JR XP9303 User manual

INSTRUCTION MANUAL FOR AIRPLANE
XP9303
9-CHANNEL COMPUTER RADIO SYSTEM

Table of Contents
General Section
G2
Section 1: Using this manual ....................G-8
Section 2: Features .....................................G-8
R770 Receiver ....................................................G-8
R770 (Basic Air and
Sailplane Systems) .........................................G-8
R649 Receiver ....................................................G-8
R649 (Advanced Air, Basic
& Advanced Helicopter Systems) ..............G-8
Section 3: Component Specifications ....G-9
Servo Specifications ..........................................G-9
Transmitter Specifications ...............................G-9
Component Specifications ..............................G-9
Airborne Battery Pack Specifications .....G-10
Receiver Specifications .......................... G-10
Airborne Battery Pack ........................... G-10
Charger Specifications ........................... G-10
Battery Charging ..................................... G-11
Transmitter/Receiver ......................................G-11
Transmitter Only .........................................G-11
Charger .........................................................G-11
XP9303 Transmitter
Features (Front) ................................... G-12
XP9303 Transmitter
Features (Rear) .................................... G-13
Battery Cover ..............................................G-13
XP9303 Transmitter Features
(Internal) ................................................ G-14
Control Stick Tension Adjustment .............. G-14
Advanced Digital Trims ..................................G-15
Control Stick Length ......................................G-15
Direct Servo Control (DSC) ........................G-16
Why you should use the
DSC function: ...............................................G-16
Neckstrap Attachment ...................................G-17
Base Loaded Antenna .....................................G-17
Frequency Notes/Aircraft
Only Frequencies ......................................G-17
Aircraft-Only Frequencies ........................G-17
Installation Requirements ..............................G-18
Flash Memory ..................................................G-18
Connections: ....................................................G-18
Battery Alarm and Display ............................G-18

Table of Contents
Aircraft Section
G3
Introduction ........................................................A-1
Acro Programming-
Please Read ...................................................A-1
Acro - Getting Started –
System Basics Menu ....................................A-1
Access the System Menu ..................................A-2
Select a Model Memory ...................................A-2
Reset the Model .................................................A-3
To Activate the Acro Mode ..............................A-4
Enter a Name for the Model ...........................A-4
Select a Modulation Type ..................................A-5
Acro - System Menu -
Advanced Functions ...............................A-6
Flight Modes ........................................................A-7
To Activate Flight Modes ..............................A-8
Trim:COM (Flight Modes) ................................A-9
D/R:SW (Flight Modes) ....................................A-9
Switch Assignments .........................................A-10
Flap Trim ON/OFF ...........................................A-10
Activate/Inhibit Switches ................................A-11
Wing Type ..........................................................A-12
Wing Parameter – (Wing Type) ....................A-13
V-tail (Wing Type) .............................................A-14
Dual Channels (Wing Type) ...........................A-14
Twin E. (Wing Type) .........................................A-15
Trim Step ............................................................A-16
Acro – Function List ........................................A-17
REV.SW – Servo Reversing ............................A-17
Sub Trim ..............................................................A-18
TRVL ADJ. – Travel Adjust ...............................A-19
D/R & EXP – Dual Rate
and Exponential .........................................A-20
THRO CURV – Throttle Curve ....................A-21
FLAP SYS. – Flap System .................................A-23
Auto Land (Flap System) ................................A-24
ELEV – Elevator Compensation
(Flap System) ..............................................A-25
FLAP – (Flap System) ......................................A-26
FM0-FM2 (Flap System) ..................................A-27
Delay (Flap System) .........................................A-28
ELEFLP M – Elevator-to-Flap
Mising ...........................................................A-29
AILRUD M – Aileron-to-Rudder
Mixing ..........................................................A-30
AIL DIFF. – Aileron Differential .....................A-31
SRV. SPEED – Servo Speed .............................A-33
Snap Roll ............................................................A-34
GYRO SYS. – Gyro System ............................A-35
Gyro Connections (Gyro System) ...............A-35
Fixed Gyro Gain (Gyro System) ...................A-36
Stick Override Gyro Gain
(Gyro System) ............................................A-37
Prog Mix – Programmable Mixers ................A-38
Standard Programmable Mixer –
Example: Down Elevator at Idle .............A-39
MULTI-POINT MIXER – Example: Eliminate
Pitch-Coupling ............................................A-41
Fail Safe ...............................................................A-43
TRAINER – Trainer System ...........................A-44
XP9303 Used as Master (Instructor)
– (Trainer System) .....................................A-44
XP9303 Used as Slave (Student) –
(Trainer System) ........................................A-45
TIMER – Timer System ...................................A-46
Monitor ..............................................................A-47
Utility Functions ...............................................A-48
COPY – Copy the Currently Selected Model
to Another Model Memory .....................A-48
TRANSFER – Transfer the Model to Another
Transmitter or to DataSafe .....................A-50
Receive a Model into the XP9303 –
(Transfer function) .....................................A-50
Sub Trim usage and
Mechanical Advantage ...............................A-52
Sub Trim ..........................................................A-52
Mechanical Advantage .................................A-52
Dual Rates and Exponential Curves ............A-53

Table of Contents
Information Section
G4
Servo Precautions ................................................I-1
General notes .......................................................I-1
Federal Aviation Administration ........................I-2
1. Purpose ..........................................................I-2
2. Background ....................................................I-2
3. Operating Standards ...................................I-2
Daily Flight Checks ..........................................I-2
Frequency Chart ..................................................I-3
Warranty Information .........................................I-4
Warranty Coverage .........................................I-4
Repair Service Directions ..............................I-4
Warranty Repairs .............................................I-4
Normal Non-Warranty Repairs ...................I-4
Setup Sheet (Aircraft) .........................................I-5
Setup Sheet (Sailplane) ........................................I-6
Setup Sheet (Helicopter) ....................................I-7

Section 1: Using this manual
R649 Receiver
R770 Receiver
Section 2: Features
G5
This Manual is divided into three specific sections:
Airplane, Sailplane and Helicopter. When writing this
manual we employed three distinctly different individuals
to write the sections that most pertained to their expertise.
The Aircraft section was written by a top notch aerobatic
pilot, the Sailplane section by a very experienced sailplane
competitor and the Helicopter Section by a member of
the 2003 USA F3C team. Each section may read and feel
slightly different because of the different personal styles
that each of these authors has used.
In this manual you will find the specifications for the radio
and its various components and accessories. In addition,
guidelines for the installation have been included.
Instructions for setting all the functions and programs are
presented in the three sections of the manual: Airplane,
Helicopter and Sailplane. These features are discussed
in the same order that they would normally be needed to
set up a typical aircraft, helicopter and 6 servo winged
sailplane respectively. An explanation of the use and
purpose of each feature is provided, followed by a labeled
illustration of its respective LCD display.
A blank data sheet has been included at the end of each
section. Once all data has been input for a particular
model, it is highly recommended that you record it on a
copy of the sheet provided.
The computer-designed, ergonomically-styled transmitter
case ensures a comfortable fit in your hands. You will also
be introduced to our exclusive “Rolling Selector” on the
face of the transmitter for fast and effortless movement
through any programming sequence. The ultra-precision
control sticks offer adjustable spring tensions and
length. The throttle stick offers a ratchet in Airplane/
Sailplane configuration. 30-model memory storage
allows programming of all parameters of thirty separate
airplanes, helicopters or sailplanes; you can program
more than one setup for a single aircraft, allowing you to
instantly change the flight characteristics.
R770 (Basic Air and Sailplane Systems)
The R770 is a high-performance PCM single-conversion
receiver with 10KHz super narrow band ABC&W circuitry.
A narrow band ceramic filter for high-signal selectivity
assists in rejecting cross modulations from other common
radio frequencies, such as RC transmitters or local paging
systems.
This receiver features Direct Servo Control (DSC) for
control of servos without radio frequency output.
The receiver has low current consumption.
The R770’s Slimline design allows it to fit into most
model applications.
R649 (Advanced Air, Basic & Advanced
Helicopter Systems)
The R649 is a high-performance PCM single-conversion
receiver with 10KHz super narrow band ABC&W circuitry.
A narrow band ceramic filter for high-signal selectivity
assists in rejecting cross modulations from other common
radio frequencies, such as RC transmitters or local paging
systems.
This receiver features Direct Servo Control (DSC) for
control of servos without radio frequency output.
The receiver has low current consumption.
The R649’s credit card size design allows it to fit into most
model applications.

Servo Specifications
Transmitter Specifications
Component Specifications
Section 3: Component Specifications
G6
Type DS811 DS8311 DS368
Torque 54 Oz/In 125 Oz/In 53 Oz/In
Speed .18 .18 .21
Weight 1.44 Oz 1.87 Oz 0.80 Oz
Size (in) (L x W x H) 1.49x0.75x1.52 1.54x0.75x1.36 1.12x0.50x1.17
Ballbearing Yes Yes No
Motor Cored Coreless Cored
Type Airplane Helicopter Sailplane
Model Number NET-N339FS NTE-N339HS NET-N339GS
Encoder 9-channel computer system
RF Module Plug-in Module Plug-in Module Plug-in Module
Modulation PPM/SPCM PPM/SPCM PPM/SPCM
Output Power Approximately 750mw
Current Drain 200ma 200ma 200ma
Power Source 1.2Vx8 Ni-Cd (9.6V) 600Mah
Output Pulse 1000-2000 (1500 neutral)
Type Airplane Helicopter Sailplane
System Name X-9303A(basic/ X-9303H(basic)/ X-9303S
(advanced) (advanced)
Transmitter Body NET-N339FS NTE-N339HS NET-N339GS
Receiver R770(basic)/R649(advanced R649 PCM R770 PCM
Charger NEC-222 NEC-222 NEC-222
Airborne Battery 1100mah 1100mah 600mah
Servos None(basic)/ 4-DS811(basic) 3-DS368
4-DS811(advanced) 4-DS8311(adv)
Accessories Deluxe Switch Deluxe Switch Deluxe Switch
12” Ail Extension 12” Ail Extension 12” Ail Extension
Charge Jack Charge Jack Charge Jack
Servo Accessories Servo Accessories Servo Accessories
Hex Wrench Hex Wrench Hex Wrench
Instruction Manual Instruction Manual Instruction Manual

Receiver Specifications
Charger Specifications
G7
Type 7 Channel SPCM 9 Channel SPCM
Model Number R770 R649
Type 7-ch/SPCM-ABC&W/Micro 9-ch/SPCM-ABC&W
Frequency 72/75/50mhz 72/75/50mhz
Sensitivity(Microseconds) 5 uS Minimum 5 uS Minimum
Selectivity 8KHz/5 dB 8KHz/5 dB
Weight (oz) .75 oz 1.5oz
Receiver Antenna 39” for all aircraft frequencies 39” for all aircraft frequencies
Type Airplane Helicopter Sailplane
Model Number NEC-222 NEC-222 NEC-222
Input Voltage AC 100-120V AC 100-120V AC 100-120V
Output Current 65mAh Tx/150mAh Rx
Charging Time 15 Hours 15 Hours 15 Hours
Airborne Battery Pack
Airborne Battery Pack Specifications
Type Airplane Helicopter Sailplane
Model Number B1100 B1100 Extra 600
Voltage 4.8V 4.8V 4.8V
Size (in) (L x W x H) 2.24 x 0.63 x 1.70 2.24 x 0.63 x 1.70 2.64 x 1.18 x .70
Weight (oz) 4.9 4.9 2.7

Transmitter/Receiver
Battery Charging
G8
Note: It is imperative that you fully charge both the
transmitter and the receiver battery packs prior to
each trip to the field. To do so, leave the charger
and batteries hooked up overnight (16 hours). The
first charge should be approximately 20–24 hours
in order to fully charge both battery packs to peak
capacity.
The charger supplied with this system is designed
to recharge your batteries at a rate of 65mAh for the
transmitter and 150mAh for the receiver battery pack.
Transmitter Only
The center pin on all JR® Remote Control Systems is
negative. Therefore, the center pin on all JR chargers is
negative, not positive. This is different from many other
manufacturers’ chargers and radio systems. Beware of
improper connections based on “color-coded” wire leads,
as they do not apply in this instance. You must make
sure that the center pin of your JR transmitter is always
connected to the negative voltage for correct polarity
hookup.
Important: Please note that the charging polarity of
the transmitter and receiver are different.
Charger
The pilot lamps should always be on during the charging
operation. If not, check to make sure that both the
transmitter and receiver are switched off.
Do not use the charger for equipment other than JR. The
charging plug polarity may not be the same. Equipment
damage can result.
Do not use other manufacturers’ after-market accessories
that plug into the transmitter’s charging jack if you are
unsure of compatibility issues with your radio. Seek
expert advice to avoid possible damage.
During the charging operation, the charger’s temperature
is slightly elevated. This is normal.
CENTER
PIN IS
NEGATIVE
OUTSIDE IS POSITIVE
CHARGER PIGTAIL FOR RECEIVER
CHARGER PIGTAIL FOR TRANSMITTER
BLACK TO POSITIVE
RED TO NEGATIVE
RIGHT SIDE OF TRANSMITTER
RED–POSITIVE / BROWN–NEGATIVE / ORANGE–SIGNAL

XP9303 Transmitter Features (Front)
G9
Trainer Button
Gear Switch
Flap Switch
Elevator
Dual Rate
Flap Trim
Lever
AUX4/
Rudder Dual
Rate
Aux Trim
Aileron
Dual Rate
AUX2
Mix Switch
Lever
Elevator/
Aileron Stick
Throttle/
Rudder Stick
Rudder Trim
Throttle Trim
List Button
Enter Button
Clear Button
Power Switch
Aileron Trim
Elevator Trim
Rolling Selector
LCD Display

XP9303 Transmitter Features (Rear)
G10
Battery Cover
CAUTION: THE BATTERY CONNECTION IS KEYED SO THAT IT CAN ONLY
BE PLUGGED IN ONE DIRECTION. DO NOT FORCE

XP9303 Transmitter Features (Internal)
Control Stick Tension Adjustment
G11
Remove the six transmitter back screws as shown on the
previous page. Remove the transmitter back, being careful
not to cause damage to any components.
Adjust each screw for desired tension (counter-clockwise
to loosen stick feel; clockwise to tighten stick feel). When
adjusting the throttle ratchet tension, make sure that
the adjusting screw does not touch the PC board after
adjustment is complete.
ELEVATOR TENSION SCREW
AILERON TENSION SCREW
THROTTLE TENSION SCREW
RUDDER TENSION SCREW

Control Stick Length
G12
Advanced Digital Trims
The XP9303’s digital trims feature the Direct Access
display function. While at the Normal display screen, if a
trim lever is moved, the screen will automatically change
to display the graphic position for the trim being adjusted.
The XP9303’s Aileron, Elevator, Throttle and Rudder trim
levers feature an audible center trim beep. This is helpful
in determining the trim levers center position during
flight.
By using the Trim Step Function located in the System
Mode, the movement of the ADT trims can be fine tuned
as needed to match your specific application
Please also note that unlike conventional mechanical trim
levers, when the XP9303 transmitter is in the off position,
no changes can be made to the trim values during
transportation.
To adjust the stick length, use the 2mm Allen wrench
(supplied with your XP9303 transmitter) to unlock the
set screw. Turn the wrench counterclockwise to loosen
the screw. Then, turn the stick clockwise to shorten or
counterclockwise to lengthen. After the control stick
length has been adjusted to suit your flying style, tighten
the 2mm set screw. If you desire longer sticks, JR®
offers a stick (JRPA047) that is approximately one inch
longer than standard. This stick, crafted from bar stock
aluminum, is available at your local JR dealer.
LOOSEN
TIGHTEN
SET SCREW

Direct Servo Control (DSC)
G13
For proper DSC hook-up and operation:
1. Leave the transmitter power switch in the Off position.
The transmitter will not transmit any radio frequency
(RF) in this position.
2. Plug the DSC cord (purchased separately, JRPA132)
into the DSC port in the rear of the transmitter.
3. The encoder section of the transmitter will now be
operational and the LCD display will be lit.
4. Plug the other end of the DSC Cord into the
receiver charge receptacle. (You must use a 3-wire
switch harness, such as the Deluxe Switch Harness
– JRPA001, or a JR Chargeswitch – JRPA004, for the
DSC function to work.) Turn the switch harness to the
On position.
Note: When you install the charging jack, be sure to
hook the charging jack receptacle securely into the
switch harness charge cord.
Why you should use the DSC function:
1. The DSC enables you to check the control surfaces
of your aircraft without drawing the fully operational
200mAh from your transmitter battery pack. Instead,
you will only draw approximately 70mAh when using
the DSC function.
2. The DSC function allows you to make final adjustments
to your airplane without transmitting any radio signals.
Therefore, if another pilot is flying on your frequency,
you can still adjust your aircraft and not interfere with
the other pilot’s aircraft. This is also a tremendous tool
to use in the original setup of your aircraft while still
in the workshop. Because of the lower current draw on
your transmitter, your working time at the bench will be
extended between charges.
Note: This function is for bench-checking your
aircraft only.
A�
B�
C�
A—Charge Cord/DSC Receptacle
B—Switch Harness Lead
C—Charger/DSC Cord
JRPA004 Charge Switch

Neckstrap Attachment
Frequency Notes/Aircraft Only Frequencies
Base Loaded Antenna
G14
The XP9303 transmitter employs a plug-in module for
the transmitter. Per FCC regulation, the transmitter crystal
in the module should only be changed by a certified
technician. Changing of the transmitter crystal by a non-
authorized technician could result in a violation of FCC
rules.
The XP9303 can transmit in either Pulse Code Modulation
(SPCM) or Pulse Position Modulation (PPM, commonly
referred to as FM).
Be certain to observe the following guidelines:
An eyelet is provided on the face of the XP9303
transmitter that allows you to connect a Neck Strap
(JRPA023). This hook has been positioned so that your
transmitter has the best possible balance when you use
the neck strap.
An optional base-loaded antenna is available for use with
the XP9303 transmitter. It is considerably shorter than
the standard antenna. However, the base loaded antenna
cannot be collapsed for storage inside the transmitter. You
must also use an adapter (JRPA156) to attach the antenna
to your XP9303. The Base Loaded Antenna (JRPA155) is
made of a flexible coil and is covered with a soft plastic
material. Your range will not be affected when using the
base loaded antenna.
Do not operate your transmitter when another transmitter
is using the same frequency, regardless of whether the
second transmitter is PCM, PPM (FM) or AM. You can
never operate two transmitters on the same frequency
simultaneously without causing interference.
Aircraft-Only Frequencies
JR® Transmitters and receivers are available in 72MHz
frequencies in the United States for use with model
aircraft. Employing 72MHz frequencies does not
require a special operator’s license from the Federal
Communications Commission (FCC).
• A chart for all available frequencies is located on
page I-3 of this manual.

Installation Requirements
Flash Memory
Connections:
Battery Alarm and Display
G15
It is extremely important that your radio system be
correctly installed in your model. Here are a few
suggestions for installing your JR® equipment:
1. Wrap the receiver in protective foam rubber that is
no less than 3/8 inch thick. Secure the foam to the
receiver with #64 rubber bands. This protects the
receiver in the event of a crash or a very hard landing.
2. The servos should be mounted using rubber grommets
and brass eyelets to isolate them from vibration. Do
not over-tighten the mounting screws; this will negate
the vibration absorption effect of the rubber grommets.
The following diagram will assist you in properly
mounting your servo.
The brass eyelets are pushed from the bottom up in the
rubber grommets. When the servo screw is tightened
securely, it provides the proper security as well as the
proper vibration isolation for your servo.
3. The servos must be able to move freely over their
entire range of travel. Make sure that the control
linkages do not bind or impede the movement of any
of the servos.
4. Mount all switches away from the engine exhaust and
away from any high vibration areas. Make sure the
switch operates freely and is able to operate over its
full travel.
5. Mount the receiver antenna firmly to the airplane
to ensure that it will not become entangled in the
propeller or control surfaces.
All preprogrammed data is protected by a flash memory
that guards against main transmitter battery failure.
Note Separate drawings for Acro, Sailplane and
Helicopter with typical plug order, switch location,
and battery pack connections.
When the transmitter voltage drops below 9.0 volts DC,
the display flashes “BATT LOW” and an alarm sounds.
If you are flying when this occurs, land immediately.
Servo Mounting Tab
Screw
Rubber Grommet
Brass Eyelet

A1
AIRPLANE – ACRO MODE
INTRODUCTION
The ACRO mode of the XP9303 system is intended for
powered fixed-wing aircraft. It contains a host of advanced
features that are easy to set up and use, and are designed
to assist the pilot in realizing the full potential of the
aircraft. These features include but are not limited to:
• Switch Assignments
• Flight Modes (3)
• Dual Rates/Exponential (2 or 3 sets for Aileron,
Elevator and Rudder)
• Wing Type (Normal, Flaperon, Delta)
• Aileron Differential
• V-Tail
• Dual Channels for All Primary Flight Controls
and Flaps
• Dual Throttles (With Independent Trims and
Throttle Curves)
• Adjustable Trim Rates (10–100 Trim Steps)
• Built-In Elevator-To-Flap Mixing
• Built-In Aileron-To-Rudder Mixing
• Throttle Curves (2)
• Flap System (With Elevator Trim, Auto Land,
Elevator/Flap Delay)
• Snap Roll System (4 Directions/Rates Assigned to
Flight Modes)
• Gyro System (In-Flight Gain Selection of 3 Gains
for up to 2 Gyros)
• Servo Speed (Independent in Both Directions
– Eliminates Door Sequencers)
• 6 Programmable Mixers (Includes 2 Multi-Point
Mixers)
• Fail Safe (Hold or Predetermined Positions)
• Trainer System (Selectable Channels for Student
Control)
• Timers (Stopwatch, Countdown, Integrated)
• Servo Monitor (Automatically Renames Channels
According to Assignments)
In addition to the numerous features listed above, the
XP9303 provides the ability to combine these features
during flight, using a single Flight Mode switch. This
capability dramatically reduces the pilot’s work load,
allowing the pilot to concentrate on flying the aircraft
instead of worrying about how to operate the transmitter
(TX).
ACRO PROGRAMMING - PLEASE
READ
For those who are comfortable with programming and
would like to dive right in with a minimum amount of
explanation, there are a few ACRO programming
examples at the end of this manual. Those who are not
so inclined are encouraged to continue reading this part
of the manual in order to acquire an understanding of
the basic XP9303 programming philosophy, functions,
and techniques.
The XP9303 menus and functions are presented
here in the order that they should be addressed
when setting up a new aircraft. It begins with
entering the SYSTEM Menu, selecting a model and
activating the ACRO mode and progresses through the
remainder of the SYSTEM Menu options and then
through the individual functions. The descriptions are
general in nature and provide enough information to
identify the purpose of a function, to decide whether or
not to use a function, and what types of selections and
settings to make.
Those who have some experience with computer-based
radios will probably be able to program their aircraft
as they read through this section, owing to the fact that
the individual functions are generally simple in nature
and the XP9303 is a very intuitive system. In
those instances where more detailed information is
desired/required for a particular function, detailed
descriptions of the ACRO functions are included at
the end of the ACRO section.
ACRO - GETTING STARTED – SYSTEM
MENU BASICS
Getting started always begins with accessing the SYSTEM
Menu. This is where models are selected, the mode is
identified, modulation type is indicated, and where other
high-level information is collected about the model.
It is also used to activate some of the more advanced
programming features such as Flight Modes, Switch
Assignments, Wing Type and Dual Control information.

ACCESS THE SYSTEM MENU
A2
The first thing to do when setting up a new model is
to select a model memory for it. It is best to select an
unused model memory, however, a memory that already
contains data for another model may be used, so long
as data for that model is no longer required because any
data in that memory will be lost.
1. In the SYSTEM Menu, highlight and select Model
SEL using the Selector. The currently selected model
number is displayed. If a different model is to be
selected, highlight and select the displayed model and
a list of models will appear. Scroll up and down the list
using the Selector.
2. Use the Selector to highlight and select the desired
model memory.
3. Return to the SYSTEM Menu by pressing the LIST
button.
1. The System menu [SYSTEM M.] is obtained by
holding down the ENT button while turning the
transmitter on.
SELECT A MODEL MEMORY
INFO-DISP
Model SEL
MDL Name
Type SEL
MDL Reset
MODULAT.
TRANSFER
TRIM STEP
Devic. SEL
Wing TYPE
[SYSTEM M.]
Select
��MODEL 2 ACRO PPM
[Model SEL]
Select�� � 30 HELI� SPCM
� � � 1 GLID� SPCM
MODEL 2� MODEL 2 ACRO� PPM
� � � 3 ACRO� SPCM
� � � 4 GLID� SPCM
[Model SEL]

RESET THE MODEL
A3
When setting up a new model it is important to reset
all parameters to their default or factory settings
before proceeding with any other programming. This
is to ensure that there are no program mixes, trims or
other “surprises” left over from a previous model or
programming session.
1. In the SYSTEM Menu, highlight and select MDL
Reset using the Selector.
2. Press the CLR button that is next to RES
on the display.
3. Press the lowermost button next to YES on the display
to reset all data for this model.
4. Return to the SYSTEM Menu by pressing
the LIST button.
[MDL Reset]
LST
RES
MODEL 2� ACRO�PPM
[MDL R�eset]
LST
NO
YES
MODEL 2� ACRO�PPM
Are you sure? Y/N

TO ACTIVATE THE ACRO MODE
ENTER A NAME FOR THE MODEL
A4
After having selected and reset a model memory, it is time
to tell the TX that the ACRO mode is to be used for this
aircraft.
1. In the SYSTEM Menu, highlight and select Type SEL
using the Selector.
2. Highlight and select ACRO using the Selector.
3. Return to the SYSTEM Menu by pressing
the LIST button.
Each model should be given a name to make it easy
to identify in the model memory list and to identify the
current model on the main display screen. The model
name appears in the upper right hand corner of the main
screen when the transmitter (TX) is switched on.
1. In the SYSTEM Menu, highlight and select MDL
Name using the Selector.
2. The cursor (the little triangle that indicates where the
next character will be placed), is positioned at the
beginning of the model name. Press the Selector to
obtain a list of available characters.
3. Highlight and select the desired character to form the
model name. After the character is selected, rotate
the Selector to position the cursor where the next
character is to be placed and press the Selector to
obtain the character list again. Repeat until the model
name is completed.
4. Return to the SYSTEM Menu by pressing the LIST
button.
[Type SEL]� � MODEL 2 ACRO
GLID�� ACRO� � HELI
� MODEL 3� ACRO <H9 EXTRA> SPCM
[MDL Name]
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SELECT A MODULATION TYPE
A5
The XP9303 system supports two types of modulation
– SPCM and PPM (FM). The correct modulation type
must be selected to match the receiver in the aircraft or
the system will not function.
1. In the SYSTEM Menu, highlight and select
MODULAT. using the Selector.
2. Highlight and select Modulation and then select
either SPCM or PPM to match the receiver in the
aircraft.
3. Return to the SYSTEM Menu by pressing
the LIST button.
[MODULAT.]
MODEL 2� ACRO
Modulation
SPCM PPM