Actually the best way is to build the scan lists for only those talkgroups you want to hear. If memory serves, that means running in closed mode (which is similar, if I understand it properly, to Uniden's ID Scan mode). In open mode (similar to Uniden's ID Search mode) you'll hear every talkgroup regardless of whether you want it or not.
The problem with running in open mode is that at some point you're going to hit the limit of how many tgs you can lock. Best to build something to the way you want to hear it
Like I mentioned in another thread, if you do this, eventually you're going to hit the limit of how many tgs can be locked out. Far better to create scan lists and run in closed mode...are you programming by hand or with software? If you're using Win96 or ARC96, no doubt someone here can help..
By hand press "Man" "PGM","TRUNK" in the bank you have the trunk system, scroll thru the TG's and L/O or delete the ones you don't want...You can press F+5 and use the closed mode, then while the trunk system is active press F+Trunk and you can see the "sub-banks with the TG's and press the #bank and lock it out....Those are banks 0-5.....