Receiver Power System Requirements - Spektrum AR8010T User Manual

Receiver Power System Requirements

Inadequate power systems that are unable to 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.
The AR8010T/AR9030T/AR9320T have 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 a questionable power system is being used (e.g. small or old battery,
ESC that may not have a BEC that will support high-current draw, etc.), it is
recommended that a voltmeter be used to perform the following tests.
®
The Hangar 9 Digital Servo & Rx Current Meter (HAN172) or the Spektrum
Flight Log (SPM9540) is the perfect tool to perform the test below.
Plug the voltmeter into an open channel port in the receiver and with the
system on, or simply monitor the voltage on a telemetry capable transmitter,
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.
How QuickConnect
• When the receiver voltage drops below 3.5 volts the system ceases to operate.
• When power is restored the receiver immediately attempts to reconnect.
• If the transmitter was left on, the system reconnects typically in about
4/100 of a second.
NOTICE: If a brownout occurs in fl ight it is vital that the cause of the
brownout be determined and corrected.
IMPORTANT: When using Y-harness or servo extensions with Spektrum
equipment, do not use reversing harnesses. Using reversing Y-harnesses or
servo extensions may cause servos to operate erratically or not function at all.
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