2.4GHZ DIGITAL
RADIO SYSTEM
TRANSMITTER FUNCTIONS
Top
Bottom
A. Servo Reversing
To reverse the Throttle (TH) or Steering (ST) channel, switch
the position of the correlating switch—“N” is for normal, “R”
is for reverse.
B. Throttle Trim
Adjusts the throttle neutral point
C. Steering Trim
Adjusts the steering center point. Normally, the steering trim is
adjusted until the vehicle tracks straight.
D. Throttle Rate
Adjusts the end point of the throttle
E. Steering Rate
Adjusts the end point of the steering
F. Indicator Lights
• Solid red lights: Indicates radio connectivity and
adequate battery power
• Flashing red lights: Indicates the battery voltage is
critically low. Replace batteries
G. Throttle Limit
Limits throttle output to 50/75/100%
Select 50% or 75% for less experienced drivers or when you
are driving the vehicle in a small area.
H. Antenna
I. Power Button
J. Throttle/Brake
K. Steering Wheel
L. Channel 3 Buttons: Top and Bottom
2 SPEKTRUM STX3 USER GUIDE
EN
This transmitter requires 4 AA batteries.
1. Remove the battery cover from the
transmitter.
2. Install the batteries as shown.
3. Install the battery cover.
INSTALLING THE TRANSMITTER BATTERIES
CAUTION: If using rechargeable batteries, charge only rechargeable batteries. Charging non-rechargeable batteries
may cause the batteries to burst, resulting in injury to persons and/or damage to property.
CAUTION: Risk of explosion if battery is replaced by an incorrect type. Dispose of used batteries according to
national regulations.
SRX300 RECEIVER
Specifi cations
Type: FHSS 2.4GHz protocol
Dimensions (LxWxH): 35.8 x 23.6 x 14.3 mm)
Antenna Length: 8.27 in
Channels: 3
Weight: 8.8g
Band: 2.4GHz
Voltage Range: 3.5–9.6V
A
B
D
F
E
G
J
H
K
C
I
L
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