Moryoga, Azimuth is a mechanical alignment of the needle in the groove, and is probably best set mechanically (visually-microscope). The fosgometer measures a voltage, as a surrogate marker for alignment. There may be discrepancies in the phonostage so best to leave this out of the circuit. There may be an electrical imbalance in the cartridge, and it would be wrong to misalign the needle to compensate. I would also try another test record, they are not perfect, and I have very different readings on the "fos" with different records.
For me it is all too hard, and I don't trust the test record, and I don't trust that electrical output means physical alignment. I suspect some high tech oscilloscope using a calibrated test record, minimising cross talk is the only "practical" way to do it properly.
Another way is, if it ain't broke don't fix it, in other words if the sound is good don't fiddle:)
That's as far as I've got, happy to learn from others.
For me it is all too hard, and I don't trust the test record, and I don't trust that electrical output means physical alignment. I suspect some high tech oscilloscope using a calibrated test record, minimising cross talk is the only "practical" way to do it properly.
Another way is, if it ain't broke don't fix it, in other words if the sound is good don't fiddle:)
That's as far as I've got, happy to learn from others.