[evlatests] more 3-bit samplers

[Ken Sowinski]

Pairs of DTS modules were installed in ea06 and e26 today.

The pair in ea26 was only made to work late in the day and
has not been tested at all.

The pair in ea06 works, but there may be a T304 problem.
There is plenty of power into the T304, but all four channels
(two in IF A and two in IFC) have very little output power
even with the output attenuators wide open.  These tests
were made at C band.

During tests fringes were obtained between three antennas
in both of the AC IF pairs, and between seven antennas in
the A1Ca IF pair.  Data is in hand to allow a preliminary
sensitivity estimate for all the IFs for all antennas but
ea26.