[evlatests] 3-bit status

[Michael Rupen]

ea12 A1C1 indeed looks normal at first blush.
ea12 A2C2 may have other issues -- certainly there is no power coming
   through.

               Michael

>>     ea12 is still using old T304s -- we expect no fringes for A2C2, and
>>       possibly low amp on A1C1
>
> We expect weak/noisy fringes (low total power) for ea12 A2C2.  We expect 
> normal amplitudes on ea12 A1C1.
>
>
>
> Michael Rupen wrote:
>>  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
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>
>