JR X9303 2.4

RADIOREVIEW JR X9303 2.4
The main screen on the X9303 2.4 is very easy to read. Navigation and adjustment of the radio’s various
menus is made easy with the unique roller selector switch to the right of the screen.
• Flap system (3-position with elevator compensation
and delay)
• Snap-roll system (with 4 directions
and rates)
• Gyro system (3 gains for up to 2 gyros)
• Servo-speed adjustment (in both directions)
• Programmable mixers (6 total; 2 with
multipoint adjustment)
• Direct servo control (DSC)
MAIN DISPLAY
There’s very little confusion while navigating
the transmitter’s many program menus. The
main display shows the current model type
(with a graphic symbol) the trim positions,
the battery voltage, the model number and
the model’s name if you input that information.
The function screen is where you find
menus for dual rates/expo, servo-reversing,
subtrim, servo-travel adjustment, elevator-toflap
and aileron-to-rudder mixing, throttle
curves, flap system, servo speed, snap roll,
servo-speed adjustment and programmable
mixers 1 through 6. You also find the trainer,
timer and servo monitor menus.
In the system menus (press the enter button
and turn on the radio), you find the model
select, model name, type select, model memory
reset, data transfer, trim step function, device
(switch) selection and wing-type menus.
The navigation and adjustment of these program
functions is well detailed in my XP9303
review, and the process is easy and intuitive.
MODELMATCH
This feature puts an end to the “wrong model
94 MODELAIRPLANENEWS.COM
syndrome” if you neglect to double-check that
you have the correct model name on the transmitter
display before you fly your model. A
unique code embedded in the signal, will prevent
the receiver from responding if the wrong
model’s name is on the transmitter’s screen.
SERVOSYNC
This new feature actually re-sequences data
the transmitter transmits based on the type of
mixing you select. So, if you use dual elevators
on a giant model or a 3-servo CCPM setup for
X9303 2.4 FEATURES
The X9303 2.4 has aircraft, sailplane
and helicopter software menus.
Here are the basic aircraft program
features:
■ Switch assignment
■ Flight modes (3 aircraft, 5 sailplane, 6
helicopter)
■ Dual rates for aileron, rudder and
elevator (3 with flight modes)
■ Adjustable flight trims
■ Fail-safe (with hold and predetermined
servo positioning)
■ Trainer system (selectable channels)
■ Timers (stopwatch, countdown and
integrated)
■ Servo monitor
■ ModelMatch
■ ServoSync
■ Model memory transfer system
■ Model copy system
your helicopter, ServoSync ensures that the
servos that work together will receive their
impulses together. This allows the servo
movements to be more synchronized for
improved response.
RECEIVER
The JR R921 2.4 is a full-range receiver featuring
DuaLink technology and is actually two
receivers that each has its own set of antennas.
When powered up, the receiver scans the
2.4GHz band to find the transmitter it has been
programmed to recognize, and it locks on to its
signal. The second receiver circuit then repeats
the process and locks on to a second signal to
establish a dual-signal link to the transmitter.
The two antennas virtually eliminate
blocked-signal interference from nearby metal
objects such as big glow- and gas-powered
models and large battery packs. As with all
2.4GHz radio systems, the transmitter signal
beam is line-of-sight, so always avoid flying
behind large buildings or objects that could
block the signal.
Binding. Binding programs the receiver to recognize
your transmitter, and it’s done at the
factory. Binding or rebinding is necessary if
you purchase another receiver to use with
your transmitter and if you want to change
the built-in throttle-smart fail-safe settings.
Smart fail-safe. This built-in feature is set so that
if there is a signal loss, the throttle will go to a
low setting, and the other control channels will
remain in their last positions. If you turn on the
receiver before the transmitter, all the channels
go to their fail-safe positions (set during the
binding process), but as a safety feature, the
throttle channel does not produce a signal
pulse, so it can’t activate an electric model’s
ESC. The instruction manual explains the
binding and fail-safe setting processes in detail.
BOTTOM LINE
The JR X9303 2.4 is a user-friendly radio system
that’s ideally suited to intermediate to
expert fliers. I especially like the fact that with
its transfer system, you can easily bring all
your XP9303 model memories into the X9303
2.4. This is a real time saver. Add the
frequency freedom of DSM 2.4GHz frequency
modulation and the ability to link to all older
Spektrum receivers, and you have a radio
system that’s ideal types of RC flying.
See the Source Guide for manufacturers’ contact information.