Clear Tetra

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bozzy
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Clear Tetra

Post by bozzy » 25 Mar 2018, 15:56

Been playing with the new Tetra plugin for SDR# (runs completely under windows without the need for any Linux files).

Is Tetra used at all for commercial purposes?

Basically, is there any non-encrypted Tetra? As so far, even in the 450 MHz band, all Tetra is encrypted in this area so far.

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bozzy

jhampton2000
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Re: Clear Tetra

Post by jhampton2000 » 25 Mar 2018, 16:17

The simple answer is yes.....some examples include Cardiff Shopwatch/Stadium, Cabbots Circus Bristol, some Prisons in the SW, Nottingham Trams. I'm sure there are others. The plugin works well: pity it's only single frequency and no logging so far.

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Minus1
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Re: Clear Tetra

Post by Minus1 » 26 Mar 2018, 09:13

I've heard that Highland Council Highways use it. It was cheaper to adopt Airwave than build dozens and dozens of their own transmitters to cover their mountainous area.
KEY : = channel/stud | ~ = CTCSS/DCS | ^ = transmitter site | ¯ = overhead | * = trunked

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radiosification
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Re: Clear Tetra

Post by radiosification » 26 Mar 2018, 16:39

Minus1 wrote:
26 Mar 2018, 09:13
I've heard that Highland Council Highways use it. It was cheaper to adopt Airwave than build dozens and dozens of their own transmitters to cover their mountainous area.
I heard something about that too but if they're on Airwave it means they'll be encrypted.
If you're interested in digital voice, check out my YouTube channel:
http://www.youtube.com/radiosification

bozzy
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Re: Clear Tetra

Post by bozzy » 26 Mar 2018, 19:29

Thanks for replies.

Plenty of signals in my area (York) around 390 MHz, obviously Airwave and encrypted (gargled audio).

Got a couple around 450 MHz, but again gargled, was just interested to hear some clear tetra on my setup with this new plugin.

Plenty of clear mototrbo in my area though, just would be nice to see this tetra plugin work with some audio here.

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Bozzy.

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Metradio
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Re: Clear Tetra

Post by Metradio » 26 Mar 2018, 19:33

Had the same problem with my AOR AR-DV1 I wanted to proove that it would receive TETRA DMO, in the end I had to borrow a suitable radio (don't ask)...

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Whistler WS1088 / TRX-1 / Whistler Q / UBCD3600XLT / WTR Browser.

bozzy
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Re: Clear Tetra

Post by bozzy » 26 Mar 2018, 20:13

Just to add for others that may help, who own an sdrplay RSP2.....

The new Tetra plugin will not work with older versions of SDR# (ie using SDR# 1361), an issue with .net versions, I even tried forcing .net versions in the sdr# startup file.

I even tried pumping the audio from sdr-uno via cable into a newer version of sdr#, but it won't work.

Had to re-call my rtl stick from a m8 that I loaned out too,

Plugin appears to work with newer versions of sdr# and an rtl stick, getting data, but all garbled audio in my area.

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Bozzy

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Re: Clear Tetra

Post by scottyboy » 31 Mar 2018, 08:42

Airwave = encrypted TEA2
Some (if not all) prisons in England and Wales = Encrypted TEA1
Everything else I’ve been told about is clear including London Underground, some airports air radio, some wind farms along with what’s mentioned above.
Airwave use 390-395 and in London and possibly other areas use 422-424 MHz also
Commercial users mainly use 420-425mhz and 440-460mhz
Airwave is the only uk wide network with most others being single cell sites or some multi cell sites but coverage only in the areas they need.
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neil57uk1
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Re: Clear Tetra

Post by neil57uk1 » 01 Apr 2018, 14:37

Tyne & Wear Metro is converting to Tetra. About 30 freqs in the 440/441 MHz range. Only a couple of hours from York.

bozzy
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Re: Clear Tetra

Post by bozzy » 03 Apr 2018, 10:14

Thanks

The frequencies you posted was very useful.

Today I finally found a Tetra signal and it was in the clear and worked fine using the new plugin!

:D
scottyboy wrote:
31 Mar 2018, 08:42
Airwave = encrypted TEA2
Some (if not all) prisons in England and Wales = Encrypted TEA1
Everything else I’ve been told about is clear including London Underground, some airports air radio, some wind farms along with what’s mentioned above.
Airwave use 390-395 and in London and possibly other areas use 422-424 MHz also
Commercial users mainly use 420-425mhz and 440-460mhz
Airwave is the only uk wide network with most others being single cell sites or some multi cell sites but coverage only in the areas they need.

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thelad
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Re: Clear Tetra

Post by thelad » 03 Apr 2018, 15:55

Can you expand on who the user may be?
Uniden UBC120XLT
Uniden USC230E
Uniden UBC3500XLT
Binatone PMR MR500 x2
Magiksun TM-490 (BF-888) x3
Baofeng BF-888
TTI TSC 100R
Baofeng UVB5
Zastone D900
Icom IC-R6

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Re: Clear Tetra

Post by scottyboy » 03 Apr 2018, 16:33

Any chance of the location and any information you have found?
Even it’s in a pm.
I’m trying to build a database of users in the uk.
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bozzy
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Re: Clear Tetra

Post by bozzy » 06 Apr 2018, 16:06

Will respond to both via PM

neil57uk1
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Re: Clear Tetra

Post by neil57uk1 » 17 Apr 2018, 07:07

Plenty of questions but not so keen to share finds!

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MrWeetabix
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Re: Clear Tetra

Post by MrWeetabix » 17 Apr 2018, 10:49

Sharing info via PM is good practice if you think that the organisations being listened to may kick up a stink about it. It protects you and ( more importantly :lol:) Me/TM1 too, so more power to your PM elbows people :thumbup:
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