MotionRC Detrum RXC8 User manual

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Motion RC User Guide for the
Detrum RXC8 Receiver
Version 1.0

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Motion RC User Guide for the Detrum RXC8 Receiver
Contents
Review the Receiver’s Features ....................................................................................... 1!
Review the Receiver’s Ports, Controls, and Connection Orientation ............................... 2!
Bind the Receiver to a Transmitter and Model ................................................................. 3!
Change the Receiver’s Mode ........................................................................................... 6!
Mount the Receiver in a Model and Secure its Antennas ................................................ 6!
Appendix A RXC8 Specifications ..................................................................................... 7!

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Motion RC User Guide for the Detrum RXC8 Receiver Page 1
This guide provides you with information about the Detrum RXC8 receiver. This information
includes an overview of the receiver along with step-by-step instructions for binding and
installing it.
Review the Receiver’s Features
• Diversity antennas for stronger signal reception
• 2.4 GHz Direct Sequence Spread Spectrum (DSSS) and Frequency-Hopping Spread
Spectrum (FHSS) technology to maximize performance and minimize interference
• 8 input ports so you can control up to 8 channels
• BIND/Mode button enables you to bind the receiver to a transmitter for a specific model
and change the operating mode of the receiver
• Fail-safe places all controls in their fail-safe positions if the receiver loses signal

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Motion RC User Guide for the Detrum RXC8 Receiver Page 2
Review the Receiver’s Ports, Controls, and Connection
Orientation
The RXC8 has the following ports:
• PPM/AILE—Pulse Position Modulation (used to connect to a PPM flight controller) or
ailerons (this manual covers only using this port to connect to servos)
• ELEV—elevator
• THRO—throttle/ESC
• RUDD—rudder (and steering in many models)
• GEAR—retracts
• AUX1—auxiliary, such as for flaps
• AUX2—auxiliary, for example, an independent steering servo or brakes
• AUX3—auxiliary, for example, to control a gyro
You can program some of these ports, such as the AUX ports, to be controlled by specific
switches on the transmitter. For example, you might want to use the AUX1 port for flaps and
program a three-position switch on the transmitter (for example, the FMOD switch on the
GAVIN-6C transmitter) to control this port.
You use the Bind/Mode button to bind the receiver and change its mode.

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When connecting servos to the receiver, ensure the control wire (white or orange) is toward the
top of the receiver. Make sure the servo connectors are firmly installed in the receiver to ensure
they don’t come loose during flight.
Bind the Receiver to a Transmitter and Model
To use the receiver, you must bind it to a transmitter. During this process, the transmitter and
receiver establish a unique code so that the transmitter recognizes the receiver as being used for a
specific model. This connection also prevents interference from other transmitters.
You only need to bind the receiver once for each model with which you use it. If you move the
receiver to a new model, you must bind it to that model (it won’t be bound to the previous model
any more).
It’s easier to bind the receiver to a model before installing it, but the same process works whether
the receiver is installed or not. Use the following steps to bind the RXC8 to a Detrum transmitter,
such as the GAVIN-8C (these steps may be different with other types of Detrum transmitters;
refer to the Motion RC Supplemental Guide for your transmitter for the specific steps for your
transmitter):
1. Turn the transmitter on.
2. When the home screen is displayed, press ENT.

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3. Select Model Set and press ENT.
4. Select Model and press ENT.
5. Highlight the model you want to bind to the RXC8 and press ENT. The model you
selected becomes active.
6. Press EXT twice to move back to the home screen.
7. Turn the transmitter off.
8. Use the Motion RC Supplemental Guide for your transmitter to determine which switch is
used to bind the transmitter to a receiver. For example, the GAVIN-8C uses the SC
switch while the GAVIN-6C uses the TRAINER switch. Some transmitters, such as the
GAVIN-6A, don’t have a specific switch for binding; instead you just turn on the
transmitter.
9. Connect the RXC8 receiver to at least one servo and to the ESC; if the receiver is already
installed in a model, skip this step.
10. Power the receiver by connecting a battery to the ESC. The Bind light on the receiver
flashes red quickly indicating that it isn’t bound to anything. The PWM (Pulse Width
Modulation)/PPM (Pulse Position Modulation) Mode light illuminates green for 2

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seconds indicating the receiver is in PWM mode (which is correct when using the
receiver to control standard servos). (If this light is red instead, the receiver is in PPM
mode instead. If you are using the receiver in a model that doesn’t have a flight
controller, you need to switch the receiver to the PWM Mode as described in “Change the
Receiver’s Mode.”)
11. Use a pen or other pointed object to press and hold the Bind/Mode button the receiver
until the Bind light flashes red slowly indicating it is in Bind mode. (When you first press
the Bind/Mode button, the PWM/PPM Mode light also illuminates for 2 seconds.)
12. Hold the bind switch (if your transmitter uses one) you identified in step 8 in the forward
position (toward the front of the transmitter) and turn the transmitter on. You hear the
bind tone on the transmitter and the Bind light on the receiver becomes solid green,
indicating the bind process is complete.
13. Move the control associated with the servo you connected to ensure it moves. If so, the
model is bound. If not, repeat this process until it is successful.
14. Power off the receiver.
15. Power off the transmitter. You are ready to program and install the receiver.

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Change the Receiver’s Mode
If the PWM/PPM Mode light is red instead of green, change the receiver’s mode to PWM by
performing the following steps:
1. Disconnect the receiver from power.
2. Use a pen or other pointed object to press and hold the Bind/Mode button down.
3. Power the receiver by connecting the ESC to a battery. The Bind light illuminates (green
if bound, flashing red if not) and the PWM/PPM Mode light illuminates in red.
4. Hold the Bind/Mode button down until the PWM/PPM Mode light is green.
Mount the Receiver in a Model and Secure its Antennas
1. Connect the servo and ESC leads to the corresponding ports on the receiver.
2. Position the receiver in the model trying to avoid the antennas being blocked by the
battery, ESC, or other components. As you decide where to place the receiver in the
model, you should also consider antenna positioning as described in step 4.
3. Use double-sided tape or hot glue to mount the receiver in the model.
4. Use tape to position and secure the antennas so they are 90 degrees from each other. For
example, position one of the antennas so it is parallel to the model’s centerline axis and
the other so it points up, down, left, or right. Placing the antennas at 90 degrees to each
other maximizes signal strength and minimizes the chances of interference.

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Motion RC User Guide for the Detrum RXC8 Receiver Page 7
Appendix A RXC8 Specifications
Parameters
Detrum RXC8 Specifications
Type
2.4 GHz 8-channel
Sensitivity
-97 dBm
Frequency interval
Greater than or equal to 4 MHz
Power supply
3.6~6V
Weight
12 g
Size
39 mm x 28.5 mm x 14.5 mm