You probaby nailed it. Even though the LTR system only lists three frequencies, the license lists five frequencies. If it is them, it looks like they have simplified things by just using ch. 1-5 instead random stuff. And 452.200 (the cc) is ch.1, so maybe they go up in order 1-5 from lowest to highest freq.
Might want to add something like this to the various DSDPlus files:
DSDPlus.networks
NEXEDGE48,428,"Possibly Meritus Medical Center"
DSDPlus.sites
NEXEDGE48,428,1,"MMC"
DSDPlus.frequencies
NEXEDGE48,428,1,1,452.20000,457.20000,1
NEXEDGE48,428,1,2,453.00000,458.00000,2
NEXEDGE48,428,1,3,461.90000,466.90000,3
NEXEDGE48,428,1,4,463.47500,468.47500,4
NEXEDGE48,428,1,5,464.06250,469.06250,5
Then monitor the system. When you see the traffic switch to a particular frequency, if you have a scanner available you might want to tune to that frequency. Heck, if you have a scanner available you might want to add all of the frequencies in there (except perhaps the active control channel).
Then, even if you don't have a scanner that handles NXDN, at least you'll be able to scan the five frequencies and when it stops on a freq and you hear digital noise, look at the DSDPlus screen and see which ch # is showing as active.
That's one way to tell if you've got the right order.
If you don't have a scanner that'll do NXDN, you can set DSDPlus up to scan the five frequencies in a frequency list (I've never done it) and it would stop on any active channel and play the audio.
At any rate, you've given plenty of information so that anyone else in the area might be able to confirm whether or not its MMC and what the ch # to freq pairings are.
Mike
