'cuts up'?? If you mean it gets interrupted, look to see if the priority, weather scan, Close Call, ect. have been turned on. There's been several messages about this very topic.
If you mean it sounds kinda distorted, you need to access the AGC menus and change the P25 level on the system you have programmed. You might even try asking about what levels folks use in your state's forum. That can often be a good place to start, but you might find that it would need some additional tweaking.
73 Mike