If you are doing analog scanning with multiple frequencies, you don't set a channel with multiple frequencies. Program all your channels in like normal and assign all the ones you want to scan to a scan list and link it to your channel (or channels) you want to scan from. Then when you press scan you'll scan all the analog frequencies tied to that list. So if your position 1 is "City Fire Disp" and then you add "City PD" and "City EMS" and then add all three to the "City Scan" list, add "City Scan" to each of those three channels, then no matter which of those three you're positioned on, when you press scan, you'll monitor all three.
Look at the video
here.
