DMR slots and color codes

[Napalm]

Quick question on DMR. Can you assign a color code per time slot? Or is the cc tied to the channel?

Follow-up question: can the SDS differentiate in any way if that's the case?

 

[tvengr]

Color codes can only be assigned to a frequency.

 

[StoliRaz]

Understanding DMR (Digital Mobile Radio)

Digital Mobile Radio or DMR for short is an open standard or protocol for digital mobile radios defined by the European Telecommunications Standards Institute (ETSI) and are used in commercial products around the world. DMR was designed to allow for more bandwidth on a particular frequency. Or...

whistlergroup.com

"DMR is a TDMA mode (Time Division Multiple Access) which means that it allows several users to share the same frequency channel by dividing that signal into different time slots."

Since color codes are assigned to a frequency, each site has the same color code on all of it's frequencies, and time slots are pretty much a division of the same frequency, I would presume it wouldn't work.

 

[mmckenna]

Quick question on DMR. Can you assign a color code per time slot? Or is the cc tied to the channel?

Depends on exactly what kind of "system" it is.

Repeaters? Yes, as said above, color code is tied to that frequency.

Simplex? I have different color codes assigned to different timeslots on simplex DMR setups.

 

[tvengr]

Simplex? I have different color codes assigned to different timeslots on simplex DMR setups.

Is that possible with a scanner? I could see using the same frequency several times in different OFT systems.

 

[mmckenna]

Is that possible with a scanner? I could see using the same frequency several times in different OFT systems.

I don't know about a scanner, but I've got a bunch of Kenwood NX-1300's doing this at work.

 

[tvengr]

I don't know about a scanner, but I've got a bunch of Kenwood NX-1300's doing this at work.

Thanks!

 

[Napalm]

Depends on exactly what kind of "system" it is.

Repeaters? Yes, as said above, color code is tied to that frequency.

Simplex? I have different color codes assigned to different timeslots on simplex DMR setups.

Thanks! Good to know. This is a repeater (actually about 7 of them) at an Amazon Fulfilment center and I was just trying to get all the info.

I can't find a trunked control channel I think they're just "simple" DMR repeaters.

 

[tvengr]

What city is the fulfillment center?

 

[tvengr]

If you are able to receive the frequencies, set up the 7 frequencies as conventional, audio type Digital Only, and digital code option Search. Once you have the color codes, set up OFT (One Frequency Trunk) systems with the frequency and the color code and set systems to ID Search to find TGID's.

 

[W1KNE]

Thanks! Good to know. This is a repeater (actually about 7 of them) at an Amazon Fulfilment center and I was just trying to get all the info.

I can't find a trunked control channel I think they're just "simple" DMR repeaters.

The Amazon fulfillment centers (the large ones) are just simple 8 frequency, 16 "channel" conventional repeaters.
Unfortunately a couple got entered as trunking systems here in the DB, but after hearing multiples of them, I know they aren't trunked.

They run a configuration that starts with TG 6100 CC xx TS 1 up to TG 7600 CC xx TS2. 6100 is Channel 1, through 7600 which is channel 16.
Each odd TG is TS 1, even is TS2. 6100/6200 is one color code, 6300/6400 is the next color code.

You can see how I mapped out the Fall River (MA) fulfillment center that is in radio range of my house.

Subcategory: Miscellaneous/Amazon Fulfillment Center (Fall River) (Businesses)

Subcategory: Miscellaneous/Amazon Fulfillment Center (Fall River) Details (Businesses)

www.radioreference.com

 

[W1KNE]

If you are able to receive the frequencies, set up the 7 frequencies as conventional, audio type Digital Only, and digital code option Search. Once you have the color codes, set up OFT (One Frequency Trunk) systems with the frequency and the color code and set systems to ID Search to find TGID's.

You don't need to go that complicated to identify the TGs. You can get the TGID on a x36 conventionally by using the default name field (front panel) or blank (Sentinel). I do this all the time and it works well.

He has a SDS100, he can just set one of the custom fields on the display settings to show TGID, and tune it in manually or program it conventionally, and it'll show.