TIDA-00508 (tidu953 document) - questions

Hi Igor,

let me try to answer your questions:

Phase skew errors - what do they look like? Should I perform some thorough precise angle measurements to discover those skew errors?

- After magnitude calibration, there could still be phase errors, called skews. These can be reduced by the phase skew correction. The phase errors is quite random, and is due to many reasons including mechanical tolerance, near by metal, etc.

And next, about the 4-point calibration: is it really suffice - making only 4 angle measurements - to obtain all information needed about maximum and minimum peaks,

- Better calibration methods exit. But the 4-point method is simple, and not over killing.

about phase skew errors? It seems to me as if I've missed something...

1-turn calibration process - how embedded system knows that this very one turn is completed? What if rotation is only 90 degrees and then it rotates backward?

- The 1-turn calibration is done manually. The operator is required to rotate the target by at least 1 turn.

Automatic calibration process: please, explain me, how is measurement being done while the embedded system is still collecting the data to calibrate itself - does it

reliably know that the rotation is going on and the angle of rotation is approximately such and such?

- The algorithm looks for the peaks to calculate the offsets, then apply these offsets to the data. After one turn, all peaks have been found, so the offsets are stabilized.

Best regards,

Don