mirror of
https://github.com/saitohirga/WSJT-X.git
synced 2024-11-05 17:01:17 -05:00
85 lines
3.7 KiB
Plaintext
85 lines
3.7 KiB
Plaintext
FT4 is designed for contesting, particularly on the HF bands and 6
|
||
meters. Compared with FT8 it is 3.5 dB less sensitive and requires
|
||
1.6 times the bandwidth, but it offers the potential for twice the QSO
|
||
rate.
|
||
|
||
.Main Window:
|
||
- Select *FT4* on the *Mode* menu.
|
||
- Double-click on *Erase* to clear both text windows.
|
||
|
||
.Wide Graph Settings:
|
||
|
||
- *Bins/Pixel* = 5, *Start* = 100 Hz, *N Avg* = 1
|
||
- Adjust the width of the Wide Graph window so that the upper
|
||
frequency limit is approximately 3300 Hz.
|
||
|
||
.Open a Wave File:
|
||
|
||
- Select *File | Open* and navigate to
|
||
+...\save\samples\FT4\200514_182053.wav+. The waterfall and Band
|
||
Activity window should look something like the following screen shots.
|
||
This sample file was recorded during a practice contest test session, so
|
||
most of the decoded messages use the *RTTY Roundup* message formats.
|
||
|
||
[[X16]]
|
||
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 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.
|
||
|
||
.Best S+P Button
|
||
|
||
The FT4 user interface includes a button labeled *Best S+P*.
|
||
|
||
image::Best_S+P.png[align="center"]
|
||
|
||
Clicking *Best S+P* during an Rx cycle arms the program to examine all
|
||
CQ messages decoded at the end of the Rx sequence. The program will
|
||
select the best potential QSO partner (from a contesting perspective),
|
||
and treat it as if you had double-clicked on that line of decoded
|
||
text. Here "best potential QSO partner" means "New Multiplier" (1st
|
||
priority) or "New Call on Band" (2nd priority). "New Multiplier" is
|
||
currently interpreted to mean "New DXCC"; a more broadly defined
|
||
multiplier category (for the ARRL RTTY Roundup rules) will be
|
||
implemented in due course. We may provide additional priority
|
||
rankings, for example “New Grid on Band” (useful for North American
|
||
VHF contests), sorting by signal strength, etc.
|
||
|
||
*Best S+P* is a useful feature only if you have defined what "best" is
|
||
supposed to mean. This is done by configuring suitable options on the
|
||
*Settings | Colors* tab. Selection and ordering of color-highlighting
|
||
options determines what potential QSO partners will be chosen by the
|
||
"Best S+P" feature. Optimum choices will be different for different
|
||
contests. In a contest using RTTY Roundup rules we recommend
|
||
activating *My Call in message*, *New DXCC*, *New Call on Band*, *CQ
|
||
in message* and *Transmitted message*, reading from top to bottom.
|
||
|
||
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.
|
||
|
||
TIP: For easy keyboard control of transmitted messages, check
|
||
*Alternate F1–F6 bindings* on the Settings | General tab. In
|
||
contest-style operation you can then hit *F1* to solicit a QSO by
|
||
sending CQ. Similarly, keys *F2* to *F5* will send the messages in
|
||
entry fields *Tx2* to *Tx5*. More details on contest-style operation
|
||
can be found in {ft4_protocol}.
|
||
|
||
IMPORTANT: When finished with this Tutorial, don't forget to re-enter
|
||
your own callsign as *My Call* on the *Settings | General* tab.
|