Steering e nd p oint a djustment (epa), Aux channel function (ch3 ), Steering dual rates setup – OFNA Racing Ho Bao RTR Radio User Manual
Page 4: Definition, St.d/r sw
 
AUX Channel Function (CH3)
•This switch control the transmitter’s third channel. A servo plugged in this Channel 3 will move to full travel in one 
 direction when the switch is in the “AUX” position, then move the switch to the “OFF” position the servo will move
 in the opposite position . This channel can be use to turn on all sort of things in your vehicle. For example, lights, 
 on board camera etc..... l
Steering Dual Rates Setup
ST.D/R SW
•DEFINITION:
 Steering Dual Rate (ST. DR): Is the adjustment that allows the dual rate value 
 (maximum servo travel) to be increased (INC) or decreased(DEC) with in a range
 of 0% to 100% of the steering servo. This functions very useful in a race 
 conditions as it allows you to tailor the steering radius and sensitivity for the
 current track conditions.  
•ADJUSTMENT:
INC
DEC
ST.DR
1.Press and hold the “INC” (Increase) button until the LED on the “ST.DR” blinking green 
 into a blinking red indicating maximum turning radius or value of 100%.
2.Press and hold the “DEC” (Decrease) button until the LED on the ‘ST.DR” start blinking green
 and goes to a blinking red LED indicating minimum turning radius or value 0%. 
Steering End Point Adjustment (ST.EPA)
L R
L R
*After adjusting "D/R" to Max position then adjust 
 both "ST EPA" knob to the correct position as 
 picture shown. 
Steering
 Stopper
*The steering stopper may vary for different 
 brand models. Follow the steering stopper 
 set-up for max position. The steering servo 
 may be damaged if it is overload.
Use the "EPA" to adjust steering tie-rod to
the steering stopper. 
Steering End Point Adjustment (EPA)
Left turn
Right turn
Straight (neutral)
*L/R Steering end point adjustment 
 (ST. EPA)knob.
Max
Max