[evlatests] sub-band to sub-band changes

[Ken Sowinski]

On Wed, 7 Dec 2011, Michael Rupen wrote:

> We claim to be setting the requantizer gains such that the Psum for
> all basebands and all subbands should be ~14.2  This seems to be
> mostly working for the 8-bit, but not for the 3-bit side.
> This suggests we're not setting the requantizer gains at the right time
> in the script -- e.g., we may be adjusting the requantizer gains and the
> attenuators/gain slope equalizers at the same time, which would primarily
> affect the 3-bit paths.  This would not explain the other 3-bit Psys
> oddities of course.

Right.  I plan to check for this later today.  Another
(unlikely) possibility is that the 3-bit system is not
as stable as the 8-bit.