The scanner doesn't "scan" through talkgroups as it does with conventional frequencies. It decodes the control channel and looks for talkgroup grants. If a grant matches something you have programmed in ID Scan mode, it tunes to the appropriate traffic channel. If a grant matches any un-avoided talkgroup in ID Search mode, it tunes to the traffic channel. It will simply ignore any grants for talkgroups that have been avoided, either temporarily or permanently.