Product:Spektrum™ DX20 transmitters with PID numbers beginning with:
NOTICE: Horizon Hobby, LLC has previously made efforts to quarantine and repair transmitters with wire routing problems. We are now able to better identify the transmitters affected by this issue. Even if Horizon Hobby had previously serviced your transmitter, please review your PID number to see if your transmitter requires service. Transmitters with a PID number ending in CMR are exempt from this bulletin.
Issue: The wire routing path can cause excessive wear on internal connections..
What To Do: Please fill out the Repair Request Form found here. After completing and submitting the Repair Request Form, Horizon Hobby will e-mail a shipping label for you to use to return the transmitter. Transmitters sent to Horizon Hobby for this service bulletin will receive priority in the service center. You will not incur any repair fees or charges, if a repair is necessary.
Finding the PID number:
The PID number is a manufactured identification number and is located on the outside of the product box and also under the battery lid on the DX20 as shown.
1. Export all programmed models to an SD card.
2. Remove the following items from the transmitter:
Any Aftermarket Accessories (cell phone mounts, Gimbal sticks, etc...)
3. Carefully wrap the transmitter in bubble wrap and pack the transmitter into a strong cardboard box, ensuring the transmitter will not move around in transit.
4. Attach shipping label and return address on outside of box
If you purchased your product outside of the US and Canada, please see the retailer or distributor you purchased your product from for assistance.
Horizon Hobby, LLC disclaims all liability and warranties for any consumer who does not act upon this bulletin. We apologize for this inconvenience. If you have any questions, please call Horizon Hobby Product Support at 877-504-0233.
ProTrim in-flight adjustment of rates, expo, mixes and differential
20 fully-proportional channels
Includes aluminum dual air transmitter stand up case
Wireless trainer link
Independent multi-engine control for airplanes
11ms frame rates with capable receivers
Built-in telemetry with vibe or voice alerts
Airplane, helicopter, sailplane and multirotor programming
11 airplane wing types
6 airplane tail types
2 canard options (1 rudder or 2 rudder) with elevon wing types
Active gyro trim
5 airplane and heli flight modes
7 swashplate types
7-point airplane and heli throttle curve
7-point heli pitch curve
7-point heli tail curve
5 sailplane wing types
3 sailplane tail types
10 sailplane flight modes
Multirotor flight mode setup, checklists and voice alerts
Throttle start or switch start timer
16 programmable mixes
0.5% mix rate increments
Flap delay and elevator compensation
Dual rates and expo
4000mAh LiPo transmitter battery
Global charging system
X-Plus™ technology expandability up to 20 channels
Large, backlit LCD screen
Includes AR9020 9-Channel DSMX receiver
Includes 3 stick end sets
5 menu languages: EN, DE, FR, IT and ES
Region settings for global compliance
From its premium construction and comfortable ergonomics to its powerful programming features, the DX20 delivers a pro-class flying experience that is second to none. In fact, it's the only transmitter in its price range equipped with machined aluminum gimbals.
Powerful AirWare™ Software for Expert Pilots
The Spektrum™ AirWare™ software that comes in the DX20 gives expert pilots all the programming features they could want along with a few they never knew they needed. And its intuitive SimpleScroll™ interface makes navigating menus and changing settings as simple as "roll and click."
The airplane programming includes a multi-engine control option that, when activated, allows you to independently adjust and control up to four engines or motors. You could use it to make individual run-up checks on the ground or synch propeller speeds in flight. It also makes it possible to use asymmetric thrust to tighten the turning radius of large models during ground operations.
ProTrim In-Flight Adjustments
When active, ProTrim will allow you to make small dual rate, expo, mix and differential adjustments in flight.
Programmable Voice Alerts
With voice alerts, you can keep tabs on important functions without ever taking your eyes off what you're flying. They can be programmed to call out what flight mode you've chosen or report telemetry information on demand. If an alarm goes off, you won't have to look at the transmitter display to see what's happening. The DX20 will tell you.
Pro-Class Programming for Sailplanes
In addition to extensive airplane and heli programming, the DX20 has the most impressive sailplane programming features you'll find in any handheld transmitter. Ten available flight modes, 5 wing types, 3 tail types, 2 motor types, flap delay with elevator compensation - it has it all. You even have the ability to adjust individual servo characteristics (end points, travel, center, etc.) for all 20 channels.
Program a sequence of switch-activated events with time delays between each event. For instance, with a flip of the gear switch you could have an auxiliary channel open landing gear doors, then have the retract channel lower the landing gear, followed by the auxiliary channel closing the gear doors after the gear is extended.
Built-In Servo Balancer
No more will you need a complicated network of little boxes littering your fuselage if you want to balance servos. You can precisely balance the output of swashplate servos or multiple servos on a single control surface with the transmitter using a 7-point curve mix.
Wireless Trainer Link
This exclusive Spetkrum technology gives DX20 users the ability to wirelessly link up with other Spektrum transmitters and specially-equipped Spektrum FPV headsets. Once bound to another transmitter or component, ModelMatch™ technology will allow the DX20 to re-link without having to go through the bind process again.
With Wireless Trainer Link, you could:
Wirelessly "buddy box" with another DSM2®/DSMX® transmitter when teaching someone to fly.
Assign gimbal functions to a 2nd 'camera' transmitter when flying a camera drone so you can focus on avoiding obstacles and maintaining visual contact while someone else lines up the shot.
Link with specially-equipped Spektrum FPV headsets to wirelessly control head tracking and remotely change video frequencies on the fly.
The enormous capacity of the DX20's on-board memory means you will rarely, if ever, need to juggle models between transmitter memory and your SD card. The model memory menu is easier to navigate too. Only memory slots with model settings saved to them will appear. You won't have to scroll through empty slots or move models around if one is deleted.
Because the DX20 uses the same AirWare™ software as many other Spektrum transmitters, you can share model setups across platforms with almost any Spektrum pilot.
Stay Up to Date
Register your DX20 and receive alerts whenever Spektrum Airware software updates are available. You also gain access to a growing library pre-set model setups for the most popular Horizon Hobby aircraft.
The DX20 has all the programming functions you need to fly everything from collective pitch helis and multi-rotor aircraft to competition sailplanes and giant-scale jets.
ProTrim In-Flight Adjustment of Rates, Expo, Mixes and Differential
AS3X Gain Adjustment
Flap Delay and Elevator Compensation
10 Flight Modes
Dual Rates and Expo
0.5% Mix Rate Increments
16 Programmable Mixes
Multirotor Channel Inputs - ALT (Altitude), ROL (Roll), PIT (Pitch), YAW
Multirotor Checklists, Warnings and Voice Alerts
Simplified Multirotor Flight Mode Setup and Switch Assignment
Includes AR9020 Receiver with X-Plus™ Technology
Both the DX20 and the AR9020 receiver it comes with have X-Plus channel expansion capabilities. This means you can add up to eight extra channels with an X-Plus channel expansion module (SPMXP8000 - sold separately). Just plug the module into the receiver, bind it and then assign the extra channels to any function you want.
Fly Smarter with Built-In Telemetry.
Built-in telemetry gives you real-time information on things like your model's battery voltage, signal quality, engine or motor temperature, airspeed, altitude and more. You can have the DX20 recite this information on demand using programmable voice alerts. You also have the option of logging telemetry data to the transmitter's SD card for review after the flight.
To use the telemetry function, your model must be equipped with a Spektrum telemetry module and telemetry sensors (all sold separately). You will find there are Spektrum telemetry sensors for tracking just about any model function you can think of, and new ones are being added all the time.
Superior Ergonomics. Made to Fit the Way You Fly.
The weight distribution and ergonomics of the DX20 have been optimized to fit the way you fly. The result is a sense of balance and comfort that perfectly complements the speed and precision of DSMX technology.
Notable features include:
Comfortable leather side grips
Adjustable stick length and tension
Machined aluminum, quad-bearing gimbals
User-adjustable mode configurations (1, 2, 3 or 4)
User-assigned switch functions
Easy-to-read backlit screen
Intuitive SimpleScroll programming interface
Includes 3 stick end sets - short, medium and long
DSM or Digital Spectrum Modulation is Spektrum's proprietary method of implementing 2.4GHz spread spectrum technology for the R/C industry. DSM divides the 2.4GHz band into 80 individual channels (frequencies) and incorporates direct sequence spread spectrum with an embedded GUID (Globally Unique Identifier) code. DSM has been painstakingly optimized by our engineers for RC surface and aircraft use, offering the most robust RF link in the industry.
DSM2 is the 2nd generation of Spektrum DSM technology and remains a premier 2.4GHz choice even today. Using the same superior wideband DSSS foundation that all Spektrum technology is based on, DSM2 consistently provides faster response and more precision than most non-DSM 2.4GHz protocols.
DSMX is a natural evolution of DSM2 technology that is the result of several years of development, optimized for pilots and combining Wideband DSSS and Frequency Agility. It builds on what has come before and takes DSM to the next level of robustness, reliability and efficiency without leaving current DSM2 users behind. DSMX represents the world's first wideband, frequency-agile 2.4GHz signal protocol and the most advanced spread spectrum RC technology to date.
The foundation DSMX is built on is the same foundation as DSM2™ - the superior on-channel interference resistance and coding gain of wideband DSSS. Compared to the wideband signal of a DSM2 or DSMX™ system, the narrow-band signal of other 2.4 transmitters is more likely to suffer crucial data loss in the event of on-channel interference. Think of wideband 2.4 as a river and narrow-band 2.4 as a stream. It takes much more interference to stop a river than it does to stop a stream.
The big reason wideband is so robust is coding gain. Essentially what this means is that the unique coding in a DSM2 or DSMX wideband signal allows it to be heard well above the noise of surrounding 2.4GHz signals without requiring any more power. In fact, a Spektrum wideband signal can achieve as much as 3X the range of its narrow-band competition using the same amount of power.
For the most part, yes. DSM2 transmitters are forward compatible with DSMX receivers and DSMX transmitters are backward compatible with DSM2 receivers. And because DSM2 and DSMX share the same wideband DSSS foundation, all Spektrum users will enjoy superior range, speed and precision whether they're using DSM2 equipment, DSMX equipment or a combination of both. The only exception is the DXe which is DSMX-only and not compatible with DSM2 receivers.
Yes, but DSM2 users who rarely, if ever, fly in big events or other "noisy" 2.4GHz environments may find the DSM2 equipment they have now is all they will ever need. The difference DSMX makes is only apparent when hundreds of 2.4GHz systems are in use at once. To see if your transmitter is eligible for the DSMX add-on, please visit horizonhobby.com, click on the “radios” tab, and select “DSMX addons” for more details.
A resequencing of the data a Spektrum transmitter transmits based on the type of mixing you select. This feature helps to sync control services that are connected (such as a swash plate on a helicopter) and is used in radios that have many channels.
The Spektrum™ X-Plus™ 8 module lets you add 8 fully proportional channels to specially equipped Spektrum transmitters and receivers with 10 or more proportional channels. Just plug it into the X-Plus port of a compatible receiver. It is ideal for scale modelers who like to push realism to the extreme with working accessories and lights in addition to the regular control functions. The DX10t and DX18 offer X-Plus.
You should have no problem maintaining control as long as you maintain direct line-of-sight with your model. If you try to fly behind a group of trees or otherwise obstruct your direct line-of-sight, you could be susceptible to losing your control link.
You can download Spektrum Apps from the Google Play Store at https://play.google.com/store/apps/developer?id=Horizon+Hobby,+Inc. or from the iTunes store at https://itunes.apple.com/us/developer/horizon-hobby-inc/id415542050
The length of the antenna is on a Spektrum receiver is set and tuned to optimize the range and performance of the receiver. We do not recommend altering the length of the antenna on any Spektrum Receiver.
For help and assistance on your Spektrum products you can contact Horizon Hobby Product Support at https://www.horizonhobby.com/content/service-center-render-service-center, the Spektrum Facebook page at https://www.facebook.com/SpektrumRC/ pr the Horizon Hobby Facebook page at https://www.facebook.com/HorizonHobby/.
Product Support Tips
How to Create an Account on SpektrumRC.com
How to Register Your Spektrum Transmitter
How to Export your Spektrum Radio Serial Number to an SD Card
How To Update the Software in Your Spektrum Aircraft Transmitter
Technical questions about this Spektrum product should be directed to Horizon Hobby's Product Support Department:
Horizon Hobby, LLC. ATTN: Product Support 2904 Research Road Champaign, IL 61822
To place a Horizon Hobby Support Inquiry please visit our Inquiry FormSupport Phone:(877) 504-0233 Fax:(217) 355-1552
If you would like to purchase this product, please go to the Store Locator or contact the Horizon Hobby Consumer Sales Department:
Horizon Hobby, LLC. ATTN: Consumer Sales 2904 Research Road Champaign, IL 61822 Email: firstname.lastname@example.orgSales Phone:(800) 338-4639 Fax:(217) 355-1552