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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8141 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
95 lines
3.6 KiB
Plaintext
95 lines
3.6 KiB
Plaintext
For this step and the next, you may want to pretend you are K1JT
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by entering that callsign temporarily as *My Call* on the
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*Settings | General* tab. Your results should then be identical to
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those shown in the screen shot below.
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.Open a Wave File:
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- Select *File | Open* and select the file
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+...\save\samples\JT9\130418_1742.wav+. When the file opens you should
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see something similar to the following screen shot:
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[[X12]]
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image::main-ui.png[align="center",alt="Main UI and Wide Graph"]
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.Decoding Overview
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Decoding takes place at the end of a receive sequence and proceeds in
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two steps. The first decode is done at the selected Rx frequency,
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indicated by the U-shaped green marker on the waterfall frequency
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scale. Results appear in both the left (*Band Activity*) and right
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(*Rx Frequency*) text windows on the main screen. The program then
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finds and decodes all signals in the selected mode over the displayed
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frequency range. The red marker on the waterfall scale indicates your
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Tx frequency.
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Seven JT9 signals are present in the example file, all decodable.
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When this file was recorded KF4RWA was finishing a QSO with K1JT.
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Since the green marker was placed at his audio frequency, 1224 Hz, his
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message `K1JT KF4RWA 73` is decoded first and appears in the *Rx
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Frequency* window. The *Band Activity* window shows this message plus
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all decodes at other frequencies. By default lines containing `CQ`
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are highlighted in green, and lines with *My Call* (in this case K1JT)
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in red.
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[[X13]]
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.Decoding Controls
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To gain some feeling for controls frequently used when making QSOs,
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try clicking with the mouse on the decoded text lines and on the
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waterfall spectral display. You should be able to confirm the
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following behavior:
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- Double-click on either of the decoded lines highlighted in
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green. This action produces the following results:
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** Callsign and locator of a station calling CQ are copied to the *DX
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Call* and *DX Grid* entry fields.
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** Messages are generated for a standard minimal QSO.
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** The *Tx even* box is checked or cleared appropriately, so that you
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will transmit in the proper (odd or even) minutes.
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** The Rx frequency marker is moved to the frequency of the CQing
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station.
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** The *Gen Msg* ("`generated message`") radio button at bottom right
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of the main window is selected.
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** If you had checked *Double-click on call sets Tx Enable* on the
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*Setup* menu, *Enable Tx* would be activated and a transmission would
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start automatically at the proper time.
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** You can modify the double-click behavior by holding down the
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*Shift* key to move only the Tx frequency or the *Ctrl* key to move
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both Rx and Tx frequencies.
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- Double-click on the decoded message `K1JT N5KDV EM41`, highlighted
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in red. Results will be similar to those in the previous step. The Tx
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frequency (red marker) is not moved unless *Shift* or *Ctrl* is held
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down. Messages highlighted in red are usually in response to your own
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CQ or from a tail-ender, and you probably want your Tx frequency to
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stay where it was.
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- You can prevent your Tx frequency from being changed by checking the
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box *Lock Tx Freq*.
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- Click somewhere on the waterfall to set Rx frequency (green marker
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on waterfall scale).
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- Shift-click on the waterfall to set Tx frequency (red marker).
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- Ctrl-click on the waterfall to set both Rx and Tx frequencies.
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- Double-click on a signal in the waterfall to set Rx frequency and
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start a narrow-band decode there. Decoded text will appear in the
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right window only.
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- Ctrl-double-click on a signal to set both Rx and Tx frequencies and
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decode at the new frequency.
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- Click *Erase* to clear the right window.
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- Double-click *Erase* to clear both text windows.
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