I'm a newbie coming from an old Pro 39 from a long time ago. I just decided to get back into the hobby and I bought a Uniden BCD436HP. I installed Sentinel and made some favorites for Lake County Indiana. I'm having trouble understanding all of the new systems compared to the old days and it seems like I'm missing out on police calls and replies to them. I know Lake County is P25 and I programed it from the software. I see in the database that the Control Number is 774.71875c. My question is in Sentinel where am I Supposed to see this number and the Alternate Numbers listed in the DB? Also is this something I should even be concerned with?
I presume you are referring to the control channel frequencies.
On a trunked system, those frequencies are in a Site attached to the system. For a trunked system, you have the system's name, which you can see in Sentinel.
Expand the system by clicking on the '+' (plus sign) just to the left of the system name. Under the system you would see any Departments (which are the talkgroup ID's (TGID's) programmed. Also, you will see any sites programmed. Click on the site name to select it, and you'll see the frequencies in the right hand pane of Sentinel's window.
For a trunked system to work, you need both the TGIDs, loaded in one or more Departments, and at least one site with the frequencies for that site. You can have only the control channels in the site (primary & alternates), or simply have all of the frequencies for the site. For Harris P25 systems,
any site frequency can be used as a control channel. Some rotate that regularly, some do not. That depends on how the system was set up. For Motorola based system, you have a primary control channel, as well as one or more alternates.
You can program your systems by appending systems from the main database, entering manually, or having Sentinel create a Favorites list for you using your location, range, and service types.