[evlatests] L302 phase changes.

[Vivek Dhawan]

Here is a broad brush summary of the phase changes in the L302
when they cross internal boundaries in their tuning plan. Not
good news.

F_L302         DDS
modulo      polarity
128MHz    mpol     cpol    Comment

   0      1 -> 0   0 -> 1   Not yet tested

   18     0 -> 0   1 -> 1   30-60 deg.

   27     0 -> 0   1 -> 1   good, few deg.

   32     0 -> 1   1 -> 1   ~120 deg.

   37     1 -> 1   1 -> 1   good, few deg.

   46     1 -> 1   1 -> 1   30-45 deg.

   65     1 -> 0   1 -> 0   90-120 deg.

   82     0 -> 0   0 -> 0   NYT (similar to 46?)

   96     0 -> 1   0 -> 0   ~120 deg.
                            some offsets have low amplitude.