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TechnoWeenie
PostPosted: Fri Aug 03, 2018 1:00 am 
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Joined: Wed Jun 27, 2007 10:55 pm
Posts: 497
Location: Britain
RR is actually useful, heh.

Been running it for over a year....


It takes some setup, but having a phase 2 'scanner' for the cost of an SDR... love it.

There's also people putting it on Raspberry Pi 3.... Making it portable.

Install Ubuntu

Open terminal window
Code:
cd ~
git clone https://github.com/boatbod/op25
cd  op25
./install.sh


Then you'll need to set up text files for your systems.... defining system freq and NAC

Here's SS911 as test...

Code:
"Sysname"   "Control Channel List"   "Offset"   "NAC"   "Modulation"   "TGID Tags File"   "Whitelist"   "Blacklist"   "Center Frequency"
"SS911 Site 1"   "774.68125, 774.43125, 773.93125"   "0"   "0x1E1"   "C4FM"   "ss911t.tsv"   ""   "40108,40119,40113,40204,30204,40209,40210,40217,40246"   
"SS911 Site 2"   "774.48125, 773.98125, 770.60625, 770.35625"   "0"   "0X1E2"   "CQPSK"   "ss911t.tsv"   ""   "40108,40119,40113,40204,30204,40209,40210,40217,40246"   
"SS911 Site 3"   "773.73125"   "0"   "0X1E3"   "CQPSK"   "ss911t.tsv"   ""   "40108,40119,40113,40204,30204,40209,40210,40217,40246"   
"SS911 Site 4"   "774.70625, 773.20625, 774.20625"   "0"   "0X1E4"   "CQPSK"   "ss911t.tsv"   ""   "40108,40119,40113,40204,30204,40209,40210,40217,40246"
"SS911 Site 5"   "773.48125,772.93125"   "0"   "0X1E5"   "CQPSK"   "ss911t.tsv"   ""   


Tab delineated file.

Then run a lengthy command

Code:
cd /op25/op25/gr-op25_repeater/apps/
./rx.py --args -rtl=0 -N LNA:46 -f 772.13125e6 -S 2048000 -V -q 0 -T psrs.tsv -2 -U



and you're set!

There are other options for using a web interface as well...

Attachment:
op25.jpg


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nickcarr
PostPosted: Tue Aug 07, 2018 8:38 am 
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Posts: 2643
Location: Lost on 405
Could you make a short video of it decoding an IWN VHF site? Whichever site is strongest for you... just curious as to what it looks like. I have an extra laptop laying around so I may give OP25 a shot.
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TechnoWeenie
PostPosted: Tue Aug 07, 2018 11:32 am 
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Joined: Wed Jun 27, 2007 10:55 pm
Posts: 497
Location: Britain
nickcarr wrote:
Could you make a short video of it decoding an IWN VHF site? Whichever site is strongest for you... just curious as to what it looks like. I have an extra laptop laying around so I may give OP25 a shot.


It might be awhile. But sure...

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KE7JFF
PostPosted: Sat Nov 10, 2018 10:16 pm 
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Joined: Fri Jun 01, 2007 7:46 pm
Posts: 777
Location: Portland, OR
I'm going to have to try this on OSRP....

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