LMRN Technical Data Discussion

ATCTech

Active Member
Joined
Aug 13, 2002
Messages
1,857
142.665 now active with the 1038 Hz test tone in P25 mode. Britannia tower perhaps? Too strong here to be very far away from my QTH.
 

Jradioptbo

Member
Joined
Jan 16, 2021
Messages
94
Location
Peterborough, Ontario
Visiting family for Thanksgiving. Passed through Ingersoll. Picking up BEAT repeater 772.13125
I also hear what appears to be a beep, like a beacon every so often. The range of the repeater seems comparable to the old UHF repeaters.
 

ATCTech

Active Member
Joined
Aug 13, 2002
Messages
1,857
142.635? Normal FleetNet (matter of fact analog EMS) traffic here, otherwise no other signal on that frequency from my QTH north of Hamilton.
 

icarus1963

Member
Premium Subscriber
Joined
Dec 13, 2009
Messages
195
Location
Brantford, Ontario
142.635? Normal FleetNet (matter of fact analog EMS) traffic here, otherwise no other signal on that frequency from my QTH north of Hamilton.
Sorry for jumping the gun. Even with my gain set low, I'm getting blasted by interference today. The local LMRN signal if very strong from my location, and will often overload my SDR. Using my scanner instead of the SDR I too am just getting a lot of analogue EMS traffic.
 

ATCTech

Active Member
Joined
Aug 13, 2002
Messages
1,857
No worries at all, I thought maybe you'd unintentionally transposed 142.635 from the "stray" 143.625 P25 test tone signal I posted a few weeks back. It's still active.
 

mikewazowski

Forums Manager/Global DB Admin
Staff member
Forums Manager
Joined
Jun 26, 2001
Messages
13,730
Location
Oot and Aboot
Visiting family for Thanksgiving. Passed through Ingersoll. Picking up BEAT repeater 772.13125
I also hear what appears to be a beep, like a beacon every so often. The range of the repeater seems comparable to the old UHF repeaters.

If you monitor using DSDPlus, you'll see that the beacons are P25 packets between the DVRS in the car and the portable.
 

IdleMonitor

Member
Premium Subscriber
Joined
Feb 17, 2005
Messages
3,215
Location
The Ottawa Valley - Eastern Ontario
Is this a BEAT Repeater? or a mobile repeater? Further up this thread, 772.13125 was identified as a mobile repeater. Also, as Mike pointed out, the beacons are per mobile repeaters so...

Visiting family for Thanksgiving. Passed through Ingersoll. Picking up BEAT repeater 772.13125
I also hear what appears to be a beep, like a beacon every so often. The range of the repeater seems comparable to the old UHF repeaters.
 

Jradioptbo

Member
Joined
Jan 16, 2021
Messages
94
Location
Peterborough, Ontario
772.13125 was also a BEAT repeater in Alliston. I am not sure if the frequency is an allocation to BEAT or Mobile. But I indeed did get that on my scanner in Ingersoll. Also is the beacon P25 packet specific to only Mobile Repeater to portables and/or BEAT Repeaters to portables? These packets were intermittent during the transmission. Ingersoll did have an old UHF repeater before the switch over to 700MHz
 

mciupa

Canadian DB Admin
Moderator
Joined
Nov 5, 2002
Messages
8,551
Location
I'm here a lot
My uneducated guess is that the Mobile Repeater PL tone would be static and not vary. Alliston and Ingersoll have different PL's for their locations.
 

ATCTech

Active Member
Joined
Aug 13, 2002
Messages
1,857
I'm now seeing this on the 142.050 P25 LMRN frequency rather than the typical TG=1 RID=1 associated with the 1038 Hz tone. It's admittedly a very weak RF level for me on that one but is it valid or just garbage I'm decoding?

1665693826355.png
 

gary123

Member
Joined
Sep 11, 2002
Messages
2,459
Have seen 142.110 active out of Tavisock. 143.085 is silent. Will try for a capture to verify very soon.
 

gary123

Member
Joined
Sep 11, 2002
Messages
2,459
I drove by Tavistock and it's not coming from there. There is no CC coming from the site. I did a complete VHF sweep138-174. I will see if I can grab some site info from the 142.110 signal. I did pickup Woodstock on 142.530.
 
Top