FT8

[9A7YY]

Još jedan mode za puniti dxped proračun. ;-)

[9A2JK]

Danas smo Štef, 9A5F i ja, napravili jedan mali eksperiment. Oko 13:00 LT na pustom bandu,
80 m, radili smo FT8 QSO, uz različite snage TX-a.

9A5F emitira sa 5 W, kod mene se uredno i lijepo dekodira uz raporte od -15 dB i slabije,
ali ga ja na uho ne čujem. Band je pust, nigdje nikakvih signala koji bi ometali eksperiment.
Ja čujem samo šum, ništa više !!!

Uz mnogo veću snagu, sve do 1 kW, njegov signal se jednako dobro dekodira.
Primijetite da je i uz ovakvu ogromnu snagu, signal i dalje čist!

73
Martin 9A2JK

[9A5N]

FT8 ne treba slušati nego gledati na "vodopadu".

Poigrajte se klizačima i pokušajte vodopad podesiti da na njemu vidite što više slabih signala kako ih nebi "nagazili" svojim signalom.
Nažalost, to se često događa a najveći krivac je loše podešen vodopad.

Na slikama je usporedba vodopada i dekodiranja između JTDX i WSJT.

[9A2JK]

Svrha ovoga našega eksperimenta bila je malo u stilu ''nevjernog Tome''.
Htjeli smo se uvjeriti da će WSJT-X dekodirati signale koje naše ''telegrafske'' uši ne čuju.
I uvjerili smo se.

Neno, hvala na savjetu.
Događa se da ljudi misle kako je frekvencija čista i onda pozivaju preko drugih.
Uz malo poigravanja sa vodopadom možemo si puno pomoći.

73
Martin 9A2JK

[9A6W]

Citat:

Hi all,

I write to remind you of the public test of *FT8 DXpedition Mode*
scheduled for March 6-7. The more participants, the better!
The main goal is to simulate pileups in which many "Hounds" call and
attempt to work a desirable rare DX station, the "Fox", and to maximize
the resulting QSO rate. We hope you can be there and work each of our
Foxes on each band.

All participating stations must use program version WSJT-X v1.9.0-rc2.
If you don't yet have it, download links are available here:
https://physics.princeton.edu/pulsar/k1jt/wsjtx.html

Detailed instructions for Fox and Hound stations are posted here:
http://physics.princeton.edu/pulsar/k1jt/FT8_DXpedition_Mode.pdf
It's important to read and follow these instructions carefully! Don't
just try to wing it.

Each hour during the test has a designated frequency and Fox callsign,
"Fox_A" in the following table.

Date UTC Freq Fox_A Fox_B NSlots
-------------------------------------------
Mar 6 2300 14.080 K1JT W7/KH7Z 3
Mar 7 0000 10.141 W1/KH7Z K9AN 5
Mar 7 0100 7.080 W7/KH7Z K1JT 4
Mar 7 0200 3.585 K9AN W1/KH7Z 3

As you will know after reading the FT8 DXpedition Mode User Guide, Fox
can conduct up to "NSlots" QSOs simultaneously. W1/KH7Z will be
operated by AA7A, and W1/KH7Z by N1DQ.

Fox_A will operate for the full hour if plenty of Hounds keep calling.
Fox_B is on standby reserve. If the QSO rate for Fox_A approaches zero
at the half-hour mark, Fox_A will stop transmitting and Fox_B will call CQ.

If you (as a Hound) can legitimately use more than one callsign -- your
spouse's call, club call, etc. -- please try to work each Fox multiple
times. No dupe QSOs with the same call and same band, though.

Real-time liaison will be available via the "Ping Jockey Relief" chat
page (PJB), https://www.pingjockey.net/cgi-bin/pingtalkB . Everyone
should monitor this page for possible announcements of frequency changes
or switch-overs from Fox_A to Fox_B. To ensure that announcements from
Fox stations are easily visible, Hounds should monitor PJB but not post
messages there during the test.

The deepest pileups will help us to tune the final-release software
version for optimum performance on both Fox and Hound sides. After the
test, please post any comments you feel will be helpful to one of our
two email forums, wsjtgroup@yahoogroups.com or
wsjt-devel@lists.sourceforge.net . You will need to be subscribed to
the list in order to post there.

We sincerely hope you can join us for this test, working each Fox on
each band!

-- 73, Joe, K1JT (for the WSJT Development Group)

Kraj citata

73
Dragan 9A6W

[9A2JK]

Prošlo je testiranje FT8 DXpedition moda. Ja lisicu na 20 m nisam čuo, pardon nisam vidio,
ali zato je na 30 m signal bio odličan. Izgleda da je bilo zbunjenosti među lovcima (uključujući
i mene), ali važno da je bilo puno lovaca, prava gužva i nadam da je test uspio.
Uglavnom to je izgledalo kao na slici.

Na 30 m lisica koja je glumila DX ekspediciju bio je W1/KH7Z koji je emitirao na pet frekvencija
istovremeno (petorici lovaca), a mi smo pozivali na frekvencijama iznad 1000 Hz. Sa slike se
vidi da 9A2JK poziva na 1470 Hz. W1/KH7Z odgovara na moj poziv i daje mi raport -06.
Po primitku raporta moj softver automatski prebacuje moju TX frekvenciju na 627 Hz (po
protokolu ispod 1000 Hz) i šalje R-17 (potvrda prijema i njegov raport). W1/KH7Z potvrđuje
prijem mojega raporta i šalje mi RR73 i (u istoj predajnoj sekvenci) šalje raport drugom lovcu.
Po primitku RR73 ja logiram QSO – veza završena ''brzinom munje'', jedva da sam vidio što
se događa na ekranu. Sreća da sam  uhvatio ekran, pa je ostala slika za analizu.

Sad je na developerima programa da isprave eventualne bugove i to sve izglancaju.
Čini mi se da ima prostora za poboljšanja.

73
Martin 9A2JK

[9A2JK]

TY7C radi FT8 u DXPedition modu.
Rađen jutros na 21070 kHz sa 20 W.

Softver: WSJT-X v1.9.0-rc2

Za rad u DXPedition modu prvo treba dodati radnu frekvenciju, jer se DX ekspedicije rade
na drugim frekvencijama, ne na onima za normalan FT8 rad.
TY7C su objavili da će FT8 raditi 4 kHz niže od FT8 frekvencija.

Prvo sam u program upisao novu frekvenciju 21070 kHz (File – Settings – Frequencies,
desna tipka miša – Insert  i u polje Frequency (MHz): upisao 21,070 SA ZAREZOM.

U Settings – Advanced stavio kvačicu na Hound.

Izabrao novu radnu frekvenciju i malo poslušao.

TY7C se krasno vidi na 238 (239) Hz.

Ostalo se vidi sa ekrana.
Ja pozivam na 1351 Hz.
Nakon samo trećeg poziva TY7C odgovara sa raportom -09.
Softver moj TX automatski prebacuje na 810 Hz (po protokolu negdje ispod 1000 Hz)
Ja na 810 Hz potvrđuje raport i šaljem R+03
TY7C potvrđuje sa RR73 i u istoj sekvenci poziva drugu stanicu.
QSO završen, logiran.

73
Martin 9A2JK

[9A6W]

Citat:
Everyone paying attention should already know what's contained in this
message -- but it's clear that some do not.

The current General Availability (GA) release of WSJT-X is v1.8.0. That
program version does not include FT8 DXpedition Mode.

We have made beta-level "release candidates" available for the explicit
purpose of testing FT8 DXpedition Mode. The release candidates have
included cautionary warnings to the effect that in its present form,
DXpedition Mode should be used only for controlled testing.

A few operators or groups have ignored our warnings and tried to use FT8
DXpedition Mode in true pileup situations. The consequences are
predictably bad -- especially when the offending operator(s) have chosen
their frequencies badly and other operators are using a mix of program
versions including v1.8.0, v1.9.0-rc2, v1.9.0-rc3, some version of JTDX.

FT8 DXpedition Mode is not yet ready for "production" use. Until WSJT-X
v1.9.0 is fully released -- not a beta-level "release candidate", but a
full General Availability release -- DXpedition Mode should be used only
in controlled test situations.

The next public test of FT8 DXpedition Mode conducted by the WSJT
Development Group will be conducted on April 7, a little over a week
from now. You are cordially invited to join us for this test. See the
announcement posted here yesterday (Subject: WSJT-X v1.9.0-rc3: Testing
of FT8 DXpedition Mode) for details.

-- 73, Joe, K1JT

Kraj citata.
73
9A6W

[9A2JK]

Odličnu prezentaciju WSJT-X i FT8 koju je održao
Dr. Joe Taylor, K1JT, na MicroHAMS Digital Conference 2018,
možete pogledati na YouTube:

https://www.youtube.com/watch?v=233HQs_8JGQ

73
Martin 9A2JK

[9A2JK]

Prošao je i drugi FT8 DXpedition test.
Lisice, W1/KH7Z i W7/KH7Z su istovremeno emitriale pet signala, pet QSO-a u jednoj sekvenci.
W7/KH7Z je u sat vremena napravio 175 različitih znakova, ali samo nekoliko EU.
W1 je bilo lako odraditi.

Izgleda da još uvijek ima bugova, ali glanca se, glanca. 
Biti će zanimljivo raditi u pravoj ekspediciji.

73
Martin 9A2JK

[9A6W]

Citat:
The WSJT Development Group is pleased to announce a fourth Release Candidate for WSJT-X Version 1.9.0.

A third beta release, v1.9.0-rc3, has been tested in the field over the past several weeks. These tests included a public test of FT8 DXpedition Mode conducted on April 7. A few additional bugs were identified and corrected, and the -rc4 release also includes some minor enhancements.

A General Availability (GA) release of WSJT-X Version 1.9.0 will be announced at a suitable time, probably in the near future. After that you should stop using any -rc# release candidate.

Short list of changes since WSJT-X Version 1.9.0-rc3:

1. Corrected several flaws in Fox and Hound behavior, FT8 DXpedition Mode

2. Decoded CQ messages where a prefix has been used as a suffix now have the DXCC entity name assigned correctly in almost all cases

3. Improved AFC capability for the wider JT65 sub-modes to help with drifting signals

4. Better support for macOS using hi-DPI Retina displays

5. New UDP message that allows external applications to highlight decoded callsigns

6. Main-screen geometry and state of the "splitter" setting between its two text windows is now properly restored after program restart

7. New simulator jt49sim[.exe] replaces jt4sim and jt9sim

8. Correct S/N measurements for the JT9 slow/wide submodes

9. Other minor bug fixes

10. Updated copy of cty.dat

###############################################################################
*Third Public Test of FT8 DXpedition Mode*
------------------------------------------

If you decide to install v1.9.0-rc4, please help us by participating in the third public test of FT8 DXpedition Mode scheduled for Saturday, May 5. Once again, the goal is to simulate a rare-DXpedition pileup by
having many stations ("Hounds") calling and trying to work a designated pseudo-DXpedition station ("Fox").

Everyone participating in the test must use WSJT-X v1.9.0-rc4. In addition, you must read, understand, and carefully follow the instructions posted here:
http://physics.princeton.edu/pulsar/k1jt/FT8_DXpedition_Mode.pdf
Please be sure to read this document carefully, again. Some details of the operating procedures are different from previous versions.

If you have legitimate access to more than one callsign (spouse, a club call, or whatever) please feel free to call and work each Fox more than once. The more Hounds, the better: we want the test pileup to be as
deep as possible.

The third public test will take place as follows, with each session lasting one hour:

Date UTC Frequency Fox Callsign Operator
---------------------------------------------------
May 5 1400 14.090 MHz W1/KH7Z N1DG
May 5 1500 14.090 W7/KH7Z AA7A
May 5 1600 14.090 K1JT K1JT

If last-minute instructions are necessary they will be announced on the
"Ping Jockey Relief" chat page:
http://www.pingjockey.net/cgi-bin/pingtalkB

As we have done before, we will plan to publish lists of all Hound callsigns copied and those worked by each Fox.
###############################################################################

Installation packages for WSJT-X v1.9.0-rc4 on Windows, Linux, Macintosh, and Raspian Jessie have been posted on the WSJT web site here:
http://physics.princeton.edu/pulsar/k1jt/wsjtx.html

Scroll down to the bottom of the page to find a link to the installation package for your system.

You can also download the packages from our SourceForge site:
https://sourceforge.net/projects/wsjt/files/

Please report your test results and any problems to one of the email lists wsjt-devel@lists.sourceforge.net or wsjtgroup@yahoogroups.com. You must be a subscriber in order to post to these lists.

-- 73 from Joe, K1JT, for the WSJT Development Group
__._,_.___
Kraj citata.
73
9A6W

[9A2JK]

U temi ''Uvod u FT8'' - pokrenuli ste rasprava o novinskom članku
''Da li je Joe Taylor K1JT uništio radioamaterizam ?''

Temu sam otvorio sa sasvim drugom svrhom, što se vidi iz uvodnog posta.
Zato lijepo molim, nastavite ovdje.

Prije nego li komentiram članak imam pitanje (zapravo četiri pitanja):

1. Kakva je razlika između RTTY QSO-a FT8 QSO-a?
2. Kakva je razlika između PSK31 QSO-a FT8 QSO-a?
3. Kakva je razlika između CW QSO-a FT8 QSO-a?
4. Kakva je razlika između SSB QSO-a FT8 QSO-a?


73
Martin 9A2JK

[9A3IV]

Martine, Martine, kažeš da si radioamater i to puno godina i pitaš ovakve stvari. Ako ti nije jasno, nitko ti nemože odgovoriti

73 Damir

[9A3LI]

Martine, Martine, kažeš da si radioamater i to puno godina i pitaš ovakve stvari. Ako ti nije jasno, nitko ti nemože odgovoriti

Kakvo je ovo pitanje i kakav se odgovor očekuje na takvo pitanje?
I onda se čudimo da imamo dvije udruge za "komunikacije u kriznim situacijama"
a treća "HRS" sve tjera od sebe baš radi takvih "pitanja" poput tvojeg.
Zašto, čemu to ?
Ili je po drobroj staroj narodnoj navadi, tri Hrvata pet partija !!

[9A2JK]

Damire, očito nisi pratio od početka, pa dopusti da ti pojasnim.
Lijepo sam napisao: ''Prije nego li komentiram članak imam pitanje (zapravo četiri pitanja):''

Ako želiš, pročitaj članak, pa će ti biti jasno zašto sam postavio pitanja.
Kako možemo raspravljati o članku, a da ga ti nisi pročitao?
Da bi pak rasprava imala smisla, dobro bi bilo definirati pojmove, da ne bi ispalo da za
isti pojam ja mislim jedno, a ti drugo. Tada razgovor nema baš nikakvog smisla.
Valjda se tu slažemo?

Ako ti se pak ne da čitati članak, prepričano, u jednoj rečenici. Govorimo, da li je nova
vrsta emisije uništila radioamaterizam?

Da bi mogli odgovoriti na to pitanje, dobro bi bilo odgovoriti na pitanja (definirati pojmove)
kakva je razlika u QSO-u napravljenom drugom vrstom emisije, npr. razlika između
RTTY veze i CW veze i sl.

Damire, ako nisi radio FT8 QSO, onda napiši dvije rečenice, kakva je razlika raditi QSO SSB
od raditi QSO RTTY ili CW ?

73
Martin 9A2JK