Taking place on the 9th and 10th of Marchthe second AMSAT-F Recontre Radiomateur Spatiale saw 15 lectures and six short presentations on the topic of amateur satellite communications from a total of 20 contributors.
SDR-Console Markers for new Transponder Bandplan
Evariste Courjaud was responsible for configuring the modulation part of the transmission setup. Transmitting, however, is only half of the equation — and the LimeSDR family proved its worth on the receive side, too. Knowing Spanish, I can understand a little, but not enough to follow a talk.
So I had the talks at background to look at the slides every once in a while. The result: the ability to capture and decode the video and audio from the talks on demand, including one on amateur satellite regulation by Sylvain Azarian. The rest is standard equipment for satellite TV and it is really inexpensive. You can use it as a spectrum analyser and see full commercial DVB-S2 multiplexes, which are usually transmitted at 27 Msps.
It is also interesting to look out for the narrower packetised traffic and the beacons.
Very interesting signals can be seen. The Transmission Evariste Courjaud was responsible for configuring the modulation part of the transmission setup.
LimeSDR is a low cost, open source, apps-enabled more on that later software defined radio SDR platform that can be used to support just about any type of wireless communication standard. If you're Sam Machin, Andrew Back, and colleagues, you get 16 rapidly-deployable GSM base stations for use at Electromagnetic Fielda three-day event held in the middle of a field every two years.
GPUs are increasingly being used in applications outside of graphics and have been popular for some time in both high performance computing HPC and machine learning. Thanks to technologies such as the CUDA parallel computing platform from NVIDIA and the Numba high performance Python compiler, the barriers to using GPUs are being lowered all the time, enabling their blistering performance to be harnessed in ever more compute-intensive applications.
It brings together makers, open source hackers, radio amateurs and researchers, to tackle the challenges in using…. Pre-built operating system image - now compatible with all Raspberry Pi models plus the LimeNET Micro - aims to make it as easy as possible to get started with software defined radio on single-board computers. Founder Jensen Huang unveils Aerial software development kit, while telling attendees at Mobile World Congress that a new more readily reconfigurable network architecture with compute at the edge will be required for 5G to succeed.
It helps end uncertainty which has stopped or slowed infrastructure being put in place across London with a new, consistent approach," says City of London chief digital officer Theo Blackwell.
At the first launch, the software offers you to search for your SDR devices, which must be connected to your computer. On the Radio Definitions window, click Search to add your device that you have connected to the computer.
Here I am looking for the RTL stick. Beforehand, we will ensure that frequencies above MHz can be displayed without any problems by the software:.
We will now enter the conversion frequency as Here, I entered several frequencies, close to 9 MHz. The reason is explained below. Since version 3. Simon G4ELI has developed a software system for controlling the reception window by referring to the modulated BPSK beacon located at the end-of-band of the transponder.
The beacon frequency is known and fixed at 10, MHz. You should see the upper band beacon modulated in BPSK. If, as in the above capture, you do not see this QO beacon, this means that your LNB has a frequency difference too high for display the beacon in the — range proposed by SDR Console. To display the BPSK beacon, you will then need to add different conversion frequencies reduced or increased to the list of Down Convertersas presented above in the text. On the following picture, and in my case, by selecting a Down converter frequency of 9the BPSK beacon appears well now in the window.
Click with the mouse on the beacon itself, so that the two white lines at the top and bottom of the window are aligned with the beacon. You then read live the delta of frequencies measured by SDR Console, the delta is the difference between the actual frequency and the expected frequency of the beacon.
Here on this capture, it is 13, kHz. Considering the conversion currently in placethe delta is actuallykHz. To start the frequency correction, click on the second Enable button on the side band. The button is active highlighted. The entire spectrum is then automatically adjusted by SDR Console to place the beacon at its fixed frequency of 10 kHz, whatever the real drift that the entire spectrum is undergoing due to the drift of the LNB.
When SDR Console is launched in the future, you will no longer have to perform steps 1 and 2, but only step 3 to select the BPSK beacon and launch the locking feature click on Enable. Merci pour ce travail. F8GHE Christian. Translation Congratulations for the pedagogical quality of this synthetic and complete article.
So I look forward to its equivalent for the transmit line. F6CNG Olivier.QRZ Forums. I now have a working full duplex QO system using a PlutoSDR transmitting and receiving via a single dish and the Pluto at the same time. It is a system in development read as strung out across the desk! I just pointed the dish, set up a transponder in the TV box and the signals were there, around Mhz That got me to thinking if I could get a transmitting system going with little money and minimum effort too… I have never had any experience with 2.
I took the cable out of the equation and connected the PA directly to the helix in the drizzling rain! So, after some determined head scratching I realised that the issue was the modified to stay in TX mode Chinese wifi PA is not being driven with enough power.
So off to Amazon… I bought a very cheap linear preamp, that was supposed to give 22db gain at 2. There I was a carrier about 12db over the noise on the TP on QA, a signal sent more that 44, miles round trip. I powered it down and then adjusted some connections etc.
I should not have used that power to supply the preamp! So I went back to Amazon, and bought different the more robust SPFZ module Pre-ampand a box of 6 buck converters so I could power things from the same supply. When that arrived, I set a buck converter to 5v, and connected it all up and hit tune, and it worked again, but I think the SPFZ has less gain than the one I was using, so I was even weaker, and certainly not usable for voice on SSB, but I did send lots of digital modes and SSTV and received it all OK on my receiver with drift.
I then set up the Pluto in full duplex and moved the RX to the same machine and here I am now. Things to do when I can: a Sweep the helix and adjust it properly! The Pluto is missing a decent TCXO, so as the temperature changes the transmitter drifts in the wind. This is very pronounced at 2.
I realise the danger of sending unwanted transmissions from the computer here, but in my tests, as long as it is in SSB mode, there is NO output obviously in FM or AM it will be transmitting all the time, so this would not work as a workaround.
The real solution to this is to replace the 40Mhz local oscillator with something more stable… Being all surface mount means that this is not too easy for us mere humans to just connect a TCXO which you can easily do with a HackRF BTW.
However I have been told that if you cut a single track and attach a wire to it, you can inject a LO from an external source.Could you send me the link also, The link here takes me to the forum dspite beeing logged in to the site.
Same observations from my side, I first thought that was my installation, but I will follow DK1KQ recommendations to not touch anything yet. PTT input from the transmitter and output to the up-converter is possible via the handshake lines.
For this the up-converter requires an additional transistor. Receive only operation is also supported. First, the system must be set to a reference signal menu item "Lock", right mouse button. This is used to calculate the actual LO frequency and as master signal for the software drift correction.
Default setting is beacon of Es'hail-1 menu item "Master". With the preset RF frequency you have to adjust the peak in the audio spectrum to 1. This process must be repeated occasionally if the LO frequency has drifted too far away.
If you have problems, you should experiment with the parameters and possibly restart the program unfortunately this function is not perfect at the moment. Fast fine adjustment is possible with a beacon signal in NB passband button "Adjust". This procedure should be performed before each operation after a short warm-up phase. Because the SDR software sometimes shows errors of some Hz. This often happens when you restart GQRX, change frequency ranges or if you tune via the big frequency indication digits.
The fine adjustment should be checked regularly. In the future hopefully this step can be omitted. Now the TX offset should be set menu item "Offsets". Alternatively, the offset can also be adjusted via a frequency tuning on the SDR or on the transmitter previously unlock tuning knob during transmission.
For this the "Auto tracking" function have to be activated. The remaining functions hopefully are self-explanatory. But please note: The basic functions are given, but there are still errors. Because it's just a quick, stupid and dirty solution I am only a little hobbyist and not an engineer. Important: The respective license terms apply. All the software comes without any warranty and without special support. Hi Frank, download and unzip ok.
Will install it soon on my raspberry pi. First test for me will be the lock to master funktion. Let you know soon my results. Maybe your downloaded file is corrupt.
Here no problems on different systems and with different ZIP-Tools. I also tested 7-ZIP.You seem to have CSS turned off. Please don't fill out this field. QOPluto Web Site. Please provide the ad click URL, if possible:. Help Create Join Login. Operations Management. IT Management. Project Management. Services Business VoIP.
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These libraries are installed if you execute. Look for the driver that supports your computer. Then you can use it without sudo. This frequency must be the frequency of the CW Beacon minus 25 kHz. This frequency must be the middle of the transponder MHz.
If you use a down-mixer or if you feed the LNB's LO with a different frequency, then calculate the frequency as follows:. This situation should be handled automatically. Therefore there are two short scripts which start the server automatically after an error.
Before doing this you will need to enter the correct frequencies delivered by your LNB into these script!!! Make two directories, one for WB and the other for NB and copy this software into both. In one directory compile the software for WB by running. Just be sure that you use the correct frequencies for each version. Just click on a signal in the spectrum or waterfall and the Minitiouner will be tuned to this signal.
Before compilation you can change these settings in qowebsdr. The default value 1 allows remote control in the home network only.Приём радиолюбительского спутника QATAR OSKAR - 100 на Web SDR. QO -100 Narrowband Web SDR
When the ICOM checkbox is activated in the browser, the frequency of the Icom TRX will be read and the marker and lower waterfall will be set to this frequency every ms. Then rebuild the software. Skip to content. Dismiss Join GitHub today GitHub is home to over 40 million developers working together to host and review code, manage projects, and build software together. Sign up. Branch: master. Find file. Sign in Sign up.
Go back. Launching Xcode If nothing happens, download Xcode and try again. Latest commit. Latest commit cd Apr 3, Update V2.
Beaconlock temporarily deactivated. RTLsdr offset can be corrected in rtlsdr. New beacon lock follows in the next update.It seems you are using a mobile device; click here to switch to the mobile version of this site. It seems Java is not installed or disabled on your computer. Auto update 60s. Click on the image. See the slide bar. Last 10 spots from users of this WebSDR. Waterfall view: Speed: super slow very slow slow medium fast Size: small medium large larger huge View: spectrum waterfall.
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LimeSDR Mini – Full Duplex SDR Transceiver – DATV – QO100 – Es Hail 2
This WebSDR is currently being used by? The operators of this site disclaim any responsibility for text appearing in this chatbox. Next to the url Google Chrome will indicate an icon "Unsafe Site" 2.
Click on this item, select "Site settings" and Enable Audio for this site 3. Refresh now this page with F5. CW signal on Many excellent stations present today. Thanks friends. In prog set Op. Temporary Emergency Frequency - Speed: super slow very slow slow medium fast Size: small medium large larger huge View: spectrum waterfall.