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Antenna Polarization
For optimum RF link performance it's important that the antennas be mounted in
an orientation that allows for the best possible signal reception when the aircraft
is in all possible attitudes and positions. This is known as antenna polarization.
The antennas should be oriented perpendicular to each other; typically vertical
and horizontal and at different angles (see Receiver Installation below). The
remote receiver antenna should be mounted in a position perpendicular at least 2
inches away from the main receiver's antenna using double-sided foam tape.
Using the AR7350/AR9350 Receiver With AS3X
By default, AS3X technology is turned off in AR7350/AR9350 receivers. Before
activating AS3X, you will need to properly install the receiver in the aircraft and
download the AS3X application to your mobile device.
Activating AS3X
1. Bind the transmitter and receiver.
2. Download the AS3X application from SpektrumRC.com or from your mobile
device (iOS or Android).
3. Power on the transmitter and receiver.
4. Open the AS3X application.
5. Connect the interface cable to the receiver and the device.
6. Use the application to program the receiver.
7. Press "Update" in the application to save the receiver programming.
Installing the Receiver
1. You can install the receiver under the canopy or in the bottom of the
fuselage. The servo pins must point toward the nose or tail of the fuselage.
2. Connect the servo and any desired telemetry sensors to the receiver.
3. Locate a flat spot inside the fuselage where you can install the receiver. The
location must be large enough to make contact with the entire base of the
receiver case. Add or remove material in the fuselage as necessary.
4. Apply high-quality, double-sided foam tape to the receiver case and press
the receiver case against the radio tray. The receiver must be mounted
securely to prevent it from moving in flight.
Important: Y-Harnesses and Servo Extensions
When using a Y-harness or servo extensions in your installation, it's important
to use standard non-amplified Y-harnesses and servo extensions as this can/
will cause the servos to operate erratically or not function at all. Amplified
Y-harnesses were developed several years ago to boost the signal for some older
PCM systems and should not be used with Spektrum equipment. Note that when
converting an existing model to Spektrum be certain that all amplfied Y-harnesses
and/or servo extensions are replaced with conventional non-amplified versions.
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