Spektrum SPM18000 DX18QQ User Manual download pdf (Page 60)

SPEKTRUM DX18QQ

Preset Failsafe:

• Prevents unintentional electric motor response on start-up.

• Drives all servos, except for the throttle to their preset failsafe positions, if the

receiver only is powered and no signal is present.

• Establishes preset failsafe servo positions for all channels if the signal is lost.

Programming SmartSafe

During the binding process, the bind plug is left in throughout the process and is

removed only after the receiver connects to the transmitter. After the connection

is made (conﬁ rmed by operating the servos), the bind plug can be removed. The

receiver is now programmed for SmartSafe.

Programming Preset Failsafe

During the binding process, the bind plug is inserted in the bind port, then the

receiver is powered up. The LEDs in each receiver should blink, indicating that

the receiver is in bind mode. Before binding the receiver to the transmitter with

the receiver in bind mode, remove the bind plug. The LEDs will continue to blink.

With the control sticks and switches in the desired failsafe positions, bind the

transmitter to the receiver by putting the transmitter into bind mode. The system

should connect in less than 15 seconds. The receiver is now programmed for

preset failsafe.

Failsafe positions are stored via the stick and switch positions on the transmitter

during binding.

QuickConnect

™

with Brownout Detection

The remote receivers now included with the AR12120 feature QuickConnect with

Brownout Detection (Brownout Detection is not available with DSMX technology).

Should a power interruption occur (brownout), the system will reconnect immedi-

ately when power is restored and the LEDs on each connected receiver will ﬂ ash,

indicating a brownout (power interruption) has occurred (DSM2 only). Brownouts

can be caused by an inadequate power supply (weak battery or regulator), a loose

connector, a bad switch, an inadequate BEC when using an electronic speed

controller, etc. Brownouts occur when the receiver voltage drops below 3.2 volts

thus interrupting control as the servos and receiver require a minimum of 3.2

volts to operate.

How Brownout Detection Works

When the receiver voltage drops below 3.2 volts the system drops out (ceases to

operate). When power is restored, the receivers will immediately attempt to recon-

nect to the last two frequencies they were connected to. If the two frequencies

are present (the transmitter was left on) the system reconnects, typically in about

4ms. The receivers will then blink, indicating a brownout has occurred (DSM2

only). If at any time the receiver is turned off then back on and the transmitter is

not turned off, the receivers will blink, as a power interruption was induced by

turning off the power to the receiver (DSM2 only). In fact this simple test (turning

the receiver off then on) will allow you to determine if your system’s brownout

detection is functioning (DSM2 only).

If a brownout occurs in-ﬂ ight, it is vital that the cause of the brownout be de-

termined and corrected. QuickConnect and Brownout Detection are designed to

allow you to safely ﬂ y through most short duration power interruptions. However,

the root cause of these interruptions must be corrected before the next ﬂ ight to

prevent catastrophic safety issues.

Storing Your System

If the system will be stored for more than two weeks, it’s important that the bat-

tery be disconnected from the PowerSafe receiver or from the regulator (if used).

The receiver draws a small amount of current (less than 1mA) even when the

switch is turned off. This causes the battery to drain and could result in damage

to the battery if left attached for an extended period. This is especially important

when using LiPo batteries as irreversible damage could occur.

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Spektrum SPM18000 DX18QQ User Manual Page 60

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