The signal output of optical disk！

(TTL, TTL for long-term differential drive (symmetric A, A-; B, B-; Z, Z-), the encoder signal receiving device interface should correspond to the encoder. The pulse signal output of the encoder is generally connected to the counter for speed measurement. Such as single-phase connection, for one-way counting, one-way speed. A, B two-phase connection, for positive and negative counting, to determine the positive and negative direction and speed encoder.

As for the Z-phase signal I am not very clear, as if it is as a start bit, when the weekly rotation to a fixed position encoder will have a pulse signal to tell you after this special location, the device can be used as a special location mark It can also be used as a start bit for recounting after many consecutive revolutions. But no use of the Z phase can still count

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