New DMR

[scottiantomlinson]

Hello,

Need some help. I am trying to figure out a local system that is on DMR. I have frequencies from FCC license. I have them programmed into my scanner and left the type as digital search. I am now picking up some voice but the scanner keeps stopping with no transmission heard and blinking the color code and CAP +. How do I get it to stop holding on dead air and only stop when voice is being transmitted? Is it doing this because its a trunked system? Each FCC license has about 30 frequencies associated with it. Call signs are WSCK218 and KD53486. Trying to pick up my kid's schools. I am using proscan. THANK YOU!

 

[RaleighGuy]

How do I get it to stop holding on dead air and only stop when voice is being transmitted? Is it doing this because its a trunked system? Each FCC license has about 30 frequencies associated with it. Call signs are WSCK218 and KD53486. Trying to pick up my kid's schools. I am using proscan. THANK YOU!

Most likely it is not dead air, but digital data being sent from the system. I'm assuming you have the DMR upgrade. Do you have it programmed as a CAP+ trunked system? Do you have the proper LCNs for each frequency? Keep in mind, FCC data doesn't have everything (LCN, TGID, colr code,etc) you need to program it.

 

[scottiantomlinson]

I do have the DMR upgrade. I do not have it programed as a CAP+ trunked system. I do not have LCNs. I have only been able to discover the color code on select frequencies.

Currently in as a conventional system with 30 freq or so. Keeps holding on a select few frequencies. In data logging it states the digital type is CAP. Does that indicate its trunked?

 

[scottiantomlinson]

Hello,

Need some help. I am trying to figure out a local system that is on DMR. I have frequencies from FCC license. I have them programmed into my scanner as conventional and left the type as digital search. I am now picking up some voice but the scanner keeps stopping with no transmission heard and blinking the color code and CAP +. How do I get it to stop holding on dead air and only stop when voice is being transmitted? Is it doing this because its a trunked system? Each FCC license has about 30 frequencies associated with it. Call signs are WSCK218 and KD53486. Trying to pick up my kid's schools. I am using proscan. Data logging shows the digital type is CAP. THANK YOU!

 

[RaleighGuy]

I do have the DMR upgrade. I do not have it programed as a CAP+ trunked system. I do not have LCNs. I have only been able to discover the color code on select frequencies.

Currently in as a conventional system with 30 freq or so. Keeps holding on a select few frequencies. In data logging it states the digital type is CAP. Does that indicate its trunked?

Yes it does.

 

[scottiantomlinson]

Should I program as motoTRBO and list all 30 freq and then discover LCN and IDs?

 

[KC1UA]

Where in MA are you located? We may have specific info at Scan New England, although most of that data should be available here as well.

 

[scottiantomlinson]

Chelmsford, doesn't come up under Scan New England. The DMR system is new, I used to hear some channels without it

 

[KC1UA]

Chelmsford, doesn't come up under Scan New England. The DMR system is new, I used to hear some channels without it

I'm inclined to doubt that unless it is a brand new system that has suddenly come online. However, how about a list of the frequencies you're observing in use? That should help to narrow it down.

 

[RaleighGuy]

I'm inclined to doubt that unless it is a brand new system that has suddenly come online. However, how about a list of the frequencies you're observing in use? That should help to narrow it down.

FCC Callsign WSCK218 (Chelmsford Public Schools)

FCC Callsign WSCK218 (Chelmsford Public Schools)

www.radioreference.com

FCC Callsign KD53486 (MC CARTHY MIDDLE SCHOOL)

FCC Callsign KD53486 (MC CARTHY MIDDLE SCHOOL)

www.radioreference.com

 

[KC1UA]

Thanks for that. I stand corrected. I'll have to get our Middlesex County area folks on this one. Usually not much slips through the cracks, thus my ASSumption!

Scott, do you by chance have any SDR capability? I'm guessing not or you'd likely have already tried, but sometimes DSD+ software can make it easier to piece new systems together.

 

[Firebuff66]

Chelmsford, doesn't come up under Scan New England. The DMR system is new, I used to hear some channels without it

Hi Scott!

 

[scottiantomlinson]

Yes it does.

Thanks!

 

[scottiantomlinson]

Thanks for that. I stand corrected. I'll have to get our Middlesex County area folks on this one. Usually not much slips through the cracks, thus my ASSumption!

Scott, do you by chance have any SDR capability? I'm guessing not or you'd likely have already tried, but sometimes DSD+ software can make it easier to piece new systems together.

Thank you all, this has been helpful. No SDR here. I will focus on the FB2 freq and make a site for each callsign. I'll see what I can figure out with the discovery and analyze modes on my scanner. Again appreciate all the words of advise!

 

[scottiantomlinson]

Hi Scott!

Hi Jon!

 

[EricCottrell]

You have to break the system down. If it is Cap+ then it appears to be multiple sites that might be linked together. There maybe both trunked and conventional sites. Only repeaters at one site can be trunked together. The power is low so I doubt you will hear the repeaters very far away from the school. I would look at the repeaters first.

Class FB2 is a repeater and the reason for the two entries are 7K60FXD is DMR Data and 7K60FXE is DMR Voice. Talkaround is when you transmit on the output of a repeater (usually if the repeater goes down) or outside a trunked system.

WSCK218
Center Elementary School 84 Billerica Rd
Repeaters on 462.2500 and 464.1125
The other frequencies listed for location 2 are for the mobile (handheld) to transmit either talkaround or via the repeater.
Additional direct frequencies (location 9): 452.7250, 452.8500, 456.7625, and 457.0375

Harrington Elementary School/120 Richardson Road
Repeaters on 461.6625 and 463.4875
The other frequencies listed for location 4 are for the mobile (handheld) to transmit either talkaround or via the repeater.
Additional direct frequencies (location 10): 452.0375, 452.8125, 456.7625, 457.0375, and 457.8125

South Row School 250 Boston Rd
Repeaters on 463.5375 and 464.4375
The other frequencies listed for location 6 are for the mobile (handheld) to transmit either talkaround or via the repeater.
Additional direct frequencies (location 11): 452.0375, 452.2250, 452.6375, 457.0375, and 457.6375

Chelmsford Community Education 170 Dalton Rd
Repeaters on 461.3000 and 463.6375
The other frequencies listed for location 8 are for the mobile (handheld) to transmit either talkaround or via the repeater.
Additional direct frequencies (location 12): 452.0375, 452.8500, 456.7625, 457.0375, and 457.8500


KD53486 looks like the original license that got partially upgraded to DMR. I am only going to list the repeaters for this license.

McCarthy Middle School 250 North Road
Original? Analog Repeater on 464.3375
DMR Repeaters on 461.6375 and 462.0375

Chelmsford High School 200 Richardson Rd
DMR Repeaters on 463.4375 and 464.9625

Chelmsford Public Schools Administration Offices 230 North Rd
DMR Repeaters on 461.5875 and 463.3375

Parker Middle School 75 Graniteville Rd
DMR Repeaters on 461.6875 and 463.7875

Byam Elementary School 25 Maple Rd
DMR Repeaters on 462.4000 and 464.4125