... DMR, if its on public safety freqs, will be transmitting in NFM if they followed the FCC mandate.
Actually if using DMR the transmitting radio occupies a 12.5KHz channel, it does not transmit NFM.
DMR is a cheaper alternative to P25...
Cheaper yes, and has similar features. Subscribers are less than half the price, infrastructure is significantly cheaper as well.
...but it doesn't allow for interop...
You are gonna have to explain is. How is using analogue NFM not interop.
Interoperability is NOT a technology, it is a state of mind. People have to WANT to talk to each other, the infrastructure is only the conduit.
If the county of Big Sky(made up place) has a county wide DMR trunk system, that ALL police, sheriff, fire, ems, dpw, emo, peace officers are on, with common talk groups in all radios every one can talk to each other. THAT is interoperability. Throw in band specific analogue NFM. Interop frequencies and they can talk to other that are not users on their system.
EVERY DMR radio I have looked(except the SL-7550, which is targeted at the hospitality industry) at WILL operate in simple analogue FM.
No matter what the flavour of subscribers be it P25, NXDN, or Opensky, they all can be used conventional analogue, That IS interop. All digital technology does is make interop more difficult, not easier. And for people on different bands, gateways solve that problem.
...DMR does allow more talkpaths and such, but both have there pro and cons. DMR is intended for commercial use i.e casinos, schools, business, etc.
Motorola has targeted DMR at public safety, they bill it as a less expensive option to P25.
Having used DMR in an industrial setting I am impressed with its performance, and audio quality. It works well, when the system is engineered correctly, by competent technicians. The company that has the system I use, wentto a UHF MotoTRBO trunk system from conventional VHF analogue. Having used both, I actually like the TRBO better simply because the audio is not all over the place, and the volume has, more or less, become a set and forget, unlike the VHF system that I was constantly adjusting.
Thanks to some slick marketing by certain large P 25 infrastructure providers, people have started to believe 'if it ain't P25 it is not interop' and nothing is farther from the truth.
The fact that a scanner can not listen has no bearing on how I feel about the technology. I simply want a system that works.
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