mirror of
https://github.com/saitohirga/WSJT-X.git
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97 lines
3.8 KiB
Plaintext
97 lines
3.8 KiB
Plaintext
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// Status=review
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.Wide Graph Settings:
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- Bins/Pixel = 7
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- Zero = -3
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- If necessary, adjust the width of the Wide Graph Window so that its upper
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frequency limit is 4000 Hz.
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.Main Window:
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- Select JT9+JT65 on the Mode menu
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- Toggle the Tx mode button to read Tx JT65, and set the Tx and Rx
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frequencies to 1718 Hz.
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- Double-click on Erase to clear both text windows
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.Open a Wave File:
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- Select File | Open and navigate to ...\save\samples\130610_2343.wav.
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The waterfall should look like the figure below.
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//.130610_2343.wav Decode
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[[X14]]
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image::images/130610_2343-wav-80.png[align="left",alt="Wide Graph Decode 130610_2343"]
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This sample file contains 17 decodable signals — nine in JT65 mode
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(flagged with the character # in the decoded text windows), and eight
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in JT9 mode (flagged with @). Since the Tx mode was set to Tx JT65,
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signals in that mode were decoded first. If you had selected Tx JT9,
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JT9 signals would have been decoded first.
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TIP: Notice the [blue]*BLUE* marker on the waterfall scale, by
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default set at 2500 Hz. Its position is set by the spinner control
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JT65 nnnn JT9, where nnnn is a frequency in Hz. In JT9+JT65 mode the
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program will decode JT65 signals below this frequency and JT9 signals
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above it.
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- Confirm that mouse-click behavior is similar to that described
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<<X13,earlier>>. The program automatically determines the mode of each
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JT9 or JT65 signal.
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- Double-click on the waterfall near 815 Hz: a JT65 message
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originating from W7VP will be decoded and appear in the Rx Frequency
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Box:
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[width="70%",cols="3,^3,^3,^4,^4,30",options="header"]
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|=================================
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|UTC|db|dt|Freq|Mode|Message
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|2343|-7|0.3|815|#|KK4DSD W7VP -16
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|=================================
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- Double-click on the waterfall at 3196 Hz and the program will decode a JT9
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message from IZ0MIT:
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[width="70%",cols="3,^3,^3,^4,^4,30",options="header"]
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|=====================================
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|UTC|db|dt|Freq|Mode|Message
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|2343|-7|0.3|3196|@|WB8QPG IZ0MIT -11
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|=====================================
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TIP: Notice that when a signal is decoded in this way, the Tx mode
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automatically switches to that of the decoded signal and the Rx and Tx
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frequency markers on the waterfall scale resize themselves
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accordingly.
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- Scroll back in the Band Activity window and double-click on the
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message CQ DL7ACA JO40. The program will set Tx mode to JT65 and Tx
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and Rx frequencies to that of DL7ACA, 975 Hz. If you had checked
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*Double-click on call sets Tx Enable* on the Setup menu, the program
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would configure itself to start a QSO with DL7ACA.
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- Double-click on the decoded JT65 message CQ TA4A KM37. The program
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will set Tx mode to JT9 and the Rx and Tx frequencies to 3567 Hz. The
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program is now configured properly for a JT9 QSO with TA4A.
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IMPORTANT: Don’t forget to re-enter your own call-sign as “My Call”.
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.Reopen the First Sample File:
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- Select File | Open and navigate to ...\save\samples\130418_1742.wav.
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These data were recorded with a much narrower Rx bandwidth, roughly
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200 to 2600 Hz. If you have no Rx filter wider than about 2.7 kHz, you
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will be using data like this. For best viewing of such data adjust
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Bins/Pixel and the width of the Wide Graph so that only the active
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part of the spectrum shows, say 0 to 2600 Hz. Re-open the example
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file after any change of Bins/Pixel or Wide Graph width, to refresh
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the waterfall.
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The signals in this file are all JT9 signals. To decode them in
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JT9+JT65 mode you’ll need to move the JT65 nnnn JT9 delimiter down to
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1000 Hz or less.
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.Start, Zero, and Gain
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Now is a good time to experiment with the *Start*, *Zero*, and
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*Gain* parameters. *Start* sets the starting frequency at the left
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side of the waterfall scale. *Zero* sets the baseline level for
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colors, and *Gain* sets the sensitivity for color changes. For the
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receiver setup of this file good values are *Zero*=0, *Gain*=0.
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Re-open the wave file after each change, to see the new results.
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