DMR Tier 1 Vs Tier 2

JASII

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Joined
Apr 29, 2006
Messages
2,351
I have been reading some things online about DMR Tier 1 Vs Tier 2. I also know that there are smartphones, like the UleFone Armor 3WT, that have a UHF transceiver in them that appears to by DMR Tier 1.

What can you do with a Tier 1 device, since amateur radio is Tier 2? Can a Tier 1 device communicate on simplex with a Tier 2 device? Could a Tier 1 device be used to access an amateur radio hotspot? How will a Tier 1 device behave if an amateur radio repeater frequency, color code and talkgroup were programmed into it? Since there is no provision to select Time Slot 1 or 2, will it simply hear nothing? What if both time slots were active?
 

Golay

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Joined
Apr 28, 2016
Messages
357
Location
Nankin Township, Michigan
A Tier 1 device will be heard on both time slots.
I don't believe it matters what the time slot (you may not be able to program a time slot in a Tier 1 radio) and color code is, it would still come across both time slots. I could be wrong of course.
 

KG7PBS

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Joined
Mar 19, 2015
Messages
254
Location
Reno NV
No Tier 1 is FDMA. Tier 2 is TDMA.
So basically one uses the entire frequency. It’s still transmit data and data slots. But only one conversation at a time on tier 1.
where as tier 2 is TDMA Time division multiple access The radios talk with each other and sync. So you can use timeslot one and time slot to have simultaneous conversations on one frequency. So look at it this way tier 1 is Simplex. tier 2 is simplex but two people can talk at the same time
 
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