@staticmethod
def _actual_phy(dphy, bit):
    """Return the actual output phase.
        Due to the resolution of the DDS, the actual output phase
        may be (a bit) different than the queried.
        :param dphy: Phase register value (int).
        :param bit: Number of bits used for the phase resolution (int)
        :returns: Actual output phase offset in degree (float).
        """
    return float(360 * dphy) / (1 << bit)
