I've noticed for the last 2-3 weeks that audio from UP dispatchers in my area seems to have some weird modulation or distortion. I first just thought it was my scanner, but I get the same thing on 2 different scanners and 2 different Motorola receivers that I have tried. I also hear the same thing from different towers, not just one. Any audio that I receive from trains or defect detectors sounds fine, just the dispatcher. I've included a sound file for reference.
Any ideas what is causing this?
Dropbox - 201906090837-572678-29632.mp3 - Simplify your life
Any ideas what is causing this?
Dropbox - 201906090837-572678-29632.mp3 - Simplify your life