Nucor Steel - Crawfordsville, IN (Montgomery County) - DMR Tier 3 System

[19-685]

Was in Crawfordsville, Indiana over the weekend and it appears the old UHF LTR system for Nucorp Steel has been replaced with an 800Mhz DMR Tier 3 system.

854.2375
854.0375
854.1375
854.2375d
854.2625
854.4375
854.5875
854.6625
854.9375
855.1375
855.3875
855.6875
855.9375
856.3125
856.3875
858.3625
859.3125

Color Code = 0

Talkgroups noted: 111, 113, and others - nothing nailed down other than "general operations" type traffic.

Unfortunately didn't have the laptop with DSD+ to decode additional info such as LCN's.

Hoping someone in the area might be able to pick up the ball and run with this in terms of gathering more info.

Best regards
19-685

 

[west-pac]

Here's the license for that system.

FCC Callsign WRFH736 (NUCOR STEEL CORPORATION)

FCC Callsign WRFH736 (NUCOR STEEL CORPORATION)

www.radioreference.com

 

[19-685]

Ran DSD+ on this system 09/02/2025 with no luck decoding anything other than Color Code information - no LCN/Channel #'s decoded.

Control Channel of 854.2375 Mhz comes up "DT3" while searching the 800Mhz band with a BCD325P2

Did log several talkgroups with the TRX-1 running in parallel.

Update has been submitted to the database for entry creation - perhaps someone can run ANALYZE mode once the system is available for download in Sentinel.

Enjoy

19-685

 

[mtindor]

Ran DSD+ on this system 09/02/2025 with no luck decoding anything other than Color Code information - no LCN/Channel #'s decoded.

Control Channel of 854.2375 Mhz comes up "DT3" while searching the 800Mhz band with a BCD325P2

Did log several talkgroups with the TRX-1 running in parallel.

Update has been submitted to the database for entry creation - perhaps someone can run ANALYZE mode once the system is available for download in Sentinel.

Enjoy

19-685

If you are running DSDPlus and were parked on the control channel, at the same time you were hearing voice calls on the TRX-1 you should have seen "group call" information show up in the Activity window and should have seen LSNs (not LCNs) populate in the Channel Activity Window.

When monitoring the control channel with DSDPlus, any time there is a voice (group) or private call, the Channel Activity window is going to indicate what LSN is in use. Sure, you may not be able to directly tie that to a frequency unless you were listening to that voice transmission at the time on the TRX-1 and could correlate the two. But the LSNs themselves help. I'm sure that there is LSN information in Event Log (DSDplus.event) or 1R-log.txt that would at least give a clue as to what LSNs are being used. And if one knows a handful of those, one can determine if a standard bandplan is being used. And if a standard bandplan is being used, then one can calculate the LCNs for every frequency in use.

 

[19-685]

Still learning DSDPlus....

Thank you for the insight and education mtindor!!!

Will review those log files ASAP.

 

[mtindor]

Still learning DSDPlus....

Thank you for the insight and education mtindor!!!

Will review those log files ASAP.

You're welcome. If you do have those logs, keep in mind they grow pretty fast -- especially 1R-log.txt. I rarely look in 1R-log.txt, and when I really need something out if it the file is like 16-32 GB in size and useless to me. I end up having to delete. But if you start DSDPlus with the defaults of FMP*-CC.BAT and 1R.BAT it will generate a 1R-log.txt file. That can be disabled by modifying the bat file. The 1R-DSDplus.Event log is always created. Both logs can become very large over time, and so it's not easy to just open them in Notepad.

An example from DSDPlus.event (or 1R-DSDPlus.Event if you run FMP*-CC.bat and 1R.bat) is this:

2025/09/03  08:31:49  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:31:51  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:31:52  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:31:52  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  RID=309 [BUS 90]  Ch=2998  3s
2025/09/03  08:31:56  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:31:58  Freq=460.900000  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:36:21  Freq=460.900000  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  RID=300 [BUS 83]  Ch=2998  3s
2025/09/03  08:36:25  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:36:27  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:42:00  Freq=460.900000  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  RID=309 [BUS 90]  Ch=2998  4s
2025/09/03  08:42:06  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:42:08  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:42:08  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  RID=337 [BUS 95]  Ch=2998  3s
2025/09/03  08:42:13  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:42:13  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  RID=309 [BUS 90]  Ch=2998
2025/09/03  08:42:15  Freq=460.900000  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:42:15  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  RID=309 [BUS 90]  Ch=2998  2s
2025/09/03  08:42:19  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:42:20  Freq=463.737500  DCC=0  RAS  Group call; TG=3000 [Brooke Co School Buses]  Ch=2998
2025/09/03  08:43:08  Freq=460.900000  DCC=0  RAS  Group call; TG=4000 [Hancock Co School Buses]  RID=4048 [BUS 181]  Ch=2998  2s

Above is a local system of mine. Where you see Ch=2997 or Ch=2998 those are LSNs. There are two LSNs (logical slot number) per frequency, and one LCN (logical channel number) per frequency. Ignore the frequencies above because I know the freq <--> LCN pairings for this particular site. You don't with yours. So you would only likely see the frequency of the current control channel you are monitoring.

What is important is to look in the DSDPlus.event file (or 1R-DSDPlus.event file) for the lines containing "Ch=". And then gather every unique Ch= number. if you find that information and post it, others [like me] can help you determine potentially what LCNs are associated with what frequencies, since we know the licensed frequencies.

Uniden scanners want LCNs (which have to be determined by converting the LSNs).

DSDPlus wants LSNs in its files

The RadioReference DB will take either one (but when you submit you need to specify if you are submitting LSNs or LCNs). And then once added, you can navigate to a specific T3 site and see the LSNs and associated LCNs, so you can program whatever you want to program.

At any rate, if you can, see if you can dig all of the Ch= numbers out of the *.DSDPlus.event log for that particular site, and if you can post them. If the files are too big to work with, shut down DSDPlus, back up the event log and delete it, and restart DSDPlus again and then the only thing you'll have in the event log is information about the site you are currently monitoring.

Mike