Target Fields radio system is A Mototrbo System, and most radio comms are on that.
HCMC EMS crews are usually found on HCMC EMS Tac 4, most traffic hear is coordinating getting an ambulance to do a transport - Stadium EMS crews are on TRBO.
Very little MPD traffic usually
The cleaning crews are on a UHF conventional system, and some of the parking lots around the field are on UHF conventional-
Not a lot to hear.
I brought a scanner once with low expectations to find anything and as expected found nothing of interest, haven't brought it since.