DSDPlus Bug in P25 Band Plan Management

devicelab · Mar 29, 2020

We have a system here that uses VHF and 700 sites but have since switched to (2) different band plans -- but since they're neighbors, it looks like DSD is getting confused.

Here's an example event log output:

2020/03/29 12:20:10 Current site: BEE00.9CC-2.1
2020/03/29 12:20:12 Patch Supergroup: TG=59208
2020/03/29 12:20:12 Patch Subgroup: TG=59209
2020/03/29 12:20:24 Group call; TG=59210 Src=EXTERNAL Ch=769.46875-2 3s
2020/03/29 12:20:28 Group call; TG=59210 RID=7503927 Ch=769.46875-2
2020/03/29 12:20:28 BEE00.9CC-2.1 neighbor: Site BEE00.9CC-2.4; CC=1-1766 773.04375
2020/03/29 12:20:29 BEE00.9CC-2.1 neighbor: Site BEE0A.715-1.9; CC=0-2633 867.46250 IWN Marysville
2020/03/29 12:20:30 BEE00.9CC-2.1 neighbor: Site BEE0A.715-1.17; CC=0-2815 868.60000 IWN Lynnwood
2020/03/29 12:20:30 BEE00.9CC-2.1 neighbor: Site BEE0A.715-1.52; CC=0-2607 867.30000 IWN Rattlesnake Mtn
2020/03/29 12:20:32 BEE00.9CC-2.1 neighbor: Site BEE00.9CC-2.5; CC=1-1772 773.08125
2020/03/29 12:20:33 BEE00.9CC-2.1 neighbor: Site BEE00.9CC-2.2; CC=1-1768 773.05625
2020/03/29 12:20:43 BEE00.9CC-2.1 neighbor: Site BEE00.9CC-2.3; CC=1-1928 774.05625
2020/03/29 12:20:44 BEE00.9CC-2.1 neighbor: Site BEE0A.715-1.6; CC=0-2503 866.65000 IWN Columbia Center
2020/03/29 12:21:08 BEE00.9CC-2.1 neighbor: Site BEE0A.715-1.64; CC=0-2849 868.81250 IWN ValleyCom
2020/03/29 12:21:30 BEE00.9CC-2.1 neighbor: Site BEE0A.715-1.8; CC=0-2529 866.81250 IWN Grass Mtn

The italicized lines are VHF sites.

Network: BEE00.9CC ; WSP

Bandplan #0: Base=851.00625 Offset=-45 Spacing=6.25 BW=12.5
Bandplan #1: Base=762.00625 Offset=+30 Spacing=6.25 BW=12.5
Bandplan #2: Base=136. Offset=-6.5875 Spacing=12.5 BW=12.5
Bandplan #3: Base=136. Offset=-5.9375 Spacing=12.5 BW=12.5
Bandplan #4: Base=136. Offset=-4.3375 Spacing=12.5 BW=12.5
Bandplan #5: Base=136. Offset=-4.15 Spacing=12.5 BW=12.5
Bandplan #6: Base=136. Offset=-4.025 Spacing=12.5 BW=12.5
Bandplan #7: Base=136. Offset=-3.8125 Spacing=12.5 BW=12.5
Bandplan #8: Base=136. Offset=-3.7375 Spacing=12.5 BW=12.5
Bandplan #9: Base=136. Offset=-3.6375 Spacing=12.5 BW=12.5
Bandplan #10: Base=136. Offset=-3.5875 Spacing=12.5 BW=12.5
Bandplan #11: Base=136. Offset=-5 Spacing=2.5 BW=12.5
Bandplan #12: Base=142.24 Offset=-5 Spacing=2.5 BW=12.5
Bandplan #13: Base=152.48 Offset=-5 Spacing=2.5 BW=12.5
Bandplan #14: Base=162.72 Offset=-5 Spacing=2.5 BW=12.5
Bandplan #15: Base=762.00625 Offset=+30 Spacing=12.5 BW=12.5 Slots=2

Network: BEE0A.715 ; IWN

Bandplan #0: Base=136. Offset=-6.5875 Spacing=12.5 BW=12.5
Bandplan #1: Base=136. Offset=-5.9375 Spacing=12.5 BW=12.5
Bandplan #2: Base=136. Offset=-6.5875 Spacing=12.5 BW=12.5
Bandplan #3: Base=136. Offset=-5.9375 Spacing=12.5 BW=12.5
Bandplan #4: Base=136. Offset=-4.3375 Spacing=12.5 BW=12.5
Bandplan #5: Base=162. Offset=-5 Spacing=2.5 BW=12.5
Bandplan #6: Base=136. Offset=-4.025 Spacing=12.5 BW=12.5
Bandplan #7: Base=136. Offset=-3.8125 Spacing=12.5 BW=12.5
Bandplan #8: Base=136. Offset=-3.7375 Spacing=12.5 BW=12.5
Bandplan #9: Base=136. Offset=-3.6375 Spacing=12.5 BW=12.5
Bandplan #10: Base=136. Offset=-3.5875 Spacing=12.5 BW=12.5
Bandplan #11: Base=136. Offset=-5 Spacing=2.5 BW=12.5
Bandplan #12: Base=142.24 Offset=-5 Spacing=2.5 BW=12.5
Bandplan #13: Base=152.48 Offset=-5 Spacing=2.5 BW=12.5
Bandplan #14: Base=162.72 Offset=-5 Spacing=2.5 BW=12.5
Bandplan #15: Base=146. Offset=+4.05 Spacing=5 BW=12.5

devicelab · Mar 30, 2020

FWIW, this may be a bad band plan on the control channel. Motorola is investigating.

slicerwizard · Mar 30, 2020

You should be able to look at all of the transmitted bandplan data from the control channel in the DSD+ console window or redirect it to a text file. Would be fairly simple to figure out if anything is off. Involving Motorola in what could just be a DSD+ bug? Ballsy. Maybe give the FL folks a raw CC sample and see what they say...

devicelab · Mar 31, 2020

slicerwizard said:
Involving Motorola in what could just be a DSD+ bug?

Negative -- this is from a federal/state LMR upgrade project and it's already in the hands of Motorola per their latest status update. Our state police has been told to use their conventional P25 frequencies and to avoid using the trunk system due to these "roaming issues." Since I'm not involved in the project, I don't know if this issue is related but it seems logical. My guess is that Motorola tried to do something 'not supported' as a workaround and that is screwing with scanners/radios and also DSD.

devicelab · Mar 31, 2020

FWIW, here's a 5 min raw recording plus the -v3 output from the control channel window.

https://www.dropbox.com/s/ochqcyx0ozlymvy/SYSTEM9CC-CONTROL-RAW.zip?raw=1

slicerwizard · Mar 31, 2020

Ouch. That's a PSK signal that wasn't processed with the proper TCP linking to FMPx or the bandwidth wasn't set right.

Looks like the control channel is correctly broadcasting the required bandplan data.

Bandplan BEE00.9CC-0: Base=851.00625 Offset=-45 Spacing=6.25 BW=12.5
Bandplan BEE00.9CC-1: Base=762.00625 Offset=+30 Spacing=6.25 BW=12.5
Bandplan BEE00.9CC-2: Base=136.00000 Offset=-6.5875 Spacing=12.5 BW=12.5
Bandplan BEE00.9CC-3: Base=136.00000 Offset=-5.9375 Spacing=12.5 BW=12.5
Bandplan BEE00.9CC-4: Base=136.00000 Offset=-4.3375 Spacing=12.5 BW=12.5
Bandplan BEE00.9CC-5: Base=136.00000 Offset=-4.15 Spacing=12.5 BW=12.5
Bandplan BEE00.9CC-6: Base=136.00000 Offset=-4.025 Spacing=12.5 BW=12.5
Bandplan BEE00.9CC-7: Base=136.00000 Offset=-3.8125 Spacing=12.5 BW=12.5
Bandplan BEE00.9CC-8: Base=136.00000 Offset=-3.7375 Spacing=12.5 BW=12.5
Bandplan BEE00.9CC-9: Base=136.00000 Offset=-3.6375 Spacing=12.5 BW=12.5
Bandplan BEE00.9CC-10: Base=136.00000 Offset=-3.5875 Spacing=12.5 BW=12.5
Bandplan BEE00.9CC-11: Base=136.00000 Offset=-5 Spacing=2.5 BW=12.5
Bandplan BEE00.9CC-12: Base=142.24000 Offset=-5 Spacing=2.5 BW=12.5
Bandplan BEE00.9CC-13: Base=152.48000 Offset=-5 Spacing=2.5 BW=12.5
Bandplan BEE00.9CC-14: Base=162.72000 Offset=-5 Spacing=2.5 BW=12.5
Bandplan BEE00.9CC-15: Base=762.00625 Offset=+30 Spacing=12.5 BW=12.5 Slots=2
Bandplan BEE0A.715-0: Base=136.00000 Offset=-6.5875 Spacing=12.5 BW=12.5 Slots=2
Bandplan BEE0A.715-1: Base=136.00000 Offset=-5.9375 Spacing=12.5 BW=12.5 Slots=2
Bandplan BEE0A.715-2: Base=136.00000 Offset=-4.3375 Spacing=12.5 BW=12.5 Slots=2
Bandplan BEE0A.715-3: Base=136.00000 Offset=-4.15 Spacing=12.5 BW=12.5 Slots=2
Bandplan BEE0A.715-4: Base=136.00000 Offset=-4.025 Spacing=12.5 BW=12.5 Slots=2
Bandplan BEE0A.715-5: Base=136.00000 Offset=-3.8125 Spacing=12.5 BW=12.5 Slots=2
Bandplan BEE0A.715-6: Base=136.00000 Offset=-3.7375 Spacing=12.5 BW=12.5 Slots=2
Bandplan BEE0A.715-7: Base=136.00000 Offset=-3.6375 Spacing=12.5 BW=12.5 Slots=2
Bandplan BEE0A.715-8: Base=136.00000 Offset=-3.5875 Spacing=12.5 BW=12.5 Slots=2
Bandplan BEE0A.715-9: Base=136.00000 Offset=-5 Spacing=2.5 BW=12.5 Slots=2
Bandplan BEE0A.715-10: Base=142.24000 Offset=-5 Spacing=2.5 BW=12.5 Slots=2
Bandplan BEE0A.715-11: Base=152.48000 Offset=-5 Spacing=2.5 BW=12.5 Slots=2
Bandplan BEE0A.715-12: Base=162.72000 Offset=-5 Spacing=2.5 BW=12.5 Slots=2
Bandplan BEE0A.715-13: Base=146.00000 Offset=+0.765 Spacing=5 BW=12.5 Slots=2
Bandplan BEE0A.715-14: Base=146.00000 Offset=+4.2 Spacing=5 BW=12.5 Slots=2
Bandplan BEE0A.715-15: Base=146.00000 Offset=+4.05 Spacing=5 BW=12.5 Slots=2

devicelab · Mar 31, 2020

Try this audio: https://www.dropbox.com/s/rdkmiqiza9aw5vn/SYSTEM9CC-CONTROL-RAW-FMPA.zip?raw=1

This is from FMPA. The previous was with SDR# thru VAC to DSD+ ...using a 12000hz bandwidth.

devicelab · Apr 16, 2020

Just FYI, it looks like this was fixed in the latest update. Yay!

DSDPlus Bug in P25 Band Plan Management

devicelab

Whacker Extraordinaire

devicelab

Whacker Extraordinaire

slicerwizard

Member

devicelab

Whacker Extraordinaire

devicelab

Whacker Extraordinaire

slicerwizard

Member

devicelab

Whacker Extraordinaire

devicelab

Whacker Extraordinaire

Similar threads