thanks; was digging around the net (what the heck did we do back in the day??? Rely on QST?) and, while I know that the DMR-MARC group has a prohibition against cross-connecting the trbo equipment (indeed, connecting anything other than batwing boxen to their net...after all, it IS the Motorola Amateur Radio Club...) to any analog system if you're on their net, I note that Hytera has app notes to do so with theirs. Yeah, you use some of the flexibility of cross system roaming and messaging, but if the goal is to experiment with a DMR box on a local app-rpt net...don't see the problem...but, then, I know I need to see the optomitrist... -- Bryan There are two hard problems in computer science: cache validation, variable substitution, and off-by-one errors. Sent from my iPad

On Jan 30, 2014, at 2:58 PM, Brett Friermood <brett.friermood@gmail.com> wrote:

My observations: I am not aware of anything for transmit. For receive/decode I am only aware of DSD and a couple data related utilities. For a repeater I think it might be possible to use plain narrowband (12.5 kHz) radios with low level access to the transmitter/receiver due to no timing constraints. However for "subscriber unit" operation a USRP or similar would be needed due to the on/off timing of TDMA.

With the OP25 Project's recent breakthroughs in trunking and CQPSK simulcast reception, I believe some of them are now working on Phase II P25. Given the very similar nature of the two technologies it would seem a spin off of that would be a good starting point for DMR. I would think a similar hook into Asterisk could be used.

I've been gong to send out an email on the OP25 list when I got time with few questions, one being the existence of such a DMR project or work being done toward it. I believe there a couple developers also on this list so maybe they will chime in.

Brett KQ9N

...

On Thu, Jan 30, 2014 at 12:37 PM, Bryan D. Boyle <bdboyle@bdboyle.com> wrote: beginning, with the growing interest in the DMR/trbo usage...to investigate integrating the two technologies. Connect Systems is starting to bring in DMR cable DMR/analog HTs for not a lot more than a wouxun...and, yes, know about the DMR-MARC group. But, my question...is anyone in the band investigating navigating the DMR to Asterisk chasm yet?

PM is probably preferable than broadcast, unless there is interest on the part of the tribe....or I've missed something along the way...

-- Bryan There are two hard problems in computer science: cache validation, variable substitution, and off-by-one errors.

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From RTCM's connected to Quantars: Squelch Noise Gain Value: 34, Diode Cal. Value: 39, SQL pot 310 Squelch Noise Gain Value: 32, Diode Cal. Value: 42, SQL pot 412 -- Tim :wq On Jan 30, 2014, at 5:58 PM, kk6ecm <kk6ecm@gmail.com> wrote:

Question from a friend...

"... when you do an # 98 Status on your RTCM, what is your Squelch Noise Gain Value = ? I was wondering how close mine is to others (Radio=master2 Station)"

What are typical values on an RTCM node?

Thanks, Bob

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