Horizon Hobby JR DSM 12x Instruction And Programming Manual

I-1

INSTRUCTION AND
PROGRAMMING MANUAL

12-CHANNEL COMPUTER RADIO

SYSTEM WITH SPEKTRUM 2.4GHz DSM

TECHNOLOGY

I-2

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

I-3

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

I-4

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

I-5

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

I-6

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

I-7

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

I-8

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

I-9

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

I-10

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 parkflyer­type 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 “color­coded” 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 glow­powered 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.

I-21

90 feet (30 paces)

Before each flying session, and especially with a new model,

it’s important to perform a range check. The 12X incorporates
a range testing system which, when the bind button on the
transmitter is pressed and held, reduces the output power,
allowing a range check.

Range Testing

Range Testing

1. With the model resting on the ground, stand 30 paces

(approx. 90 feet) away from the model.

2. Face the model with the transmitter in your normal flying
position and depress and hold the bind button on the back
of the transmitter. This causes reduced power output from
the transmitter.

3. You should have total control of the model with the button
depressed at 30 paces (90 feet).

4. If control issues exist, call the Product Support Department
at 1-877-504-0233 for further assistance.

Advanced Range Testing Using a Flight Log

While the above Standard Range Testing procedure is
recommended for most sport aircraft, for sophisticated aircraft
that contain significant amounts of conductive materials (i.e.
turbine-powered jets, some types of scale aircraft, aircraft with
carbon fuselages, etc.) the following advanced range check

will confirm that all internal and remote receivers are operating
optimally and that the installation (position of the receivers)
is optimized for the specific aircraft. This Advanced Range

Check allows the RF performance of each remote receiver to

be evaluated and to optimize the locations of each individual
remote receiver.

I-22

Advanced Range Testing

Plug a Flight Log (optional, JRPA145) into the data port in the

receiver and turn on the system (Tx and Rx).

Advance the Flight Log until F- frame losses are displayed by

pressing the button on the flight log.

Have a helper hold your aircraft while he observes the Flight

Log data.

Standing 30 paces away from the model and helper, face the

model with the transmitter in your normal flying position and
depress and hold the bind button on the back of the transmitter.
This causes reduced power output from the transmitter.

Have your helper position the model in various orientations
(nose up, nose down, nose toward the Tx, nose away from

the Tx, etc.) while your helper watches the Flight Log noting

any correlation between the aircraft’s orientation and Frame

Losses. Do this for 1 minute. The timer on the transmitter can

be used here. For giant-scale aircraft, it’s recommended that the

airplane be tipped up on its nose and rotated 360 degrees for

one minute then record the data. Next place the airplane on its
wheels and do a second test rotating the aircraft in all directions
for one minute.

After one minute release the bind button. A successful range
check will have less that ten recorded frame losses. Scrolling

the Flight Log through the Antenna fades (A, B, L, R) allows

you to evaluate the performance of each receiver. Antenna
fades should be relatively uniform. If a specific antenna is
experiencing a high degree of fades, then that antenna should
be moved to a different location.

A successful Advanced test will yield the following:

• H- 0 holds

• F- Less than 10 frame losses

A, B, R, L- Frame losses will typically be less than 100.

It’s important to compare the relative frame losses and if a
particular receiver has a significantly higher frame loss value

(2X to 3X) then the test should be redone; if the same results

occur, move the offending receiver to a different location.

I-23

Flight Log—Optional for JR R1221 Receiver

Using the Flight Log

Press the button to display the following information:

• A - Antenna fades on internal antenna A

• B - Antenna fades on external antenna B

• L - Antenna fades on the left external antenna

• R - Antenna fades on the right external antenna

• F - Frame loss

• H - Holds

Antenna fades—represents the loss of a bit of information on
that specific antenna.

Typically it’s normal to have as many as 50 to 100 antenna

fades during a flight.

If any single antenna experiences over 500 fades in a single

flight, the antenna should be repositioned in the aircraft to
optimize the RF link.

Frame loss—represents simultaneous antenna fades on all
attached receivers. If the RF link is performing optimally, frame
losses per flight should be less that 20.

Holds are indicated when 45 consecutive (one right after the

other) frame losses occur.

This takes about one second. If a hold occurs during a flight,
it’s important to re-evaluate the system, moving the antennas

to different locations and/or checking to be sure the transmitter

and receivers are all working correctly.

Note: A servo extension can be used to allow the Flight

Log to more conveniently be plugged in without having to
remove the aircraft’s hatch or canopy. On some models,
the Flight Log can be plugged in, attached and left on

the model using double-sided tape. This is common with

helicopters, mounting the Flight Log conveniently to the

side frame.

The Flight Log is compatible with JR R1221 receivers. The
Flight Log displays overall RF link performance as well as the

individual internal and external receiver link data. Additionally it
displays receiver voltage.

After a flight and before turning off the receiver or transmitter,
plug the Flight Log into the Data port on the JR R1221
receiver. The screen will automatically display voltage i.e.

(6v2= 6.2 volts ).

Note: When the voltage reaches 4.8 volts or less, the

screen will flash indicating low voltage.

JRPA145

I-24

With all radio installations it is vital that the onboard power
system provides adequate power without interruption to the
receiver even when the system is fully loaded (servos at
maximum flight loads). This becomes especially critical with

giant-scale models that utilize multiple high torque/ high

current servos. Inadequate power systems that are unable to
provide the necessary minimum voltage to the receiver during
flight loads have become the number one cause of in-flight
failures. Some of the power system components that affect the
ability to properly deliver adequate power include: the selected
receiver battery pack (number of cells, capacity, cell type, state
of charge), switch harness, battery leads, regulator (if used) and
power bus (if used).

While JR’s receiver’s minimum operational voltage is 3.5

volts, it is highly recommended the system be tested per the

guidelines below to a minimum acceptable voltage of 4.8

volts during ground testing. This will provide head room to
compensate for battery discharging or if the actual flight loads
are greater than the ground test loads.

1. When setting up large or complex aircraft with multiple high
torque servos, it’s highly recommended that a current and

voltmeter (HAN172) be used. Plug the voltmeter in an open

channel port in the receiver and with the system on, load
the control surfaces (apply pressure with your hand) while
monitoring the voltage at the receiver. The voltage should

remain above 4.8 volts even when all servos are heavily

loaded.

Note: The optional Flight Log has a built-in voltmeter and

it can be used to perform this test.

2. With the current meter inline with the receiver battery lead,
load the control surfaces (apply pressure with your hand)
while monitoring the current. The maximum continuous

recommended current for a single heavy-duty servo/battery

lead is three amps while short duration current spikes

of up to five amps are acceptable. Consequently, if your

system draws more than three amps continuous or five
amps for short durations, a single battery pack with a single
switch harness plugged into the receiver for power will
be inadequate. It will be necessary to use multiple packs
with multiple switches and multiple leads plugged into the
receiver.

3. If using a regulator, it’s important the above tests are done
for an extended period of 5 minutes. When current passes

through a regulator, heat is generated and this heat causes
the regulator to increase resistance, which in turn causes
even more heat to build up (thermal runaway). While a
regulator may provide adequate power for a short duration,
it’s important to test its ability over time as the regulator
may not be able to maintain voltage at significant power
levels over time.

4. For really large aircraft or complex models (for example

35% and larger or jets), multiple battery packs with

multiple switch harnesses are necessary or in many cases

one of the commercially available power boxes/ busses is

recommended. No matter what power systems you choose,
always carry out test #1 above making sure that the receiver

is constantly provided with 4.8 volts or more under all

conditions.

5. The latest generation of Nickel-Metal Hydride batteries

incorporates a new chemistry mandated to be more
environmentally friendly. These batteries when charged with
peak detection fast chargers have tendencies to false peak
(not fully charge) repeatedly. These include all brands of
NiMH batteries. If using NiMH packs, be especially cautious
when charging making absolutely sure that the battery is
fully charged. It is recommended to use a charger that can
display total charge capacity. Note the number of mAh put
into a discharged pack to verify it has been charged to full
capacity.

Receiver Power System Requirements

Recommended Power System Guidelines

I-25

Tips On Using 2.4GHz Systems

While your DSM equipped 2.4GHz system is intuitive to
operate, functioning nearly identically to 72MHz systems,
following are a few common questions from customers:

Q: Which do I turn on first, the transmitter or the receiver?

A: It doesn’t matter. If the receiver is turned on first, the receiver
starts scanning the band looking for a signal with its pre-bound

GUID. At this time no servo output pulses are present and the

throttle channel doesn’t put out a pulse position, preventing
the arming of electronic speed controllers, or in the case of an
engine-powered aircraft, the throttle servo remains in its current
position. When the transmitter is then turned on, the transmitter
scans the 2.4GHz band and acquires two open channels.
Then the receiver that was previously bound to the transmitter

finds the GUID (Globally Unique Identifier code) stored during

binding. The system then connects and operates normally.

If the transmitter is turned on first, the transmitter scans the 2.4
GHz band and acquires two open channels. When the receiver is
then turned on, the receiver scans the 2.4GHz band looking for

the previously stored GUID; when it locates the specific GUID

code and confirms uncorrupted repeatable packet information,
the system connects and normal operation takes place. Typically

this takes 2 to 6 seconds.

Q: Sometimes the system takes longer to connect and
sometimes it doesn’t connect at all - why?

A: In order for the system to connect (after the receiver is
bound), it must receive a large number of continuous (one after
the other) uninterrupted perfect packets from the transmitter.
This process is purposely critical of the environment, ensuring
that it’s safe to fly when the system does connect. If the
transmitter is too close to the receiver (less that 4 feet) or if
the transmitter is located near metal objects (metal transmitter
case, the bed of a truck, the top of a metal work bench, etc.),
connection can take longer, and in some cases connection will
not occur, as the system is receiving reflected 2.4GHz energy
from itself and is interpreting this as unfriendly noise. Moving
the system away from metal objects or moving the transmitter
away from the receiver and powering the system up again will
cause a connection to occur. This only happens during the

initial connection. Once connected, the system is locked in;

should a loss of signal occur (failsafe), the system connects
immediately (4ms) when the signal is regained.

Q: I’ve heard that the DSM system is less tolerant of low
voltage. Is that correct?

A: All DSM receivers have an operational voltage range of 3.5

to 10 volts. With most systems this is not a problem as, in fact,

most servos cease to operate at around 3.8 volts. When using

multiple high current draw servos with a single or inadequate

battery/ power source, heavy momentary loads can cause the
voltage to dip below this 3.5 volt threshold, thus causing the

entire system (servos and receiver) to brown out. When the

voltage drops below the low voltage threshold (3.5 volts), the

DSM receiver must reboot (go through the start-up process of
scanning the band and finding the transmitter) and this can take

several seconds. Please read the receiver power requirement
on page I-26 as this explains how to test for and prevent this

occurrence. Note the JR R1221 and newly manufactured JR and

Spektrum DSM receivers have a new QuickConnect feature that,

if a temporary power loss occurs, will reconnect the system in

less than .25 seconds. If a power loss or brownout occurs, the

receiver will indicate the power loss by flashing. If you land and
the receiver is flashing, it’s important that you investigate and
correct the issue that caused the power loss.

Q: Sometimes my receiver loses its bind and won’t connect,
requiring rebinding. What happens if the bind is lost in flight?

A: The receiver will never lose its bind unless it’s instructed to.
It’s important to understand that during the binding process

the receiver not only learns the GUID (code) of the transmitter

but the transmitter learns and stores the type of receiver that
it’s bound to. If the bind button on the transmitter is pressed at
any time and the transmitter is turned on, the transmitter looks
for the binding protocol signal from a receiver. If no signal is
present, the transmitter no longer has the correct information to
connect to a specific receiver and, in essence, the transmitter

has been “unbound” from the receiver. We’ve had several

customers that use transmitter stands or trays that unknowingly
depress the bind button and the system is then turned on,
losing the necessary information to allow the connection to take
place. We’ve also had customers that didn’t fully understand the
range test process and pushed the bind button before turning

on the transmitter, also causing the system to “lose its bind.”

If, when turning on, the system fails to connect, one of the
following has occurred:

I-26

The wrong model has been selected in the model memory
(Model Match).

The transmitter is near conductive material (Tx case, truck bed,
etc.) and the reflected 2.4GHz energy is preventing the system
from connecting (see #2 above).

The bind button was unknowingly (or knowingly) depressed and
the transmitter was turned on previously, causing the transmitter
to no longer recognize the receiver.

Q: Can I use a 3-cell LiPo pack in my transmitter?

A: No. All current JR and Spektrum transmitters are designed

to operate using a 9.6-volt transmitter pack. A fully charged
3-cell LiPo pack puts out 12.6 volts. This higher voltage can

overload the power-regulating transistor, causing damage
and or failure, possibly in flight. Many of our customers have

experienced failures using 3-cell LiPo packs and their use in

JR and Spektrum transmitters is highly advised against. The

12X system will operate for over 8 hours using the included

2000mAh NiMH battery.

6. Q: How important is it that I test my system using a flight

log?

A: For most sport airplanes and helicopters the use of the flight
log is unnecessary. For sophisticated aircraft, especially those
that have significant conductive materials within the airframe

(i.e. jets, scale airplanes, etc.), the Flight Log offers an extra

measure of confidence that all radio components are working

optimally. The Flight Log is an important tool that allows the

confirmation that the installation (position of the internal and
remote receivers relative to the conductive materials in the
aircraft) is optimized and that the RF (radio) link is operating at
the highest levels of performance.

A-1

The ACRO mode is intended for powered fixed-wing aircraft.

It contains a host of advanced features that are designed to
assist the pilot in realizing the full potential of the aircraft. These
features include:

• Up to 5 flight modes

• Switch and lever assignability

• Triple Rates and Exponentials for Aileron, Elevator and

Rudder that can be combined or assigned to flight modes

• 4 programmable Wing Types (Normal, Flaperon, Delta,

4-aileron)

• Aileron Differential with two values

• V-Tail mixing

• Dual Channels for All Primary Flight Controls and Flaps

• Dual Throttles (With Independent Trims and Throttle
Curves)

• Adjustable Trim Rates (10–100 Trim Steps)

• L.S.T. trim—trim can be programmed to affect end points

or center point only

• Elevator-To-Flap mixing

Airplane – Acro Mode

• Aileron-To-Flap mixing

• Governor mixing

• Balance mixing allows precise mixing of slave channel to

master at multiple points

• Throttle hold—can be assigned as a kill switch

• Aileron-To-Rudder mixing

• Throttle Curves (2)

• Flap System (With Elevator Trim, Auto Land, Elevator/Flap

Delay)

• Gyro System (In-Flight Gain Selection of 3 Gains for up to

2 Gyros)

• Servo Speed (Independent in Both Directions – Eliminates

Door Sequencers)

• 8 Programmable Mixers (Includes 5 Multi-Point Mixers)

• Programmable Trainer System (Selectable Channels for
Student Control)

• Timers- up to three (Stopwatch, Countdown, Integrated)

• Servo Monitor (Automatically Renames Channels According

to Assignments)

• Pitch Curve Mixing for variable pitch props

A-2

Transmitter Identification ACRO

Right Trimmer/Trainer

Switch

Left Trimmer/Trainer

Switch

Antenna

Elevator D/R

Power Switch

AUX 5 Knob

Throttle Trim

Aileron/Elevator Stick

Mix Switch

Handle

Flap Switch

Throttle/Rudder Stick

Rudder D/R Switch

Elevator Trim

Rolling selector

Flight Mode Switch

LCD Screen

AUX 4 Knob

Rudder Trim

Left Side Lever

Aileron Trim

Aileron D/R Switch

Programming Buttons

Gear Switch

Right Side Lever

AUX 2 Switch

A-3

Battery Door

Bind/Range Check Button

AUX 7 Knob

Handle

Left Slider

Aileron Spring Tension Cover

AUX 6 Knob

Trainer/Transfer/PC Interface Jack

Right Slider

Elevator Spring Tension Cover

Rudder D/R

Charge Jack

Throttle Spring Tension Cover

Rudder Spring Tension Cover

A-4

System mode contains the foundational programming that is
normally only used when first setting up a model. System mode
functions include: model select, model name, model reset,
wing type, etc.—functions that are typically set once during

setup and then are seldom changed or adjusted. Below, and

throughout this section, the functions are in the order that they

appear in the System Mode List.

Press ENT and hold while turning on the transmitter.

The screen should appear as shown above.

SYSTEM MODE LIST

System mode contains the follow screens:

84: Model SEL Model Select Page A-6

81: MDL Name Model Name Page A-8

28: MDL Reset Model Reset Page A-9

89: Type SEL Type Select Page A-10

85: MODULAT Modulation Page A-11

(12X MV system only)

System Mode

93: Freq SEL Frequency Select Page A-11

(12X MV system only)

83: Trim SYS Trim System Page A-13

91: STK Pos SW Stick Position Switch Page A-15

92: FM Name Flight Mode Name Page A-16

86: Transfer Model Transfer Page A-17

97: Warning Warning Page A-19

98: Settings Settings Page A-20

17: Device SEL Device Select Page A-21

22: Wing Type Wing Type Page A-27

To Enter System Mode

A-5

FUNCTION MODE contains programming functions that are

used to complete the setup and then used to adjust and fine-

tune how the model flies. Below, and throughout this section,

the functions are in the order that they appear in the Function

List.

Press the LIST button after the transmitter is powered-up to
obtain the FUNCTION LIST.

Function Mode

Function Mode List

Function mode contains the follow screens:

11: REV. SW Reverse Switch Page A-31

12: TRVL ADJ. Travel Adjust Page A-31

13: D/R & EXP Dual Rate and Exponential Page A-32

15: Sub Trim Sub Trim Page A-33

16: THRO Hold Throttle Hold Page A-33

18: THRO CURV. Throttle Curve Page A-34

24: SRV. Speed Servo Speed Page A-35

31: Snap Roll Snap Roll Page A-36

32: DIFFEREN. Differential Page A-37

33: Balance Balance Page A-38

44: Gyro SENS Gyro Sensor Page A-39

45: Governor Governor Page A-40

62: AILE- RUDD Aileron to Rudder Mix Page A-41

63: ELEV- FLAP Elevator to Flap Mix Page A-42

64: RUDD- A/E Rudder to Aileron/Elevator Mix Page A-43

66: FLAP SYS. Flap system Page A-44

51: PROG. MIX1 Program mix 1 Page A-46

52: PROG. MIX2 Program mix 2 Page A-46

53: PROG. MIX3 Program mix 3 Page A-46

54: PROG. MIX4 Program mix 4 Page A-46

55: PROG. MIX5 Program mix 5 Page A-46

56: PROG. MIX6 Program mix 6 Page A-46

57: PROG. MIX7 Program mix 7 Page A-46

58: PROG. MIX8 Program mix 8 Page A-46

67: AILE-FLAP Aileron-To-Flap mix Page A-54

68: PIT. CURV Pitch Curve Page A-55

75: Monitor Monitor Page A-58

76: MIX MON Mix Monitor Page A-58

77: Fail Safe Fail Safe Page A-58.5

(12X MV system only)

78: Trainer Trainer Page A-59

87: Timer Timer Page A-60

To Enter Function Mode

A-6

Programming a new model generally begins by accessing
the SYSTEM Mode List. System Mode is where models are

selected, the model type is chosen (airplane, helicopter or
sailplane) and other high-level information is programmed
for the model. It is also used to activate some of the more
advanced programming features such as Flight Modes, Switch

Assignments, Wing Types and Dual Control functions.

Model select allows the programming parameters for up to 50
different models to be stored and selected in up to 50 individual

model memories. This screen also allows a model to be copied
from the current selected model to any of the other 49 available
internal model memories (model copy).

Note: When setting up a new model, it is recommended
that an unused model memory is selected. If a current
model memory is selected, it’s recommended that the
model be reset to the factory default setting before
programming the new model. See model reset page A-9.

System Mode

84: MODEL SELECT- (Copy Function)

Accessing the System Mode

1. The System menu [System Mode List] is obtained by
holding down the ENT button while turning the transmitter

on.

A-7

1. In the SYSTEM MODE, highlight and select Model SEL

using the rolling Selector.

2. Use the rolling Selector to highlight MODEL then press the

roller and select the desired model number to be used.

3. Return to the SYSTEM Menu by pressing the LIST button.

Making a backup copy of the model memory protects against
losing the original program and also allows one to experiment
with the original program, knowing that the original settings
can be restored by copying the backup copy back to the original
model memory.

1. In the SYSTEM MODE, highlight and select Model SEL

using the rolling Selector.

2. Use the rolling Selector to highlight Select then press the
roller to access Model Copy.

3. Rotate the roller to select the desired model memory that
you wish to copy the current program to (1-50).

4. Press the roller to select the highlighted model that you

wish to copy to.

5. Press the COPY button to copy the current model list above

to the selected model listed below.

6. Return to the SYSTEM Menu by pressing the LIST button.

Note: The model memory that is copied to will be
replaced with the current model memory programming. It
is recommended that a model memory that is not being

used be selected to “copy to,” as the information in that

memory will be erased and replaced with the current
model memory during copying.

To Select a Model Memory

Model Copy

To Copy a Model to Another Internal Memory

A-8

The model name screen allows each model to be given up to a
sixteen-digit name or number. This is convenient for identifying
a model. The model’s name will appear on the main info screen.

81: Model Name

1. In the SYSTEM MODE, highlight and select MDL Name

using the Selector.

2. Position the cursor using the roller (indicates where the

next character will be placed) at the beginning of the

model name. Press the Selector to obtain a list of available

characters.

3. Highlight and select the desired character to form the model

name. After the character is selected, rotate the Selector to
position the cursor where the next character is to be placed
and press the Selector to obtain the character list again.
Repeat until the model name is completed.

4. Return to the SYSTEM Menu by pressing the LIST button.

To Name a Model

A-9

Model Reset is used to reset all programming to factory default
settings. When setting up a new model it is important to
reset all parameters to their default or factory settings before
proceeding with any other programming. This is to ensure that
there are no programming values or functions active from a
previous model or programming session.

28: Model Reset

1. In the SYSTEM MODE, highlight and select MDL Reset

using the Selector.

2. Press the CLR button that is next to RESET on the display.

3. Press the lowermost button next to YES on the display to

reset all data for this model.

4. Return to the SYSTEM Menu by pressing the LIST button.

To Reset a Model Memory

A-10

Type select allows the model type to be selected. Model types

include HELI (helicopter), ACRO (airplane) and GLID (glider).

Note: When changing model types, the programming
information will be reset to the factory default setting,
losing the previous settings.

89: Type Select

1. In the SYSTEM MODE, highlight and select Type SEL using

the Selector.

2. Highlight and select ACRO using the Selector and press the
selector to access the ACRO mode.

3. Return to the SYSTEM Menu by pressing the LIST button.

To Select a Model Type

A-11

85: Modulation - (12X MV System only)

Note: This function is only available on the 12X MV

version and only when the TSM-72A 72MHz module is
plugged in.

Important: When the 72MHz module is plugged in and
the system is turned on, the antenna must be attached.

Operating the 72MHz module without the antenna attached

could overload the internal transistor causing a failure.

Warning: Only the JR TSM-72A and JRM2.4 modules
are compatible with the 12X MV. Do not install a standard-

type JR, Spektrum or other branded module in the 12X as
damage will occur.

The 12X MV version radio system allows the RF module to be

replaced allowing the system to operate on 72MHz or 2.4GHz.
Note that the transmitter automatically detects which module is
installed and modifies the accessible programming appropriate
to the module selected.

The Modulation screen (code 85) allows the selection of

modulation for 72MHz receiver types. Modulation types
available are:

Note: APCM - JR’s newest version PCM (not available in
the U.S.)

• SPCM - Most currently available JR PCM receivers use this

type of modulation

• ZPCM - Compatible with older JR receivers

• PPM - FM modulation

Note: It’s important to select the modulation to match
the receiver type. JR receivers have the modulation type
printed on the receiver.

1. In the SYSTEM MODE, highlight and select Type
MODULAT. using the Selector.

2. Highlight and select the currently selected modulation type

(APCM) using the Selector and press the selector to access
all available modulation types (APCM, SPCM, ZPCM,
PPM).

Note: APCM modulation is only available in Japan market

receivers

To Program a Modulation Type

3. Rotate the roller to highlight the desired modulation type

then press the roller to select the modulation type.

4. Return to the SYSTEM Menu by pressing the LIST button.

A-12

Note: This function is only available on the 12X MV

version and only when the TSM-72A 72MHz module is
plugged in.

Important: When the 72MHz module is plugged in and
the system is turned on, the antenna must be attached.

Operating the 72MHz module without the antenna attached

could overload the internal transistor causing a failure.

Warning: Only the JR TSM-72A and JRM2.4 modules
are compatible with the 12X MV. Do not install a standard

type JR, Spektrum or other branded module in the 12X as
damage will occur.

93: Frequency Select- (12X MV system only)

The 12X MV version radio system allows the RF module to be

replaced allowing the system to operate on 72MHz or 2.4GHz.
Note that the transmitter automatically detects which module is
installed and modifies the accessible programming appropriate
to the module selected.

The Frequency Select function allows the selection of 72MHz

channels 11 through 60 when the 72MHz module is installed.

This screen displays the channel and corresponding frequency.

1. In the SYSTEM Menu, highlight and select Type FREQ SEL.

using the Selector.

2. Highlight and select the currently selected channel using
the Selector and press the selector to access all available
channels.

3. Rotate the roller to select the desired channel then press the

roller to select that channel. The selected channel will be
displayed on the main screen every time the transmitter is

turned on and RF-ON or RF-OFF will be displayed on the
left side of the screen. To transmit press RF-ON.

To Select a Frequency

A-13

The Trim System function adjusts the sensitivity of the 12X trim
levers and the Flap and Aux trimmers (right and left trimmers).

The standard digital trims are adjustable from 0–10 with 10

being the coarsest adjustment and 0 being trim off. Adjusting
the digital trim values has no effect on the total trim travel,
however, it affects the resolution of each trim input. When the
value is set to 10, each click of trim adjusts the servo output by
10ms and there are only 10 trim increments from center to each

end. When set to 5, the output is changed 5ms per trim step

and there are 20 trim increments from center to each end. When
set to 1, each click of trim changes the servo output by 1ms
and there are 100 trim increments. When set to 0 the trim levers
cease to function effectively, turning off the trim function. The
right and left trim levers are adjustable from 0 to 200 and can

be turned on/ off. When adjusted to above 100% the trimmer

functions as a two- or three-position switch. Reducing the value
increases the number of output positions.

When adjusting the digital trims (AILE, ELEV, RUDD), the total
trim travel does not change – only the number of increments

(beeps) changes, which makes for finer or coarser trim
movements. When adjusting the analog throttle trim, however,
the total trim travel is actually reduced when set to less than

100%.

Use a fairly coarse setting, such as the factory default 4, when

test flying a model for the first flights in order to be able to

trim it quickly; then use a finer setting, such as 3–1, for final

precision trimming.

83: Trim System

L.S.T. Trim (Limited Standard Trim)

The L.S.T. trim feature has two options: L.S.T. and normal. In

normal, when making trim changes using the aileron, elevator
or rudder digital trims, the center as well as the end points is
affected by the trim values. The right trim causes the center,
the right end point and the left end point to all shift to the

right. When L.S.T. is activated, only the center position is

trimmed. The center is shifted to the right but the endpoints
are not affected. This is useful for aircraft that have a hard stop
endpoint to prevent over-travel caused by trim or if it’s desired
to have trim changes not affect the total roll pitch or yaw rate.

A-14

1. Highlight and select TRIM SYS. in the SYSTEM MODE to

acquire the Trim System function.

2. Highlight and select the trim that is to be changed and

use the Selector to set a value of 1–10 (1 = finest, 10 =

coarsest).

1. Highlight and select the desired channel (AILE, ELEV or
RUDD) next to (TYPE) L.S.T. and press the roller to select
L.S.T. or NORM

2. Repeat for other channels as desired

To Adjust the Trim Rates:

To Select the L.S.T. Trim Function

Note: The Flap and AUX trims are adjustable from 0 to

200 and can be turned off or on by selecting On or Off.

3. Repeat for other trims as desired.

A-15

The Stick Position Switch function allows the throttle, aileron

elevator or rudder stick positions to be preprogrammed to turn

on/ off mixes, change throttle curves, change differential rates,

start a timer and other functions. An example of this would be

to have a smoke system that turns off below 25% throttle to

prevent low throttle flameouts. Four stick position programs are
available and one or more can be assigned to various mixes or

functions. The stick position that turns the Stick Position switch
off /on is selectable as well as the direction to turn on/ off. Also

a symmetrical option is available that allows the function to
be turned on with a preprogrammed equal right or left (up or
down) stick position.

1. In the SYSTEM MODE, highlight and select STK PosSW

using the Selector.

2. Highlight the desired Stick position switch that you desire

to use (SPS0, SPS1, SPS2, or SPS3) and press the roller.

All four are the same.

3. Select the desired channel that will be used to trigger the
Stick position (Throttle, Aileron, Elevator, and Rudder).

4. Rotate the roller to select POS and adjust to the desired
value that you wish to have the mix function turn off/ on.
0 = center, L100= Left full stick travel, etc. Note ON/ OFF

is displayed at the top of the screen and when moving the
stick this will indicate that the function is working.

5. Use the roller to select ON and select Low/ High or Right /
Left to access the desired direction that the function will
turn on/ off.

91: Stick Position Switch

6. A symmetrical function is available that allows the stick
position to be turned on/ off as the stick is displaced

symmetrically in either direction. It’s necessary to first

program a value in the POS, then highlight the SYM

and activate it using the roller. The center can now be

programmed to turn on or off by selecting the ON and
highlighting Low/ High or Right /Left.

Note: The above procedure establishes the base for

turning on/ off mixes, change throttle curves, changes

differential rates, etc. To program the stick position, it’s
necessary to go to the desired function in Function mode

and select SPS0, SPS1, SPS2 or SPS3 under SW (switch)

in that specific function.

7. Return to the SYSTEM Menu by pressing the LIST button.

To Program a Stick Position Switch

A-16

The Flight Mode Name program allows each flight mode to be

custom named with up to six characters. On the main screen

an abbreviated (short name of up to four characters) will be
automatically displayed when that flight mode is selected.

Examples for flight mode names may include 3DRATE, LAND,
ROLLER, etc.

1. In the SYSTEM MODE, highlight and select FM Name using

the Selector.

2. Highlight the desired flight mode character position using
the roller, then press the roller to access the list of the
available characters.

3. Highlight and select the desired character to form the

flight mode name. After the character is selected, rotate the
Selector to position the cursor where the next character is
to be placed and press the Selector to obtain the character
list again. Repeat until the flight mode name is completed.

92: Flight Mode Name

To Program a Flight Mode Name

4. Use the roller to highlight the * below the flight mode name

and press the roller to select up to four characters from
the above flight mode to be automatically displayed on the
main screen when that flight mode is selected.

5 Return to the SYSTEM Menu by pressing the LIST button.

A-17

The TRANSFER function allows one 12X transmitter to transfer a

model memory for a specific model to another 12X transmitter.
This function is also used to transfer a model memory to the

included PC Data Transfer allowing unlimited model memory

storage and backup of your model’s programming. The Transfer
function is also used to receive data from another 12X or from

the PC Data Transfer.

Note: The sending and receiving transmitters must

both be 12X’s or the PC Data Transfer device and a 12X.

Transfer is not possible with any other system.

86: Transfer

Preparing the 12X to Receive a Model Transfer

1. Hold the ENT button while plugging the Trainer cord into
the back of the transmitter to obtain the SYSTEM List. Plug
the other end of the DSC cord into another 12X transmitter
while holding the ENT button and after the following,

prepare that transmitter for transfer send as described
above.

2. Highlight and select TRANSFER in the SYSTEM Menu to

obtain the Transfer display.

3. If RECEIVE is already displayed, continue with the next step.

If TRANSMIT is displayed, highlight and select TRANSMIT,

changing it to RECEIVE.

4. Select the model memory that is to receive the data by

highlighting and selecting the model name/memory number

and then scrolling to and selecting the model memory that
is to receive the data. Select an unused model memory or
a memory that contains data for a model that is no longer
needed as the data in this model memory will be replaced
by the model memory that is transferred and will be
permanently lost.

Note: The receiving model name/memory number can

not be the currently selected model. If you wish to receive

a model in the currently selected model name/memory

number, go to the model select function and select a
different model, then reenter the transfer function and
follow the instructions above.

5. Press START on the left side of the display. Stand-by

appears at the bottom of the display indicating that the
system is ready to receive data. Follow the next steps to
prepare the sending transmitter for memory transfer.

A-18

Preparing the 12X to Send a Model Transfer

1. With the other end of the trainer cord plugged into the

sending 12X transmitter in SYSTEM List as described in
step 1 above, highlight and select TRANSFER (code 86) in
the SYSTEM Menu to obtain the Transfer display.

2. The model to be transferred must be the currently selected
model. If the model to be transferred is not currently

selected, see Model SEL in the SYSTEM Menu to select the

model to be transferred.

3. When the receiving 12X is ready, press START on the left

side of the display. The data for the currently selected model
is transferred to the receiving device.

A-19

The Warning function can be programmed to sound an alarm if
a selected flight mode, switch positions or throttle stick position
is in an inappropriate position when the transmitter is turned
on. For example if the gear switch is in the retraced position
and the transmitter is turned on, an alarm can sound warning
that the switch will cause the gear to retract if the receiver is

turned on. Or if the throttle is above a preprogrammed position

when the transmitter is turned on an alarm will sound warning
of an unsafe throttle position for startup. Stick positions can

also be programmed to sound alarms. See page A-15 for

programming stick position switches. Note that during the
warning no signal is being transmitted. The Throttle stick is

defaulted with a warning above 10% and an alarm will sound
and no signal will be transmitted if the throttle is above 10%

and when the transmitter is turned on. The warning function is
available for the following:

• Flight Mode 0 • Flight Mode 1

• Flight Mode 2 • Flight Mode 3

• Flight Mode 4 • Flap Switch Normal

• Flap Switch Mid • Flap Switch Land

• Gear Switch • Mix Switch

• Stick Position Switch 0 • Stick Position Switch 1

• Stick Position Switch 2 • Stick Position Switch 3

• Throttle Stick Position • Aileron 1

• Aileron 2 • AUX2 up

• AUX2 middle • AUX2 down

97: Warning

1. In the SYSTEM MODE, highlight and select Warning using

the Roller.

2. Highlight the desired flight mode, switch position or stick

position switch (SPS) then press the roller to turn on

off that function as a warning. Note that it is possible to
activate multiple functions as a warning.

Note: To select a Stick Position Switch as a warning it

is first necessary to activate the stick switch. See Stick

Switch Position Code 91 on page A-15 for more details.

3. If a throttle stick position is desired as a warning, highlight

INH next to throttle and press the roller to activate the

throttle stick position. Rotate the roller to select POS

and adjust to the desired value that you wish to have the

warning sound. Note that 0= low throttle, 50 = 50% throttle,
etc. ON/ OFF is displayed at the top of the screen and when
moving the stick this will indicate that the function is on/

off. The throttle stick position warning comes default set to
active with a position of 10.

4. Use the roller to select ON and select Low or Hi to have the
alarm sound above or below the POS position.

5. Return to the SYSTEM Menu by pressing the LIST button.

To Program a Warning

A-20

The Settings program allows the screen backlight to be

turned on/ off/ or placed in auto (sleep) mode. This function

also allows the audible beeper to be turned on or off. These

functions are defaulted to Backlight Auto and Silent Mode off.

98: Settings

1. In the SYSTEM MODE, highlight and select Settings using

the Selector.

2. Highlight the desired function. Display backlight or Silent
Mode using the roller then press the roller to access and
change the settings.

3. Return to the SYSTEM Menu by pressing the LIST button.

To Change Transmitter Settings

A-21

Device Select is used to activate some of the more advanced

features of the 12X. The Device SEL function is used to activate/

inhibit the following:

• Flight Modes (5 in total)

• Throttle Hold

• Flap Trim

• Trim Common

• Switch, Lever and Knob Assignments

• Activate/Inhibit Switches/Channels

• Activate/Inhibit the Governor

• Activate/Inhibit the Gyro

• Activate/Inhibit the Pitch Curve Function

• Activate/Inhibit the Flap System

• Assign Functions and Channel to the Desired
Switch Knob or Lever

Each of these options is described as follows.

17: Device Select

Flight Modes

A Flight Mode represents an aircraft configuration (Dual Rate/
Expo, program mixes, Aileron Differential, Flap System, Gyro

System, etc.) that is programmed to optimize the control system
to assist the pilot and the aircraft in performing a specific type

of maneuver. Up to 5 flight modes are available in the 12X.

The objective of programming Flight Modes is to provide the
ability to select a switch position to activate a collection of
settings that are optimized to perform a maneuver. An aerobatic
aircraft, for example, may be set up such that the Flight Mode
switch in its 1st position (FM 0) configures the aircraft for

precision flying; positioning the switch in its 2nd position (FM

1) sets the aircraft up for snap rolls; and positioning the switch
in its 3rd position (FM 2) sets the aircraft up for aggressive
3D flight. Flight Modes could just as easily represent aircraft
settings for Take Off, Flying, and Landing for a turbine-powered

jet aircraft. Flight Modes can make the pilot’s job easier by
configuring and optimizing the aircraft to do different things by
flipping a single switch.

Most of the functions found in the 12X that are switch
selectable including programmable mixers, throttle curves,
differential, gyro settings, servo speed, etc. can be assigned
to one or more Flight Modes. This provides the ability to have

up to 5 completely different aircraft configurations that are

selectable in flight using switches.

Five Flight Modes are available in the 12X system. When 3

Flight Modes are activated, they are selected during flight by

using one of six 3-position switches (Flight mode switch,
Rudder D/R switch, Flap switch, Elevator D/R switch, Aux 2
switch, Aileron D/R switch, or Inhibit). To activate the 2 Extra
flight modes (5 flight modes in total) the 4th and 5th flight

modes are assigned to one of the following switches (Mix

switch, Elevator D/R switch, Gear switch, Aileron D/R switch,
one of the stick position settings (SPO0-SPO3), or Inhibit).

Flight mode switches are selected and activated in the Device

SEL function in the System menu. Once Flight Modes are

activated, the pilot has a choice of using the Flight Mode switch

to select up to 5 Dual Rates and Exponential settings for each
of the primary controls (ELEV, AILE, RUDD), or Dual Rates
and Exponential settings may continue to be controlled by the
3 individual Dual Rate switches. All other functions that can

be activated by a switch can be assigned to 1 or more Flight
Modes when Flight Modes have been activated.

A-22

To Activate Flight Modes

1. From SYSTEM Mode List, highlight and select DeviceSEL

using the Selector.

2. Using the Selector, highlight and select INH next to FLIGHT
MODE. When selected, 7 options appear: (Flight Mode
SW, Rudder D/R SW, Flap SW, Elevator D/R SW, Aux 2 SW,
Aileron D/R SW, or INH) Highlight and select the desired

flight mode switch.

Once Flight Modes have been activated, FLAP TRIM and TRIM

appears on the display.

3. To activate the two extra flight modes, using the Selector,
highlight and select INH next to EXTRA. When selected,
8 options appear: MIX SW, Elevator D/R SW, GEAR SW,
Aileron D/R SW, SPO0, SPO1, SPO2, SPO3, or INH)
Highlight and select the desired EXTRA flight mode switch

to activate the additional two flight modes.

A-23

The throttle hold function is normally used as a kill switch

for glow-powered airplanes or as a safety/ arming switch

for electric-powered aircraft. It can also be used to preset
a programmed throttle position. For example with electric
sailplanes it can be used to give full power when the switch
is activated. The throttle hold function switch position and
direction is assigned in Device Select. The actual programming

of the throttle hold position is done in Code 16 Throttle Hold
screen in the Function mode (see page A-33).

1. In Device Select, highlight and select Throttle Hold using
the Roller.

2. Using the Selector, highlight and select MIX SW next
to THRO Hold. When selected, 12 switch options and

directions appear: Highlight and select the desired throttle
hold switch and direction.

Throttle Hold

To Assign Throttle Hold to a Switch

Note: Throttle hold is defaulted to the mix switch.

A-24

1. The digital FLAP TRIM lever is located on the front right

face of the transmitter and is accessed with your right
index finger. Flap Trim may be activated or deactivated in

the Devic.SEL function by using the Selector to highlight
either ON or OFF and pressing the Selector. The flap trim is
defaulted to ON.

Flap Trim

Ordinarily this switch should be turned OFF, even if the aircraft

has flaps or dual ailerons, The 12X provides other means of
controlling flaps and disabling this switch will help prevent an
out-of-trim condition if flaperons are used and the trim lever is
accidentally moved.

A-25

The Trim function can be toggled between COM (common)
and F.M. (Flight Mode) by pressing the Selector when COM
or F.M. is highlighted. In the COM mode, the digital trims for
Elevator, Ailerons, and Rudder are common or shared in all

Flight Modes. If a trim change is made in any flight mode, the
trim in all flight modes are also changed (common trims in all
flight modes). If F.M. is selected in Stunt Trim, the 12X stores
the digital trim positions independently for each Flight Mode.
This allows the aircraft to be independently trimmed in each
flight mode and when that flight mode is selected the previously
set trim value for that flight mode is active. This is a very useful
feature if switching between Flight Modes causes the aircraft’s

trim to change, such as when flaps are deployed by one of the
Flight Modes causing the aircraft to have a pitch change. In this

case, the pilot can simply use the Elevator digital trim to trim
the Elevator to correct the pitch up tendencies when the flaps

are deployed using a flight mode. Selecting each Flight Mode
brings in a corresponding set of trims, allowing the aircraft to
be independently trimmed for each flight mode during flight.

Note: When Trim is set to FMOD, be aware during the

first flight and remember that the aircraft will need to be

trimmed using the digital trims for Aileron, Elevator and

Rudder for each Flight Mode selected during flight. If the
aircraft is badly out of trim, remember that when switching
from flight modes each flight mode will require trimming.

Trim

A-26

The 12X provides the ability to change the standard default

switch assignments for the GEAR, FLAP, AUX2, AUX3, AUX4,
AUX5, AUX6, and AUX7 channels. Changing the switch

assignments is a matter of preference. The standard switch

assignments may be changed in the Devic.SEL function
contained in the SYSTEM MODE.

1. In the Devic.SEL function, use the Selector to highlight
and select the desired channel to the right of GEAR, FLAP,
AUX2, AUX3, AUX4, AUX5, AUX6 or AUX7.

Switch Assignments

To Change One or More Switch Assignments:

The 12X provides the ability to activate, inhibit or program

channel 5 (Gear), channel 7 (Aux2) and channel 8 (AUX 3) to
operate as a Governor, Gyro or Pitch function.

Note: Inhibiting a channel is necessary when auxiliary
channels are used as dual primary flight controls, such

as using 2 channels/servos for 2 Ailerons or 2 servos/
channels to operate the Elevator or Rudder. In this

instance, the auxiliary channels are no longer to be
operated by their auxiliary switches but rather by the

Elevator and Rudder sticks and must be inhibited in the

Device Select function.

Note: If any of the channels identified above are to be

used as a 2nd channel for a primary flight control (AILE,
ELEV, RUDD, FLAP), then be sure to Inhibit (INH) the

switches for the channels in this function or they will not
be available to use as a second control channel.

1. If GEAR, FLAP, AUX2, AUX3, AUX4, AUX5, AUX6 or AUX7

are to be used as a 2nd primary flight control, then inhibit

the corresponding switch by highlighting ACT along the
right side of the display; press the roller to select INH.

Activate/Inhibit Channels

Note: When SYS appears next to FLAP, the FLAP SYSTEM

function will appear in the FUNC.LIST (described later).

If the aircraft is equipped with flaps, or equipped with
Flaperons that are actually going to be used as flaps then

SYS should be set next to FLAP.

Note: When GYR appears, the Gyro Function will appear
in the FUNC.LIST (described later on page A-38). Two

gyro programs are available.

Note: When GOV appears, the Governor Function will
appear in the FUNC.LIST (described later on page A-38).

Flight modes must be active for this function to be
available.

Note: When PIT appears, the Pitch Function will appear in
the FUNC.LIST (described later on page A-55).

2. Once a switch is selected, a list of available switches is

graphically displayed. Highlight and select the desired
switch with the Selector.

3. Repeat for as many switches as desired.

A-27

The Wing Type function provides for 4 different wing types

(NORMAL, FLAPERON, DELTA and 4- Aileron).

NORMAL wing type is used when only the Aileron channel is

to be used to control ailerons, either with 1 servo, or multiple

servos connected through a Y-harness to the aileron channel.

FLAPERON is typically used when each Aileron is controlled by

a separate servo that is on separate channels and there are no

other flaps on the aircraft. Setting the wing type to FLAPERON
also makes available the Aileron Differential and Elevator-to­Flap mixing functions in the FUNC.LIST (described later).

DELTA is used with Delta wing aircraft (also referred to as
Elevon). With Delta wing type the Ailerons and elevator are

mixed giving roll and pitch control for Delta wing airplanes.

4-AILERON is used in aircraft where two servos are used to

operate the right aileron and two servos are used to operate the
left aileron. In this configuration each servo is independently
adjustable for sub trim and travel adjust. A balance function is

also available (page A-38) that allows the servo output to be

matched throughout its travel preventing binding due to linkage
geometry inaccuracies.

22: Wing Type

Wing Types

V-Tail Mix

V-Tail The Wing Type function provides programming for
aircraft that have a V-Tail configuration where the 2 tail control
surfaces are used for both Elevator and Rudder control.

Wing Type allows Dual Aileron, Dual Elevator, Dual Rudder

and Dual Flap functions to be activated. This function is
used when two servos are used to drive the primary control
surfaces allowing the independent adjustment of for sub
trim and travel adjust of each channel. A balance function is

also available (page A-38) that allows the servo output to be

matched throughout its travel preventing binding due to linkage
geometry inaccuracies.

Note: To access Dual Flaps it is necessary to assign the

Flap to SYS (system) in Device Select. When Dual Flaps

are activated, Aileron-to-Flap mixing becomes available in

the function list (page A-54).

Dual Flight Controls

Dual Control Functions

Note: Dual ailerons is a very important commonly used

function because a large number of sport and aerobatic
aircraft use 2 servos and 2 channels to operate the
Ailerons, providing the ability to utilize Aileron Differential
and to allow precise independent adjustment of sub trim
and travel adjust for each aileron.

If the aircraft has flaps that are separate from the Ailerons,
the Dual aileron wing type and (activating dual flaps) is
recommended.

The Wing Type function contains the Twin Engine (Twin E.)

feature, which allows for setting up a 2nd throttle channel for
a second engine, complete with its own independent sub trim,
travel adjust and separate trims and throttle curves.

Twin Engine Control

A-28

1. Highlight and select Wing Type in the System Mode List

using the roller.

2. Use the roller to highlight Wing then select the wing type

that is appropriate for your aircraft.

Normal- If the Aileron channel only is used to control both
ailerons, either with a single servo or with 2 servos connected

together via a “Y” harness, then the NORMAL wing type should
be selected. Also use NORMAL if the aircraft has flaps that are
separate from the ailerons; if two aileron channels are used,

activate the Dual aileron channel listed below.

Flaperon- If 2 channels are to be used to control the Ailerons

and the aircraft does not have separate flaps, select FLAPERON
as the wing type. Plug the right Aileron into the Aileron channel
(Ch2) and plug the left Aileron servo into the FLAP or AUX1
channel (Ch6) of the receiver

Wing Type

To Program a Wing Type

Note: If the ailerons are not going to actually be used

as flaps, inhibit the FLAP Switch and FLAP TRIM in
the Devic.SEL function in the SYSTEM Menu. This will
eliminate having a severe out-of-trim condition if the FLAP
Switch or FLAP TRIM is accidentally moved.

DELTA- If you have a Delta wing aircraft then select DELTA in

wing type. This will mix the aileron and elevator functions to

provide roll and pitch control for these types of aircraft. Plug the
right control surface into the aileron channel (CH2) and plug
the right surface into the elevator channel (CH3).

4-Aileron- If your airplane is equipped with two servos for the
right aileron and two servos for the left aileron, then select the
4- Aileron option. Right aileron servos plug into channel 2 and

channel 7. Left aileron servos plug into channel 5 and channel

8. Each servo is independently adjustable for sub trim and

travel adjustment and the digital trim is active for all servos.

A-29

V-Tail

1. If the aircraft has a V-tail configuration, highlight INH next
to V-tail in the Wing TYPE function and press the roller
until ACT appears. Plug the right Elevator servo into the
Elevator channel (Ch3) and plug the left Elevator servo into
the Rudder channel (Ch4).

Dual Channels

1. To assign a 2nd channel to Ailerons, Elevator, Rudder or

Flaps, highlight and select INH under the desired channel

on the Mate line of the Wing TYPE display and a list of

available channels is displayed.

Note: Channels/Switches must be inhibited (INH) in the
Devic.SEL function before they will appear in the list as an
option to be used as a Dual channel. The Flap SYS must
be selected in the Deivc.SEL screen to access the Dual

Flap function.

2. Highlight and select the channel that is to be the Mate

(slave) to the control channel represented above it. Plug the

2nd control surface servo into the channel selected as the
Mate.

3. INH will appear on the Trim Line of the display directly

beneath the channel just selected. This means that the

corresponding digital trim (FLAP TRIM or AUX TRIM)
located next to the FLAP and AUX2 switches can be used

as additional trims. However, the additional trims do not
function in the same fashion as regular trims. Instead,
they trim the controls such that both channels move in the

same direction – like reflexing both Ailerons or in the case
of Elevator halves, the Elevators would move in opposite

directions. As a result, these additional trims should remain
inhibited unless there is a special need for them. If changed

to ACT, the corresponding trim switch (Right Trimmer
or Left trimmer) will become active. If set to INH these

additional trim switches are inactive. Normal trims continue
to work regardless of the settings.

A-30

The Function Mode contains programming that is used to
complete the setup and then to adjust the aircraft’s flight
characteristics. Functions include Servo Reversing, Travel

Adjust, Dual Rate and Expo, Sub Trim, Servo Speed,
Programmable Mixes, Trainer and Timer functions, etc. Many

of these functions are frequently used to adjust the flight
characteristics during setup and at the field.

Function Mode

To Enter the Function Mode List

With the transmitter on Press LIST and the Function list will

appear.

If the aircraft is equipped with twin engines, the Twin Engine
feature (Twin E.) may be used for a 2nd throttle channel with an

optional separate digital trim.

1. Highlight and select INH next to Mate under Twin ENGIN.

A list of available channels will appear. Select the desired

channel to be used as the second throttle channel. Plug the
Left engine throttle servo into the channel selected as the
Mate. Plug the Right engine throttle servo into the throttle
channel (Ch 1).

Twin Engine

2. If the second throttle channel is to be trimmed using either
the normal throttle trim lever or a separate trim lever,

highlight and select INH next to Trim under Twin E. causing
the setting to change to ACT. When set to ACT, the 2nd

throttle servo can be trimmed with the normal throttle trim.

A-31

Travel Adjust allows the independent adjustment of servo travel
for each direction of servo travel.

12: Travel Adjust

1. Highlight and select TRVL ADJ. in the FUNC.LIST to obtain

the Travel Adjust display.

2. Use the Selector to highlight and select each channel and

adjust the travel in each direction by rotating the Selector.

The direction of travel is changed by moving the stick/
switch/lever in the desired direction to highlight L/R, U/D
or +/-.

To Program Travel Adjust Values

The servo reverse screen allows the direction of each servo to
be selected.

11: Servo Reversing

1. Highlight and select REV.SW in the FUNC.LIST to obtain the

servo reversing display.

To Program Servo Reverse

2. Use the Selector to highlight and select those channels
that need to be reversed. Pressing the Selector toggles the

channel between Normal and Reverse.

A-32

Three dual and exponential rates are available and are selectable
via flight modes or selected switches.

1. Highlight and select D/R & EXP in the FUNC.LIST to obtain
the Dual Rate and Exponential display.

2. Highlight and select the desired channel (Aileron, Elevator
or Rudder), noting that 3 sets of values will be displayed for
each channel – Aileron, Elevator and Rudder.

13: Dual Rate and Exponential

Note: The Dual and Exponential rates can be combined

and assigned to each of up to 5 flight modes. Flight modes

must be activated in Device Select (see page A-21) to

access the Auto D/R and Expo function allowing dual rates

to be automatically selected in each flight mode.

1. Highlight and select D/R & EXP in the FUNC.LIST to obtain
the Dual Rate and Exponential display.

2. Flight Modes must be activated in Device. Use the roller to
select AUTO and activate the auto function.

3. Highlight and select the desired channel (Aileron, Elevator
or Rudder), noting that 3 sets of values will be displayed
if three flight modes are active and 5 sets of values will be
displayed if 5 flight modes are active for each channel.

To Program Dual Rate and Exponential Values

To Assign D/R and Expo Values to Flight Modes

Assigning Dual and Expo Rates to Flight Modes

3. Use the Roller to select and change the desired D/R
and Expo values. Note that D/R and Expo values can be

independently adjusted by holding the corresponding
control stick in the desired direction while making
adjustments.

4. Use the Roller to select and change the desired D/R
and expo values. Note that D/R and Expo values can be

independently adjusted by holding the corresponding
control stick in the desired direction while making
adjustments.

Note: If extra flight modes are activated, up to 5 dual and
exponential rates are available. Dual and Expo rates are

independently adjustable in each direction by moving the
appropriate stick in the desired direction.

A-33

Use Sub Trims to fine-tune the output alignment of the servo

arms.

15: Sub Trim

1. Highlight and select Sub Trim in the FUNC.LIST to obtain

the Sub Trim Display.

To Program Sub Trim Values

The throttle hold function is normally used as a kill switch

for glow-powered airplanes or as a safety/ arming switch

for electric-powered aircraft. It can also be used to preset a
programmed throttle position for electric sailplanes to give full
power when the switch is activated. The throttle hold function

16: Throttle Hold

1. Highlight and select THRO Hold in the FUNC.LIST to obtain

the Throttle Hold Display.

2. Highlight IHN and press the roller to activate the Throttle
Hold function.

To Activate Throttle Hold:

switch position and direction is assigned in Device Select. The
programming of the throttle hold switch position is done in
Device Select screen in the System mode (see page A-21).

Note: Throttle hold is defaulted to the mix switch.

3. Highlight the HOLD Pos. and press the roller to allow
throttle hold positions to be adjusted. 0% = low throttle low
trim. 100% =full throttle.

Note: The currently selected Throttle Hold switch is

displayed under ACT. MIX SW is the default setting. To

select another switch see Device Select Throttle Hold on
page A-21.

2. Highlight and select the channels where the sub trims must

be adjusted. Once a channel is selected, rotate the Selector

until the servo arm is in the desired position.

A-34

Programmable throttle curves allow the throttle response (stick

position vs. throttle output) to be manipulated. This is useful to
optimize the throttle response for various maneuvers like torque

rolls. Programmable throttle curves can be adjusted with the
THRO CURV function. Two programmable throttle curves are

available.

If the Twin E. function has been activated in Wing Type (page

A-27 for twin-engine aircraft, independent throttle curves are
available for each engine to help eliminate discrepancies in rpm
between the two engines at all throttle positions.

18: Throttle Curves

1. Highlight and select THRO CURV in the FUNC.LIST. and
press YES or NO to access the throttle curve function. Two

different throttle curves can be programmed referenced to

as Pos0 and Pos1.

2. If there is a need to have 2 throttle curves, use the Selector

to highlight SW SELECT and a list of available Flight

Modes and switches appears. Select the Flight Mode(s)

(FM0, FM1, or FM2), switches and/or switch position
(SPS) that is desired to be used to select between the 2
curves. The switch will be used to select between the Pos0
curve and the Pos1 curve. Highlight and select Pos0 to
toggle between the Pos0 and Pos1, in order to display and

adjust the 2 curves.

Note: If Twin E. has been activated for a twin engine
aircraft, there will be a Pos0 and Pos1 for both the right

and left engines, providing a total of 4 possible throttle

curves. However, instead of being named Pos0 & Pos1,
they are named RTH.0, RTH.1, LTH.0, and LTH.1. They
represent Right Throttle Pos0 & Pos1 and Left Throttle
Pos0 & Pos1 respectively.

3. Highlight EXP and select it to turn exponential ON if

desired. This will result in a smoothed throttle curve.

4. Using the roller, highlight the desired point (L, 1, or H) and

press the roller to access the output value. Rotate the roller
to change the output value. Repeat for all desired points.
Note the graphic display will change to represent the new
point position.

5. To adjust access Pos1 throttle curve (only available when
SW is assigned to a switch) highlight Pos0 and rotate the
roller to access Pos1 and repeat the step above to adjust
Pos1 throttle curve.

6. To adjust the throttle trim authority, highlight the TRIM

using the roller and rotate to select a trim authority value of

0 100%. Note the graphic display will change to represent

the new trim authority.

7. To store a new point move the throttle stick until store
appears on the lower left side of the screen. When the
desired position is achieved press the store button and the

point will be stored onscreen. Up to eight points can be

stored.

9. THRO STK allows the throttle stick to be used to switch
from Pos0 throttle curve to Pos1 throttle curve. To program
a throttle curve Pos change with the throttle stick highlight
the THRO STK and adjust the values using the roller to

program the point at which the throttle curve is selected

between Pos0 and Pos1.

To Program a Throttle Curve

A-35

The 12X provides the ability to adjust the speed of servos on
each channel in each direction. The speed may be reduced
(servo slowed) from its normal speed but it cannot cause a

servo to move faster than its rated specifications. Each servo

can have 2 sets of speeds in each direction that are Flight Mode
or switch selectable.

The servo speed function can be very useful for scale models
with retractable landing gear and gear doors, since in many
instances the need for gear door sequencers can be eliminated.
If the gear door servos move at normal speed and the landing
gear servos move at a slower speed when the gear is lowered,
the gear doors will be open before the landing gear begins to
come down. In the opposite direction, if the gear door servos
move slowly and the landing gear servos move at normal
speed, the gear can retract before the gear doors begin to close.

Note: Many retract servos are non-proportional type
servos that simply move from end point to end point.
These types of servos are not adjustable in the servo
speed function.

24: Servo Speed

1. Highlight and select SRV. Speed. Speed FUNC.LIST.

2. Select SW SEL and press the roller to access Switch Select.

If only one servo speed is desired, then all selectable switch

positions in this screen should be P0. If two servo speeds

are desired, then assign the desired switch that will change

the servo speed to P1. Return to the main screen.

3. If a single set of servo speeds is desired, make sure the
display is showing Pos0. If it is not, select Pos1 and
change it to Pos0. Highlight and select the channel and
direction for each servo that is to be adjusted. Once a

direction for a servo is selected, the servo speed may be set

so the servo travels from .193 seconds for 60 degrees of
rotation to 16.4 seconds for 60 degrees of rotation. Adjust

the speed of each servo until the desired speed is obtained.

4. If 2 sets of servo speeds are desired that are Flight Mode

or switch selectable, one set of values is set to NORM for

all channels, and the slowing of servos can be turned off by

selecting the position (Pos0 or Pos1) that has the NORM
values. Highlight and select Pos0 and change it to Pos1

and then highlight and select the channel and direction for

each servo that is to be adjusted. Once a direction for a

servo is selected, the servo speed may be set so the servo

travels at the desired slower rate. Switch between Pos0 and
Pos1 to view and adjust the 2 sets of values for each servo.

Note: Pos1 always has priority over Pos0. In other words,

if multiple switches are selected and one of the switches

is in its Pos1 position, then all other switches are ignored
and the Pos1 values are in effect.

To Adjust Servo Speed

A-36

The 12X has a Snap Roll system that can combine the Snap

Roll switch with Flight Modes to select a direction (Right/
Up, Right/Down, Left/Up, and Left/Down) and the amount of
deflection for Aileron, Elevator and Rudder. Up to four directions
and corresponding rates can be programmed and a Direction/
Rate combination can be assigned to 1 or more of the 5 Flight
Modes. Pressing the Snap Roll switch causes the aircraft to

snap roll in the direction according to the rates assigned to the
Flight Mode that is currently selected.

A Snap Roll stick switch position (Stick SW) can be
programmed that will cause the respective control surface to
skew to the programmed snap roll position when the stick is
displaced beyond the programmed position.

Important: Use this function with extreme caution.

If Flight Modes have been activated, up to 5 Snap Roll
directions/rates can be assigned —one per Flight Mode. If
Flight Modes have not been activated then only one directions/

rate is available. The Snap Roll function is inhibited as a default
and must be turned on in order to use it.

31: Snap Roll

1. Highlight and select Snap Roll in the FUNC.LIST and then
select INH to activate a single snap roll or select S.ROLLØ
to activate up to 5 snap rolls assigned to Flight modes.

2. Scroll to the desired channel and set it to a desired value.

3. Repeat step 2 for the other channel’s directions.

4. If more than one snap direction/ value is desired Highlight
S.ROLLØ to access the snap roll 0 thru 4 and repeat the

above steps for each snap roll.

If the Snap Roll Function Is To Be Used

A-37

The 12X Aileron Differential function reduces the travel of the
Aileron that deflects downward without affecting the Aileron
that travels upward and, therefore, can eliminate adverse yaw
tendencies in rolling maneuvers.

Note: Differential is available in the FUNC.LIST only if
the FLAPERON, Delta or 4-Aileron is selected in the Wing
Type function in the SYSTEM Menu or a Dual channel has
been assigned to ailerons in the Wing TYPE function.

The Aileron Differential function provides for 2 differential

settings that are switch or Flight Mode selectable – Pos0 and
Pos1.

32: Differential

1. Highlight and select AIL Diff. in the FUNC.LIST to obtain

the Aileron Differential display.

2. If there is to be a single Aileron differential setting that is

on all of the time, highlight and select Pos0 and adjust

the desired percentage of differential. A positive value
causes the downward Aileron to travel less while a negative
value causes the upward Aileron to travel less (negative
differential).

3. If two differential values are needed, highlight SW SEL and

press the roller to select the desired switch(s) to select

between Pos0 and Pos1 differential settings.

4. Return to the Differential screen and make adjustment to the

POS 1 differential as desired.

Note: Pos1 always has priority over Pos0. In other words,

if multiple switches are selected and one of the switches

is in its Pos1 position, then all other switches are ignored
and the Pos1 values are in effect.

To Use the Aileron Differential Function

A-38

The 12X features a Balance function that allows the servo

outputs of dual channels to be adjusted throughout the range.
This is useful when two servos are used to drive a single
surface (i.e. two aileron servos used to drive one aileron) and
the linkage geometry of each servo is slightly different (typical
with a tapered aileron). If both servos are mixed in a linear
fashion, binding will occur throughout the control range due

to linkage geometry inaccuracies. The Balance function allows

the servo output of the master servo to be adjusted at 7 points
throughout the range, compensating for any linkage geometry

inaccuracies. Think of Balance as a curve mix that allows the

master channels to be independently adjusted at seven different
points, allowing a perfect bind-free setup throughout the control
stroke.

Note: Balance is available in the FUNC.LIST only if the
FLAPERON, Delta or 4-Aileron is selected in the Wing

Type or if any of the dual functions (i.e. dual elevator, dual
rudder etc.) is activated in Wing Type.

33: Balance

1. Highlight and select Balance in the FUNC.LIST to obtain the
Balance display.

2. Note that the Balance screen will display the functions

that a programmed in the Wing Type. If Flaperon only is
programmed only one aileron column will appear in the
balance screen. If 4- ailerons are selected then two columns
will appear in the balance screen. This also applied to the
dual elevator and rudder functions.

3. Using the roller highlight the desired position and press

the roller to access the value. Rotate the roller to change

the output position that is selected. The range is +100 to

-100. Repeat this for all positions until no binding occurs
throughout control travel.

To Program the Balance Function

A-39

The 12X features a Gyro Gain system that allows in-flight

selection of 3 gyro gain settings for up to two separate gyros

or up to five gyro gain settings assigned to flight modes. The
system provides for fixed gain values and has settings for
normal or tail lock gyros. Gyro gains can be assigned and
selected via a three-position switch or with Flight Modes.

Note: If one set of gains for a gyro is set to 0%, (in

normal gain mode)then the gyro can be switched off
during flight.

Note: In order for the GYRO System to appear in the
FUNC.LIST, the AUX2 and/or the AUX3 channels must be
set to GYRO in the Devic.SEL screen.

Note: This function is designed to be used only with gyros
that have in-flight proportional gain adjustment capability.
Single and dual rate gyros that use a potentiometer to
adjust the gain will not work with this function.

44: Gyro Sensor

Plug the gain connector of one gyro into the AUX2 port of the
receiver. Plug the gain connector of another gyro (if used) into
the AUX3 of the receiver. If only one gyro is to be used, connect
its gain to either AUX2 or AUX3.

1. Highlight and select GYRO SENS. in the FUNC.LIST.

2. Highlight MANUAL then decide which switch to use to
control gyro gain. Highlight and select AILE D/R, ELEV D/R,
FLAP SW, AUX@ or AUTO (for flight mode).

3. Two types of gyro adjustments are provided, Normal and
Tail Lock. Highlight and select the desired type of gyro

that will be used. If heading lock is selected, note that a T
or N is available for each gain setting. If T is selected, all
values will result in the gyro being in tail lock mode. If N is
selected, all values for that gain will be in normal mode.

Note: For most airplane applications normal mode is

recommended. Also note the Time Lag is available in Tail

lock mode. Time lag is available when switching from tail
lock to normal mode to prevent the servo attached to the
gyro from jumping abruptly when switching from tail lock
to normal mode.

4. Each gyro has 3 available gain settings (or up to five if extra
flight modes are selected). They are labeled Pos0, Pos1,
Pos2, Pos3 and Pos4 with a percentage next to each. They
correspond to the positions of a 3-position switch where
0 represents the switch being in the upper position; 1
represents the middle position; and 2 represents the lower

position.

5. Use the Selector to highlight and select the number 0

position for each gyro and set the percentage to the desired
gain value.

6. Select the number 1 gain for each gyro and set it to the

desired value.

7. Select the remaining gain values.

Gyro Connections

Note: The Devic.SEL function must be programmed to

GYR, GEAR, AUX2 and/or AUX3.

Gyro Gain

To Access the Gyro Sensor

A-40

The 12X features a Governor program that can be activated in
the Device Select screen. The Governor program is designed to
be used with most currently available Governor systems, and
allows for independent rpm settings for each of the active flight
modes.

Note: Flight modes must be activated in Device Select to
access the governor screen.

45: Governer

1. In the Devic.SEL function use the Selector to highlight
under OUT the GEAR, Aux 2 or Aux 3 channel. GEAR, Aux
2 or Aux 3 must be programmed to GOV in order to access

the governor function. The Governor program will now be

visible in the Function Mode List.

1. Highlight and select Governor in the FUNC.LIST.

2. Highlight the desired flight mode and adjust the value using
the selector. Repeat this for all flight modes.

To Activate the Governor Screen

To Access the Governor Screen

A-41

The 12X features a preprogrammed Aileron-to-Rudder mix. This
mix causes the Rudder to deflect when the Ailerons are moved.
This is useful for some types of aircraft that have adverse yaw,

(right aileron results in a left yaw). By programming aileron

to rudder mix in the same direction the airplane will make
coordinated turns using ailerons only.

1. Highlight and select AILRUD M in the FUNC.LIST to

obtain the Aileron-to-Rudder mix display.

2. There are 2 sets of mixing values available – Pos0 and
Pos1. If the Pos0 values are left at 0% then the mixer may
be turned on and off – Pos0 would be off and Pos1 would
be on (this can be reversed by leaving the Pos1 values at
zero and putting values into Pos0). Highlight and select L
next to Pos1 and set the value to give the desired amount of
Left Rudder. A negative value will reverse the direction.

3. Highlight and select R next to Pos1 and set the value to

give the desired amount of Right Rudder. A negative value
will reverse the direction.

62: Aileron to Rudder

4. Scroll down to the bottom line of the display to select the

Flight Mode and/or switch(s) that is to be used to turn

the mixer on and off. The example below shows Flight

Mode 2 set to Pos1, turning on the Aileron-to-Rudder mix.

The throttle may also be used to turn the mixer on and

off by highlighting and selecting THRO STK and setting

the percentage of throttle to the point where the mixer is

switched on/off.

Note: The Pos0 values can also be set to something other

than zero causing a different amount of Rudder deflection

to occur when there is Aileron input. One or more switches

can then be selected to switch between the two sets of
values. With this setup there will always be some mixing,

as indicated by either Pos0 or Pos1, and the mixing

cannot be turned off.

To Program Aileron-to-Rudder Mixing

A-42

The 12X features a preprogrammed Elevator-to-Flap mix.

The mixer causes the Flaps (or Flaperons) to move when the

Elevator is moved, resulting in tighter looping maneuvers, or
to provide some Aileron reflex for some 3D maneuvers such as

Harriers. Typically, the flaps are set to travel downward with up

Elevator and to travel upward with down Elevator. The direction
that the flaps travel with Elevator input can be changed by using

positive and negative values.

1. Highlight and select ELEFLP M in the FUNC.LIST to
obtain the Elevator-to-Flap mix display.

2. There are 2 sets of mixing values available – Pos0 or Pos1.
If the Pos0 values are left at 0% then the mixer may be
turned on and off – Pos0 will be OFF and Pos1 will be ON
(this can be reversed by leaving the Pos1 values at zero
and putting values in Pos0). Highlight and select DN next
to Pos1 and set the value to give the desired amount of
Flap travel in the Down direction when full Up Elevator is

applied.

3. Highlight and select UP next to Pos1 and set the value to
give the desired amount of Flap travel in the UP direction
when full Down Elevator is applied.

4. Scroll down to the bottom line of the display to select the

Flight Mode(s) and/or switch(s) that is to be used to turn

the mixer on and off. The throttle may also be used to turn

the mixer on and off by highlighting and selecting THRO
STK and setting the percentage of throttle to the point where
the mixer is to switch between On and Off.

63: Elevator to Flap

To Program Elevator-to-Flap Mixing

A-43

The 12X features a Rudder to aileron/ elevator mix that is used

to eliminate roll and pitch coupling when rudder is applied.
Two mixes are available and independent mix values can be

assigned for each direction. Various switches and flight modes
as well the throttle stick and other stick positions (SPS) can be
used to select either of the mixes. If one of the mixes has a 0%

value then selecting that mix will turn off the mix.

1. Highlight and select RUDD- A/E in the FUNC.LIST to obtain
the Rudder to Aileron/ Elevator display.

2. Scroll to the desired value (aileron or elevator, right or left,
position 0 or 1) and press the roller to select that value.
Rotate the roller to program the desired mix value. Note
that positive and negative values are available to reverse the
direction of the mix.

Note: If a mix value is desired to always be active (on),

then program that mix value in Pos0 and leave all switches
set to Pos0.

3. To select the desired switch, flight mode switch position or
throttle position that will activate mix value Pos0 and Pos1,
highlight the desired switch and choose 0 or 1. Note: Pos1
has priority over Pos0.

64: Rudder to Aileron/Elevator Mix

To Program the Rudder-to-Aileron Mix

A-44

The 12X features a three-position Flap System with Elevator
compensation, programmable Delay, and an Auto Land feature.

Its purpose is to allow the flaps to be programmed to three
different positions, normally full flap, half flap and no flap or
fully retracted position.

Note: The Flap System is available in the FUNC.LIST only
if SYS. is selected on the OUT line next to FLAP in the
Device. Select function in the SYSTEM Menu.

Because flaps generally causes a change in pitch (Elevator
trim), the Flap System provides for setting an Elevator deflection
for each flap position. This is called Elevator Compensation.

There is also a programmable Delay in .1-second increments
up to a maximum of 2 seconds. The Delay determines how long

it takes for the Flaps and Elevator to reach their positions. This
delay function insures that the Flaps and Elevator reach their

positions at the same time resulting in smooth Flap deployment
and retraction with minimal pitch change.

The Auto Land feature, if implemented, automatically retracts
the Flaps and Elevator compensation when the throttle is raised

above a specified throttle position. This can be useful during
a missed landing approach when a go-around is required. The
Flap System allows the Flaps to be deployed using the Flap
Switch, Flight Mode switch or a combination of both.

66: Flap System

1. Highlight and select FLAP SYS. in the FUNC.LIST to obtain

the Flap System display.

1. If Auto Land is to be used, scroll to INH under AUTO LAND
and select it with the Selector. INH will change to ACT when
selected and toggles between ACT and INH each time the

Selector is pressed.

2. Scroll down to THRO and press the Selector to show the

throttle percentage. Rotate the selector until the throttle

percentage (0–100%) is equal to where the Auto Land
feature is to retract the Flaps and Elevator compensation.

It is recommended that the throttle position be set very high at

first (between 90–99%) to give the aircraft a chance to regain

some speed before the Flaps actually retract. As the Flaps
retract, lift will decrease and the stall speed of the aircraft will
increase and may cause a crash if the airspeed is too low. When
there is a missed approach, advance the throttle slowly up to

about 90% and wait until the aircraft picks up some speed

before advancing the throttle to full, causing the Flaps to retract.

To Program the Flap System

A-45

The FLAP values correspond with how far the flaps deflect when
in the NORM, Mid, and Land positions. Generally the NORM

position represents normal flying where the flaps are fully
retracted. The Mid position is typically used for half flaps and

the Land position is typically used for full flap for landing.

1. With the Flap switch in its uppermost (Normal) position (no

flaps deployed), scroll to the NORM parameter under FLAP

on the display. Select the value with the Selector and adjust
its value to bring the flaps to their normal flying position
(no flaps deployed).

2. With the Flap switch in the mid position, scroll to Mid

under FLAP on the display and select it. Adjust the desired

percentage to deflect the flaps the desired amount.

3. Put the Flap switch in the lowermost Land position. Scroll
to Land under FLAP on the display and select it. Adjust the

percentage to deflect the flaps to the desired position.

The Delay feature determines how long it takes for the flaps

and Elevator to reach their positions. When the delay function

is programmed, The 12X automatically times the Flaps and

Elevator so that they reach their positions at the same time,

resulting in smooth Flap deployment with minimal pitch
change. The Delay is adjustable in .1-second increments up to
a maximum of 2 seconds.

1. Highlight and select Delay in the Flap System display using
the Selector. Then use the rotary to select a delay between
.1- second and 2 seconds.

Delay

Flap

ELEV – Elevator Compensation

The ELEV values represent the Elevator deflection that will occur

when the Flaps are deployed to their various positions. Some
trial and error will be required to arrive at the exact values, but
once properly adjusted, the aircraft will assume the proper pitch
attitude for all flap positions.

1. Adjust the Elevator compensation values (ELEV) to the

desired values for each switch position as per the flaps
above.

Flight Modes

If Flight Modes have been activated in the Device SEL function,
then FM0, FM1 and FM2 (and 3 and 4 if extra was activated)

will appear along the right side of the Flap System display to

represent the 3 Flight Modes. Each of the Flight Modes can
be assigned one of the Flap values (NORM, Mid, or Land),

so when that Flight Mode is selected during flight, the Flaps
deploy to that position. SW is also an option. When SW is
selected for a Flight Mode, flap operation is controlled by the
Flap switch when in that Flight Mode.

If Flight Modes have not been activated, skip this portion of the
Flap System.

1. For each Flight Mode, highlight and select FM0-FM2 and

select either a flap position (NORM, Mid, Land) that the

flaps are to assume when in that Flight Mode, or select SW
if the Flap switch is to control the flaps when in that Flight
Mode.

A-46

51 thru 58: Programmable Mixers

Programmable mixers are programmed to cause a second

or slave channel to react as a result of providing input to
the primary or master channel or to cause a channel to be

controlled by moving a switch or lever. Programmable mixes

are typically used to activate special aircraft functions like
smoke systems, speed brakes, steerable nose gear, bomb drops,
idle-up, etc. or to alter flight characteristics, for example down
elevator at low throttle for aerobatic aircraft such that the aircraft
tracks perfectly on the down lines at low throttle.

The 12X provides 3 Standard programmable mixes (PROG.
MIX1 - PROG.MIX3) and 5 Multi-Point or Curve programmable
mixes (PROG.MIX4 - PROG.MIX8). Multi-Point (or Curve)

Mixing provides the ability to program a customized curve that
the Slave channel will follow as it reacts to the Master channel’s

input. Multi Point mixes are different from Normal Mixes in

that Normal Mixing results in a linear movement of the Slave

channel in relation to the Master. With Multi-Point Mixing there
are up to 8 points that can be adjusted to control the position

of the Slave channel, providing the ability to custom tailor the
output of the slave channel.

The primary channel is called the Master channel, while the
channel that reacts to the Master is called the Slave channel.

Mixes are fully programmable, allowing any of the 12 channels
to be Master, Slave or both (a channel can be mixed to itself).
Trimmers and levers can also be used as a master and are

extremely useful for programming proportional channel to be
operated via a trimmer or lever. Additionally programmable
mixes can always be on, or turned off and on via a programmed

switch, Stick position or flight mode. The Snap Roll/ Trainer,
switch (momentary switch SNPT) can also be programmed as

the Master channel.

If dual functions have been activated in the Device Select

screen, the following slave channels are available: AILV, FPRN,
FROL, and RUDV, these functions allow the ailerons to be

moved as flaps, flaps to be moved as ailerons, elevators to be
moved as ailerons, rudders to be moved as speed brakes, both
in or both out..

Additionally there are 2 options for Master channels:

“#” (pound sign), these Master channels are Origin type mixes.
These include #THRO #AIL, #ELE, and #RUD. Origin mixing

bypasses any other mixing that might affect that channel,
such as throttle curves, exponential, travel adjust or other
programming, and uses the stick position only to control the
mix.

“+” sign, these Master channels are trim include type mixes.
These include THR+, ELE+, AIL+, and RUD+. Trim Include

mixes include the trim of the Master channel as well as any
other mixing to the Master channel to control the Slave channel
of the mix.

The 12X has 3 standard programmable mixers that allow for

linear mixing of a Master channel to a Slave channel. The

standard mixers are PROG.Mix1, Mix 2 and Mix 3.

These mixes provide for 2 sets of mixing values named Pos0
and Pos1. If one set of values is set to 0% then the mixer can
be turned On and Off with a stick, switch or lever. Each set of

mixing values is comprised of 2 percentages to accommodate
movement of the Master channel in both directions. This is
shown in the illustration below where there is an upper and

lower percentage for both Pos0 and Pos1.

Standard Programmable Mixer - (Std. Prog Mixer)

A mix can be made to always be on by setting Pos0 values only
and not selecting any switches to switch between the Pos0 and
Pos1 values.

A-47

The Master channel is the primary or controlling channel. The

default for both the Master the Slave channel is THRO. The

Master channel is selected by highlighting and selecting this
parameter to obtain a list of channels and then selecting the
Master channel from the list.

Note: There are 4 channels that appear more than once.

They are Throttle, Aileron, Elevator and Rudder. Since

these channels can be influenced by Dual Rate and

Exponential settings, they are included in the list twice

- once where the D/R and EXP settings are in effect and
again where the D/R and EXP settings are ignored. The

second time they are listed, there is a special designator to
indicate that these channels can also be used as a Master

while bypassing any Dual Rate and Exponential settings

that may be associated with them. They are designated

by “#” (pound sign) in front of the name - #THRO, #AILE,
#ELE, and #RUD. When one of these channels is selected
as the Master, all D/R, EXP and Curve settings associated

with the Master are ignored during the mixing operation.
Instead, the mixer reads only the physical position of the
stick to perform mixing.

A (+) behind the channel indicates a trim include function. By
selecting a channel with the (+) the trim lever affects both the

master and slave channels.

Note: Some programmable mixes have + appearing after

a specific channel and other mixes have # before that

specific channel. Choose the programmable mix that offers

the type of mix (origin of trim include) that you desire.

Master Channel - (Std. Prog Mixer)

A-48

The Slave channel is the secondary receiving channel and will
move according to the program mix in relation to the Master
channel. The default for both the Master the Slave channel is

THRO.

The Slave channel is selected by highlighting and selecting
this parameter to obtain a list of channels and then selecting
the Slave channel from the list. The list contains each of the 12

channels in the system and CANCEL.

The right side of the Programmable mix screen displays the

available switch options. If you choose to have a switch control

the mix, either on/off or have two mix values, highlight and
select the desired switch(s) and select position 0 or 1. Each
standard programmable mixer has two positions - Pos0 and
Pos1 and each position has 2 percentages (upper and lower)

to accommodate mixing when the Master is moved in both

directions. Note that Pos1 has priority over Pos0.

Slave Channel - (Std. Prog Mixer)

Switch Position

A-49

Offset defines the position where the mixer changes directions.
The Offset is defaulted to center position or 0 and this is most
commonly used. With a 0 Offset, if the Rudder is the Master,

moving the rudder stick to the left of center causes a mix in one
direction while moving the rudder stick to the right of center
causes a mix in the other direction. Directions correspond to the

upper and lower percentages for Pos0 and the upper and lower
percentages of Pos1. The amount of mix and actual direction
that the slave moves is determined by the Pos0/Pos1 values.
The Offset applies to both Pos0 and Pos1 settings.

The Offset may be changed by highlighting and selecting
Offset and adjusting either a positive (+) or negative (-) value.

A positive percentage moves the offset in one direction from

center while a negative percentage moves the Offset in the other

direction from center.

Each standard Programmable mixer can have two sets of mixing
values - Pos0 and Pos1. Each set can have 2 percentages which

control movement of the slave when the master is moved in
each direction. A switch can be selected to switch between the

Pos0 and Pos1 percentages.

The Pos0 settings determine how far, and in which direction,

the slave channel moves when the master is moved above and

below the Offset (the Master moving in both directions) when
the switch is in a position to select the Pos0 values.

To enter Pos0 values, highlight and select Pos0, move the

Master channel control (stick, lever or switch) in one direction
and set the percentage and then move the Master channel
control in the other direction and set its value

The Pos1 settings are identical to the Pos0 settings and

determine how far, and in which direction, the slave channel
moves when the master is moved above and below the offset
(the Master moving in both directions) when the switch is in a

position to select the Pos1 values.

To enter Pos1 values, highlight and select Pos1, move the

Master channel control (stick, lever or switch) in one direction
and set the percentage and then move the Master channel
control in the other direction and set its value.

Offset

Mix Values

A-50

Note: Pressing the CLR button while a modifiable

parameter is selected will reset the parameter to its default

value. Pressing the CLR button when either the Master or

Slave is highlighted Inhibits the entire mixer and it is no
longer functional.

There are 5 Multi-Point Programmable Mixers in the 12x, Prog.
Mix4 thru Prog.Mix8. They differ from the standard mixes in

that they allow non-linear mix response from the Master to

the Slave. This is possible because the mixer uses up to 8

points to define the position of the slave channel relative to the
Master channel at up to eight selectable points. As the Master
reaches each point, the Slave response position can be defined
independent of other point settings.

The Master channel is the primary channel, lever or trim lever.
The Master channel is selected by highlighting and selecting
this parameter to obtain a list of channels and then selecting the
Master channel from the list.

There are 4 channels that appear more than once. They are

Throttle, Aileron, Elevator and Rudder. Since these channels
can be influenced by Dual Rate, Exponential, and Throttle Curve

settings, they are included in the list twice - once where the

D/R and EXP settings are in effect and again where the D/R
and EXP settings are ignored. The second time they are listed,

there is a special designator to indicate that these channels can
also be used as a Master while bypassing any Dual Rate and

CLR Button - (Std. Prog Mixer)

To Inhibit a Mix

Highlight either the Master or Slave and press the CLR button

to completely disable a mixer.

Multi-Point Programmable Mixer

Master Channel

Exponential settings that may be associated with them. They
are designated by “#” (pound sign) in front of the name - #FLP,
#AIL, #ELE, and #RUD. When one of these channels is selected
as the Master, all D/R, EXP and Curve settings associated with

the Master are ignored during the mixing operation. Instead, the
mixer reads only the physical position of the stick to perform
mixing.

A (+) behind the channel indicates a trim include function. By
selecting a channel with the (+) the trim lever affects both the

master and slave channels.

A-51

This is the Slave channel that will move according to the
program mix in relation to the Master channel.

The Slave channel is selected by highlighting and selecting
this parameter to obtain a list of channels and then selecting
the Slave channel from the list. The list contains each of the 12
channels in the system.

The points that can be adjusted are listed vertically by name and
are also displayed by number along the bottom of the graph.

Change the value of a point by highlighting and selecting the

point name and dialing-in the desired percentage.

This list shows the setting for each of the 8 adjustable points
(Point-L, 1, 2, 3, 4, 5, 6, 7, H). The value of each point

determines where the point is positioned vertically on the graph,
which dictates the Slave servo position relative to the master.

The point values can be set from -100 to +100. A value of 0

indicates the Slave’s center or neutral position. The overall
travel of the slave channel is affected by the Travel settings

described in the TRVL ADJ. function.

The value for a point can be changed by highlighting and

selecting the Point Name to the left of the point value and then

dialing-in the desired value.

Pressing the CLR button when a point value is highlighted

resets the point to original settings. The original settings are:

The Vertical line on the graph shows the current Master channel

position. When the Master channel is deflected fully in one

direction, the line is to the extreme left over Point-L, when it is
at neutral it is in the center over Point-1, and when it is fully

deflected in the other direction, the cursor is at the extreme right

of the graph over Point-H. Where the vertical line intersects
the Curve/Line over a given point defines Slave servo position,

which is equal to the value assigned to that point.

Slave Channel

Point Names/Numbers

Current Point Setting

Vertical Line

A-52

The graph illustrates the mixing curve. The X-Axis (horizontal

plane) represents Master channel movement. The Y-Axis

(vertical plane) represents the Slave servo movement where the

bottom 1/2 of the graph is one direction from neutral and the

top portion of the graph is the other direction.

Multi-Point Programmable Mixer

Graph

Points That Can Be Added and Adjusted

Curve mixes are defaulted to three points (L, 1 and H). Up to

five additional points can be added. To add a point, move the
master channel in the desired position until STR appears on the

left bottom of the screen. Pressing STOR will store a new point

at that position.

Exponential

The Exponential function blends the Curve between the points

on the graph to provide a smooth response. The default value is

OFF. To turn it on and smooth the mixing curve, highlight and
select OFF and it will toggle to ON.

Slave Channel Position

The Slave servo position next to OUT at the bottom left of the
display is expressed in values from -100 to +100, with 0 being

neutral or center. It represents the servo travel that corresponds
to the present Master channel position.

Master Channel Position

The Master channel position is shown on the bottom line of the
display next to IN and is expressed in values from 0 to 100 with

50 being the center or neutral position. It represents the present

Master channel position.

Note: To eliminate a point press ERAS (bottom left of the

screen) when the point is highlighted.

A-53

There are numerous switches that can be used to switch

between the Pos0 and Pos1.

Note: If the upper and lower settings for Pos0 or Pos1
are left at 0% the mixer can be turned on and off with

the switch. In addition, if Flight Modes are activated in

the Devic.SEL function, then flight mode switches may

be selected. Also Switch positions can be used to select

between Pos0 and Pos1.

Pressing the CLR button while a modifiable parameter is

selected will reset the parameter to its default value.

Note: Pressing the CLR button when either the Master or

Slave is highlighted inhibits the entire mix.

Switch Select

CLR Button

LIST Button

Press the LIST button to return to the FUNCTION List, or rotate
the rotary selector until L.S.T. appears next to LIST and select it
to return to the SYSTEM Menu.

ENT Button

TO Inhibit a Mixer (turn it off entirely)

Pressing the ENT button returns to the Main Display.

Highlight either the Master or Slave and press the CLR button

to completely disable a mixer.

To select a switch that will switch between the Pos0 and Pos1

values, highlight and select the switch name and it will toggle

between Pos0 and Pos1.

A-54

Aileron-to-Flap mix causes the flaps to move in unison with
the ailerons. This function gives added roll response by mixing
ailerons to flaps such that the entire trailing edge functions as
an aileron.

Note: This function is only available when Dual Flap is
assigned in the Wing Type function.

To access Aileron-to-Flap mix, in FUNC.LIST rotate the Selector
until AILFLP M is highlighted. Press the Selector to access

the Aileron-to-Flap mix.

Note: Two Aileron-to-Flap mix values are available—Pos0
and Pos1. Switches are available at the right of the screen
that allow the selection of Pos0 or Pos1.

Note: Position 1 always has priority over position 0. Press
the LIST button to return to the Function Mode screen.

67: Aileron-to-Flap Mix

A-55

The Pitch Curve is used to control variable pitch propellers.
The Pitch function works nearly identically to a programmable
curve mix, allowing up to 8 points to be stored and adjusted
throughout the curve. Two curves are available (Pos0 and Pos1)

and are selectable with various switches, flight modes, throttle

position or Stick positions (SPS). An Exponential function is
available that smooths the pitch curve. Pitch must be assigned
to Gear, Aux2 or Aux 3 channels in device select to be able to
access the Pitch function. The Pitch curve mixes the throttle
channel to the channel that is selected as PIT in the device

select mode.

Note: PIT (Pitch) must be selected in Device select for the
GEAR, AUX2 or the AUX 3 channel to allow access to the
Pitch Curve Function.

The points that can be adjusted are listed vertically by name

(Point-L, 1, 2, H, etc.) and are also displayed by number on the

graph.

Change the value of a point by highlighting and selecting the

point name and adjusting the desired percentage.

68: Pitch Curve

Point Names/Numbers

Current Point Setting

This list shows the setting for each of the 8 adjustable points
(Point-L, 1, 2, 3, 4, 5, 6, H). The value of each point determines

where the point is positioned vertically on the graph, which

dictates the Pitch servo position relative to the throttle. The
point values can be set from 0 to +100.

The value for a point can be changed by highlighting and

selecting the Point Name to the left of the point value and then

adjusting the desired value.

Pressing the CLR button when a point value is highlighted

resets the point to original settings.

A-56

The vertical line on the graph shows the current throttle channel
position. When the throttle channel is deflected fully in one

direction, the line is to the extreme left over Point-L, when it
is at neutral it is in the center over Point-1 and when it is fully

deflected in the other direction the cursor is at the extreme right

of the graph over Point-H. Where the vertical line intersects the
Curve/Line over a given point defines the pitch servo’s position,

which is equal to the value assigned to that point.

The graph illustrates the pitch curve. The X-Axis (horizontal

plane) represents throttle channel movement. The Y-Axis
(vertical plane) represents the Pitch servo movement.

The Exponential function blends the Curve between the points

on the graph to provide a smooth response. The default value is

OFF. To turn it on and smooth the mixing curve, highlight and
select OFF and it will toggle to ON.

The Pitch servo position next to OUT at the bottom left of the
display is expressed in values from 0 to +100. It represents the
servo travel that corresponds to the present Throttle Channel

position.

Vertical Line

Graph

Points That Can Be Added and Adjusted

The Pitch Curve is defaulted to three points (L, 1 and H). Up to

five additional points can be added. To add a point, move the

throttle stick in the desired position until STOR appears on the
left bottom of the screen. Pressing STOR will store a new point

at that position.

Exponential

Pitch Channel Position

Throttle Channel Position

The Throttle channel position is shown on the bottom line of the
display next to IN and is expressed in values from 0 to 100 with

50 being the center or neutral position. It represents the present

Throttle channel position.

Note: To eliminate a point press ERAS (bottom left of the

screen) when the point is highlighted.

A-57

Switch Select

There are numerous switches that can be used to switch

between the Pos0 and Pos1. Note: if the upper and lower
settings for Pos0 or Pos1 are left at 0% the mixer can be turned

on and off with the switch. In addition, if Flight Modes are

activated in the Devic.SEL function, then flight mode switches

may be selected. Also Switch positions can be used to select

between Pos0 and Pos1.

To select a switch that will switch between the Pos0 and Pos1

values, highlight and select the switch name and it will toggle

between Pos0 and Pos1.

CLR Button

Pressing the CLR button while a modifiable parameter is

selected will reset the parameter to its default value.

Note: Pressing the CLR button when either the Master or

Slave is highlighted will inhibit the entire mix.

LIST Button

Press the LIST button to return to the FUNCTION List, or rotate
the rotary selector until L.S.T. appears next to LIST and select it
to return to the SYSTEM Menu.

ENT Button

Press the ENT button to return to the Main Display.

A-58

The Mix Monitor screen displays all the mixes, dual channels,
wing types and snap roll functions. This screen is a convenient
way to determine which functions are activated.

1. To access the Mix Monitor screen, highlight and select MIX

MON in the FUNC.LIST to obtain the Mix Monitor display.

76: Mix Monitor

75: Monitor

1. To access the Monitor function, highlight and select

MONITOR in the FUNC.LIST to obtain the Monitor display.

The Monitor screen displays each channel and shows the
movement of channels when sticks, levers and switches are
moved. It renames channels according to special assignments
to assist in identifying each channel. For instance, when

Flaperon is the wing type, the Monitor will display RAIL for
right Aileron and LAIL for left Aileron instead of displaying
channel 2 and channel 6. The Monitor function also displays

the current value of all digital trims

2. The default display shows the graphical positions of
all channels. To view the digital trim positions for all

trims, highlight and select PAGE. View both displays

while moving sticks, switches and trim levers to see the
movements of various channels and trims.

A-59

12X Used as Master (Instructor)

1. If the 12X is being used as the Master Tx (the Tx operated
by the instructor), select the channel(s) that are to be
operated by the Slave Tx (Tx operated by the student) when
the trainer switch is depressed.

When all channel selectors are in the MAST position, NORMAL

appears on the display and all 4 channels are transferred to the
student when the trainer switch is depressed.

If only certain channels are to be transferred to the student,
highlight and select the channels that are to be transferred,

moving the indicator for these channels to the SLAV position

for these channels. When less than all channels are selected as

SLAV, PROGRAM T appears on the display indicating that the

Trainer System has been programmed to transfer only selected
channels.

The 12X is now ready to be used as the Master or instructor

Tx. Depress the Left trim lever to transfer control to the student.
Control will remain transferred until the Left trim lever is

released.

12X Used as Slave (Student)

Highlight and select MASTER and the display will switch to
SLAVE. A message will appear instructing to Connect DSC
& POWER off. Make sure the Tx power switch is in the OFF

position and the Trainer cord is connected between the 2
transmitters.

The 12X is now ready to be used as the Slave or student Tx.

78: Trainer

The 12X features a programmable Trainer System that allows
the instructor to transfer some or all of the primary flight control

functions (Throttle, Aileron, Elevator and Rudder) to the student.

It also allows for indicating if the transmitter (Tx) is to be the
Master (controlled by the instructor) or Slave (controlled by the
student). The right or left trim lever is used to transfer control to

the student when the 12X is being used as the Master/Instructor

transmitter.

All Dual and Expo rates, Gear, and flap positions are controlled
by the Master Tx. Only the Throttle, Aileron, Elevator and

Rudder channels are transferred to the Slave transmitter.

Note: The Slave transmitter battery must be charged.

1. Connect the Trainer cord between the Master and Slave

transmitters. Turn the power on to the Master transmitter
(the Slave Tx remains powered off and can even have the
module removed).

2. If the slave radio is a 72MHz system, make sure the Slave

Tx is in the PPM/FM modulation mode. If the slave system

is a 2.4 DSM, this does not apply.

3. Highlight and select Trainer in the FUNC.LIST to obtain the

Trainer Display.

A-60

87: Timer

The 12X features a sophisticated Timer System with three
timers. An integrated timer keeps track of total Tx-on time for
the current selected model and integrated time is displayed
on the Main display. Two other timers can be configured as

Countdown timers or as Stopwatches. These timers also appear

on the Main display when active and can be started and stopped
via various switches. In addition an interval function can be
programmed such that alarm will sound at preprogrammed
intervals. A Down Alarm can be programmed that will sound
an alarm prior and up to the programmed count down time and
a one-time function sounds the alarm once, or continuously,
when the time is reached.

1. To configure the timers, highlight and select Timer in the

FUNCTION LIST to obtain the Timer display.

2. Highlight and select INH under TIMER1 or TIMER2 and
then select DOWN-T of STOP W. Use the Selector to set

the countdown set time, interval, down alarm and one

time functions. Once the timer is set, TIM will appear on

the Main display in the lower left corner. The timers can
be programmed to several different buttons or switches.

Use the Selector to highlight the desired button or switch
to operate the timer. Press the Selector to confirm the

selection. The desired set time, beep interval, down alarm

can be set as desired. When the One Time function is ON,

the timer will start with the switch selected, but pressing the

switch again will have no effect. If the One Time function is
OFF, the timer can be stopped and restarted as many times

as desired with the switch selected.

3. To Reset the Integrated Timer, highlight and select the
time under INTEG-T and Push [CLR]=0:00 appears on the
display. Press the CLR button to the left of the display to

reset the integrated timer.

Note: To reset the stopwatch or countdown timer, use the

roller to highlight the Stop or Down then press the CLR

button.

H-1

The 12X Heli Mode programming is designed for model

helicopters and includes 6 swashplate types making it

compatible with virtually every type of helicopter. The 12X
Heli program contains a host of sophisticated features. These
features include:

• Switch Assignability for channels and functions

• 50-model memory

• Up to six fully programmable Flight Modes

• Flight Mode Naming allows custom naming of each flight

mode.

• Warning system allows custom programming of alarms for

various switch and stick positions

• Programmable Servo Speed

• Triple Rates/Exponentials (up to 6 Rates EXPOs for Aileron,
Elevator and Rudder in flight modes)

• 6 Swashplate Types (normal, 2 servo 180, 3 servo 120, 3
servo 140, 3 servo 90, 4 servo 90)

• Electronic 3D Cyclic Ring prevents overdriving the cyclic

servos with combined aileron and elevator commands

• Adjustable Trim Rates (10 – 100 trim steps)

• Aileron to elevator and elevator to aileron mixing

• Built-In Cyclic-to-Throttle Mixing for Aileron, Elevator, and

Rudder

• Governor Mix with up to five programmable values

• Throttle Curves (up to 5) with up to 8 programmable points

• Pitch Curves (up to 6) with up to 8 programmable points

• Gyro System (In Flight mode Gain Selection of up to 6

gains)

• 8 Programmable Mixes (includes 5 multi-point and 3

standard mixes)

• Programmable trainer system (selectable channels for
Student Control)

• 3 programmable timers that can be triggered w/ the throttle

position or programmable switches

• Servo Monitor (automatically renames channels according

to assignments)

• Mix Monitor displays all active mixes

12X Helicopter Mode

Introduction

H-2

Pilots that have previous experience programming JR radios

may feel confident programming the 12X without referring to
the manual. Many of the functions and programming features

operate similarly to JR’s 9303 and 10X radios. The Heli section

Heli Programming

of the manual is presented in the same order as the functions
appear in the transmitter beginning with the System Menu
functions and then the Function Menu functions.

Flight Mode Switch

Antenna

Elevator D/R Switch

Power Switch

AUX 5 Knob

Throttle Trim

Aileron/Elevator Stick

Mix Switch

Handle

Flap/Mix Switch

Throttle/Rudder Stick

Rudder D/R Switch

Elevator Trim

Rolling Selector

Gear Switch

LCD Screen

AUX 4 Knob

Rudder Trim

Left Side Lever

Aileron Trim

Aileron D/R Switch

Programming Buttons

Right Side

Lever

Hover Throttle

Hover Pitch

Aux 2 Switch

H-3

Bind/Range Check Button

Battery Door

AUX 7 Knob

Handle

Left Lever

Aileron Spring Tension Cover

AUX 6 Knob

Trainer/transfer/PC Interface Jack

Right Lever

Elevator Spring Tension Cover

Rudder D/R

Charge Jack

Throttle Spring Tension Cover

Rudder Spring Tension Cover

H-4

System mode contains the foundational programming that is
normally only used when first setting up a helicopter. System
mode functions include: model select, model name, model
reset, Swashplate type etc.—functions that are typically set
once during setup and then are seldom changed or adjusted.

Below and throughout this section the functions are in the order
that they appear in the System Mode List.

Press ENT and hold while turning on the transmitter.

The screen should appear as follows:

System Mode

To Enter System Mode

System Mode List

System mode contains the follow screens:

84: Model SEL Model Select Page H-6

81: MDL Name Model Name Page H-8

28: MDL Reset Model Reset Page H-8

89: Type SEL Type Select Page H-9

85: MODULAT. Modulation Page H-10

(12X MV System Only)

93: Freq SEL. Frequency Select Page H-10

(12X MV System Only)

83: Trim SYS. Trim System Page H-12

91: STK Pos SW Stick Position Switch Page H-14

92: FM Name Flight Mode Name Page H-15

86: Transfer Model Transfer Page H-16

97: Warning Warning Page H-18

98: Settings Settings Page H-19

17: Device SEL Device Select Page H-20

34: Swash TYP Swashplate Type Page H-26

H-5

Function Mode contains the follow screens:

11: REV. SW Reverse Switch Page H-27

12: TRVL ADJ. Travel Adjust Page H-28

13: D/R & EXP Dual Rate and Exponential Page H-29

15: Sub Trim Sub Trim Page H-30

16: THRO Hold Throttle Hold Page H-31

18: THRO CURV. Throttle Curve Page H-32

24: SRV. Speed Servo Speed Page H-34

42: MIX-THRO Mix Throttle Page H-35

44: Gyro SENS Gyro Sensor Page H-36

45: Governor Governor Page H-37

47: Tail CURV Tail Curve Page H-38

61: Dual PIT. Dual Pitch Page H-39

65: Swash MIX Swashplate Mix Page H-40

68: PIT. CURV Pitch Curve Page H-42

51: PROG. MIX1 Program Mix 1 Page H-44

52: PROG. MIX2 Program Mix 2 Page H-44

53: PROG. MIX3 Program Mix 3 Page H-44

54: PROG. MIX4 Program Mix 4 Page H-44

55: PROG. MIX5 Program Mix 5 Page H-44

56: PROG. MIX6 Program Mix 6 Page H-44

57: PROG. MIX7 Program Mix 7 Page H-44

58: PROG. MIX8 Program Mix 8 Page H-44

75: Monitor Monitor Page H-52

76: MIX MON Mix Monitor Page H-52

77: Fail Safe Fail Safe Page H-52.5

(12X MV System Only)

78: Trainer Trainer Page H-53

87: Timer Timer Page H-54

Function Mode contains programming functions that are used
to complete the setup and then used to adjust and fine-tune

how the helicopter flies. Below and throughout this section the
functions are in the order that they appear in the Function List.

Press the LIST button after the transmitter is powered-up to
obtain the Function List.

FUNCTION MODE

To Enter Function Mode

Function Mode List

H-6

System Mode

Programming a new model generally begins by accessing
the SYSTEM Mode List. System Mode is where models are

selected, the model type is chosen (airplane, helicopter or
sailplane) and other high-level information is programmed. It is
also used to activate some of the more advanced programming
features such as Flight Modes, Switch Assignments and
Swashplate Types.

Accessing the System Mode

1. The System Menu [System Mode List] is obtained by
holding down the ENT button while turning the transmitter

on.

1. In the System MODE, highlight and select Model SEL using

the rolling Selector.

2. Use the rolling Selector to highlight MODEL then press

the roller and select the desired model number to be used
using the rolling selector.

3. Return to the System Menu by pressing the LIST button.

Model Select allows the programming parameters for up to 50
different models to be stored and selected in up to 50 individual

model memories. This screen also allows a model to be copied
from the current selected model to any of the other 49 available
internal model memories (model copy).

Note: When setting up a new model it is recommended
that an unused model memory is selected. If a current
model memory is selected, it’s recommended that
the model be reset to factory default setting before

programming the new model. See Model Reset page H-8.

84: Model Select- (Copy Function)

To Select a Model Memory

H-7

Model Copy

Making a backup copy of the model memory protects against
losing the original program and also allows one to experiment
with the original program, knowing that the original settings
can be restored by copying the backup copy back to the original
model memory.

To Copy a Model to Another Internal Memory

1. In the System MODE, highlight and select Model SEL using

the rolling Selector.

2. Use the rolling Selector to highlight Select then press the

roller to access model select.

3. Rotate the roller to select the desired model memory that
you wish to copy the current program to. (1-50)

4. Press the roller to select the highlighted model that you

wish to copy to.

5. Press the COPY button to copy the current model list above

to the selected model listed below.

6. Return to the System Menu by pressing the LIST button.

Note: The model memory that is copied to will be
replaced with the current model memory programming. It
is recommended that a model memory that is not being

used be selected to “copy to” as the information in that

memory will be erased and replaced with the current
model memory during copying.

H-8

1. In the System Menu, highlight and select MDL Name using

the Selector.

2. Using the roller position the cursor (indicates where the

next character will be placed) at the beginning of the

model name. Press the Selector to obtain a list of available

characters.

3. Highlight and select the desired character to form the model

name. After the character is selected, rotate the Selector to
position the cursor where the next character is to be placed
and press the Selector to obtain the character list again.
Repeat until the model name is completed.

4. Return to the System Menu by pressing the LIST button.

The model name screen allows each model to be given up to a
sixteen digit name or number. This is convenient for identifying
a model. The model’s name will appear on the main info screen.

81: Model Name

To Name a Model

28: Model Reset

Model Reset is used to reset all programming to factory default
settings. When setting up a new model it is important to
reset all parameters to their default or factory settings before

To Reset a Model Memory

1. In the System MODE, highlight and select MDL Reset using

the Selector.

2. Press the CLR button that is next to RES on the display.

3. Press the lowermost button next to YES on the display to

reset all data for this model.

4. Return to the System Menu by pressing the LIST button.

proceeding with any other programming. This is to ensure that
there are no programming values or functions active from a
previous model or programming session.

H-9

Type select allows the model type to be selected. Model types

include HELI (helicopter), ACRO (airplane) and GLID (glider).

Note: When changing model types, the programming
information will be reset to the factory default setting
losing the previous settings.

1. In the System Menu, highlight and select Type SEL using

the Selector.

2. Highlight and select HELI using the Selector and press the
selector to access the HELI mode.

3. Return to the System Menu by pressing the LIST button.

89: Type Select

To Select a Model Type

H-10

Note: This function is only available on the 12X MV

version and only when the TSM-72A 72MHz module is
plugged in.

Important: When the 72MHz module is plugged in and
the system is turned on, the antenna must be attached.

Operating the 72MHz module without the antenna attached

could overload the internal transistor causing a failure.

Warning: Only the JR TSM-72A and JRM2.4 modules
are compatible with the 12X MV. Do not install a standard-

type JR, Spektrum or other branded module in the 12X as
damage will occur.

The 12X MV version radio system allows the RF module to be

replaced allowing the system to operate on 72MHz or 2.4GHz.
Note that the transmitter automatically detects which module is
installed and modifies the accessible programming appropriate
to the module selected.

The Modulation screen (code 85) allows the selection of

modulation for 72MHz receiver types. Modulation types
available are:

APCM - JR’s newest version PCM

SPCM - Most current available JR PCM receivers use this type

of modulation

ZPCM - Compatible with older JR receivers

PPM - FM modulation

Note: It’s important to select the modulation to match
the receiver type. JR receivers have the modulation type
printed on the receiver.

85: Modulation - (12X MV System only)

To Program a Modulation Type

1. In the SYSTEM Menu, highlight and select Type MODULAT.

using the Selector.

2. Highlight and select the currently selected modulation type

(APCM) using the Selector and press the selector to access
all available modulation types (APCM, SPCM, ZPCM,
PPM).

3. Rotate the roller to highlight the desired modulation type

then press the roller to select the modulation type.

4. Return to the SYSTEM Menu by pressing the LIST button.

H-11

1. In the SYSTEM Menu, highlight and select Type FREQ SEL.

using the Selector.

2. Highlight and select the currently selected channel using
the Selector and press the selector to access all available
channels.

3. Rotate the roller to select the desired channel then press the

roller to select that channel. The selected channel will be
displayed on the main screen every time the transmitter is

turned on and RF-ON or RF-OFF will be displayed on the
left side of the screen. To transmit press RF-ON.

Note: This function is only available on the 12X MV

version and only when the TSM-72A 72MHz module is
plugged in.

Important: When the 72MHz module is plugged in and
the system is turned on, the antenna must be attached.

Operating the 72MHz module without the antenna attached

could overload the internal transistor causing a failure.

Warning: Only the JR TSM-72A and JRM2.4 modules
are compatible with the 12X MV. Do not install a standard

type JR, Spektrum or other branded module in the 12X as
damage will occur.

The 12X MV version radio system allows the RF module to be

replaced allowing the system to operate on 72MHz or 2.4GHz.
Note that the transmitter automatically detects which module is
installed and modifies the accessible programming appropriate
to the module selected.

The Frequency Select function allows the selection of 72MHz

channels 11 thru 60 when the 72MHz module is installed. This

screen displays the channel and corresponding frequency.

93: Frequency Select- (12X MV system only)

To Select a Frequency

H-12

The Trim System function adjusts the sensitivity of the 12X
trims, hovering throttle and hovering pitch trim levers and the

high pitch lever. The digital trims are adjustable from 0–10

with 10 being the coarsest adjustment and 0 being trim off.
Adjusting the digital trim values has no effect on the total trim
travel (unless 0 is selected), however, it affects the resolution
of each trim input. When the value is set to 10, each click of
trim adjusts the servo output by 10us and there are only 10

trim increments from center to each end. When set to 5, the
output is changed 5us per trim step and there are 20 trim

increments from center to each end. When set to 1, each click
of trim changes the servo output by 1us and there are 100 trim
increments. When set to 0 the trim levers cease to function
effectively turning off the trim function. The right and left trim

levers Are adjustable from 0 to 200 and can be turned on/ off.
When adjusted to above 100% the trimmer functions as a three-

position switch. Reducing the value increases the number of
output positions.

83: Trim System

When adjusting the digital trims (AILE, ELEV, RUDD), the total
trim travel does not change – only the number of increments

(beeps) changes, which makes for finer or coarser trim
movements. When adjusting the analog throttle trim, and the
high pitch trim, however, the total trim travel is actually reduced

when set to less than 100%.

It is recommended to use a fairly coarse setting, such as the
factory default 4, when test flying a model for the first flights in
order to be able to trim it quickly, and then use a finer setting,

such as 3–1, for final precision trimming.

LST Trim

The LST trim feature has two options, LST and normal. In

normal, when making trim changes using the Aileron elevator
or rudder digital trims, the center as well as the end points is
affected by the trim values ( i.e. right trim causes the center, the
right end point and the left end point to all shift to the right).

When LST is activated, only the center position is trimmed

(i.e. the center is shifted to the right but the end points are not
affected). This is useful for helicopters that have a hard stop end
point to prevent over travel caused by trim or if it’s desired to

have trim changes not affect the total roll pitch or yaw rate. LST

trim is normally turned on for helicopters.

H-13

1. Highlight and select TRIM SYS. in the SYSTEM MODE to

acquire the Trim System function.

2. Highlight and select the trim that is to be changed and

use the Selector to set a value of 1–10 (1 = finest, 10 =
coarsest; Note: the Flap and AUX trims can be turned off or
on by selecting On or Off).

3. Repeat for other trims as desired.

1. Highlight and select the desired channel (AILE, ELEV or
RUDD) next to (TYPE) LST and press the roller to select
LST or NORM.

3. Repeat for other channels as desired.

To Adjust the Trim Rates

To Select the LST Trim Function

H-14

The Stick Position Switch function allows the throttle, aileron

elevator or rudder stick positions to be preprogrammed to turn

on/off mixes or the timer. Four stick position programs are

available and one or more can be assigned to various mixes or

functions. The stick position that turns the Stick Position switch
on/off is selectable as well as the direction to turn on/off. Also

a symmetrical option is available that allows the function to
be turned on with a preprogrammed equal right or left (up or
down) stick position.

1. In the SYSTEM MODE, highlight and select STK PosSW

using the Selector.

2. Highlight the desired Stick position switch that you desire

to use (SPS0, SPS1, SPS2, or SPS3) and press the roller.

3. Select the desired channel that will be used to trigger the
Stick position (Throttle, Aileron, Elevator, Rudder).

4. Rotate the roller to select POS and adjust to the desired
value that you wish to have the mix function turn off/on (0 =
center, L100= left full stick travel, etc.

Note: ON/ OFF is displayed at the top of the screen and

when moving the stick this will indicate that the function is
working).

5. Use the roller to select ON and select Low/ High or Right /
Left to access the desired direction that the function will
turn on/off.

91: Stick Position Switch

To Program a Stick Position Switch

6. A symmetrical function is available that allows the stick
position to be turned on/off as the stick is displaced

symmetrically in either direction. It’s necessary to first

program a value in the POS then highlight the SYM

and activate it using the roller. The center can now be

programmed to turn on or off by selecting the ON and
highlighting Low/ High or Right /Left.

Note: The above procedure establishes the base for

turning on/off mixes, change throttle curves, change

differential rates, etc. To program the stick position it’s
necessary to go to the desired function in Function mode

and select SPS0, SPS1, SPS2 or SPS3 under SW (switch)

in that specific function.

7. Return to the SYSTEM Menu by pressing the LIST button.