TMS320F28374S: EQP gated and ungated doubt

Hi, 

Will you provide me more details about gated and ungated of QEP?

The logic is clear from the user guide. We just what to know what's the gate.

Quadrature encoders from different manufacturers come with two forms of index pulse (gated index pulse
or ungated index pulse) as shown in Figure 17-3. A nonstandard form of index pulse is ungated. In the
ungated configuration, the index edges are not necessarily coincident with A and B signals. The gated
index pulse is aligned to any of the four quadrature edges and width of the index pulse and can be equal
to a quarter, half, or full period of the quadrature signal.

Thanks a lot.

Br, Jordan