[evlatests] generator testing side-effects

[Ken Sowinski]

On Tue, 19 Feb 2019, Ken Sowinski wrote:

> During the generator testing last Wednesday I recorded 48V powerplant
> voltage and current from the M302, and sampler temperatures for all
> four modules at the antennas chosed to be distributed over all three
> arms and the master pad.  The antennas used were:
> West arm:  ea01, ea02, ea28 (master pad)
> North arm: ea04, ea06, ea11, ea15
> East arm:  ea10, ea16, ea23
>
> This is the first of two notes and describes the overall antenna and
> power plant response.  The second will describe the sampler behavior.
>
> An unexpected result is that about half the antennas suffered a
> communication outage when AC power was removed from the antenna.
> At least one antenna on the East arm had communications restored
> before AC power was restored.  The antennas which experienced
> a communication outage are:
>
>   ea28, ea06, ea11, ea15, ea10,

During the generator tests of last Wednesday, Feb 27, I monitored
the east arm antennas with the following results.

Network unaffected:  ea05, ea06, ea16, ea21, ea23
Network lost:        ea10, ea14, ea27

The three antennas that were monitored both a week ago and this
time behaved the same way on both days.

ea06 returned power plant voltage as exepcted, but always zero for
current.

ea12 is on the east arm but I neglected to notice that.