OP25 is a Linux based P25 digital voice decoder which works with RTL-SDR dongles. It is capable of decoding both Phase 1 and Phase 2 systems. Installation is fairly simple via an installation script, but it does take some time to install.

Apr 11, 2013 · RTL-SDR: Decoding P25 Phase I QPSK with DSD and SDR# Watch this video on YouTube YouTube user Superphish uses RTL-SDR as a radio scanner to decode MOTOTRBO digital voice of a taxi company, using DSD, SDRSharp and virtual audio cable.

Jul 29, 2020 · However, P25 can unscramble trunked radio calls intercepted by a cheap SDR dongle and let you listen in. [SignalsEverywhere] shows you how to set it up for Windows or Linux and you can see the...

Feb 9, 2024 · The RTL-SDR is an ultra cheap software defined radio based on DVB-T TV tuners with RTL2832U chips. The RTL-SDR can be used as a wide band radio scanner. It may interest ham radio enthusiasts, hardware hackers, tinkerers and anyone interested in RF.

Jan 24, 2025 · With P25 there is extensive voice channel signaling that allows op25 to maintain a view of all calls in progress as well as critical events such as when a voice call has ended.

Jul 17, 2018 · OP25 is a program that decodes P25 Phase 1 and Phase 2 digital radio. 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 …

Jun 7, 2021 · The first thing you need to do is go through the initial setup process - their quick start guide is pretty straightforward and will get you into SDR Sharp and able to pickup FM frequencies: https://www.rtl-sdr.com/rtl-sdr-quick-start-guide/

Dec 30, 2024 · You only need 1 sdr for a conventional p25 system. I run 11 channels on one sdr, of which 6 are p25 channels. The frequency showing in the Tuners tab is the center frequency for the sdr when it is in idle mode.

Dec 12, 2014 · The project that got me really into experimenting with the RTL-SDR dongles is using them to decode P25 digital trunked public service radio systems. I have been a casual scanner listener for years and like to listen to emergency calls nearby.

Jul 22, 2020 · In the video she first shows how to install SDRTrunk in Windows and Linux, then how to install the JMBE codec required for decoding audio. She goes on to show how to import trunked system network data from a (paid) RadioReference subscription, how to blacklist unwanted talkgroups, and how to optimize operation with two RTL-SDR tuners.