Question, Fish, do u here a squawk at the beginning of the transmission like a databurst, then a bunch of ticks in between the garbled (or inverted talk)? I have know a couple of police depts to use rolling-code inversion and then switch to normal baseband inversion because of the audio trouble involved with it, the actually oscillating of the invert-frequency causes some discrepencies sometimes, which the depts would tell the techs when they would "switch over" or "go to security" as they called it. Inversion is an inexpensive and easy way to implement into a radio because agencies donot have to buy a whole new complete radio system like digital. The inversion modules are attached inside the radio, saving big money but not offereing the best encryption