DATV News
New look
August 2023 - Added a 'dark' theme. This is now the default, but it can be changed back to 'light'.
New address
August 2022 - the URL for this site has changed to https://cq-datv.ianp.uk due to the immanent expiry of the current domain name.
Moved
February 2022 - This site has now been moved to a new server. (which did not go as smoothly as had hoped!)
Deceased!
October 2021 - CQ-DATV has now ceased publication. The editorial team would like to thank all those who contributed articles for our 100 issues.
Updated
June 2021 - The whole site has now been updated to use the Bootstrap version 5 framework.
If you notice any problems, or anything that does not work as expected, then please email the editor at [email protected]
Articles search
October 2019 - Now that we have all articles/authors in a database to enable production of the CQ-DATV Index, we can use this database to enable a search facility.
Articles Search
All our yesterdays!
New and improved
March 2018 - The cq-datv.mobi web site has been moved to a new hosting company that provides us with a SSL certificate so that all connections are now secure using the https protocol. As well as being encrypted, this protocol is much more robust and should improve downloads for people on poor internet connections.
Keep up to date
If you would like to be advised when the next issue of CQ-DATV is available for download, then join our announce mailing list at http://cq-datv.mobi/list.php (This same address will also allow you to unsubscribe in the unlikely event that should you wish to)
Note: Your email address will NOT be passed on to any other organisations and will only be used to announce the availability of a new issue of CQ-DATV.
Broken DX record!
| Known Digital-ATV DX Records, updated 2017-06-01 by Ken W6HHC | ||
|---|---|---|
| 24 GHz | ||
| 124 KM | JA6DME & JA6EES | 2011‐11‐12 |
| Locations Mont Ten‐Zan and Mont Ge‐Zan | ||
| 10 GHz | ||
| 450 KM | HB9JBC & F4CXQ | 2005‐06‐21 |
| Locations JN40CT (Sardinia) and JN12OH (Spain) | ||
| 93 KM | G8GKQ & G8GTZ | 2016-07-05 |
| H.264 video - DVB-S protocol at 333 KSymb/s FEC=7/8. G8GKQ used RPI and DigiThin at 250 mW. G8GTZ used PIPO and DATV-Express at 3W. | ||
| Locations IO80WP (Povington Hill near Lulworth) and IO91GI (Walbury Hill) | ||
| 32 KM | G8GKQ & G8GTZ | 2016-06-23 |
| H.264 video - DVB-S protocol at 333 KSymb/s FEC=7/8. G8GKQ used RPI and DigiThin at 200 mW. G8GTZ used PIPO and DATV-Express at 5W. | ||
| Locations IO91JA (Lane End) and IO91JH (Hannington) | ||
| 5.7 GHz | ||
| 341 KM | JL1BLF & JH1GED | 2011‐08‐06 |
| Locations Mont Chokai‐san and Mont Kashimayari‐gatake) | ||
| 2.4 GHz | ||
| ~ 1000 KM | OR4ISS to IØKPT (one-way) | 2014-03-08 |
| ~ 1000 KM | OR4ISS to IK1SLD (one-way) | 2014-03-08 |
| Initial DVB-S protocol live video transmissions from HamTV in orbit aboard ISS SR = 1.34 MSymb/sec and 2.0 MSymb/s using SR-Systems exciter & MPEG2 | ||
| Locations Orbit to Matera, Italy and also Orbit to Casale Monferrato, Italy | ||
| 252 KM | JA6SPI & JA5MFY | 2009‐11-03 |
| Locations ?? | ||
| 1.2 GHz | ||
| 440 KM | G4KLB to G1LPS | 2010‐10‐11 |
| Locations IO90BR and IO94EQ | ||
| (tropospheric ducting ‐ one‐way DATV) | ||
| 419 KM | G4KLB & MØDTS | 2010‐10‐11 |
| Locations Bournemouth, England and Yarm, England | ||
| (tropospheric ducting) | ||
| 379 KM | VK3RTV(RPTR) & VK7EM | 2011‐02‐23 |
| Locations Mount Dandenong, Victoria and Penguin, Tasmania | ||
| (operators VK3BFG, VK3DQ , VK3WWW and VK3TRX) | ||
| 252 KM | JA5GYU & JA6JNR | 2009‐11-03 |
| (1 Watt) | ||
| 70 CM | ||
| 696 KM | F1FY to G8GTZ | 2013‐09‐24 |
| (DVB‐S 2MS/sec FEC=1/2 ‐ ‐ one way reception) | ||
| 696 KM | G8GTZ to F1FY | 2013‐09‐25 |
| (DVB‐S 2MS/sec FEC=1/2 ‐ ‐ one way reception reported by FM) | ||
| Locations IO91KH (near Basingstoke) and JN16VB (near Roanne, France) | ||
| 600 KM | DBØTAN (repeater) to F9ZG | 2014-11-28 |
| DVB-S - one-way DATV - Tropospheric ducting (signal 25 dB S/N over ca) Locations Wasserkuppe (Hesse state, Germany) to IN99KC (Normandy, France) | ||
| 528 KM | G3PYB & F5AGO | 2013‐09‐24 |
| (DVB‐S 2MS/sec) | ||
| Locations near W YORKSHIRE and JN06DP (near Poitiers, France) | ||
| 501 KM | W4HTB & WB8LGA | 2014‐07‐26 |
| (DVB-T QPSK FEC=1/2 2 MHz Bandwidth) - Tropospheric ducting | ||
| Locations Bowling Green, KY and Marengo, OH | ||
| 235 KM | G8GTZ & F9ZG | 2016‐06-12 |
| H.264 video - DVB-S protocol at 125 KSymb/s using DATV-Express w/ 19-ele yagi | ||
| Locations JO00HU (Fairlight near Hastings) and IN99KC (near Cherbourg) | ||
| 121 KM | KH6HTV to KØRZ | 2011‐11-21 |
| (video resolution HDTV 1080i ‐ protocol ITU‐T/J.83B QAM‐64 ‐ one‐way DATV) | ||
| Locations Cheyenne, Wyoming and Boulder, Colorado | ||
| 144 MHz | ||
| 294 KM | G0MJW/A & G8LES | 2016-12-29 |
| tropo-ducting - H.264 video - DVB-S protocol at 125 KSymb/s with DATV-Express and 9-ele yagi at GØMJW. G8LES also used DATV-Express with 10-ele X-yagi. Both produced 25W ERP. - on 146.5 MHz - UK temporary band allocation | ||
| Locations IO83RO (Winter Hill) and IO91LC (Four Marks) | ||
| 281 KM | G8GTZ & G0MJW/A | 2016-12-29 |
| tropo-ducting - H.264 video - DVB-S protocol at 125 KSymb/s with DATV-Express and 9-ele yagi at G8GTZ. GØMJW also used DATV-Express with 9-ele yagi. Both produced 25W ERP. - on 146.5 MHz - UK temporary band allocation | ||
| Locations IO91KF (near Basingstoke) and IO83RO (Winter Hill) | ||
| 237 KM | F3YX to F9ZG | 2011-11-09 |
| DVB-S protocol at 1000 KSymb/s using modified SR-Sys MiniMOD (one-way) on 145.0 MHz experimental license 5-Minute max | ||
| Locations JN18AP (near Limours, France) to IN99KC (near Cherbourg, France) | ||
| 195 KM | GW8VPG & G8GTZ | 2016‐12-11 |
| DVB-S/H.264-video protocol at 333 KS/s - GW8VPG using DATV-Express w/ 9-ele G8GTZ also used DATV-Express w/ 9-ele yagi on 146.5 MHz - UK temporary band allocation | ||
| Locations IO81LS (Blorenge Mountain in South Wales) and IO90JO (Isle of Wight) | ||
| 50 KM | MØDTS & G1LPS | 2015‐02-21 |
| H.264 video - protocol DVB-S at 333 KSymb/s using experimental DATV-Express on 146.5 MHz - UK temporary band allocation | ||
| Locations North York Moors, England and Spennymoor (County Durham), Eng | ||
| 50 MHz | ||
| 64 KM | G8ADM to G8LES | 2015‐02-10 |
| DVB-S protocol at 1.133 MSymb/Sec with FEC=3/4 (one-way) on 51.2 MHz using 200W avg Pwr Out and BW approx 1.5 MHz | ||
| Locations North of Harrow (IO91TO) to North of Alton in Hampshire | ||
| See more details at www.von-info.ch/hb9afo/records/recordse.htm | ||
Improved
Due to the popularity of the pdf version of issue 7, it has been decided to produce a properly formatted pdf version, as well as the usual ones, from issue 8 onwards.
ISS to transmit DATV
The international space station is planning DATV transmissions on 13cms. Full details have not yet been formally released by ESA and ARISS but some details are available here.
http://www.amsat.org.uk/iaru/
CQ-DATV can be read on a PC
For those of you that want to read CQ-DATV on a PC, download the ePub file and then go to https://play.google.com/books and drag the file into "my books" it will upload and you can then read it in your browser without any additional software.
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