I noticed on my pro 106 I picked up a 700 frequency it was perfectly clear. Any ideas. Macomb County (Michigan). Found the Frequency 796.46250. Not sure who it belongs to but to some public safety group.
Same thing happened to me not long ago while using my PSR-600. I kept hearing law enforcement traffic in the upper 700 MHz range but I knew there was no one within at least 250 miles using this band. After listening for a while I was able to determine it was one of the bordering county sheriff's office agency's dispatch channels, as I could switch back and forth from where I was hearing them on 700 MHz and their actual trunked channel, which is a Motorola Type II P25 system utilizing the rebanded 800 MHz set.
I thought I was going crazy though. Turns out it was just the scanner playing tricks. Whew . . .