This is a screen shot of a 25 year old Signet hat should be getting a new stylus soon out of my old stash.
Frequency sweep from 20 to 20k......markers are at 100,1k and 10k showing the channel separation and response.
View attachment 1164905
Red is right green is left.
You need to adjust the azimuth to get both channels to split the difference between them......35 dB for each would be the likely result.
Back when I had to make both empirical and listening tests of cartridges to resell I would always treat each one for evaluation as a complete blank slate cartridge/ turntable setup.
Microscope examination to see what the manufacturer's actual build tolerances were. You would be surprised how many manufacturers couldn't get the diamond mounted straight.
Sort through the supplied instructions to determine the design enginner's recommended tracking force, not the marketing nonsense but what VTF the designers expect to position the generating system in the nuetral location of it's movement.
Once the alighnment would be set, VTF set, a series of resonance, tracking, azimuth tests could be intertwined as the best tracking and channel separations settings could be found.
Then listening could proceed.
I am not talking about just skewed cantilevers.....I am speaking of the diamond mounted not square to the cantilever.
This is the art of persuasion in practice. I have an ohmmeter that is much more likely than my other two to read a cartridge as having matched channels. Guess which ohmmeter I like the best.
Or you can do this !!!!!.................
Nashou
XY does a nice job of that.