[evlatests] LO issues, various

[Vivek Dhawan]

After antenna moves and pointing, the following were noticed:

1. ea25 phase changes a lot when the antenna goes over the top -
    all IFs and bands show it, so probably the LO reference fiber
    or related cable is flopping about. We have seen similar things
    on other antennas.

2. L302 (non) return-to-phase - that pesky 128MHz cable / 20Hz synch.

    ea01, L302-2, L302-3.
    ea02, L302-2.
    ea10, L302-2.

    all antennas good with L302-1 and L302-4.