There are 7 frequencies to program for the system ... not 5 or 10. They might be in the system controller as LCN 1 through 7, although some systems have the frequencies spaced apart ... there are 20 potential LCN slots.
460.1625 460.2875 460.3875 460.4625 453.4375 453.4875 460.3625
The short burst of data at specific intervals is simply a status message to all radios who have that frequency assigned as their home channel. More than one talkgroup may share the same frequency. Several frequencies may serve as the home channel for their specific talkgroups.
Depending on the number of users on the system at any time, communications on a talkgroup will generally occur on the talkgroups's home channel, unless that frequency is in use. If the frequency is in use, the controller will assign the communications - and tell the radios on that talkgroup - to switch to a specific frequency not already in use.
So, on a system with low load, the frequencies might sound like conventional communications because the same talkgroups use the same frequencies most of the time ... police always use frequency A, fire always uses frequency B, etc. Only the telltale data burst gives it away that the communications are LTR.
Greg --- With the 2055, which is based on the Pro 97, you should have the ability to decode the LCN easily, since the Pro 97 had such a feature. See:
http://wiki.radioreference.com/index.php/Pro-97#Finding_LTR_LCN_order
For those who have a scanner that can do LTR, and does not use the Uniden Dynamic Memory structure, here's a workaround:
1 - Program a bank as LTR, and fill each of the memory slots 01 to 20 with just one frequency from the system ... in other words, all slots will have the same frequency.
2 - Keep track of which memory slot the scanner is stopping on when communications are heard. This should indicate what the LCN of that frequency in the system is. For instance, if the communications is mostly stopping on memory slot 07, 07 is likely the LCN of the frequency.
3 - If your scanner is capable, you can program multiple banks as described above ... each with a different system frequency ... to speed the process up.
Curfew --- The reason why you weren't receiving the same signal strength for all 7 frequencies was because 2 or the frequencies are at separate sites from the main site ... which is located near Cameron / Calhoun County.
One footnote to this system ... it is licensed for both analog and digital voice communications.