31
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Before Use
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Receiver's Antenna Installation
The R7108SB has two antennas. In order to maximize signal reception and promote safe modeling Futaba
has adopted a diversity antenna system. This allows the receiver to obtain RF signals on both antennas and
ly problem-free.
To obtain the best results of the diversity function,
please refer to the following instructions:
1. The two antennas must be kept as straight as
possible. Otherwise it will reduce the effective
range.
2. The two antennas should be placed at 90 degrees
to each other.
This is not a critical igure, but the most important
thing is to keep the antennas away from each
other as much as possible.
Larger models can have large metal objects
that can attenuate the RF signal. In this case
the antennas should be placed at both sides of
the model. Then the best RF signal condition is
obtained at any lying attitude.
3. The antennas must be kept away from conductive
materials, such as metal, carbon and fuel tank
by at least a half inch. The coaxial part of the
antennas does not need to follow these guidelines,
but do not bend it in a tight radius.
4. Keep the antennas away from the motor, ESC, and
other noise sources as much as possible.
*The two antennas should be placed at 90 degrees to each other.
*The Illustration demonstrates how the antenna should be placed.
*Receiver Vibration and Waterprooing: The receiver contains precision electronic parts. Be sure to avoid
vibration, shock, and temperature extremes. For protection, wrap the receiver in foam rubber or other
vibration-absorbing materials. It is also a good idea to waterproof the receiver by placing it in a plastic
bag and securing the open end of the bag with a rubber band before wrapping it with foam rubber. If you
accidentally get moisture or fuel inside the receiver, you may experience intermittent operation or a crash.
If in doubt, return the receiver to our service center for repair.
Antenna
Antenna
Antenna
*Must be kept as straight as possible.
Coaxial cable
R7108SB Receiver
Sleeve
Antenna
installation
90°
Do not bend the antenna part
Gently bend the coaxial
cable part.
Fix the sleeve to the model
Antenna part
Sleeve
Coaxial cable
If the frame is metal or carbon,
provide antenna-frame clearance.
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