Applicable systems: Futaba T-FHSS Air-2.4GHz system transmitter 

R3008SB T-FHSS Air-2.4GHz Bidirectional Communication System

S.BUS2 / S.BUS Port and 8 Channels for Conventional System Receiver

Compliance Information Statement 

(for U.S.A.)

This device, trade name Futaba Corporation, model number R3008SB, complies with 

part15 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.

(3) This module meets the requirements for a mobile device that may be used at separation 

distances of more than 20cm from human body.

To meet the RF exposure requirements of the FCC this device shall not be co-located with 

another transmitting device.

The responsible party of this device compliance is:

Futaba Service Center

3002 N Apollo Drive Suite 1, Champaign, IL 61822 U.S.A.

TEL (217)398-8970 or E-mail: futabaservice@hobbico.com (Support)

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T-FHSS Air-2.4GHz system/S.BUS2 and S.BUS port and 8 channels for 

conventional system receiver

• Dual antenna diversity

• Size: 0.98 x 1.86 x 0.56 in. (24.9 x 47.3 x 14.3 mm)

• Weight: 0.36 oz. (10.1g)

• Power requirement: 4.8V to 7.4V

• Battery F/S Voltage: It sets up with a transmitter

• Extra Voltage port: 0 ~ 70V DC

* Be sure that when using ESCs regulated output the capacity of the ESC must 

meet your usage condition.

Thank you for purchasing a Futaba R3008SB T-FHSS Air-2.4GHz compatible receiver. The R3008SB receiver features bi-directional communication 

with a T-FHSS Air-2.4GHz Futaba transmitter using the S.BUS2 port. Using the S.BUS2 port an impressive array of telemetry sensors may be utilized. 

It also includes both standard PWM output ports and S.BUS output ports.

LED Indication

Green Red Status

Off Solid No signal reception

Solid Off Receiving signals

Alternate blink Unrecoverable error (EEPROM, etc.)

(Antenna installation)

90 ̊

Please refer the table below 

for LED status vs receiver's 

condition.

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It connects the battery 

for power, etc.

External voltage input 

cable of an option is 

used. The voltage of 

the battery can be 

displayed with a 

transmitter. 

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Usage precaution

• Futaba T-FHSS Air system does not work with current Futaba TFHSS / S-FHSS / FHSS / FASST / FASSTest system. 

• The R3008SB receiver can only be used with T-FHSS Air capable 

transmitters.

• Don't connect Extra Voltage before turning on a receiver.

WARNING

Changes or modification not expressly approved by the party 

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

equipment.

The R3008SB receiver should be protected from vibration by foam 

rubber, Velcro or similar mounting methods. Protect from moisture.

Keep away from conductive materials to avoid short circuits.

Antenna installation precaution

Don't cut or bundle the receiver antenna wire. 

Don't bend the coaxial cable. It causes damage.

The antennas must be mounted in such a way to assure they are 

strain relieved. 

Keep the antenna as far away from the motor, ESC and other noise 

sources as you possibly can.

Be sure that the two antennas are placed at 90 degrees to each other.

• The R3008SB 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 fly problem-free.

Antenna installation for carbon fuselage

WARNING

You must leave 30mm at the tip of the antenna fully exposed. The exposed antenna should be secured so that it cannot move around or back 

inside of your aircraft. 

S.BUS2 precaution 

DANGER

Don't connect a connector, as shown right.

• It will be a short-circuit, if it connected in 

this way. A short circuit across the battery 

terminals may cause abnormal heat, fire 

and burning.

Don't connect servo for conventional system to S.BUS/S.BUS2 port.

• Digital servo for conventional system→ It does not operate.

• Analog servo → It may cause abnormal heat, fire and burning.

WARNING

Only S.BUS2 capable devices may be connected the S.BUS2 port. 

Standard S.BUS servos and gyros should not be connected the S.BUS2 

port.

(Typical installation)

CH Mode B

Battery(7/B)S.BUS2

S.BUS(8/SB)

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DANGER

Do not insert either a switch 

or battery in this manner.

本產品符合低功率電波輻射性電機管理辦法 第十二條、第十四條等條文規定

1. 經型式認證合格之低功率射頻電機,非經許可,公司、商號或使用者均不得擅自變更頻率、加

大功率或變更原設計之特性及功能。

2. 低功率射頻電機之使用不得影響飛航安全及干擾合法通信;經發現有干擾現象時,應立即停用,

並改善至無干擾時方得繼續使用。前項合法通信,指依電信法規定作業之無線電通信。低功率

射頻電機須忍受合法通信或工業、科學及醫療用電波輻射性電機設備之干擾。

*Default setting S.BUS, 

don't connect servo for 

conventional system. 
WARNING

Do not perform the linking procedure while the motor's main wire connected or the engine is operating as it may result in serious injury.

When the linking is complete, please cycle the receiver power and ensure the receiver is properly linked to the transmitter.

Please power up your system in this order. Transmitter first, followed 

by the receiver. 

FUTABA CORPORATION

1080 Yabutsuka, Chosei-mura, Chosei-gun, Chiba-ken, 299-4395, Japan

Phone: +81 475 32 6982, Facsimile: +81 475 32 6983

Link to the transmitter

Easy Link ID allows T-FHSS Air receivers to link to compatible 

transmitter without pressing the link button on the receiver. 

1 Bring the transmitter and the receiver close to each other, 

within 20 inches (half meter).

2 Turn on the transmitter. Place the transmitter into the receiver 

linking mode.

3 Turn on the receiver.

4 The receiver will wait for the linking process to begin for 3 

seconds. Following that it will return to the normal operation 

mode.

5 When the LED of the receiver changes from blinking red to 

solid green, linking is completed.

 (A link waiting state is ended in 3 second.)

• Refer to the transmitters operation manual for complete details on how to place the 

transmitter into the linking mode.

• If there are many T-FHSS Air systems turned on in close proximity, your receiver 

might have difficulty establishing a link to your transmitter. This is a rare occurrence. 

However, should another T-FHSS Air transmitter/receiver be linking at the same 

time, your receiver could link to the wrong transmitter. This is very dangerous if you 

do not notice this situation. In order to avoid the problem,we strongly recommend 

you to double check whether your receiver is really under control by your 

transmitter. 

• If the System Type of the transmitter is changed, the receiver will need to be relinked to the transmitter.

Channel Modes

The R3008SB is capable of changing its channel allocations as described 

in the table below. 

1 Turn on the receiver. (At this moment, the transmitter should 

be off.) Then, LED blinks RED in about 3 seconds. Next, wait 

until it becomes solid RED.

2 Press and hold the Mode switch more than 5 seconds.

3 Release the button when the LED blinks RED and GREEN 

simultaneously.

4 The receiver is now in the "Operation CH Set" mode. At this 

moment, the LED indicates current set status through flashing 

a pattern that corresponds to the CH mode.


Cannot exit this CH setting mode before the operation mode is ¿xed.

**See the below table that shows correspondence between "CH mode" and way 

of Àashing LED.

***Default CH mode is "Mode B".

5 By pressing the Mode switch, the operation CH is switched 

sequentially as "Mode C" "Mode D" "Mode A"....

6 The operation mode will be set by pressing the Mode switch

more than 2 seconds at the desired CH mode.

7 Release the button when the LED blinks RED and GREEN 

simultaneously. Then, the operation CH is fixed.

8 After confirming the operation CH mode is changed, turn off 

and back on the receiver power.

*The “Operation CH Set” mode cannot be changed during the receiver 

communicates to the transmitter.

T-FHSS Air

T-FHSS Air is a bidirectional communication system between the 

R3008SB receiver and T-FHSS Air capable transmitters. Multiple 

optional telemetry sensors may be connected to the S.BUS2 on the 

receiver and that data is in turn displayed on the transmitter.

*Please see your transmitters operation manual to configure transmitter to 

operate with telemetry sensors.

S.BUS2

S.BUS2 extends S.BUS and supports bidirectional communication. 

Sensors are connected the S.BUS2 port.

*Only S.BUS2 capable devices may be connected the S.BUS2 port. 

Standard S.BUS servos and gyros should not be connected the S.BUS2 

port.

If the R3008SB receiver was previously linked to another transmitter, 

make sure that transmitter is not operating while linking the receiver to 

the new transmitter.

Output 

connector

Channel

Mode A

1 ~ 8CH

Mode B

1 ~ 7CH

Mode C

9 ~ 10CH

Mode D

9 ~ 10CH

11199

2 2 2 10 10

3 3 3 --

4 4 4 --

5 5 5 --

6 6 6 --

7/B 7 7 - -

8/SB 8 S.BUS - S.BUS

Red LED 

blink 1 time 2 time 3 time 4 time

R3008SB CH Mode table

WARNING

Turn on the power in transmitter → receiver order. In addition, always check the operation of all the servos before flight. 

Do not insert or remove the servo connector while the receiver power is ON.

Since the S.BUS servo switches the operation mode automatically according to the type of signal (S.BUS signal/PWM signal) from the receiver, if the connector is inserted 

or removed while the power is ON, an S.BUS connected servo will be erroneously recognized and may stop.

©FUTABA CORPORATION 2014, 01 (1)

What is S.BUS?

Unlike conventional radio control systems, the S.BUS system uses data 

communication to transmit control signals from a receiver to a servo, 

gyro, or other S.BUS compatible device. This data includes commands 

such as “move the channel 3 servo to 15 degrees, move the channel 5 

servo to 30 degrees” to multiple devices. The S.BUS devices execute 

only those commands for their own set channel. For this reason, it can 

be used by connecting multiple servos to the same signal line. S.BUS hub S.BUS hub S.BUS output

S.BUS Ch output/

Battery terminal

R3008SB

Battery S.BUS servo

Conventional servo

2ch 4ch

3ch 5ch

6ch

 [Connection by S.BUS system]

* Set the channel of S.BUS servos by using an SBC-1 channel changer, CIU-2 USB 

serial interface or the programming software resident in the T10J transmitter.

* Can also be used together with conventional servos. However, conventional servos cannot be used by the S.BUS output.

* When using servos with a remote battery pack, use S.BUS Hub with Cable (2-

way/remote battery pack use).

 Please refer to the instruction manual of S.BUS Hub with Cable (2-way/remote 

battery pack use) for the connection method.

Default CH mode