def METHOD_NAME(self, data_df):
    """
    declare self.waves and self.calcs, our intercom data objects.
    """
    cols = data_df.columns.values
    wf_start = np.where(cols == 0)[0][0]
    wf_stop = len(cols)-1
    self.waves["waveform"] = data_df.iloc[:, wf_start:wf_stop].values
    self.calcs = data_df.iloc[:, 0: wf_start-1].copy()
    if "blest" in self.waves["settings"]["blsub"]:
      if self.waves["settings"]["blsub"]["blest"] == "fcdaq":
        self.calcs["fcdaq"] = data_df.bl.values