TRX-1: Scanning a P25 409.4375 band system?

[shajoe44]

I am trying to monitor a system that the control channel is 409.4375. Voice channels and secondary control channels are 406.1500, 408.0375, 408.4250. I am running DSD Plus and my signal and reception is good. That is how I know I am receiving it and the frequencies are correct. I tried setting up a trunk site like my other 800 P25 sites and am not getting anything on the scanner. Even running a search on the voice channels only and still not getting anything. Thanks

 

[RaleighGuy]

I am trying to monitor a system that the control channel is 409.4375. Voice channels and secondary control channels are 406.1500, 408.0375, 408.4250. I am running DSD Plus and my signal and reception is good. That is how I know I am receiving it and the frequencies are correct. I tried setting up a trunk site like my other 800 P25 sites and am not getting anything on the scanner. Even running a search on the voice channels only and still not getting anything. Thanks

Hahahaha, sorry for laughing but it's a repeat of my problem from Saturday night. It sounds as though your band plan is not correct.
Does DSD Plus give you the channel numbers for the freqs? You might want to look at the below page if it is a Type II system.

For P25 systems you can program it into your TRX-1 scanner and select "AUTO FILL" in the trunking table under site options or use Pro96Com with the CC and it will decode for you.

Determining Base/Step/Offset for VHF/UHF Motorola Systems - The RadioReference Wiki

wiki.radioreference.com

 

[shajoe44]

Network: 465EF.00A

Bandplan #0: Base=406.000000 Offset=+0 Spacing=12.5 BW=12.5
Bandplan #8: Base=406.000000 Offset=+0 Spacing=12.5 BW=12.5 Slots=2


Site: 10.10 NAC=00A

Channel 0-12: 406.150000 SCC
Channel 0-163: 408.037500 SCC
Channel 8-326: 408.037500-1 VOICE
Channel 8-327: 408.037500-2 VOICE
Channel 0-194: 408.425000 SCC
Channel 8-388: 408.425000-1 VOICE
Channel 8-389: 408.425000-2 VOICE
Channel 0-275: 409.437500 CC

P25, 465EF.00A, 100, 50, Normal, 529, 2020/04/14 17:08, ""
P25, 465EF.00A, 101, 50, Normal, 3, 2020/04/14 10:20, ""
P25, 465EF.00A, 102, 50, Normal, 0, 0000/00/00 0:00, ""
P25, 465EF.00A, 200, 50, Normal, 0, 0000/00/00 0:00, ""
P25, 465EF.00A, 300, 50, Normal, 37, 2020/04/14 13:24, ""
P25, 465EF.00A, 350, 50, Normal, 372, 2020/04/14 15:20, ""
P25, 465EF.00A, 400, 50, Normal, 75, 2020/04/14 16:59, ""
P25, 465EF.00A, 500, 50, HOLD, 662, 2020/04/14 15:04, ""

 

[RaleighGuy]

Looks like it is P25 Phase II, with the two slots. But system 00A is a 300mhz military system. Have you considered it might be encrypted? What is the encryption setting in your TRX-1 set to, silent or tone?

United States Marine Corps (00A) Trunking System, Various, Multi-State

United States Marine Corps (00A) Trunking System Profile

www.radioreference.com

 

[shajoe44]

There is only 1 encrypted talkgroup and that is 100 rest are good and coming thru on DSD

 

[KevinC]

Looks like it is P25 Phase II, with the two slots. But system 00A is a 300mhz military system. Have you considered it might be encrypted? What is the encryption setting in your TRX-1 set to, silent or tone?

United States Marine Corps (00A) Trunking System, Various, Multi-State

United States Marine Corps (00A) Trunking System Profile

www.radioreference.com

System 00A is many systems...

RR Database Home

The most complete database of radio communications data

www.radioreference.com

You would need to look at the WACN to narrow down the actual user, but unfortunately 465EF isn't listed.

 

[RaleighGuy]

There is only 1 encrypted talkgroup and that is 100 rest are good and coming thru on DSD

I'm not sure then, that was the only thing I thought of.

 

[shajoe44]

That's why I am monitoring it, I was going to post the information after gathering it.