FST4W is used in the same way as WSPR, but FST4W has significant
advantages for use on the 2200 and 630 m bands.  By default the
central *Rx Freq* is 1500 Hz and *F Tol* is 100 Hz, so the active
decoding range is 1400 to 1600 Hz.  However, for added flexibility you
can select different center frequencies and *F Tol* values.  We expect
that usage conventions will soon be established for FST4W activity on
2200 and 630 m.

A new drop-down control below *F Tol* offers a round-robin mode for
scheduling FST4W transmissions:

image::FST4W_RoundRobin.png[align="center"]

If three operators agree in advance to select the options *1/3*,
*2/3*, and *3/3*, for example, their FST4W transmissions will occur in
a fixed sequence with no two stations transmitting simultaneously.
Sequence 1 is the first sequence after 00:00 UTC.  For WSPR-like
scheduling behavior, you should select *Random* with this control.