Dual Capacity Direct Mode/CC15

[adampearson84]

I'm a bench tech at a Moto shop and I'm trying to match programming from a Kenwood NX-1300NU to a Moto radio so they can talk to an existing fleet. I grabbed frequencies, talkgroup ID, color code, and still couldn't get the Kenwood to talk to my Mototrbo R7- light comes on of course, but doesn't open up. Then I noticed that Dual Capacity Direct Mode is on in the Kenwood on every channel (even the repeaters?) The issue is that they also have the color code set to 15; Moto CPS won't even let me match that, it is reserved for something else when using DCDM, or something like that - so the only valid choice while having DCDM on for a color code is 0 through 14. Does that make the programming essentially unmatchable, since Kenwood seems to have no problem with that? I've been thumbing through codeplugs for a while now and I've never even had any need to mess with DCDM. I can provide more info if I know what is pertinent.

 

[03msc]

Dual Mode seems to be defaulted on in Kenwood software (D1N, D3N, etc.). Has caused issues for several people, including myself, who don't catch to uncheck that box in the software at first.

 

[kd4efm]

If the moto is not using DSDM, then unchecked it on the kenwoods.

Haven't seen the dsdm on M not use 15. What's the help file say?

 

[adampearson84]

DJ0WH's blog put it most simply: "On simplex channels which employ DCDM, colour code 15 is reserved for inter-radio synchronization signaling - so only 0 to 14 may be used on systems that use this feature." At least on Moto side this is reserved to determine the timing leader, is what that sounds like to me. I thought someone might know what the matching quirk is on the Kenwood side. Having to retouch their whole Kenwood fleet, I don't even know if that's something on the table.

 

[wd8chl]

Yeah, I've run into that too. Motorola doesn't support CC 15 with dual slot direct mode, or their version of it. No, it doesn't seem like there's a fix for it. There's a lot of things in DMR that Motorola doesn't implement very well, and it causes problems.
In the case I had, I just had to tell the customer that that channel on their radios won't work because of the way Motorola implemented that feature. It was only one of 16 channels in the radios, and that was the only one that didn't work. (Part of the problem is they had us program the radios without having one of their motorolas in hand to test at first.)
Like was said, if Moto isn;t using it, turn it off on the Kenwoods.