I suspect you are better off to start fresh with a new Sage or DAS-DEC box. The only CAP converter I know if is the Gorman-Redlich box. A lot of LPFM's got those, but many are sorry now. The FCC changed the EAS rules a few months ago, and it questionable if the unit is still compliant. Gorman asked the FCC for a waiver to make it compliant, but I think that was denied. In any case, EAS compliance is a moving target. The FCC keeps changing their requirements. It's a good bet, they will do it again. Making old stuff work may ultimately be an exercise in futility. If you get it into compliance for today, it may not be tomorrow.