Spektrum SPMMSJR9 - Manual (Page 21)

Spektrum Air Module 1
Preset fail-safe is ideal for sailplanes and is preferred by some modelers for their
glow- and gas-powered aircraft.
Receiver Power Only
When the receiver only is turned on (no transmitter signal is present) all servos
except for the throttle are driven to their preset fail-safe positions, normally control
surfaces at neutral and the landing gear down. These fail-safe positions are stored
in the receiver during binding. At this time the throttle channel has no output, to
avoid operating or arming the electronic speed control. In glow-powered models,
the throttle servo has no input so it remains in its current position.
After Connection
When the transmitter is turned on and after the receiver connects to the transmitter,
normal control of all channels occurs. After the system makes a connection, if
loss of signal occurs preset fail-safe drives all servos to their preset fail-safe
positions. For sailplanes it’s recommended that the spoilers/ flaps deploy to
de-thermalize the aircraft, preventing a flyaway. Some powered modelers prefer to
use this fail-safe system to program a slight turn and low throttle to prevent their
aircraft from flying away. When the signal is regained, the system immediately (less
than 4 ms) regains control.
Programming SmartSafe
(All Spektrum Aircraft Receivers)
During the binding process (see page 17), the bind plug is left in throughout the
process and is removed only after the receiver connects to the transmitter. After
the connection is made, confirmed by operating the servos, the bind plug can be
removed. The receiver is now programmed for SmartSafe.
Programming Preset Fail-safe
(AR 9000 SPM Receivers Only)
During the binding process the bind plug is inserted in the bind port or in the
charge jack (as shown on page 17), then the receiver is powered up. The LED’s
in each receiver should blink, indicating that the receiver is in bind mode. Now
before binding the receiver to the transmitter and with the receiver in
bind mode, remove the bind plug. The LED’s will still be blinking. With the
control sticks and switches in the desired fail-safe positions, bind the transmitter
to the receiver by pressing and holding the bind buttons on the back of the
transmitter/module and turning on the transmitter. The system should connect in
less than 15 seconds. The receiver is now programmed for preset fail-safe.
Note: Fail-safe positions are stored via the stick and switch positions on
the transmitter during binding.
Preset Fail-Safe