Is this encryption or frequency hopping or just not FM modulation? Not law enforcement, just a school they use Motorola handhelds.

This page summarizes the projects mentioned and recommended in the original post on /r/RTLSDR
dsd Sdr C Receiver C++

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  • dsd

    Digital Speech Decoder

    • You can decode DMR with DSD. It will work with either an SDR or a radio with a discriminator output. If you are using an SDR, then SDRangel is easy to use for DMR because it has a DSD plugin.

  • sdrtrunk

    A cross-platform java application for decoding, monitoring, recording and streaming trunked mobile and related radio protocols using Software Defined Radios (SDR). Website:

    • If it's P25 Phase I or Phase II then SDRTrunk might work. boatbod's op25 might be another option, but more complicated to set up.

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  • op25

    Fork of osmocom OP25 by boatbod

    • If it's P25 Phase I or Phase II then SDRTrunk might work. boatbod's op25 might be another option, but more complicated to set up.

  • sdrangel

    SDR Rx/Tx software for Airspy, Airspy HF+, BladeRF, HackRF, LimeSDR, PlutoSDR, RTL-SDR, SDRplay RSP1 and FunCube

    • You can decode DMR with DSD. It will work with either an SDR or a radio with a discriminator output. If you are using an SDR, then SDRangel is easy to use for DMR because it has a DSD plugin.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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