Specifies the states at which signal A and signal B must be while signal Z is high for the device to reset the measurement. If signal Z is never high while signal A and signal B are high, for example, you must choose a phase other than AHighBHigh. When signal Z transitions to high and how long it stays high varies from encoder to encoder. Refer to the documentation for the encoder to determine the timing of signal Z with respect to signal A and signal B.