Spektrum SPM7800 DX7S - Manual (Page 17)

17 SPEKTRUM DX7s • RADIO INSTRUCTION MANUAL
EN
FUNCTION LIST
Servo Setup
Servo Setup supports travel adjustment, Sub Trim, and servo
reversing. Servo Setup screens feature a servo monitor that
shows a visual reference for adjustments.
Travel adjust sets the overall travel or endpoints of the servo. You
can use Travel adjust to:
• prevent overthrowing a control surface or blocked movement
• increase or decrease overall control surface throw
• change flight performance of the model
Sub-Trim adjusts the center point for a servo’s travel
CAUTION: Use only small sub-trim values so a servo’s
maximum travel (in either direction) is NOT overdriven.
Servo Reversing is used to reverse the direction of a servo if
a control moves in the incorrect direction. When reversing the
Throttle channel, after pressing reverse, a screen will show
stating “Confirm Throttle Reverse. Are you sure? NO or YES” To
confirm, highlight YES and press the roller. A message appears,
reminding you to re-bind the system and set a new failsafe. If
you do not wish to reverse the throttle, highlight NO and press
the roller to prevent the throttle from reversing.
CAUTION: Always test the model after making adjustments
to make sure the model responds to controls as desired. Rebind
the transmitter to the model and set the failsafe after setting the
Servo Setup.
D/R & Exponential
Dual Rates and exponentials are available on the aileron, eleva-
tor and rudder channels. This adjusts control rates for servos.
Adjust the throws (Dual Rate) and center sensitivity (Expo) of the
control’s range independently. Designate a switch for moving
between control rates for a servo channel. Move the designated
switch to change the position (0 or 1) for Dual Rate and Expo
values.
CAUTION: Always test the model after making adjustments
to make sure the model responds to controls as desired.
Dual Rate affects the overall travel of a channel affecting control
response sensitivity equally throughout the range of that chan-
nel. Decreasing the dual rate decreases the maximum control
rate as well as overall sensitivity.
Exponential affects control response sensitivity around center but
has no affect on overall travel. Positive and negative exponential
values are available. We recommend a positive expo value as
it decreases control sensitivity around the center and does not
affect maximum travel. Negative exponential values increase
sensitivity around neutral and are seldom used.
Throttle Cut
The Throttle Cut function is for powering down an engine or mo-
tor using a designated switch. Throttle Cut has higher authority
than any other flight mode.
When the switch is activated, the throttle channel is driven to its
programmed value (normally off).
Test the Throttle Cut function by activating the programmed
switch. This effectively stops the engine or motor. Release the
throttle cut switch and normal throttle operation resumes. The
value of 0% is low throttle with mid trim. You may use negative
values.
Make sure the throttle goes to the desired position as shown in
the servo monitor on the left side of the screen. CAUTION: Always test the model after making adjustments
to make sure the model responds to controls as desired.