Chicago Area Radi-Link Cap+ System

[Premises2972]

Hello,
Earlier today I picked up a strong DMR trunked signal on 452.3625 (Appears under this license FCC Callsign WQBH487 (RADI LINK INC)) for a Willis Tower repeater. It is CC:1 and there was an encrypted talkgroup (101). I am confused which system this belongs to. There are 2 on RadioReference (Radi-Link (Capacity Plus) Trunking System, Chicago, Illinois and Radi-Link (Capacity Plus Multi Site) Trunking System, Chicago, Illinois) I know this is Cap+, and my SDR tells me there are possibly 16 LSNs. Are these 2 systems the same? If yes, I think the one-site system should be removed. Since either one of these systems is missing a frequency, anyone have any clues as to what this is?
Thanks

 

[kevino]

Hello,
Earlier today I picked up a strong DMR trunked signal on 452.3625 (Appears under this license FCC Callsign WQBH487 (RADI LINK INC)) for a Willis Tower repeater. It is CC:1 and there was an encrypted talkgroup (101). I am confused which system this belongs to. There are 2 on RadioReference (Radi-Link (Capacity Plus) Trunking System, Chicago, Illinois and Radi-Link (Capacity Plus Multi Site) Trunking System, Chicago, Illinois) I know this is Cap+, and my SDR tells me there are possibly 16 LSNs. Are these 2 systems the same? If yes, I think the one-site system should be removed. Since either one of these systems is missing a frequency, anyone have any clues as to what this is?
Thanks

Have you been able to tell which LCN (or LSNs) are are assigned to this 452.3625 repeater? Have you caught any talkgroups active on that repeater other than encrypted talkgroup 101?

 

[kbk777]

@Premises2972
The Willis Tower Radi-Link site has 452.3825 (LCN2), not 452.3625. I can share DSD frequencies data if you need it. That said, even though 452.3625 is listed under the FCC license, it does not appear to be in use in that system. I'll do some more research and report back.

 

[Premises2972]

Have you been able to tell which LCN (or LSNs) are are assigned to this 452.3625 repeater? Have you caught any talkgroups active on that repeater other than encrypted talkgroup 101?

So after listening for basically one whole business day, here is what I see
This frequency appears to be LSNs 1-2, and it doesn't look like there are any other frequencies on this Cap+ system (I only see REST:1 and REST:2 on this which means that there is one frequency only-- I could be wrong). No other talkgroups besides 101 observed. 101 is ENC. My SDR does say MOTOROLA CAP+ WIDE-AREA VOICE CHANNEL, so im not sure if that means Capacity Plus Multi Site, This frequency is CC:1, i was hoping someone with a good digital scanner could pop this into their scanlists and give some info, so maybe we can add this as a frequency to an existing TRS or add a new TRS.

 

[Premises2972]

@Premises2972
The Willis Tower Radi-Link site has 452.3825 (LCN2), not 452.3625. I can share DSD frequencies data if you need it. That said, even though 452.3625 is listed under the FCC license, it does not appear to be in use in that system. I'll do some more research and report back.

I'm leaning toward this being a single frequency CAP+ system on the Willis Tower, see my other reply for other details after listening for a bit longer

 

[kevino]

@Premises2972
The Willis Tower Radi-Link site has 452.3825 (LCN2), not 452.3625. I can share DSD frequencies data if you need it. That said, even though 452.3625 is listed under the FCC license, it does not appear to be in use in that system. I'll do some more research and report back.

452.3875, not 452.3825.

 

[kevino]

So after listening for basically one whole business day, here is what I see
This frequency appears to be LSNs 1-2, and it doesn't look like there are any other frequencies on this Cap+ system (I only see REST:1 and REST:2 on this which means that there is one frequency only-- I could be wrong). No other talkgroups besides 101 observed. 101 is ENC. My SDR does say MOTOROLA CAP+ WIDE-AREA VOICE CHANNEL, so im not sure if that means Capacity Plus Multi Site, This frequency is CC:1, i was hoping someone with a good digital scanner could pop this into their scanlists and give some info, so maybe we can add this as a frequency to an existing TRS or add a new TRS.

Been listening to 452.3625 for fifteen minutes on my SDS100. I'm at Columbus Drive and the Chicago River in downtown Chicago and haven't heard a peep. No DMR rest channel bursts, nothing. Maybe the transmitter you're hearing isn't in downtown Chicago? Any chance you've caught an analog CWID?

 

[Premises2972]

Been listening to 452.3625 for fifteen minutes on my SDS100. I'm at Columbus Drive and the Chicago River in downtown Chicago and haven't heard a peep. No DMR rest channel bursts, nothing. Maybe the transmitter you're hearing isn't in downtown Chicago? Any chance you've caught an analog CWID?

Wow thats interesting, I assumed it was willis tower since that was the only license that would make sense. I am on the north side, and I can hear the REST bursts

 

[Premises2972]

Ok so upon some searching, looks like I might be hearing a system from Niles IL, under FCC License WRNA375 (FCC Callsign WRNA375 (Shure Inc)) for SHURE INC. There is another license for Google at Fulton/Morgan but that seems unlikely to be this one. Can anyone confirm if Shure Inc in Niles uses a Cap+ system?

 

[kbk777]

I'm leaning toward this being a single frequency CAP+ system on the Willis Tower, see my other reply for other details after listening for a bit longer

Ok so upon some searching, looks like I might be hearing a system from Niles IL, under FCC License WRNA375 (FCC Callsign WRNA375 (Shure Inc)) for SHURE INC. There is another license for Google at Fulton/Morgan but that seems unlikely to be this one. Can anyone confirm if Shure Inc in Niles uses a Cap+ system?

@Premises2972 ... where approximately are you located and scanning from?

 

[Premises2972]

@Premises2972 ... where approximately are you located and scanning from?

I'm by the north side of the city

 

[kbk777]

I'm about 10 miles north of Niles and hear nothing on 452.3625.

 

[Premises2972]

I'm about 10 miles north of Niles and hear nothing on 452.3625.

ok so now im confused.... someone downtown saying they hear nothing, and now youre saying you hear nothing north of niles.... So now I have no idea what the heck i'm seeing.... and what this freq belongs to

 

[ChicagoRadio736]

ko

ok so now im confused.... someone downtown saying they hear nothing, and now youre saying you hear nothing north of niles.... So now I have no idea what the heck i'm seeing.... and what this freq belongs to

I'm in Bensenville just West of Ohare Airport and I'm definitely getting digital noise on that frequency in search mode.

 

[kbk777]

I readjusted my antenna and now see activity on 452.3625. Shows system ID of 334 with multiple neighbor sites. I will investigate this further.

 

[Premises2972]

I readjusted my antenna and now see activity on 452.3625. Shows system ID of 334 with multiple neighbor sites. I will investigate this further.

View attachment 161593

OK this adds to the confusion, i never got anything about a Connect Plus multi site system. I have attached a snippet of my SDRTrunk logs, there is more but its too big and is mostly repeated of this.

 

[kevino]

I readjusted my antenna and now see activity on 452.3625. Shows system ID of 334 with multiple neighbor sites. I will investigate this further.

View attachment 161593

Showing CC15 - appears to be a different system that what was originally reported (CC1).....

 

[kevino]

I readjusted my antenna and now see activity on 452.3625. Shows system ID of 334 with multiple neighbor sites. I will investigate this further.

View attachment 161593

Looks like Site 1 (Grand Rapids, MI) of this system.

 

[kbk777]

Looks like Site 1 (Grand Rapids, MI) of this system.

Yep that's the one. Atmospheric conditions have been outstanding these last few days. I am receiving the Lake County Indiana Public Safety system now. Kinda cool!