Receiver Power System Requirements; Recommended Power System Test Guidelines; European Union Receiver Requirements; Quickconnect ™ Technology With Brownout Detection - Spektrum DX8e Instruction Manual

EN

RECEIVER POWER SYSTEM REQUIREMENTS

Inadequate power systems that do not provide the necessary
minimum voltage to the receiver during fl ight have become the
number one cause of in-fl ight 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.

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 and Receiver 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.

European Union Receiver Requirements

EU versions of the DX8e are not compatible with DSM2
Make sure all receivers are DSMX
QuickConnect™ Technology with Brownout Detection (DSM2 Only)
The AR8010T 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 fl ash slowly, indicating a power
interruption (brownout) has occurred.

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.
12
® receivers.
®
compatible.
The AR8010T has a minimum operational voltage of 3.5 volts; test
the power system per the guidelines below.
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.
• 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.
QuickConnect with Brownout Detection is designed to allow you
to fl y safely through most short duration power interruptions.
However, you must correct the cause of these interruptions before
your next fl ight to prevent a crash.
CAUTION: If a brownout occurs in fl ight, determine the
cause of the brownout and correct it before attempting
to fl y again.
SPEKTRUM DX8e • TRANSMITTER INSTRUCTION MANUAL