Comment on Tutorial on Setting up OP25 for P25 Phase 2 Digital Voice Decoding by Ron

Wrong! Lately most large police departments either just changed to digital or planning on it. Maybe the small communities which don’t have the money to upgrade are using analog, but I have seen many medium to large cities move to digital, and mostly P25 Phase II. That is why I don’t have a trunker monitor anymore, the last 4 places I have moved to are all P25 Phase II now. At least that’s how it is in the US.

Иванов Кирилл к «Менеджер частот из комплекта SDRSharp со сканером.»

перезалейте плиз фаил

Comment on New TETRA Trunk Tracker for use with SDR# and the TETRA Demodulator Plugin by Anonymous

… realtime decoding may not be possible but how about some kind of buffering and decoding bit later in a separate process/machine …?

Comment on New TETRA Trunk Tracker for use with SDR# and the TETRA Demodulator Plugin by thewraith2008

I’m sure it would possible to process the Normal/Sync continuous downlink bursts output from UDP, I would be concerned that the further delay would cause an issue with timing of calls possibly cutting off the beginning of a call. Which already seems to happen in some cases.

While I have inspected the UDP for bursts and found the sync, I have not gone further than the descrambling of broadcast/block1 and 2 bits through RM(30,14).
This is a lot beyond my knowledge on the subject.

I think in the end it would be better to start something from scratch.

RTL-SDR Discussion • USB Filter box already offered by Würth as design kit

Würth already offers this design bag that provides you with the PCB layout and design shown in ANP024c_EN_The_USB_interface_from_EMC_point_of_view.pdf. I only wonder if replcing the plastic with a metall shield box box would not reduce RFI further.
The Complete USB 2.0 EMI & ESD Solution

You have trouble with noise on your USB 2.0 interface and don’t know how to solve it?
We have the solution for you.

In most EMI labs you can find our "USB 2.0 EMC Adapter" (p/n 829 999 STICK). This stick can be connected to your device during test to improve its EMC susceptibility. In general you will pass all the EMI and ESD test now.
USB-Dongle_geschlossen_res09.jpg
Now you have the choice:

You can either redesign your board and integrate the filter layout like shown above. We have prepared a special design bag (p/n 829 999 BAG) containing the necessary parts.
https://www.we-online.com/web/en/electr ... USB2_0.php

There might be people interested to buy a already assembled box, but I wonder if they are willing to pay as much as production would cost.

Statistics: Posted by snn47 — Sat Jul 21, 2018 4:50 pm


Comment on New TETRA Trunk Tracker for use with SDR# and the TETRA Demodulator Plugin by Anonymous

… maybe it is possible to develop new external decoder which uses UDP output from SDR# TETRA demodulator plug-in? https://teknokoodiradio.vuodatus.net/lue/2018/07/sdrsharp-tetra-plug-in-udp-raw-data-logger-with-python

Troubleshooting Help • Re: ggrrr no Radio Sonde Decode

The are ~5gb Audio Files in total. :lol:

Statistics: Posted by Username — Sat Jul 21, 2018 2:10 pm


RTL-SDR Discussion • Re: 10 feet / 3 meters USB extension cord

:D How about the idea with buy an big box with this Adpter and resell them?

Statistics: Posted by Username — Sat Jul 21, 2018 2:09 pm


Comment on New TETRA Trunk Tracker for use with SDR# and the TETRA Demodulator Plugin by thewraith2008

No one knows where TSSDR has gone. Maybe just a well deserved break. And from what I understand, he does not even have live TETRA in his location and developed the plug-in from IQ samples. Amazing really.

I do not have his source code.
My work is independent from his but with the goal of improving on what already has been done.
People love to jump to conclusions.

Comment on New TETRA Trunk Tracker for use with SDR# and the TETRA Demodulator Plugin by Gérald

Great app!
The bad news is that it seems TSSDR has stopped developing his SDR# Tetra plugin and gave source code to an Australian company. At least it is was i understand from a Google translation of a russian forum: http://www.radioscanner.ru/forum/topic50051-29.html#msg1385459

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