Nottingham Trent University

Scanning radio frequencies for the East Midlands
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nerdsville
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Nottingham Trent University

Post by nerdsville » 11 Jul 2013, 12:36

Spotted a strong digital signal this morning on 455.550MHz, quick look on WTR only gave one likely local suspect but they have turned to the digital dark side, colour code 3, system covering all three campuses it seems.

Monitored it to confirm my suspicions and was hilarious as they seemed to getting used to and/or testing the system, so it seems it must be relatively new.

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Re: Nottingham Trent University

Post by bigpimp347 » 12 Jul 2013, 08:08

just a load of farty noises here..
strong, but just data noises i assume this is that mtrbo thing ??
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Re: Nottingham Trent University

Post by nerdsville » 12 Jul 2013, 08:43

Correct, digital MOTOTRBO/DMR was using DSDforWin to decode it.

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Re: Nottingham Trent University

Post by Gemini4 » 19 Jul 2013, 11:03

same here..just intermittent noise :!:

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Re: Nottingham Trent University

Post by nerdsville » 19 Jul 2013, 11:12

Gemini4 wrote:same here..just intermittent noise :!:
That is because as I've said twice already it is a digital signal (MOTOTRBO/DMR) which I was able to decode using my FUNCube Dongle SDR and DSDforWin.. ;)

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Re: Nottingham Trent University

Post by Gemini4 » 19 Jul 2013, 11:14

nerdsville wrote:
Gemini4 wrote:same here..just intermittent noise :!:
That is because as I've said twice already it is a digital signal (MOTOTRBO/DMR) which I was able to decode using my FUNCube Dongle SDR and DSDforWin.. ;)
right nerdsville..tell me how to do it with the dongle..i have a funcube 2

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Re: Nottingham Trent University

Post by archspoofer » 19 Jul 2013, 11:19

I've been using a scanner with a Discriminator tap and it works a treat but getting DSD to run in DOS was a bit of a pain in the ass,had to get the old brain cells working :lol:

How easy is it with a Dongle do you still go line in or not ?
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Re: Nottingham Trent University

Post by nerdsville » 19 Jul 2013, 11:37

archspoofer wrote:How easy is it with a Dongle do you still go line in or not ?
No easy answer I'm afraid it can be easy or can be a pain 8)

Most users end up having to install some form of 'virtual audio cable' software that routes the audio to the decoder using software, and you still have to use the DOS window and set up your 'input/recording' source accordingly.

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Re: Nottingham Trent University

Post by nerdsville » 19 Jul 2013, 12:01

Gemini4 wrote:
nerdsville wrote:
Gemini4 wrote:same here..just intermittent noise :!:
That is because as I've said twice already it is a digital signal (MOTOTRBO/DMR) which I was able to decode using my FUNCube Dongle SDR and DSDforWin.. ;)
right nerdsville..tell me how to do it with the dongle..i have a funcube 2
Sorry as much I would love to the complexity, lack of documentation and numerous downloads and set up steps involved would mean I would probably be here forever...
however if you do search on here and the web there are plenty of others who have made it work.

Here is a guide written for users of RTL-SDR devices (the FUNCube works in a similar way)
http://www.rtl-sdr.com/rtl-sdr-radio-sc ... -with-dsd/

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Re: Nottingham Trent University

Post by Gemini4 » 19 Jul 2013, 16:19

:cry: :cry: :cry: ok

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