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Failsae

Failsae positions are also set during binding. In the unlikely event that the radio link is lost during use,

the receiver will drive the servos to their preprogrammed ailsae positions (normally ull brakes and

straight steering). I the receiver is turned on prior to turning on the transmitter, the receiver will enter

ailsae mode, driving the servos to their preset ailsae positions. When the transmitter is turned on,

normal control is resumed.

Tips on Using Spektrum 2.4GHz

Your DSM equipped 2.4GHz system is intuitive to operate, unctioning nearly identically to FMsystems. Following are a ew common questions rom customers.

1. Q: Which do I turn on frst, the transmitter or the receiver? A: It doesnt matter, i the receiver is turned on rst, all channels will be driven to the ailsae

position set during binding. When the transmitter is then turned on, the transmitter scans the

2.4GHz band and acquires an open channel. Then the receiver that was previously boundto the transmitter scans the band and nds the GUID (Globally Unique Identier code) stored

during binding. The system then connects and operates normally. I the transmitter is turned on

rst, the transmitter scans the 2.4GHz band and acquires an open channel. When the receiver

is turned on, the receiver scans the 2.4GHz band looking or the previously stored GUID. When

it locates the specic GUID code and conrms uncorrupted repeatable packet inormation, the

system connects and normal operation takes place. Typically this takes 2 to 6 seconds.

2. Q: Sometimes the system takes longer to connect and sometimes it doesnt connectat all. Why?

A: In order or the system to connect (ater the receiver is bound) the receiver must receive a largenumber o consecutive uninterrupted perect packets rom the transmitter. This process ispurposely critical o the environment ensuring that its sae to use when the system does connect.I the transmitter is too close to the receiver (less than 4 t) or i the transmitter is located nearmetal objects (metal Tx case, the bed o a truck, the top o a metal work bench, etc.), connectionwill take longer and in some cases connection will not occur as the system is receiving reected2.4GHz energy rom itsel and is interpreting this as unriendly noise. Moving the system awayrom metal objects or moving the transmitter away rom the receiver and powering the systemagain will cause a connection to occur. This only happens during the initial connection. Onceconnected the system is locked in and should a loss o signal occur (ailsae) the system

connects immediately (4ms) when signal is regained.

3. Q: Ive heard that the DSM system is less tolerant o low voltage. Is this correct?A: The SR300 has an operational voltage range o 3.5 to 9.6 volts. With most systems this is not

a problem as in act most servos cease to operate at around 3.8 volts. When using multiplehigh-current draw servos with an inadequate battery/power source, heavy momentary loads cancause the voltage to dip below this 3.5-volt threshold thus causing the entire system (servos andreceiver) to brown out. When the voltage drops below the low voltage threshold (3.5 volts), thereceiver must reboot.

4. Q: Sometimes my receiver loses its bind and wont connect, requiring rebinding.What happens i the bind is lost during use?

A: The receiver will never lose its bind unless its instructed to. Its important to understand thatduring the binding process the receiver not only learns the GUID (code) o the transmitter but

the transmitter learns and stores the type o receiver that its bound to.

I the system ails to connect, more than likely the transmitter is near conductive material

(transmitter case, truck bed, etc.) and the refected 2.4GHz energy is preventing the system

rom connecting. (See #2 above)

SR300 Instruction ManualSpektrums SR300 3-channel DSM Sport Surace receiver is compatible with all Spektrum surace

transmitters and operates in DSM mode.

Specifcations

Type: DSM

Channels: 3

Band: 2.4GHz

Dimensions (LxWxH): 1.60 x 1.06 x .58 in (41 x 27 x 15mm)

Weight: .3 oz (9 g)

Voltage Range: 3.59.6V

Binding Receiver to Transmitter

In order to operate, the receiver must be bound to the transmitter. Binding is the process o teachingthe receiver the specic transmitters code called GUID (Globally Unique Identier). When a receiver is

bound to a transmitter/model memory, the receiver will only respond to that specic transmitter/model

memory.

Binding

Note: The SR300 receiver utilizes the DSM protocol.

1. With the receiver o, insert the bind plug into the BIND port in the receiver.

2. Power the receiver through any port. I an ESC is being used, power on the ESC with the ESC leadplugged in the throttle channel port. The green LED will fash continuously indicating that the receiver

is in bind mode.

3. With the steering wheel, throttle trigger and Aux channel (i applicable) in the desired preset ailsae

positions, initiate the bind process with your Spektrum transmitter which will also store the ailsae

positions. Please see the next section or more inormation about Failsae.

4. The LED on the receiver should now be solid, indicating a successul bind has taken place.

5. Once the bind process is complete and beore power is cycled on the receiver, remove the bind plugand store it in a convenient place. Failure to remove the bind plug will result in the receiver going

back into bind mode.

Note:The only time it is necessary to do a rebind is i dierent ailsae positions are desired e.g., servo travel

has been reversed ater the initial bind, or i the receiver is to be bound to a dierent model memory.

Powering thereceiver with aseparatereceiver pack Powering the

receiver with an ESC

Bind Plug

Declaration o Conormity(in accordance with ISO/IEC 17050-1)

No. HH2008111002

Product(s): SR300 ReceiverItem Number(s): SPMSR300

Equipment class: 1

The object o declaration described above is in conormity with the requirements o specifcations listed below, ollowing the provisions o the European R&TTE directiv

EN 301 489-1, 301 489-17 General EMC requirements or Radio equip

Signed or and on behal o:Horizon Hobby, Inc.Champaign, IL USANov. 10, 2008

Steven A. HallVice PresidentInternational Operations and Risk ManagementHorizon Hobby, Inc.

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