PowerBox Systems Royal SRS Instruction Manual page 23

4. SERVO-MATCH FUNCTION
The Servo-Match function provides the facility for adjusting the centre position and end-points
of the servos connected to the backer. If you have a model aircraft with more than one servo per
control surface, this makes it possible to set up multiple servos to move to identical positions at
identical times. Since this ensures that the servos do not work against each other, their effective
life is increased, and more power is available to move the control surfaces; matched servos also
draw lower current.
It is also possible to reverse the direction of rotation of individual servos. This function is useful if
you wish to employ fewer channels at the transmitter. For example, the right and left elevators, or
the right and left landing flaps, can be controlled using only one radio channel. In models such as
jets and warbirds, which by their nature have a large number of working systems, this feature can
be very important, but it can also make transmitter programming much easier with other types of
model.
Select SERVO-MATCHING in the Main menu, and the following screen display appears:
The screen displays a graphic representation of the block of output sockets, the identifying letter
for each output, and the function assigned to that output. Initialised outputs are marked by an I;
channels which have already been matched by an M.
Select the channel to be matched using buttons I and II, then confirm your choice with the SET
button. The following display now appears:
To ensure accurate servo matching, the output to be adjusted must first be initialised. Leave the
associated transmitter stick at centre. Move the cursor to INIT OUTPUT and press the SET button.
Now move the transmitter stick to both end-points.
The graphic display shows the movement of the upper arrow, which indicates the input signal. The
bar inside the box shows the movement of the output. The three lower arrows indicate the centre
and end-point positions which are 'learned' in this process.
Note: if the channel has not yet been initialised, it is not possible to select the START SERVO-
MATCHING and REVERSE SERVO points.
www.powerbox-systems.com 23