def set_up_correlation(corr, min_lag=None, max_lag=None, lag_resolution=
    None, alpha=None):
    """ No return type. Applies non-default values to correlator """
    if max_lag is not None:
        corr.max_lag = max_lag
    if min_lag is not None:
        corr.min_lag = min_lag
    if lag_resolution is not None:
        corr.lag_resolution = lag_resolution
    if alpha is not None:
        corr.alpha = alpha
