I'll have to look for the Sentinel manual programming (minus appending) video you mentioned. It would be a good learning tool for many
Programming 536HP for a site with no ID's
- Thread starter Freqed
- Start date
- Status
I'll have to look for the Sentinel manual programming (minus appending) video you mentioned. It would be a good learning tool for many
- Joined
- Jun 30, 2020
- Messages
- 2,008
But how do you scan a trunked system when you have not specified any TGs to receive? More data is needed (specifically, the TGs).
Any users interested in submitting data can make a FL and analyze the system (manually or using the tools in some scanners).
I think Paul made that call, but it makes sense. If nothing will ever be heard, why evaluate a control channel that will only slow scan speed? Again, interested parties can do the research and submit TG data.
You need two elements to scan a trunked system:
1. An active, receivable control channel of the type supported (P25/DMR/NXDN)
2. A TG to monitor.
If you don't have those, all you can do is add the system to a FL and use ID SEARCH (not SCAN).
Likewise, users who use the main dB will never hear a TG that is not listed in RR - even if it is active.
And if no carriers are transmitted, it is not possible to even add it as a FL to analyze it or determine the type (P25/DMR/NXDN/Etc)
This is where the local forums and/or a working relationship with the local database administrators is beneficial:
"I'm seeing a control/rest channel/Cap+ system..can anyone give it a listen? ". This is why the Illinois forum and database stays active.
- Joined
- Jun 30, 2020
- Messages
- 2,008
Agreed - higher quantity and quality data is always better: starting with "Hey - I'm hearing data on freq x. Does anyone know what it is?" "Oh, it's a P25 control channel" then "It is showing System ID 123 and NAC 456" followed by "other system frequencies are X, Y, and Z", then "I'm seeing TGs of 123 and 456 active and RIDs 12345 and 67890", then finally identifying the System, TGs, and RIDs and submitting that to RR.
Then the data is complete and added to the database, downloaded for Sentinel, and available to scan (with the RIDs being optional, of course, and not available for download AFAIK).
So I am at the facility and have run both discovery and LCN and am not getting anything, I did forget to bring my adjustable antenna and only have a 800 Mhz one. I was seeing the word CAP show up on the screen occasionally on the freq 452.4000 but nothing is happening it those modes and no voice traffic. I did a DMR freq search on it and came up with a different license that what I referenced in the OP, WRBQ978. It shows a couple different freqs than the first list so I reprogramed those in but i am still not getting a peep, I do see occasional full antenna strength on the meter but no audio and LCN is not working on the 4 freqs of the license. here are a few activity shots and the other license.
Attachments
My suggestion is to ignore the ULS data for now and run a custom band search over the entire UHF band (450-469). Particularly for UHF commercial systems, trying to identify frequencies based on ULS is often a waste of time. It's often more efficient to just run custom band search. I will say that in large metro areas custom band search can also be time consuming & a bit overwhelming because there is so much RF activity, sometimes you will pick up multiple unrelated systems on the same frequency (i.e. DMR and analog conventional). Also you can get tricked by intermod in high RF areas.
If the system is somewhat busy and you are in within range of the DMR site, you should be able to figure out what frequencies are being used. Then put those frequencies into a special system and monitor the system with the LCN finder.
If the system is somewhat busy and you are in within range of the DMR site, you should be able to figure out what frequencies are being used. Then put those frequencies into a special system and monitor the system with the LCN finder.
It appears you have good signal strength, so don't think that's an issue. Did you create your own MotoTRBO trunking system? Like nate says, the system has to be busy to catch LCN's. My little trick is program all the frequencies, and number the LCN 1-4 in random order and see if conversations are being followed. Also...if you don't have any talkgroups programmed, it must be run in ID Search Mode (defaults to ID Scan).
Here is how I had it set up in Sentinal:
I do see that 3 freqs were not in Color Code search mode and 1 was. I had the TG of 1 entered but I never heard a word and this place is out away from populated area so interference shouldn't be an issue. Last year I took my TRX 2 and was seeing more activity than this but didn't know the main speaker of the radio was dead as I always run a remote speaker in the house. If I go back anytime soon I will take both radios and see what happens. it also could be that the system isn't all that busy.
I do see that 3 freqs were not in Color Code search mode and 1 was. I had the TG of 1 entered but I never heard a word and this place is out away from populated area so interference shouldn't be an issue. Last year I took my TRX 2 and was seeing more activity than this but didn't know the main speaker of the radio was dead as I always run a remote speaker in the house. If I go back anytime soon I will take both radios and see what happens. it also could be that the system isn't all that busy.
Can you confirm the Color Code by performing a Custom Search in those bands?
LCN 0 might not be correct, as LCN 1 is the lowest in MotoTrbo systems, which is why it's probably not decoding the rest channel bursts these systems produce. Rest channels function like Control Channels in P25 systems. Maybe set it as LCN 4 to start.
If none of the above works, go into the scanner menu and perform an Analyze/LCN Finder. This might take awhile based on activity.
- Status
