Futaba 8SGAP - Manual (Page 20)

•USING ATV (ADJUSTABLE TRAVEL VOLUME)
GENERAL - ATV (Adjustable Travel Volume)
allows independent adjustment of servo maximum
throw in each direction (without affecting the
neutral position). This is also sometimes referred
to as "separate endpoint adjustment". ATV is very
convenient when for example: a model requires
more DOWN elevator deflection than UP for equal
inside and outside loops (with equal control stick
deflection). Other aircraft may require slightly
different RIGHT or LEFT
aileron or rudder
deflection to give equal response in each direction
(due to engine torque, precision of the model,
etc.). Two different ATV functions are possible
with this system. Memory (Pushbutton) ATV and
2ND ATV.
MEMORY (PUSHBUTTON) ATV
This type of ATV is available on all eight channels.
Servo travel is adjusted as outlined in the example
below.
NOTE: Memory ATV settings are retained in the
transmitter memory circuit even when the power
switch is turned OFF. They are lost however, if
the transmitter Nicd battery nears full discharge or
is removed for servicing.
ATV SETTING
Switch switches (S), [49] and (R) [48]
Fig. 30
MEMORY (PUSHBUTTON) ATV - (Aileron CH1
used as example)
First, set Function Select Switch [49] to ATV
position.
Set Channel Select Switch [48] to 1 (Ail.).
Set the transmitter and receiver power switches
ON and check for proper servo operation.
Move the Aileron stick to full RIGHT aileron,
hold it in that position, and set servo movement
to the desired Right aileron deflection angle by
pressing Button [46] or 47.
Repeat Step 4 for LEFT aileron.
For other channels, select the channel with
switch 48 and adjust ATV as desired.
When all adjustments are completed, set the
Function Select and Channel Select switches
([48]and [49]) to OFF.
To clear the ATV settings on all channels, set
the Function Select switch [49] to RESET and
Channel Select switch 48 to POSITION 2 (Pos.
2 = ATV when 49 is on RESET) and press
Buttons 46 and 47 simultaneously. ATV is
cleared on ALL CHANNELS and servos will
move to 100% of their maximum throw.
If only one channel is to be cleared or changed,
simply repeat Steps I through 5 with Chan-
nel Select Switch [48] set to the appropriate
channel.
ATV/FS BUTTON
•These two pushbutton switches are used for servo deflection angle setting of ATV, FS or HOLD func-
tion, servo test start & stop; reset; battery FS memory set, etc.
Fig. 31
This pushbutton switch is used when:
Making the ATV servo deflection angle larger.
Turning the FS function on.
Starting the servo test.
This pushbutton switch is used when:
Making the ATV servo deflection angle smaller.
Turning the HOLD function on.
Stopping the servo test.
When button 46 and 47 are pressed at the same
time, reset or battery FS memory setting is pos-
sible. At this time, lamp A of memory lamps 22
goes out momentarily so that setting can be moni-
tored.