The 7610-only FreqA gate broke CAT on the 7610 when FreqA was momentarily 0. Match DXHunter/WSJT-X: read FreqA first for all rigs, fall back to the generic Freq (IC-9100 etc.), then FreqB. OmniRig's generic Freq maps to VFO B on the 7610, which is why keying off FreqA is correct.