op25-dev

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312 discussions

H-DQPSK support?
by James Qiu 02 Mar '20

02 Mar '20

Hi, I'm new to OP25. I'm wondering if and when OP25 will support H-DQPSK demodulation. It's specified in Phase II of P25. I tried -2 option, but it didn't work. I used Anritsu LMR test box as the source. Thanks James

2 1

OP25, python, and the upcoming *buntu 20.04 releases - heads up and FYI....
by op25＠zellners.com 02 Mar '20

02 Mar '20

As part of my moves to resolve the cmake issue and testing 20.04 for new boxes for OP25 and other stuff.. ... Probably a bad idea to try to tackle both at once, but hey may as well go big! Well... there are some issues... *buntu and/or python are killing Python 2.7. While its in the repos now.. the info I am being advised it likely won't be in the release ... Neither of the python packages seem to be setting up the proper ENV vars, symlinks etc... but thats another issue... BUT GNURadio in the repo is setup for Python 3.7..so when its installed all the GNUR radio stuff is in the python3.7/ path, not 2.7/ For OP25-boatbod is this Python 3.7 compatible?????? If not, I am guessing theres going to be a problem as it likely won't run on 20.04 releases if the 2.7 packages are really removed.. and ONE is missing already (but its still early), python-waitress (the actual program DEB Is missing, but the doc DEB is there?? (Again we are still alpha early)), I can fix it and bring in the Eoan/19.10 one with a little hackery... I can get things to compile but I don't think its complete in the least.. and then attempting to run rx.py get the unable to import gnuradio.. as its not in 2.7 and some ENV var issues too... I'll look at the EVN vars to make it point to 2.7 properly like <20.04 but I am not sure thats going to fly as its all in 3.7 paths... see: :/usr/bin$ python3 Python 3.8.2rc1 (default, Feb 12 2020, 00:06:56) [GCC 9.2.1 20200203] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import gnuradio >>> quit(); versus: :/usr/bin$ python Python 2.7.17 (default, Jan 21 2020, 23:28:51) [GCC 9.2.1 20200117] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import gnuradio Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: No module named gnuradio >>> So this is a heads up that theres likely to be a lot more noise about op25-boatbod not installing/compiling etc...or at least possibly have to go to 19.10 via LXC container.. I'll keep you advised if I can make any progress... the cmake issue is resolved but it means going back to 3.10.. I couldn't get 3.12.x to work at all. cmake was pulled from source and compiled.

4 5

OP25 with AGC (automatic gain control)?
by James Qiu 28 Feb '20

28 Feb '20

Hi Currently I'm using a command line like: ./rx.py --args 'rtl' -N 'LNA:49' to adjust the LNA gain of the RTL-SDR. Is there a way to do AGC? Near me, the 700Mhz channel is really strong, but 800Mhz is really weak. So AGC would be very useful. Also if not easy, what other gain and ranges I can adjust? What's the max value for LNA gain? Thanks James

1 0

header intact
by efjoseph＠earthlink.net 18 Feb '20

18 Feb '20

header intact

1 0

OP25, SDR, DMR, TX
by Владислав Д. 22 Jan '20

22 Jan '20

Good evening, Would You kindly to answer a few questions about the OP25 project and how to organize a transmitter with it using SDR devices (RTL-SDR, LimeSDR)? In the creation process of DMR-standard transmitter in the GnuRadio environment, we came across the absence of some necessary blocks: 4FSK modulator, DMR encoder, packet shaper. Inside the OP25 project we found a file that contains some functionality of DMR TX (dv_tx.py), but only in form of code, not as a GRC block. Could you tell us does this file fully implements the TX-side of the DMR system and whether there is an analogue of it, in the form of a GRC block for GnuRadio? We will be very grateful if you can help us sort this out. Yours faithfully, Vladislav.

2 1

CMAKE Issues on current distros
by op25＠zellners.com 05 Dec '19

05 Dec '19

Any updates to fix the CMAKE issues? https://github.com/boatbod/op25/issues/25 d$ make [ 21%] Built target gnuradio-op25 [ 23%] Built target test-op25 [ 24%] Built target _op25_swig_doc_tag [ 26%] Built target _op25_swig_swig_tag [ 29%] Built target op25_swig_swig_compilation [ 31%] Built target _op25_swig [ 33%] Built target pygen_op25_gr_op25_swig_ac751 [ 34%] Built target pygen_op25_gr_op25_python_b78db [ 34%] Built target pygen_op25_gr_op25_apps_383eb [ 51%] Built target imbe_vocoder [ 78%] Built target gnuradio-op25_repeater [ 85%] Built target op25-d2460 [ 86%] Built target scan4sync [ 87%] Built target BER [ 90%] Built target test-op25_repeater make[2]: *** No rule to make target 'op25/gr-op25_repeater/swig/op25_repeater_swig.py', needed by 'op25/gr-op25_repeater/swig/op25_repeater_swig.pyc'. Stop. make[1]: *** [CMakeFiles/Makefile2:954: op25/gr-op25_repeater/swig/CMakeFiles/pygen_op25_gr_op25_repeater_swig_a9103.dir/all] Error 2 make: *** [Makefile:130: all] Error 2 ddejr@ddejr-pc:~/op25/build$ same result using "./install.sh" method http://osmocom.org/issues/4225 "make2: * No rule to make target 'op25/gr-op25_repeater/swig/op25_repeater_swig.py', needed by 'op25/gr-op25_repeater/swig/op25_repeater_swig.pyc'. Stop. make1: [CMakeFiles/Makefile2:874: op25/gr-op25_repeater/swig/CMakeFiles/pygen_op25_gr_op25_repeater_swig_26094.dir/all] Error 2 make: [Makefile:130: all] Error 2 [ 26%] Built target gnuradio-op25 [ 29%] Built target test-op25 [ 30%] Built target _op25_swig_swig_tag [ 32%] Built target _op25_swig_doc_tag [ 36%] Built target op25_swig_swig_compilation [ 38%] Built target _op25_swig [ 40%] Built target pygen_op25_gr_op25_swig_388ba [ 42%] Built target pygen_op25_gr_op25_python_4bea1 [ 42%] Built target pygen_op25_gr_op25_apps_383eb [ 63%] Built target imbe_vocoder [ 86%] Built target gnuradio-op25_repeater [ 89%] Built target test-op25_repeater [ 91%] Built target _op25_repeater_swig_swig_tag make2: No rule to make target 'op25/gr-op25_repeater/swig/op25_repeater_swig.py', needed by 'op25/gr-op25_repeater/swig/op25_repeater_swig.pyc'. Stop. make1: [CMakeFiles/Makefile2:874: op25/gr-op25_repeater/swig/CMakeFiles/pygen_op25_gr_op25_repeater_swig_26094.dir/all] Error 2 make: * [Makefile:130: all] Error 2" This breaks OP25 for dummies the most used HOWTO... and even using just the standard git and running the install.sh

2 1

Attribute Error: 'file_source_sptr' object has no attribute 'set_gain_adjust'
by Bender, Theresa 25 Jul '19

25 Jul '19

I'm trying to make a OP25 Transmitter with a B200 mini, as in the video. I'm using the same command line as in the video (./dv_tx.py -p p25 --args 'uhd' -t ./1011.dat -r -Q 430137500 -q 1 -gains 'PGA:90 -v 3 -i 400000). I keep receiving the error "Attribute Error: 'file_source_sptr' object has no attribute 'set_gain_adjust'". I'm new to using SDRs and the B200 mini, so I'd appreciate any advice! Thanks!

4 12

Logging functions Q's
by scancaster＠scancaster.net 24 Jul '19

24 Jul '19

Before I go down a hole and end in a dead end.... I have some questions on using the -L option for "logging." Logging in my universe means logging the audio to Dictaphone/tape/disk/CD/what ever physical media... NOT the -v option, thats a log, not logging! :) ;) So after reading about 30 different files on this -L option, it appers that it will act as A LOGGING RECORDER and RECORD the audio to disk... Great! What I am after is to record UNKNOWN GROUPS for analysis for ID purposes.... My question(s) are what options are used with this for: rx.py trunk.tsv whitelist.tsv blacklist.tsv ie: rx.py example ./rx.py --args 'rtl' -N 'LNA:47' -S 2400000 -f 8xx.xxxxe6 -o 25000 -q 72 -L 4 -v 10 -T trunk.tsv -V -2 -U -O loop0 -M mysystem.json -l http:192.168.0.26:8080 -x 3 2>> stderr.2 trunk.tsv then REQUIRES a "center frequency" for the system... 8xx.xxxx based on the channels of the system... I've determined this for this system, and it will just fit the way this is setup. This will then RECORD the various groups that are NOT BLACKLISTED to disk as WAV's from what I understand... Correct???? Ie: OP25 tunes to a group, it records it. Anything that is exlusive of each other on this -L option with other optons for rx.py???? Any thing I am missing in this????? Goal is simple to log any group I've not blacklisted as known user/use.. Thanks.

3 2

A couple Q's - RID Aliases? CC Data
by op25＠zellners.com 26 Feb '19

26 Feb '19

In reviewing the various setups of trunking_file.tsv, id_file.tsv etc... and looking over various documentation, I am not seeing a means to do RID(LID) or Radio ID aliasing... I am I missing this some place??? The systems can be setup to alias out $47E136 as "Helo1" etc... The systems have places to do this from the start and update from consoles etc... Any way to do that in OP25???????? ie: rid.tsv 47e136 Helo1 47e137 Helo2 etc... Turning RID into an alias would be a plus to ID units... ie: Ladder1, Ladder1_Portable, FF152521, etc.. Many of these are pretty static.. now some depending on you agency(s) may not be... in on a particular group would need some updates each year, as they change based on a progression system. CC Data is there some sort of aggregate that determines the quality of the CC data coming out???? That can accessed programmatically??? Or maybe that question is better referenced as is the there something that documents the API to OP25 that the various python scripts are using to possible do what I want... The plots are not useful as I desire text data to use in another place.... So I guess something that documents interacting with the underlying mechnations of OP25 would probably help to do what I am after with the CC. Thanks.

2 6

Audio Dies Pt2 and JSON meta tags????
by op25＠zellners.com 25 Feb '19

25 Feb '19

As the next round of P25 PII systems take hold in my area... OP25 is the goto solution... but... Audio dying is not a good thing... to send out silence on feeds.... Seems this is related to the metatag update when using -M tags.json option with rx.py... Whats frustrating is Pi3B+ with a cheapo junky asian dongle WORKS with -M tags.json and the audio goes on... .. I have another issue not related to that, which a commit fixes, just can't update to handle that right now... A DUAL CORE laptop with a junk asian dongle... the audio dies after awhile. SAME DUAL CORE laptop with a V3 Blog dongle... audio dies after awhile SAME DUAL CORE laptop with V3 blod dongle, REMOVE the -M option and the audio seems to be stable out to loop0! URRRGGRRRHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH! The only thing I can seem to possibly pinpoint is my standard A1 whipping or flogging boi,,, puslecrapdio! RURRRRRHHGHHH! The laptop has it the Pi3 doesn't.... Any one else seeing similar ? ? ? ? ? Once I have a new image setup for my Pi feed boxes.. and if that works reliably great...it seems to on my existing feed, other issue not witstanding..... Jusy annoying that a laptop has these issues where as a Pi3B+ doesn't...... I am grasping for answers here... and as I said... my standard A1 whipping or flogging boi,,, puslecrapdio! just gets my attention and foucs as the problem area. So to wrap up my screed and vent BS post.. .:) ;) Any seeing similar with xUbuntu's 18.04 or even other distros on lap/desktops v. Pi3B+??? Welp... there goes my theory in the time it took to type this OP25 is now not playing audio out loop0 again, and no -M option was used.... CC channel did rotate... (Harris nee M/A-COM system)??? So maybe CC rotation kills audio ? ? ? ? Any one with ideas? ? ? ? Bueller????

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