Tillägg till Digitalspalten HF, QTC Nr 4 – 2018

arti

I aprilnummret av QTC Amatörradio publicerade jag en artikel hur man själv kan bygga ihop en fristående WSPR-station med en Raspberry Pi. Då en uppdatering av Raspbian Stretch, utgåva 2018-03-30, släppts strax före utgivningen av artikeln i QTC finns det tillägg till anvisningen som behövs för att installationen skall bli lyckad. Med den nya versionen kan inte mjukvaran dirmngr installeras då installationspaketen fattas.

För att anvisningen skall fungera har jag därför gjort ett tillägg till anvisningen som du hittar här. Artikeln i QTC hittar du här. Vidare kommer även WSJT-X Version 1.9.0 RC3 att installeras istället för V 1.8.0 som artikeln anger.

Tack till Tommy, SM6NZB som uppmärksammade mig på detta! 🙂

73 de SM7VRZ

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New Release candidate for WSJT-X available.

wsjtx rc2

Today the development team and K1JT announced that there is a new release candidate for WSJT-X available for download on the WSJT-X homepage. As usual there is a number of installation packages for multiple platforms available.

As this is a release candidate and not a complete release all users are encouraged to report any problems or bugs to the development team.

So what´s new in WSJT-X 1.9.0-RC2? The release notes from Joe, K1JT revels for example the following improvements:

  • A new FT8 DXpedition mode to wich makes it possible to have high QSO rates in pileup situations.
  • Decoding improvements for JT65 along with optional auto sequencing function for JT4, JT65 and JT9 in VHF/UHF/Microvawe mode. For JT65 also a priori (AP) decoding is available when using this mode.
  • Further improvement of the AP decoding in FT8 and minor adjustment to auto-sequencing behaviour.
  • Improved waterfall sensitivity for very weak signals. Adjustment of waterfall properties regarding gain and zero level are also directly affecting the entire waterfall, including the historical traces.
  • An automatic and real-time forwarding of logged information to N1MM Logger+ is also implemented.
  • improvement and expansion of UDP messages that are sent to companion software, for example JTalert and others.

Regarding the DXpedition mode, all station using this mode must use WSJT-X 1.9.0 at both ends to work! Instructions for how to work this mode can be found here:

http://physics.princeton.edu/pulsar/k1jt/FT8_DXpedition_Mode.pdf

Please, do report any bugs or anomaluos behaivur to the development team!

73 de SM7VRZ

WSJT-X 1.8.0 GA Released

Yesterday evening, SNT, K1JT announced through the development groups e-mail reflector that the GA-version of WSJT-X 1.8.0 had been released. The changes from the RC3 version was only minor things and a full list of changes can be found in the release notes.

wsjtx180ga

To download WSJT-X 1.8.0, visit the WSJT-webiste.

The job of doing the Swedish translation of the manual will now commence and hopefully I will release it within a two month period.

73 de SM7VRZ

 

 

WSJT-X 1.8.0-RC3 släppt

Igår vid 22-tiden svensk  tid meddelande K1JT och utvecklargruppen bakom WSJT-X att en ny Release candidate har släppts till allmänheten. Användare av RC 2 rekommenderas att uppgradera för att få  tillgång till alla nya funktioner och uppdateringar som skett. RC3 finns tillgänglig på WSJT-projektets hemsida för nerladdning. 

Man har också meddelat att ett släpp av den riktiga 1.8.0-versionen är tänkt att släppas inom kort. 

Detta gör även att den svenska översättningen av användarmanualen för RC2 behöver uppdateras dock inväntas den kompletta engelska manualen före den slutgiltiga översättningen kommer att ske. Min förhoppning är att kunna släppa den svenska översättningen några veckor efter den engelska utkommit. 

73 de SM7VRZ 🙂

New release candidate for WSJT-X

The development team behind WSJT-X announced the new release candidate for WSJT-X version 1.8.0 (WSJT-X 1.8.0 rc1) for about two weeks ago. Since then, more and more users are “upgrading” to the new RC-version exploring the new exciting functions that have been developed.

180rc1

The greatest attention has undoubtedly been the new mode FT8, Franke Taylor 8-FSK modulation. Since the release the number of stations working FT8 has been growing immensely on the bands. The supporting software, JTAlert by VK3AMA, have also been updated to support the new mode.

The new mode have been developed by K1JT and K9AN and uses 15sec TX/RX-sequences. Compared to JT65/9:s 60sec this means it´s about 4 times faster. Because of this, the modes puts the operators timing skills to the test and requires a much more quicker operating style than JT65/9. But don’t worry, the software has a built in auto-sequencing function that will help you with the fast maneuvers required. The message structure is similar to the other JT-modes and the normal JT65 user will find it familiar right away.

The list below summarizes more details on the FT8-mode (according to release note):

  • 15 sec T/R-sequence length.
  • 75 bit messages length + 12 bit CRC.
  • LDPC FEC-code.
  • 8-FSK modulation with 6.25 Hz tone spacing.
  • Constant-envelope waveform.
  • 50 Hz bandwidth.
  • 7×7 Costas array synchronization at start, middle and end.
  • 12.64 sec transmission duration.
  • -20dB decoding threshold. With the forthcoming “AP” decoding some extra dB:s will be possible.
  • Multi decoder to decode signals i passband, just as in JT65. Multipass decoder possibility is under development.
  • Auto sequencing (optional) as well as optional auto reply function when sending CQ.

More functions are being developed and as usual the input from the users is an important factor for enhancing the operating experience. Hopefully there will be an second release candidate some time soon so more exciting functions will be available.

If you would like to download the release candidate, click here and choose the correct package for you platform.

Regarding the user guide, the work with translating it to Swedish is under way. However a release date for the user guide is not available for the moment.

73 de SM7VRZ

Release of WSJT-X V1.7.0

wsjtx170Just a few minutes ago the new release of WSJT-X, V1.7.0, was released by K1JT, Joe on the WSJT-homepage. The new version contains a lot of new functions an modes but the most useful update for us using the software on the HF-bands is the new Franke-Taylor decoder. This decoder replaces the Koetter-Vardy decoder used in previous WSJT-X versions. The KVASD is no longer necessary to install. In addition to this there is now multi-pass decoding which is very helpful in the crowded JT65-frequencies. The function uses two decoding passes instead of one, increasing the possibility to decode overlapping transmissions or weaker stations buried in a crowded passband.

Download the installation package for windows now from the WSJT-X website or click here to start the download.

Installation packages for Mac and Linux is also available on the WSJT-X website.

The Swedish translation of the user guide is not yet ready for release but will be finished in the first quarter of 2017.
Have fun! 😀

73 de SM7VRZ

Presentation – Bockebodaträffen 2016

I detta inlägg har jag lagt upp en länk till det presentationsmateriel som jag använde under föredraget om Digitala trafiksätt på HF under Bockebodaträffen den 18/6. Jag vill tacka alla som lyssnade på min presentation och jag hoppas att jag inspirerat er till att börja titta mer på digitala moder på HF!

En PDF kopia på presentationen hittar ni här.

73 de SM7VRZ