The CF Step function sets the step size of the
center frequency when using the arrow keys or
scroll wheel.
When the scroll wheel or arrow keys or are
used to alter the center frequency, each
turn/press will move the center frequency by
the step size specified by the CF Step function.
In auto mode, the center frequency step size is
equal to 10% (1 division) of the span.
> CF Step[F4] and set the CF Step to
Auto or Man.
2. If Man was selected, set the frequency and unit
of the center frequency step size.