Mesa boards for a measuring machine

Questions to Peter

I have an old Mitutoyo manual measuring machine with glas scales that outputs ~3.5V sinusoidal A/B.

Following Mesa boards is what I have and question is can the sinusoidal signal be used for positioning?
Short videoclip
Or is converting the signal to quadrature the only way?

1x 7i90HD
1x 7i42
1x 7i42TA
1x 7i37T

Will be using Gecko 320X to drive geared DC motors

You need a sine/cosine interpolator which we dont make
You might check into ICHAUS's demo interpolator boards