updates the internal dictionary and sends changed values to instrument
        Args:
            settings: parameters to be set
        # mabe in the future:
        # Returns: boolean that is true if update successful

def update(self, settings):
        '''
        updates the internal dictionary and sends changed values to instrument
        Args:
            settings: parameters to be set
        # mabe in the future:
        # Returns: boolean that is true if update successful

        '''
        Instrument.update(self, settings)

        for key, value in settings.items():
            if key == 'test1':
                self._internal_state = value