Hi All,
I've spent the last 8+ hours struggling to get OP25 up and running. I finally worked out the issues that were preventing my USB SDR stick from working. I've got OP25 to the point where I can see signals on the scope, but I still can't seem to get any decode of voice or control channel data.
I haven't been able to find the NAC for the system I'm trying to monitor, and I was figuring that may be my problem when it comes to voice decode. I setup my system in the trunk.tsv file, and tried to make use of NAC 0xF7E. My understanding is that F7E is somewhat of a wildcard NAC that will unmute all receivers, though I'm guessing OP25 isn't designed to do so. When calling the trunk.tsv file, I don't see any talkgroups pop up in the space above the frequency on the first tab. I'm thinking with the wrong NAC, any traffic is being ignored, hence not seeing talkgroups here. It's a VERY busy system, so if things were working, I'd expect to see something here in under a minute. From reading online (I think it was another post here, but can't remember at this point) I believe that simply opening and parking OP25 on the control channel without calling trunk.tsv should result in system information, including the NAC appearing in the Traffic tab. This tab remains blank in my case, unless I call trunk.tsv, in which case it populates the info from the file, and anything else remains as zeros. I have verified with my scanner and Unitrunker that I am on the correct control channel frequency, and that what I pulled from memory hadn't changed.
So, at this point, I feel I'm doing something wrong, I'm just not sure what. Every other problem I've managed to sort out with enough head-banging, but I've been stuck here now for a few hours.
My Unitrunker question is this...I understand Unitrunker used to come with kNACk, to decode NACs. I've seen it in my Unitrunker folder in the past. Upon reinstalling Unitrunker today for this project, I no longer see kNACk. I attempted the next version back, with the same result. I may have an older version which had it hiding on the network somewhere, but I'm not sure. Is kNACk no longer offered/supported? I thought maybe the feature was rolled into Unitrunker, but I can't seem to find it in any of the screens.
The signals are strong on the scope, as expected. I'm using an 800 rubber duck on about 3" worth of feedline, and can normally tell the control channel is there without an antenna connected. I pulled my SDR ppm correction value out of SDR#, so I'm sure that's correct.
For reference, the two lines I'm starting scope.py with look like:
python scope.py --args rtl=0 -N LNA:46 -f 853.2125 -S 2048000 -q 51 -V -T trunk.tsv
or
python scope.py --args rtl=0 -N LNA:46 -f 853.2125 -S 2048000 -q 51 -V
Any help is greatly appreciated. I'm a computer geek/tech, but it's been a long time since I've been into Linux, so that part has been a bit rough.
-Ryan
I've spent the last 8+ hours struggling to get OP25 up and running. I finally worked out the issues that were preventing my USB SDR stick from working. I've got OP25 to the point where I can see signals on the scope, but I still can't seem to get any decode of voice or control channel data.
I haven't been able to find the NAC for the system I'm trying to monitor, and I was figuring that may be my problem when it comes to voice decode. I setup my system in the trunk.tsv file, and tried to make use of NAC 0xF7E. My understanding is that F7E is somewhat of a wildcard NAC that will unmute all receivers, though I'm guessing OP25 isn't designed to do so. When calling the trunk.tsv file, I don't see any talkgroups pop up in the space above the frequency on the first tab. I'm thinking with the wrong NAC, any traffic is being ignored, hence not seeing talkgroups here. It's a VERY busy system, so if things were working, I'd expect to see something here in under a minute. From reading online (I think it was another post here, but can't remember at this point) I believe that simply opening and parking OP25 on the control channel without calling trunk.tsv should result in system information, including the NAC appearing in the Traffic tab. This tab remains blank in my case, unless I call trunk.tsv, in which case it populates the info from the file, and anything else remains as zeros. I have verified with my scanner and Unitrunker that I am on the correct control channel frequency, and that what I pulled from memory hadn't changed.
So, at this point, I feel I'm doing something wrong, I'm just not sure what. Every other problem I've managed to sort out with enough head-banging, but I've been stuck here now for a few hours.
My Unitrunker question is this...I understand Unitrunker used to come with kNACk, to decode NACs. I've seen it in my Unitrunker folder in the past. Upon reinstalling Unitrunker today for this project, I no longer see kNACk. I attempted the next version back, with the same result. I may have an older version which had it hiding on the network somewhere, but I'm not sure. Is kNACk no longer offered/supported? I thought maybe the feature was rolled into Unitrunker, but I can't seem to find it in any of the screens.
The signals are strong on the scope, as expected. I'm using an 800 rubber duck on about 3" worth of feedline, and can normally tell the control channel is there without an antenna connected. I pulled my SDR ppm correction value out of SDR#, so I'm sure that's correct.
For reference, the two lines I'm starting scope.py with look like:
python scope.py --args rtl=0 -N LNA:46 -f 853.2125 -S 2048000 -q 51 -V -T trunk.tsv
or
python scope.py --args rtl=0 -N LNA:46 -f 853.2125 -S 2048000 -q 51 -V
Any help is greatly appreciated. I'm a computer geek/tech, but it's been a long time since I've been into Linux, so that part has been a bit rough.
-Ryan