If running in AUTO/AUTO, program the FM with CTCSS/DSC and make sure you transmit the tone and publish to out to the FM users (and the digital user if they want to talk to them). Then when the repeater is operating digital, FM users will see the activity, but will not hear or be bothered with it. That is how I have mine set and it works great. Even for me since I do not yet have a digital HT, I can still access the machine on FM if needed and see activity if it’s C4FM. Great system.