The tutorial assumes that you have Ubuntu 18.04 already installed, and then starts from downloading and installing OP25. Over on John's Tech Blog, John has uploaded a very helpful step by step tutorial that should help with those trying to get OP25 to work. However, OP25 has a reputation of being fairly difficult to set up as it does not have a simple to use GUI, and requires Linux. Software like SDRTrunk and DSDPlus can decode P25 Phase 1, but at the moment the only software that is capable of decoding P25 Phase 1 AND 2 is a program called OP25. The frequencies can easily be received with an RTL-SDR, but a decoder is required to be able to actually listen to the voice. Most police departments is the USA have now upgraded or are in the process of upgrading their radio systems to P25 Phase 2 digital radio. JTutorial on Setting up OP25 for P25 Phase 2 Digital Voice Decoding ExtIO with Decimation & Tuner Bandwidth Controls.Manual gain controls and decimation driver.Measuring Traffic Volumes with Passive Radar.SignalsEverywhere Direction Finding Tutorial.Measuring Filter Characteristics & VSWR.Performing Replay Attacks with RTL-SDR and RpiTX.
QRP (FT8, JT9, WSPR etc) Monitoring Station.Decoding 433 MHz ISM Band Weather Stations.GOES 16/17 and GK-2A Weather Satellite Tutorial.
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