[evlatests] Monday ACU / OTF testing

[Vivek Dhawan]

Summary of Monday test:

The conditions were as follows (From Doug Whiton):
-------------------------------------------------------------

We will have someone in Ant.1, 14 and 21.
Ant.1 will have no adjustment to the bias(10%).
Ant.14 bias is 15%.
Ant.21 bias is 20%.

Doug

-------------------------------------------------------------

1. Command errors are gone - (large changes in commanded position, from
    interpolation errors). The executor update took care of it.

2. ea01 no modifications, still oscillates. Cougar was in the antenna
    and apparently hit the e-stop to stow the antenna several times
    so as to stop the oscillation. We should get his report.

3. ea17 also no modification, still oscillates, larger errors when
    tracking fast forward than fast reverse. There are also some
    brief error spikes of duration ~1sec and magnitude 1arcmin.

4. ea14 and 21 - both look better than the unmodified antennas.
    There are still some oscillations, mostly during fast-forward
    but they are lower amplitude than before. Also occasional
    error spikes like ea17.

So, overall, things are better. But there are two things to work
on a bit more:

(a) There are occasional errors in timestamp of command - the command
appears to be identical to the previous one, which is not real but the
sampling has caught the same one twice. This is true of new antennas,
so it is in addition to the 104ms sampling on the old-ACU mibs. To be
re-visited after Hichem returns.

(b) I wiped out the collected encoder data after the first 10 min.
(I do not type fast, but I think slower). I'm working on getting
it via the pointing table which is intact. if any conclusions
change I'll send an update.

------------------------------------------------------------

On 4/18/2016 9:34 AM, Vivek Dhawan wrote:
 > OK, we will include it in the test - Thanks Doug.
 > I assume ea01 is the antenna you will be at/on ?
 >
 >
 >
 > On 04/18/2016 09:26 AM, Doug Whiton wrote:
 >> There are no problems with Ant.1. Operator error.
 >>
 >> Doug


On 04/18/2016 08:51 AM, Ken Sowinski wrote:
> On Sun, 17 Apr 2016, Ken Sowinski wrote:
>
>> On Fri, 15 Apr 2016, Vivek Dhawan wrote:
>>
>>>  I'm sending this before I forget -
>>>
>>>  Monday plan, let me know if this works for you:
>>>
>>>  1. 10AM is a good time to start a ACU/OTF test, it is about 20
>>>    minutes before transit for the file we have (source 3C454.3,
>>>    2258+16).
>>>
>>>    Ken: is it possible to run this under the test executor for the
>>>    interpolation fix?
>>
>> I will check with Rich to see of the test version has been
>> built recently.  It might be easier to avoid transit.
>
> The test version of the executor can be used for this if needed.
>
> Bruce will be using rack 8 baselie boards again so we should avoid
> those if possible.
>