In the Tucson area, I'm seeing a lot of signals in the 170-MHz band that don't map to any known RRDB systems, nor do they map to any FCC licensees for the area.
On 171.3875 MHz there's a MotoTRBO DMR Data Revert Channel that's broadcasting ARS and LRRP/GPS packets. The GPS tracks are decoding to the top of Mt Hoskins. It looks like there's an observatory on top of that mountain, but there's also the chance that these are mining vehicles.
Several of the other bursting signals look like 2FSK signals with the tell-tale bat ears, that I can't decode with sdrtrunk.
Does anyone know who might be using the MotoTRBO system in this frequency range?
Denny
On 171.3875 MHz there's a MotoTRBO DMR Data Revert Channel that's broadcasting ARS and LRRP/GPS packets. The GPS tracks are decoding to the top of Mt Hoskins. It looks like there's an observatory on top of that mountain, but there's also the chance that these are mining vehicles.
Several of the other bursting signals look like 2FSK signals with the tell-tale bat ears, that I can't decode with sdrtrunk.
Does anyone know who might be using the MotoTRBO system in this frequency range?
Denny
