Архив за 19.02.2020

Other SDR Devices • Automatic notch-filter for SDR# ?

SDRconsoleV3 has a function called notch-filter, which, when activated, automatically removes the humming from spikes in the bandwidth you're listening to.

It's very useful, in my opinion, since it has the effect of nulling out the buzzing these spikes can create and convert the sound into a more 'clean' noise.

I found a manual notch-filter for SDR# (Mentioned by rtl-sdr.com actually :) ) but that is useful for removing a single or a couple of big spikes, but not for automatic 'notch-cleanup'.

Is there any plugins for SDR# that can mimic the notch-filter function found in SDRconsoleV3?

I am currently using Spectrum-Lab on the side, which also has an automatic notch-cleanup function (It's automatically switched on when you choose the VLF mode in speclab) which is quite effective on speech.

But if a plugin exists for SDR# that would be a nice addition.

Statistics: Posted by JEL — Wed Feb 19, 2020 11:04 pm

Amazing python interference to RTL-SDR

Amazing python interference to RTL-SDR submitted by /u/abraham_ai19
[link] [comments]

Off-Topic • Re: .NET/Python developer resources

Hi Ryan,

Your solution will not compile because as you mention, the dll files referenced can not be resolved.

This means: Visual Studio can not find those those referenced dll files. This is because the person who wrote the ZoomFFT plugin has those files on their own machine, probably in a differently named SDR# root folder as well.

Here are the steps to rectify this:

1) In your visual studio designer, go to the "Solution Explorer"

2) Locate the entry which reads "References".

3) Expand that entry (if it is not already).

4) The sub-entries (references) which have YELLOW WARNING ICONS are the unresolved references.

5) On each reference entry with the warning icon, RIGHT-CLICK and select "Delete" (see below)
6) Now that you have removed those unresolved references, we need to re-reference the dll files properly...

7)Right click on "References" entry and click on the "Add Reference..." (see below)
8) Now the "Reference Manager" will open.

9) In the reference manager, click on the BUTTON at the BOTTOM of the window which reads "Browse..." (see below)
10) in the browse dialog that opens, browse to your SDR# root folder. Mine is shown the example below. Yours may be different...

11) Press CONTROL to multi select the SDRSharp.PanView.dll, SDRSharp.Common.dll, and the SDRSharp.Radio.dll files.

12) Once you have all three selected, hit the "ADD" button.

13) After the browse file dialog closes, ensure that all three dll file names appear in the Reference Manager and click OK.

14) The proper references are now in the solution BUT we have a few more steps before it will compile.

15) The latest version of SDR# (Version 1732) includes the new Telerik themed controls. Unless you have your own paid license key file for Telerik we need to delete the original authors licence key file reference or else it will not compile.

16) going back to the "Solution Explorer" again, locate the entry which reads "Properties"

17) Under the 'Properties entry you will see a sub entry reference which reads "license.licx" with a yellow icon on it.

18) Right click on the entry and click "Delete"


20) Compile the solution

21) Now, in your solution folder, you should find the "SDRSharp.ZoomFFT.dll" in your "ZoomFFT\obj\Debug" folder (if your debugging) or in the "ZoomFFT\obj\Release" folder if your building a release version.

if you need any further help please let me know.

PLEASE ALSO NOTE: to have your plugin work correctly in SDR# you must also target your framework to ".NET 4.6", target the x86 processor and make sure the "Allow Unsafe Code" directive is checked.

However; this should already be the case for the ZoomFFT example you are using.

Statistics: Posted by EddieMac74 — Wed Feb 19, 2020 9:52 pm

Better signal reception for ATC?

Dear rtl-sdr users,

In my attic I have a Raspberry Pi running with a simple blue RTL-SDR stick with a r820t2 chip and default antenna. I use it for my ATC project and it is receiving really well, but I want to improve my signal without using it outdoors. Is it recommended to buy a RTL-SDR V3? Or using Ferrite beads? What are some simple improvements? Hope some of you can help me out.

submitted by /u/robin591
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Laptop for Linux SDR

The laptop I have is almost entirely incompatible with any version of Linux. Every attempt of SigintOS, Ubuntu, Pop!_OS, and Manjaro has failed to even finish booting. I'm thinking of installing Linux on a cheap Chromebook. Any suggestions?

submitted by /u/knuckledragger242
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KerberosSDR • Re: KerberosSDR Developments in 2020

What's the state of the beamforming functionality?
I looked at the github repo and couldn't find anything related to it, but I would love to get my hinds dirty with it.

My ideal setup: 4 stationary (QFH?) antennas connected to the kerberossdr and then the software on the raspi/server it's connected to has e.g. a rigctl compatible service running so that gpredit can send the calculated direction of a satellite to it.
It then uses the provided direction to do beamforming towards that direction and presents a "virtual" rtlsdr with the result of the beamformed signal via e.g. the rtl_tcp protocol. So you could connect your SDR software to it to change frequency/sample rate/...
And then you have a SATNOGS station without any moving parts.

I know that getting there takes a lot of work and I would love to help work on this goal :)

Statistics: Posted by parameter-pollution — Wed Feb 19, 2020 8:14 pm

Transmit Mic PTT

submitted by /u/Maeky1986
[link] [comments]

Antenna for 470-617 Mhz


I just recently purchased an SDR so that I can monitor wireless frequencies for microphones. We use many types, with a range between 470-617MHz, and am looking for a decent Omni antenna that picks up that range.

A point in the right direction would be appreciated! Thanks

submitted by /u/nasbats
[link] [comments]

Comment on MEMESat-1: A Meme-Beaming Cubesat Currently In Development by flid

Yaaay lets put more unnessacery crap into orbit to add to the tons of it already up there.

Comment on Gaining Access to Windows on the Flex 6500 SDR Transceiver and Installing Other Programs by Robert

Absolutely spot on.
Sure, there is a price to pay for R&D, tight tolerance components, as well as fancy sampling devices, but the rest is all just software… 1’s and 0’s .
The prices some of the big names are charging is plain outrageous, then add to that cutting or withholding a reasonable support request? about as arrogant as they can get.

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