Bad modules?

Hi, I might be able to fix these. As mentioned the problem is usually a bad front end IC but they are also affected by the counterfeit/dodgy regulator issue. If you get to them in time the fix is very simple.

I've also been looking into doing a clock mod as there are now better options than buying a $$$ TCXO such as a single chip clock solution that uses molecular oscillators available sometime in 2020.

Added advantage is that you can monitor the clock itself with SDR to see if the physics package is working, which is handy for time nuts and other folk interested in high accuracy.

If you ever wanted to see the actual atomic transitions then this is great.

submitted by /u/Conundrum1859
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Comment on SDR# TETRA Decoder Plugin Updated by Anonymous

Plugin-in provides raw binary data output via UDP port
https://teknokoodiradio.vuodatus.net/lue/2018/07/sdrsharp-tetra-plug-in-udp-raw-data-logger-with-python

Comment on A Tutorial on using SDRAngel for DMR, D-Star and Fusion Reception with an RTL-SDR by Probir Debnath

I have followed the instruction and confirming mine is 64bit and 64bit os. The sdrangel folder has been placed in the program folder. NOW i start the sdrangel software. when i play – it says “entry point error”. IS IT COMPATIBLE WITH HACKRF

SDR# // missing rtlsdr.dll — No device detected!

Hey everyone, new to SDR#. I just bought my first RTL-SDR and am trying to set up SDR#. Had a few hurdles I managed to get over but can't seem to solve this last step, which I think is the last step!

I followed the rtl-sdr quick-start guide and when executing the install-rtlsdr.bat file, I get an error saying "the system cannot find the path specified."

I scroll up and see that the URL it's trying to grab from is not working. On the RTL-SDR.com's website there's a link that is scratched out with a new link saying the old link was down. However, the new link is also down and I'm not able to get to this specific URL.

I was able to run zadig and get my rtl-sdr recognized but Step 5 mentions a file rtlsdr.dll which I cannot seem to find.

Can anyone help? Thanks.

submitted by /u/jonathsk
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RTL-SDR Discussion • EMC of USB cables and extension cords

While having shielding to improve electromagnetic Compatibility (EMC) is always a good advise it is imho, if at all, hard to achieve and therefore only make believe.

Unlike coax cable, you will not be able to find the necessary shielding information for USB cable or connector because the USB as system system was designed to be cheap and dirt cheap, EMC was therefore never a consideration until USB got faster and interference increased, similar to AC wiring used by Power Line Communication (PLC) or RF-leaking Cable Television (CATV) distribution networks. Even though CATV was designed to provide adequate shielding leakeages not exceeding 20 dBpW in reality those values were meassured to exceed this max. allowable leackage by a factor of 1000000.

Unlike USB CATV use has a defined impedance and shielding characteriscs. The faster USB gets the more problematic EMC and shielding will get, especially if you are only willing to spent just a few $, € for a complete cable. While twisted pair for a data line was intended to a cheap way for slow signal connections, but never at the speeds we use today. USB has neither a defined impedance nor shielding requirements. from start to end like coax cable and connectors were designed for. Even coax connectors perfomance will degrade the more often they are used, the most sensitive ones are rated for less than 5 connections.

Then there is not only interference from the data line,but also the power supply line noise to consider. Power supply line noise depends in addition to shielding of cable and connectors on the quality of the switching circuits regulating the supply voltage,

Wurth provides an overview on USB EMC and this example of power supply noise. The reference is *10 dBm and the vertical axis in 10 dB steps!
power supply noise.JPG
https://www.we-online.com/web/en/index. ... f_view.pdf

Wurth also odders a WE-USBH Connector with Integrated EMI & ESD function (WE-USBH EPLE connector) which is around 6 € a piece in quantities of 100.
USB Jack Kombi.jpg


DS can be found here https://www.mouser.de/ds/2/445/wurth_84 ... 369809.pdf

Unfortunately USB shielding does not com cheap, unless you are happy with a so called placebo effect to keep your mind at peace.

Statistics: Posted by snn47 — Sat Jul 21, 2018 7:47 am


Off-Topic • SDR# TETRA demodulator plug-in raw binary data output via UDP

https://teknokoodiradio.vuodatus.net/lu ... ith-python

Statistics: Posted by rtlsdrdev-user — Sat Jul 21, 2018 6:56 am


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

I made a utility program to deal with this pop-up error. It is supplied.
You are not using the supplied ‘Net Remote’ plug-in.

All this is covered in the supplied documentation. (Which I spent some time preparing)

User Projects • New update

This is the forth release of this program. (TETRA Trunk Tracker v0.99.7)
And third release for (TETRA Trunk Tracker v0.99.7s - Simple)

I Have created a SX version which adds SDS GPS locations plotting in DSDPlus LRRP program.
This is very experimental as is why is is separate. But is the same as "Simple".
Normal version does not have it yet and will depend on demand for it.
Read "TTT_SDS_test_version_usage.pdf"
Let me know if it works for you. Send me a screenshot via PM. (I don't receive SDS Location PDUs here)

Image
Image

It is in alpha stage. This means is may contain errors that may cause issues with the other programs it
works with. i.e. crashing them or itself. Although I'm not seeing this.

If SDR# is crashing when 'Demodulator' is enabled, it's because you have not set-up the plug-in correctly.
You MUST do this 1st. This is NOT TETRA Trunk Trackers fault.

You generally need to get these installed:
"Microsoft .NET Framework 4.6.2 (Offline Installer)"
"Microsoft .NET Framework 4.7.2 (Offline Installer)"
"Microsoft Visual C++ 2015 Redistributable" and install both 32/64 bit versions (if you use 64 bit OS)

The TETRA plug-in currently(?) been developed by TSSDR is also in early development. Because of this
any changes made in plug-in releases most likely will break this program.


Two versions are available:
  • Normal (Uses 2 SDR# and 2 Dongles)
  • Simple (Uses 1 SDR# and 1 Dongles with some features not available)
This version is more of a bug fix:
  • See 'changelog.txt' for details
  • Seems the 64bit Net Remote plug-in does not work, so I removed it. Just use the 32 bit version.
Has been tested on Windows 7 - Professional SP1 (32 bit), English
Has been tested on Windows 10 - ? (64 bit)

The more people that report what their OS is that they got TETRA Trunk Tracker working in, the better. I can add to list.
(Is it Windows 7,8,10 - Basic, Home, Professional, Ultimate, Enterprise - 32/64 bit)


I have created it to suit my needs. And it currently works for me with the TETRA network I monitor.

I make no claim that it will work for other networks.

Please read the provided files for set-up and usage:
  • TTT_set-up_manual.pdf
  • TTT_Features_and_Usage.pdf
I have tried to be as thorough as possible with the documentation to explain usage and features.
I believe any questions can be answered by reading these files.
These files most likely are not complete and contain errors and are not laid out as good as they could be.

It only works with the provided TETRA plug-in supplied in zip. (2018-June-06).
This version uses a custom compiled version of 'Net Remote' supplied in zip

It is only meant to be a temporary solution until something better comes along.

Hopefully all goes well for you setting it up.

Download link

MD5 HASH cafc8eadbb74d221fe9f50f886e7594c

Here is a short video showing another test with LRRP using some fabricated TETRA SDS PDUs. A lap around Bahrain Grand Prix circuit.

Statistics: Posted by thewraith2008 — Sat Jul 21, 2018 2:52 am


User Projects • Re: TETRA Trunk Tracker for use with SDR# and TETRA Demodulator plug-in

The 'Net Remote' plug-in (or any plug-in for that matter) can only do what SDR# plug-in interface allows it to do.

If SDR# says volume range is 25-60, then that's all there is to it.

Statistics: Posted by thewraith2008 — Sat Jul 21, 2018 2:49 am


New to rtl-sdr, trying to make a police scanner.

I'm trying to make a police scanner in gnuradio-companion for my first rtl-sdr project. Does anyone have any resource suggestions or advice? Thank you for any help.

submitted by /u/mythrilman
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