Wouldn't the EASIEST solution be to restrict WHERE digital modes using the 2.8 kHz bandwidth are allowable? Something like, in short protecting the bottom 100 kHz of each band: 160m - NONE 80m - 3600-3650 40m - 7100-7125 30m - NONE 20m - 14100-14125 17m - NONE 15m - 21100-21200 12m - NONE 10m - 28100-28200 73 de Jim, KU0G