Applicable systems: Futaba S-FHSS/FHSS-2.4GHz system and TM-FH RF Module

R2008SB S-FHSS/FHSS-2.4GHz System

S.BUS Port and 8 Channels for Conventional System

Receiver

Compliance Information Statement 

(for U.S.A.)

This device, trade name Futaba Corporation of America, model 

number R2008SB, 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.

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: support@futaba-rc.com (Support)

R2008SB Specifications

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

conventional system receiver

• Dual antenna diversity

• Size: 0.98 x 1.69 x 0.55 in. (24.9 x 42.8 x 14.0 mm)

• Weight: 0.34 oz. (9.5g)

• Power requirement: 4.8V to 7.4V

• Battery F/S Voltage: 3.8V 

* Be sure that when using ESC's regulated output the current capacity of the 

ESC must meet your usage condition.

*The Battery F/S voltage is set for 4-cell NiCd/NiMH battery. Battery F/S 

function doesn't work properly when other type battery is used.

*The fail safe function can be set for each channel , however it differs according to the transmitter. When you use TM-FH RF Module , the fail safe 

function can be set for 3-channel only.

*S.BUS port: R2008SB can be used up to 8 channels, however, it differs according to the transmitter. An unused channel is a neutral signal. The F/S 

setting channel at F/S is F/S position. Another, it is Hold signal.

Thank you for purchasing a Futaba R2008SB S-FHSS/FHSS-2.4GHz compatible receiver.

The R2008SB has an S.BUS system output port and a conventional system channel outputs. It can also be used with 

conventional system servos, etc. in addition to S.BUS system compatible servos and gyros, etc.

 The antenna should not be pulled. 

 Keep the antenna away from the motor, ESC 

and other noise sources as you can.

 Be sure that the two antennas are placed at 90 

degrees to each other.

•	The R2008SB 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 fuse

 WARNING

 The antenna portion of 30mm tip must be fully 

exposed.

•	Please make sure that the exposed portion won't be slided

back in the fuse by the wind pressure or other force during

the flight session.

Usage precaution

•	Futaba S-FHSS/FHSS system does not work with current Futaba FASST system. Futaba FASST system and 

S-FHSS/FHSS system are not compatible each other.

 WARNING

 Wrap the receiver with something soft, such as 

foam rubber, to avoid vibration. Moreover, The 

receiver must not get wet.

 Keep away from conductive material to avoid the 

short circuit.

Antenna installation precaution

 Do not cut or bundle the receiver antenna wire. 

 

 Do not bend the coaxial cable . It causes damage.

(Antenna installation)

90 ̊

Link switch

Antenna

LED

R2008SB

for conventional

system

Channel 1

Channel 7

Channel 8 output

for conventional

system

/Battery terminal

output

output

S.BUS Port

(Connectors)

1M23N17452
What is S.BUS?

Different from 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.

 [Connection by S.BUS system]

S.BUS hub S.BUS hub S.BUS output

S.BUS Ch output/

Battery terminal

R2008SB

Battery S.BUS servo

Conventional

servo

1ch 3ch

2ch 5ch

4ch

* Set the channel at the S.BUS servos by using an SBC-1 channel changer or a CIU-2 USB serial interface.

* 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.

 WARNING

 Do not perform the linking procedure with

motor's main wire is connected or the engine is

operating as it may result in serious injury.

 When the linking is done, please cycle receiver

power and check if the receiver to be linked is

really under the control by the transmitter to be linked. 

 WARNING

 Turn on the power on transmitter → receiver in 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

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

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

©FUTABA CORPORATION 2011, 9 (1)

LED Indication

Green Red Status

Off Solid No signal reception

Solid Off Receiving signals

Blink Off Receiving signals but ID is unmatched

Alternate blink Unrecoverable error (Memory, etc.)

Link to the transmitter

1 Bring the transmitter and the receiver close to each 

other, within 20 inches (half meter).

2 Turn on the transmitter . 

3 Turn on the receiver .

4 Press and hold the Link switch more than two(2)

seconds. When the link is complete, the LED in the

receiver changes to solid green. When the ID cannot

be read due to the surrounding environment, try 

reading it with the transmitter and receiver antennas 

touched.

•	When you use TM-FH RF Module , the fail safe function can

be set for 3-channel only. The throttle stick is set the position

of hope (slow) and above-mentioned Link is set.

•	If there are many S-FHSS/FHSS systems turned on

in close proximity, your receiver might not link to your

transmitter. In this case, even if the receiver's LED stays solid

green,unfortunately the receiver might have established a 

link to one of other transmitters. This is very dangerous if you

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

strongly recommend you to doublecheck whether your

receiver is really under control by your transmitter by giving 

the stick input and then checking the servo response.

Please refer the table below for LED status vs 

receiver's condition.