|1325
         -d303  127 110908|1556

     ea26-d301  blank ???
         -d303  123 110919|1421

     ea15, ea28: no 3-bit samplers any more

   Note that ea26-d301 has no serial number in there -- maybe Mike can
   fix this?


* Hichem fixed the MIB code per Barry's request, to ignore 3-bit
   power commands if the 3-bit sampler is already on.  This should
   eliminate various oddities we saw in our last tests (Tuesday I think?).
   The most prominent problem from those earlier data sets was a reset of
   the 3-bit samplers 15-20 seconds after the beginning of each 3-bit scan.
   I believe this at least has been eliminated (thanks Hichem!) but am
   waiting to hear back from Vivek about the more subtle issues.


             -- Michael