Grasp a couple of points that someone who is used to consumer-grade scanners will find unusual:
1) Scan lists in Motorola subscriber equipment (such as the APX7000) are not tagged to "zones." Rather each channel is tagged to a "personality;" a "personality" is a collection of parameters that will be invoked when the channel is "selected" by the channel selector knob; and one of the parameters is the scan list that will be used if scan is invoked while that channel is selected.
2) Motorola scan lists come in four general flavors:
a) Limited to talk groups in one trunked system, and allows priority scan;
b) Permits talk groups in two (or more) different trunked systems, but no conventional channels and does not permit priority scan; and
c) Allows trunked talkgroups in one (or more) different trunked systems and one or more conventional channels, but does not permit priority scan; and
d) Allows only conventional channels, priority scan allowed.
Most experienced system designers will advise:
e) If using trunked talkgroups, limit the scan list to first type (single system, no conventionals), with priority scan enabled; and
f) If using conventional channel, limit scan list to conventional channels only (last type), with priority scan enabled.
3) Each scan list enables choices on a number of operating parameters:
a) First Priority (if used, my opinion in working radio should always be "Selected Channel," or else maintaining comms during scan will be difficult);
b) Second Priority (in my opinion, should seldom be used);
c) Allow operator to select non-priority channels (i.e., from the front panel). If enabled, this is invoked by user via the "SCANL" function assigned either to a button or a menu item; the menu item will only show up if the selected channel is tagged to a scan list that allows OpSel.
4) Note that Motorola subscribers, unlike scanners, are quite limited in the size of any given scan list, both for technical and philosophical reasons. A big scan list is problematic in a working radio. The limit in most cases is 15+1 (i.e., 15 designated non-priority channels plus the selected channel).
5) It may also be helpful to understand that how a receiver handles scanning is quite different for conventional channels and trunked talkgroups. To over simplify a bit:
a) For conventional channels, the radio steps sequentially through channels in order, testing each for valid freq and, if valid freq detected, then testing for valid tone and, if valid tone found, then suspending scan and gating audio audio until both (i) valid freq goes away and (ii) scan hang time timer expires.
b) For trunked talkgroups, radio parks on control channel, observing all of the group talkgroup channel grants are issued and comparing each to the TGIDs in the scan list. If valid, radio shifts to assigned voice channel and listens. At a certain point (varies depending on whether type of trunking message format used), radio reverts to control channels and resumes watching OSWs.
6) In order to view scan list formats, personality options selected and tagging, and trunked system message format, one would have to read the radio using CPS, which is why your questions can't readily be answered "in the blind."
