op25-dev

op25-dev@lists.osmocom.org

308 discussions

by ikj1234i＠yahoo.com

The RTL SDR sticks as mentioned seem to have delays when changing frequency that cause lost calls in trunking mode. I've added a new feature (updated in git branch max-trunking-update2 and in the wiki) which uses a software Local Oscillator instead of hardware retuning which essentially makes tuning instantaneous. There is a restriction that all of the channels to be tuned including the trunk CC must fall inside the tuning passband (whose width is equal to the sampling rate). See the SignalScope wiki page for more information. Outside of this, LSM trunking works very well now with RTL SDR Max

11 years, 6 months

Phase 2?

by Matt Mills

Does OP25 have any capability for Phase 2 at the moment? I've seen a couple things suggesting that various people have been working on it for a few years now, but nothing solid about what progress has been made. Just curious, as I have a few systems here turning on that are looking like they will be speaking phase 2. Thanks, Matt.

11 years, 6 months

gr-op25 recipe now in pybombs upstream

by ikj1234i＠yahoo.com

Haven't done a lot of testing, but it should now be possible to install gr-op25 (and all of its prerequisites, including gnuradio) simply by - cloning the pybombs repo - cd to the toplevel ---- cd pybombs - ./pybombs install gr-op25 Assuming no bugs, it should no longer be necessary to separately clone the gr-op25 repository, or to copy any recipes around... Also, the trunking changes have been merged into gr-op25 master, so the 'git checkout' commands shouldn't be necessary any more, either... Once the process has been more thoroughly tested, I'll be updating the wiki with these procedures Best Max

11 years, 6 months

Package gnuradio-core was not found error [2 Attachments]

by verymetl＠hotmail.com

I really hate bothering others, but I'm having trouble installing OP25 and don't know how to proceed. I'm getting a 'Package gnuradio-core was not found in the pkg-config search path.' error message when executing ./configure I'm running Ubuntu 12.04, and I have successfully installed GNURadio v3.7.2.1 from the build-gnuradio script on their install from source page. I've tested the install with an RTL dongle and a quick FM demodulator and it does function properly, as well as a spectrum plot. All the required dependencies for OP25 have been met, with the exception of the gr-4fsk package. It throws the same error as stated above. I've attached the logs for both installs, as they're too long to paste in here. I've Googled and searched here at op25-dev to no avail. I'd really appreciate any hints as to get past this last hurdle. I'm anxious to play with Max's LSM/CQPSK tools. Thanks for reading! -Scott

11 years, 7 months

chan_usrp in asterisk idea

by Ryan Schilder

Hi everyone, After getting the repeater working in op25/asterisk i'm still stuck with the problem of PTT control. I see on the app_rpt page there are instructions for modifying a CM108 usb sound card (which i attempted to order, but the order got cancelled because they are on backorder...). I was reading this page http://yo3iiu.ro/blog/?p=324 and was wondering if something similar could be done with the chan_usrp in asterisk (or soundcard_tx.py in op25). The part that interested me was using a serial connection to do the signaling for PTT. Just a thought, Ryan KC9GMY

11 years, 7 months

soundcard transmitter update

by Ryan Schilder

Alright all, good news! With Max's help I was able to get the p25 repeater working with Asterisk and app_rpt. I connected the audio out to a custom cable connected to my yaesu ft-7800r's data port. I did notice that if a ctcss tone is not specified a p25 stream will be constantly transmitted. This is the case if using an analog or p25 source. I still have to play with the levels a bit, but it seems to be working very well. Also, I was able to talk to other ham's on a local repeater using op25_audio_tx.py. They were able to hear my voice 100% (no dropped packets). This is very good news! -Ryan KC9GMY

11 years, 7 months

help with repeater

by Ryan Schilder

ok i'm about ready to pull my hair out with this one. Can anyone get the op25 repeater to work? I'm trying to run disc_tap.py and it always gives me the same error: chan_usrp_rx expected 4 arguments, got 3 I've looked through the disctap_rx.py and repeater.py at the appropriate lines. I see where disctap_rx.py is calling chan_usrp_rx with 3 variables, and i see where repeater.py expects 4 variables. Now what? -Ryan KC9GMY

11 years, 7 months

P25 at 800MHz

by Jacob Blanks

Hi folks! I don't no if this is the right way to request help regarding op25. Let me try :). I am trying Op25 decoder (scope.py) + USRP. Although I can get the air interface signal, the error rate is too high and the voice signal is rarely intelligible. The radio I have is setup in direct mode in 800MHz (a bit higher than the ones I saw in previous work). Using the signal analyzer app (osmocom_fft.py) I can detect the signal with a high power level using the same antennae and gain settings. I have already run the scope.py (osmocom) and got the audio and radio info. It seems that the scope.py+USRP request a high frequency offset (7.5kHz) to tune the carrier and try to decode the air interface signals. I have: USRP_N210+WBX+tuned_antenna+Ubuntu+GNURADIO-3.6.5.1+OP25_osmocom. May the higher frequency request another setup I missed? Am I missing many details? :) TIA

11 years, 7 months

Raspberry pi op25

by Ryan Schilder

Think it would be possible to make an op25 repeater out of a raspberry pi? I literally know just about nothing on the pi, so I won't be shocked if it's not possible. I've managed to get the transmit side of op25 working with a yaesu ft7800r. It would be sweet to get a cheap p25 repeater made. Just a thought. Ryan kc9gmy On Dec 24, 2013 1:21 AM, "Steve Glass" <stevie.glass(a)gmail.com> wrote: > > > The server is now back up and the git stuff all ok. To clone from git > you can just run: > > git clone git://op25.osmocom.org > > The wiki will need updating to reflect this and we shall start hosting > tarballs as attachments on the build instructions page. > >

11 years, 7 months

WARNING - op25.osmocom.org is temporarily going off the air

by Steve Glass

Hi Everybody! As I've mentioned elsewhere we're taking the osmocom trac instance offline whilst we switch to the new git repository. The site may be down for around eight hours or so. Once restored we'll have a period where the build guides do not reflect the current codebase. I shall modify the build guide (unless I can find a volunteer) to refer to the tarballs and have a subsection on building from git. All this is because we want to do more new things and we're trying to limit the number of build steps and external dependencies to make things easier to install and use. Once this is up we may even start responding to tickets :) Steve

11 years, 8 months

← Newer
1
...
17
18
19
20
21
22
23
...
31
Older →

Jump to page:

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

op25-dev