[evlatests] 3-bit PDif Compression -- a clue?

[Michael Rupen]

>    I suggest our next experiment be done by deliberately reducing the
> power level to the samplers by a 2 dB or so -- probably also change the
> requantizer levels? -- to ensure that we don't get even close to
> overpopulating the end ladder levels of the sampler or requantizer...

A cleaner test would be to set the gains every now and then to
the "correct" values, and see whether Pdif changes in step with that change.
Or better yet, just step through attenuator etc. settings, and watch Pdif. 
Didn't we do this already?  maybe not with the 3-bit system... Anyhow
this would be a very easy test to do -- just modify the attenuator
test we did with Bin.

           Michael