I've been trying to get SDR Sharp and Plane Plotter working to decode ACARS. I tune to one of the designated ACARS frequencies (ex. 130.55 AM) and wait for the squawks. I live in NYC so there is a lot of airtraffic. The signals are routed via VAC to Plane Plotter. I tick the ACARS selection in I/O. I see that there is a signal but no data appears even though I can hear the ACARS sigs. And yes, SDR Sharp is output to Line 1. Does the ACARS signal have to be very, very strong? It's there but not super strong. Is there something I'm missing?