Quick Start Guide. Spektrum SPM7800C, DX7s 7-Ch, DX7s 7-Ch DSMX Radio System, SPM55101, DX7s Transmitter Only MD2, SPMR7800

EN

QUICK START GUIDE

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 doublesided 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 nonflammable 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 powering 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 threshold (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 signal 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.

4 SPEKTRUM DX7s • RADIO INSTRUCTION MANUAL