[op25-dev] Recent changes

'William Becks' wa8wg@centurytel.net [op25-dev] op25-dev at yahoogroups.com
Tue Dec 19 00:51:04 UTC 2017


Matt,

 

I am using an RTL SDR with my rx.py command line formatted  <./rx.py --args 'rtl' --gains 'lna:49' -f 146.460e6 -S 1000000 -q 0 -D fsk4 -V –U>

but no joy.   Please see the screen output below….   Any ideas?   Are you sure that I don’t need some sort of trunk.tsv? How would one 

input the desired NAC?

 

Thank you,  

 

Bill, WA8WG

 

linux; GNU C++ version 6.3.0 20170221; Boost_106200; UHD_003.009.005-0-unknown

 

gr-osmosdr 0.1.4 (0.1.4) gnuradio 3.7.10

built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy soapy redpitaya

Using device #0 Realtek RTL2838UHIDIR SN: 00000001

Found Rafael Micro R820T tuner

[R82XX] PLL not locked!

gain: name: LNA range: start 0 stop 0 step 0

setting gain lna to 49

supported sample rates 250000-2560000 step 24000

Exact sample rate is: 1000000.026491 Hz

[R82XX] PLL not locked!

set_center_freq: 146460000

p25_demodulator::connect_chain() demod_type=fsk4

Project 25 IMBE Encoder/Decoder Fixed-Point implementation

Developed by Pavel Yazev E-mail: pyazev at gmail.com

Version 1.0 (c) Copyright 2009

This program comes with ABSOLUTELY NO WARRANTY.

This is free software, and you are welcome to redistribute it

under certain conditions; see the file ``LICENSE'' for details.

op25_audio::open_socket(): enabled udp host(127.0.0.1), wireshark(23456), audio(23456)

p25_frame_assembler_impl: do_imbe[1], do_output[0], do_audio_output[1], do_phase2_tdma[0], do_nocrypt[0]

Exception in thread Thread-2 (most likely raised during interpreter shutdown):rock64 at rock64:~/op25/op25/gr-op25_repeater/apps$

 

 

 

 

 

From: op25-dev at yahoogroups.com [mailto:op25-dev at yahoogroups.com] 
Sent: Monday, December 18, 2017 5:54 PM
To: op25-dev at yahoogroups.com
Subject: Re: [op25-dev] Recent changes

 

  

Hi Bill,

 

trunk.csv isn't required for conventional. Here's a few exmaple commands I have used with my USRPs (via UHD) and airspy:-

 

./rx.py -S 2500000 -o 50000 -q 2 -f 434075000 --args 'uhd' -D fsk4 -P fft --gains 'PGA:10'

 

./rx.py -S 1000000 -o 50000 -q 39 -f 434075000 --args 'uhd' --gains 'PGA:40'

 

./rx.py -S 2500000 -o 50000 -q 2 -f 438187500 --args 'airspy' -D fsk4 -P fft --gains 'MIX:5'

 

 /rx.py -S 1000000 -o 50000 -q 2 -f 438187500 --args 'uhd' -D fsk4 -P fft --gains 'PGA:30'

 

Cheers,
Matt

 

 

 

 

 

On 19 December 2017 at 09:06, 'William Becks'  <mailto:wa8wg at centurytel.net> wa8wg at centurytel.net [op25-dev] < <mailto:op25-dev at yahoogroups.com> op25-dev at yahoogroups.com> wrote:

  

OK.  How does one setup the rx.py command line and/or trunk.tsv file if required to monitor conventional traffic?  Can you please post example configuration?

 

Thank you,

 

Bill, WA8WG

 

 

From:  <mailto:op25-dev at yahoogroups.com> op25-dev at yahoogroups.com [mailto: <mailto:op25-dev at yahoogroups.com> op25-dev at yahoogroups.com] 
Sent: Monday, December 18, 2017 2:43 PM
To:  <mailto:op25-dev at yahoogroups.com> op25-dev at yahoogroups.com
Subject: Re: [op25-dev] Recent changes

 

  

rx.py can already monitor conventional traffic. In fact this feature was there before trunking was.

 

On Tue, 19 Dec 2017 at 06:55, 'William Becks'  <mailto:wa8wg at centurytel.net> wa8wg at centurytel.net [op25-dev] < <mailto:op25-dev at yahoogroups.com> op25-dev at yahoogroups.com> wrote:

  

Graham,

 

Thank you so much for your efforts in the continuing development of op25.  Especially for the recent coding changes allowing for FQDN --wireshark-host command line entry.  The addition of the --nocrypt function was very innovative and solved an issue in my area where some talkgroups use a mix of clear, and encrypted transmissions that were previously impossible to reject without also filtering the clear voice transmissions as well..  

 

I am personally very grateful for the work that you and Max have done to improve the code.  If I could wish for one  new feature, it would be to incorporate code allowing rx.py to monitor conventional IMBE non-trunked transmissions.   Such a feature would be great for monitoring small non-trunked systems in addition to providing a great resource to monitor and analyze amateur P25 transmissions from MMDVM and similar devices.

 

Keep up the good work and best of holiday greetings!

 

Bill, WA8WG

 

 

From:  <mailto:op25-dev at yahoogroups.com> op25-dev at yahoogroups.com [mailto: <mailto:op25-dev at yahoogroups.com> op25-dev at yahoogroups.com] 
Sent: Saturday, December 16, 2017 7:08 PM
To:  <mailto:op25-dev at yahoogroups.com> op25-dev at yahoogroups.com
Subject: [op25-dev] Recent changes

 

  

For my version of op25 I've just pushed a change to support using hostnames/fully qualified domain names (or straight IP addresses) in the --wireshark-host command line parameter (-W).

Earlier changes include the addition of the source radio id (where available) to the terminal screen, as well as indication of when encryption is active (only applies when using --nocrypt command line option).

 

 



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