def __init__(self, instrument):
        """."""
        super().__init__(instrument)
        # self.log = logging.getLogger(__name__)
        # self.log.info('Creating an instance of\t' + str(__class__))

        self.amps = [-140, 17]
        self.freqs = [10e6, 40e9]
        # self.siggen.write("*CLS")  # clear error status
        # self.frequency = min(self.freqs)