Yes you can set it up like that...the 500/600 has 20 programmable scan lists plus a FAVorite and a SKYwarn list that you can put what you want to in..so there are really 20 all at once, OR the favorites, OR the skywarn.. You can enter unlimited TRNK Systems I.E. their freqs. and Talkgroups, and/or Conventional Freqs, along with sweeper modules, search modules , and close call modules, (up to the memory maximum) in any combination in 20 + 2 scan lists...you can associate any single frequency and or talkgroup in one or all 20 scanlists which you can turn on and off at will