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Link Procedure

Each transmitter has an individually 
assigned, unique ID code. In order to start 
operation, the receiver must be linked 
with the ID code of the transmitter with 
which it is being paired. Once the link is 
made, the ID code is stored in the receiver 
and no further linking is necessary unless 
the receiver is to be used with another 
transmitter. 

1

  P l a c e  t h e  t r a n s m i t t e r  a n d  t h e 

receiver close to each other within 
half (0.5) meter.

2

 Place the transmitter into the linking 

mode, and turn on the receiver.

3

 During countdown, push the receiver  

tact switch for approximately 2 
seconds. The LED will begin to blink 
red. After the receiver LED switches 
from blinking red to green

red 

steady light,  If the transmitter and 
receiver are linked normally, set the 
power switch to the OFF position 
a n d  t h e n  t u r n  o n  t h e  P W R  O N 
position. If the receiver LED lights 
gr e e n ,  l i n k i n g  wa s  s u c c e e d e d . 
Actually check servo operation.

* Please refer to the table below for 

LED status and receiver condition.

 

* 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 systems 

turned on in close area, your receiver 
might have difficult in establishing a 
link to your transmitter.  This is a rare 
occurrence. Your receiver may link to 
the undesirable transmitter.  This is 
very dangerous if you do not notice 
this situation. In order to avoid the 
problem,we strongly recommend 
yo u  d o u bl e  c h e ck  w h e t h e r  yo u r 
receiver is really under control by your 
transmitter. 

WARNING

After 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.

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

Link switch

LED

S.BUS2 / (Battery)

CH output 
(1 to 4) / (Battery)

Operating Precautions:

Once the 

R304SB-E

 detects the 

T-FHSS

 

normal mode

 or 

T-FHSS high 

speed mode

, the detected mode is 

locked as long as the power is ON. 
When need to change the mode, 
please cycle power.

Note:

 

The R304SB-E is compatible with the T-FHSS system 

transmitters.
The receiver type setting of the transmitter is set T-FHSS.

*Futaba T-FHSS system does not work with current Futaba S-FHSS/FHSS/FASST-

est/FASST system. 

Usage condition on "High Speed mode"

CAUTION

When using the high-speed mode, use a Futaba digital servo (including 
brushless servo). Analog servos cannot be used.

• The use of analog servos may cause servo trouble.

1M23N28504

T-FHSS-2.4GHz System
S.BUS2, 4-Channel 
Built-in Antenna Receiver 
for EP Car Models 

Thank you for purchasing the 

R304SB-E

 

receiver. The 

R304SB-E

 is designed for use 

with the Futaba 

T-FHSS

 system transmitter. 

The 

R304SB-E

 receiver has adopted the newly 

developed bidirectional communication 
system "

T-FHSS

".

 •Telemetry system

With the 

telemetry system

, the running 

status can be displayed at the transmitter. 
The telemetry data can be checked at the 
transmitter by connecting the 

telemetry sensor

 

sold separately to the 

S.BUS2

 connector of the 

R304SB-E

 receiver.

 •Normal mode/High Speed mode

The "Normal mode" accepts any type of servos 
or the peripheral. The "High Speed mode" 
only accepts the digital servos, including BLS 
series, and most peripheral equipments such 
as the brushless ESCs. Please pay special 
attention to the information contained within 
this manual and transmitter's manual in order 
to have a pleasant running experience. 

•Built-in antenna

The 

R304SB-E

 receiver is designed to be 

used only for EP Car models.

R304SB-E

WARNING

NEVER

 use dry batteries for 

the power supply of the 

R304SB-E

 

as this may cause difficulties with 
the receiver's operation.

NEVER

 use the 

R304SB-E

 in GP 

(Engine) cars.

W r a p   t h e   r e c e i v e r   w i t h 
something soft,such as foam 

rubber,to avoid vibration. Do not 
splash water over the receiver.

Since the receiver generates a 
certain amount of heat, install 

the place with good ventilation.

No signal recep-
tion

LED: Red

Receiving signals

LED: Green

Unrecover-
able failure 
(EEPROM,etc.)

LED: Red 
and Green 
turn on alter-
nately

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