def METHOD_NAME(self, att, enable, led=False):
    """
    Set attenuation, RF switch, and LED state (SI units).
    :param att: attenuator setting in dB (0-31.5)
    :param enable: RF switch state (bool)
    :param led: LED state (bool)
    """
    self.set_mu(self.to_mu(att, enable, led))