After our windstorm, finally ready to get back to OBSERVING, but we had SDFs for PR3 (I could have sworn we had SDFs for PR3 at the beginning of the shift when we were racing to address the piles of SDF Diffs we had so we could get to Observing.).  At any rate, the (3) channels are for Enabling the Input for (3) PR3 channels (see that attached photo of the SUSPR3 Diffs which were ACCEPTED).