JRpropo XP8103 User Manual
AIRCRAFT SYSTEM - AIRPLANE MODE
USER MANUAL
AIRCRAFT SYSTEM - GLIDER MODE
HELICOPTER SYSTEM - HELICOPTER MODE
8 CHANNELS 10 MODEL MEMORY 3 MODEL TYPE S • Z PCM/PPM SELECTABLE
THE
ULTIMATE
RADIO CONTROL
SYSTEM
XP8103 2
Airplane Mode Helicopter Mode Glider Mode
1-2-3 Programming
System Set-Up Mode
Function Mode
ENT
UP – MODE – DN
Push these two buttons
simultaneously and
hold.
Turn the power switch
ON (up).
ENT
UP – MODE – DN
Push these two buttons
simultaneously.
Turn the power switch
ON (up).
1
ENT
UP – MODE – DN
Scroll through options
using one of these
buttons.
3
2
ENT
UP – MODE – DN
Scroll through the
functions using one of
these buttons.
1
3
2
[INFO-DISP]
↕
Pg. 28 Information Display
Pg. 29 Model Select and Copy
Pg. 29 Model Name Input
Pg. 30 Model Type Selection Function
Pg. 30 Data Reset
Pg. 31 Modulation Selection
Pg. 32 Data Transfer between traqnsmitters
Pg. 34 Wing Type Selection
Pg. 35 Spoiler Channel Input Selection
Pg. 36 Dual Rate Exponential
Pg. 38 Reverse Switch
Pg. 38 Sub-Trim
Pg. 39 Travel Adjust (end point adjustment)
Pg. 39 Elevator to Flap Mixing
Pg. 40 Aileron to Rudder Mixing
Pg. 41 Landing System
Pg. 42 Snap Roll
Pg. 44 Differential Aileron Mixing (only if flaperon or
elevons mixing is active)
Pg. 45 Trim Offset Memory
Pg. 46 Flap Knob Operating Value Adjustment
Pg. 47 Programmable Mixing 1
Pg. 47 Programmable Mixing 2
Pg. 47 Programmable Mixing 3
Pg. 47 Programmable Mixing 4
Pg. 47 Programmable Mixing 5
Pg. 47 Programmable Mixing 6
Pg. 50 Fail-Safe/Hold (PCM Only)
Pg. 52 Trainer
Pg. 54 Timer
Pg. 55 Servo Output Values
Pg. 106 Information Display
Pg. 106 Model Select And Copy Function
Pg. 107 Model Name Input
Pg. 108 Model Type Selection Function
Pg. 108 Data Reset
Pg. 109 Modulation Selection
Pg. 110 Model Data Transfer
Pg. 112 Wing Type Selection
Pg.112 Flap Channel Input Selection
[INFO-DISP]
↕
Pg. 113 Dual Rate/Exponential
Pg. 114 Reverse Switch
Pg. 114 Sub-Trim
Pg. 115 Travel Adjustment
Pg. 115 Elevator To Flap Mixing
Pg. 116 Aileron To Flap Mixing
Pg. 117 Differential
Pg. 118 Flap To Elevator Mixing
Pg. 119 Flap To Aileron Mixing
Pg. 120 Aileron To Rudder Mixing
Pg. 121 Butterfly Mixing (Crow)
Pg. 122 Dual Flap Trim
Pg. 123 Trim Offset
Pg. 125 Programmable Mixing
Pg. 125 Programmable Mixing
Pg. 125 Programmable Mixing
Pg. 125 Programmable Mixing
Pg. 125 Programmable Mixing
Pg. 125 Programmable Mixing
Pg. 127 Fail-Safe (PCM Only)
Pg. 130 Trainer
Pg. 131 Timer Setting
Pg. 133 Servo Output Monitoring
(Only available when Dual Flap
setting is active)
[INFO-DISP]
Pg. 66 Information Display
Pg. 66 Model Selection and Copy Function
Pg. 67 Model Name Input
Pg. 68 Model Type Selection
Pg. 68 Data Reset
Pg. 69 Modulation Selection
Pg. 70 Data Transfer
Pg. 72 Aux 2, channels can be used for gyro
sensitivity adjustment
Pg. 73 Dual Rate Exponential
Pg. 75 Reverse Switch
Pg. 75 Sub-Trim Adjustment
Pg. 76 Servo Travel Adjust (End Point Adjustment)
Pg. 76 Stunt Trim
Pg. 77 Throttle Hold
Pg. 78 Throttle Curve
Pg. 81 Pitch Curve
Pg. 83 Inverted Flight
Pg. 84 Revolution/Acceleration Mixing
Pg. 85 Gyro Sensitivity Adjustment
Pg. 87 Programmable Mixing 1
Pg. 87 Programmable Mixing 2
Pg. 87 Programmable Mixing 3
Pg. 91 Fail-Safe/Hold (PCM Only)
Pg. 94 Trainer
Pg. 95 Timer Setting
Pg. 97 Servo Output Indicator
ON
ON
XP8103 4
1-2-3 Programming Charts .........................3
Table of Contents ...............................4
I. Introduction
How to Use This Manual...........................8
2. Features
2.1 Transmitter NET-G128FS/HS Computer.........8
2.2 Receiver .............................9
2.3 Servo Features.........................9
3. Component Specifications
3.1 System Specifications (Air/Heli).............10
3.2 Transmitter Specifications (Air/Heli) ..........10
3.3 Servo Specifications ....................11
3.4 Receiver Specifications...................11
3.5 Charger Specifications...................11
3.6 Airborne Battery Pack ...................11
4. Battery Charging
4.1 Transmitter/Receiver ....................14
4.2 Charger ............................14
5. General Information
5.1 Control Stick Length Adjustment .............15
5.2 Control Stick Tension Adjustment ............15
5.3 Transmitter Rear........................16
5.4 DSC Cord...........................17
5.5 Neck Strap Adjustment ..................17
5.6 Base Loaded Antenna ...................17
5.7 Frequency Notes/Aircraft Only Frequencies.....18
5.8 Lithium Battery Indicator/Backup Error Display . . . 18
5.9 Screen Contrast Adjustment................19
5.10 Installation Requirements..................19
1. Transmitter Controls
1.1 Control Identification and Location...........22
A. Airplane Version Tx .................22
B. Heli Mode.......................23
C.Glider Mode .....................23
1.2 Connections .........................24
2. General Information
2.1 Input Key Functions .....................25
2.2 Normal Display .......................25
3. System Set-Up Mode Functions
3.1 System Set-Up Mode....................26
3.2 Function Mode........................27
3.3 List Mode ...........................28
3.4 Model Select.........................28
3.5 Copy Select Function ...................29
3.6 Model Names........................29
3.7 Model Type Selection ...................30
3.8 Data Reset...........................30
3.9 Modulation Select......................31
3.10 Data Transfer .........................32
3.11 Wing Type Selection....................34
3.12 Spoiler Channel Input Selection.............35
4. Function Mode Functions
4.1 Dual Rate, Exponential...................36
4.2 Automatic Dual Rate, Exponential ...........37
4.3 Reverse Switch........................38
4.4 Sub-Trim Adjustment.....................38
4.5 Travel Adjust .........................39
4.6 Elevator to Flap Mixing ..................39
4.7 Aileron to Rudder Mixing .................40
4.8 Landing System .......................41
4.9 Snap Roll ...........................42
4.10 Differential Aileron Mixing ................44
4.11 Trim Offset Memory ....................45
4.12 Flap Knob Adjustment ...................46
4.13 Programmable Mixing...................47
4.14 Fail-Safe/Hold........................50
4.15 Trainer .............................52
4.16 Timer ..............................54
4.17 Servo Output Indicator...................55
5. XP8103 Data Sheet ........................56
1. Transmitter Controls
1.1 Control Identification and Location...........58
A.Helicopter Version Tx..................58
B. Airplane Mode .....................59
C.Glider Mode .......................59
1.2 Switch Warning Safety Feature (Heli Mode) ....60
1.3 Connections .........................60
1.4 Gyro Connections .....................61
2. General Information
2.1 Input Key Functions .....................62
2.2 Normal Display .......................62
2.3 Aux 3 Function (Channel #8) ..............63
3 System Set-Up Mode Functions
3.1 System Set-Up Mode....................64
3.2 Function Mode........................65
3.3 List Mode ...........................66
3.4 Model Select ........................66
3.5 Copy Select Function .................. 67
3.6 Model Names ....................... 67
3.7 Model Type Selection .................. 68
3.8 Data Reset ......................... 68
3.9 Modulation Select .................... 69
3.10 Data Transfer ........................ 70
3.11 Input Selection Function ................. 72
Table of Contents
II. Common Features
I. Introduction
III. Airplane Section
IV. Helicopter Section
XP8103 5
4. Function Mode Functions
4.1 Dual Rate, Exponential...................73
4.2 Automatic Dual Rate, Exponential............74
4.3 Reverse Switch ........................75
4.4 Sub-Trim Adjustment ....................75
4.5 Travel Adjust .........................76
4.6 Stunt Trim............................76
4.7 Throttle Hold .........................77
4.8 Throttle Curve ........................78
4.9 Pitch Curve ..........................81
4.10 Inverted Switch........................83
4.11 Revolution/Acceleration Mixing ............84
4.12 Gyro Sensitivity Adjustment................85
4.13 Programmable Mixing ...................87
4.14 Fail-Safe/Hold ........................91
4.15 Trainer .............................94
4.16 Timer ..............................95
4.17 Servo Output Indicator...................97
5. XP8103 Data Sheet.........................98
1. Transmitter Controls
1.1 Control Identification and Location ..........100
A. Glider Mode ....................100
B. Airplane Mode ...................101
C.Heli Mode ......................101
1.2 Connections.........................102
2. General Information
2.1 Input Key Functions ....................103
2.2 Normal Display ......................103
3. System Set-Up Mode Functions
3.1 System Set-Up Mode...................104
3.2 Function Mode.......................105
3.3 List Mode ..........................106
3.4 Model Select ........................106
3.5 Copy Select Function ..................107
3.6 Model Names .......................107
3.7 Model Type Selection ..................108
3.8 Data Reset .........................108
3.9 Modulation Select ....................109
3.10 Data Transfer ........................110
3.11 Wing Type Selection ...................112
3.12 Input Selection .......................112
4. Function Mode Functions
4.1 Dual Rate Exponential ..................113
4.2 Reverse Switch .......................114
4.3 Sub-Trim Adjustment ....................114
4.4 Travel Adjust ........................115
4.5 Elevator To Flap Mixing .................115
4.6 Aileron To Flap Mixing ..................116
4.7 Differential Aileron Mixing ...............117
4.8 Flap to Elevator Mixing .................118
4.9 Flap to Aileron Mixing ..................119
4.10 Aileron to Rudder Mixing ................120
4.11 Butterfly Mixing (Crow) .................121
4.12 Dual Flap Trim .......................122
4.13 Trim Offset Memory ...................123
4.14 Programmable Mixing (1-6) ..............125
4.15 Fail-Safe/Hold .......................127
4.16 Trainer ............................130
4.17 Timer .............................131
4.1 8 Servo Output Indicator ..................133
5. Practical Applications.......................134
5.1 Setting Up Your Sailplane ................134
5.2 Basic Set-Up and Mixing ................134
5.3 Launch and Reflex Presets ................135
5.4 Landing Mode Program .................135
5.5 Full Span/Variable Crow/Camber..........136
5.6 Special Mixing .......................136
6. XP8103 Data Sheet ........................138
1. Servo Precautions .........................140
2. General Notes ...........................140
3. Federal Aviation Administration ................141
4. Daily Flight Checks ........................141
5. Frequency Chart ..........................142
6. Warranty Information
6.1 Warranty Coverage ...................143
6.2 Repair Service Directions ................143
6.3 Warranty Repairs .....................143
6.4 Normal Non-Warranty Repairs ............144
V. Glider Section
V. Important Information for All Versions
XP8103 6
XP8103 7
I. Introduction
XP8103 8
In the beginning of this manual you will find the specifications
for the radio and its various accessories. In addition, guidelines
for the initial installation of the accessories have been included.
For your convenience, this manual is arranged with a separate
sections for airplane, helicopter and glider software functions:
Airplane Software: Page 21
Helicopter Software: Page 57
Glider Software: Page 99
You will find instructions for setting all of the functions and
programs of the XP8103 to suit your personal preferences. These
features are discussed in the same order that they appear on
your radio, as you will see on the accompanying system
function mode programming charts. 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 also record it on a copy of the
data sheet provided. If you should experience memory loss or
battery failure, or want to make changes to the current settings,
this step will save you a great deal of time. In the back of this
manual you will find information on precautionary measures and
general guidelines for safe use of your new equipment.
Use of the Instructions With This Radio
As stated previously, while the XP8103 has a dedicated, or
single use, switch and potentiometer layout, it may be used for
multiple model types. We have provided control identification
diagrams with the manual that explain the different switch
configurations.
1. How To Use This Manual
2. Features
2.1 Transmitter NET-G128FS/HS Computer
• The micro computer system used in the XP8103 is the easiest to
understand, easiest to operate multi-function 8-channel computer
radio developed to date.
• The computer designed, ergonomically styled transmitter case
features a newly designed, large LCD display for outstanding,
easy-to-read graphics.
• The control sticks offer adjustable spring tension and length.
The throttle stick offers a ratchet for smooth travel (airplane only).
• Ten model memory storage allows programming of all
characteristics of ten separate helicopters, airplanes or gliders,
or you can program more than one set-up for a single aircraft,
allowing you to change the flight characteristics for that aircraft.
• Increased number of mixing functions that include multi-point
programmable mixing.
• Programmable gyro sensitivity with automatic adjustment
(helicopter only).
• All channel servo operation allows you to visually monitor
servo travel.
• A five-year lithium back-up battery prevents loss of memory in
the event that the battery discharges completely or is removed.
• Features automatic fail-safe and information update in PCM
mode when fail-safe is used.
• A programmable trainer function allows the student to practice
with individual channels separately.
• Direct Servo Control (DSC) permits operation of all the
controls and servos while also making transferable all data
between transmitters without generating a radio signal.
• Functions are also directly selectable from the newly employed
Function List Display.
• Screen contrast is easily adjustable for improved clarity in all
conditions.
XP8103 9
NER-649S (PCM Systems)
• This is a high performance PCM-FM single conversion receiver
with 10 KHz super narrow band ABC&W circuitry.
• The latest “S” type Central Processing Unit (CPU) is used in the
PCM receiver. The new NER-649S offers the highest resolution
available in any receiver.
• A narrow band ceramic filter for high signal selectivity also
assists in rejecting cross modulation from other common radio
frequencies (e.g., R/C transmitters, local paging systems). It has
the highest degree of resistance to electro-mechanical “noise” to
improve signal reception.
• This receiver features Direct Servo Control (DSC) permits
control of surfaces without radio frequency output.
• The receiver has low current consumption.
• 3-point gold plated connectors allow increased conductivity.
NER-549 (FM Systems)
• The NER-549 is a high performance FM single conversion
receiver with 10 KHz 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 (e.g., R/C transmitters, local paging systems).
• This receiver features Direct Servo Control (DSC) for control of
surfaces without radio frequency output.
• The receiver has low current consumption.
• 3-point gold plated connectors allow increased conductivity.
2.3 Servo Features
2.2 Receiver
507 Servo
• A zero deadband amplifier insures accurate neutral centering.
• The 507 has low current drain.
• An indirect drive feedback potentiometer gives additional
protection from vibration.
• Redesigned features include SMT (Surface Mount Technology)
circuitry.
• The 507 features a 3-pole ferrite cored motor.
517 Servo
• The 517 features a ball bearing output shaft for precise
movement of your aircraft’s control outputs.
• A zero deadband amplifier insures accurate neutral centering.
• The 517 has low current drain.
• An indirect drive feedback potentiometer gives additional
protection from vibration.
• Includes SMT (Surface Mount Technology) circuitry.
• The 517 features a 3-pole ferrite cored motor.
531 Servo
• The 531 features a ball bearing output shaft for precise
movement of your aircraft’s control outputs.
• A zero deadband high performance amplifier insures accurate
neutral centering and high torque (51oz./in.) with a speed of
.23 sec/60°.
• The 531 has low current drain.
• An indirect drive feedback potentiometer gives additional
protection from vibration.
• Includes SMT (Surface Mount Technology) Circuitry.
• The 531 features a 3-pole ferrite cored motor.
XP8103 10
3. Component Specifications
3.1 System Specifications (Air/Heli)
Aircraft Helicopter
System Name
XP-8103A XP-8103H
Transmitter Body NET-G128FS NET-G128HS
Transmitter RF Module
NET-J72P / NET-J50P / NET-J53P NET-J72P / NET-J50P / NET-J53P
Receiver NER-649S (PCM) NER-649S (PCM)
NER-549 (FM) NER-549 (FM)
Charger NEC-221 NEC-222
Airborne Battery 4N-600 (flat) 4N-1000 (Flat)
Servos
NES-507x4 NES-517x4 NES-517x5 NES-531x5
(FM Only) (PCM Only) (FM only) (PCM Only)
Accessories Deluxe Switch Deluxe Switch Deluxe Switch Deluxe Switch
12"ALIE Ext. 12"AILE Ext. 12"AILE Ext 12"AILE Ext.
Charge Jack Charge Jack Charge Jack Charge Jack
Servo Accys Servo Accys Servo Accys Servo Accys
Hex Wrench Hex Wrench Hex Wrench Charge Jack
Instruction Instruction Instruction Instruction
Manual Manual Manual Manual
3.2 Transmitter Specifications (Air/Heli)
Aircraft Helicopter
Model Number
NET-G128FS NET-G128HS
Encoder 8-Channel Computer System 8-Channel Computer System
RF Module 50/53/72MHz 50/53/72MHz
Modulation PCM (S or Z) or PPM PCM (S or Z) or PPM
Output Power Approximately 750mw Approximately 750mw
Current Drain 200mA (70mA with DSC) 200mA (70mA with DSC)
Power Source
1.2Vx8 NiCad (9.6v) 550mAh 1.2Vx8 NiCad (9.6v) 550 mAh
Output Pulse 1000-2000 (1500 Neutral) 1000-2000 (1500 Neutral)
XP8103 11
3.3 Servo Specifications
3.4 Receiver Specifications
3.5 Charger Specifications
Aircraft Helicopter
Model Number
NEC-221 NEC-222
Input Voltage AC 100-120V AC 100-120V
Output Current 50mA Tx / 50mA Rx 50mA Tx / 120mA Rx
Charging Time 15 Hours 15 Hours
3.6 Airborne Battery Pack
Aircraft Helicopter
Model Number
4N-600 (Flat) 4N-1000 (Flat)
Voltage 4.8V 4.8V
Size (in.) (W x L x H) 2.24 x 0.59 x 2.05 2.60 x 0.63 x 1.70
Weight (oz.) 3.3 4.9
PCM FM
Model Number
NER-649S NER-549
Type 9-Channel / FM-ABC&W / S-PCM 9-Channel / FM-ABC&W / Micro
Frequency 50/53/72MHz 50/53/72MHz
Sensitivity
(Microseconds)
5µS Minimum 5µS Minimum
Selectivity 8KHz / 50dB 8KHz / 50dB
Weight (oz.) 1. 5 1.5
Size (in.) (W x L x H) 1. 42
x 2.00 x 0.63 1.42 x 2.00 x 0.82
Receiver Antenna 39” for all Aircraft Frequencies 39” for all Aircraft Frequencies
507 517 53 1
Torque (oz./in.)
40.3 40.3 51 .0
Speed (sec./60°) .2 5 .25 .2 3
Weight (oz.) 1. 4 7 1. 5 8 1.50
Size (in.) (W x L x H) 1.52 x 0.73 x 1.32 1.52 x 0.73 x 1.32 1.52 x 0.73 x 1.32
BB N/A Single Single
Motor 3-Pole Ferrite 3-Pole Ferrite 3-Pole Ferrite
XP8103 12
XP8103 13
II. Common Features
14
Note: It is imperative that you fully charge both the transmitter
and the receiver battery packs prior to each flight.
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 50 mA for the transmitter and
50 mA (120 mA for helicopter) for the receiver battery pack.
Transmitter Polarity
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.
XP8103
4. Battery Charging
4.1 Transmitter/Receiver
4.2 Charger
The pilot lamps should always be ON during the charging
operation. If they’re not, check to make sure that both the
transmitter and receiver are switched OFF.
Do not use this charger for equipment other than JR. The
charging plug polarity may not be the same and equipment
damage can result.
Do not use other manufacturers’ after-market accessories that
plug into the transmitter’s charging jack. If you do, any damage
that results will not be covered by the warranty. If you are unsure
of compatibilities with your radio, seek expert advice before
doing anything to avoid possible damage.
During the charging operation, the charger’s temperature is
slightly elevated. This is normal. Also, note that the voltage
shown on the charger is higher than the battery in use. This
voltage cannot be measured with a voltmeter. Only current can
be measured with any accuracy using this type of charger.
Be sure to use the proper charge rate (120 mA) when using
battery packs of 1000 mAh or larger for your receivers.
D.S.C
TRAINER
CHARGE
(–) (+)
Center pin
is negative
Outside is
positive
Red to negative
Black to positive
Red = Positive
Brown = Negative
Orange = Signal
Back of Transmitter
Charger Pigtail for Transmitter
Charger Pigtail to Receiver
Transmitter
Receiver
Elevator Tension Screw
Aileron Tension Screw
Throttle Tension Screw
Rudder Tension Screw
15
The XP8103 allows you to adjust the control sticks’ length.
To adjust the stick length, use the 2 mm Allen wrench (supplied
with your XP8103 transmitter) to unlock the set screw.
Note: 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 2 mm set screw.
If you desire longer sticks, JR offers a thicker stick (JRPA047) that
is approximately one inch longer than the standard stick. This
stick, crafted from bar stock aluminum, is available at your local
JR dealer.
Remove the transmitter RF module, Nicad battery, and six (6)
transmitter back cover screws. Remove the transmitter back,
being careful not to bend or damage the RF module pins. Adjust
each screw for the desired tension (counterclockwise to loosen
stick feel, clockwise to tighten stick feel). When adjusting the
throttle ratchet tension, make sure the adjusting screw does not
touch the PC board after the adjustment is complete.
XP8103
5.1 Control Stick Length Adjustment
5.2 Control Stick Tension Adjustment
5. General Information
Loosen
Tighten
16XP8103
5.3 Transmitter Rear
Cord Hook
When a trainer cord is used, place the
cord between this hook and the
transmitter body to avoid possible cord
detachment during use.
Transmitter Module
When the transmitter module is removed,
you will find that the fuse is located at the
bottom of the module cavity for easy
replacement.
DSC/Trainer Jack
Charging Jack for
Nicad Battery Only
(8N600S)
Battery Cover (Removed)
Caution: The battery connector is keyed so that it
can only be plugged in in one direction. Do not
force.
XP8103 17
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 (optional) 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. Turn the switch harness to the ON position.
Note: The DSC function will only operate with the JRPA001
Deluxe Switch Harness, or the JRPA004 Charge Switch.
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
airplanes without drawing the fully operational 200 mAh from
your transmitter battery pack. Instead, you will only draw 70
mAh 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
airplane and not interfere with the other pilot’s aircraft.
Note: Under no circumstances should you attempt to fly your
airplane with the DSC cord plugged in! This function is for
bench checking your airplane only.
5.4DSC Cord
An eyelet is provided on the face of the XP8103 transmitter
which 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.
Note: Double check to ensure that the neck strap is securely
fastened to the transmitter.
5.5Neck Strap Adjustment
An optional base loaded antenna is available for use with the
XP8103 transmitter. It is considerably shorter than the standard
antenna. However, the base loaded antenna cannot be
collapsed for storage in the side of the transmitter. You must also
use an adaptor (JRPA156) to attach the antenna to your XP8103.
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.
5.6 Base Loaded Antenna
A
B
C
A. Charge cord/DSC receptacle
B. Switch harness lead
C. Charge cord/DSC lead
XP8103 18
The XP8103 employs a plug-in module system for transmitter
frequency changes. If you want to change a frequency, you can
simply change the radio frequency (RF) module, commonly
referred to as either an RF module or transmitter module. The JR
modules are universal for all modular frequency controlled
systems. In other words, if you currently own a modular JR
system, you can use the RF module from your current system with
the XP8103.
The XP8103 can transmit in either Pulse Code Modulation (PCM)
or in Pulse Position Modulation (PPM, commonly referred to as
FM). Be certain to observe the following guidelines:
1. 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 to both receivers and crashing both aircraft.
2. For operation of your XP8103 with additional receivers, you
should refer to the receiver compatibility chart. The chart is
located in the Modulation Select Section of this manual.
(pg. 31)
Aircraft Only Frequencies
JR RF modules and receivers are available on 50, 53, and 72
MHz frequencies in the United States for use with model aircraft.
Employing 72 MHz frequencies does not require a special
operators license from the Federal Communications Commission
(FCC). However, the 50 and 53 MHz frequencies require that
you carry a Technician II license.
• A chart for all available frequencies is located on page 142
of this manual.
5.7Frequency Notes/Aircraft Only Frequencies
5.8 Lithium Battery Indicator/Backup Error Display
Lithium Battery Indicator
If the voltage level of the lithium battery drops below an
acceptable level (2.2v), an “L” will appear and flash to the left
of the model number. This indicates that the lithium battery will
no longer maintain program memory if the main battery is
disconnected. When the flashing “L” appears on the screen, the
system should be sent to the JR/Horizon Service Center for a
lithium battery replacement.
Alarm and Backup Error Display
All pre-programmed data is protected by a five-year lithium
battery that guards against main transmitter battery failure.
Should the lithium battery fail, the display will indicate 1 back
up error regardless of the position of the ON/OFF switch. If
this occurs, it will be necessary to replace the battery and
reprogram all data. All transmitter programs will return to the
factory default setting, and the data you have input will be lost.
When it becomes necessary to replace the lithium back-up
battery, contact the JR/Horizon Service Center. Due to the
possibility of extensive damage caused by improper removal or
replacement, only the JR/Horizon Service Center is authorized
to make the change.
JR/Horizon Service Center
4105 Fieldstone Road
Champaign, IL 6182 1
"L" indicates
lithium battery
needs to be
replaced
XP8103 19
5.9 Screen Contrast Adjustment
The screen contrast adjustment feature of the XP8103 allows the
user to select the proper tint of the screen for improved clarity
and visibility in all weather conditions and temperatures.
To increase the contrast (darken the screen), simply turn the
power switch ON and press the SEL and DATA + keys
simultaneously. To decrease the contrast (lighten the screen),
press the SEL and DATA - keys simultaneously.
5.10Installation Requirements
It is extremely important that your radio system be correctly
installed in your model. Here are a few suggestions on the
installation of 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 bushings to isolate them from vibration. Do not over-tighten
the mounting screws — this will negate the vibration absorption
effect of the rubber grommets. The diagram at left will assist you
in properly mounting your servo.
The brass bushings 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 each 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.
Screw
Servo Mounting Tab
Brass Bushing
Rubber Grommet
XP8103 20
ACRO 21
III. Airplane Section
ACRO 22
1. Transmitter Controls
1.1 Control Identification and Location
Channel Assignment/Throttle ALT
Channel # TX Function Airplane Function
1 Thro Throttle Channel
2 Aile Aileron Channel
3 Elev Elevator Channel
4 Rudd Rudder Channel
5 Gear Gear Channel
6 Flap Auxillary 1 Channel (Flap)
7 SPOI Auxillary 2 Channel (Spoiler)
8 Aux 3 Auxillary 3 Channel
Throttle ALT
The Throttle ALT function makes the throttle stick trim active only
when the throttle stick is at less than half throttle. This gives easy,
accurate idle adjustments without affecting the high throttle
position.
Throttle/Rudder Stick
Input Keys
Aileron Trim
Elevator Trim
Elevator/Aileron Stick
Antenna
Aux 3 Knob
Carrying Handle
LCD Display (Do Not Press)
Flap Knob
Aileron Dual Rate Switch
Rudder Dual Rate Switch
P. Mix Switch/Aux 2
Power Switch
Rudder Trim
Throttle Trim
Neck Strap Eyelet
Snap Roll/
Timer/T rainer Switch
Aux 2 Knob
Elevator Dual Rate Switch
Gear Switch
Flap/Mixing Switch
Flaperon/Flap Trim Knob (Pot. 7)
Snap Roll/
Timer/Trainer Switch
Crow Switch
Elevator Dual Rate Switch
Flap/Mixing Switch
Spoiler Trim
Spoiler/Rudder Stick
Neck Strap Eyelet
Rudder Trim
Power Switch
Input Keys
Aileron Trim
Aileron/Elevator Stick
Elevator Trim
Flap Trim Knob (Pot. 6)
Aileron Dual Rate Switch
Rudder Dual Rate Switch
Mixing Switch
Carrying Handle
LCD Display –
DO NOT PRESS
Antenna
Dual Flap Aileron Trim Knob (Pot. 5)
Reflex
■-Off
Launch
Pitch Trim Knob
Trainer/Timer Switch
Invert Switch
Elevator Dual Rate Switch
Flight Mode Switch
Throttle Trim
Throttle/Rudder Stick
Neck Strap Eyelet
Rudder Trim
Power Switch
Input Keys
Aileron Trim
Aileron/Elevator Stick
Elevator Trim
Hovering Throttle Knob
Aileron Dual Rate Switch
Rudder Dual Rate Switch
Throttle Hold Switch
Carrying Handle
LCD Display –
DO NOT PRESS
Antenna
Hovering Pitch Knob
N-Normal Position
1-Flight Mode 1
2-Flight Mode 2
ACRO 23
Channel Assignment
Channel Assignment
Airplane Version Transmitter–Glider Mode
Airplane Version Transmitter–Heli Mode
1. SPOI Spoiler Channel
2. AIL1 Left Aileron Channel
3. ELEV Elevator Channel
4. RUDD Rudder Channel
5. AIL2 Gear Channel
(Right Aileron Channel–AILE 2)
6. FLAP Auxiliary 1 Channel
(Left Flap Channel for Dual Flaps)
7. AUX 2 Auxiliary 2 Channel
(Right Flap Channel for Dual Flaps)
8. AUX 3 Auxiliary 3 Channel
1. THRO Throttle Channel
2. AILE Aileron Channel
3. ELEV Elevator Channel
4. RUDD Rudder Channel
5. GEAR Gear Channel
6. AUX 1 Auxiliary 1 Channel (Pitch)
7. AUX 2 Auxiliary 2 Channel
(Gyro Sensitivity)
8. AUX 3 Auxiliary 3 Channel
ACRO 24
1.2 Connections
Aux Channel
Aux Channel
Spoiler Channel
Flap Channel
Retract
Gear Channel
Deluxe Switch Harness
(JRPA001)
Charge Cord or DSC
Receptacle
(JRPA024)
72
NER-649S
S-PCM Receiver
(JRPR649)
PCM Version
NER-549S
FM Receiver
(JRPR549)
FM Version
4N600
4.8V 600mAh
JAPAN REMOTE CONTROL CO., LTD.
®
not
used
ACRO 25
• You will hear a clicking (beeping) sound to confirm input has
been achieved.
• Except for the CLEAR key, the AUTO advance system (two
speed scrolling) is active when you continue pressing down on
a key.
• The SEL keys or CH keys are used to scroll through, or
manipulate functions within a specific program or display.
2.1 Input Key Functions
Function Selection keys
(press both keys
simultaneously to enter or
exit the function mode)
Normal Display Screen
Press both keys simultaneously
to access the system mode or
function mode lists.
used for changing pages or
indicated displays
used for channel changes in the
model set-up and function modes
Data Entry Keys
Up Key
Down Key Select Key Channel Key Increase Key Decrease Key
Clear Key
2.2 Normal Display
2. General Information
transmitter voltage
model number
modulation type
model name (when
names are entered)
integrated timer
SELECT
L/+
R/-
CLEAR
ACRO 26
2.2 Normal Display, cont.
DN
SELECT
CH CH CLEARUP
Press simultaneously
to access the List
Mode/System Set-Up Mode
Press Select and
either the + or - keys
simultaneously to
adjust the contrast of
the LCD display
Press the Clear key
to reset to factory
settings
Press the UP and DN keys
simultaneously to change
to Function Mode (with
power switch ON)
When timer function is
active, use CH key to
start/stop timer
Press the UP and DN keys
simultaneously and switch the
power from OFF to ON to
change the system to the
System Set-Up Mode
To set the System Set-Up Mode, press the UP and DN keys
simultaneously and turn the power switch from OFF to ON.
Functions are selectable by pressing either the DN or UP keys.
Individual settings are explained later at each function. In this
mode, servos are not activated, but operating signals are
transmitting (only when the Tx module is in place). However, use
extra caution not to interfere with other frequencies. By pressing
the DN and UP keys simultaneously, you can return to the normal
display, which allows the servos to again operate.
3.1 System Set-Up Mode
[INFO-DISP]
↕
From the Normal Display, the following inputs can be made:
When setting various functions with the buttons shown below,
start either in the Function Mode or the System Set-Up Mode.
3. System Set-Up Mode Functions
Pg. 28 Information Display
Pg. 29 Model Select and Copy
Pg. 29 Model Name Input
Pg. 30 Model Type Selection Function
Pg. 30 Data Reset
Pg. 31 Modulation Selection
Pg. 32 Data Transfer between traqnsmitters
Pg. 34 Wing Type Selection
Pg. 35 Spoiler Channel Input Selection
SYSTEM SET-UP MODE
Use either the UP
or DN key to scroll
through the menu
and access the
applicable function
ACRO 27
From Normal Display, press the UP and DN keys simultaneously
to enter the Function Mode. In this mode, by using the UP or DN
keys, the desired functions can be selected. When channel
selection or an additional function change is desired, use the
CH keys or SEL key. For example, Dual Rate Function is selected
and the elevator channel is displayed by pressing the UP key
once; the function is changed to the next mode, Reverse Switch,
but the channel is still displayed as elevator.
Function Mode Flowchart
Information pertaining to each function is explained on the page
number listed next to the function name. Functions will appear
on the screen in the same order they are shown on the flow
chart below:
Therefore, by scrolling through the program, you can adjust
each function related to the elevator channel quickly and easily.
To Access The Function Mode
1. Switch the power switch to the ON (upper) position.
2. Press the UP and DN keys simultaneously.
3. Use either the UP or DN keys to scroll through the menu and
access the appropriate function.
3.2 Function Mode
Pg. 36 Dual Rate, Exponential
Pg. 38 Reverse Switch
Pg. 38 Sub-Trim
Pg. 39 Travel Adjust (end point adjustment)
Pg. 39 Elevator to Flap Mixing
Pg. 40 Aileron to Rudder Mixing
Pg. 41 Landing System
Pg. 42 Snap Roll
Pg. 44 Differential Aileron Mixing (only if flaperon or
elevons mixing is active)
Pg. 45 Trim Offset Memory
Pg. 46 Flap Knob Operating Value Adjustment
Pg. 47 Programmable Mixing 1
Pg. 47 Programmable Mixing 2
Pg. 47 Programmable Mixing 3
Pg. 47 Programmable Mixing 4
Pg. 47 Programmable Mixing 5
Pg. 47 Programmable Mixing 6
Pg. 50 Fail-Safe/Hold (PCM Only)
Pg. 52 Trainer
Pg. 54 Timer
Pg. 55 Servo Output Values
Use either the UP
or DN key to scroll
through the menu
and access the
applicable function
ACRO 28
3.4 Model Select (System Set-Up Mode)
The XP8103 transmitter employs a memory function which
memorizes data for up to 10 individual aircraft. All settings
along with type selection, function, and different aircraft are
used by one transmitter. For example, Model 1 is helicopter and
Model 2 is airplane. To avoid confusing models, inputing model
names for each aircraft is recommended (see page 29). Press
the UP and DN keys simultaneously and turn the power switch
ON to access the System Set-Up Mode.
The display below shows the model selection function.
model name
(if dot is shown, model
name is blank)
modulation
type
model number (1-10)
To enter the List Mode, press the DN and SEL keys
simultaneously. From this display, pressing the UP and DN keys
simultaneously will move the system from the list mode to the
function shown at the cursor. Note that the cursor is moved by
the UP and DN keys.
3.3 List Mode (Function Mode)
DN
SELECT
CH CH CLEARUP
DN
SELECT
CH CH CLEARUP
Press simultaneously
to access function at
cursor
Press UP and DN keys
simultaneously to exit the
System Set-Up Mode
To Model Name function
To Info Display function
Function select
(select model/copy)
Model selection
(1-10)
Press UP and Select keys
simultaneously to access the
System Mode info display
Press to select either of
two Function List screens
Inactive while in List Mode screen
ACRO 29
3.5 Copy Select Function (System Set-Up Mode)
The Copy Select Function enables you to copy all of the settings
of your current model to another memory (model number) within
the same transmitter. This is very useful when setting up one
aircraft several different ways.
model names
(if dot is shown, model
name is blank)
existing model
number
model number to be
transferred to.
3.6 Model Names (System Set-Up Mode)
This function is used to input model names individually. Each
model’s name is displayed in the normal screen automatically.
when that model is selected. To avoid confusing models,
inputing model names is recommended. You can input a
maximum of 8 characters for each model name.
In the System Set-Up Mode, select the Model Name Function
using the UP or DN key. Once selected, simultaneously press the
UP and DN keys to access.
model number
modulation
model type
letter position being
inputed
DN
SELECT
CH CH CLEARUP
Press UP and DN keys
simultaneously to exit the
System Set-Up Mode
Press the Select key to
access the copy function
in Model Select mode
To Model Name function
To Spoiler Channel input
selection function
Function select
(select model/copy)
Model selection —
use to select model
to be copied to
Activate copy
function
DN
SELECT
CH CH CLEARUP
Press UP and DN keys
simultaneously to exit the
System Set-Up Mode
Press the DN and Select keys
simultaneously to access the
System Mode info display
(8 characters)
To Model Type Selection
function
To Model Select/Copy
function
Press to change
input letter at arrow
Press to change
input letter arrow
position
Changes input letter
to blank space only
where arrow is
located
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