2019-06-06 14:15:12 -04:00
|
|
|
// Status=review
|
|
|
|
|
.Main Window:
|
|
|
|
|
- Select *FT4* on the *Mode* menu.
|
|
|
|
|
- Double-click on *Erase* to clear both text windows.
|
|
|
|
|
|
|
|
|
|
.Wide Graph Settings:
|
|
|
|
|
|
|
|
|
|
- *Bins/Pixel* = 7, *Start* = 100 Hz, *N Avg* = 1
|
|
|
|
|
- Adjust the width of the Wide Graph window so that the upper
|
|
|
|
|
frequency limit is approximately 4000 Hz.
|
|
|
|
|
|
|
|
|
|
.Open a Wave File:
|
|
|
|
|
|
|
|
|
|
- Select *File | Open* and navigate to
|
|
|
|
|
+...\save\samples\FT4\000000_000002.wav+. The waterfall and Band
|
|
|
|
|
Activity window should look something like the following screen shots.
|
2019-06-17 15:47:47 -04:00
|
|
|
This sample file was recorded during a practice contest test session, so
|
|
|
|
|
most of the decoded messages use the *RTTY Roundup* message formats.
|
2019-06-06 14:15:12 -04:00
|
|
|
|
|
|
|
|
[[X15]]
|
|
|
|
|
image::ft4_waterfall.png[align="left",alt="Wide Graph Decode FT4"]
|
|
|
|
|
|
|
|
|
|
image::ft4_decodes.png[align="left"]
|
|
|
|
|
|
|
|
|
|
- Click with the mouse anywhere on the waterfall display. The green Rx
|
|
|
|
|
frequency marker will jump to your selected frequency, and the Rx
|
|
|
|
|
frequency control on the main window will be updated accordingly.
|
|
|
|
|
|
|
|
|
|
- Do the same thing with the *Shift* key held down. Now the red Tx
|
|
|
|
|
frequency marker and its associated control on the main window will
|
|
|
|
|
follow your frequency selections.
|
|
|
|
|
|
|
|
|
|
- Do the same thing with the *Ctrl* key held down. Now the both colored
|
|
|
|
|
markers and both spinner controls will follow your selections.
|
|
|
|
|
|
|
|
|
|
- Now double-click on any of the the lines of decoded text in the Band
|
|
|
|
|
Activity window. Any line will show similar behavior, setting
|
|
|
|
|
Rx frequency to that of the selected message and leaving Tx frequency
|
|
|
|
|
unchanged. To change both Rx and Tx frequencies, hold *Ctrl* down
|
|
|
|
|
when double-clicking.
|
|
|
|
|
|
|
|
|
|
TIP: To avoid QRM from competing callers, it is frequently desirable
|
|
|
|
|
to answer a CQ on a different frequency from that of the CQing
|
|
|
|
|
station. The same is true when you tail-end another QSO. Choose a Tx
|
|
|
|
|
frequency that appears to be not in use. You might want to check the
|
|
|
|
|
box *Hold Tx Freq*.
|
|
|
|
|
|
|
|
|
|
TIP: Keyboard shortcuts *Shift+F11* and *Shift+F12* provide an easy
|
|
|
|
|
way to move your FT4 Tx frequency down or up in 90 Hz steps.
|
|
|
|
|
|
|
|
|
|
IMPORTANT: When finished with this Tutorial, don't forget to re-enter
|
|
|
|
|
your own callsign as *My Call* on the *Settings | General* tab.
|
