United Airlines TRBO Newark

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RadioDitch

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Some LCN Data found:

LCN-1: 935.3875
LCN-2: 935.7250
LCN-3: 936.5000
LCN-9: 937.7125
LCN-10: 938.6500
LCN-11: 938.6875

Odd part? Only 7 frequencies for the simulcast on the license.

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RadioDitch

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Unlisted on the license but also ID-ing as part of the system (SYSID: 396) are:

935.6875
939.1500
939.4750
939.9625

That would make 11, which makes sense. Gonna keep working on it then submit.



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RadioDitch

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So I decided to revive this venture from the beginning. After breakfast at IKEA and a great show of departures from Runway 25L, here's what I have...

System 396
935.3875 - Site 3 - Color 1 - LCN 1
935.6875 - Site 4 - Color 1
935.7250 - Site 3 - Color 1 - LCN 2
936.3875 - Site 4 - Color 1
936.5000 - Site 3 - Color 1 - LCN 3
937.7125 - Site 3 - Color 1 - LCN 9
938.4750 - Site 3 - Color 1 - LCN 4
938.6500 - Site 3 - Color 1 - LCN 10
939.1500 - Site 3 - Color 1 - LCN 11
939.9625 - Site 3 - Color 1 - LCN 6

Site 3 Control Channel is 935.3875

Remains a work in progress.


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RadioDitch

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Damn good work so far, sir!

Thanks. The issue is that they're not conforming to their license. The system is operating with frequencies from three different licenses, and I believe one unlicensed frequency.

I'm free the rest of the weekend, so I think I'm going to grab a book, some food and spend some time at Ikea tomorrow to try and finish it off.

The system works fine programmed with just the known LCN's. But I have a suspicion that the Site 4 frequencies are two of the missing LCN's, and 939.475 is the other.
 

W2SJW

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You're nowhere even close. That's for their operations at Newark Airport, so only the immediate Union/Essex County area...

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RadioDitch

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You're nowhere even close. That's for their operations at Newark Airport, so only the immediate Union/Essex County area...

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I can't hold the control channel from Cranford, and can just do so in Roselle Park. I'd say about a 3-5mi radius.
 

mondaro

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I threw that Untied system here in my radio and did not pick anything up in Harrison, using a decent anennta system with a new BCD 536 with DMR upgrade.
 

RadioDitch

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I threw that Untied system here in my radio and did not pick anything up in Harrison, using a decent anennta system with a new BCD 536 with DMR upgrade.



Hearing it absolutely fine in North Elizabeth right now. But you also have the entire city of Newark in your way.


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RadioDitch

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Talkgroups active today:

3970008
3970010 ETOPS?
3970013
3970014
3970028 Requesting food/ice & Cleaners
3970033
3970036
3970049 Hot move at gate 49
3970050
3970058 Calling disp
3970061
3970064
3970072
3970075
3970079
3970086
3970098
3970099
3970102
3970103
3970104
3970105 Baggage Talk
3970106
3970107

Also did another LCN Search and came up with. Someone knowledgeable with DSD would be able to confirm this.
935.3875 LCN-2
936.5000 LCN-3
938.4750 LCN-4
939.9725 LCN-6
937.7125 LCN-9
938.6500 LCN-10
939.1500 LCN-11
935.7250 LCN-????
 
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RadioDitch

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Been continuing to monitor and haven't seen any new talkgroups. It appears the TG's are laid out the same as at other airports with multiple gates in a "zone" with it's own TG, then hardstand ops, baggage ops, cleaners/catering. Gonna be a huge job to work it out.

If anyone has any additional information to contribute, please do. Also, is there a better method to determine LCN for a TRBO system beyond the Uniden function? Still thinking what I have isn't quite right.
 
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