[evlatests] Antennas 13, 14, 16 and 18 at X-band

[Barry Clark]

>     No drops and phase oddities were seen, except that all four EVLA 
> antennas jumped 150 degrees in phase
> (w.r.t the VLA antenna phases) during an 8-minute gap in my observations 
> which occurred around 19:35 IAT.  I didn't get a log from the operator, 
> but received a message about this time saying something was changed.  
> Barry was at the site of the time, perhaps he can provide some insight 
> here.  Otherwise, phase behavior was normal. 

They installed an extra battery to ensure that the maser would stay 
powered during today's UPS maintenance.  In the process of doing so,
they managed to upset the VLA ten second tic.  I'm not quite sure 
why getting it started again makes a phase jump, but I guess I could 
believe it would.