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I was also able to copy and paste the data from Radio Reference like Matt R. above. P25 Decoding The plugins use an external hardware AMBE+ 2 vocoder for voice decoding and the P25 Phase 2 I used the Description field from Radio-Reference as the description in my .tsv file. Download the Latest Release. RMason said: The frequency range of the North Carrollton site is 771.13125 - 773.81875. built-in source types: file osmosdr fcd rtl rtl_tcp uhd plutosdr miri hackrf bladerf rfspace airspy airspyhf soapy redpitaya freesrp The 436 can have issues decoding simulcast systems. Works great on my dedicated Linux Mint 19.3 12 year old HP machine with RTL-SDR V3. The audio is excellent. Im a complete noob to this radio stuff, just got my rtl-sdr a couple of weeks ago, and just learned to follow the phase I signals with unitracker a couple of days ago. All other TGs will be ignored. To use these drivers you must have a current USB-1 cable that uses the PL2303HXD chipset. Navigate to the op25/op25/gr-op25_repeater/apps folder and find the file called trunk.tsv: Make a copy of the trunk.tsv file and re-name it to the name of a local P25 system in your area. AirSpy dongles have 3 separate gain settings which each have a range of 1-15, and you do not need the "--gains" part in the syntax. To install the Osmocom version, run the following commands one-by-one in a terminal window: 1. sudo apt-get install git Would really appreciate a little help if you can spare the time. pi@raspberrypi:~/op25/op25/gr-op25_repeater/apps $ ./rx.py args rtl -N LNA:47 -S 2500000 -f 773.95625e6 -o 17e3 -q -2 -T trunk.tsv -V -2 -U 2> stderr.2 I have been using a Raspberry Pi 3 B+ with trunk-recorder installed and its doing a great job on decoding and recording P25 Phase 1 traffic, but when the network recently started carrying Phase 2 traffic, all it records were garble and unintelligible traffic. Save the file and close it. user@user-virtual-machine:~/op25/op25/gr-op25_repeater/apps$ sudo ./rx.py args file -i cow -O pulse Run the Boatbod version using rx.py and observe the following: The Plot button opens a new screen with a list of plots you can choose from. The spectrum plot (option 1 plot) does show the peak for the control channel that Ive selected. SignalsEverywhere: P25 Trunking with Just Thanks for the info! make[1]: *** [CMakeFiles/Makefile2:954: op25/gr-op25_repeater/swig/CMakeFiles/pygen_op25_gr_op25_repeater_swig_a9103.dir/all] Error 2 Once you've got your RSP2 running satisfactorily in analogue modes, you can download and install DSD+ to do the decoding. Digital Speech Decoder (DSD) is an open source software for decoding P25, C10e, DMR, DMRC, P25 Phase 1 and P25 Phase 2 digital. Both conventional and trunked frequencies will be returned, as well as both Phase 1 and Phase 2 frequencies. More P25 messages are now decoded. The frequencies can easily be received with an RTL-SDR, but a decoder is required to be able to actually listen to the voice. WebThe WiNRADiO WR-DRD-172 APCO P25 Phase 2 Decoder is a smart and handy decoder dongle that provides a hardware codec for single channel reception of APCO P25 digital transmissions. OP25 does not show patch information if TGs are patched. With both the quality of APCO P25 was poor. DSD+ 2.212 allowed encrypted DMR and NXDN to be passed (or i think muted with -e switch set). Plug your dongle(s) into your PC. P25 Decoding: OP25 + RTL-SDR vs anyone else see this? A Look at Project 25 linux; GNU C++ version 7.3.0; Boost_106501; UHD_003.010.003.000-0-unknown, gr-osmosdr 0.1.4 (0.1.4) gnuradio 3.7.11 Save it as the Use Text CSV Format. P25 TDMA Control Channel decoding -- requesting help from experts For example, entering 500 means a priority of 5 and a color code of 00. For discussion of software applications which decode digital voice formats and trunking control channels. Hi. ), Now take note of the way I changed the file. Click through any introductory screens and let the Software Updater do any updates. To run DSD+. The frequencies can easily be received with an RTL-SDR, but a decoder is required to be able to actually listen to the voice. Tried it with out. If you look at the pic below the CPU usage is 40% however to get this picture I was running a VNC server as well so some of that usage is almost certainly the VNC session. The sixth command runs the install.sh installer file to install OP25 and will take a while to finish. You now have both versions installed in separate virtual machines. To perform tasks and install software in Linux, you can use commands in a terminal window. To run your command line, change the -T trunk.tsv argument to whatever the name of your file is (for example, -T anytown.tsv). so cant even run GQRX. The way it works today is that it will jump from the control channel to a listening channel to listen to a specific talk group. This combination does a great job of not missing any traffic. Can different P25 talk groups (or groups of talk groups) be sent to different UDP/Streamed Network Destinations? For APCO P25 phase 1 and phase 2 requirements please refer to WiNRADiO Digital Radio Decoder. I made the SysName = NewBern, then put my control channel frequency in, put the NAC I copied earlier in, and then told it the tag file was named newbern.tsv Under modulation there are only two types, CQPSK or C4FM. Column C This is optional in the Osmocom version only (leave column C blank for Boatbod). 35. Well I love this. args=ARGS device args Now my assumption here is that you are using a generic RTL-SDR device. Unitrunker P25 Phase 2 C4FM top of the FMP24 scan list file it should give some examples. self.open_file(options.input) It turns out that the system that generated the NAC is a P25 in test using one of the alternate control channels. https://osmocom.org/issues/3776. If its not simulcast, enter C4FM. Keep messing with the q number until the signal is centered on the plot. Web1-16 of 76 results for "p25 phase 2 scanner" Results. OP25 is a Linux based P25 digital voice decoder which works with RTL-SDR dongles. P25 TDMA Control Channel decoding -- requesting help from Then run the following command to change the serial number from the default of 00000001 to 00000002: Review the configuration information and enter y to make the change: Now you must unplug the dongle and re-plug it back in for the change to take effect. (Luke AFB Arizona). Instead of using Firefox inside of VMWare, you can use a web browser in Windows 10 outside of VMWare. (On the other hand, Alpha Tag probably matches what the official system users actually see on the front of their radios.). I would like to constantly monitor the control channel with a single dongle and let the others take care of bouncing around. I live in British Columbia, Canada. thank you John (and also boatbod) for this post on your blog, i believe you have helped so many people to know OP25, simple and powerful P25 trunktracker. Disregard my last post. Adding the -b9.5 option corrected most of my P25 Phase II reception issues. Police Scanner Software Downloads WebDSDPlus is a Win32 application capable of reliably decoding multiple types of digital audio formats commonly found on VHF, UHF and 800 MHz, including (but not necessarily The recent dsd+ has supported p25 phase ii decoding but i don't know how to use it. ImportError: No module named op25. Time Division Multiple Access (TDMA) is a generic name for digital transmission formats that subdivides a (12.5 kHz) channel into a fixed number of time slots (usually 2) during which digital data and voice is transmitted, on and off in increments of millisecond. ? Carroll. Voice/Control Channel Decoding Software; 2. Pingback: OP25 For P25 Phase 2 Digital Voice Decoding | VA3DBJ.ca. Outstanding write up. I find sometimes the encrypted silenced talkgroups, over ride the non-encrypted ones and I miss some of the information. Sysname Control Channel List Offset NAC Modulation TGID Tags File Whitelist Blacklist Center Frequency blacklist dvbusbrt128xxu This guy explains whitelists (same could be used for blacklists) better than here. Thank you. Drove me nuts figuring it out. Replies 30 Views 1K. Im not sure why but this system has a better sound than others that I use and like. I see a new scanner purchase in the not too distant future, but I couldnt beat the cost of the RTL-SDR to find out what is or is not encrypted before spending a minimum of $350 on a new one. OP25 More OP25 Questions. NOOELEC NESDR SMART Is there any (portable) radio out there that can successfully receive the various fire departments from Whistler to Chilliwack that uses the P25 Phase 2 radio system? Jun 16, 2023. maus92. By using GQRX or some other program? Close terminal and open it back up. -2 Enables decoding of Phase II P25 voice calls. I use DSDPlus FastLane with the scanner feature and it seems pretty fast. For part 2 of our SDR Trunk series we will be showing how to set up a P25 phase 1 system by importing from Radio Reference and how to input it manually. Launch the terminal, go to you to your user home directory with the cd command: After compiling, either via install.sh or following OP25s included compile instructions, running rx.py returns this error: Traceback (most recent call last): SDRTrunk vs. OP25 Re: Can SDRPlay RSP2 Decode P25, Like most other receivers the RSP2 can receive ANY mode, but it can only decode them with the help of third-party software (like DSD+). However when I run the last command indicated this is what happens. Uniden Bearcat SDS200 Police Scanner | ScannerMaster APCO P25 is a digital voice signal and is commonly used like public safety departments such as police and fire. Some municipal areas are upgrading to P25 Phase 2 so almost gone are the days that you can track them with a police scanner since P25 is a Trunked Radio system and not just a lone frequency to monitor. E: Unable to locate package https://github.com/boatbod You are using an out of date browser. All dongle(s) should now be checked: RTL-SDR dongles should look something like this: RUNNING OP25 WITH ONE (1) DONGLE USING rx.py. You can use just 1 dongle. #2 shows clusters in the NW and SW corner with the eastern half a continous arc rather than clusters. RASPBERRY PI 4 MODEL B I need the P25 Phase II so I can continue with my beloved hobby of SDR monitoring OKCPD when their P25 PII system is completed. After making your changes, save the .tsv file by clicking the red down arrow button in the upper-left. Save this and exit. This is because P25 Phase 2 uses a different modulation and coding scheme than P25 Phase 1, and requires specialized decoding algorithms that are not currently implemented in Unitrunker. The paper details flaws in the DES-OFB and I can't get a driver to work with it on windows? 100, 101, 102, etc.) Then enter just one (1) local P25 trunking system like so: Column A This is the name of the system as it will appear on the screen when you run OP25. I hope I made this easier for someone. Just plug it into your PC USB interface which is also used to power the decoder unit, install the software and enjoy the world of digital transmission decoding. The only think close would be trunk recorder, which is a path really dont want to take due to its intense use of resources. -A, audio-if soundcard IF mode (use calibration to set IF freq) Do you have to setup a new line with the nac and the whitelist every time? Great tutorial!!! First time link user (ubuntu18-04) how and where can I check my build to ensure all is their and what not and something to compare to, I am linux stupid, but this tutorial helped me out a lot thank you. My question is, how do I know which talk group is linked to which control channel, or does it matter? I cant seem to get the people at radioreference.com to enter correct data. I get to the point in the install that I send the rx.py line then I get errors and go no furtherI get messages say things like source failure etc and I deleted the last two commands but no joy Youll hear the transmissions echo in the video. Where can I find the delay settings? Features: SDRPlay RSP tuner support (API versions 3.07 - 3.11) Airspy Discovery HF+ support. Project 25 IMBE Encoder/Decoder Fixed-Point implementation Tuner 1 is receiving the Control Channel (151.010 MHz) with FMP24, and DSDPlus appears to be decoding the channel. One dongle continuously receives the trunking channel, and a second After youve physically plugged them in, you need to virtually connect them in VMWare. I see the site frequencies for each site but nothing for the county in particular. Regards. Enter talk group IDs separated by commas with no spaces that you want OP25 to never stop on (such as encrypted TGs, for example). Start CC-FMP24.bat, CC.bat, VC-FMP24.bat, VC.bat all 4. no virtual cables used. Jeff, I think you and are are seeing the same problem. #1. << >> Double side arrows function the same as the < > single side arrows, except that the increment is 1,200 Hz instead of 100 Hz. To use more than 1 dongle with OP25, you need to know the serial number of each dongle to tell OP25 which dongle is used for what purpose (voice calls or control channel). have you tested the SDR under Linux? Decoding of Harris patch/simulselect data has been added. import op25 But you only need one of these to track a trunked radio system. Sarah's GUI software I believe their is enough processing power in modern devices to handle this. Jun 23, 2023. wgbecks. With proper decode, TSBK should show numbers changing that continually increase. JoeBearcat said: If they use P25 Phase II odds are they may also be simulcast (if not encrypted). OP25 is a program that decodes P25 Phase 1 and Phase 2 digital radio. Took a couple extra steps to get it working but man, this is amazing! so i Thats the short version. Uniden BCD325P2; Uniden BCD436HP; Uniden BCD536HP; Uniden BCD996P2; Uniden BearTracker 885; Uniden HomePatrol-2; Uniden SDS100; Monitoring Louisville Metrosafe. 5. cat gr3.8.patch | patch -p1 ./install.sh. OP25 For Dummies - Or how to build a police scanner for $30 Older rtl dongles needing significant ppm correction will probably still have to be set up somewhere close for tracking to be effective, but modern dongles should be largely plug an play. -U Tells OP25 to play the audio from voice calls to your default sound output device. I follow all the steps and can get everything to work until I add the .tsv file in. Unitrunker decodes Phase II control channels just fine. It works like a champ. Here is an example of what to run in the terminal window for an RTL-SDR dongle (Osmocom version): ./rx.py --args 'rtl' -S 1000000 -n --gains 'lna:28' -T trunk.tsv -P symbol,constellation -2 -U -l http:0.0.0.0:8080 2> stderr.2 -X. [R82XX] PLL not locked! Trying tune MERA (Marin County) and get a GNU constellation plot that looks like a semicircle from +5 to +5 using control frequency 489.075. File ./rx.py, line 690, in __set_rx_from_osmosdr This will basically function like a Linux PC that you run inside of VMWare in order to run OP25. under certain conditions; see the file LICENSE for details. Enter the filename here, or leave it blank. But I am still in the process of getting this up and running. ok yeah i did that previously. ITEM: 1904096. Computer Aided Monitoring and Programming, Automatic USB driver installer for FTDI and LibUSB drivers. thanks to the others that helped too. To run multiple dongles in OP25, you will now use multi_rx.py instead of rx.py, described next. The fix for me and, from what I can tell, a few others, was to revert cmake to 3.10.3. After installation Sarah shows how to configure the software in order to properly follow a trunked P25 system. WebCS-R8600 "Cloning Software" (Versions 1.10, 1.20) [Made in Japan] of digital protocols : Baudot RTTY, D-STAR, NXDN (4800 and 9600), dPMR, DCR (Digital Communication Radio) and APCO P25 "Phase 1". On that screen you can start GNUPLOT by pressing the number 1 key. Theres also a strong signal on alternate control channel 853.6875. My observation appears to correct this. After installation Sarah shows how to configure the software in order to properly follow a trunked P25 system. RadioReference.com Forums Therefore, OP25 uses a file in the apps folder where parameters can be entered and saved rather than having to type out lots of command arguments everytime. im completely lost. I googled it extensively and have come up empty handed. Project 25 IMBE Encoder/Decoder Fixed-Point implementation I run op25 latest build on a pi b+ and now and then the system just locks up on me. Mar 29, 2020. Thanks. OP25doesn't care if it's Phase 1 or Phase 2. Awesome! Again, the fix for me was to uninstall cmake 3.13.x and build cmake 3.10.3 from source (only way I could get it to compile OP25 correctly pointing cmake at the earlier version without installing it on the system wouldnt fix the error). Ok, So far this is working out amazingly. Log out of Ubunto and then log back in again. Ubuntu includes a spreadsheet application called LibreOffice Calc which is similar to Microsoft Excel and can be used to edit .tsv files. I had to set my -S to 1000000 to get it to work, after that it was fine. ./rx.py args rtl -N LNA:47 -S 2400000 -f 853.8625e6 2>stderr.2. John, greetings from the Triangle. Plots with nice clean lines indicate a good high-quality decode. Email me if you want and perhaps we can problem solve this. I finally got the python error messages to display and DING!, oops i mean ding! It is capable of decoding both Phase 1 and Phase 2 systems. If your cable was bought before 2013 you need to buy a new cable. Voice/Control Channel Decoding Software . -i INPUT, input=INPUT. To stop running OP25, go back to the terminal window and press Ctrl + c. With rx.py, the dongle is tuned to either the control channel frequency or a voice frequency, but not both at the same time. I listen to the fire departments in my area, but the police who are encrypted are on the same control channel and I will sometimes miss the dispatch of a fire call because a silenced talkgroup is active. This is badass! ; Go! SDRTrunk has some of the best sounding P25 audio I've heard, coming as close to an APX as I've heard with my own ears. #1. For example, if the NAC is 9D1, enter 0x9D1. after typing: I have confirmed its saved as .tsv not tsv.csv. for some reason the CTRL+X, Y, Enter was missed when I tried to post comment. While I just recently got a Uniden BCD436HP handheld to monitor thes services, I have since discovered the whole world of SDR, which intrigues me, and sounds like fun. It runs in the Linux operating system and utilizes a website called GitHub which is used by software programmers to share and update software code. I wrote up a quick explanation how to was able to get this working on a Chromebook. To install the Boatbod version, open/play your Boatbod virtual machine in VMWare to boot up Ubuntu (we will install the Osmocom version next). As for phase i, the source audio is sent to dsd+ using the NFM demodulated results of sdr# ,but for phase ii how to do it?Do we need a CQPSK demodulator in advance or it can directly demodulate the raw signal ? Thanks for this tutorial. #13. Is there any way to modify one of the files to output the frequency and talkgroup info to a simple 162 LCD panel? Is there any chance we could get a live CD or VM as Ive followed all of the instructions and it simply does not work on Ubuntu 18.04.4 LTS, Even reading from a file does not work Errors like this. Updated the handling of neighbour network sites in P25 neighbor lists. Column I Center Frequency, leave blank for now. P25 Phase 2 And just for info the -n option in OP25 somewhere near the beginning of the will block the encrypted squeals that can cause loved ones to vote you off the island. So i guess dont run untrunker anymore? Have you managed to find out how to do this, I am still very interested. Please help. Have it up and running on Pi 3B+. I can see the TGIDs in the DSD+ window. P25 supports encrypted voice. #5 graph confirms the control channel is tuned Voice/Control Channel Decoding Software The recent dsd+ has supported p25 phase ii decoding but i don't know how to use it. Added P25 TDMA control channel decoding. Now the .bashrc file should be visible. The first command installs the ability for Ubuntu to access the GitHub website and download files using terminal commands. Which format they. TSBK stands for Trunking Signal Block. If you find something I should add feel free to go to my contact page and email me. Just plug the dongle into your PC, install the software and start to decode transmissions. Open a terminal window and go to the op25/op25/gr-op25_repeater/apps/ folder by entering the following command: The syntax ./ is used in the terminal window to tell Linux to run an executable file. 6. OP25 is an advanced open source digital voice P25 Phase 2 capable decoder which can be used with an RTL-SDR and run on a Raspberry Pi. user@user-virtual-machine:~/op25/op25/gr-op25_repeater/apps$ sudo ./rx.py args file -O pulse This thread is more about beta testing the P25 Phase II early development version. I had this working great for a few weeks but then i got a software update thru ubuntu yesterday and now its broken. The second command installs essential Linux tools that give you the ability to do more tasks in a terminal window, such as running sudo make commands that are needed to install software. ./rx.py args rtl -N LNA:47 -S 2400000 -f 859.7625e6 -T trunk.tsv -V -2 -U B/LIST Blacklist, this is a temporary lockout. Then, add those channels into the blacklist field in trunk.tsv you can put more than one talkgroup in that cell, separating them with commas. Great instructions. There is a file called rtl_eeprom.exe that you can use to change the serial number, which can be downloaded here: https://ftp.osmocom.org/binaries/windows/rtl-sdr/. NOTE: TO EASILY INPUT TALK GROUP DATA GET A PREMIUM MEMBERSHIP AT RADIOREFERENCE.COM ($30 per year) AND YOU CAN DOWNLOAD SPREADSHEETS AND JUST CUT AND PASTE THEM INTO YOUR TSV FILES BELOW. On the Pi I see it tracking the calls and decoding. Thread starter Hmaxim; Start date /01/31 10:10:39 NXDN9600 decoding enabled 2019/01/31 10:10:39 DMR/MotoTRBO decoding enabled 2019/01/31 10:10:39 P25 Phase 1 and Phase 2 decoding enabled 2019/01/31 10:10:39 X2-TDMA decoding enabled Anyone know what else I can try to get the NAC I need to continue or can I get the NAC elsewhere. WebProject 25 (P25 or APCO-25) is a suite of standards for interoperable digital two-way radio products. Would like to free up a display and make the whole setup portable with the LCD as the display. Voice/Control Channel Decoding Software; 2. Thank you so much for the detailed instructions. P25 Decoding DSDPlus OP25 also allows one to TRANSMIT ysf (and dstar and dmr). Did it stop working for you on 2019.01.18? I cant believe how easy this was to set up, thanks to your instructions. Wait a bit for it to install. Lets find the trunked system to follow. @ashleigh The issue I kept having is it needed a 0 in the offset column, that and double check to make sure its not saved as trunk.tsv.csv it should be trunk.tsv , The issue was that gnuradio didnt find the RTL-2832U SDR due to bug #528 The following website solved that issue: I too am wondering if there is a way to have multiple dongles monitoring different frequency ranges? It works like a champ. I am installed on a pi 3B+. What size is the power brick you are using? GOTO This gives you a pop-up box that lets you type a TGID that you want to listen to. Yes sir. SignalsEverywhere: Using DSDPlus Fastlane for JavaScript is disabled. So my dongle appears to be fine. self.tb = p25_rx_block(self.options) seeing 4 or so voice frequencies updating but no audio coming through? The program will still be displaying the stream of calls, but stops decoding voice. The Hudson County system is definitely simulcast. No sound. With the latest Fast Lane release, I moved to a single RTL-SDR configuration. I ALSO FOUND I CAN DO THIS WITH AN ADALM-PLUTOSDR BY CHANGING THE ARGS TO plutosdr. Wow, thank you for writing this up! Required fields are marked *. cd In the comments below Mr. Alex Bowman found an easier way to launch the program. Quick Call on P25 trunking If you enter any IDs here at all, OP25 will only stop on those TGs and nothing else. -a, audio use direct audio input Digital Speech Decoder (DSD) is an open source software for decoding P25, C10e, DMR, DMRC, P25 Phase 1 and P25 Phase 2 digital. Hi John, You are a masterful teacher. Is the OP25 project dead? File /usr/lib/python2.7/dist-packages/gnuradio/gr/hier_block2.py, line 92, in __getattr__ I did skip some cause I wanted to get the the bottom and Im going to go back up and read more. Ive set 853.0625 some of the setting produce the rolling oooooooo, GQRX work fine and I can hear control channel. File ./rx.py, line 207, in __init__ #1. CC and VC signal sources and CC DSD+ and VC DSD+ instances running - CC side can be any P25 control channel signal source feeding CC DSD+ (tapped scanner, RTL dongle, Airspy, etc., FMP24, FMPA, SDR#, etc.) This is (This needs to be your trunk system .tsv and not your TG name/alias .tsv.) Version 1.0 (c) Copyright 2009 Im going to demonstrate using my home town of New Bern NC. Something cool that might benefit others is, if youre lazy like me, set an alias for op25.sh. After newbern.tsv is created (I used exactly what you used), then I inputted the line ./rx.py args rtl -N LNA:47 -S 2500000 -x 2 -f 769.80625 17e3 -T trunk.tsv -V -2 -U 2> stderr-stream0.2, it goes right to a command prompt. The TG will no longer be stopped on during your current session. For reference: ah, OK. Ill give that a go then. Yes, putting the RTL-SDRs on the exact frequency of the control channel and the voice channels really does help. There is no option to see what TGs youve locked out and unlock them. Thank You!!!!!!!!!!!!!!!!!!!!!! I also plugged in a USB audio card into the PI and its all work. Oct 6, 2020. RTL-SDR And now when there is a transmission on the Control Channel, OP25 will track it to the correct frequency and even display the talk group that is currently active. Check your path for accuracy. When finished, your VMWare launcher should look something like this: To use an AirSpy, theres a line of code that must be entered into a file on your Windows 10 C:\ drive (this is not needed for RTL-SDR dongles). P25 Phase II SDRTrunk P25 Phase II testing OP25 is a Linux based P25 digital voice decoder which works with RTL-SDR dongles. WebPhase 2: 2-slot TDMA in 12.5 kHz channel Provides two 6.25 kHz-equivalent channels Defined in TIA-102.AABB but not part of the P25 CAI Allows trunked radio control channels to be transmitted on P25- dsd Digital Signal Decoder (Open source software with modifications)::::: nc dsd P25 Conventional (multiple frequencies) P25 Trunking Phase 1, Phase 2 and TDMA Control Channel. Values range from 1-11. Software like SDRTrunk and DSDPlus can decode P25 Phase 1, but at the moment the Update: OP25 has been enhanced to support Smartzone systems as of July 2020. Follow the directions here if you need to. Do a Save As and name the file newbern.tsv (remember that field in the other file you named newbern.tsv). File ./rx.py, line 323, in __build_graph The WiNRADiO NSW RFS PMR (non GRN): P25 phase Using a 7 element 900 MHz Yagi with 50 of 20 year old 9913. I obviously do not need to tune to ALL of these TGs. Those .tsv files need to be all lowercase. Im kind of working on the assumption that you have Linux installed and have your SDR device working. [R82XX] PLL not locked! It saved me days of work. The frequencies can easily be received with an RTL-SDR, but a decoder is required to be able to actually listen to the voice. p25 I am confused about control freq and talk groups for LARGE systems. In my case it is 0xfc Were going to need that. P25; P25 Phase 2; DMR (MOTOTRBO) NXDN TETRA; dPMR; Positive Train Control; Key Technical Specifications.