3-Channel, 4-Model Memory DSM® Racing System © 2009 Horizon Hobby, Inc. 4105 Fieldstone Road Champaign, Illinois 61822 USA (877) 504-0233 horizonhobby.com Horizon Hobby UK Units 1-4 Ployters Rd Staple Tye Harlow, Essex CM18 7NS United Kingdom Horizon Hobby Deutschland GmbH Hamburger Strasse 10 25335 Elmshorn Germany DSM and DSM2 are trademarks or registered trademarks of Horizon Hobby, Inc. The Spektrum trademark is used with permission of Bachmann Industries, Inc.
Table of Contents 2 Introduction............................................................................................................................. 3 DX3.0 Quick Start Setup.......................................................................................................... 3 DX3.0 Quick Start Setup (continued)....................................................................................... 4 DX3.0 Quick Start Setup (continued)..........................................................
st – (continued) REV • NORM Indicates Current Channel ST = Steering TH = Throttle AUX = Auxiliary Channel 3 (optional) (continued) Indicates Current Servo Direction ENter SCROLL Channel CLEAR INCREASE DECREASE Servo Trim Adjustment T RI M Direct Trim Access 1. With the transmitter power switch on, press the SCROLL key to enter the Function mode. 2. Press the SCROLL key until REV.NORM appears on the screen. The “ST” indicates the steering servo reversing screen. 3.
Binding The DSM® system operates in the 2.4GHz band (that’s 2400MHz). This high frequency offers a significant advantage, as it’s well out of the range of model-generated radio interference (like motor and ESC noise). All the complex issues that now exist using 27 and 75MHz radios with model-generated interfering noise are eliminated with this system. The DSM system uses Direct Sequencing Spread Spectrum modulation to generate a wide signal on a single frequency.
Receiver Power System Requirements Inadequate or intermittent power to the receiver that is unable to provide the necessary minimum voltage during operation is the number one cause of control failures with Spektrum systems.
3. 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 9.6 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.
Receiver Compatibility The DX3.0 features DSM technology and is compatible with Spektrum DSM and DSM2 surface receivers and the marine receiver. Charging Jack Compatible Spektrum Receivers The DX3.0 is compatible with the following receivers. Located on the left-hand side of the transmitter is the charging jack, which accepts only JR® or Spektrum™ style wall chargers. Please do not attempt to use any other brand of wall charger as it may be the reverse polarity and can cause damage to your system.
Display Screens Normal Display Screen When the power switch is turned on, the LCD screen will read as shown below. This screen is referred to as the Normal Display. Note: If any of the electronic trim buttons are moved while in this screen, the screen will automatically change to display the trim in use. This is called the Direct Trim Mode. For more information on the feature, please see page 5 of this manual. -- MD1 10.
Model Select System Mode The DX3.0 has memory for four models. This feature allows for four different models to be operated with the same transmitter (additional receivers and servos must be purchased separately) or one model with four different race setups. -- MDL I Frame Rate System Mode While most servos are compatible with the fast frame rate, some older analog servos require the use of the slower normal frame rate. Model Number Accessing the Frame Rate Function 1.
Auxiliary Channel 3 Function Select System Mode (continued) 0 = The 0 or Inhibit function allows the Brake Endpoint Adjustment function, page 32, to be used. This function is designed to be used with most types of electric and gas-powered RC cars. This feature is extremely popular, as it allows the amount of panic braking accessible through the throttle trigger’s braking position to be adjusted during operation for maximum effectiveness.
Data Reset System Mode The Data Reset function allows you to reset all the programming in the selected model (1, 2, 3 or 4) to the factory default settings and to copy model data from one model memory to another. Before using the Data Reset function, it’s important to enter the Model Select function and check to make sure the current model number indicated (1, 2, 3 or 4) is the model which you want to reset to the factory default settings. The Model Select function is described on page 16.
Accessing the Function Mode To enter the Function Mode, turn on the transmitter and then press the SCROLL key. The display will change to show the first function listed on the Function Mode flow chart as shown below. Press the SCROLL key to scroll down through the functions one by one, as shown in the flow chart. Once the desired function has been reached, use the CHANNEL key to select the appropriate channel (if applicable).
Exponential Function Mode The Exponential feature of the DX3.0 allows you to alter the response rate of the steering or throttle control around neutral without affecting the maximum amount of steering or throttle available. The adjustment range is from -100% to 0% (Linear) to +100%. Exponential is factory-set to linear for both steering and throttle. Exponential is often used to settle down a car that is twitchy around center without giving up maximum steering response. The DX3.
Programmable Mixing Function Mode The DX3.0 offers two different mixing adjustments that allow for mixing one channel to another channel. The mixes available are Steering-to-Auxiliary Channel Mixing and Throttle-to-Auxiliary Channel Mixing. Each direction is independently adjustable. Popular use of this function includes 4-wheel steering and independent front and rear wheel brakes. For example, Throttle-to-Auxiliary channel mixing can be used for independent front and rear wheel brakes.
Sub-Trim Function Mode The Sub-Trim function of the DX3.0 is an electronic trimming feature that allows the neutral position of the servo on either the steering, throttle or auxiliary channel (optional) to be moved, while allowing the electronic trim lever for that channel to remain in the center position. This feature is very useful as it allows the servo arm/wheel position to be moved to help with control linkage installation, eliminating the need to make mechanical linkage adjustments.
Steering Trim (STC) The DX3.0 electronic Steering Trim lever, located just above the steering wheel, allows the center position of the servo to be manipulated in either direction to achieve precise centering of the steering assembly. Steering Travel Endpoint Adjustment values (page 24) remain completely independent from the steering trim, unless the trim value exceeds the selected endpoint values.
Grip Lever B: Steering Dual Rate Trim Adjustment STG The Steering Dual Rate Trim Adjustment, located at Grip Lever B, allows the dual rate value (maximum servo travel) to be increased or decreased within a range from 100% through 20% of the total endpoint value established in the steering EPA function. This function is very useful in race conditions as it allows you to custom tailor the steering radius and sensitivity for the current track conditions.
Auxiliary Channel 3 Access (Fuel Mixture) When selected, Grip Lever A can be used to access the Auxiliary Channel 3 function of the DX3.0 for use as a fuel mixture channel. AUX 0 Current value When the LN (linear) Auxiliary Channel 3 function is selected, Grip Lever A can be used to change the neutral position of the servo to lean or richen the engine’s fuel mixture.
or damage to the Product or other property. This Product is not intended for use by children without direct adult supervision. The Product manual contains instructions for safety, operation and maintenance. It is essential to read and follow all the instructions and warnings in the manual, prior to assembly, setup or use, in order to operate correctly and avoid damage or injury. Questions, Assistance, and Repairs Your local hobby store and/or place of purchase cannot provide warranty support or repair.
FCC Information This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. aution: Changes or modifications not expressly approved by the party responsible for C compliance could void the user’s authority to operate the equipment.
