For those using the
DMR_TIII_LxN_Freq_calc software to determine/calculate repeater frequencies based on the LSN/CH ID popping up in DSD+ (or the LCN that a Uniden scanner will display after running LCN Finder), this post should be helpful. The info in this post supersedes previous posts in this thread discussing the various band plans and how to calculate them.
Don't get hung up on the fact that the Ref. frequency (aka base frequency) shown here for each plan deviates from what the calculator will show as the base frequency. As long as you start with a known good example, the results will be correct. It's also less confusing to start with 454.00625 for the Part 22 channels instead of 439.00625.
Make sure you're clear about whether you're dealing with LCN (Uniden) vs LSN/CH ID (DSD+), otherwise the calculations will be way off. The calculator defaults to LSN/CH ID.
Standard UHF Plan
Ref. frequency 450.0, Ref. LSN 3 for the following:
- LCN range 1-1200
- LSN (CH ID) range 3-2401
- Frequency range 450.000-464.9875 (EXCLUDING 454.00625-454.65625 with 5 digits after the decimal point)
Part 22 UHF Plan
Ref. frequency 454.00625, Ref. LSN 2403 for the following:
- LCN range 1201-1253
- LSN (CH ID) range of 2403-2507
- Frequency range 454.00625-454.65625 (ONLY when there are 5 digits after the decimal point in this range, otherwise use the Standard UHF Range)
T-Band Plan
Ref. frequency 470.0, Ref. LSN 2509 for the following:
- LCN range 1254-4093
- LSN (CH ID) range 2509-8188
- Frequency range 470.000-505.4875
So in summary, when using DSD+....
- LSN/CH ID 3-2401 is the Standard UHF plan
- LSN/CH ID 2403-2507 is the Part 22 UHF plan
- LSN/CH ID 2509-8188 is the T-Band plan