DETRUM GAVIN 8C User manual

目录
Introduction.....................................1
Disclaimer.........................................1
Change History.................................1
Indications and Symbols for Safe Use
..........................................................1
Installation Precautions....................2
Flying Precautions............................2
Product Description.......................5
Box Contents....................................5
Transmitter........................................5
Specifications..............................5
Features......................................5
Transmitter Controls ...................6
Main Screen................................9
Receiver ...........................................9
Specifications............................10
Features....................................10
Changing the Mode...................10
Connections..............................11
Basic Operation............................12
Adjust the Stick Lever Tension.......12
Change the Location of Throttle Stick
........................................................13
Binding............................................14
Range Test .....................................14
Flight Mode.....................................15
Dual Rate (D/R) setting..................16
Model Parameter (Airplane) ........17
Reverse [Rev Set]..........................17
End Point [End Point].....................18
Sub Trim [Sub Trim]........................18
Stick Curve [Stick Curve] ...............19
Throttle Curve [THR Curve] ...........20
Throttle Hold [THR Hold]................21
Mix Set [Mix Set] ............................21
Delta Mixing [Delta Mix]............22
V-tail Mixing [V-tail Mix].............23
Flaperon Mixing [Flaperon Mix] 25
Throttle to Balance Mixing
[THR▶BAL Mix] .........................27
Veer to Elevator Mixing [Veer▶ELE
Mix]............................................28
Servo Delay [Servo Delay].............29
Airplane Gyro .................................30
Model Parameter (Helicopter).....36
Reverse [Rev Set]..........................36
End Point [End Point].....................36
Sub Trim [Sub Trim]........................36
Stick Curve [Stick Curve] ...............36
Throttle Curve [THR Curve] ...........36
Pitch Curve [PIT Curve] .................38
Throttle Hold [THR Hold]................39
Swash Mixing [Swash Mix].............39
Servo Delay [Servo Delay].............41
Model Parameter (Multi-rotor).....42
Reverse [Rev Set]..........................42
End Point [End Point].....................42

Sub Trim [Sub Trim]........................42
Stick Curve [Stick Curve] ...............42
Throttle Curve [THR Curve] ...........42
Throttle Hold [THR Hold]................42
Function Set..................................43
Model Set.......................................45
Select Model [Model]......................45
Edit Model Name [Name]...............45
Select Model Type [Type]...............46
Trainer Set [Trainer Set].................47
Fail Safe [Fail Safe]........................48
Timer Set [Timer 1/2 Set] ...............50
Reset Model [Reset].......................51
Channel Monitor...........................52
System Set....................................53
Language [Language]....................53
Calibration [Calibration]..................53
Stick Mode [Stick Mode].................54
Volume [Volume] ............................55
Key Tone [Key Tone] ......................55
Back-light Brightness [Brightness] .55
Back-light Time [Bright Off] ............56
Battery Type [Bat Type]..................56
About Information [About] ..............56

- 1 -
Introduction
Disclaimer
Thank you for purchasing this DETRUM product. This is a 2.4GHz digital
proportional R/C system with high performance. In order to make full use of the
features of this product and to safely enjoy your R/C activities, please read this
manual carefully before using. Please install and use this product in strict
accordance with the manual. The company assumes no liability or loss incurred
directly or indirectly from improper use, installation, or any modification of this
product.
Products shall be subject to any changes without additional notices.
This product is suitable for users experienced in operating model aircraft and
aged 14 years or older.
Please fly at a locally recognized model aircraft flying field.
Change History
No.
Version
Date
Records
1
V1.0
2016-10-20
Thismanualwasfirstreleased.
Indications and Symbols for Safe Use
The following symbols used in this manual indicate the precautions regarding
possible danger which may occur following improper operation.
DANGER: Procedures, which if not properly followed, may lead to a
dangerous condition of death or serious injury.
WARNING: Procedures, which if not properly followed, may lead to a
possibility of death or serious injury.
CAUTION: Procedures, which if not properly followed, may lead to a
possibility of property damage, or a danger of injury.
Prohibited Mandatory

GAVIN-8C Instruction Manual
- 2 -
Installation Precautions
It is very important to properly install the R/C system on the model aircraft.
Please refer to the following instructions:
In order to protect the receiver, wrap the receiver with 10mm foam rubber,
and then fasten it with a rubber band or a Velcro strap.
The servos should be installed with rubber gaskets and brass eyelets to
isolate the vibration from the fuselage. When locking the screws, follow the
principle that the rubber gasket does not distort. If the locking is too tight, it
will reduce the vibration-proof performance.
When mounting a servo, make sure that the servo can rotate over its full
travel and check that the push-rods and servo arms do not bind or contact
each other.
When mounting a power switch, keep away from the engine's exhaust pipe
and any places with high vibration. And ensure that you can turn the switch
on/off without binding.
The two antennas of the receiver should be placed at 90 degrees to each
other. Do not place the two antennas twisted together or in parallel.
Flying Precautions
WARNING: Personal injury and property loss may be caused by improper
aircraft handling. Please operate strictly according to the following safety
instructions.
Flying Field and Conditions:
In order to protect the personal safety and their property, please do not fly at
the following places:
Near another radio control flying field
Near or above people
Near residential areas, schools, hospitals or other places where people
congregate
Near high-voltage lines, tall buildings, or communication facilities

GAVIN-8C Instruction Manual
- 3 -
Never fly on rainy day, thunder storm, when the wind is strong, and at night.
Always keep away from humidity environment.
The R/C system is composed of precision electronic components and
mechanical parts. Please keep away from humidity environment to prevent
the components damage from vapor and cause a failure which would lead to
a crash.
Always keep away from heat sources.
The R/C system is composed of precision electronic components and
mechanical parts. Please keep it away from heat sources and sunshine to
avoid distortion, or even damage caused by high temperature.
Precautions before Flight:
Always make sure that all servos in the model work properly following the
transmitter stick movements prior to flight. And make sure that all switches
work properly as well.
Always check the remaining capacity of both the transmitter and receiver
batteries before each flying session prior to flight. Low battery capacity will
cause loss of control and a crash.
Always perform a range test before each flying session.
Always check the operation of each control surface before each flying session.
When using the trainer function, please check both the instructor and student
transmitters.
For safety reasons, always set fail safe functions before each flying session.
Especially set the throttle channel fail safe function.
Precautions during Flight:
Never grasp the transmitter antenna during flight. Otherwise, the transmitter
output power will reduce drastically.
Do not point the antenna directly toward the aircraft during flight. When
pointing the antenna directly, the transmitter output is the weakest. The
strong radio wave radiate from the side of the transmitter antenna.
Never turn on and off the power switch of transmitter during flight or while the
engine or motor is running.

GAVIN-8C Instruction Manual
- 4 -
Do not touch the engine, motor, or other heating device during and
immediately after use. These devices or components may become hot during
use.
For safety, always fly the aircraft in visible range. Flying behind tall buildings
will not only lose sight of the aircraft, but also degrade the RF signal
performance.
Always return the transmitter setting screen to the initial main screen during
flight. Erroneous input during flight is very dangerous.
Precautions in Other Conditions
Never fly in the range check mode (test mode). In this mode, the transmitter
output power is greatly reduced, it may cause a crash.
When setting the transmitter during flight preparations, do not set it upright on
the ground. The transmitter may fall to the ground, the sticks may move and
the servos may rotate unexpectedly and cause injury.
Do not touch the receiver antenna directly by hands. Otherwise, the
components may be damaged by static, and this may cause a reduction in
transmission distance of the receiver.
Before turning on the transmitter, always make sure the transmitter throttle
stick and throttle trim are in the lowest position.
Always turn on the R/C system in proper sequence: turn on the transmitter
first, then turn on the receiver, and then turn on the engine or motor. Incorrect
sequence may cause loss of control and personal injury.
Always turn off the R/C system in proper sequence: turn off the engine or
motor first, then turn off the receiver, and then turn off the transmitter.
Incorrect sequence may cause loss of control and personal injury.

- 5 -
Product Description
Box Contents
GAVIN-8C Transmitter DETRUMRXC8Receiver
Instruction Manual USB Cable (optional)
Simulator Convertor (optional) 9g Servo *4pcs (optional)
NOTE: The set contents depend on the type of set.
Transmitter
Specifications
Parameters
GAVIN-8C Specifications
Channel
8-channel
Transmitting frequency
2.4GHz
Power supply
AA batteries 4*1.5V, Ni-MH batteries 4*1.2V,
2S Li-Po
Consuming current
Test mode: less than or equal to 120mA.
Operating mode: less than or equal to 230mA.
Output power
Test mode: 10mW. Operating mode: 100mW.
Output pulse
1000ms~2000ms (neutral 1500ms)
Features
Adopting powerful wireless chips and extended with power amplifier (PA) and
low noise amplifier (LNA), can maximize the system output power while
reducing the system noise factor, thereby improving the signal coverage.
The R/C system adopts 2.4GHz direct sequence spread spectrum (DSSS)
and multiple frequency-hopping spread spectrum (FHSS) technology, has
strong anti-interference capability, can support a stable remote control for
more than 1,000 meters on the ground and more than 1,600 meters in the air.
It is suitable for airplane, helicopter, and multi-copter (multi-rotor).
Fast response: The response time is only 2.6ms, even 8 channels it acts
synchronously.
High section precision: By using the 4096 section precision sticks, you can
experience a smooth and exquisite flight operation.
192*96 high-resolution dot-matrix LCD with easy-to-understand image and
menu, make it simple to use.

GAVIN-8C Instruction Manual
- 6 -
Low voltage alarm: Detecting the input voltage of the transmitter in real time,
it will alarm in advance when it is low battery voltage. This will bring greater
security for flight operation.
Fail safe protection: Set the fail safe function by transmitter in advance. When
the aircraft flies out of range, the receiver cannot receive a valid RF signal
from the transmitter and will move the servos to predefined position.
USB upgrade: Upgrade by a USB cable helps GAVIN-8C always keeps the
latest program.
When working with a sport receiver which is integrated with 6-axis gyro,
GAVIN-8C can be used to set its programmable items in real time.
Transmitter Controls
Antenna
Switch (SD SE SF)
Neck Strap Attachment
Digital Trim (throttle)
Power Switch
Enter Key (ENT)
Changing Value Key
(R/+, L/-)
LCD Display
Exilt Key (EXT)
Menu Selection Key
(UP, DOWN)
Digital Trim (elevator)
Switch (SA SB SC)
Digital Trim (aileron)
Digital Trim (rudder)
Elevator Stick
Rudder Stick
Throttle Stick
Aileron Stick
Trainer Connector

GAVIN-8C Instruction Manual
Screws to secure the rear cover
Carrying Handle
(there are six screws)
Battery cover
USB Interface
NOTE: When the Stick Mode is set to MODE 1, the positions of sticks and
digital trims are shown in the figure. The positions are different depending on
the stick mode. For details, please refer to StickMode[StickMode](Page54).
- 7 -
Antenna: The strong radio wave radiate from the side of the transmitter
antenna. Do not point the antenna directly toward the aircraft during flight.
Carrying Handle: The carrying handle is designed for easily carrying and
placing the transmitter.
Power Switch: Push the switch upward to turn on the transmitter, push
downward to turn off.
Neck Strap Attachment: For a long flight you can choose to use a neck strap
for easy handing. The neck strap attachment is on the neutral position, in
order to get the best balance for transmitter.

GAVIN-8C Instruction Manual
- 8 -
Switch
SA: 3 positions, alternate, short lever
SB: 3 positions, alternate, short lever
SC: 2 positions, momentary, short lever
SD: 3 positions, alternate, short lever
SE: 3 positions, alternate, short lever
SF: 2 positions, alternate, short lever
Users can assign the above switches to specified functions (for example,
throttle hold, acrobatic flight, etc.) according to individual habits. For details,
please refer to Function Set (Page 43).
Sticks: When the Stick Mode is set to MODE 1, the positions of sticks are
shown in the figure.
Digital Trims: This transmitter is equipped with four digital trims. Each time
you press a trim button, the trim position moves one step. If you press and
hold it, the output will scroll in that direction until the trim button is released or
the output reaches its ends. You can always monitor trim positions by
referencing the LCD screen.
CAUTION: The trim positions you have set will be stored in memory and will
remain there even the transmitter powered off.
Keys
EXT: exit key, press this key to return to the previous menu.
UP: press this key to select the menu upward.
DOWN: press this key to select the menu downward.
ENT: enter key, press this key to enter the sub-menu or to confirm the
setting.
R/+: press this key to choose the value upward.
L/-: press this key to choose the value downward.
LCD: You can get the current status from the main screen, and set the
parameters from the menu.
Simulator/Trainer Connector

GAVIN-8C Instruction Manual
- 9 -
When it is used as a simulator connector, connect the transmitter and
computer by simulator dongle and dongle cable, and then you can learn
flying skills on computer. In order to use this function, you need to purchase
a simulator dongle and the matched simulation software.
When it is used as a trainer connector, connect the instructor and student
transmitter with an optional trainer cable, and then a skilled instructor can
teach a student with flying skills.
USB interface: With a USB interface, it is easy to upgrade the transmitter
firmware to the latest program.
Main Screen
Push the power switch upward to turn on the transmitter and directly enter the
main screen.
. .
. .
0%
00:00
00:00 MODEL01
GAVIN-8C
NORM
00:00:57 86% Battery Indicator
System Timer
Model Type
Digital Trim
Model Name
Digital Trim
Timer (1, 2)
D/R
Product Model
Flight Mode
Digital Trim
Digital Trim
Current Position
(based on the standard
servo movement) 1.
2.
AIL: D0
ELE: D0
RUD: D0
In the main screen, press ENT key to enter the main menu.
GAVIN-8C 1/5
1. Model Parameter
2.Func Set
3.Model Set
4.Channel Monitor
5.System Set
Receiver
This section is the introductions of DETRUM RXC8 Receiver. If you choose other
receivers, please refer to the instructions of the other receivers.

GAVIN-8C Instruction Manual
- 10 -
Specifications
Parameters
RXC8Specifications
Type
2.4GHz,8-channel receiver
Sensitivity
-97dBm
Frequency interval
larger than or equal to 4MHz
Power supply
3.6V~16V
Weight
12g
Size
39mm*28.5mm*14.5mm
Features
Using ARM M3 processor, provides strong resolution capability.
Adopting 2.4GHz direct sequence spread spectrum (DSSS) and multiple
frequency-hopping spread spectrum (FHSS) technology, the receiver has
high sensitivity and strong anti-interference capability.
By using diversity antenna, can automatically switch the signals to ensure the
stability of the received signal.
Each transmitter has an individually assigned, unique ID code. Once the
binding is made, the ID code is stored in the receiver and no further binding is
necessary after restarting the receiver.
When the aircraft flies out of range, the receiver cannot receive a valid RF
signal from the transmitter and will move the servos to predefined position.
Support PPM and PWM signals.
Changing the Mode
According to the output signal types, RXC8 has a PPM mode and a PWM mode.
You can check the current mode from the mode LED on the receiver. After
powering on the receiver, the mode LED will stay red or green and will be off after
5 seconds. When the mode LED is off, you can light this LED by clicking the
Bind/Mode button.
Green: This indicates that the receiver works on PWM mode.
Red: This indicates that the receiver works on PPM mode.
You can change the receiver’s mode as needed. Changing the receiver from

GAVIN-8C Instruction Manual
- 11 -
PWM mode to PPM mode is taken as an example.
Press and hold Bind/Mode button on the receiver, and then power on the
receiver. The mode LED will stay green for 2 seconds and then change into red
on, indicating that the receiver switches to PPM mode, and the mode LED will be
off 5 seconds later.
Connections
The channels of DETRUM RXC8 receiver are labeled with names, as shown in
the following figure. For each channel, signal wire is close to the top of the
receiver, middle is the positive and bottom is GND.
The RXC8 receiver has a PPM mode and a PWM mode. The connection of the
receiver in two modes is described as follows:
On PWM mode, you can connect the receiver’s channels directly to the servo,
or connect them to the servos via the flight control.
On PPM mode, connect the PPM port of the flight control (supports PPM
signal) to the PPM/AILE port of the receiver, and then connect the output port
of the flight control to the servos.
Installation Precautions for the receiver:
When connecting the receiver, please note the line sequence and securely
insert all of the connectors as far as they will go.
The two antennas of the receiver should be placed at 90 degrees to each
other. Do not place the two antennas twisted together or in parallel.
Bind/Mode Key
AUX3
AUX2
AUX1
GEAR
RUDD
THRO
ELEV
PPM/AILE PPM Signal
Aileron channel
Elevator channel
Throttle channel
Rudder channel
Gear channel
Auxiliary 1 channel
Auxiliary 2 channel
Auxiliary 3 channel
Signal
+
GND

- 12 -
Basic Operation
Adjust the Stick Lever Tension
This allows adjustment of the stick lever tension to meet different operating
habits.
Tools: Phillips screwdriver, ESD wrist strap or ESD gloves.
Conditions: Before operating, please wear an ESD wrist strap or ESD gloves.
Steps:
1. Open the battery cover, and remove the batteries.
2. Remove the six screws on the rear cover with a Phillips screwdriver.
3. Open the rear cover.
CAUTION: Please gently ease off the transmitter's rear cover, to avoid
breaking the wirings.
Screws for spring adjustment Screws for spring adjustment
Screws for spring adjustment
Screws for spring adjustment
4. Use a Phillips screwdriver to adjust the spring strength as you prefer by
turning the screw of the stick you want to adjust. Turning the screw clockwise
increases the tension, counter clockwise to loosen.
CAUTION: To avoid abnormal work, do not loosen the screw too much.
5. Install the rear cover, and then tighten the six screws on the rear cover.
6. Install the batteries and the battery cover.

GAVIN-8C Instruction Manual
- 13 -
Change the Location of Throttle Stick
If you want to change the throttle stick from right-hand to left-hand, or change
from left-hand to right-hand, it is need to change the location of the throttle stick,
and then change the stick mode. The following is the method for changing the
location of the throttle stick.
Tools: Phillips screwdriver, ESD wrist strap or ESD gloves.
Conditions: Before operating, please wear an ESD wrist strap or ESD gloves.
Steps:
1. Open the battery cover, and remove the batteries.
2. Remove the six screws on the rear cover with a Phillips screwdriver.
3. Open the rear cover and remove the wirings between the PCB and rear
cover.
CAUTION: Please gently ease off the transmitter's rear cover, to avoid
breaking the wirings.
4. Remove the eight screws fixed the sticks on the front cover with a Phillips
screwdriver.
5. Remove the wirings between the sticks and PCB.
6. Take out the two sticks and exchange the location, and tighten the eight
screws on front cover.
7. Reconnect the wirings between the sticks and PCB.
8. Connect the wirings between the PCB and rear cover, close the rear cover,
and then tighten the six screws on the rear cover.

GAVIN-8C Instruction Manual
- 14 -
9. Install the batteries and the battery cover.
NOTE: After changing the location of throttle stick and elevator stick, please
change the stick mode. For details, please refer to Stick Mode [Stick Mode]
(Page 54).
Binding
In order for the transmitter and receiver to communicate, it is essential to pair or
bind them together. When you use the R/C system first time or change a
transmitter/receiver, this procedure is necessary. Each transmitter has an
individually assigned, unique ID code. Once the binding is made, the ID code is
stored in the receiver and no further binding is necessary after restarting the
receiver.
Preconditions:
Move the throttle stick to the lowest position and make sure the transmitter is
powered off.
Place the transmitter and the receiver close to each other within a distance of
about one meter.
Steps:
1. Power on RXC8 receiver. The status LED will start fast red flashing, indicating
the transmitter is off.
2. Long press (more than 2 sec) Bind/Mode button, the status LED will start
slow red flashing, indicating the receiver is in bind mode and ready to be
bound to the transmitter.
3. While pulling and holding the SC switch of transmitter, turn on the transmitter.
The system begins to bind.
4. Once the status LED on the receiver stays green, indicating the receiver is
bound to the transmitter. Release the SC switch.
5. Turn off the transmitter and receiver.
Range Test
It is extremely important to perform a range check before each flying session.
This enables you to ensure that each function is working as it should be.

GAVIN-8C Instruction Manual
- 15 -
GAVIN-8C transmitter allows you to reduce its power output and access the test
mode. Then you can detect interference from environment and perform a range
check.
Steps:
1. Lower throttle to the lowest position and make sure the transmitter is powered
off.
2. While pressing ENT key, turn on the transmitter, the transmitter will access
the test mode.
The LCD will display as the following figure, and the transmitter's LED
indicator will flash on test mode.
You can exit the test mode by pressing EXT key.
Test mode
EXT
3. With the test mode on, walk away from the model while simultaneously
operating the controls. Have an assistant stand by the model to confirm that
all controls are completely and correctly operational. You should be able to
walk approximately 30~50 paces from the model without losing control.
WARNING: Never fly in range check mode (test mode).
Flight Mode
The flight mode function allows switching between various aircraft flight
characteristics (flight mode) using a switch. The flight modes which can be
selected are various with model type.
Airplane / multi-copter flight mode: NORM (normal) and HLD (hold).
Helicopter flight mode: NORM (normal), HLD (hold), and ACR (acrobatic).
It is possible to activate these flight modes by the throttle hold switch and
acrobatic flight switch:

GAVIN-8C Instruction Manual
- 16 -
You can change between normal and throttle hold flight mode by toggling
throttle hold switch. The switch can be customized, please refer to Function
Set (Page 43).
You can change between normal and acrobatic flight mode by toggling
acrobatic flight switch. The switch can be customized, please refer to
Function Set (Page 43).
Dual Rate (D/R) setting
This function switches aileron, elevator, and rudder control surfaces between
different control surface angles and curves, using the dual rate (D/R) switches.
Setting Method:
1. Choose the switches for AILD/R, ELE D/R, and RUD D/R functions.
The default values for AIL D/R, ELE D/R, and RUD D/R functions are SF.
Users can choose from any of the switches on the transmitter. The steps for
setting the switches are described in Function Set (Page 43).
You can select the same switch for aileron, elevator, and rudder control
surfaces, and can also select different switches for each control surface.
2. Change between D0, D1 and D2 mode by toggling the switch.
Take the following diagram as an example, toggle the switch to make AIL,
ELE, and RUD to D2 status. Then AIL Curve DR2, ELE Curve DR2, and
RUD Curve DR2 defined in Stick Curve [Stick Curve] (Page 19)will come into
effect.
. .
. .
0%
00:00
00:00 MODEL01
GAVIN-8C
NORM
00:00:57 86%
1.
2.
AIL: D2
ELE: D2
RUD: D2

- 17 -
Model Parameter (Airplane)
Before setting the model parameters, please select the Model and Type in the
Model Set menu first. If the model is airplane, set Type to AIRPLANE.
After entering the main menu, press UP or DOWN key to select Model
Parameter, and then press ENT key to enter the Airplane Parameter interface.
Airplane Parameter 1/9
1. Rev Set
2.End Point
3.Sub Trim
4.Stick Curve
5.THR Curve
Reverse [Rev Set]
This function is used to reverse the servo operating direction for each channel.
When set up a new model, you need to move the stick to check the servo
direction, to determine whether the channel direction needs to be reversed.
Setting Method:
1. In the Airplane Parameter menu, press UP or DOWN key to select Rev Set,
and then press ENT key to enter the setting interface.
Rev Set 1/8
1. CH1：
2.CH2：
3.CH3：
4.CH4：
5.CH5：
Norm
Norm
Norm
Norm
TxChs
Norm
........
AIL:0
ELE:0
THR:-100
RUD:0
GEAR:0
AUX1:0
AUX2:0
AUX3:0
2. Press UP or DOWN key to select the channel, and then press R/+ or L/- key
to set the value of the channel.
Values:
Norm: It means the direction of selected channel is the normal direction.

GAVIN-8C Instruction Manual
- 18 -
Rev: It means the direction of selected channel is the reverse direction.
The default is Norm.
WARNING:
Please set the Rev Set function before setting the Fail Safe function.
Otherwise it will affect the direction of the fail safe (opposite to the original
direction).
Generally, do not set the value of CH3 (throttle channel) to Rev.
End Point [End Point]
The adjustment is carried out with reference to the neutral position. This function
allows independent adjustment of the servo left/right (or up/down) movement, for
each channel.
When multiple channel mixing is used, the resultant servo movement angle may
become too large, and an unreasonable force be applied to the linkages. It is
possible to limit the maximum movement of the servos by setting the end point.
Setting Method:
1. In the Airplane Parameter menu, press UP or DOWN key to select End
Point, and then press ENT key to enter the setting interface.
End Point 1/16
1. CH1 LOW：
2.CH1HIG：
3.CH2LOW：
4.CH2HIG：
5.CH3LOW：
100
100
100
100
TxChs
100
........
AIL:0
ELE:0
THR:-100
RUD:0
GEAR:0
AUX1:0
AUX2:0
AUX3:0
2. Press UP or DOWN key to select LOW/HIG of one channel, and then press
R/+ or L/- key to set the value of LOW/HIG travel.
LOW/HIG: It is used to adjust the left/right (or up/down) servo throws of each
channel. Values: 0~120. The default is 100.
Sub Trim [Sub Trim]
This function is used to set the servo neutral position.