FUTABA 16SZ Instruction Manual page 177

Hysteresis-type and box-type can be selected in a hardware select screen.
When a stick, trim lever, or VR is used as a switch, the following 4 modes can be selected.
◆ Linear・Hysteresis mode
This setting method selects function ON/OFF based
on the set point. Hysteresis (dead band) can be set
to ON and OFF. The ON and OFF positions can be
reversed with the Reverse button.
◆ Linear・Box mode
This mode turns on the switch within a range of 2 points.
Each point can be set. The ON and OFF positions can be
reversed with the Reverse switch.
＜ Data ＞
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◆ Symmetry・Hysteresis mode
The operation is the same as the linear hysteresis
mode, but left and right (up and down) operations are
symmetrical about the neutral position. For example,
when you want to switch DR1 with the aileron stick,
when the stick is moved to the left or right, DR1 can
be turned ON at the same left and right position.
◆ Symmetry・Box mode
The operation is the same as the linear box mode,
but left and right (up and down) operation is
symmetrical about the neutral position.