If your goal is getting OP25 working, your best bet is to stick with the distribution that has been tested and has installation instructions, Ubuntu 14.04. http://releases.ubuntu.com/14.04/ http://op25.osmocom.org/trac/wiki.png/wiki/InstallInstructionsPage

I installed an Ubuntu 14.04 VM, copy/pasted these instructions, and had OP25 running quickly. It's pretty easy with the instructions.

Tom

On Sat, Mar 25, 2017 at 5:34 PM, lists@lazygranch.com [op25-dev] < op25-dev@yahoogroups.com> wrote:

I've yet to get op25 to run.

That said, if you are really starting from zero on Linux, you might want to try:

http://skywavelinux.com/

I've been running suse then opensuse since the 90's, so I'm just too stuck in my groove. ‎

Starting from scratch on Linux, there are the Debian derivatives, or Debian itself. Then there are the rpm based Linux like Red Hat, Fedora, Opensuse.

If your computer uses UFEI, you may want to verify Linux will load or see if you can disable UFEI.

Opensuse will dual boot nicely. You can send me email directly on how to set it up, but like I said, I've yet to get op25 working.

*From: *Chuck Kelsey wb2edv@roadrunner.com [op25-dev] *Sent: *Saturday, March 25, 2017 5:05 PM *To: *op25-dev@yahoogroups.com *Reply To: *op25-dev@yahoogroups.com *Subject: *[op25-dev] New member question

Hello all. I am new on this list as of Thursday, so hopefully I'm not asking something that has been covered a bunch of times. I did try a search first on the web page.

Anyway, I'm interested in finding how to use OP25 to listen to our new county P25 phase 2 simulcast system. I've listened to the system with a scanner and the results were pretty dismal. Some have told me that OP25 puts the scanners to shame.

I understand that OP25 works on Linux, but not sure of system requirements. I believe I read that a Raspberry Pi3 won't cut it. While I use a Linux machine for AllStar, I don't really know much about the operating system (someone provided me with an image on a disk that self-loaded).

So, please keep it simple.

Chuck WB2EDV

Tom,

Are you listening to P25, phase 2 simulcast? If so, how are your results and what hardware are you using/

Chuck

On 3/25/2017 9:34 PM, Tom Hayward tom@tomh.us [op25-dev] wrote:

If your goal is getting OP25 working, your best bet is to stick with the distribution that has been tested and has installation instructions, Ubuntu 14.04. http://releases.ubuntu.com/14.04/ http://op25.osmocom.org/trac/wiki.png/wiki/InstallInstructionsPage

I installed an Ubuntu 14.04 VM, copy/pasted these instructions, and had OP25 running quickly. It's pretty easy with the instructions.

Tom

Thanks for sharing Tom.

I gave a listen for a short period. A lot of the traffic was rather difficult for me to understand. There were times I could tell what was being said, other times not so. Probably about 50/50.

Our system is currently still patching digital over to an analog channel, so it's a mix of both depending on the user. For some reason the digital traffic is a lot easier to understand. 90% of the time it is copyable. The remaining 10% is lost to the technology and I can't pull it out with my ears. The stuff still analog is, well, absolutely great.

The Uniden scanner I had for a short while (programmed it for a friend) was pretty dismal on digital.

Chuck

On 3/26/2017 3:38 PM, Tom Hayward tom@tomh.us [op25-dev] wrote:

On Sun, Mar 26, 2017 at 7:49 AM, Chuck Kelsey wb2edv@roadrunner.com [op25-dev] op25-dev@yahoogroups.com wrote:

...

Tom,

Are you listening to P25, phase 2 simulcast? If so, how are your

results and what hardware are you using/

...

Chuck

Yes. Have a listen yourself: http://allstar.kd7lxl.hamwan.net:8000/

It's monitoring two talkgroups, so if it seems like it's cutting between two conversations that is why. Compared to my Uniden scanner there is a lot lower latency at the beginning of each transmission (the Uniden will miss the beginning of the transmission).

Hardware is

• 1090 MHz ADS-B antenna at about 20 ft.
• SMA tee (other side goes to the ADS-B receiver). This messes up the

impedance, but not really a big deal for receive.

• NooElec RTL-SDR with TCXO

https://smile.amazon.com/gp/product/B01HA642SW/

• Intel NUC DN2820FYKH with Intel Celeron N2820 (I know I said I

started with a VM, but I transitioned to the Nuc for permanent installation.)

Biggest outstanding issue I want to correct is audio level equalization / compression. The dispatch consoles seem to a lot hotter than most of the subscriber radios. I have not been able to get LADSPA dysonCompress to work.

Tom