VU3BCN: the Global Beam of 10°E (circular polarized) should work, i believe you use C-Band in India?
https://www.lyngsat.com/Eutelsat-10A.html
Maybe you could try 'Impact Africa TV', it has a low symbolrate of 1125ks.
'TCV International has 1000ks', also worth a try.
GSAT17 as 93,5°E also has C-Band transponders.
Maybe 4148V (Sadhna Aryan / Vip News) if you can only receive horizontal/vertical.
@VU3BCN: I'm using different signals from many satellites for testing purposes. Normal FTA transponders on TV Satellites are no different from Es'Hail 2 Amateur TV signals, except the larger bandwidth. But there are also SCPC (Single Channel per Carrier) Transponders on commercial satellites that i use for testing. High bandwidth transponders are hard to decode without a hardware solution, due to the lack of computing power. I've optimized my software quite well, however there's still headroom for improvements. I'm using Intel VTune for spotting performance issues, and i write custom assembly code for critical sections, using architecture specific SIMD instruction sets like SSE/AVX.
My original goal was to develop open source hardware, and implementing the demodulator in a FPGA chip. I'll definitely do that, but right now i'm mainly working on this software due to the positive feedback from the community.
Hi, just fixing the last 8PSK problems. Next release will probably be on thursday.
Hi all!
Sorry that i didn't write anything in this forum for a while.
I just wanted to say that i'm still working on this project, even if i didn't finish as much work as i wanted. I'll definitely release a new version this month. I'm currently working on 8PSK support, and there will be fixes for annoying things, for example saving application state like bandwidth/frequency settings, and changing local oscillator frequency, so that you don't have to calculate frequencies manually.
Kind regards,
Marcel
3b8fa: (Pat) Hi, we could try using Teamviewer, i'll take a look at it tomorrow if you send me the ID and password.
To be honest, your signal looks quite strong in the FFT plot. It must be something with the symbolrate being wrong. DId you use M&M / (Müller & Mueller TED) for timing recovery? that's necessary for RTLSDR sticks to receive the beacon. If you haev Timing lock, you should atleast see a circle in the IQ Plot.
@SWL-ALAIN: can you send me a screenshot?
i want to know the device name from the dropdown box.
The part called 'hwVer' should only be one of these:
#define SDRPLAY_RSP1_ID (1)
#define SDRPLAY_RSP1A_ID (255)
#define SDRPLAY_RSP2_ID (2)
#define SDRPLAY_RSPduo_ID (3)That's why i thought that the RSP2Pro wasn't supported.
Maybe RSP2 and RSP2Pro share the same ID.
I only tested with RSP1A, so it's a good thing to hear that they all work.
Hi, it supports only RSP1A and RSP2Duo
Edit: sorry, that wasn't correct, it supports RSP1, RSP1A, RSP2, RSP2Duo.
But not the RSP2Pro. I'll try to add this one, too
why did you turn interpolation off? it's never a good idea 
Increasing damping for short periods of time helps, too, while keeping the gain value relatively high. High symbolrates lock faster, because there are more symbols to average out noise, that's how the loop filter works.
Version 2.0.11
Download: http://v.1337team.tk/dvb-s_gui_amsat.zip
Changelog:
The next version won't take as long as this one, there are still many smaller things to improve. There will be more changes to the FFT Plot, because in the long run, transponder stats / signal infos will be shown there for each transponder. Maybe left click for moving the spectrum, and right click for selecting transponders. we'll see. For the next smaller update, i'll probably automate things like FEC / Modcode selection and centering / locking.
For now, i'm interested about what the Airspy owners tell me 
@IU2KAC: SNR meter is in the TODO list very long now, i'll need to do that soon. Probably in the next version. (2.0.12)
@DB8TF: auto scanning the whole spectrum sounds like a great idea, but i think that will be implemented a bit later, when i also do multi-signal reception. That means in version 2.1.0 which will take a bit time, because it will mostly contain new features instead of fixes.
Edit: i kniow that i didn't implement saving of last used fequency and gain setting. definitely in 2.0.12
DD0KP: can you tell me the exact CPU model? quadcore CPU isn't very specific. I think that this PC will be okay but not great. 4 cores or more is what i recommend, and it should have all features my software needs. But what concerns me, is that they don't even write the exact specifications on their homepage.
Edit: Ok i looked it up, it's a Intel® J3455 QuadCore. It won't work with my software, because it has no support for SSE4.1. I also wouldn't expect very much from this hardware otherwise. That thing isn't worth 400EUR. Maybe the only thing justifying the price s that it's a bundle with keyboard, mouse, monitor.
Do you really need a bundle? This thing also has passive cooling (TDP is 10W), so i don't think that the CPU is great at all. 4GB of RAM also isn't very future proof. We have win10 computes at work and upgraded the RAM capacity to 8GB, and they are also used mainly for office and surfing the internet. Windows also almost eats up 1GB itself.
DK8KW: your observations are correct. Weak signals mean more work for the LDPC Decoder.
@Tony: i already implemented that and it will be in the next version.
Hi, version 2.0.10 ist zurzeit aktuell.
I fixed the DNS entries, now all links should work normally again.
Thanks nico.
i'll try to resolve the DNS issue, in the meanwhile you can use the static IP address of my server.
http://94.130.76.213/dvb-s_gui_amsat.zip
@ik1hgi Tony: i'm glad it works for you now
@ON7NDR: thanks nico, for this great documentation i think that will help new users a lot.
I noticed one weird thing by the way: in the console output, it says QPSK 2/3 and Pilots on, that must be a bug. QPSK never has pilots enabled. Atleast it wouldn't conform tot he standard. I'll look into that. I'll also start to play with two AirSpy samples i received recently.
@DB8TF: currently, there is no obvious was of determining the correct mode.
The only thing you can look for is the IQ Plot. If you choose DVB-S2, and you see almost no symbols flashing up in the constellation, then it's probably DVB-S1. Because Symbols are only being shown when the DVB-S2 start of frame condition (SOF) is detected.
@DB8TF: your settings look good actually, can you try re-checking the carrier recovery box and increase the loop gain to maximum for a short period of time? the signal looked fine to be honest.
Hi, yes, but the signals look very week. they will be hard to lock. but maybe it works
DB8TF: what do you mean with pilot tone? If you mean pilot symbols then no, they wouldn't cause a line in the spectrum, they are scrambled with the PLSC like the data symbols (slots). In DVB-S2, QPSK doesn't have pilots enabled anyway, because there is no need for them.