154 MHz DMR Tier 3

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154 MHz DMR Tier 3

Postby Minus1 » Sat Sep 03, 2016 7:45 am

Lots of digital transmissions now appearing in the 154 MHz band around the Midlands.
These are listed as JRC - WTR Licence 1020600.
I've also seen a reference to Western Power Distribution somewhere, but forget where.
You can trawl thru the NGR squares if you want (OFCOM can't be bothered to map them).
12.5 kHz channel width, but using 6.25kHz offset from 12.5kHz offsets (a fad I find tediously annoying)
All DMR Tier 3 - shows as "DT3" on my BCD536HP.
Site numbers show up, but I've not yet located any sites.
e.g. 154.55625 is Site 23.
All Colour Code 0 so far.
The BCD536HP seems to have difficulty reading the data from lower frequency if two frequencies are adjacent.

Not yet heard any audio, nor mobile transmissions.
Network may still be under construction, indicated by the fact that 154.73125 has changed from being Site 71 to being Site 8.
I reserve the right to ignore people who have made no attempt to the read the manual, and expect others to do it for them.
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Re: 154 MHz DMR Tier 3

Postby moj » Sat Sep 03, 2016 9:28 am

I've just checked here aswell in Manchester minus1 and I,m also picking up dmr on 154.08125 tier 3 , site L2-6.4 , so like you say its def in use but so far heard no audio yet m8 but either way thanks for sharing the info cause its def worth a watch ;)
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Re: 154 MHz DMR Tier 3

Postby Aderzon » Tue Oct 04, 2016 6:07 am

I can hear it hear in Newcastle Under lyme it shows as Tier 3 with colour code 0 and a site number 43,58,44 and no audio on my BCD536HP but no idea who is as yet but when I look at it with DSDplus it show L numbers pursuing are the LCN number and it shows registration required so it still under construction and being tested. When I checked ofcom site it show reserved for Emergency services but no idea which one. I know it will not be the police there changing over to an LTR system I think unless they changed there mind and changing to DMR Tier 3 if do use some of it it's now doubt be encrypted. We just have to listen and wait.
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Re: 154 MHz DMR Tier 3

Postby Minus1 » Tue Oct 04, 2016 8:06 am

The OFCOM site is, as usual, being consistently inconsistent.

The reference to emergency services refers to the previous users of the band, before Airwave.
Though MP still have one frequency at 155.5375.

Check below frequencies from the WTR

Joint Radio Company Ltd
TX: 154.500 MHz
RX: 143.500 MHz
Bandwidth: 1000 kHz

I suspect it is Western Power Distribution.
There are a number articles out there, though none talk about frequency.
e.g.
http://www.landmobile.co.uk/news/simoco ... stribution
https://www.simocogroup.com/media-and-e ... nt-project

154.56875 (site 24) is from one of the two masts near Meriden.
154.91875 (site 20) is from the old VHF TV mast near Tamworth.

Your mention of sites 43/44/58 suggests it's having a hard time getting the data accurately, with 2nd and 6th digit fluctuating:
43=101011
44=101010
58=111010
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Re: 154 MHz DMR Tier 3

Postby bigboyblue » Fri Oct 07, 2016 11:01 am

You sure its not the expansion of the new mountain rescue network 'up north'.

DMR, tier 3, on vhf.
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Re: 154 MHz DMR Tier 3

Postby Aderzon » Sat Oct 08, 2016 9:57 am

Looks like it is a COMMUNICATIONS NETWORK FOR WESTERN POWER DISTRIBUTION and still being rolled out all over the midlands. I read something about emergency service won't be using 154 to 156 anymore as they are changing from Tetra / Airwave to a new LTR system using O2 mobile system to allow for more data control and better communication. I will be interesting to see how the scanner handles Tier 3 system.
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Re: 154 MHz DMR Tier 3

Postby Minus1 » Sun Oct 09, 2016 8:15 am

bigboyblue wrote:You sure its not the expansion of the new mountain rescue network 'up north'.

DMR, tier 3, on vhf.


Yep, two more found this week, both from one of the two masts at Copt Oak in Leicestershire:

http://www.geograph.org.uk/photo/3856187

154.80625 Site 5
154.93125 Site 6

The SARcomm transmission from the same site is 163.875 (Site 15) MotoTRBO
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Re: 154 MHz DMR Tier 3

Postby Aderzon » Sun Oct 09, 2016 10:54 am

In newcastle under Lyme I receive it on 154.08125, 154.08125, 154.78125 and 154.94375 all using 6.25 KHz steps and shows as network L2 channel numbers starting with L2 then 6.4, 8.3, 6.5, 1.6 . those will be channel number or LCN numbers and colour code is still 0 I think there waiting for the licence upgrade or permission from Ofcom.
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Re: 154 MHz DMR Tier 3

Postby G4RMT » Sun Oct 09, 2016 8:29 pm

I don't know if this is just coincidence, but the new marine vertical I have just put up has caused some grief on SDR+ as the rather open wide front end is having trouble with new VERY strong digital stuff in 154MHz. The mast quite close to me - less than half a mile, always had some 154 and 155 data links in its but there is now quite a few very strong data signals, that are so strong they appear as phantoms in 156MHz marine, with the usual amount of gain. I've no way of telling what they are as I have nothing to decode them with. Just a bit odd and a coincidence they've just appeared?
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Re: 154 MHz DMR Tier 3

Postby Minus1 » Mon Oct 10, 2016 8:43 am

G4RMT wrote:I don't know if this is just coincidence, but the new marine vertical I have just put up has caused some grief on SDR+ as the rather open wide front end is having trouble with new VERY strong digital stuff in 154MHz. The mast quite close to me - less than half a mile, always had some 154 and 155 data links in its but there is now quite a few very strong data signals, that are so strong they appear as phantoms in 156MHz marine, with the usual amount of gain. I've no way of telling what they are as I have nothing to decode them with. Just a bit odd and a coincidence they've just appeared?


If these transmissions are Western Power Distribution, whatever you are receiving is not them as they don't cover your area:
https://www.westernpower.co.uk/About-us ... -area.aspx
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