[evlatests] ea02-l302-2

[Vivek Dhawan]

Dennis Polyard checked the L302 on the bench, and saw nothing wrong
except the 20Hz synch signal was not getting into the module. This
would result in the phase being set at an incorrect time, so it
explains the symptoms we saw, i.e. correct frequency but random
phase every time it reset.

He has fixed the module and returned it to the array in ea10 L302-2.
Antenna 10 shows no phase problems. Antenna 2 continues to behave
well - so the issue is resolved.

On 09/30/2013 02:45 PM, Vivek Dhawan wrote:
> Hi all,
>
> 1. The problem is completely fixed.
>
> 2. To help Dennis re-create it on the bench, I suggest setting up
>     2 synthesizers identically and commanding them at the same time,
>     and sending the same frequency+phase every time. The one (that
>     was) ea02-L302-2 was showing phase jumps every time it got a
>     command, but had stable phase in between commands.
>
> On 09/27/2013 10:56 AM, Jerry Langevin wrote:
>> Doug and I swapped out the L302-2 on antenna 2 for the phase jumps. If
>> someone could look at the data and tell if this fixed the problem.
>>
>> Jerry
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