Is it safe to say that it is also useful in knowing which agency is transmitting on a shared frequency? (I just got my 125) While in Scan Mode, I'm assuming that if I have a code programmed to a channel and the agency emitting that sub audible tone is transmitting, then my scanner will show the alpha code naming that agency. For instance, ABC Fire Department (Programmed on channel 11) shares 154.22mhz with XYZ department (Programmed on channel 12). If ABC is talking to dispatch, then my scanner will tune to channel 11 instead of channel 12 even though I'm listening to a frequency that is actually programmed twice into my scanner. Having Alpha tags, I can then see WHICH agency is actually transmitting on the SHARED frequency.