RadioLink AT9S PRO Manual page 26

Adjustability:
• Range: 0 - 140% (0 setting would deactivate the control completely.) Initial value=100%
• Adjustable for each direction (ACRO/ GLID)
(i.e. Up/down, left/right) (Ex: Most models fly upright without any elevator trim, but require some down
elevator when inverted just to maintain level flight. By increasing the down travel by the amount required to
hold the model inverted, the model now has equal travel available from level upright or level inverted.
Only if any stick is chosen by the item of "SW1", a switch can also be chosen by the item of "SW2." When
operated simultaneously, the switch operation has priority over the stick operation. (ACRO)
Exponential:
Change the response curve of the servos relative to the stick position to make fly more pleasant. You can
make the servo movement less or more sensitive around neutral for rudder, aileron, elevator, and throttle
(except HELI type use THROTTLE CURVE instead). (ACRO type throttle EXP and THROTTLE CURVE can
not be activated simultaneously). Many models require a large amount of travel to perform their best tricks.
However, without exponential, they are touchy around neutral, making them unpleasant to fly and making
small corrections very difficult. Additionally, by setting different exponentials for each rate, you can make the
effectiveness of small corrections similar in each rate, as in our example below:
The best way to understand exponential is to try it:
• Having made no changes yet in the D/R, EXP screen, move SWITCH D to DOWN (toward the AILERON
STICK).
• Move SWITCH D up. Hold the AILERON STICK at 1/4 sticks and moves SWITCH D down.
• Notice how much less travel there is.
• Go to 3/4 stick and repeat. Notice how the travel is much closer, if not identical.
Adjustability:
• More sensitive around neutral. (Positive exponential)
• Less sensitive around neutral. (Negative exponential)
• Adjustable for each direction. (ACRO/GLID)
For throttle, exponential is applied at the low end to help nitro and gasoline engines have a linear throttle
response, so that each 1/4 stick increases engine RPM 25% of the available range. (In most engines this
ranges from 5-60%)
Special note for helicopters: Helicopter model types have just a single rate for each switch position rather
than a rate for each side of the servo's travel per switch position. Additionally, setting the D/R, EXP for each
switch position requires cursor back to the No. setting and changing the switch position here. Just flipping the
switch does not affect the screen setting, allowing dual rates to be assigned with idle-up and other features on
certain switches, and does not require putting the model in that condition to make modifications.
Special note for conditions: The helicopter and glider programming offers you the choice of COND. This
option allows you to have a separate rate for each of the 3 controls automatically selected when changing
conditions, for a total of FIVE rates available. Simply change the switch choice to COND. and then:
(HELI) press the CURSOR LEVER to toggle through the 5 conditions while setting the rates.
(GLID) activate the corresponding condition to edit the rates.
Goals
Open D/R,EXP
Set up dual rates
and exponential
Choose channel
in HELI model.
Choose first channel position
Steps Inputs
for 1s.(If ADVANCE
to D/R EXP,PUSH.
to CH, Push. to desired channel. PUSH
to NO,PUSH. to UP,PUSH.
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