The X9503 2.4 contains a 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 is to be the Master or Slave. The Trainer (TRN) 
switch transfers control to the student when the X9503 2.4 
is being used as the Master/Instructor transmitter. All Dual 
rates and Exponential settings in the Master transmitter 
are transferred to the Slave transmitter when the master 
transmitter channels are selected individually in the trainer 
menu. 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 transmitter remains powered off 
and can even have the module removed.
2. Make sure the Slave transmitter is in the PPM/FM 
modulation mode. If the slave system is a X9503 2.4 or 
any other Spread Spectrum system, such as other JR 
2.4GHz or Spektrum systems, this does not apply.
3. Highlight and select Trainer in the FUNCTION LIST 
to obtain the Trainer Display.
4. If using the X9503 2.4 as the Master transmitter, select 
the channel(s) the Slave transmitter will operate when 
in trainer mode. 
X9503 2.4 USED AS MASTER (INSTRUCTOR) – (Trainer System)
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. 
When all channel selectors are in the MAST position, 
the slave system must be programmed for the model, 
meaning all programming necessary for the model must 
be programmed in both the master and the slave systems. 
Also when all the channel selectors are in the MAST 
position, the slave system should be left in normal default 
MASTER mode. To transfer only certain channels to the 
student, highlight and select the channels that you will 
transfer, 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. 
When the channel selectors are in the SLAV position, all 
programming of the master system will be used, and only 
the stick movements of the 4 primary channels are used 
from the slave system when control is given to the slave 
transmitter. In this case, the slave system does not need 
to be programmed for the model. Also the slave system 
should be set to Slave mode in its trainer system. The 
X9503 2.4 is now ready to be  the Master or instructor 
transmitter. Depress the trainer switch to transfer control 
to the student. Control will remain transferred until the 
trainer switch is released.
X9503 2.4 USED AS SLAVE (STUDENT) – (Trainer System)
Highlight and select MASTER and the display switches 
to SLAVE. A message appears instructing to Connect 
DSC & POWER off. Make sure the transmitter power 
switch is in the OFF position and the trainer cord is 
connected between the 2 transmitters. If the master 
system is an XP9303, X9303 2.4, X9503 2.4, or 12X and 
the individual channels are not selected in the master 
system’s trainer function, leave the slave system’s trainer 
function in the default MASTER setting. In this case, 
both the master and the slave systems must be fully 
programmed and set up to fly the model including all 
servo reversing, travel adjust, program mixes and all other 
necessary programming.
You can now use the X9503 as the Slave transmitter.