Spektrum SPMAR7200BX - Manual (Page 11)

EN
11
C. Tail Servo Center position/pulse Length
Almost all tail servos work with 1520µs (micro seconds). There are a few tail
servos available that use a different center position pulse length.
Status-LED Tail servo center position pulse length
OFF User Defined (requires PC software)
Purple Solid 960µs
Red Solid 760µs
Blue Solid 1520µs*
ImpoRTANT: If a pulse length is selected (C) that does not allow a certain tail
servo frequency (D), the frequency is automatically reduced. The center position
pulse setting always has priority. A servo can operate without issue at a lower
frequency but cannot operate with an incorrect center position pulse length.
Push the setup button to save the selection and move to menu point (D).
D. Tail Servo Frequency
CAUTIoN: If you do not know the maximum frequency for your selected tail
servo, do not exceed 50Hz. Exceeding the maximum frequency for the tail
servo can lead to servo failure.
For best performance, always use a high-quality tail servo capable of at least
270Hz. Depending on the selection chosen in menu point (C), you may not be able
to select a frequency above 333Hz.
Status-LED
OFF User Defined (requires PC software)
Purple Solid 50 Hz*
Red Flashing 165Hz
Red Solid 270Hz
Blue Flashing 333Hz
Blue Solid 560Hz
Attach a servo horn to the tail servo, making sure the tail linkage rod forms a 90°
angle with the servo horn. Adjust the tail linkage rod according to your helicopter
instruction manual. For most helicopters, the tail pitch slider should be centered
on the tail shaft. The tail rotor blades will have a small amount of positive pitch to
counter the torque from the main rotor.
ImpoRTANT: Menu point (D) does not have a time limit.
Push the setup button to save the selection and move to menu point (E).
*=Factory
Setting
*=Factory
Setting