I have entire State P25 trunked systems in my G5. For example, GA SEGARRN, SC Palmetto, NC Viper, etc. I then have every State Police talkgroup covering I-95 through those States set to one knob position. I also have all the site control and alternate frequencies for the sites that cover I-95. I then named the Zone I-95. I can literally start at the FL/GA line at knob position 1 and not have to touch it until I get to the GA/SC line and it will switch sites along the way automatically. Then I switch one click to knob position 2 and I’m on Palmetto and good all through SC. Knob position 3 for Viper in NC, etc etc.
Note that the Unication roams between sites a little different than a subscriber. A subscriber is constantly sampling RSSI. A Unication locks on to a site initially based upon RSSI but they holds that site until BER hits a certain threshold, then will switch sites based looking for RSSI threshold is met, hold until BER, etc. I find the Unication will usually hold a site a bit longer than my APX subscribers (where a better site may be available), but it still has a signal so it’s still chatting away.
And yes you can program it to hold on a site, but you have to get creative with the programming and program the site as it’s own system. I do that on NJICS where certain sites always carry certain talkgroups that I wish to monitor. Obviously I have to be in range of that site.
As far as being able to force traffic on to a site, not going to happen. The Unication does not affiliate so in simple terms the site has no idea it exists. Just like a scanner. Even with my valid subscriber, when I’m scanning multiple Talkgroups, unless a radio is affiliated (or carried on that site full time through system programming parameters), Im not hearing anything on that talkgroup if no radio is there. It’s a way of unnecessarily using system resources. Unless of course I change to that talkgroup and affiliate.