[evlatests] ea20 pointing fixed

[Ken Sowinski]

On Fri, 2 Jul 2010, Ken Sowinski wrote:

> On Tue, 29 Jun 2010, Doug Whiton wrote:
>
>> Well...  We suspected the power supply, but it seemed to be ok when we
>> checked it and the encoder started working too.  We replaced the supply
>> anyway.
>
> After this the periodic tracking error in elevation was repaired.
> A pointing run last night for the moved ea06 shows that ea20 is
> now much better.  There were small changes to tilt and az encoder
> zero, and the post-fit statistics are much improved over the last
> pointing run.

This remained true for the July 7, pointing run, but the error
appeared to back in full force during a pointing run Friday night.
There will be a 3 dB tracking terst tonight to verify that there
is a problem.