Horizon Hobby JR DSM 12X Owner's manual

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INSTRUCTION AND
PROGRAMMING MANUAL
12-CHANNEL COMPUTER RADIO
SYSTEM WITH SPEKTRUM 2.4GHz DSM
TECHNOLOGY

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Table of Contents
Using the Manual..........................................................................................................................................I-11
Section 1: Transmitter and Receiver Features and Specifications.................................................................I-12
JR 12X Transmitter ...................................................................................................................................I-12
Features.....................................................................................................................................................I-12
Specifications............................................................................................................................................I-12
Flash Memory ............................................................................................................................................... I-12
Battery Alarm and Display ............................................................................................................................I-12
JR R1221 Receiver....................................................................................................................................I-13
Features.....................................................................................................................................................I-13
Specifications............................................................................................................................................I-13
Charging .......................................................................................................................................................I-14
Transmitter/Receiver .................................................................................................................................I-14
JR Transmitter Charging ...........................................................................................................................I-14
Using the Included Charger.......................................................................................................................I-14
Control Stick Tension Adjustment.................................................................................................................I-15
Advanced Digital Trims .................................................................................................................................I-15
Control Stick Length .....................................................................................................................................I-15
Neck Strap Attachment .................................................................................................................................I-15
Installing the Receiver ..................................................................................................................................I-16
Installing the JR R1221.............................................................................................................................I-16
Binding..........................................................................................................................................................I-17
How to Bind ..............................................................................................................................................I-17
ModelMatch..................................................................................................................................................I-18
Failsafe Functions .........................................................................................................................................I-18
SmartSafe .....................................................................................................................................................I-19
Receiver Power Only .................................................................................................................................I-19
After Connection........................................................................................................................................I-19
Failsafe for JR/Spektrum...........................................................................................................................I-19
Receiver Power Only .................................................................................................................................I-19
After Connection........................................................................................................................................I-20
Programming SmartSafe...........................................................................................................................I-20
Programming Preset Failsafe for JR/Spektrum.........................................................................................I-20
Range Testing ...............................................................................................................................................I-21
Range Testing............................................................................................................................................I-21
Advanced Range Testing Using a Flight Log .............................................................................................I-21
Advanced Range Testing ...........................................................................................................................I-22
Flight Log—Optional for JR R1221 Receiver................................................................................................I-23
Using the Flight Log..................................................................................................................................I-23
Receiver Power System Requirements.........................................................................................................I-24
Recommended Power System Guidelines ....................................................................................................I-24
Tips On Using 2.4GHz Systems....................................................................................................................I-25
Airplane – Acro Mode ....................................................................................................................................A-1
Transmitter Identification ACRO.....................................................................................................................A-2
System Mode.................................................................................................................................................A-4
To Enter System Mode ...............................................................................................................................A-4
Function Mode...............................................................................................................................................A-5
To Enter Function Mode .............................................................................................................................A-5
Function Mode List ........................................................................................................................................A-5
System Mode.................................................................................................................................................A-6
Accessing the System Mode ......................................................................................................................A-6

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84: MODEL SELECT- (Copy Function) ...........................................................................................................A-6
To Select a Model Memory.........................................................................................................................A-7
Model Copy ................................................................................................................................................A-7
To Copy a Model to Another Internal Memory ...........................................................................................A-7
81: Model Name ............................................................................................................................................A-8
To Name a Model .......................................................................................................................................A-8
28: Model Reset.............................................................................................................................................A-9
To Reset a Model Memory .........................................................................................................................A-9
89: Type Select ............................................................................................................................................A-10
To Select a Model Type ............................................................................................................................A-10
85: Modulation - (12X MV System only) .....................................................................................................A-11
To Program a Modulation Type ................................................................................................................A-11
93: Frequency Select- (12X MV system only)..............................................................................................A-12
To Select a Frequency ..............................................................................................................................A-12
83: Trim System...........................................................................................................................................A-13
LST Trim...................................................................................................................................................A-13
To Adjust the Trim Rates:.........................................................................................................................A-14
To Select the LST Trim Function ..............................................................................................................A-14
91: Stick Position Switch.............................................................................................................................A-15
To Program a Stick Position Switch.........................................................................................................A-15
92: Flight Mode Name..................................................................................................................................A-16
To Program a Flight Mode Name..............................................................................................................A-16
86: Transfer..................................................................................................................................................A-17
Preparing the 12X to Receive a Model Transfer .......................................................................................A-17
Preparing the 12X to Send a Model Transfer ...........................................................................................A-18
97: Warning .................................................................................................................................................A-19
To Program a Warning .............................................................................................................................A-19
98: Settings..................................................................................................................................................A-20
To Change Transmitter Settings ...............................................................................................................A-20
17: Device Select .........................................................................................................................................A-21
Flight Modes.............................................................................................................................................A-21
To Activate Flight Modes ..........................................................................................................................A-22
Throttle Hold ............................................................................................................................................A-23
To Assign Throttle Hold to a Switch.........................................................................................................A-23
Flap Trim ..................................................................................................................................................A-24
Trim..........................................................................................................................................................A-25
Switch Assignments.................................................................................................................................A-26
To Change One or More Switch Assignments: .........................................................................................A-26
Activate/Inhibit Channels..........................................................................................................................A-26
22: Wing Type..............................................................................................................................................A-27
Wing Types...............................................................................................................................................A-27
V-Tail Mix .................................................................................................................................................A-27
Dual Flight Controls..................................................................................................................................A-27
Dual Control Functions.............................................................................................................................A-27
Twin Engine Control .................................................................................................................................A-27
Wing Type ................................................................................................................................................A-28
To Program a Wing Type..........................................................................................................................A-28
V-Tail ........................................................................................................................................................A-29
Dual Channels ..........................................................................................................................................A-29
Twin Engine..............................................................................................................................................A-30
Function Mode .........................................................................................................................................A-30
To Enter the Function Mode List ..............................................................................................................A-30

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11: Servo Reversing ....................................................................................................................................A-31
To Program Servo Reverse ......................................................................................................................A-31
12: Travel Adjust ..........................................................................................................................................A-31
To Program Travel Adjust Values .............................................................................................................A-31
13: Dual Rate and Exponential.....................................................................................................................A-32
To Program Dual Rate and Exponential Values ........................................................................................A-32
Assigning Dual and Expo Rates to Flight Modes......................................................................................A-32
To Assign D/R and Expo Values to Flight Modes .....................................................................................A-32
15: Sub Trim ................................................................................................................................................A-33
To Program Sub Trim Values ...................................................................................................................A-33
16: Throttle Hold..........................................................................................................................................A-33
To Activate Throttle Hold:.........................................................................................................................A-33
18: Throttle Curves ......................................................................................................................................A-34
To Program a Throttle Curve....................................................................................................................A-34
24: Servo Speed ..........................................................................................................................................A-35
To Adjust Servo Speed.............................................................................................................................A-35
31: Snap Roll ...............................................................................................................................................A-36
If the Snap Roll Function Is To Be Used...................................................................................................A-36
32: Differential .............................................................................................................................................A-37
To Use the Aileron Differential Function ...................................................................................................A-37
33: Balance ..................................................................................................................................................A-38
To Program the Balance Function ............................................................................................................A-38
44: Gyro Sensor...........................................................................................................................................A-39
Gyro Connections.....................................................................................................................................A-39
Gyro Gain .................................................................................................................................................A-39
To Access the Gyro Sensor ......................................................................................................................A-39
45: Governer................................................................................................................................................A-40
To Activate the Governor Screen..............................................................................................................A-40
To Access the Governor Screen ...............................................................................................................A-40
62: Aileron to Rudder ..................................................................................................................................A-41
To Program Aileron-to-Rudder Mixing .....................................................................................................A-41
63: Elevator to Flap......................................................................................................................................A-42
To Program Elevator-to-Flap Mixing.........................................................................................................A-42
64: Rudder to Aileron/Elevator Mix..............................................................................................................A-43
To Program the Rudder-to-Aileron Mix....................................................................................................A-43
66: Flap System ...........................................................................................................................................A-44
To Program the Flap System....................................................................................................................A-44
Flap...........................................................................................................................................................A-45
ELEV – Elevator Compensation ................................................................................................................A-45
Flight Modes.............................................................................................................................................A-45
Delay ........................................................................................................................................................A-45
51 thru 58: Programmable Mixers...............................................................................................................A-46
Standard Programmable Mixer - (Std. Prog Mixer) .................................................................................A-46
Master Channel - (Std. Prog Mixer) .........................................................................................................A-47
Slave Channel - (Std. Prog Mixer)............................................................................................................A-48
Switch Position ........................................................................................................................................A-48
Offset........................................................................................................................................................A-49
Mix Values................................................................................................................................................A-49
CLR Button - (Std. Prog Mixer)................................................................................................................A-50
To Inhibit a Mix ........................................................................................................................................A-50
Multi-Point Programmable Mixer.............................................................................................................A-50
Master Channel ........................................................................................................................................A-50

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Slave Channel...........................................................................................................................................A-51
Point Names/Numbers .............................................................................................................................A-51
Current Point Setting................................................................................................................................A-51
Vertical Line .............................................................................................................................................A-51
Multi-Point Programmable Mixer.............................................................................................................A-52
Graph .......................................................................................................................................................A-52
Points That Can Be Added and Adjusted..................................................................................................A-52
Exponential...............................................................................................................................................A-52
Slave Channel Position.............................................................................................................................A-52
Master Channel Position ..........................................................................................................................A-52
Switch Select............................................................................................................................................A-53
CLR Button...............................................................................................................................................A-53
LIST Button ..............................................................................................................................................A-53
ENT Button...............................................................................................................................................A-53
TO Inhibit a Mixer (turn it off entirely) .....................................................................................................A-53
67: Aileron-to-Flap Mix ................................................................................................................................A-54
68: Pitch Curve ............................................................................................................................................A-55
Point Names/Numbers .............................................................................................................................A-55
Current Point Setting................................................................................................................................A-55
Vertical Line .............................................................................................................................................A-56
Graph .......................................................................................................................................................A-56
Points That Can Be Added and Adjusted..................................................................................................A-56
Exponential...............................................................................................................................................A-56
Pitch Channel Position .............................................................................................................................A-56
Throttle Channel Position.........................................................................................................................A-56
Switch Select............................................................................................................................................A-57
CLR Button...............................................................................................................................................A-57
LIST Button ..............................................................................................................................................A-57
ENT Button...............................................................................................................................................A-57
75: Monitor..................................................................................................................................................A-58
76: Mix Monitor ...........................................................................................................................................A-58
78: Trainer....................................................................................................................................................A-59
12X Used as Master (Instructor)..............................................................................................................A-59
12X Used as Slave (Student) ...................................................................................................................A-59
87: Timer .....................................................................................................................................................A-60
12X Helicopter Mode .....................................................................................................................................H-1
Introduction................................................................................................................................................H-1
Heli Programming ......................................................................................................................................H-2
System Mode.................................................................................................................................................H-4
To Enter System Mode ...............................................................................................................................H-4
System Mode List..........................................................................................................................................H-4
FUNCTION MODE...........................................................................................................................................H-5
To Enter Function Mode .............................................................................................................................H-5
Function Mode List ........................................................................................................................................H-5
System Mode.................................................................................................................................................H-6
Accessing the System Mode ......................................................................................................................H-6
84: Model Select- (Copy Function) ................................................................................................................H-6
To Select a Model Memory.........................................................................................................................H-6
Model Copy ................................................................................................................................................H-7
To Copy a Model to Another Internal Memory ...........................................................................................H-7

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81: Model Name ............................................................................................................................................H-8
To Name a Model .......................................................................................................................................H-8
28: Model Reset.............................................................................................................................................H-8
To Reset a Model Memory .........................................................................................................................H-8
89: Type Select ..............................................................................................................................................H-9
To Select a Model Type ..............................................................................................................................H-9
85: Modulation - (12X MV System only) .....................................................................................................H-10
To Program a Modulation Type ................................................................................................................H-10
93: Frequency Select- (12X MV system only)..............................................................................................H-11
To Select a Frequency ..............................................................................................................................H-11
83: Trim System...........................................................................................................................................H-12
LST Trim...................................................................................................................................................H-12
To Adjust the Trim Rates..........................................................................................................................H-13
To Select the LST Trim Function ..............................................................................................................H-13
91: Stick Position Switch.............................................................................................................................H-14
To Program a Stick Position Switch.........................................................................................................H-14
92: Flight Mode Name..................................................................................................................................H-15
To Program a Flight Mode Name..............................................................................................................H-15
86: Transfer..................................................................................................................................................H-16
Preparing the 12X to Receive a Model Transfer .......................................................................................H-16
Preparing the 12X to Send a Model Transfer ...........................................................................................H-17
97: Warning .................................................................................................................................................H-18
To Program a Warning .............................................................................................................................H-18
98: Settings..................................................................................................................................................H-19
To Change Transmitter Settings ...............................................................................................................H-19
17: Device Select .........................................................................................................................................H-20
Assigning the Flight Mode Switch............................................................................................................H-20
To Assign the Flight Mode to a Switch.....................................................................................................H-20
Activating Extra Flight Modes 3 and 4......................................................................................................H-21
To Activate 2 Additional Flight Modes (Flight Modes 3 and 4).................................................................H-21
Assigning the Throttle Hold Switch..........................................................................................................H-21
To Assign the Throttle Hold to a Switch...................................................................................................H-22
Stunt Trim....................................................................................................................................................H-22
Hover Analog............................................................................................................................................H-23
Switch Assignments.................................................................................................................................H-23
To Change One or More Switch Assignments ..........................................................................................H-24
Assigning/Activating Governor, Gyro and Pitch 2 Functions ....................................................................H-24
If the Governor, Gyro or Pitch 2 Functions Are To Be Used .....................................................................H-24
Deactivating Channels ..............................................................................................................................H-25
34: Swashplate Type....................................................................................................................................H-26
To Select a Swashplate Type ....................................................................................................................H-26
Function Mode .........................................................................................................................................H-27
To Enter the Function Mode List ..............................................................................................................H-27
11: Servo Reversing ....................................................................................................................................H-27
To Program Servo Reverse ......................................................................................................................H-27
12: Travel Adjust ..........................................................................................................................................H-28
To Program Travel Adjust Values .............................................................................................................H-28
13: Dual Rate and Exponential.....................................................................................................................H-29
To Program Dual Rate and Exponential Functions ...................................................................................H-29
AUTO Function .........................................................................................................................................H-30
15: Sub Trim ................................................................................................................................................H-30
To Program Sub Trim Values ...................................................................................................................H-30

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16: Throttle Hold..........................................................................................................................................H-31
Accessing the Throttle Hold Function.......................................................................................................H-31
Stick Auto.................................................................................................................................................H-31
To Activate the Stick Auto Function..........................................................................................................H-31
Hold Delay................................................................................................................................................H-31
To Activate the Hold Delay........................................................................................................................H-31
18: Throttle Curves ......................................................................................................................................H-32
Accessing the Throttle Curve Function.....................................................................................................H-32
Exponential...............................................................................................................................................H-33
Trim (Mechanical Trim Lever) ..................................................................................................................H-33
Hovering Throttle .....................................................................................................................................H-33
24: Servo Speed ..........................................................................................................................................H-34
To Adjust Servo Speed.............................................................................................................................H-34
42: Mix to Throttle .......................................................................................................................................H-35
Programming the Cyclic-to-Throttle Function ..........................................................................................H-35
Selecting the Desired Flight Modes for Cyclic-to-Throttle Mixing ............................................................H-35
44: Gyro Sensor...........................................................................................................................................H-36
Accessing the Gyro Gain Function ...........................................................................................................H-36
45: Governor................................................................................................................................................H-37
Accessing the Governor Function.............................................................................................................H-37
47: Tail Curves- (Use Only with Non-Heading Hold Gyros) .........................................................................H-38
Accessing the Tail Curve Function............................................................................................................H-38
Exponential...............................................................................................................................................H-38
61: Dual Pitch ..............................................................................................................................................H-39
65: Swashplate Mix......................................................................................................................................H-40
Aileron, Elevator and Pitch Authority........................................................................................................H-40
Aileron to Elevator/ Elevator to Aileron Mix..............................................................................................H-40
3D Electronic Cyclic Ring.........................................................................................................................H-40
Exponential Function ................................................................................................................................H-40
Elevator-to-Pitch Canceller .......................................................................................................................H-41
Accessing the Swashplate Mixing Function .............................................................................................H-41
68: Pitch Curves ..........................................................................................................................................H-42
Accessing the Pitch Curve Function.........................................................................................................H-42
Exponential...............................................................................................................................................H-43
Hovering Pitch..........................................................................................................................................H-43
51 thru 58: Programmable Mixers...............................................................................................................H-44
Standard Programmable Mixer - (Std. Prog Mixer) .................................................................................H-44
Master Channel - (Std. Prog Mixer) .........................................................................................................H-45
Slave Channel - (Std. Prog Mixer)............................................................................................................H-46
Switch Position ........................................................................................................................................H-46
Offset........................................................................................................................................................H-47
Mix Values................................................................................................................................................H-47
CLR Button - (Std. Prog Mixer)................................................................................................................H-48
To Inhibit a Mix ........................................................................................................................................H-48
Multi-Point Programmable Mixer.............................................................................................................H-48
Master Channel ........................................................................................................................................H-49
Slave Channel...........................................................................................................................................H-49
Point Names/Numbers .............................................................................................................................H-49
Current Point Setting................................................................................................................................H-49
Vertical Line .............................................................................................................................................H-50
Multi-Point Programmable Mixer.............................................................................................................H-50
Graph .......................................................................................................................................................H-50

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Points that Can Be Added and Adjusted...................................................................................................H-50
Exponential...............................................................................................................................................H-50
Slave Channel Position.............................................................................................................................H-50
Master Channel Position ..........................................................................................................................H-51
Switch Select............................................................................................................................................H-51
CLR Button...............................................................................................................................................H-51
LIST Button ..............................................................................................................................................H-51
ENT Button...............................................................................................................................................H-51
To Inhibit a Mixer (Turn it off entirely) .....................................................................................................H-51
75: Monitor..................................................................................................................................................H-52
76: Mix Monitor ...........................................................................................................................................H-52
78: Trainer....................................................................................................................................................H-53
12X Used as Master (Instructor)..............................................................................................................H-53
12X Used as Slave (Student) ...................................................................................................................H-53
87: Timer .....................................................................................................................................................H-54
12X Sailplane Mode.......................................................................................................................................S-1
Introduction................................................................................................................................................S-1
Transmitter Identification- Sailplane...........................................................................................................S-2
Programming a Sailplane...............................................................................................................................S-4
System Mode.................................................................................................................................................S-4
To Enter System Mode ...............................................................................................................................S-4
Function Mode...............................................................................................................................................S-5
To Enter Function Mode .............................................................................................................................S-5
System Mode.................................................................................................................................................S-5
Accessing the System Menu ......................................................................................................................S-5
84: Model Select- (Copy Function) ................................................................................................................S-6
To Select a Model Memory.........................................................................................................................S-6
Model Copy ................................................................................................................................................S-7
To Copy a Model to Another Internal Memory ...........................................................................................S-7
81: Model Name ............................................................................................................................................S-8
To Name a Model .......................................................................................................................................S-8
28: Model Reset.............................................................................................................................................S-9
To Reset a Model Memory .........................................................................................................................S-9
89: Type Select ..............................................................................................................................................S-9
To Select a Model Type ..............................................................................................................................S-9
85: Modulation - (12X MV System only) .....................................................................................................S-10
To Program a Modulation Type ................................................................................................................S-10
93: Frequency Select- (12X MV system only)..............................................................................................S-11
To Select a Frequency ..............................................................................................................................S-11
83: Trim System...........................................................................................................................................S-12
LST Trim...................................................................................................................................................S-12
To Adjust the Trim Rates..........................................................................................................................S-13
To Select the LST Trim Function ..............................................................................................................S-13
91: Stick Position Switch.............................................................................................................................S-14
To Program a Stick Position Switch.........................................................................................................S-14
92: Flight Mode Name..................................................................................................................................S-15
To Program a Flight Mode Name..............................................................................................................S-15
86: Transfer..................................................................................................................................................S-16
Preparing the 12X to Receive a Model Transfer .......................................................................................S-16
Preparing the 12X to Send a Model Transfer ...........................................................................................S-17

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97: Warning .................................................................................................................................................S-18
To Program a Warning .............................................................................................................................S-18
98: Settings..................................................................................................................................................S-19
To Change Transmitter Settings ...............................................................................................................S-19
17: Device Select .........................................................................................................................................S-19
Flight Modes.............................................................................................................................................S-20
Activating and Assigning Primary Flight Modes.......................................................................................S-21
Activating and Assigning Additional Flight Modes ...................................................................................S-21
Aileron and Rudder Common Trims.........................................................................................................S-21
Motor Function.........................................................................................................................................S-22
Flap and AUX Functions ...........................................................................................................................S-22
Activating / Inhibiting Channels................................................................................................................S-22
22: Wing Type..............................................................................................................................................S-23
Function Mode .........................................................................................................................................S-23
To Enter the Function Mode List ..............................................................................................................S-23
11: Servo Reversing ....................................................................................................................................S-24
To Program Servo Reverse ......................................................................................................................S-24
12: Travel Adjust ..........................................................................................................................................S-24
To program Travel Adjust values:.............................................................................................................S-24
13: Dual Rate and Exponential.....................................................................................................................S-25
To Program Dual Rate and Exponential Functions ...................................................................................S-25
AUTO function..........................................................................................................................................S-25
15: Sub Trim ................................................................................................................................................S-26
To Program Sub Trim Values ...................................................................................................................S-26
Motor Hold...............................................................................................................................................S-26
To Access Motor Hold in the Function List ..............................................................................................S-26
21: Flaperon Mix..........................................................................................................................................S-27
To Access Flaperon Mix............................................................................................................................S-27
24: Servo Speed ..........................................................................................................................................S-28
To Adjust Servo Speed.............................................................................................................................S-28
25: Camber System .....................................................................................................................................S-29
To Access the Camber System.................................................................................................................S-29
32: Differential .............................................................................................................................................S-30
To Use the Aileron Differential Function ...................................................................................................S-30
33: Balance ..................................................................................................................................................S-31
To Program the Balance Function ............................................................................................................S-31
44: Gyro Sensor...........................................................................................................................................S-32
To Access the Gyro Sensor ......................................................................................................................S-32
46: Rudder-to-Spoiler Mix ...........................................................................................................................S-32
To Access Rudder-to-Spoiler Mix.............................................................................................................S-32
62: Aileron-to-Rudder Mix ...........................................................................................................................S-33
To Access Aileron-to-Rudder Mix.............................................................................................................S-33
63: Elevator-to-Flap Mix...............................................................................................................................S-34
To Access Elevator-to-Flap Mix ................................................................................................................S-34
69: Flap Rate................................................................................................................................................S-35
To Access the Flap Rate Function.............................................................................................................S-35
71: Brake System.........................................................................................................................................S-36
To Access the Brake System ....................................................................................................................S-36
51 thru 58: Programmable Mixers...............................................................................................................S-37
Additionally There are Two Options for Master Channels.........................................................................S-37
Standard Programmable Mixer - (Std. Prog Mixer) .................................................................................S-37

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Master Channel - (Std. Prog Mixer) .........................................................................................................S-38
Slave Channel - (Std. Prog Mixer)............................................................................................................S-39
Switch Position ........................................................................................................................................S-39
Offset........................................................................................................................................................S-39
Mix Values................................................................................................................................................S-40
LR Button - (Std. Prog Mixer)..................................................................................................................S-40
To Inhibit a Mix ........................................................................................................................................S-40
Multi-Point Programmable Mixer.............................................................................................................S-41
Master Channel ........................................................................................................................................S-41
Slave Channel...........................................................................................................................................S-41
Point Names/Numbers .............................................................................................................................S-41
Current Point Setting................................................................................................................................S-42
Vertical Line .............................................................................................................................................S-42
Multi-Point Programmable Mixer.............................................................................................................S-42
Graph .......................................................................................................................................................S-42
Points That Can Be Added and Adjusted..................................................................................................S-42
Exponential...............................................................................................................................................S-42
Slave Channel Position.............................................................................................................................S-43
Master Channel Position ..........................................................................................................................S-43
Switch Select............................................................................................................................................S-43
CLR Button...............................................................................................................................................S-43
LIST Button ..............................................................................................................................................S-43
ENT Button...............................................................................................................................................S-43
To Inhibit a Mixer (Turn it off completely)................................................................................................S-43
75: Monitor..................................................................................................................................................S-44
76: Mix Monitor ...........................................................................................................................................S-44
78: Trainer....................................................................................................................................................S-45
12X Used as Master (Instructor)..............................................................................................................S-45
12X Used as Slave (Student) ...................................................................................................................S-45
87: Timer .....................................................................................................................................................S-46
General Information......................................................................................................................................W-1
FCC Information ........................................................................................................................................W-1
Daily Flight Checks....................................................................................................................................W-1
Servo Precautions .....................................................................................................................................W-1
General Notes............................................................................................................................................W-1
Safety Do’s and Don’ts for Pilots ..............................................................................................................W-2
Federal Aviation Administration ....................................................................................................................W-2
Purpose.....................................................................................................................................................W-2
Background ...............................................................................................................................................W-2
Operating Standards..................................................................................................................................W-2
Information Provided By ...........................................................................................................................W-2
Warranty Information....................................................................................................................................W-3
Three Year Warranty Period ......................................................................................................................W-3
Limited Warranty.......................................................................................................................................W-3
Damage Limits ..........................................................................................................................................W-3
Safety Precautions ....................................................................................................................................W-3
Questions, Assistance, and Repairs ..........................................................................................................W-3
Inspection or Repairs................................................................................................................................W-4
Warranty Inspection and Repairs..............................................................................................................W-4
Non-Warranty Repairs...............................................................................................................................W-4

I-11
The 12X offers sophisticated programming features for three model types: airplanes, helicopters and sailplanes. This manual is
divided into four sections. The first section, pages I-14 through I-27, includes common transmitter features and specifications plus
overall operational information (i.e. charging batteries, binding, range checking and Frequently Asked Questions) sections that are
common to all model types. The remaining three sections, pages A-1 through S-41, include instructions for using model-specific
programming for airplane, helicopter and sailplane functions. An explanation of each programming function is provided, followed by
illustrations of its corresponding display and instructions on how to access and adjust the function.
Using the Manual

I-12
JR’s 12X offers airplane, helicopter and sailplane pilots
the highest level of sophisticated programming features
combined with the benefits of Spektrum’s 2.4GHz DSM®
radio link technology. DSM (Digital Spektrum Modulation)
technology offers a far superior RF link over narrow band
systems, providing a higher level of confidence and safety.
Now with even the most sophisticated models you’ll no longer
have to wait for an open frequency, worry about someone
• Backlit screen
• Ergonomic magnesium case
• Digital 3 + 1 trims (3 digital + 1 analog [throttle] trim)
• Newly designed ball bearing gimbals
• The choice of a fully integrated 2.4GHz Spektrum™system
or Module-based system that allows the easy band switch
from 2.4GHz Spektrum technology to 72MHz
• The highest level of sophisticated programming for three
model types: Airplane, Helicopter, Sailplane
Section 1: Transmitter and Receiver Features and Specifications
Flash Memory
All preprogrammed data is protected by a flash memory that
protects stored programming should the main transmitter
battery ever fail or need replacing.
When the transmitter voltage drops below 9.0 volts, the display
flashes “BATT LOW” and an alarm sounds.
If you are flying when this occurs, land immediately.
Battery Alarm and Display
Features
• Rolling Selector input
• Flight Mode naming
• 50-model memory
• Patented DuaLink®Technology (2.4GHz system only)
• ModelMatch™ (2.4GHz system only)
• ServoSync™
unintentionally powering up on the same frequency or have
to plan a frequency-based flight matrix for competition. And
for response-critical aircraft like 3D helicopters and airplanes,
latency (the time it takes for a stick input to translate to a servo
output) is significantly reduced, providing a more responsive,
precise connection to your model.
Specifications
• Model Number: (JRP1200 12X 2.4/JRP1210 12X MV)
• Number of Channels:12
• Modulation Type: Direct Sequence Spread Spectrum DSM2/
DSM1 protocol
Note: 12X MV also operates in PPM and S-PCM with
included 72Mhz module. (A-PCM not supported in the US
by Horizon Hobby - Japan market only)
• Band: 2.400–2.483GHz
• Spectral Capacity: 40 simultaneous systems
• Transmitter Current: 180mA/ DSM2;
280mA/ DSM1; 200mA/PCM/
• Resolution: 2048
JR 12X Transmitter

I-13
The R1221 receiver combines one internal with three remote
receivers, offering superior path diversity. The radio system
simultaneously transmits on two frequencies, creating up to
four RF paths on two different 2.4GHz channels. This multi path
redundancy, plus the fact that each of the 4 receivers are located
in different locations throughout the aircraft, exposes each to
a different RF environment creating a superior RF link in all
conditions. The JR R1221 allows an optional Flight Log data
recorder (JRPA145) to be used. The flight log can be plugged
into the data port of the receiver to provide RF link data of the
previous flight, allowing the confirmation of the operational
performance of the system receiver antenna.
JR R1221 Receiver
Features
• 12 channels
• 1 internal receiver
• 3 remote receivers
• Patented MultiLink™ technology
• Two Types of Failsafe: SmartSafe™ and preprogrammed
failsafe
Specifications
• Number of Channels: 12
• Modulation: DSM2
• Band: 2.400–2.4835GHz
• Dimensions (WxLxH): 1.48 x 2.1 x .628 in
• Weight: Main .7 oz (20 g) Remote 3 g/.2 oz each
• Current: 70mA
• Voltage Range: 3.5 to 10V
• Resolution: 2048
Note: The 12X includes a JR1221 12-channel receiver.
The 12X is also compatible will all current JR and
Spektrum DSM aircraft receivers including:
• AR6000 6-channel Parkflyer receiver
• AR6100 6-channel 3.5-gram Parkflyer receiver
• AR6100e 6-channel 3.5-gram end pin
Parkflyer receiver
• AR6200 6-channel full range receiver
• AR6300 6-channel 2-gram Nanolite slow and micro
flyer receiver
• Instant QuickConnect™ (w/brown-out detection) should a
power interruption occur
• Flight Log compatible
Compatible Receivers
• AR7000 7-channel full range receiver
• AR9000 9-channel full range receiver
• AR9100 9-channel PowerSafe™ full range receiver
• R921 9-channel full range receiver
• R922 9-channel PowerSafe full range receiver
• R1222 12-channel PowerSafe full range receiver
Important: When using the 12X with Parkflyer receivers
(the AR6000, AR6100, AR6100e, and AR6300), it’s
imperative that these receivers only be flown in parkflyer-
type aircraft (small electric airplanes or mini and micro
helicopters). Flying receivers designed for parkflyers in
larger aircraft could cause a loss of control.

I-14
Transmitter/Receiver
Note: It is imperative that you fully charge both the
transmitter and the receiver battery packs prior to each
flying session and that you check the condition of the
receiver battery between each flight using a reliable battery
tester with a built-in load. The included wall charger
charges at a 250mA rate. In order to fully charge the
included batteries, it’s necessary to leave the charger and
batteries hooked up to the included wall charger for 8–10
hours.
An optional fast charger can be used to charge both the
transmitter and receiver batteries, however, it’s imperative that
the batteries are properly charged and the charge condition
be checked prior to flight. “False Peaking” is a common
occurrence with many fast chargers/ batteries, giving an
indication that the battery is fully charged when in fact the
battery is only partially charged. False Peaking can lead to
disastrous results and it is the pilot’s responsibility to verify the
charge condition of the batteries before every flight. (Also see
Receiver Power Requirements page I-26.)
JR Transmitter Charging
The center pin on all JR®transmitters 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 may not apply in this instance. You
must make sure that the center pin of your JR transmitter is
always connected to the negative pole for correct polarity.
Note: When using a fast charger to charge the transmitter
battery, do not exceed 1.5 amps (or 1500mA) charge rate
or damage to the transmitter or battery can occur.
Using the Included 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
the polarity compatibility with your radio. Seek expert advice to
avoid possible damage.
During the charging operation, the charger’s temperature is
slightly elevated.
Charging
Charger Pigtail for Transmitter
Transmitter Charge Jack Polarity
BLACK TO POSITIVE
BLACK W/WHITE STRIPE TO NEGATIVE
-+

I-15
Stick tension adjustments are accessible through covers that
are located on the back of the transmitter (see photo). Carefully
pull back the cover or remove the grip to access the gimbals’
tension screws and then, using a small Phillips screwdriver,
adjust each gimbal’s tension screw for the desired tension
(counterclockwise to loosen stick tension; clockwise to tighten
stick tension).
Advanced Digital Trims
Control Stick Length
Neck Strap Attachment
Control Stick Tension Adjustment
The 12X features Advanced digital trims. On 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 12X Aileron, Elevator and Rudder trim levers and
the right and left side levers feature an audible center trim beep.
This is helpful in determining the trim lever’s center position
during flight. In addition, the frequency of each trim step
changes from full right/up to full left/down, allowing the pilot to
be aware of the general trim position audibly without looking at
the transmitter.
By using the Trim System Function Code 83 located in the
System Mode, the amount of travel per each trim step can be
adjusted as needed to match your specific application.
Please note that when the 12X transmitter is turned off, the trim
values are stored in memory and are recalled when the system
is turned back on.
Use a 2mm Allen wrench to unlock the setscrew to adjust
the stick length. Turn the wrench counterclockwise to loosen
the screw. Then, turn the stick clockwise to shorten or
counterclockwise to lengthen the overall stick length. After the
control stick length has been adjusted to suit your flying style,
tighten the 2mm setscrew. If you desire longer sticks, JR offers
a stick (JRPA047) that is approximately one inch longer than
standard, and has various length anodized aluminum stick ends
available (JRPA040-JRPA045). These stick ends are crafted
from bar stock aluminum, and are available at your local JR
dealer.
An eyelet is provided on the face of the 12X transmitter that
allows you to connect a Neck Strap.
LOOSEN
TIGHTEN
SETSCREW

I-16
Installing the JR R1221
The JR R1221 incorporates a single internal receiver and three
remote receivers offering the security of four simultaneous RF
links for the ultimate in multi-path RF security. One internal
receiver is located on the main PC board, while 2 remote
receivers must be plugged into one of the antenna ports
in order for the system to operate. A third remote receiver
(included) can be plugged into the remaining remote antenna
port giving a total of four operational receivers. By locating
these receivers in different locations throughout the aircraft,
each receiver is exposed to its own RF environment, greatly
improving path diversity (the ability of the receiver to see the
signal in all conditions).
Note: The JR R1221 requires that at least two remote
receivers be used.
Install the main receiver using the same method you would use
to install a conventional receiver in your aircraft. Typically wrap
the main receiver in protective foam and fasten it in place using
rubber bands or Velcro straps. Alternately in electric models or
in jets (low vibration), it’s acceptable to use thick double-sided
foam tape to fasten the main receiver in place.
Mounting the remote receiver(s) in a different location(s),
from the primary receiver, gives tremendous improvements
in path diversity. Essentially each receiver sees a different RF
environment and this is the key to maintaining a solid RF link,
even in aircraft that have substantial conductive materials (i.e.
turbine engines with metal tail pipes, carbon fiber, tuned pipes,
etc.) which can attenuate the signal.
Using double-sided foam tape (servo tape), mount the remote
receiver(s) keeping the remote antenna(s) at least 2” away
from the primary antenna. Ideally the antennas will be oriented
perpendicular to each other; however, we’ve found this to not
be critical. 6”, 9”, 12”, 24”, and 36” leads are available and in
sophisticated aircraft, we’ve found it best to mount the remote
receivers in different parts of the aircraft keeping the remote
antennas as far away as practical from any conductive materials.
A typical installation would include the main receiver mounted
in the conventional location in the fuselage and the remote
antennas in the nose (jets) in the top turtle deck and even in the
tail. The optimum location is as far away from any conductive
materials as practical.
In helicopters, there is generally enough room on the servo tray
to achieve the necessary separation. If necessary a mount can
be made using clear plastic to mount the external antenna.
Other important installation tips:
1. 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 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.
2. The servo arms 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.
3. 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.
Installing the Receiver

I-17
Binding is necessary to program the receiver to the transmitter
so that the receiver will only recognize that specific transmitter,
ignoring signals from any other sources. If the receiver is not
bound to the transmitter, the system will not operate. During
binding, the servo’s failsafe positions are stored.
The following sequence describes the binding procedure for the
JR1221, however, all JR and Spektrum DSM aircraft receivers
are bound in the same way.
1. With the system hooked up as shown, insert the bind plug
in the charge plug receptacle. The switch must be a 3-wire
type switch (JRPA001 or JRPA004) to enter the bind mode
through the switch. If a 3-wire switch is not available, install
the male bind plug directly into the receiver bind/data
receptacle and power the receiver through any other open
port to enter the bind mode.
REMOVE BEFORE USE
2. Turn on the receiver switch. Note that the LED’s on all
receivers should be flashing, indicating that the receiver is
ready to bind.
Binding
3. Establish the desired failsafe stick positions: normally low
throttle and flight controls neutral.
4. Press and hold the bind button on the back of the transmitter
while turning on the power switch. The bind button should
flash and within a few seconds the system should connect.
The LED’s on the receivers should go solid, indicating the
system has connected.
5. Remove the bind plug from the receiver or switch harness
and store it in a convenient place.
6. After you’ve programmed your model, it’s important to
rebind the system so the true low throttle and neutral control
surface positions are programmed.
Note: To bind an aircraft with an electronic speed
controller that powers the receiver through the throttle
channel (BEC), insert the bind plug into the bind/data port
and proceed to Step #2.
How to Bind

I-18
The 12X features patented ModelMatch technology that
prevents the operation of a model if the wrong model memory
is selected. During binding the receiver actually learns and
remembers the specific model memory (1 through 50) that the
transmitter is currently programmed to. Later, if the incorrect
model memory in the transmitter is selected and the receiver
is turned on, the model simply won’t operate, preventing a
possible crash. Change programming to the correct model
memory and you’re set to fly.
The JR R1221 receiver features two types of failsafe: SmartSafe
and Preset failsafe.
ModelMatch
Failsafe Functions

I-19
This type of fail-safe is especially ideal for most types of electric
aircraft and is also recommended for most types of gas- and
glow-powered airplanes and helicopters. Here’s how SmartSafe
works.
SmartSafe
When the JR R1221 receiver only is turned on (no transmitter
signal is present) the throttle has no signal output. This
prevents the arming of the electronic speed control. In glow-
powered models, the throttle servo has no input so it remains in
its current position. All other channels are driven to their stored
fail-safe positions.
Receiver Power Only
After Connection
Failsafe for JR/Spektrum
Receiver Power Only
When the transmitter is turned on and after the receiver
connects to the transmitter, normal control of all channels
occurs. After the system makes a connection, if loss of signal
occurs, SmartSafe drives the throttle servo only to its preset
fail-safe position (low throttle) that was set during binding.
All other channels hold their last position. When the signal
is regained, the system immediately (less than 4 ms) regains
control.
Preset fail-safe is ideal for sailplanes and is preferred by some
modelers for their glow- and gas-powered aircraft.
When the JR R1221 receiver only is turned on (no transmitter
signal is present) all channels including the throttle have no
signal output. This prevents the arming of the electronic speed
control. In glow-powered models, the throttle servo has no
input so it remains in its current position. All other channels are
driven to their stored fail-safe positions.

I-20
Programming SmartSafe
(All JR DSM and Spektrum Aircraft Receivers)
During the binding process, the bind plug is left in throughout
the process and is removed only after the receiver connects
to the transmitter. After the connection is made, confirmed
by operating the servos, the bind plug can be removed. The
receiver is now programmed for SmartSafe.
Programming Preset Failsafe for JR/Spektrum
(JR R1221, JR R1222, JR R921, JR R922, Spektrum AR9000,
and Spektrum AR9100 Receivers Only)
During the binding process, the bind plug is inserted in the
bind port or in the charge jack, and then the receiver is powered
up. The LED’s in each receiver should blink, indicating that the
receiver is in bind mode. Now before binding the receiver to the
transmitter and with the receiver in bind mode, remove the bind
plug. The LED’s will still be blinking. With the control sticks and
switches in the desired fail-safe positions, bind the transmitter
to the receiver by pressing and holding the bind buttons on the
back of the transmitter/module and turning on the transmitter.
The system should connect in less than 15 seconds. The
receiver is now programmed for preset fail-safe.
Note: Fail-safe positions are stored via the stick and
switch positions on the transmitter during binding.
After Connection
When the transmitter is turned on and after the receiver
connects to the transmitter, normal control of all channels
occurs. After the system makes a connection, if loss of signal
occurs, preset fail-safe drives all servos to their preset fail-safe
positions. For sailplanes it’s recommended that the spoilers/
flaps deploy to de-thermalize the aircraft, preventing a flyaway.
Some modelers using powered planes prefer to use this failsafe
system to program a slight turn and low throttle to prevent
their aircraft from flying away. When the signal is regained, the
system immediately (less than 4 ms) regains control.