Parameter menu, A. swashplate cyclic center adjustment, Rate-mode – Spektrum SPMAR7200BX User Manual
Page 23: Headinglock-mode
 
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To find the optimal gain:
1. Start with a low gain value where the tail will feel very weak.
2. Increase the gain step by step until the tail feels more precise and holds better
on sudden pitch inputs.
3. If the gain is too high, “wagging” will appear in fast forward or backward
flight.
-100%
100%
0%
A
Menu LED:
Tail gyro gain (CH 5)
Rate-Mode
Status-LED: Purple
HeadingLock-Mode
Status LED: Blue
N M
L K
J I
H G
F E
D C
B
B C
D E
F G
H I
J K
L M
N
parameter menu
To enter the Parameter Menu:
1. When the AR7200BX is ready for flight, press and hold the setup button until
the LED flashes next to menu point (A).
2. Release the setup button.
3. Press the setup button once to move to the next menu point. The Parameter
Menu only has 8 menu points (A through H).
4.	 Press	the	setup	button	once	at	menu	point	(H)	to	exit	the	Parameter	Menu.
It is possible to skip menu points. Do not move the transmitter sticks when you 
are in a menu point you want to skip. Quickly press the setup button again to
move past the menu point you want to skip.
CAUTIoN: Never fly the helicopter when the AR7200BX is in the Setup or
Parameter Menu. Gyro control and transmitter stick controls are disabled
when the AR7200BX is in the Setup or Parameter Menu.
A. Swashplate Cyclic Center Adjustment
NoTICE: NEVER USE TRANSMITTER TRIMS WITH THE AR7200BX!
The AR7200BX will interpret the trim as a control command, NOT as servo trim.
Menu	point	A	allows	you	to	easily	adjust	your	servo	centers	at	the	flying	field	if	
the helicopter is wobbling during pirouettes or not climbing out straight on quick
pitch inputs.
Parameter menu point (A) adjusts both the aileron and elevator servo centers 
without regard to the individual servos.
To adjust the aileron and elevator servo centers:
1. Move the aileron or elevator stick in the desired direction.
2. Repeatedly move the stick or hold the stick to move several trim steps at once.
3. To delete the trimming, move the tail stick in any direction.