My little research
Smh
General Information
MOTOTRBO is a Motorola digital radio product marketed primarily to business/industrial users. The format is based on, and compatible with the European 2-slot DMR standard and uses Time Division Multiple Access (TDMA) to effectively accommodate two simultaneous users. A single 12.5 kHz channel is able to carry two simultaneous and independent conversations, or simultaneous and independent voice and data paths each with 6.25 kHz equivalency, however the bandwidth of DMR exceedes the maximum required for UHF 6.25 kHz channel centers. Operation of different talkgroups and talkpaths similar to trunking is possible, as is wide-area operation through IP connectivity. MOTOTRBO transceivers and repeater stations may be retrocompatible with analog FM using CTCSS or CDCSS.
Emission designators for MOTOTRBO: 7K60FXE (voice), 7K60FXD (data).
MOTOTRBO is based on the following ETSI standards:
ETSI TS 102 361-1 Air interface
ETSI TS 102 361-2 Voice and generic services and facilities
ETSI TS 102 361-3 Data protocol
ETSI TS 102 361-4 Trunking protocol
Additional information on DMR is available through the Digital Mobile Radio Association.
Monitoring TRBO
No scanner can monitor this digital format by itself but it can be monitored with DSD. Other decoding efforts have been started, such as Ian Wraith's DMRDecode. DMRDecode is unable to decode audio.
DMRDecode is compatible with some SDRs via piping (sending audio thru utilities such as Virtual Audio Cable) including the RTL-SDR.
DMR Decoding Forum Discussion
While decoding
CACH is Common Announcement Channel
TACT is TDMA Access Channel Type
LC is Link Control
EMB is Embedded signalling field
CSBK is Control Signalling Block
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