I'm a newbee to scanning trunked systems and I've been having a rough time finding frequencies to enter for the trunked system in my area. Here is what I've got: A Whistler WS1040 scanner with ARC500 software. I know the trunk system is starcomm21 and I have the Norrdge, Harwood Heights and Schiller park talk groups but what gives me trouble is finding the frequencies for the trunk system. When I look up Norridge on RadioReference.com it show the starcomm21, the talk group and it says that its patched to 471.2875 which is the old analogue frequency. I've searched high and low and I can't find the right frequencies. I found a list of 365 frequencies used by Starcomm21 in illinois but the software only has room for 32. Please someone help me get this set up properly.