AOR DV1 and TETRA

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AOR DV1 and TETRA

Postby Minus1 » Fri Oct 27, 2017 4:06 pm

A question for anyone who has an AOR DV1.

I understand that it will handle any unencrypted direct-mode (DMO) transmissions.

What does it do when you search the very busy Airwave TMO/AGA band (390.1625-394.9875 MHz)?

Does it identify strong signals as "TETRA"?
Does it show the site ID? (There must be some unencrypted data, otherwise users who don't use encryption wouldn't be able to find the system)
Does it identify them as something else?
Does it even detect them?
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: AOR DV1 and TETRA

Postby Mark5R » Fri Oct 27, 2017 5:30 pm

It picks them up and shows the signal strength but that's about it. No info whatsoever :sad:

And I am yet to find a DMO user. If it wasn't for my mate who has a tetra radio in DMO I would never have had one tetra decode from the DV1. At least I know DMO works but it would be nice to find an actual real world user!
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Re: AOR DV1 and TETRA

Postby Metradio » Fri Oct 27, 2017 7:23 pm

Same here, I had to borrow some Tetra DMO kit to prove that it worked..

Mike
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AOR AR-DV1 Digital Voice Receiver / eSPY on ARD.
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Re: AOR DV1 and TETRA

Postby Davie Boy » Fri Oct 27, 2017 10:53 pm

Has anyone here picked up and heard Tetra DMO in The UK?....

Would be interested to know what you heard?....
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Re: AOR DV1 and TETRA

Postby YorkshireBiker » Wed Nov 08, 2017 5:12 pm

There are a few videos on you tube showing people using TETRA in DMO I am guessing the reason why we dont hear them is because these radios are very low on the output.
1 watt I think so you would have to be pretty close to hear them.
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Re: AOR DV1 and TETRA

Postby Metradio » Wed Nov 08, 2017 5:33 pm

YorkshireBiker wrote:There are a few videos on you tube showing people using TETRA in DMO I am guessing the reason why we dont hear them is because these radios are very low on the output.
1 watt I think so you would have to be pretty close to hear them.


Lucky to see one putting out 1/2watt in DMO..

Mike
Connect Systems CS750 and CS800, Hytera PD-365, Motorola DP4600.
Raspberry Pi 2 and DV4Mini HotSpot.
AOR AR-DV1 Digital Voice Receiver / eSPY on ARD.
WS1088 / TRX-1 / Whistler Q /UBCD3600XLT / WTR Browser.
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Re: AOR DV1 and TETRA

Postby Frequency Hopper » Wed Nov 08, 2017 5:56 pm

Metradio wrote:Lucky to see one putting out 1/2watt in DMO..

Mike

Yes I think that is more closer to the truth than a watt. Whenever I measure a so called 5 watt radio they always are putting out more like an average of 4 watt and mostly below. I have managed to find a Tetra DMO user very close to my home. Around 40 meters over a km to be precise so very close. I have antennas on my roof and the basement but can never get a decode from them at home. At their car park they are very clear, but when we drive away and turn onto the main road as soon as we turn the first corner (around 150 meters away) they start to break up on my DV-1 in the car and that is with a VHF/UHF mag-mount on the car. They do use them inside the building and not outside so they seem ideal to use in a one building environment and even more secure as the signal does not travel far away from their own building.

Good for them, bad for me and other would-be listeners. I can get 446 users on half a watt from miles away at home though. Is 1 watt a set limit on Tetra DMO?
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Re: AOR DV1 and TETRA

Postby Metradio » Thu Nov 09, 2017 12:32 pm

Frequency Hopper wrote:
Metradio wrote:Lucky to see one putting out 1/2watt in DMO..

...Good for them, bad for me and other would-be listeners. I can get 446 users on half a watt from miles away at home though. Is 1 watt a set limit on Tetra DMO?

Spec is < 1 watt, but they are also not tuned for max out on DMO..
Connect Systems CS750 and CS800, Hytera PD-365, Motorola DP4600.
Raspberry Pi 2 and DV4Mini HotSpot.
AOR AR-DV1 Digital Voice Receiver / eSPY on ARD.
WS1088 / TRX-1 / Whistler Q /UBCD3600XLT / WTR Browser.
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Re: AOR DV1 and TETRA

Postby bigboyblue » Thu Nov 09, 2017 12:35 pm

There's a few of the 'walty' private event medical / first aid providers using tetra handsets on dmo, no other reason than to 'look cool'.
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