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9303 Air Synthesized Radio - R2100 - No Sx's
  • Overview
  • Specs
  • Reviews
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  • Manuals & Support

Key Features

  • Fully Synthesized frequency selection/ No need for crystals
  • Flight modes (3 air, 5 sailplane, heli)
  • Fail Safe system
  • Modulation, SPCM or FM output
  • Gyro System (In-flight selection of 3 gains for up to 2 gyros)
  • 6 Programmable mixers (2 Multi-point style)


A true breakthrough in versatility, the 9 channel, 30 model memory, 3 model type XP9303 will adapt to your RC needs at a level that’s absolutely unprecedented. Fact is, while the 9303 is right at home guiding the simplest of sport models, park flyers and gliders, its capacity for more complex assignments – including meeting the demands of a wide variety of competition disciplines – is virtually unlimited. So if you’re still working your way up to the challenges and thrills of large aerobatic models, multi-engine scale planes, 4 wing-servo camber-changing sailplanes, the latest CCPM helicopters or sport-level jets, the XP9303 will be ready when you are.

Detailed Information


Even before you explore the XP9303’s virtually limitless programming options, you’ll be sure to notice its incomparable feel – its ultra-smooth sticks, precision switches and levers, innovative Rolling Selector, plus case ergonomics that’ll have it melting in your hands. It’s the unmistakable feel of JR quality, and you’ll experience it every time you remove your 9303 for yet another of the countless flying sessions you’re certain to enjoy with it.

Whether your favorite planes are engine or electric, scale or aerobatic, basic or complex, the XP9303’s airplane software has everything it takes to bring out their best - and everything it takes to make flying them the most enjoyable experience possible. For instance:

- There’s a 3 position flap program whose elevator compensation provision includes a delay feature to smooth its position-to-position transitions.

- Using the 9303 “Wing Type” screen’s channel assignment feature, setting up synchronized dual–servo elevators, rudders, ailerons, flaps – even throttles – is a walk in the park.

- Taking advantage of the radio’s Triple Flight Modes (which are selected by a single, 3-position switch), offers in-flight re-configurations that can really reduce pilot workload. (Imagine what 3 different sets of rates, trims, mixes, etc., can accomplish when they’re activated by the flick of only one switch.) A bit more time to set up? Sure. But pros will agree: It’s time well spent.

- By using creative combinations of the 9303’s multi-function button switch (ordinarily just a “snap roll button”), its multi-point mixes and independently adjustable servo speed feature, inventive modelers will achieve a myriad of unique functions for special control and accessory operations.

- Flyers using the 9303’s gyro system will discover it’s the most versatile ever. It handles multiple gyros, then makes it possible to switch activate them or even tie them into flight modes.

- With the 9303’s throttle curve feature, it’s possible to customize your throttle response just the way you like it. Torque-rolling aerobatic flyers can, for example, flatten throttle response in the hovering range. Scale flyers will create a more linear throttle response. And twin flyers will find this invaluable for synchronizing engines.


  1. Multi-function button switch. Besides working as a timer or snap roll button, it’s assignable to numerous 2-position tasks. Retracts are an example: Touch once for gear up, touch again for gear down.
  2. Dual rate switches may be used as designated. Triple rates are available as components of the 9303’s flight modes, when they’re activated.
  3. Dual side levers offer handy access and flexibility when they're used with a program mix and/or assigned to virtually any function you choose.
  4. The XP9303’s flexible and versatile programming requires phenomenal memory and processing power. Not surprisingly, the 9303 employs an advanced, powerful microprocessor with nearly 6 times the RAM and ROM of previous generation systems.
  5. Largest-in-its-class dot matrix display enhances comprehension and accommodates more information at a higher resolution.
  6. JR’s innovative, exclusive Rolling Selector System is at the heart of the 9303’s programming operation. You’ll roll to scroll, press to select, roll to adjust and press to store. It’s fast and it’s intuitive.
  7. JR’s exclusive 3+1 trim system combines the precision of 3, digital flight-axis trims with an analog throttle trim for immediate visual and tactile reference to idle position.

Function Menu: All airplane programs are easily accessed through a single screen. Using the Rolling Selector, move the cursor over the desired program, and press. Also, as you add functions, the list changes. For example, if the flap system isn’t activated, it won’t appear in the menu.

Have it your way! Using a programmable mix, you can assign 18 different switch/stick/lever/buttons to activate programmable mixes. This allows the user to have a button, or a lever, a stick, or a switch activate a function. 6 programmable mixes are available.

Channel Naming: Screen layouts are simple and easy to understand. In this example, the program has automatically renamed the aileron, elevator and rudder channels when the dual servo system has been activated.

Triple Timer System: Not only does the 9303 offer an integrated timer (to keep track of time on the model), but both stopwatch and “down” timers are offered to time individual flight time. This can save your model by preventing fuel exhaustion. Timer activated by button.

Dual /Triple Rates : As shown here, the 9303 actually features triple rates when flight modes are activated. One, three-position switch gives you independent rates on aileron, elevator and rudder to reduce pilot workload.

Two Multi-Point Mixes: In some conditions, the proper mix may be non-linear. For these situations, the 9303 offers two multi-point mixes with 7 fixed points that are fully adjustable in .5% increments. Very helpful for rudder-to-elevator, flap-to-elevator and numerous special functions.

Throttle Curve : Want to correct a non-linear throttle response? Or make the throttle of your 3-D plane less sensitive while hovering? How about matching your left engine to your right? You can accomplish it all with the 9303’s throttle curve system.

Pre-Mixes for Aileron-to-Rudder; Elevator-to-Flap : These common mixes are provided by “pre-mixes”. You can choose 1 or 2 pre-mixes, then assign them to a variety of switches -- or flight modes -- as needed.

Bi-Directional, Adjustable Servo Speed: Scale flyers rejoice! Not only can you adjust servo speeds to up to 15 seconds for full transit, with your 9303 you can adjust different speeds for different directions. It’s very handy for electrically operated gear doors, scale functions, actuators, etc.

Three Position Flap System with Delay: This new flap system provides easier actuation of all aspects of a three-position system. Each flap position – plus any required elevator compensation - is specified using the Rolling Selector. Additionally, when flight modes are activated, flap positions can be assigned to any of the three flight modes. There’s a delay system (up to 2 seconds) for elevator compensation to ensure smooth transitions.

Band: 72MHz
Channels: 9
Charger: NEC-222
Computer Radio: Yes
Modulation: FM/PPM,S-PCM
Output: Approximately 750 mw
Programming Features: Air Heli Sailplane
Range: Full
Receiver: R2100 Scan Select
Transmitter (Tx) Battery Type: 600 mAh 9.6V

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Where is my serial number

Please follow the instructions in this tutoral to find your serial number -

How to register my Spektrum products?

Please follow the instructions in this tutoral to learn how to register your Spektrum RC products-

How do I download and install Airware or Raceware updates for my radio?

Please follow the instructions in this tutoral to learn how to downloadn and install firmware updates for your Spektrum Radio-

Where do I find setup files I can download for my model??

Visit the product page on for your transmitter and click on the "Manuals and Support" tab for downloadable setups.

What ESCs and servos can I use with Spektrum Receivers?

Spektrum receivers are compatible with most popular speed controls and servos on the market.

What is DSM?

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.

What is DSM2?

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.

What is DSMX?

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.

What is Frequency Agility?

These systems usually transmit a narrow band signal and rapidly jump through a fixed set of frequencies, spending a few milliseconds on each frequency.

What is Wideband DSSS?

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.

Are DSMX and DSM2 equipment compatible with each other

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.

Are DSM2 transmitters eligible for a DSMX add-on?

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, click on the “radios” tab, and select “DSMX addons” for more details.

What is ModelMatch?

A safety feature that prevents a pilot from flying a model when the model selected in the radio is not correct.

What is Servo Sync?

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.

What is X-Plus?

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.

How much range can I expect out of my radio system?

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.

Where can I find Spektrum Apps?

You can download Spektrum Apps from the Google Play Store at,+Inc. or from the iTunes store at

Can I change/shorten/lengthen the antenna on my Spektrum Receiver?

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.

Where can I get service and technical information?

For help and assistance on your Spektrum products you can contact Horizon Hobby Product Support at, the Spektrum Facebook page at pr the Horizon Hobby Facebook page at

Product Support Tips

What are the differences in the transmitter between the air, heli, and glider systems?

The only difference between the air and glider systems is the switch labels. The difference between the air/glider system and heli systems is the switch positions and their corresponding labels. One of the 3 position switches is moved from the left front on the air system to the top left on the heli which is the FM switch for the heli . The gear switch on the air is on the top left back position, and moves to the front left position on the heli where the 3 position switch is on the air . The air has a trainer/snap roll button on the top left side, which this changes to a long momentary switch that is moved to the top left back on the heli . Programming wise however, they are identical for all 3 types.

What modulation types does the 9303 support?

The 9303 from the factory will support SPCM and PPM (FM) modulation types. ZPCM modulation type can also be activated by the JR service center, this is a no charge service.

The transmitter continually beeps and the screen says SW Warning and will not allow me to access the programming, what is wrong?

The flight mode switch is not in the normal or 0 position. Move the flight mode switch/switches to the 0 position and the beeping will stop and allow you to access the programming.

Can I set up the radio so that I only have to flip one switch at the top of the tow?


No. You can bypass them and still retain all of the basic computer programming.

No. You can bypass them and still retain all of the basic computer programming.

Am I forced to use the flap stick for motor control?

No. Motor control can be assigned to a stick, a slide, switch or function button.

I'm setting up a heli with 140 degree CCPM and the swashplate servos do not travel the same distance, what is wrong?

Early 9303 systems had a problem with 140 CCPM mixing, causing uneven servo travel. JR has made the programming changes necessary to correct this problem. The service center has the equipment necessary to correct this issue. To find if your system is affected, go to a clear model, activate 140 CCPM, then go to the servo monitor. If you give elevator (fore or aft cyclic) and channels 2 and 6 which are the 2 rear servos do not travel the same amount which would produce a left or right roll (left or right cyclic) your system is affected. If they travel the same amount, your system is unaffected.

Yes. Motor control can be inhibited, allowing the channel to be slaved to other functions.

Yes. Motor control can be inhibited, allowing the channel to be slaved to other functions..

Why are my servos erractic until I turn my transmitter on?

With power applied to the receiver it is looking for a signal. If the transmitter is not on it will pick up various stray radio signals(RF/noise) in your area and cause servos to appear erratic.

The cardinal rules for RC:

   1. When starting, turn on the transmitter 1st and receiver 2nd.

   2. When finished, turn off the receiver 1st and transmitter last.

Is there any risk to using cellular phones in close proximity with my radio?

Absolutey not. Most cellular phones operate in 900Mhz (and above) and should have no effect on your radio's transmission or programming.

What types of cleaning fluids are appropriate for my transmitter?

Any fuel residue can be removed using a small amount of isopropyl alcohol and a cloth. It will not affect the plastic of your transmitter. Always remove raw fuel immediately from your transmitter.

Why do the servos shake or 'jitter' when my transmitter is close to the model?

When the transmitter is in close proximity to the receiver the modulated signal can be overdriven. This condition is referred to as "swamping." By collapsing the antenna and stepping away from the model, you should see this condition dissipate.

Make sure to perform a proper range check and then extend the antenna before operating the model.

I'm using my PCM radio as a slave and it isn't working, why?

Check that you have the radio set to PPM if modulation type is selectable. If your radio does not have PPM capability it will not function as a Slave radio.

Does JR have a higher capacity TX battery for my radio?

Most JR Radios come with a 600mAh battery. JR offers an 800mAh replacement for most JR transmitters.

How should I store my Transmitter for an extended period?

When storing your TX for an extended period of time, make sure it is wiped clean from fuel or other residue. Disconnect the battery from the transmitter and store the radio in a cool, dry place.

Why does my throttle (or other specific control surface) not respond today when I had full control yesterday?

This can happen for several reasons.

To fix:

    A. Check that the travel adjust is not set at zero or low value.

    B. Try switching to another model memory that hasn't been programmed and re-check to see if control has returned.

    C. Check to see if servo is properly connected and/or try another servo.

What is the maximum charge rate?

We recommend 1 amp or less. The transmitter can handle up to 2 amps for short periods of time. For the best results, please use the supplied JR wall charger.

Why does my transmitter keep blowing fuses?

1. Damaged charge plug

2. Polarity damage

3.. Static electricity on the charge plug

4. Charge rate set too high

What are the common causes of reverse polarity?

The most common reasons for reverse polarity:

    1. Charger with improper connection. See your JR Radio Manual 

    2. Broken battery connector

    3. Altered battery leads

What is the difference between analog and digital trims?

Analog trim transmitters use a potentiometer to vary a voltage for trim adjustment. Digital trim transmitters have micro-switches to step trim adjustment.

Can I buddy box a Futaba radio with my JR radio?

Yes, with Hangar 9's Trainerlink (HAN173)

Can my transmitter be changed from 72 MHz to 75 mhz for surface use?

Yes, either by purchasing a separate 75 MHz module(all module compatible transmitters) or sending the transmitter and/or module to our Service Center for conversion.

Does the slave transmitter need a crystal?

No, the carrier frequency is generated by the master.

Does a trainer transmitter (slave) need a battery pack?

Yes, though it is sending it's signal to the master transmitter and not transmitting on its own, the slave requires power for its circuitry that is not supplied by the master.

Why doesn't the fuse protect against reverse polarity?

The fuse is a device to protect against overcurrent. It's not a polarized component affected by direction of current flow.

Which is better - PCM or FM?

PCM. It has advantages over FM: less susceptible to noise, fail-safe programming, and better servo-positioning accuracy. However, FM is generally more affordable. The difference in range between PCM and FM negligible.

What's the difference between PCM and FM?

FM (Frequency Modulation) uses an analog sine wave to carry data between the transmitter and the receiver.

PCM (Pulse Code Modulation) uses digital encoding to transfer information between the transmitter and the receiver.

Why isn't my repair covered under warranty?

Manufacture defects are the only issues covered under warranty. Use, abuse, reverse polarity, stripped gears, etc. are not covered.

Why does a transmitter battery voltage drop off so fast after charging?

The battery packs are 9.6v. After charging, voltage level will peak at around 11.6v and will drop to approximately 10.6v quickly and stabilize, then slowly decrease to 9.6v.

What modules work with what radios?

Any JR module will work in any JR transmitter that accepts a module.

Warranty Period:

What this Warranty Covers:
Horizon Hobby, Inc., (Horizon) warrants to the original purchaser that the product purchased (the "Product") will be free from defects in materials and workmanship for a period of 3 years from the date of purchase.


Limited Warranty:

What is Not Covered:
This warranty is not transferable and does not cover (i) cosmetic damage, (ii) damage due to acts of God, accident, misuse, abuse, negligence, commercial use, or due to improper use, installation, operation or maintenance, (iii) modification of or to any part of the Product, (iv) attempted service by anyone other than a Horizon Hobby authorized service center, or (v) Products not purchased from an authorized Horizon dealer.


Purchaser’s Remedy:
Horizon’s sole obligation and purchaser’s sole and exclusive remedy shall be that Horizon will, at its option, either (i) service, or (ii) replace, any Product determined by Horizon to be defective. Horizon reserves the right to inspect any and all Product(s) involved in a warranty claim. Service or replacement decisions are at the sole discretion of Horizon. Proof of purchase is required for all warranty claims. SERVICE OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY.

Limitation of Liability:
HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY, REGARDLESS OF WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, TORT, NEGLIGENCE, STRICT LIABILITY OR ANY OTHER THEORY OF LIABILITY, EVEN IF HORIZON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Further, in no event shall the liability of Horizon exceed the individual price of the Product on which liability is asserted. As Horizon has no control over use, setup, final assembly, modification or misuse, no liability shall be assumed nor accepted for any resulting damage or injury. By the act of use, setup or assembly, the user accepts all resulting liability. If you as the purchaser or user are not prepared to accept the liability associated with the use of the Product, purchaser is advised to return the Product immediately in new and unused condition to the place of purchase.

These terms are governed by Illinois law (without regard to conflict of law principals). This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. Horizon reserves the right to change or modify this warranty at any time without notice.


Questions, Assistance, and Services:
Your local hobby store and/or place of purchase cannot provide warranty support or service. Once assembly, setup or use of the Product has been started, you must contact your local distributor or Horizon directly. This will enable Horizon to better answer your questions and service you in the event that you may need any assistance. For questions or assistance, please
fill out our inquiry form, or call 877.504.0233 toll free to speak to a Product Support representative. You may also find information on our website at  

Inspection or Services:
If this Product needs to be inspected or serviced, please use the Horizon Online Service Request submission process found on our website or call Horizon to obtain a Return Merchandise Authorization (RMA) number. Pack the Product securely using a shipping carton. Please note that original boxes may be included, but are not designed to withstand the rigors of shipping without additional protection. Ship via a carrier that provides tracking and insurance for lost or damaged parcels, as Horizon is not responsible for merchandise until it arrives and is accepted at our facility. An Online Service Request is available at under the Support tab. If you do not have internet access, please contact Horizon Product Support to obtain a RMA number along with instructions for submitting your product for service. When calling Horizon, you will be asked to provide your complete name, street address, email address and phone number where you can be reached during business hours. When sending product into Horizon, please include your RMA number, a list of the included items, and a brief summary of the problem. A copy of your original sales receipt must be included for warranty consideration. Be sure your name, address, and RMA number are clearly written on the outside of the shipping carton.

NOTICE: Do not ship LiPo batteries to Horizon. If you have any issue with a LiPo battery, please contact the appropriate Horizon Product Support office.

Warranty Requirements:
For Warranty consideration, you must include your original sales receipt verifying the proof-of-purchase date. Provided warranty conditions have been met, your Product will be serviced or replaced free of charge. Service or replacement decisions are at the sole discretion of Horizon.

Non-Warranty Service:
Should your service not be covered by warranty service will be completed and payment will be required without notification or estimate of the expense unless the expense exceeds 50% of the retail purchase cost. By submitting the item for service you are agreeing to payment of the service without notification. Service estimates are available upon request. You must include this request with your item submitted for service. Non-warranty service estimates will be billed a minimum of ½ hour of labor. In addition you will be billed for return freight. Horizon accepts money orders and cashiers checks, as well as Visa, MasterCard, American Express, and Discover cards. By submitting any item to Horizon for service, you are agreeing to Horizon’s Terms and Conditions found on our website

United States:
Electronics and engines requiring inspection or repair should be shipped to the following address:

Horizon Service Center
4105 Fieldstone Road
Champaign, Illinois 61822

All other Products requiring warranty inspection or repair should be shipped to the following address:

Horizon Product Support
2904 Research Road
Champaign, Illinois 61822

Please call 877-504-0233 or fill out our inquiry form with any questions or concerns regarding this product or warranty.

Product Support

Technical questions about this JR product should be directed to JR AMERICAS Support Department:

Horizon Hobby, LLC no longer provides service for JR products. For service needs please contact JR AMERICAS at 217-352-7959 or by email at

Sales Support

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

4105 Fieldstone Road
Champaign, IL 61822
Email: Sales Phone:(800) 338-4639
Fax:(217) 355-1552

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