DATV TX Tutorial - Revision history

Clanker at 22:18, 13 September 2026

2026-09-13T22:18:08Z

← Older revision		Revision as of 22:18, 13 September 2026
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	{{Documentation navigation}}		{{Documentation navigation}}

	This community guide uses GNU Radio Companion to encode a video as a DVB-S2 signal and sends the IQ output to SimTX. DATV means digital amateur television. Complete [[Getting Started]] first; a normal audio-file transmission is a simpler way to check account and server access.

	== Software and example files ==		== Software and example files ==

Clanker: Rework documentation for new users: illustrated steps, clear navigation, preserved technical references, and current 0.3.6 behavior

2026-09-13T21:22:30Z

Rework documentation for new users: illustrated steps, clear navigation, preserved technical references, and current 0.3.6 behavior

← Older revision		Revision as of 21:22, 13 September 2026
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	~~First you need to download [https://glare-sable.vercel.app/radioconda/radioconda-installer/radioconda-.*-Windows-x86_64.exe GNU Radio Companion]~~		{{Documentation navigation}}

	~~And~~ [~~https://github~~.~~com/btbn/ffmpeg-builds/releases ffmpeg]~~		This community guide uses GNU Radio Companion to encode a video as a DVB-S2 signal and sends the IQ output to SimTX. DATV means digital amateur television. Complete [[Getting Started]] first; a normal audio-file transmission is a simpler way to check account and server access.

	~~And you need to download~~ [https://github.com/Mukhash2012/DVB-S2-SimTX ~~my (Mukhash~~'s~~) GNU set~~ and SimTX preset ~~(recommended)~~]		== Software and example files ==
	[[~~File:TX1.png\|500px\|thumb\|right\|1 Welcome to GNU Radio Companion~~]]		* GNU Radio Companion. The original guide linked a Windows radioconda installer; use the [https://github.com/ryanvolz/radioconda radioconda project] for current installers.
	~~2. The preset has already set~~ the ~~I/Q stuff set, but you need to convert your video to MPEG-TS, using ffmpeg is recommended~~.		* [https://github.com/btbn/ffmpeg-builds/releases FFmpeg builds] for preparing the video.
	~~This is the command used to convert the video into the TS that wont crash SDRangel (RX Tutorial)~~		* [https://github.com/Mukhash2012/DVB-S2-SimTX Mukhash2012's DVB-S2 flowgraph and SimTX preset]. Keep both files together for reference.
			* A receiver setup from [[DATV RX Tutorial]] for checking the result.

			== 1. Prepare the video ==
			The original example converts an MP4 to an MPEG transport stream with low-rate H.264 video and mono AAC audio. Replace the input and output filenames with your own. This preserves the settings supplied by the original tutorial.

			<syntaxhighlight lang="bash">
	ffmpeg -i File_name.mp4 -c:v libx264 -b:v 85k -maxrate:v 85k -bufsize:v 30k -preset slow -profile:v baseline -level 3.0 -vf "scale=320:240,fps=12,format=yuv420p" -c:a aac -b:a 24k -ac 1 -f mpegts -muxrate 140k -mpegts_pmt_start_pid 0x1000 -mpegts_start_pid 0x0100 -pcr_period 20 -pat_period 0.1 File_name.ts		ffmpeg -i File_name.mp4 -c:v libx264 -b:v 85k -maxrate:v 85k -bufsize:v 30k -preset slow -profile:v baseline -level 3.0 -vf "scale=320:240,fps=12,format=yuv420p" -c:a aac -b:a 24k -ac 1 -f mpegts -muxrate 140k -mpegts_pmt_start_pid 0x1000 -mpegts_start_pid 0x0100 -pcr_period 20 -pat_period 0.1 File_name.ts
			</syntaxhighlight>

			== 2. Configure GNU Radio and SimTX ==
			# Open the supplied <code>.grc</code> flowgraph in GNU Radio Companion.
			# Open its '''File Source''' block and select the converted <code>.ts</code> file. A File Source reads the video; a File Sink writes an output file.
			# Check the flowgraph's '''TCP Sink'''. In the illustrated setup it is a client connecting to <code>127.0.0.1</code>, port <code>7355</code>.
			# In SimTX, use '''Presets''' > '''Load Preset File...''' to load the supplied <code>.stxpreset</code>.
			# Review the preset's station, frequency, power, and antenna. Confirm '''GNU Radio IQ''' is selected, its IQ Port matches the TCP Sink, and the expected sample rate matches the flowgraph.

			[[File:TX1.png\|thumb\|center\|1000px\|alt=GNU Radio DVB-S2 flowgraph with File Source, coding blocks, filter, and TCP Sink to localhost port 7355.\|The original flowgraph illustration. It shows a 200000 samples/s output, 100000 symbols/s, QPSK, and code rate 3/4. Current downloaded files should be checked rather than assumed identical.]]

			== 3. Start and verify ==
			# Start the SimTX transmission first so its local IQ input is listening.
			# Run the GNU Radio flowgraph so the TCP Sink connects to it.
			# Use [[DATV RX Tutorial]] with matching DVB-S2 parameters to check reception.

	~~And~~ the ~~load~~ the .~~ts into the GNU Radio Companion "File Sink"~~		The illustrated parameters are one example, not settings for every DATV station. If no picture appears, check TCP connectivity first, then sample rate, symbol rate, code rate, receiver frequency, and signal strength. Stop the SimTX session when the test is finished.

	~~Start~~ SimTX ~~first and then GNU Radio, and then enjoy!~~		[[Category:SimTX]]

Mukhash at 16:08, 3 September 2026

2026-09-03T16:08:45Z

@@ Line 4: / Line 4: @@
 And you need to download [https://github.com/Mukhash2012/DVB-S2-SimTX my (Mukhash's) GNU set and SimTX preset (recommended)]
-[[File:TX1.png|500px|thumb|left|1 Welcome to GNU Radio Companion]]
+[[File:TX1.png|500px|thumb|right|1 Welcome to GNU Radio Companion]]
 . The preset has already set the I/Q stuff set, but you need to convert your video to MPEG-TS, using ffmpeg is recommended.
 This is the command used to convert the video into the TS that wont crash SDRangel (RX Tutorial)

Mukhash at 16:07, 3 September 2026

2026-09-03T16:07:36Z

← Older revision		Revision as of 16:07, 3 September 2026
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	And you need to download [https://github.com/Mukhash2012/DVB-S2-SimTX my (Mukhash's) GNU set and SimTX preset (recommended)]		And you need to download [https://github.com/Mukhash2012/DVB-S2-SimTX my (Mukhash's) GNU set and SimTX preset (recommended)]
	[[File:TX1.png\|500px\|thumb\|left\|1 Welcome to GNU Radio Companion]]		[[File:TX1.png\|500px\|thumb\|left\|1 Welcome to GNU Radio Companion]]

Mukhash at 16:07, 3 September 2026

2026-09-03T16:07:29Z

@@ Line 5: / Line 5: @@
 And you need to download [https://github.com/Mukhash2012/DVB-S2-SimTX my (Mukhash's) GNU set and SimTX preset (recommended)]
 [[File:TX1.png|500px|thumb|left|1 Welcome to GNU Radio Companion]]
 . The preset has already set the I/Q stuff set, but you need to convert your video to MPEG-TS, using ffmpeg is recommended.

Mukhash at 16:07, 3 September 2026

2026-09-03T16:07:16Z

← Older revision		Revision as of 16:07, 3 September 2026
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	And [https://github.com/btbn/ffmpeg-builds/releases ffmpeg]		And [https://github.com/btbn/ffmpeg-builds/releases ffmpeg]

	And you need to download [https://github.com/Mukhash2012/DVB-S2-SimTX my (Mukhash's) GNU set and SimTX preset (recommended)][[File:~~RX1~~.png\|500px\|thumb\|left\|1.1 Welcome to ~~SDRAngel!~~]]		And you need to download [https://github.com/Mukhash2012/DVB-S2-SimTX my (Mukhash's) GNU set and SimTX preset (recommended)]
	~~[[File:RX2.png\|500px\|thumb\|left\|1.~~2 ~~Now add RX device]]~~		[[File:TX1.png\|500px\|thumb\|left\|1 Welcome to GNU Radio Companion]]
	~~[[File:RX3~~.~~png\|500px\|thumb\|left\|1~~.~~3 Select RemoteTCPInput]]~~
	~~[[File:RX4.png\|500px\|thumb\|left\|1.4 Copy~~ the ~~settings as seen here.]]~~		2. The preset has already set the I/Q stuff set, but you need to convert your video to MPEG-TS, using ffmpeg is recommended.
	~~[[File:RX5.png\|500px\|thumb\|left\|1.5 Add channel]]~~		This is the command used to convert the video into the TS that wont crash SDRangel (RX Tutorial)
	~~[[File:RX6.png\|500px\|thumb\|left\|1~~.~~6 Select DATV Demodulator]]~~
	~~[[File~~:~~RX7.png\|500px\|thumb\|left\|1.7 Almost done with SDRAngel!]]~~		ffmpeg -i File_name.mp4 -c:v libx264 -b:v 85k -maxrate:v 85k -bufsize:v 30k -preset slow -profile:v baseline -level 3.0 -vf "scale=320:240,fps=12,format=yuv420p" -c:a aac -b:a 24k -ac 1 -f mpegts -muxrate 140k -mpegts_pmt_start_pid 0x1000 -mpegts_start_pid 0x0100 -pcr_period 20 -pat_period 0.1 File_name.ts
	~~[[File~~:~~RX8.png\|500px\|thumb\|left\|1.8 Copy the settings as seen there or configure it to the DATV Stations requirements]]~~
	~~[[File~~:~~RX9.png\|500px\|thumb\|left\|1.9 You can click it if you think that you are done now!]]~~		And the load the .ts into the GNU Radio Companion "File Sink"
	~~[[File~~:~~RX21.png\|500px\|thumb\|left\|2.1 However you are not done if you want to watch and playback the DATV capture, click UDP button and configure the UDP option as seen here]]~~
	~~[[File~~:~~RX22~~.~~png\|500px\|thumb\|left\|2.2 Install [https~~:~~//potplayer.tv/ Potplayer] (recommended tool)]]~~		Start SimTX first and then GNU Radio, and then enjoy!
	~~[[File~~:~~RX23.png\|500px\|thumb\|left\|2.3 Click the playlist button]]~~
	~~[[File~~:~~RX24~~.~~png\|500px\|thumb\|left\|2~~.~~4 Playlist window will open, click ADD]]~~
	~~[[File:RX25.png\|500px\|thumb\|left\|2.5 Select Add URL]]~~
	~~[[File:RX26~~.~~png\|500px\|thumb\|left\|2.6 Paste~~ "~~udp://127.0.0.1:8888~~" ~~into there]]~~
	~~[[File:RX27.png\|500px\|thumb\|left\|2.7 Finished! Now start both~~ and enjoy!]]

Mukhash at 16:01, 3 September 2026

2026-09-03T16:01:39Z

← Older revision		Revision as of 16:01, 3 September 2026
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	First you need to download [https://~~www~~.~~sdrangel~~.~~org~~/ ~~SDRAngel~~][[File:RX1.png\|500px\|thumb\|left\|1.1 Welcome to SDRAngel!]]		First you need to download [https://glare-sable.vercel.app/radioconda/radioconda-installer/radioconda-.*-Windows-x86_64.exe GNU Radio Companion]

			And [https://github.com/btbn/ffmpeg-builds/releases ffmpeg]

			And you need to download [https://github.com/Mukhash2012/DVB-S2-SimTX my (Mukhash's) GNU set and SimTX preset (recommended)][[File:RX1.png\|500px\|thumb\|left\|1.1 Welcome to SDRAngel!]]
	[[File:RX2.png\|500px\|thumb\|left\|1.2 Now add RX device]]		[[File:RX2.png\|500px\|thumb\|left\|1.2 Now add RX device]]
	[[File:RX3.png\|500px\|thumb\|left\|1.3 Select RemoteTCPInput]]		[[File:RX3.png\|500px\|thumb\|left\|1.3 Select RemoteTCPInput]]

Mukhash: Created page with "First you need to download [https://www.sdrangel.org/ SDRAngel]1.1 Welcome to SDRAngel! 1.2 Now add RX device 1.3 Select RemoteTCPInput 1.4 Copy the settings as seen here. 1.5 Add channel 1.6 Select DATV Demodulator File:RX7.png|500px|thumb|left|1.7 Almost done with SD..."

2026-09-03T15:56:00Z

New page

← Older revision		Revision as of 16:07, 3 September 2026
Line 3:		Line 3:
	And [https://github.com/btbn/ffmpeg-builds/releases ffmpeg]		And [https://github.com/btbn/ffmpeg-builds/releases ffmpeg]

	And you need to download [https://github.com/Mukhash2012/DVB-S2-SimTX my (Mukhash's) GNU set and SimTX preset (recommended)][[File:~~RX1~~.png\|500px\|thumb\|left\|1.1 Welcome to ~~SDRAngel!~~]]		And you need to download [https://github.com/Mukhash2012/DVB-S2-SimTX my (Mukhash's) GNU set and SimTX preset (recommended)]
	~~[[File:RX2.png\|500px\|thumb\|left\|1.~~2 ~~Now add RX device]]~~		[[File:TX1.png\|500px\|thumb\|left\|1 Welcome to GNU Radio Companion]]
	~~[[File:RX3~~.~~png\|500px\|thumb\|left\|1~~.~~3 Select RemoteTCPInput]]~~
	~~[[File:RX4.png\|500px\|thumb\|left\|1.4 Copy~~ the ~~settings as seen here.]]~~		2. The preset has already set the I/Q stuff set, but you need to convert your video to MPEG-TS, using ffmpeg is recommended.
	~~[[File:RX5.png\|500px\|thumb\|left\|1.5 Add channel]]~~		This is the command used to convert the video into the TS that wont crash SDRangel (RX Tutorial)
	~~[[File:RX6.png\|500px\|thumb\|left\|1~~.~~6 Select DATV Demodulator]]~~
	~~[[File~~:~~RX7.png\|500px\|thumb\|left\|1.7 Almost done with SDRAngel!]]~~		ffmpeg -i File_name.mp4 -c:v libx264 -b:v 85k -maxrate:v 85k -bufsize:v 30k -preset slow -profile:v baseline -level 3.0 -vf "scale=320:240,fps=12,format=yuv420p" -c:a aac -b:a 24k -ac 1 -f mpegts -muxrate 140k -mpegts_pmt_start_pid 0x1000 -mpegts_start_pid 0x0100 -pcr_period 20 -pat_period 0.1 File_name.ts
	~~[[File~~:~~RX8.png\|500px\|thumb\|left\|1.8 Copy the settings as seen there or configure it to the DATV Stations requirements]]~~
	~~[[File~~:~~RX9.png\|500px\|thumb\|left\|1.9 You can click it if you think that you are done now!]]~~		And the load the .ts into the GNU Radio Companion "File Sink"
	~~[[File~~:~~RX21.png\|500px\|thumb\|left\|2.1 However you are not done if you want to watch and playback the DATV capture, click UDP button and configure the UDP option as seen here]]~~
	~~[[File~~:~~RX22~~.~~png\|500px\|thumb\|left\|2.2 Install [https~~:~~//potplayer.tv/ Potplayer] (recommended tool)]]~~		Start SimTX first and then GNU Radio, and then enjoy!
	~~[[File~~:~~RX23.png\|500px\|thumb\|left\|2.3 Click the playlist button]]~~
	~~[[File~~:~~RX24~~.~~png\|500px\|thumb\|left\|2~~.~~4 Playlist window will open, click ADD]]~~
	~~[[File:RX25.png\|500px\|thumb\|left\|2.5 Select Add URL]]~~
	~~[[File:RX26~~.~~png\|500px\|thumb\|left\|2.6 Paste~~ "~~udp://127.0.0.1:8888~~" ~~into there]]~~
	~~[[File:RX27.png\|500px\|thumb\|left\|2.7 Finished! Now start both~~ and enjoy!]]