Please excuse me if I am posting this in the wrong section. If I am please guide me to the right area. I currently work for a School Bus Contractor in Charles County, Maryland. We purchased a Uniden SDS100 with DMR enabled so that she can monitor her buses while she is on the move without having to purchase a DMR radio. We used the zip code programming and enabled School tag so that we were able to get the school bus frequencies. We keyed up her base radio and nothing comes across the scanner. I posted in the Maryland forum asking if the system was encrypted and was told it is not. I was told that there is 2 other frequencies listed that are for the system but arent in the RR table for this system. 151.0625 and 152.4425. Someone else commented (If you add those frequencies, you'll also need to run the LCN finder (successfully). Otherwise, the Uniden will just ignore them anyway.) I am at this point completely lost and hoping that someone can help us.
Thanks for your time.
Terrance
Your best bet is to add the additional frequencies to the system, and then run the LCN Finder.
Press the Menu button on the left side of the scanner.
Scroll down to Analyze & press
E(enter/yes) to select it.
Scroll to LCN finder & press
E again to select
The scanner will ask for the name of the system. Enter that by using the scroll knob for letters. Use the arrows by the 'soft keys' (directly under the display) to move the cursor left or right
Press
E once you have entered the first few letters of the system name
If you have more than one system that contain the same letters as you've entered, scroll to the correct one and press
E to select.
Next, scroll to and select the correct site for the system if there is more than one. If only one, make sure it is selected & press
E again.
Now, the scanner will monitor the system to determine the LCN's in use. They may not be 1-2-3-4, but can be any of various combinations such as 1-2-5-8.
If you have four frequencies entered, at first you'll see "Found LCN 0/4" with the system name underneath.
As it identifies LCN's, that will update to 1/84, 2/4, etc. If it finds all four, you'll see a note that all have been found, & have an option to save the findings. Once you've found all the channels, either read the scanner into Sentinel, to collect the information, or, using the menus, "edit" the system & site on the scanner, to find which frequencies are on what LCN.
Note that finding the LCN's can be time consuming. The system needs to have at least moderate activity for this to work, but not so much that it's too heavily loaded to get an accurate LCN finding. As this is a school system, there would likely not be enough traffic to determine the LCN's on days and times the schools are not in session, such as overnight. Since this is a bus system, your best bet is to start maybe an hour or so before the first classes let out, as drivers get in their buses & head for their assigned pickup points.
If this is your system,
https://www.radioreference.com/apps/db/?sid=7852 , there are four frequencies listed on their
license.
