def METHOD_NAME(self):
    self.core.break_realtime()
    self.dev.init()
    # clear backing state
    self.dev.att_reg = 0
    att_set = 0x12345678
    self.dev.set_all_att_mu(att_set)
    # confirm that we can set all attenuators and read back
    att_get = self.dev.get_att_mu()
    # confirm backing state
    att_reg = self.dev.att_reg
    self.set_dataset("att_set", att_set)
    self.set_dataset("att_get", att_get)
    self.set_dataset("att_reg", att_reg)