tetra July 2012

tetra@lists.osmocom.org

9 participants
7 discussions

TETRA test samples
by Dieter Spaar 01 Feb '13

01 Feb '13

Hello, there is now a test sample (bit file) with speech at http://tetra.osmocom.org/trac/wiki/Test_Samples Please only add samples to this page if you have the full agreement for publishing from all involved parties (e.g. operator of the network, people speaking during the capture). This is not the place to share captures which were made from someone else without their knowledge. Best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

2 2

wrong decim with fcd device / osmosdr-tetra_demod_fft.py
by Stefan Mandl 24 Jul '12

24 Jul '12

Hello, using a FUNcube dongle, the first_decim rate is to high. regards Stefan My patch --- a/src/demod/python/osmosdr-tetra_demod_fft.py +++ b/src/demod/python/osmosdr-tetra_demod_fft.py @@ -61,8 +61,11 @@ class top_block(grc_wxgui.top_block_gui): out_sample_rate = symbol_rate * sps options.low_pass = options.low_pass / 2.0 - - first_decim = 10 + + if sample_rate == 96000: + first_decim = 2 + else: + first_decim = 10 self.offset = 0

1 0

code-linking
by Graham Palmer 18 Jul '12

18 Jul '12

Hi all Can anyone give me any ideas how to link the traffic.data to the channel decoder (ETSI) in real time to enable a continuous real time decoder from demod to audio. Many thanks and best regards. Graham p.

1 0

code-linking
by Graham Palmer 18 Jul '12

18 Jul '12

Hi all. Can anyone give me an idea how to link the traffic.data to the channel decoder (ETSI) in real-time to make a continuous real time decoder. Many thanks and best regards. Graham p.

1 0

Address/Usage Marker decoding patch
by Ronny Kunze 14 Jul '12

14 Jul '12

Hello, here is a small patch for the address and usage marker decoding. There is a wrong offset for the usage marker used. Ronny

2 1

control and listen tetra unencrypted network
by Media 12 Jul '12

12 Jul '12

hi all, I would like to know, if someone tested the network in ex-jugo states (like is Slovenia)? In our country use no encrypted network (clear, no TEA encrypted)... So, i wonder if is possible with osmcom project to listen (real time) to tetra groups? If is possible to do this with DVB-T reciver, like this: http://www.youtube.com/watch?v=Z0hEquzLsWU product: https://www.cosycave.co.uk/product.php?id_product=220 This means that you can monitoring all tetra network, but not for voice,because i need a voice decoder? Thanks for help and answers.

4 13

Nokia TETRA device configuration ?
by Dieter Spaar 09 Jul '12

09 Jul '12

Hello, does anyone here has experience with the configuration of some older Nokia TETRA devices like the TMR420, HRU420 or THR850 ? The manufacturer does no longer support them so there seems to be no official way to get the required information. If you can help, please contact me privately. Thanks and best regards, Dieter -- Dieter Spaar, Germany spaar(a)mirider.augusta.de

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tetra July 2012