So, I think somebody from LMS should confirm if this behaviour (different levels between A and B channels, different values in WCDMA spectral density and constellation, wrt v1.2, possible phase noise degradation, receiver with lower sensitivity and other differences) is a symptom of a possible issue or problem with our v1.4 units or, at least, to explain in a deeper way how to discard it (assuming if so, v1.4 has worse performances than v1.2).
I was also reading some posts about some proposed Calibrations (TX and Rx), affecting once are completed (i.e. DB populated) also to working OpenBTS applications. Anyway, they are still not part of the Quick test (or a more extended one, with an step by step guide), and they should be the first steps to be completed by arriving enthusiasts (amateur, academic or professional) supporting the project, to verify in a rigorous way a full functionality of the unit, before to start a disappointing investigation and learning on the matters really we are interested in.
On the other hand, I fully support the preparation of an specific and more detailed User Manual, with descriptions, recommendations (to avoid thermal issues, ESD, with assembly guidelines, installation procedures, warnings, troubleshooting, calibrations, etc) apart from the Wiki.
I hope these issues can be clarified and solved in short time. May be I can contribute to it.
Sorry, but I'd like my expectations on this nice piece of HW were fully covered and, at this point (with a lot of work to do and stuff to learn with this board also from my side) I'm a little bit frustrated.