Posts by hb9dug

Hello Achim (DH2VA)

Any news of the AMSAT-DL comments to the ESA Proposal ?

73 de michel, hb9dug

For Rolf DJ7TH

I think that in general, copying software, firmware, etc. is a bad idea.

- you can infringe copyright...

- very quickly the versions on the site are no longer up to date...

- it doesn't teach our HAM friends to look for information themselves

Link (URL) to the information is the right thing to do.

73 de michel, hb9dug

For ON4BCB

You can start at a very low cost to receive QO-100 DATV with a USB RTL-SDR stick.

Have a look here : https://home.swissatv.ch/2023/04/qo-100-en-datv/

73 de michel, hb9dug

Ohan ZS1SCI is publishing a software called DATV-Red. It is designed to be a GUI for the latest PlutoDVB2 firmware from Evariste F5OEO.

It is written with Node-RED, a visual programming tool for creating JavaScript functions.

Software (open source) is available on github : https://github.com/Psynosaur/DATV-Red

Here is the link to the AMSAT-UK proposal:

https://www.amsat.org/wordpres…GEO-proposal-AMSAT-UK.pdf

Evariste F5OEO has released new firmware for the Pluto: PlutoDVB2

PlutoDVB2 firmware is a dvb dedicated firmware. It uses dvbs2 modulator in fpga.

It can handle transport stream for video and also ip (dvb-gse).

It could also be used as a standard pluto and can be used by third party software like gnuradio, sdrconsole...with a PTT function on gpio.

All the info on the wiki : https://github.com/F5OEO/pluto-ori-ps/wiki

Bonne bidouille !

73 de michel, hb9dug

For those who are not familiar with receiving DATV signals with SDRangel, thanks to Tom ZR6TG for his tutorial on how to do it, in a few simple steps, demodulating and decoding a DATV signal.

https://www.zr6tg.co.za/2022/1…ng-with-sdrangel-and-sdr/

73 qro de michel, hb9dug

qo100_datv.py - Quick control of configuration for receiving QO-100 DATV

Thanks to Edouard F4EXB, now the script supports all the usual SDRs:
Airspy, AirspyHF, BladeRF2, HackRF, LimeSDR, PlutoSDR, RTLSDR, SDRPlay1, USRP and XTRX.

https://github.com/f4exb/sdran…/scriptsapi/qo100_datv.py

https://github.com/f4exb/sdrangel/blob/master/scriptsapi/sdrangel.py

73 qro de michel, hb9dug

I forgot one more point, you can set up a "command" in SDRangel to easily start the python script.

See screenshot below.

Hello SDRAngel fans,

for info, the DATV Demodulator module in the latest 7.8.1 release now has a "volume button" (next to Sym/s) that allows you to select the standard SRs we use easily.

Edouard has also written a python script that allows you to configure the DATV Demodulator by entering only the frequency and the SR.

You can find it here:

https://github.com/f4exb/sdran…r/scriptsapi#qo100_datvpy

I used qo100_datv.py in a "basic" python script (udp-rx.py) that runs QO-100 WB Quick Tune. The script waits to receive info from a transmission when a spectrum is clicked and then passes the frequency and SR info to qo100_datv.py which sets up the DATV Demodulator module.

udp-rx.zip

You need also sdrangel.py which holds the constants required by qo100_datv.py

https://github.com/f4exb/sdran…ter/scriptsapi#sdrangelpy

Good fiddling

73 qro de michel, hb9dug

I confirm no success without pilots even on the bench

Offset dish 120cm and Bulleye LNB

Not too close adjacent tx...

Takes sometimes 1 - 2 min to lock

73 de Michel

Hello George,

I have been successful this morning receiving my 8psk sr250 signal on QO-100 with dvbs2-rx. See attached screen dump. At the moment, only by recording the TS and after looking at it with VLC.

72 qro de michel, hb9dug

For those who have not heard of Edouard F4EXB's SDRAngel with its modules for DATV reception and transmission, you will find below the link to a presentation made at the DATV Forum (HAMRADIO 2022) on this topic.

A DATV Transceiver with SDRAngel

Allergic to linux ? A Windows version is available which works very well now that it integrates the LDPC software decoder.

73 de Michel / HB9DUG

Bonjour George,

If you haven't seen it yet, there was a presentation of gr-dvbs2rx by the developer, Igor Freire at GRcon 22.

The presentation can be found on YouTube:

GNU Radio Conference - Monday Sept 26, 2022

https://www.youtube.com/watch?v=1jJWfsGeZvE

start at 58 min.

As a reminder:

the documentation: https://igorauad.github.io/gr-dvbs2rx/

the software: https://github.com/igorauad/gr-dvbs2rx

73 de Michel, HB9DUG

Bonjour Tom,

Thank you for this nice application. Works fine here on a PI3 4Gb.

If you are looking for a feature request for the next version ... I think that a Chat window at the bottom (with an option to display it or not) will be useful making your Windows Longmind client a one-stop shopping for a QO-100 Reception.

73 qro de michel, hb9dug

Hello Baris,

I asked the question regarding the sat file for the following reason :

I use a Bullseye LNB that I don't want to modify. To bring back the QO-100 frequencies in the range of the SF8008 tuner, I use a converter called SUP-2400 (https://home.swissatv.ch/2013/12/lnb-avenger-et-convertisseur-sup-2400/) .

Unfortunately it reverses the frequency...

IN 250-750 MHz OUT 2150-1650 MHz LO 2400 MHz

So your plugin will be the place once working to modify to do the math for me !

73 qro de michel, hb9dug

oh2uds

Does your plugin use a satellite profile ? If Yes which one ?

73 de Michel, HB9DUG

@OE3GBB

Thank you for your post !

I had forgotten that the software (OpenATV 7.1) uses python 3 !

The plugin works without any problem now.

73 de Michel, HB9DUG

Bonjour Baris,

Thank you for your interesting plugin.

I have Open ATV 7.0 on a SF8008 and installed your plugin without problem but I have no success installing the websocket client.

See msg :

root@sf8008:~# opkg install python-websocket-client

Couldn't find anything to satisfy 'python-websocket-client'.

Unknown package 'python-websocket-client'.

* opkg_solver_install: Cannot install package python-websocket-client.

I tried another way by installing pip3 to be able to do after : pip3 install websocket-client... but I was unsuccessful at installing pip3.

Your help will be appreciated.

73 de michel, hb9dug

Bonjour Roberto,

Thanks you for the Patch v.1.6 .

Can I suggest to add in MiniTioune Settings for LNB Volts parameter the 0V setting.

I think that I am not the only one to have an active splitter in front of the MiniTioune that already supplies power to the LNB.

73 qro de michel, hb9dug