Spektrum SPMR55201 DX5e - Manual (Page 12)

12 SPEKTRUM DX5e • RADIO USER’S GUIDE
EN
DE
FR
IT
FRANCE RF SETTING
TO SET FRANCE MODE:
Hold the trainer switch and push and hold the Aileron
trim button to the left. Turn on the transmitter. A series of
descending tones should be heard. Release switches.
TO SET STANDARD MODE:
Hold the trainer switch and push and hold the Aileron trim
button to the right. Turn on the transmitter. A series of
ascending tones should be heard. Release switches.
RECEIVER POWER SYSTEM
REQUIREMENTS
With all radio installations, it is vital the onboard power
system provides adequate power without interruption to the
receiver even when the system is fully loaded (servos at
maximum flight loads). This becomes especially critical with
giant-scale models that utilize multiple high-torque/ high-
current servos. Inadequate power systems that are unable
to provide the necessary minimum voltage to the receiver
during flight loads have become the number-one cause of
in-flight failures. Some of the power system components
that affect the ability to properly deliver adequate power
include: the selected receiver battery pack (number of cells,
capacity, cell type, state of charge), switch harness, battery
leads, regulator (if used) and, unless it’s a regulator, power
bus (if used).
While a Spektrum receiver’s minimum operational voltage
is 3.5 volts, it is highly recommended the system be tested
per the guidelines below to a minimum acceptable voltage of
4.8 volts during ground testing. This will provide head room
to compensate for battery discharging or if the actual flight
loads are greater than the ground test loads.
RECOMMENDED POWER SYSTEM
GUIDELINES
1. When setting up large or complex aircraft with multiple
high-torque servos, it’s highly recommended that a
current and voltmeter (Hangar 9 HAN172) be used. Plug
the voltmeter in an open channel port in the receiver
and, with the system on, load the control surfaces
(apply pressure with your hand) while monitoring the
voltage at the receiver. The voltage should remain above
4.8 volts even when all servos are heavily loaded.
2. With the current meter in line with the receiver battery
lead, load the control surfaces (apply pressure
with your hand) while monitoring the current. The
maximum continuous recommended current for a
single heavy-duty servo/battery lead is three amps
while short-duration current spikes of up to five amps
are acceptable. Consequently, if your system draws
more than three amps continuous or five amps for short
durations, a single battery pack with a single switch
harness plugged into the receiver for power will be
inadequate. It will be necessary to use multiple packs
with multiple switches and multiple leads plugged into
the receiver.