So recently heard on the air was a discussion about working DMR systems from an airplane; During that talk, there was a claim the repeater was able to be worked with a full bi-directional conversation from a couple hundred miles away.
I was really surprised. I’m fairly sure reception is possible over tremendous distances, but you would be unable to hold the proper time-slot with a TDMA network like Tera and DMR.
Here’s a discussion I found online: http://forum.motorola-radio-support.co.uk/index.php?topic=1035.0 And here’s an FAQ from Tait: http://blog.taitradio.com/2013/09/26/dmr-digital-mobile-radio-frequently-asked-questions/ and: http://owenduffy.net/blog/?p=9133 and: http://www.va3xpr.net/search-range-limit-dmr/
I thought I’d toss this out there to see what others may know or think about this?
I wondered if maybe its possible but you risk stomping on the other time-slot had there been two time-slots in use towards the repeater?
I’m quite certain that with DMO mode aka a Simplex radio connection where there is no need for syncing or precise timing, there would be no problem. This impacts only repeater operation where both time-slots are in use.
For anyone wanting to claim D-Star and Fusion are better than DMR, this might be one example of where they may be. But I’m happy with DMR and it’s ability to carry two conversations from one pair and it’s lower power consumption. The world is full of trade offs.