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SPEKTRUM DX8G2 • TRANSMITTER INSTRUCTION MANUAL
EN
RECEIVER POWER SYSTEM REqUIREMENTS
Inadequate power systems that do not provide the necessary
minimum voltage to the receiver during flight 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:
• Receiver battery pack
(number of cells, capacity, cell type, state of charge)
• The ESC’s capability to deliver current to the receiver in electric
aircraft
• The switch harness, battery leads, servo leads, regulators etc.
The AR8000 has a minimum operational voltage of 3.5 volts;
it is highly recommended the power system be tested per the
guidelines below.
Recommended Power System Test Guidelines
If you are using a questionable power system, (e.g. a small or old
battery, an ESC that may not have a BEC that will support high-
current draw, etc.), perform the following test with a voltmeter.
The Hangar 9
®
Digital Servo & Rx Current Meter (HAN172) or the
Spektrum Flight Log (SPM9540) work well for this test.
Connect the voltmeter to 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.
CAUTION:
When charging Ni-MH batteries, make sure
the battery fully charges. Ni-MH batteries charged with
peak detection fast chargers have a tendency to false peak
(i.e. not fully charge), which could lead to a crash.
quickConnect™ Technology with Brownout Detection (DSM2 Only)
Your AR8000 features QuickConnect technology with Brownout
Detection.
• Should an interruption of power occur (brownout), the system
will reconnect immediately when power is restored.
• The LED on the receiver will flash slowly, indicating a power
interruption (brownout) has occurred.
• Brownouts can be caused by an inadequate power supply (weak
battery or regulator), a loose connector, bad switch, inadequate
BEC when using an electronic speed controller, etc.
• Brownouts occur when the receiver voltage drops below 3.5
volts. This interrupts control, as the servos and receiver require
a minimum of 3.5 volts to operate.
How quickConnect Technology with Brownout Detection Works
• When the receiver voltage drops below 3.5 volts, the system
drops out (ceases to operate).
• When power is restored, the receiver immediately attempts to
reconnect to the last two frequencies it was connected to.
• If the two frequencies are present (the transmitter was left on),
the system reconnects typically in about 4/100 of a second.
QuickConnect with Brownout Detection is designed to allow you
to fly safely through most short duration power interruptions.
However, you must correct the cause of these interruptions before
your next flight to prevent a crash.
CAUTION:
If a brownout occurs in flight, determine the
cause of the brownout and correct it before attempting
to fly again.
EU versions of the DX8 are not compatible with DSM2
®
receivers.
Make sure all receivers are DSMX
®
compatible.
European Union Receiver Requirements
