Understanding DMR Logs & Messages

[tweiss3]

I have been following this DMR system I found and logging with SDRTrunk. I don't understand a bunch of these messages in the log. Could someone help me in determining what each one means? I believe it is a Moto Cap+ single repeater, and I know many of the HT's they are using are Motorola based on their discussions. The CC being used is 12.

20210615 093043,FAILED,[CRC ERROR] SLC TIER III CONTROL CHANNEL LARGE NET:0 SITE:32 SLOT COUNTER:0 MSG:280800000

20210615 093043,FAILED,[CRC ERROR] SLC UNKNOWN OPCODE:4 MSG:49108

20210615 092418,FAILED,[CRC-ERROR] CC:8 CSBK *UNKNOWN* VENDOR:114 UNKNOWN OPCODE:10 MSG:0A72DEA3FEAD12B1523C3980

20210615 091958,FAILED,[CRC ERROR] SLC HYTERA XPT ALL REPEATERS BUSY MSG:800000000

20210615 091648,PASSED,CC:10 MULTI-BLOCK CSBK CONTINUATION FINAL BLOCK:NO MSG:6A02D823FE2D0291562D3A80

20210615 091228,PASSED,CC:6 MULTI-BLOCK CSBK HEADER VENDOR:UNKNOWN (213) UNKNOWN CSBKO:57 MSG:B9D581CFA9131C21E0FBCC67

20210615 090812,FAILED,[CRC ERROR] SLC MOTOROLA CON+ CONTROL CHANNEL NETWORK:0 SITE:128

20210615 090350,PASSED,RATE 3/4 DATA CONFIRMED:CA409E0886BCB49EEC6D47FAB329BCA9 UNCONFIRMED:EA29CA409E0886BCB49EEC6D47FAB329BCA9

20210614 191237,PASSED,CC:12 FM:UID# TO:16448250 IP FROM:12.48.139.75 TO:13.250.250.250 UDP PORT FROM:4005 TO:4005 ARS DEVICE REGISTRATION-INITIAL DEVICE:UID#
20210614 191237,PASSED,CC:12 CSBK PREAMBLE FM:UID# TO:16448250 DATA BLOCKS TO FOLLOW:17 MSG:BD008011FAFAFA308B4B8B9D

20210614 191237,PASSED,SLC ACTIVITY UPDATE TS1 [95] INDIV DATA / TS2 [00] IDLE MSG:1A09500FE

"2021:06:14:19:12:37","","DMR","DATA_PACKET","UDI#"," (16448250)","","462.675000","TS:2,"CC:12 FM:UID# TO:16448250 IP FROM:12.48.139.75 TO:13.250.250.250 UDP PORT FROM:4005 TO:4005 ARS DEVICE REGISTRATION-INITIAL DEVICE:UID#"
"2021:06:14:19:03:12","","DMR","DATA_PACKET","UID#"," (16448250)","","462.675000","TS:1,"CC:12 FM:UID# TO:16448250 PACKET:733A04A16D1739BE139A08026A79B15B7AAA7E3886BC6219A86D47F425B3A1A3CE90333886BCB04DA87D5AFA9260E401"

I'd love to understand what is going on behind the cloak.

 

[sonm10]

Honestly, I don't understand most of that, but how do you know it's Cap+? I see Tier III and Con+ in the code. Is it decoding properly? I see 3/4 data rate also.

Try to get a better signal. Reposition your antenna or use a better one.

OOPS, I MISREAD. I THOUGHT YOU WERE USING DSD+. Does SdrTrunk have a gain control?

 

[tweiss3]

Honestly, I don't understand most of that, but how do you know it's Cap+? I see Tier III and Con+ in the code. Is it decoding properly? I see 3/4 data rate also.

Try to get a better signal. Reposition your antenna or use a better one.

OOPS, I MISREAD. I THOUGHT YOU WERE USING DSD+. Does SdrTrunk have a gain control?

I don't think I have a receive issue, my PPM is very low and the audio is extremely clear.

I don't know its a Cap+, but my understanding is Cap+ and Con+ are only different by the number of sites and repeaters/site. The Cap+ assumption was based on the data burst every 60-90 seconds. I'm not so concerned between the two.

As for the code, there are failed Tier III calls, a Hytera calls and a Con+ calls, all with different site #s. I'm wondering if this is remnants from the initial install and the new user just bought it off ebay and tossed it up without understanding the setup.

I'm trying to understand what is going on better. Maybe even figure out what the MSG at the end of these mean, or the way to decode them.

 

[AM909]

In general (not specific to SDRTrunk), when you have something like a CRC or ECC failure, it means that message was garbled and could not be corrected – you really shouldn't waste any time trying to understand the rest of that message. You'll see unknown opcodes, supposed Hytera messages on a P25 system, etc. None of it means anything.

 

[slicerwizard]

I don't know its a Cap+, but my understanding is Cap+ and Con+ are only different by the number of sites and repeaters/site. The Cap+ assumption was based on the data burst every 60-90 seconds. I'm not so concerned between the two.

Since one doesn't have control channels and the other does, it shouldn't be that hard to figure out.

As for the code, there are failed Tier III calls, a Hytera calls and a Con+ calls, all with different site #s. I'm wondering if this is remnants from the initial install and the new user just bought it off ebay and tossed it up without understanding the setup.

What??? Sounds like nothing more than bad decodes to me.

I'm trying to understand what is going on better. Maybe even figure out what the MSG at the end of these mean, or the way to decode them.

I would see what DSD+ 1.101 reports.

 

[thewraith2008]

I'd love to understand what is going on behind the cloak.

The messages been reported by SDRTrunk are fairly straight forward.
What you are going to need is a common frame of reference to understand them.
You will get this understanding by looking though the DMR standards (see TS 102-361-01, TS 102-361-02, TS 102-361-03, TS 102-361-04)

Half the messages in post are showing "FAILED,[CRC ERROR]".
It's probably safe to assume that what follows on the line is not valid.

Some of the other messages are just bad decodes and the rest look like they are related to DATA packet PDUs.

 

[tweiss3]

Since one doesn't have control channels and the other does, it shouldn't be that hard to figure out.


What??? Sounds like nothing more than bad decodes to me.


I would see what DSD+ 1.101 reports.

Hence the assumption Cap+, its an unlicensed repeater, and as far as I can tell, its only a single repeater on a single frequency pair.

I'll have to see if I can get DSD+ to work and log it. I can't remember anything on how to set it up, and just confused myself this morning.

The messages been reported by SDRTrunk are fairly straight forward.
What you are going to need is a common frame of reference to understand them.
You will get this understanding by looking though the DMR standards (see TS 102-361-01, TS 102-361-02, TS 102-361-03, TS 102-361-04)

Half the messages in post are showing "FAILED,[CRC ERROR]".
It's probably safe to assume that what follows on the line is not valid.

Some of the other messages are just bad decodes and the rest look like they are related to DATA packet PDUs.

I did switch antennas to one in the attic that is a quarter wave on a ground plane that is a backup for my 70cm base station. I'm still seeing the same messages in the log. I won't read into it too much more.

 

[slicerwizard]

I'll have to see if I can get DSD+ to work and log it. I can't remember anything on how to set it up, and just confused myself this morning.

You download it and its DLL package, unzip all files into a new folder, then run the FMP24-CC.bat and CC.bat files. The Windows Firewall might pop up and ask if FMP24 can act as a server; if so, allow it. Manually tune FMP24 to the signal of interest by clicking on the spectrum window title and then typing in the frequency (in MHz) and pressing Enter.