Spektrum Receiver AR637T DSM2/DSMX 6CH AS3X w/ Telemetry User guide

Spektrum AR637T AS3X and SAFE
6 CH Receiver

Spektrum AR637T AS3X und SAFE Empfänger
mit 6 Kanälen

Récepteur 6canaux SAFE et Spektrum AR637T
AS3X

Ricevitore Spektrum AR637T AS3X e SAFE 6 CH

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NOTICE

All instructions, warranties and other collateral documents are subject to
change at the sole discretion of Horizon Hobby, LLC. For up-to-date product
literature, visit horizonhobby.com or towerhobbies.com and click on the support
or resources tab for this product.

Meaning of Special Language

The following terms are used throughout the product literature to indicate
various levels of potential harm when operating this product:

WARNING: Procedures, which if not properly followed, create the probability
of property damage, collateral damage, and serious injury OR create a high
probability of superfi cial injury.

CAUTION: Procedures, which if not properly followed, create the probability
of physical property damage AND a possibility of serious injury.

NOTICE: Procedures, which if not properly followed, create a possibility of
physical property damage AND a little or no possibility of injury.

WARNING: Read the ENTIRE instruction manual to become familiar
with the features of the product before operating. Failure to operate
the product correctly can result in damage to the product, personal
property and cause serious injury.

This is a sophisticated hobby product. It must be operated with caution
and common sense and requires some basic mechanical ability. Failure to
operate this Product in a safe and responsible manner could result in injury
or damage to the product or other property. This product is not intended for
use by children without direct adult supervision. Do not attempt disassembly,
use with incompatible components or alter product in any way without the
approval of Horizon Hobby, LLC. This manual contains instructions for safety,
operation and maintenance. It is essential to read and follow all the instruc­tions and warnings in the manual, prior to assembly, setup or use, in order to
operate correctly and avoid damage or serious injury.

Age Recommendation: Not for children under 14 years. This is not a toy.
WARNING AGAINST COUNTERFEIT PRODUCTS

Always purchase from a Horizon Hobby, LLC authorized dealer to ensure
authentic high-quality Spektrum product. Horizon Hobby, LLC disclaims
all support and warranty with regards, but not limited to, compatibility and
performance of counterfeit products or products claiming compatibility with
DSM or Spektrum technology.

NOTICE: This product is only intended for use with unmanned, hobby-grade,
remote-controlled vehicles and aircraft. Horizon Hobby disclaims all liability outside
of the intended purpose and will not provide warranty service related thereto.

WARRANTY REGISTRATION

Visit www.spektrumrc.com/registration today to register your product.

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AR637T AS3X and SAFE Telemetry Receiver

The Spektrum™ AR637T Receiver
is full range with telemetry, and is
compatible with all Spektrum™
DSM2® and DSMX® technology
transmitters.
Perform the setup for the AR637T
receiver through a compatible
Spektrum Transmitter with Forward
Programming. The Spektrum PC Programmer can be used for fi rmware updates.

Table of Contents

Smart Throttle ..............................................................................................4

Specifi cations ..............................................................................................4

Telemetry ....................................................................................................5

Installing the AR637T Receiver .....................................................................5

Transmitter and Receiver Binding ..................................................................6

Failsafe ......................................................................................................7

Initial Setup .................................................................................................7

AR637T Receiver- Basic AS3X Setup ............................................................8

AS3X Reaction Test ......................................................................................9

AR637T Receiver- SAFE Setup....................................................................10

Advanced Tuning ........................................................................................11

SAFE (Self Leveling) Flying Tips ...................................................................14

Other Settings (Forward Programming) ........................................................14

Channel Limitations ....................................................................................15

Flight Log ..................................................................................................16

Range Testing ............................................................................................17

Receiver Power System Requirements .........................................................18

Glossary ....................................................................................................18

Optional Accessories ..................................................................................19

Troubleshooting Guide AS3X .......................................................................20

Troubleshooting Guide ................................................................................21

1-YEAR LIMITED WARRANTY ......................................................................23

Warranty and Service Contact Information ...................................................25

FCC Information .........................................................................................25

IC Information ............................................................................................27

Compliance Information for the European Union ...........................................27

IMPORTANT: The AR637T receiver only uses forward programming for the

confi guration, do not use the AS3X menu in the main transmitter menu.

WARNING: If equipped, the propeller should not be installed on the

motor during the setup procedure. Only install the propeller once the
throttle has been confi rmed to operate correctly and the failsafe has been set.
As an additional safety feature, we recommend the throttle cut is enabled.
Throttle cut should be engaged any time the aircraft is powered on and not
in operation. The motor will not rotate when throttle cut is in the ON position.

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Specifi cations

Type DSM2/DSMX 6 CH AS3X Telemetry Receiver
Application Air
Channels 6
Receivers 1
Remote Receiver

(not included)
Modulation DSM2/DSMX
Telemetry Integrated
Bind Method Bind Button, Bind Plug
Failsafe Yes
Band 2.4GHz
Dimensions (LxWxH) 49.80 x 23.34 x 15.02mm
Weight 12g
Input Voltage 3.5–9V
Resolution 2048
Antenna Length 155mm and 186mm

SRXL2

AR637T

™

Remote Receiver Optional

[SPM9747, SPM4651T]

Bind Button
SRXL2 Port
XBUS Port
Voltage Sensor Port
Smart Port

Smart Throttle

With Smart Technology the normal servo connector delivers the throttle signal
to the ESC, plus the ESC can send telemetry data like voltage and current
back to the receiver. The AR637T receiver throttle port (Channel 1 port only)
will automatically detect when a Smart compatible ESC is connected. ESCs
with Smart and IC series connectors can also pass along battery data from
compatible Spektrum Smart batteries. Spektrum Avian™ ESCs are compatible
with the AR637T receiver for Smart Technology features.

For Smart to function you must have a Smart ESC paired with a Smart
telemetry receiver, and a Spektrum DSMX transmitter with telemetry. An update
for your transmitter may be required for Smart features. See www.spektrumrc.
com to register and update your transmitter.

If a standard ESC or servo is plugged into the throttle port on the AR637T
receiver, the throttle port will operate normally (PWM signal) like any
conventional RC system.

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Telemetry

The AR637T features full range telemetry and will provide receiver battery
voltage, fl ight log data, and variometer* and altitude* data without any
additional sensors. Additional telemetry devices such as voltage sensors can
be connected to the volt port, and XBus telemetry sensors can be connected
through the XBus connector. Every XBus telemetry device has two XBus ports,
and XBus telemetry sensors can be connected in a daisy chain in any order.

*TIP: AR637TA receivers included with BNF models do not have a
built-in pressure sensor for altitude and vertical speed data (variometer)
measurements. If you want to add altitude and variometer to an AR637TA, an
external sensor (SPMA9589) can be connected to the XBus system.

The AR637T is not compatible with the Spektrum Temperature Sensor (SPMA9571)

See www.spektrumrc.com for more information about telemetry accesories

Installing the AR637T Receiver

1. Mount the receiver using double-sided servo tape. The receiver may be

mounted upright, upside down or on its side, but it should be square with
the fuselage in its mounting position. The receiver cannot be mounted at
an odd angle.

TIP: For SAFE setups, install the receiver as close to the center of gravity of
the aircraft as practical.

2. Connect the servos to their respective ports on the receiver using the chart

below.

CAUTION: Incorrect installation of the receiver could cause a

crash. Always perform a control surface check and AS3X control

surface response test before fl ying a new setup, or after any setup changes.

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DEFAULT CHANNEL ASSIGNMENTS

AR637T Port Assignments

Bind/Prog/SRXL2= Bind, Aux Device Support, Program
1 Throttle (Smart Throttle)
2 Aileron
3 Elevator
4 Rudder
5 Gear
6 Aux 1

IMPORTANT:

equipment, do not use reversing harnesses. Using reversing Y-harnesses or
servo extensions may cause servos to operate erratically or not function at all.

When using Y-harness or servo extensions with Spektrum

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ANTENNA INSTALLATION

The AR637T receiver has coaxial style antennas.
We recommend installing the antennas oriented
90º from each other and as far as possible from
metal, batteries, carbon fi ber or fuel tanks to
maximize signal reception performance.

NOTICE: Do not cut, kink, or modify the antennas. Damage to the coaxial
portion of an antenna will reduce the performance of the antenna.
Shortening or cutting off the 31mm tip will reduce the range.

Active portion
of antenna

Transmitter and Receiver Binding

Programming the AR637T receiver requires a Spektrum™ DSM2®/DSMX®
compatible transmitter with Forward Programming.

Binding

The AR637T receiver must be bound to your transmitter before it will operate.
Binding is the process of teaching the receiver the specifi c code of the transmitter
so it will only connect to that specifi c transmitter.

1. Connect the optional SRXL2 remote receiver (SPM9747) if desired and any

telemetry sensors to the main receiver.

2. Push and hold the bind button on the receiver while turning the receiver on.

Release the bind button once the orange LED starts to fl ash continuously,
indicating the receiver is in bind mode.

TIP: It is still possible to use a
bind plug in the bind port if
desired. This can come
in handy if the receiver
needs to be mounted in
a location that is diffi cult
to access, in which case a
servo extension may be used for
binding. If using a bind plug, remove
after binding to prevent the system from
entering bind mode the next time the power is
turned on.

3. Put your transmitter in bind mode.

4. The bind process is complete when the orange LED on the receiver is solid.

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Failsafe

In the unlikely event the radio link is lost during use, the receiver will enable
the selected failsafe mode. Smart Safe + Hold Last is the default failsafe mode
on the AR637T. Preset Failsafe and SAFE Failsafe modes are only available
through Forward Programming.

SmartSafe + Hold Last

If loss of signal occurs, SmartSafe™ technology moves the throttle channel to
the failsafe position (low throttle) set during binding. All other channels will hold
their last position. When the receiver detects the signal from the transmitter,
normal aircraft operation resumes.

Preset Failsafe

With preset failsafe, you can set the specifi c control surface positions you
want to use if the signal is lost. When the receiver detects the signal from the
transmitter, normal aircraft operation resumes.
Preset failsafe mode is only available through Forward Programming.

SAFE Failsafe

SAFE Failsafe mode will work to automatically level your aircraft if the signal is
lost. In the forward programming menu you can select the bank and pitch an­gles the aircraft will attempt to maintain during failsafe. We recommend setting
bank and pitch angles so the aircraft fl ies a gentle gliding turn, preventing a fl y­away. You must complete First Time SAFE Setup before this option is available.
SAFE Failsafe mode is only available through Forward Programming.

Testing Failsafe

Secure the aircraft on the ground and remove the propeller. Test Failsafe
settings by turning the transmitter RF output off and noting how the receiver
drives the control surfaces.

Receiver Power Only

• The servo ports will not have a control signal if the receiver is turned on
when no transmitter signal is present.

• All channels have no output until the receiver has linked to the transmitter.

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Initial Setup

1. Verify your transmitter is updated to the latest Spektrum AirWare™ software

to take advantage of Forward Programming. See your transmitter manual
for updating instructions.

2. Install

the receiver in your airplane.

3. Bind the receiver to your transmitter.

4. Complete the airplane setup on your transmitter including wing type, tail type, channel

assignments, mixing, sub trim and travel the same as you would for any other aircraft
without AS3X. Verify the center of gravity is correct and test fl y your aircraft.

IMPORTANT: Do not use open mixes for fl ight control surfaces when setting
up a model with the AR637T for AS3X and SAFE. Only use wing and tail type
options to confi gure fl ight controls, refer to your transmitter manual for more
information about wing and tail type features.

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AR637T Receiver- Basic AS3X Setup

To use AS3X technology with the Spektrum AR637T Receiver, the receiver needs
to be set up with a compatible Spektrum transmitter.

1. Verify the basic setup and trim is accurate before attempting AS3X setup.

2. Forward Programming Setup: The receiver is directly confi gured through

the Forward Programming menu.

1. Low throttle is required to enter Forward Programming, we recommend
enabling throttle cut and verify it prevents motor operation. The
transmitter will not allow you to enter the Forward Programming menu
unless throttle is low or throttle cut is activated.

2. In your transmitter’s menu, select:
Forward Programming -> Gyro Settings -> First Time Setup
The transmitter will prompt you for all setup steps.

IMPORTANT: Before proceeding with setup, read every information screen that
appears on your transmitter
Select NEXT at the bottom of each page to continue.

3. Follow the on-screen prompts to set the orientation. Select
complete the two-step auto detection process, or select

Set Orientation Manually

4. You can a

ssign any open channel to a switch (trimmer, knob, etc) for gain,
and assign that channel for gain. You can assign a switch to a channel
from

the Forward Programming menu so you don’t have to exit the

menu.

We recommend using a trim

enable you to change the gain value on the fl y.
When the setup screens are complete select Apply.

. Verify the orientation is correct.

mer, knob, or slider for gain, which will

3. AS3X Tuning Basics:

1. Perform a control surface direction test, and AS3X reaction test.

2. Test fl y the airplane to verify the confi guration. In-fl ight trim changes do
not require any further updates. If the airplane needs sub-trim, travel or
other setup changes in the transmitter programming, select

Forward Programming -> Gyro Settings -> System Settings ->
Relearn Servo Settings after making the needed changes.

3. Oscillation occurs because the system is overshooting the correction, and
will usually occur at higher speeds. If the airplane oscillates, immediately
reduce speed and lower the gain value. Take note of which axis the
aircraft oscillates around; you can increase or decrease the base gain
values of each axis separately within the Forward Programming menu
after landing.

4. Increase the gain values until you fi nd oscillation, and then reduce the
gain to the highest setting that will not cause oscillation at any speed.
This value will help the airplane track accurately and fl y smoothly in
wind and turnbulence.

Continue

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8

AS3X Reaction Test

This test ensures that the AS3X control system is functioning properly.

1. Assemble the aircraft, bind your transmitter to the receiver, and complete the

AS3X First Time Setup in the Forward Programming menu before performing
this test.

2. Raise the throttle above 25% to activate AS3X, then lower the throttle. Once

the AS3X system is active, control surfaces move in respose to aircraft
movement. AS3X remains active until the battery is disconnected.

CAUTION: Activate throttle cut to prevent motor operation during

this test.

3. Move the aircraft as shown and ensure the control surfaces move in the

direction indicated in the graphic. If the control surfaces do not respond as
shown, do not fl y the aircraft.

Aircraft Movement Control Surface Reaction

RudderElevator

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Aileron

4. If the control surfaces do not respond as shown, review the receiver

mounting orientation.

1. In your transmitter’s menu select

Forward Programming -> Gyro Settings -> System Setup -> Orientation

2. Verify the receiver orientation matches the selected diagram. The image
of the airplane is from the top. If your access to the receiver is from the
bottom, remember the images on the screen need to match the way the
receiver sits in the model when it is upright.

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AR637T Receiver- SAFE Setup

Setting up SAFE Technology on the AR637T Receiver takes place in Forward
Programming.

1. Complete the AS3X setup and verify operation in fl ight.

2. Forward Programming Setup: To add SAFE fl ight stabilization the Flight

Modes on the receiver need to be confi gured.

1. In your transmitter’s menu select

Forward Programming

IMPORTANT: Before proceeding with setup, read every information screen that

will appear on your transmitter screen.
Select NEXT at the bottom of each page to continue.

2. Select FM Channel-> Select the channel and switch you want to use
for Flight Mode selection. You can select any channel that is not a control
surface, throttle or gain. Select Continue.

3. Position the model in a level fl ight attitude, then select
Level Model and Capture Attitude to teach the receiver the baseline
setting. For taildragger aircraft be sure to raise the tail so the fuselage is level.

4. Assign SAFE to the desired fl ight modes. You can enable or disable SAFE
for each fl ight mode. Take into account your fl ight mode switch position,
and set the SAFE Mode as desired for the fi rst switch position.

• Envelope (Intermediate) mode does not use self leveling. The aircraft

will fl y like a normal AS3X setup, but it will be bank and pitch angle limited.

• Self Leveling/Angle Demand will make the airplane return to level

fl ight when the control stick is centered.

5. Set the Angle Limits as desired for the fi rst switch position. These
values determine how far the aircraft will be allowed to pitch or bank.

6. Move the Flight Mode switch to the other positions, a setup screen for
SAFE Mode and Angle Limits will appear for each mode. Set the SAFE
Mode and Angle Limits as desired for every mode.

7. After all the Flight Modes are confi gured as desired for SAFE Modes and Angle
Limits, press Apply.

8. Test fl y the airplane to verify the confi guration.

3. Tuning SAFE Basics:

1. Perform a control surface direction test, and AS3X reaction test. You can verify
which modes have SAFE enabled by performing the AS3X test, starting at the
level fl ight attitude.

• AS3X reaction will move the control surfaces in response to rotational
movement, and then return to center when the rotation stops.

• SAFE (Self Leveling) will
as the aircraft is banked or pitched.

2. Test fl y the airplane to verify the confi guration in every fl ight mode.

3. If the airplane oscillates, immediately slow it down and reduce gain. Take note
of which fl ight mode you are in and which axis the aircraft oscillates around. You
can increase or decrease the base gain values of each axis separately for each
fl ight mode within the Forward Programming menu after landing.

4. Tune gain values for each axis within each fl ight mode.

->

Gyro Settings

cause the control surfaces to stay defl ected as long

->

First Time SAFE Setup

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Advanced Tuning

Basic gain tuning can be as simple as using a slider, but to fi ne tune the AS3X
system there are many setup and tuning options.

AS3X Gain tuning options

1. In your transmitter’s menu select

Forward Programming -> Gyro Settings -> AS3X Settings

• AS3X Gains can be changed for each axis, you can increase the gain values

for roll, pitch and yaw separately to maximize the performance without
oscillation. We recommend making small changes on one axis at a time.

• Priority tells the receiver how much to reduce gain when you move the
control stick away from center. If the Priority is set high (200) the receiver
will lower gain to zero with any movement on the control stick. Low
priority values will dampen more throughout the control input range. The
default value of 160 provides a well balanced feel for most pilots.

• If your aircraft is over or under sensitive to the range of gain available,
adjust the Gain Sensitivity. Agile aircraft with extreme control surface
defl ections or high speed aircraft should use 1X. Moderate sport airplanes
should use 2X. Slow and inherently stable aircraft with mild performance
should use 4X.

2. Test fl y your airplane to verify the confi guration, land, and make adjustments

as necessary.

Flight Mode tuning options within Forward Programming
(in the receiver)

1. Flight Modes in Forward Programming are set up in the receiver and are

separate from Flight Modes set up outside of Forward Programming. You can set
base gain values, and enable or inhibit AS3X and SAFE for each Flight Mode.
Select Forward Programming -> Gyro Settings -> F-Mode Setup

1. Select FM Channel, assign a channel and switch to use for Flight Modes.
Select any channel that is not a control surface, throttle or gain.

TIP: If you have completed the First Time SAFE Setup, your Flight Modes will
already be assigned to a switch.

2. Each Flight Mode within Forward Programming can have AS3X and SAFE
enabled or disabled. For all fl ight modes with SAFE enabled, AS3X should
be enabled as well. Take into account your fl ight mode switch position,
then set the AS3X and SAFE Modes as desired for that switch position.

TIP: If you have not completed the First Time SAFE Setup, you will not see any
SAFE related options on the F-Mode Setup Screens.

3. SAFE Flight Modes have an AS3X gain and a SAFE gain for pitch and roll axis.
Both of these values are used for SAFE and may be tuned independently.

4. Enable the Panic function if you want to be able to trigger Panic (bailout)
from that fl ight mode. This setting only defi nes if Panic is accessible from
the selected Flight Mode. Complete Panic Mode Setup under
Forward Programming -> System Setup -> SAFE/Panic Mode Setup

5. For Modes with SAFE self leveling/angle demand, you can choose to
enable High Thr to Pitch and/or Low Thr to Pitch or not.

6. Move the Flight Mode switch to the other positions; a setup screen will
appear for each mode. If Panic is not enabled on a selected mode, you
will not be able to trigger Panic when you are in that Flight Mode. Set the
SAFE Mode and Angle Limits as desired for every mode.

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When you add Flight Modes within Forward Programming, additional tuning

2.

options are added in the AS3X Setting menu. Be sure to change through all
the fl ight modes with your assigned switch and verify values for each feature
for every fl ight mode.
Select Forward Programming -> Gyro Settings -> AS3X Settings

• AS3X Gains can be adjusted for each axis and each mode. Change the
fl ight mode switch position when this option is selected and a separate
screen will appear for AS3X gains on each fl ight mode. Adjust the values
in each mode and each axis as needed.

• Priority screens will also appear for each fl ight mode, adjust the values
as desired.

• Heading screens will appear for each fl ight mode and are defaulted to
zero. You can increase this value to make the aircraft hold its attitude
when control input is neutral. Heading gain on the yaw axis is generally
not recommended because it will require the pilot to steer the aircraft
through any heading changes.

• Fixed/Adjustable Gain will let you use fi xed values or adjust the gain
from the assigned Gain channel. Each Flight Mode has a separate
screen with a separate set of values so each axis can be set to Fixed or
Adjustable in each Flight Mode.

• Capture Gyro Gains lets you easily set your base gain setting. If you are
using a slider, knob or trimmer to adjust gain when test fl ying, you can set
the value you arrive at as the base gain setting in the fl ight modes using
this function. Select this option from the AS3X Settings menu, verify fl ight
mode, verify the slider, knob or trimmer is in the desired position, and
select Capture Gyro Gains to set the values for the chosen Flight Mode.

Adding Flight Modes outside of Forward Programming
(in the transmitter)

Flight Modes outside of forward programming are set up in the main transmitter
menu and are separate from Flight Modes set up within forward programming.
Flight Modes in the transmitter tie together transmitter-based features like dual
rates and expo, selected channels and positions, trim, and voice/sound features.

1. Select Model Setup -> Flight Mode Setup

Assign a switch for the fl ight mode selection. See your transmitter manual for
more information about setting up Flight Modes on your transmitter.

2. Select Model Setup -> Channel Assign

Link the functions by assigning the Flight Mode channel. Select the same
Flight Mode channel you picked within forward programming, set the switch
to Flight Mode.

3. Select Model Setup -> Digital Switch Setup

Match the Flight Mode functions. Select Flight Mode in the switch selection,
a set of values appears for each fl ight mode.
Set Flight Mode 1 to 100%, Flight Mode 2 to 0%, and Flight Mode 3 to -100%.

4. Select Forward Programming -> Gyro Settings -> F-Mode Setup

Verify the fl ight modes change as expected when moving the Flight Mode
Switch.

5. (Only applies to transmitter with trimmer switches, DX9 and higher)

If you wish to be able to run a trimmer for gain independent for each fl ight
mode, Select Model Setup -> Trim Setup
Select F-Mode for the trimmer that is assigned to gain.

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SAFE Setting menu.

The

First Time SAFE Setup

tune the SAFE system there are many setup and tuning options.
Select Forward Programming -> Gyro Settings -> SAFE Settings ->

• SAFE Gains can be fi ne tuned for each axis within each Flight Mode.

• Angle Limits can be changed for each fl ight mode

• Fixed/ Adjustable Gain operates the same as this feature in AS3X, but

applies to SAFE gain. You can assign a separate SAFE gain channel for roll
and pitch if you have enough free channels. Use a different gain channel for
SAFE gain than what you have assigned for AS3X. It is possible to have up
to fi ve different channels assigned for fi ne tuning gain. AS3X roll, pitch and
yaw, and SAFE roll and pitch. If you are limited by channels, make your gain
changes within Forward Programming.

• Capture Gyro Gains operates the same as this feature in AS3X, but applies

to SAFE operation

(AS3X) System Setup
Select Forward Programming -> Gyro Settings -> System Settings ->

• Relearn Servo Settings can be accessed if any changes are made to the

model confi guration outside of Forward Programming. If any changes are
made to servo reversing, travel, sub-trim, wing type or tail type, you can
execute this function instead of restoring factory defaults and redoing the
entire setup.

• Orientation can be changed from this menu if the receiver mounting is changed.

• Gain Channel enables you to change the channel you are using to manage gain.

• SAFE/Panic Mode Setup

1. Panic
Select a channel to trigger Panic mode. Chose any channel that is not
used for a control surface, throttle, fl ight modes, or gain. We recommend
assigning the momentary I button for Panic.

Delay will cause a two second delay when exiting panic mode
Panic Flight Mode selects a Flight Mode to pull the gain values from for

Panic operation; select a Flight Mode that is setup with SAFE
Roll and Pitch values on this page represent angle limits while in Panic mode.

2. Throttle To Pitch
Low Thr to Pitch Threshold determines the trigger point below which
the airplane will descend nose down at the chosen angle.
High Thr to Pitch Threshold determines the trigger point above which
the airplane climbs at the chosen angle.

3. Attitude Trim allows you to redo the Capture Level Flight Attitude, and/or
manually fi ne tune the values based on fl ight testing.

4. SAFE Failsafe Flight Mode allows you to select a fl ight mode (with
SAFE confi gured) to act as a failsafe mode. Making this selection enables
SAFE Failsafe.

5. Failsafe Angles determine the attitude the aircraft will maintain in the
event of a failsafe. Set pitch and bank angles to hold the aircraft in a
gentle gliding turn, preventing a fl yaway.

• Utilities -> Copy Flight Mode Settings

Select a Source and Target Flight Mode to transfer all Flight Mode settings
from one Flight Mode to another. All settings in the Target Flight Mode will be
overwritten.

should be suffi cient to fl y your airplane, but to fi ne

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Other Settings (Forward Programming)

System Setup
Select Forward Programming -> Other Settings ->

• Select Failsafe -> Select each channel and assign it to Preset or Hold Last.

When you select a different channel for Output, a new group of settings appears.
Capture Failsafe Positions ->
Hold the control sticks in the desired failsafe positions and select Apply.
Channel selections must be individually set in Forward Programming to apply
the preset positions or each channel will default to Hold Last. The value
captured will be refl ected in the position shown for each channel.

• Initiate Receiver Bind Mode

Gives you the option of putting the receiver into Bind Mode from this menu.

• Factory Reset

Select this option to put the receiver back to factory defaults.
All settings will be wiped with this selection.

• Restore From Backup

Select this option to re-instate the model fi le saved into backup.

• Save to Backup

The AR637T can store a second model setup fi le for backup. Use this option
if you want to store the settings you have while you test setup changes.

SAFE (Self Leveling) Flying Tips

When fl ying in SAFE Self Leveling/Angle Demand mode, the aircraft will return
to level fl ight any time the aileron and elevator controls are at neutral. Applying
aileron or elevator control will cause the airplane to bank, climb or dive. The
amount the stick is moved will determine the attitude the airplane fl ies. Holding
full control will push the aircraft to the pre-determined bank and roll limits, but
it will not go past those angles.

When fl ying with Self Leveling/Angle Demand, it is normal to hold the control
stick defl ected with moderate to full aileron input when fl ying through a turn. To
fl y smoothly with Self Leveling/Angle Demand, avoid making frequent control
changes and don’t attempt to correct for minor deviations. Holding deliberate
control inputs will command the aircraft to fl y at a specifi c angle, and the model
will make all corrections to maintain that fl ight attitude.

When fl ying with Self Leveling/Angle Demand, you have the option to enable
throttle to pitch angle demand. Throttle to pitch will make throttle dictate climb
angle. Full throttle will cause the aircraft to pitch up and climb slightly. Mid
throttle will keep the airplane fl ying level. Low throttle will cause the airplane to
descend slightly nose-down.

Return the elevator and aileron controls to neutral before switching from Self
Leveling/Angle Demand mode to AS3X mode. If you do not neutralize controls when
switching into AS3X mode, the control inputs used for Self Leveling/Angle Demand
mode will be excessive for AS3X mode and the aircraft will react immediately.

14

Differences between Self Leveling/Angle Demand and AS3X modes

This section is generally accurate but does not take into account fl ight speed,
battery charge status, and other limiting factors.

SAFE Beginner SAFE Intermediate

Control stick
is neutralized

Holding a
small amount
of control

Holding full
control

Control Input

Throttle
(Optional: Thr
to Pitch)

Aircraft will self level

Aircraft will bank or
pitch to a moderate
angle and maintain the
attitude

Aircraft will bank or pitch
to the predetermined
limits and maintain the
attitude

Full throttle: Climb
Mid throttle: Level fl ight
Low throttle: Descend
nose-down

Aircraft will continue to fl y
at its present attitude

Aircraft will continue to
pitch or roll slowly, and
stop at the prededermined
bank angle limits

Aircraft will continue to roll
or pitch rapidly, and stop
at the prededermined bank
angle limits

Throttle will not affect fl ight
response

AS3X

Control stick is neutralized

Holding a small amount of
control

Holding full control

Control Input

Throttle
(Optional: Thr to Pitch)

Channel Limitations

The AR637T can use up to seven extra channels for AS3X and SAFE functions;
one for Flight Mode selection, one for Panic Mode, and up to fi ve for Gain. You
may use any channel up to 20 that is not a control surface or throttle for these
functions, and you do not need to use channels 5 and 6, keeping those channels
and ports on the receiver open for normal servo operation. However, you may run
into channel limitations depending on the number of channels on your transmitter
and the number of channels you are using on the receiver.

TIP: If you are experiencing limitations because of channel count, here are a
few options;

• You can operate the AR637T without a channel assigned to Flight Mode, but
you will only have access to AS3X options, not SAFE.

• You can set up one self-leveling mode to serve as Panic Mode so you don’t
need to dedicate a separate channel for Panic Mode.

• You can operate the AR637T without a gain channel assigned, and just use
fi xed gain values throughout the confi guration. To do this, fi rst assign fl ight
mode to a channel, then change all gain values to fi xed for fl ight mode 1, then
you can unassign the fl ight mode channel and it will remain in fi xed.

Aircraft will continue to fl y at its
present attitude

Aircraft will continue to pitch or roll
slowly

Aircraft will continue to roll or pitch
rapidly

Throttle will not affect fl ight response

EN

15

EN

Flight Log

Flight Log data can help you optimize the control link for your aircraft. Flight
Log data is displayed on telemetry capable Spektrum transmitters.

Using the Flight Log

A - Fades on main receiver B - Fades on remote receiver
L - Not available on AR637T R - Not available on AR637T
F - Frame losses H - Holds

Fades

Represents the loss of one bit of information on one receiver. Fades are used to
evaluate the performance of each individual receiver. If a fade value is showing
higher than the others, inspect or reposition the antenna to optimize the RF link.

Frame Loss

A frame loss occurs when one complete data packet is missed. A single frame
loss does not represent a loss of control, but frame losses should be monitored.
In the air it's normal to experience as many as 100 frame losses per minute
of fl ight. On the ground the number of frame losses will be higher because the
signal is hampered by the dirt and moisture.

Hold

A hold occurs when 45 consecutive frame losses occur. This takes about one
second, and in this event the receiver moves the channel outputs to the failsafe
settings. If a hold ever occurs, it’s important to re-evaluate the system and
check every component. If your system displays a hold, diagnose the cause and
resolve the issue before fl ying again.

It is normal to see a hold logged if you power OFF your transmitter and back
ON.

IMPORTANT: The Spektrum Flight Log (SPM9540) is not compatible with
the AR637T receiver.

16

Range Testing

Before each fl ying session, and especially with a new model, it’s important to
perform a range check. All Spektrum aircraft transmitters incorporate a range
testing system, which reduces the output power to allow a range check.

1. With the model resting on the ground, stand approximately 100 feet (30

meters) away from the model.

2. Face the model with the transmitter in your normal fl ying position and put

your transmitter into range test mode.

3. You should have total control of the model in range test mode at 100 feet.

4. If you have control issues, review the fl ight log data to help reposition your

antenna(s), and repeat the range test.

5. If control issues persist, call Horizon Product Support for further assistance.

Advanced Range Testing

The standard range testing procedure is recommended for most sport aircraft.
For sophisticated aircraft that contain signifi cant amounts of conductive
materials (e.g. turbine powered jets, scale aircraft with metalized fi nishes,
aircraft with carbon fuselages, etc.), the following advanced range check will
confi rm that all receivers in the system are operating optimally as installed.
This advanced range check allows the RF performance of each receiver to
be evaluated independently. A telemetry-equipped Spektrum Transmitter is
required for the advanced range test.

1. Stand approximately 100 feet away from the model.

2. Face the model with the transmitter in your normal fl ying position and put

your transmitter into range test mode.

3. Have a helper position the model in various orientations (nose up, nose

down, nose toward the transmitter, nose away from the transmitter, etc.).

4. Observe the telemetry on your transmitter. Note any orientations that cause

higher fades or frame loss values. Perform this step for at least one minute.

5. Reposition any remote receivers showing higher fades as necessary.

6. Retest to verify satisfactory results.

7. Repeat as neccesary.

After one minute, advanced testing should yield:
H - 0 holds
F - Fewer than 10 frame losses

A, B - Fades will typically be fewer than 100. It’s important to compare the rela-
tive fades. If a particular receiver has a signifi cantly higher numnber of fades (2 to
3X) then the test should be redone. If the same results occur, move the offending
receiver to a different location.

TIP: Use the fade values for A to investigate the performance of the telemetry
link.

EN

17

EN

Receiver Power System Requirements

Some of the power system components that affect the power supply to the
receiver include:

• Receiver battery pack (number of cells, capacity, cell type, state of charge).

• The ESC’s capability to deliver adequate voltage to the receiver when the

servos demand high current

• The switch harness, battery leads, servo leads, regulators etc.

The AR637T has a minimum operational voltage of 3.5 volts; it is highly
recommended the power system be tested per the guidelines below.

Recommended Power System Test Guidelines

We recommend performing the following tests on any new setup to verify
power system performance:

1. View the receiver voltage during this test on your transmitter’s telemetry

screen

2. Load the control surfaces (apply pressure with your hand) while monitoring

the voltage at the receiver.

3. The voltage should remain above 4.8 volts even when all servos are loaded.

How QuickConnect™ Technology Works

• When the receiver voltage drops below 3.5 volts, the system ceases to operate.

• When power is restored, the receiver immediately attempts to reconnect.

• If the transmitter was left on, the system reconnects typically in about

4/100 of a second.

QuickConnect is designed to allow you to fl y safely through most short duration
power interruptions, however, the root cause of these interruptions must be
corrected before the next fl ight to prevent a crash.

NOTICE: If a brownout occurs in fl ight it is vital that the cause of the
brownout be determined and corrected.

Glossary

AS3X- Stabilization technology that dampens wind and turbulence. Designed to

support advanced fl yers, AS3X does not include self-leveling technology.
SAFE Envelope- (Intermediate Mode) Stabilization technology that uses AS3X
to deliver normal fl ight performance, but with limited bank and pitch angles to
prevent the airplane from getting into extreme attitudes.
SAFE Self Level/Angle Demand- Stabilization technology that will make the
airplane return to level fl ight when the control stick is centered.
Panic Mode- Sometimes called a bailout mode, Panic is a SAFE stabilization
mode that can return an airplane to level fl ight from any attitude. It is usually
assigned to a momentary button.
Flight Modes in Receiver- Determine what stabilization modes the aircraft
operates in. All the associated stabilization features to tune the fl ight stabilization
can be adjusted per Flight Mode in the receiver (Base Gain, Priority, Heading, etc).
Flight Modes in Transmitter- Manage rates, expo, voice/sound output, and
other transmitter based confi gurations.

18

Heading- An optional feature of AS3X, heading will make the airplane try to hold

its attitude when the control is relaxed. This is not a self-leveling feature, it only
makes the aircraft track accurately.

Gain- Tells the stabilization system the level of damping it should provide.
SRXL2- A Bi-Directional data communication protocol that enables digital devices

to communicate over a single signal wire.
Forward Programming- Programming directly on the receiver from the
transmitter. The receiver has all screens, menus and settings in its internal
memory. The receiver is using the telemetry link to the transmitter for the
interface, the screen and buttons.

Throttle Cut- Disables throttle function
Oscillation- Sometimes called a wag, this is a back and forth movement similar

to a vibration that may appear like a wobble. It may occur around any axis, roll,
pitch or yaw. It is most likely to occur on one axis, not all three.
Overshoot- When the stability system makes corrections it is a balancing act,
if the response is too strong the system will go past where it should stop, this is
called an overshoot.
Angle Limits- Only available in SAFE modes, these values defi ne the limits for
the bank and pitch angles.
High Thr to Pitch- This setting defi nes the angle the airplane will climb at when
the throttle is raised above half. This is only available in Self Leveling modes.
Low Thr to Pitch- This setting defi nes the angle the airplane will descend at when
the throttle is lowered below half. This is only available in Self Leveling modes.
Brownout- If the receiver power supply drops below 3.5volts, the receiver will
not have suffi cient power for operation and the resulting loss of control is call a
brownout. A brownout results from an inadequate power supply to the reciever, it
is a failure outside of the receiver.

Optional Accessories

Optional Accesories

SPMA3065 USB Programming Cable
SPM9747 SRXL2 DSMX Remote Receiver
SPM4651T SRXL2 DSMX Remote Receiver

Telemetry Sensors and Accesories

SPMA9574 Aircraft Telemetry Airspeed Indicator
SPMA9589* Aircraft Telemetry Altitude and Vertical Speed Sensor*
SPMA9569 Aircraft Telemetry RPM Sensor and Bracket
SPMA9558 Brushless RPM Sensor
SPMA9587 Aircraft Telemetry GPS Sensor
SPMA9556 Air Telemetry Flight Pack Voltage Sensor: EC3/IC3
SPMA9604 Aircraft Telemetry Receiver Battery Energy Sensor
SPMA9605** Aircraft Telemetry Flight Pack Batt Energy Sensor**
SPMA9551 12" Aircraft Telemetry Extension
SPMA9552 24" Aircraft Telemetry Extension

*Only applicable for AR637TA receivers included with BNF models. SPMA9589
functions are already integrated in the SPMAR637T.

**For use with electric power system batteries that are separate from the
receiver battery(s).

EN

19

EN

Troubleshooting Guide AS3X

Problem Possible Cause Solution

Oscillation

Inconsistent
fl ight
performance

Incorrect
response to the
AS3X Control
Direction Test

Damaged propeller or
spinner

Imbalanced propel­lereller

Motor vibration

Loose receiver

Loose aircraft
controls

Worn parts

Irregular servo
movement

Gain too high Reduce Gain

Travel or Rates
reduced causing
reduced servo
resolution

Trim changes after
initial setup

Changes to Sub­Trim after initial
setup

Aircraft was not
kept immobile for
5 seconds after
battery connection

Incorrect direction
settings in the
receiver, which can
cause a crash

Replace propellereller or spinner

Balance the propellereller

Replace parts or correctly align
propellereller or other parts and
tighten fasteners as needed

Align and secure receiver in
fuselage

Tighten or otherwise secure parts
(servo, arm, linkage, horn and
control surface)

Replace worn parts (especially
propellereller, spinner, or servo)

Replace servo and/or servo
extension(s)

Move pushrod in on servo horn,
or move pushrod out on control
horn, and increase travel and/or
rates. Use the full servo travel to
achieve the desired throw.

If you adjust trim more than
8 clicks, select Relearn Servo
Settings in the Forward
Programming menu after landing

If you need to trim the aircraft
during test fl ights, select Relearn
Servo Settings in the Forward
Programming menu after landing

With the throttle stick in lowest
position. Disconnect battery, then
reconnect battery and keep the
aircraft still for 5 seconds.

DO NOT fl y. Correct the direction
settings, then fl y.

20

Troubleshooting Guide

Problem Possible Cause Solution

Aircraft will not
respond to throttle
but responds to
other controls

Aircraft will not
Bind (during bind­ing) to transmitter

Throttle not at idle
and/or throttle trim
too high

Throttle servo travel is
lower than 100%

Throttle channel is
reversed

Motor disconnected
from ESC

Transmitter too near
aircraft during binding
process

Aircraft or transmitter
is too close to large
metal object, wireless
source or another
transmitter

The bind plug is not
installed correctly in
the bind port

Flight battery/
transmitter battery
charge is too low

Bind button not held
long enough during
bind process

Reset controls with throttle
stick and throttle trim at lowest
setting

Make sure throttle servo travel
is 100% or greater

(With battery disconnected from
aircraft) Reverse throttle channel
on transmitter

Make sure motor is connected
to the ESC

Move powered transmitter a few
feet from aircraft, disconnect
and reconnect fl ight battery to
aircraft

Move aircraft and transmitter
to another location and attempt
binding again

Install bind plug in bind port
and bind the aircraft to the
transmitter

Replace/recharge batteries

Power off and repeat bind
process.

EN

21

EN

Problem Possible Cause Solution

Transmitter too near
aircraft during connecting
process

Aircraft or transmitter is
too close to large metal
object, wireless source or

Aircraft will not
connect (after
binding) to
transmitter

Control surface
does not move

another transmitter

Bind plug left installed in
bind port

Aircraft bound to different
model memory.

Flight battery/Transmitter
battery charge is too low

Transmitter may have
been bound to a different
aircraft using different
DSM protocol

Control surface, control
horn, linkage or servo
damage

Wire damaged or
connections loose

Transmitter is not bound
correctly or the incorrect
model was selected

Flight battery charge
is low

BEC (Battery Elimination
Circuit) of the ESC is
damaged

Move powered transmitter a few
feet from aircraft, disconnect
and reconnect fl ight battery to
aircraft

Move aircraft and transmitter
to another location and attempt
connecting again

Rebind transmitter to the aircraft
and remove the bind plug
before cycling power

Select correct model memory
on transmitter

Replace/recharge batteries

Rebind aircraft to transmitter

Replace or repair damaged
parts and adjust controls

Perform a check of wires and
connections, connect or replace
as needed

Rebind or select correct
airplanes in transmitter

Fully recharge fl ight battery

Replace ESC

22

1-YEAR LIMITED WARRANTY

What this Warranty Covers - Horizon Hobby, LLC, (Horizon) warrants to the original

purchaser that the product purchased (the “Product”) will be free from defects in
materials and workmanship for a period of 1 year from the date of purchase.

What is Not Covered - This warranty is not transferable and does not cover
(i) cosmetic damage, (ii) damage due to acts of God, accident, misuse, abuse,
negligence, commercial use, or due to improper use, installation, operation or
maintenance, (iii) modifi cation of or to any part of the Product, (iv) attempted service
by anyone other than a Horizon Hobby authorized service center, (v) Product not
purchased from an authorized Horizon dealer, (vi) Product not compliant with
applicable technical regulations, or (vii) use that violates any applicable laws, rules,
or regulations.
OTHER THAN THE EXPRESS WARRANTY ABOVE, HORIZON MAKES NO OTHER
WARRANTY OR REPRESENTATION, AND HEREBY DISCLAIMS ANY AND ALL
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE. THE PURCHASER ACKNOWLEDGES THAT THEY
ALONE HAVE DETERMINED THAT THE PRODUCT WILL SUITABLY MEET THE
REQUIREMENTS OF THE PURCHASER’S INTENDED USE.

Purchaser’s Remedy - Horizon’s sole obligation and purchaser’s sole and
exclusive remedy shall be that Horizon will, at its option, either (i) service, or (ii)
replace, any Product determined by Horizon to be defective. Horizon reserves
the right to inspect any and all Product(s) involved in a warranty claim. Service or
replacement decisions are at the sole discretion of Horizon. Proof of purchase is
required for all warranty claims. SERVICE OR REPLACEMENT AS PROVIDED UNDER
THIS WARRANTY IS THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY.
Limitation of Liability - HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION
OR COMMERCIAL LOSS IN ANY WAY, REGARDLESS OF WHETHER SUCH CLAIM
IS BASED IN CONTRACT, WARRANTY, TORT, NEGLIGENCE, STRICT LIABILITY OR
ANY OTHER THEORY OF LIABILITY, EVEN IF HORIZON HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. Further, in no event shall the liability of Horizon
exceed the individual price of the Product on which liability is asserted. As Horizon
has no control over use, setup, fi nal assembly, modifi cation or misuse, no liability
shall be assumed nor accepted for any resulting damage or injury. By the act of use,
setup or assembly, the user accepts all resulting liability. If you as the purchaser or
user are not prepared to accept the liability associated with the use of the Product,
purchaser is advised to return the Product immediately in new and unused condition
to the place of purchase.

Law - These terms are governed by Illinois law (without regard to confl ict of law
principals). This warranty gives you specifi c legal rights, and you may also have
other rights which vary from state to state. Horizon reserves the right to change or
modify this warranty at any time without notice.

WARRANTY SERVICES

Questions, Assistance, and Services - Your local hobby store and/or place of
purchase cannot provide warranty support or service. Once assembly, setup or use
of the Product has been started, you must contact your local distributor or Horizon
directly. This will enable Horizon to better answer your questions and service you in
the event that you may need any assistance. For questions or assistance, please
visit our website at www.horizonhobby.com, submit a Product Support Inquiry at

EN

23

EN

https://www.horizonhobby.com/content/service-center-render-service-center or
call the toll free telephone number referenced in the Warranty and Service Contact
Information section to speak with a Product Support representative.

Inspection or Services - If this Product needs to be inspected or serviced
and is compliant in the country you live and use the Product in, please use the
Horizon Online Service Request submission process found on our website or call
Horizon to obtain a Return Merchandise Authorization (RMA) number. Pack the
Product securely using a shipping carton. Please note that original boxes may
be included, but are not designed to withstand the rigors of shipping without
additional protection. Ship via a carrier that provides tracking and insurance for lost
or damaged parcels, as Horizon is not responsible for merchandise until it arrives
and is accepted at our facility. An Online Service Request is available at http://
www.horizonhobby.com/content/_service-center_render-service-center. If you do
not have internet access, please contact Horizon Product Support to obtain a RMA
number along with instructions for submitting your product for service. When calling
Horizon, you will be asked to provide your complete name, street address, email
address and phone number where you can be reached during business hours.
When sending product into Horizon, please include your RMA number, a list of the
included items, and a brief summary of the problem. A copy of your original sales
receipt must be included for warranty consideration. Be sure your name, address,
and RMA number are clearly written on the outside of the shipping carton.
Provided warranty conditions have been met, your Product will be serviced or
replaced free of charge. Service or replacement decisions are at the sole discretion
of Horizon.

NOTICE: Do not ship LiPo batteries to Horizon. If you have any issue
with a LiPo battery, please contact the appropriate Horizon Product
Support offi ce. Warranty Requirements- For Warranty consideration,
you must include your original sales receipt verifying the proof-of­purchase date.

Non-Warranty Service - Should your service not be covered by warranty, service

will be completed and payment will be required without notifi cation or estimate
of the expense unless the expense exceeds 50% of the retail purchase cost. By
submitting the item for service you are agreeing to payment of the service without
notifi cation. Service estimates are available upon request. You must include this
request with your item submitted for service. Non-warranty service estimates will be
billed a minimum of ½ hour of labor. In addition you will be billed for return freight.
Horizon accepts money orders and cashier’s checks, as well as Visa, MasterCard,
American Express, and Discover cards. By submitting any item to Horizon for
service, you are agreeing to Horizon’s Terms and Conditions found on our website
http://www.horizonhobby.com/content/_service-center_render-service-center.

ATTENTION: Horizon service is limited to Product compliant in the
country of use and ownership. If received, a non-compliant Product will
not be serviced. Further, the sender will be responsible for arranging
return shipment of the un-serviced Product, through a carrier of the
sender’s choice and at the sender’s expense. Horizon will hold non­compliant Product for a period of 60 days from notifi cation, after which
it will be discarded.

10/15

24

Warranty and Service Contact Information

EN

Country of
Purchase

United States
of America

Horizon Hobby Contact Information Address

Horizon Service

EU

Center

(Repairs and

Repair Requests)

Horizon Product

Support

(Product Technical

Assistance)

Sales

Horizon

Technischer

Service

Sales: Horizon

Hobby GmbH

servicecenter.horizonhobby.com/

RequestForm/

[e-mail].

877-504-0233

[e-mail]

800-338-4639

[e-mail]

[phone]

2904 Research Rd.
Champaign, Illinois,

61822 USA

Hanskampring 9

D 22885

Barsbüttel,

Germany

FCC Information

FCC ID: BRWTIARLGTNG1
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.

However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of
the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

This device complies with part 15 of the FCC rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received, including
interference that may cause undesired operation.

NOTICE: Modifi cations to this product will void the user’s authority to
operate this equipment.

This product contains a radio transmitter with wireless technology which
has been tested and found to be compliant with the applicable regulations
governing a radio transmitter in the 2.400GHz to 2.4835GHz frequency range.

25

EN

When operating your Spektrum receiver, please be sure to maintain a
separation distance of at least 20 cm between your body (excluding fi ngers,
hands, wrists, ankles and feet) and the antenna to meet RF exposure safety
requirements as determined by FCC regulations.

Supplier’s Declaration of Conformity

Spektrum AR637T AS3X and SAFE 6 CH Receiver
SPMAR637T

This device complies with part 15 of the FCC Rules. Operation is subject

to the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.

CAUTION: Changes or modifi cations not expressly approved by the

party responsible for compliance could void the user’s authority to
operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference
in a residential installation. This equipment generates, uses and can radiate
radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of
the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

Horizon Hobby, LLC
2904 Research Rd.,
Champaign, IL 61822
Email: [e-mail]
Web: HorizonHobby.com

26

IC Information

IC: 6157A-TIARLGTNG1
CAN ICES-3 (B)/NMB-3(B)

This device complies with Industry Canada license-exempt RSS standard(s).
Operation is subject to the following two conditions: (1) this device may not
cause interference, and (2) this device must accept any interference, Including
interference that may cause undesired operation of the device.

Compliance Information for the European Union

Horizon Hobby, LLC hereby declares that this product is in
compliance with the essential requirements and other relevant provisions

of the RED Directive.
A copy of the EU Declaration of Conformity is available online at:
http://www.horizonhobby.com/content/support-render-compliance
Frequency Band: 2402 - 2478 MHz
Max EIRP: 20dBm

Instructions for Disposal of WEEE by Users in the European Union

This product must not be disposed of with other waste. Instead, it is the
user’sresponsibility to dispose of their waste equipment by handing it over
to adesignated collection point for the recycling of waste electrical and

electronic equipment. The separate collection and recycling of your waste
equipment at the time of disposal will help to conserve natural resources and ensure
that it is recycled in amanner that protects human health and the environment. For
more information about where you can drop off your waste equipment for recycling,
please contact your local city offi ce, your household waste disposal service or where
you purchased the product.

EN

27

© 2020 H orizon Hobby, LL C.
DSM, DSM2, DSM X, SAFE, AS3X, Spek trum Airware, SRX L2, Smart Safe, Hangar 9 an d the
Horizo n Hobby logo are t rademarks or r egistered trademarks of Hor izon Hobby, LLC.
The Spe ktrum trade mark is used wit h permission o f Bachmann Industrie s, Inc.
JR is a registered trade mark of JR Amer icas. All othe r trademarks , service mar ks and logos
are pro perty of the ir respecti ve owners.
US 7,391,320. US 9,056,667. US 9,753,457. US 9,930,567. US 10,078,329. US 10,419,970.

59642.2
Creat ed 03/20 SPMAR637 T