Submit trunked system LCN with no frequency?

[nd5y]

Some types of trunked systems use LCNs that appear to be random and don't follow a band plan.
There is a NXDN system near me like this.
Control channel decoding software will display the all the LCNs used but not the frequencies because as far as I know there is no formula to calculate them.

For trunked systems that use LCNs the database has a CH ID and Frequency column for each site.
If the database doesn't have complete information for a trunked site is it acceptable or useful to sumit LCNs if the frequencies are not known?

 

[Whiskey3JMC]

Can you post an example from the RRDB? Do(es) the system(s) not track correctly with the listed LCNs? The Uniden x36HPs and SDSx00s have an LCN finder which can help fill in the blanks. I know there's also a DMR TIII LCN calculator floating around here on the forums, thought I saw one for NXDN too but I could be mistaken

 

[GTR8000]

If the database doesn't have complete information for a trunked site is it acceptable or useful to sumit LCNs if the frequencies are not known?

No, incomplete info like that belongs in the wiki, not the database.

It really shouldn't be too difficult to figure out what frequency each LCN/LSN/CH ID belongs to. Find all FCC licenses associated with the site, then monitor each frequency while watching whatever software you're using, and match up the activity. Frankly, this could even be done using any analog receiver/scanner during periods of low activity where only one frequency is active at a time. And of course once the frequencies are determined and plugged into the decoding software, final verification would result from correctly tracking conversations.

 

[nd5y]

Can you post an example from the RRDB? Do(es) the system(s) not track correctly with the listed LCNs?

Self Radio Nexedge Site: Midlothian

Self Radio Nexedge Site: Midlothian Details

www.radioreference.com

This site has 8 channels. I haven't been able to figure out the other 7 LCNs positively.
I don't have a NXDN/DMR trunk tracking scanner that will find LCNs, Just the old public version of DSD+.

Also some of the sites have the same LCN number but different frequencies at different sites. I don't think you can calculate that.

 

[nd5y]

No, incomplete info like that belongs in the wiki, not the database.

Ok. Thats all I need to know.

It really shouldn't be too difficult to figure out what frequency each LCN/LSN/CH ID belongs to. Find all FCC licenses associated with the site, then monitor each frequency while watching whatever software you're using, and match up the activity.

That's what I do.

It's hard when you are over 100 miles away and you can only receive during band openings that bring in other stuff, the system has more frequencies and licenses than are actually used, there are multiple licensees on all the frequencies, emission designators don't match the frequencies, frequencies appear to be used at other sites than what is licensed, etc.

 

[mwjones]

Self Radio Nexedge Site: Midlothian

Self Radio Nexedge Site: Midlothian Details

www.radioreference.com

This site has 8 channels. I haven't been able to figure out the other 7 LCNs positively.
I don't have a NXDN/DMR trunk tracking scanner that will find LCNs, Just the old public version of DSD+.

Self Radio is a hot mess... They seem to change LCN's on a whim about once a year, and don't use dynamic addressing like Baylor does.

Guess I should do a road trip (75 miles away) and bring the Mobile Rig with me, as long as there is enough activity, I should be able to help you decode it (I've done a number of other Self Radio sites).

 

[nd5y]

Self Radio is a hot mess...

I was going to say someting worse.