[evlatests] phase jumps on ea02 B2D2

[Claire Chandler]

B2D2 is 3-bit.  Definitely Ka-band, I will check others.  Jerry already 
tried the jumper cable trick on Feb 21, it didn't fix it.

Claire

On Fri, 15 Mar 2013, Rick Perley wrote:

>    all bands?  some bands?  Only a 3-bit issue? 
>
> Claire Chandler wrote:
>>  ea02 B2D2 is still showing phase jumps in data from this week.  Does
>>  anyone know what could be causing this?
>>
>>  Claire
>>
>>  On Wed, 27 Feb 2013, Vivek Dhawan wrote:
>>
>> 
>> >  Hi Jerry,
>> > 
>> >  Phase jumps are still happening, after the cable fix.
>> > 
>> >  We are planning a '3-bit sampler therapy session' tomorrow and we will
>> >  look at this more - perhaps i have mis-diagnosed it.
>> > 
>> > 
>> >  Jerry Langevin wrote:
>> > 
>> > >  A cable was removed from Ant-02 L302-4.
>> > > 
>> > >  This should fix the problem.
>> > > 
>> > >  Jerry
>> > >  VLA LOIF
>> > > 
>> > >  Vivek Dhawan wrote:
>> > > 
>> > > >  Yes,it looks like the jumper cable needs adding/removing from ea02,
>> > > >  L302-4.
>> > > > 
>> > > >  p.s. antena 2 was out yesterday for FRM troubles.
>> > > > 
>> > > > 
>> > > >  Claire Chandler wrote:
>> > > > 
>> > > > >  In recent 3-bit data we are seeing phase jumps on scan changes on
>> > > > >  ea02, B2D2.  The phase jumps are the same for R and L 
>> > > > >  polarizations,
>> > > > >  and seem to have multiple, well-defined, phase states.  Is this 
>> > > > >  the
>> > > > >  symptom that is fixed by the jumper cables?
>> > > > > 
>> > > > >  Claire
>>>>>> _______________________________________________
>> > > > > 
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