JT65-HF Setup and Operations GuideJT65-HF Version 1.0.7 ©2008...2010 J. C. Large – W6CQZJT65-HF is an adaptation of the JT65A protocol with an emphasi
Si570 USB Control. VERY experimental feature. See Appendix D – Si570 Control.
Colors. Optional, reasonably self-explanatory.
Diagnostics. Display various information about the inner working of JT65-HF and any (generally) non-critical issues. Please note the one check box a
Using JT65-HFBefore making your first attempt at a JT65a QSO please confirm you have completed the following checklist.Your call sign and grid have be
The proper sequence of a JT65 QSO (at least on HF).Assume I see VE3ODZ calling CQ and I engage in a QSO with him it would run something like the follo
JT65-HF, Main interface.It's difficult at best to contain everything needed to operate JT65-HF in one window of a size that is usable on most sys
Below the menu bar, starting on the left, you have the audio input controls/indicators. Notice in the example only one audio channel is active (the o
The spectrum display is divided into periods (1 minute segments) by the horizontal red lines. In the example you can see several JT65 signals over abo
Brightness and contrast allow you to tailor the display to your own eyes. In my own experience I have never used the non-default (center) positions f
The decoder output section.The lower left portion of the program is where decoded sequences display. In the display above you can see a number of rec
Warning!JT65 is equivalent to 100% key down carrier for the 47 second TX duration. You can easily overheat your final amplifier if it can not handle t
K = KVASD (Higher complexity error correction algorithm based on closed source KValgorithm).Exchange – The decoded text for the sequence.Color coding.
QSO Controls.TX Text (13 Characters) is an input box for simple text messages. This input box is editable and right clicking it will bring up a menu
Next you will see two rows of buttons labeled Call CQ, Answer Caller, Send RRR, Answer CQ, Send Report and Send 73. Working with these buttons you se
Lastly, TX will begin at the next valid even numbered minuteShould you wish to stop this you would click Halt TXJT65-HF, from its inception, has as it
Calling CQTo call CQ you would begin by clicking the “Call CQ” button. This would fill in the TX Generated box with CQ CALL GRID, for example, CQ W6C
RX DF enabled there is, at least, one case where it is exactly what you should not do. That case is when calling CQ.When calling CQ you have, hopeful
Everything ElseHaving covered everything on the right side of the main interface but the lower right portion you are left with;Single Decoder BWAFCNoi
shorthand response (remember, shorthand messages will not be decoded if multi is on)... or you just prefer to not be overloaded with many lines of dec
LoggingWhen you press the “Log QSO” button from the main window you will be presented with a window similar to the above. Depending upon when you cli
The Reverse Beacon (RB) NetworkSo what is a RB? The easiest way to explain this is to say what a 'Forward Beacon' or, more commonly labeled
Initial SetupUpon first launch of JT65-HF you will be presented with a window for configuration. While you will have many options available only a fe
PSK Reporter (PSKR)PSK Reporter is a system from Phil Gladstone – N1DQ that collects spots from a variety of sources/modes and provides a real time da
Appendix A – The JT65 ProtocolJT65 is a tightly structured protocol with a severely limited set of structured messages and a limited 'free text&a
Taken from the JT65 protocol definition is the following;“An amateur call sign consists of a one or two character prefix, at least one of which must b
bit grid space can take on the following values;An actual grid locator (like CM87), a signal report (like -11), a signal report with acknowledgment (l
situation, but, it is the JT65 protocol's limitation, not something that just a bit of clever programming can fix.A subtle and less often realize
in 'finding' the signal. The sync chain, or vector, is mathematically structured such that it stands out from other signals or random noise
false decodes are, generally, easily spotted as they don't look like anything you'd expect to see.Another source of invalid decodes is a bug
Appendix B – Sound Device DetailsJT65-HF does not require a 'high quality' sound device as is suggested for applications like SDR (Software
It is, to my knowledge, relatively uncommon to have too little input signal to the sound card, but, if you find you're having to turn the input
The image above is a portion of the main configuration screen and you can see that my sound card is exhibiting a sample rate error of 1.0006 for the i
Sound input/output is reasonably simple if you only have one sound device within your system. In the simplest case the default values of Microsoft So
Appendix C – CSV RX/TX LogFrom the main configuration screen you may enable a 'journal' of all decoded receptions and transmissions which wi
Appendix D – Si570 ControlComing soon. For now, if you do not know precisely what to do with Si570 control and why you are doing it simply stay away
Appendix E – JT65 and Time SyncThe most common user error leading to failure with communications using JT65 is that of having a local time value that
How JT65-HF Came to be.In the early Summer of 2007 I saw a [very] small article about using JT65 on the HF bands in QST magazine, probably the May or
WSJT data file kept changing. So began the quest to build my own program that would receive JT65a transmissions and submit reports to the RB Network
the default value if you use this feature.The next phase of Setup is Rig Control/PTT and is illustrated in the following graphic.Please note that you
alternate PTT method the only serial PTT method that works.Once you've entered a port value you may press the Test PTT button to perform an RX to
that your rig does not support PTT control.If you would like to test changing your rig's frequency you may enter a value in HERTZ and push the se
Heard List/PSKR/RB SetupThis configuration window is all optional configuration and information display.The heard list simply keeps track of all call
Macros. All optional, reasonably self-explanatory.
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