The Pro 96 cant discriminate between the encrypted or non encrypted signals, its not that the channels are scrambled, it the radio's that are being used. As Ibagli stated they are marked in the database here. When the system came online more were using encryption and it seems to have let up and there are more units in the open, IE: Wildlife, Watercraft are good examples of this. With the 96 you have the option of not programing the talkgroups that run encryption or put up with it and get the traffic that is in the clear. The newer GRE 500/600 use different technology and automatically block out the encrypted signals. Some agencies use encryption for sensitive comms, if you are recieveing alot of E type signals you may want to go thru your programing and lock out or remove the encrypted ones that are tying up your scanner. Hope this helps, Hoser