op25-dev

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308 discussions

Beginner's Guide To Setting Up OP25 From Scratch

by trunktracker＠tampabay.rr.com [op25-dev]

Is there any kind of a current step-by-step beginner's guide to setup OP25 from Scratch? Especially for using it on Windows. For example, I have VMware Workstation 12 Player version 12.5.2 installed on a Windows 7 64-bit machine. Is there a certain version of Ubuntu that we have to use? The link to download it https://www.ubuntu.com/download/desktop https://www.ubuntu.com/download/desktop has a version called Ubuntu 18.04.1 LTS and another version called Ubuntu 18.10. How do we know which one to use and what are the command prompt scripts that we should type to install OP25? Thanks.

6 years, 8 months

error message help [1 Attachment]

by n3zra＠yahoo.com [op25-dev]

I am very new to using Ubuntu OS and O op25. I cannot get the system running, my rtl sdr does work on the virtual box but op 25 is not starting. attached is the error message I am getting. I appreciate the the help. Thank you in advance. Andy N3ZRA

6 years, 9 months

confused [1 Attachment]

by n3zra＠yahoo.com [op25-dev]

I have finally gotten the OP25 and the virtual box to work again on my windows machine, now I am getting an error that I was not before. This is a fresh install of everything from virtual box onward. I get the following message when attempting to start OP25. Traceback (most recent call last): File ".rx.py", line 52, in <module> import op25 ImportError: No module named op25 Then it goes back to the command prompt. What does this mean? Attaching a screen shot. Thanks for the help. Andy

6 years, 10 months

Re: [op25-dev] P25 decoding using RTL_SDR

by Sean Kealy superstardodge＠yahoo.com [op25-dev]

Been away from this project for awhile, Where can I get a copy of the live cd? -------------------------------------------- On Sun, 7/15/18, gnorbury(a)bondcar.com [op25-dev] <op25-dev(a)yahoogroups.com> wrote: Subject: [op25-dev] Re: P25 decoding using RTL_SDR To: op25-dev(a)yahoogroups.com Received: Sunday, July 15, 2018, 7:05 PM Without further information (i.e. stderr.2 logs) it's hard to say for sure what the problem is. Most likely although your fft plot "looks" good you may not be accurately tuned. Typically you'll need to adjust ppm (-q parameter) to bring the tuning into alignment enough that the p25_demod locks on. When that happens you should see the TSBK counter start to increment. If you're using the "boatbod" fork you can use the mixer plot (key #5) to dial in the ppm and fine tuning more accurately than is possible with the fft plot alone. Furthermore, you can also use a nac value of 0 if you don't know or cannot verify the nac of the system you are trying to tune. #yiv5719345116 #yiv5719345116 -- #yiv5719345116ygrp-mkp { border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;} #yiv5719345116 #yiv5719345116ygrp-mkp hr { border:1px solid #d8d8d8;} #yiv5719345116 #yiv5719345116ygrp-mkp #yiv5719345116hd { color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;} #yiv5719345116 #yiv5719345116ygrp-mkp #yiv5719345116ads { margin-bottom:10px;} #yiv5719345116 #yiv5719345116ygrp-mkp .yiv5719345116ad { padding:0 0;} #yiv5719345116 #yiv5719345116ygrp-mkp .yiv5719345116ad p { margin:0;} #yiv5719345116 #yiv5719345116ygrp-mkp .yiv5719345116ad a { color:#0000ff;text-decoration:none;} #yiv5719345116 #yiv5719345116ygrp-sponsor #yiv5719345116ygrp-lc { font-family:Arial;} #yiv5719345116 #yiv5719345116ygrp-sponsor #yiv5719345116ygrp-lc #yiv5719345116hd { margin:10px 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6 years, 12 months

P25 decoding using RTL_SDR

by Nishant Parepalli nishantparepalli＠yahoo.in [op25-dev]

I have been trying to decode P25 signal using RTL2832U and ubuntu 16.04. I had run the rx.py script from the Op25 rep with the arguments. The FFT seems to be right. However I have no audio nor any NAC or tsbks being identified. Can anyone point out where I am going wrong? TIA

7 years, 1 month

SkyWave Linux

by Dick Wad bwmzzzx＠yahoo.com [op25-dev]

Has anyone else tried to use the SkyWave linux distro yet besides me? It's based off the Ubuntu 16 LTE. I have installed this to my laptop and then just for grins installed the boatbod version of op25 on top of it. To my suprise the op25 is working along with cubicsdr several other utilities on the distro. I was even able to use my hackrf and ham-it-up box to search around the lower HF bands too. I did try to load SkyWave onto my windows 7 laptop at work but it lost it's network ability. Still trying to figure that one out. Anyway, that's all and can't wait to hear some other stories regarding this as well. 73's

7 years, 1 month

Why can't I hear fire tones?

by nokoa3116＠gmail.com [op25-dev]

Before a fire dispatch they have a few beeps, I don't think it's for paging, I think just attention. They also have a beep everyonce in awhile in the police channel during restricted traffic. I cannot hear those using OP25, interested to know how I might get that to work?

7 years, 2 months

Control Channel timeout

by atms169＠yahoo.com [op25-dev]

Anyone run into this? 1528588736.792124 control channel timeout 1528588736.825383 control channel timeout Thanks

7 years, 2 months

RPi's 3 for 16GB or 32GB?

by atms169＠yahoo.com [op25-dev]

Anyone have an image for a 16GB or 32GB Raspberry pi 3? Using the RTL-SDR Thanks Aaron

7 years, 2 months

RTL-SDR and OP25 on Linux Mint 64-bit

by mpuppet＠yahoo.com [op25-dev]

Hello everyone, First of all: Thank you to the admins for granting me access to this group! :) I am a musician and IT professional living in southern California, but I have little experience with radio. I recently bought an RTL-SDR dongle (the silver one) and I successfully got it working on Win10 with HDSDR and DSDplus, so I can decode DSD and P25 phase I, mainly. I also have an installation of Linux Mint, 64-bit. I'm running everything on a gaming PC that I built, so it's got a lot of speed and RAM. Before I gained access to this group, I followed this PDF to setup the dongle on Linux Mint: https://ranous.files.wordpress.com/2018/02/rtl-sdr4linux_quickstartv2-18.pdf https://ranous.files.wordpress.com/2018/02/rtl-sdr4linux_quickstartv2-18.pdf I then managed to get OP25 installed. Once I gained access to this group and started to skim over the various tips and tutorials, I took a few days to decide what options I wanted to try: Raspi+OP25? Ubuntu 14.04 32-bit in a VM? Or stick with Linux Mint? I decided to try the Ubuntu 14.04 32-bit tutorial yesterday. I spent the entire day trying to get Ubuntu 32-bit installed in a VM before I realized it didn't like that I was trying to give it 16GB of RAM. 8GB did the trick. But after following the tutorial found here from 2017, OP25 generated a lot of errors and decided to put it down and go back to Mint for a while. Through the tutorials and RadioReference.com, I managed to find a local p25 control channel for the police. So I setup a trunk.tsv file and trunkk.tsv with the groups I wanted to listen to. As of this morning, I was able to run OP25 in a terminal window in Mint, tuned to 470.025, using rx.py. The command I am running is: python rx.py --args 'rtl' -g 65 -f 470.025e6 -N 'LNA:49' -2 -V -v 0 -S 1000000 -q 2 -T trunk.tsv The problem is, I'm not sure if it is working because: 1. I hear no audio (using an external sound module, alsamixer is working properly to route audio to this device) 2. When I run the script with the above command, my terminal window fills up with the error "tuning error +1200". The frequency displays in the lower left corner as 470.025000. Pretty sure I'm doing something wrong, lol. Any help would be greatly appreciated. Thanks, MP

7 years, 3 months

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