Spektrum SPM7800 DX7S - Manual (Page 4)

4 SPEKTRUM DX7s • RADIO INSTRUCTION MANUAL
EN
1. Install Main Receiver
Cover the main receiver in protective foam and attach the
receiver in your gas or glow aircraft using rubber bands or hook
and loop straps. In electric airplanes or helicopters, use double-
sided foam tape to attach the main receiver to the model.
2. Install Remote Receiver
Install the remote receiver in the model using double-sided tape.
Make sure the remote receiver antennas are more than 2 inches
from the main receiver antennas. Always install remote antennas
perpendicular to the main receiver’s antennas. Connect the main
and remote receivers using the included 6-inch remote receiver
lead.
3. Connect Servos to the Main Receiver
4. Install the Telemetry Module
Install the telemetry module in the aircraft using double-sided
tape. Connect the telemetry module to the receiver’s Data Port.
Receiver voltage and Flight Log data displays on your telemetry
screen. If you want an external voltage (main flight pack voltage)
to show on the telemetry screen, connect the voltage telemetry
sensor in the telemetry module. Connect voltage telemetry wires
to the input lead on the aircraft’s ESC using solder, with the
polarity red=positive and black=negative.
5. Charging Radio Batteries
First, connect the included power supply to the charging port on
the side of the transmitter and place the transmitter on a non-
flammable surface. Second, connect the AC adapter to a power
outlet using the appropriate outlet clip. Charge the included NiMH
battery for 10-12 hours.
CAUTION: Do not overcharge batteries. Charging times
greater than 12 hours may damage the battery and transmitter.
6. Bind the Receiver and Telemetry Module
A. Insert the bind plug in the receiver’s BIND/DATA port. In
systems using a separate battery pack and 3-wire switch,
insert the bind plug to the charge jack.
B. Power on the receiver. The LEDs on the receivers will flash.
C. Move transmitter sticks and switches to the desired failsafe
positions (low throttle and neutral control positions).
D. Push in the Trainer/Bind button on the transmitter while pow-
ering on the transmitter. Once the transmitter has entered
bind mode you can release the Bind button.
E. The LED on the receiver will show solid amber and the
system will connect after several seconds.
F. Remove the bind plug.
Typical Electric - Receiver uses the ESC for power.
Typical Glow/Gas - Uses receiver battery pack and 3-wire
switch.
7. Charge and Test Receiver Batteries
Loss of power to the receiver and servos is the leading cause of
failure. When using a receiver battery pack, make sure the pack
is properly charged and check the voltage under a 1A or 2A load.
Do not fly if the voltage is below 4.8V for a 4-cell pack while
loaded. If the voltage falls below the receiver’s operating thresh-
old (3.5 volts) at any time, an interruption in the link may occur.
8. Programming the Transmitter
Power on the transmitter, then power on the receiver. Make
sure the model responds to the transmitter controls as desired.
Use Servo Setup in the transmitter to reverse channels or adjust
travel as needed. Program other functions as needed to safely
control your model. Refer to additional sections of the manual for
more information about programming your transmitter.
9. Re-Bind the System
Once the transmitter is programmed for your model, re-bind the
system to set the failsafe position. If your model uses retracts,
re-bind the system with retracts in the down position. If the sig-
nal is lost, the throttle servo will go to the preset position chosen
during binding (normally low-throttle).
10. Range Check
A. With the system powered and the model restrained from
flyaway, stand 30 paces (approximately 90 feet/30 meters)
away from the model.
B. Face the model and hold the transmitter in your normal flying
position. Go to the transmitter’s Range Test screen and press
the Trainer button on the top of the transmitter. This causes
reduced power output from the transmitter.
C. Operate transmitter controls to make sure you have total
control of the model while holding down the trainer button.
D. If control issues exist, refer to the Troubleshooting Guide.
If you continue to experience control issues, contact the
appropriate Horizon Hobby Product Support office or go to
horizonhobby.com to find a local Spektrum distributor in your
country of service.
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