We wanted to make the OAF BLRMS ranges more useful, so we added notch filters to the OAF BLRMS channels based on their respective power spectra, which were dominated by lines at certain frequencies. In SDF, we unmonitored 105 OAF-RANGE channels so that we could make changes online without knocking the interferometer out of observing mode.

The OAF range calculation is not related to SENSMON range.