SSTVSlow Scan TV

David Day N1DAY

Ernie Hollingsworth KC4SIT

BRARC 5 February 2019

SSTV Audio

http://www.techedupteacher.com/wp-content/uploads/2014/01/sstv-scottie1.wav

What is SSTV➢ Way of sending video over voice bandwidth.

➢ Computers have made this once expensive mode available to all hams with a radio, computer, and sound card.

➢ Invented by Copthorne Macdonald – University of Kentucky – 1957/58.

➢ First used on 11M band.

➢ Reception required darkened room and imagine was visible for 8 seconds before fading. Image often recorded to tape.

➢ Video signal had black at 1500 Hz and white at 2300 Hz; synch pulses, which are blacker than black, are at 1200 Hz.

➢ Semiconductor memory chips become the milestone between old and modern image transmission. CRT need eliminated.

➢ 70 different modes now many of which are unique and incompatible.

➢ Today SSTV utilized on HF, VHF, UHF; SSB, FM, AM. Most activity on 20 meters.

EH

SSTV Timeline

➢ Introduced to hams in 1958 - QST

➢ First image across Atlantic 20 December 1959.

➢ First used to send back pictures of dark side of moon from Luna 3 (Soviet). 1959.

➢ Employed by NASA in Faith 7 with Gordon Cooper. ➢ Continued use in Apollo 7, 8, 9, 11, Lunar Module.

➢ 10 frames a second with 320 frame lines.

➢ March 1964 ARRL article A Compact Slow-Scan TV Monitor (p. 43).

➢ Copthorne works from 1958-1968 perfecting SSTV to meet FCC approval.

➢ FCC approves SSTV for Advanced class hams 1968; Conditionals and Generals approved at later date. Commercial equipment started appearing 1970.

➢ SSTV all software mode 1982….many formats for TX developed.

EH

First Across Atlantic

EH

The Skinny ~ARRL~➢ An Introduction to Amateur Television - Part 1 QST April 1993, pp. 19-23

http://www.arrl.org/files/file/Technology/tis/info/pdf/49319.pdf

➢ An Introduction to Amateur Television - Part 2 QST May 1993, pp. 43-47

http://www.arrl.org/files/file/Technology/tis/info/pdf/59343.pdf

➢ An Introduction to Amateur Television - Part 3 QST June 1993, pp. 35-41

http://www.arrl.org/files/file/Technology/tis/info/pdf/69335.pdf

➢DVB-T A Solution for ARES Television Operations QST June 2015 pp. 42-44

http://www.arrl.org/files/file/Technology/tis/info/pdf/ARESTVOPJune2015QST.pdf

EH

http://www.arrl.org/files/file/Technology/tis/info/pdf/49319.pdfhttp://www.arrl.org/files/file/Technology/tis/info/pdf/59343.pdfhttp://www.arrl.org/files/file/Technology/tis/info/pdf/69335.pdfhttp://www.arrl.org/files/file/Technology/tis/info/pdf/ARESTVOPJune2015QST.pdf

SSTV Calling FrequenciesFour Principle HF Analogue Channels

➢ 14.230 usb

➢ 10.132 usb (Narrow modes such as MP73N)

➢ 7.171 lsb

➢ 3.845 lsb

Three Principle HF Digital Channels➢ 14.233 usb

➢ 7.058 lsb

➢ 3.733 lsb

EH

Copthorne “Cop” MacdonaldCreator, SSTV

Russian Dark Side of Moon Gordon Cooper

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Cop Macdonald

Cop Macdonald VE1BFL1936-2011

SSTV image captured by Will Marchent KW4WZ 2019 Jan 4 20:49 Expedition 58 - ARISS Series 12

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SSTV Analogue SSTV Digital

Hellschreiber FAXVarious Modes EH

Additive Color Model

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MMSSTV Analogue Software

https://hamsoft.ca/pages/mmsstv.php

EH

https://hamsoft.ca/pages/mmsstv.php

EasyPal Digital Software

http://www.g0hwc.com/sstv_drm_news.html

EH

http://www.g0hwc.com/sstv_drm_news.html

But I Need Hardware Also

EH

World SSTV Cam’s

www.worldsstv.com

EH

http://www.worldsstv.com/

Transitioning…Older to Newer to Exotica

EH

So You Want Your Pictures to Move and Dance

https://www.youtube.com/watch?v=5WqqeEgHtlw

Digital TV (In-depth)

Jim KH6HTV & Don N0YE

https://kh6htv.files.wordpress.com/2015/08/hd-amateur-dtv2.pdf

Streaming Video by VK3RTV

EH

https://www.youtube.com/watch?v=5WqqeEgHtlwhttps://kh6htv.files.wordpress.com/2015/08/hd-amateur-dtv2.pdf

Slow Scan on 30 Meters: The Debate

http://www.wb9kmw.com/WB9KMW/tutorial/article_N-SSTV_30m.pdf

EH

http://www.wb9kmw.com/WB9KMW/tutorial/article_N-SSTV_30m.pdf

SSTV – How it works

• What happens• Every different pixel in an image is assigned a brightness and color value.

• Pixel’s brightness and color value is assigned a corresponding audio frequency.

• Line of picture is scanned left to right and each pixel’s audio frequency is fed from sound card to transmitter.

• Receiving station reverses process to convert audio frequencies back to colors and brightness to reproduce picture line by line.

• Many modes are available for transmit• usual time is 10 seconds for B&W and 110 seconds for color

• 300 millisecond calibration header sent before image tells receiving radio/computer/software what mode is being sent with automatic mode selection

• Noise is a big issue is SSTV transmissions

DD

SSTV – How it worksPixel scan (left to right)

MMSSTV Software

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SSTV – How it worksPixel scan (left to right)

Brightness and color ofcurrent pixel being scanned is assigned an audio tone

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SSTV – How it works

Pixel’s digital audio tone

Soundcard converts to audio

Audio is transmitted

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SSTV – How it works – receiving station

DD

Some common modes of transmissionFamily Developer Color Lines Time

Amiga Video Transceiver

Ben Blish-Williams AA7AS

B&W and RGB

128X128256X128128X256256X256

8, 16, 32, 48, 96, 114 seconds

Martin Martin EmmersonG3OQD

RGB 240X240 58, 114 seconds

Robot Robot SSTV Corp.

YUV, BW, RGB

128 luma, 32/32 or 64/64 chroma X 120 or 240

8, 12, 32, 36, 72 seconds

Scottie Eddie MurphyGM3SBC

RGB 240X240 71, 110 seconds

DD

FTP widget and WorldSSTV Webcam

• WorldSSTV.com

• Qsl.net provides every ham with a web page to which pics can be loaded from computer and reloaded to worldsstv.com

• Requires html editor to setup qsl.net picture load and indexing

DD

MMSSTVTX Mode

Pics and templates

Log and template macros

Setup and radio command

Lots of Rig specific TX and RX settings –TAKE YOUR TIME DD

Setup3 tabs - RX/TX/Misc

Squelch level

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SetupTX

Digital output level

CW ID

RadioCommand button

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SetupRadioCommand

Port

Baud rate and data transfer requirements for your radio

Port hexadecimal CI-V addressxx = ???

CW ID

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SetupMisc

Sound card

History

DD

Links/References Technical➢ Amateur Television Quarterly https://atvquarterly.com/

➢ ARISS Gallery https://www.spaceflightsoftware.com/ARISS_SSTV/index.php

➢ ARISS SSTV http://ariss-sstv.blogspot.com/

➢ ARRL http://www.arrl.org/files/file/Technology/tis/info/pdf/99753.pdf

➢ British Amateur Radio Club Home https://batc.org.uk/

➢Civil Air Patrol http://www.cap-es.net/es%20electric%20technology/CAP%20Slow%20Scan%20TV.htm

➢CQ TV British Amateur Television Club #1 https://batc.org.uk/wp-content/uploads/cq-tv1.pdf

➢CQ TV British Amateur Television Club #161 https://batc.org.uk/wp-content/uploads/cq-tv161.pdf

➢CQ TV British Amateur Television Club #252 https://batc.org.uk/wp-content/uploads/cq-tv252.pdf

➢Getting Started with Slow Scan Television http://www.arrl.org/files/file/Technology/tis/info/pdf/99753.pdf

➢ Image Communications on Shortwave Waves http://www.sstv-handbook.com/download/sstv-handbook.pdf

➢ ISS Slow Scan https://amsat-uk.org/beginners/iss-sstv/

➢Mother Earth News https://www.motherearthnews.com/nature-and-environment/slow-scan-tv-zmaz77mazbon

https://atvquarterly.com/https://www.spaceflightsoftware.com/ARISS_SSTV/index.phphttp://ariss-sstv.blogspot.com/http://www.arrl.org/files/file/Technology/tis/info/pdf/99753.pdfhttps://batc.org.uk/http://www.cap-es.net/es%20electric%20technology/CAP%20Slow%20Scan%20TV.htmhttps://batc.org.uk/wp-content/uploads/cq-tv1.pdfhttps://batc.org.uk/wp-content/uploads/cq-tv161.pdfhttps://batc.org.uk/wp-content/uploads/cq-tv252.pdfhttp://www.arrl.org/files/file/Technology/tis/info/pdf/99753.pdfhttp://www.sstv-handbook.com/download/sstv-handbook.pdfhttps://amsat-uk.org/beginners/iss-sstv/https://www.motherearthnews.com/nature-and-environment/slow-scan-tv-zmaz77mazbon

Links/References Technical➢NASA ISS https://spaceflight.nasa.gov/station/reference/radio/

➢Popular Electronics http://www.rfcafe.com/references/popular-electronics/slow-scan-tv-challenge-popular-electronics-august-1973.htm

➢RTL-SDR https://www.rtl-sdr.com/tag/slow-scan-television/

➢SSTV Audio https://www.youtube.com/watch?v=xxIzA6uEkcU

➢SSTV Modes http://www.g0hwc.com/sstv_modes.html

➢SSTV Signal ID https://www.sigidwiki.com/wiki/Slow-Scan_Television_(SSTV)

➢SSTV Software https://www.dxzone.com/best-sstv-software/

➢SSTV Software https://medium.com/@daniellaperrysiegel/best-sstv-software-7a9d81ccafab

➢Tech Minds https://www.youtube.com/watch?v=vRwH0FlH9MA

➢Software Help Files

https://spaceflight.nasa.gov/station/reference/radio/http://www.rfcafe.com/references/popular-electronics/slow-scan-tv-challenge-popular-electronics-august-1973.htmhttps://www.rtl-sdr.com/tag/slow-scan-television/https://www.youtube.com/watch?v=xxIzA6uEkcUhttp://www.g0hwc.com/sstv_modes.htmlhttps://www.sigidwiki.com/wiki/Slow-Scan_Television_(SSTV)https://www.dxzone.com/best-sstv-software/https://medium.com/@daniellaperrysiegel/best-sstv-software-7a9d81ccafabhttps://www.youtube.com/watch?v=vRwH0FlH9MA

Links/References Amateurs➢G0HWC http://www.g0hwc.com/index.html

➢ J39BS http://www.j39bs.webqth.com/sstvstationsetup.html

➢K6MFW http://www.mfwright.com/ATVpresentation.pdf

➢KB6NU https://www.kb6nu.com/sstv-live/

➢KD2BD https://www.qsl.net/kd2bd/sstv.html

➢KH6HTV https://kh6htv.files.wordpress.com/2015/08/hd-amateur-dtv2.pdf

➢KJ4YZI https://www.youtube.com/watch?v=ojTcM2NGO48

➢KO6KL http://www.valleymedia.org/sstv/

➢N4SPP https://www.nonstopsystems.com/radio/frank_radio_sstv.htm

➢N6NA http://www.n6na.org/nets/sstv-net?tmpl=%2Fsystem%2Fapp%2Ftemplates%2Fprint%2F&showPrintDialog=1

➢N-SSTV Group https://narrowsstv.wordpress.com/

➢WA8LMF http://wa8lmf.net/aprn/

➢WA9TT http://www.wb9kmw.com/WB9KMW/live_SSTV.html

➢WB9KMW http://www.wb9kmw.com/WB9KMW/sstv_files/tutorial/SSTV_tutorial.pdf

➢WD0AKX https://www.youtube.com/watch?v=XOh2IGU9Vfk

http://www.g0hwc.com/index.htmlhttp://www.j39bs.webqth.com/sstvstationsetup.htmlhttp://www.mfwright.com/ATVpresentation.pdfhttps://www.kb6nu.com/sstv-live/https://www.qsl.net/kd2bd/sstv.htmlhttps://kh6htv.files.wordpress.com/2015/08/hd-amateur-dtv2.pdfhttps://www.youtube.com/watch?v=ojTcM2NGO48http://www.valleymedia.org/sstv/https://www.nonstopsystems.com/radio/frank_radio_sstv.htmhttp://www.n6na.org/nets/sstv-net?tmpl=/system/app/templates/print/&showPrintDialog=1https://narrowsstv.wordpress.com/http://wa8lmf.net/aprn/http://www.wb9kmw.com/WB9KMW/live_SSTV.htmlhttp://www.wb9kmw.com/WB9KMW/sstv_files/tutorial/SSTV_tutorial.pdfhttps://www.youtube.com/watch?v=XOh2IGU9Vfk

73David Day N1DAY Ernie Hollingsworth KC4SITdavidday@yahoo.com kc4sit@gmail.com

mailto:davidday@yahoo.commailto:kc4sit@gmail.com