I got the 24 Channel SSL Alpha Link Converters. The thing is, the 4K channels don't pass the same levels from input to quad-bus output if set to unity gain. This is what I want to align and I wonder how to get there.
I believe precise alignment between console and converters on all channels is important so I can trust all channels to behave the same.
Of course the question is, where to align, at the master, at the channels, and at what cards?
EDIT: I found a document entitled
Service Calibration Procedure
611 I/O Module Calibration
18 September 1996
Issue 1.01
It answers the 611 Channel alignment questions.