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Tips on using spektrum 2.4ghz, Warranty period, Limited warranty – Spektrum SPMAR7600 User Manual

Page 3: Damage limits, Safety precautions, Questions, assistance, and repairs, Inspection or repairs

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Tips on Using Spektrum 2.4GHz

While your DSM equipped 2.4GHz system is intuitive to operate, functioning nearly identically to

72MHz systems, following are a few common questions from customers.

Q: Which do I turn on first, the transmitter or the receiver?

A: If the receiver is turned off first—all servos except for the throttle will be driven to their

preset failsafe positions set during binding. At this time the throttle channel doesn’t output a

pulse position preventing the arming of electronic speed controllers or in the case of an engine

powered aircraft the throttle servo remaining in its current position. When the transmitter is

then turned on the transmitter scans the 2.4GHz band and acquires two open channels. Then

the receiver that was previously bound to the transmitter scans the band and finds the GUID

(Globally Unique Identifier code) stored during binding. The system then connects and operates

normally.

If the transmitter is turned on first—the transmitter scans the 2.4GHz band and acquires two

open channels. When the receiver is then turned on for a short period (the time it takes to

connect) all servos except for the throttle are driven to their preset failsafe positions while the

throttle has no output pulse. The receiver scans the 2.4GHz band looking for the previously

stored GUID and when it locates the specific GUID code and confirms uncorrupted repeatable

packet information, the system connects and normal operation takes place. Typically this takes

2 to 6 seconds.

Q: Sometimes the system takes longer to connect and sometimes it doesn’t connect

at all?

A: In order for the system to connect (after the receiver is bound) the receiver must receive

a large number of consecutive uninterrupted perfect packets from the transmitter in order to

connect. This process is purposely critical of the environment ensuring that it’s safe to fly when

the system does connect. If the transmitter is too close to the receiver (less than 4 feet) or if the

transmitter is located near metal objects (metal TX case, the bed of a truck, the top of a metal

work bench, etc.) connection will take longer and in some cases connection will not occur as

the system is receiving reflected 2.4GHz energy from itself and is interpreting this as unfriendly

noise. Moving the system away from metal objects or moving the transmitter away from the

receiver and powering the system again will cause a connection to occur. This only happens

during the initial connection. Once connected the system is locked in and should a loss of signal

occur (failsafe) the system connects immediately (4ms) when signal is regained.

Q: I’ve heard that the DSM system is less tolerant of low voltage. Is this correct?

A: All DSM receivers have an operational voltage range of 3.5 to 9.6 volts. With most systems

this is not a problem as in fact most servos cease to operate at around 3.8 volts. When using

multiple high-current draw servos with a single or inadequate battery/power source, heavy

momentary loads can cause the voltage to dip below this 3.5-volt threshold thus causing the

entire system (servos and receiver) to brown out. When the voltage drops below the low voltage

threshold (3.5 volts), the DSM receiver must reboot (go through the start-up process of scanning

the band and finding the transmitter) and this can take several seconds. Please read the receiver

power requirement section as this explains how to test for and prevent this occurrence.

Q: Sometimes my receiver loses its bind and won’t connect requiring rebinding. What

happens if the bind is lost in flight?

A: The receiver will never lose its bind unless it’s instructed to. It’s important to understand that

during the binding process the receiver not only learns the GUID (code) of the transmitter but the

transmitter learns and stores the type of receiver that it’s bound to. If the transmitter is placed

into bind mode, the transmitter looks for the binding protocol signal from a receiver. If no signal

is present, the transmitter no longer has the correct information to connect to a specific

receiver and in essence the transmitter has been “unbound” from the receiver. We’ve had

several DX7 customers that use transmitter stands or trays that unknowingly depress the

bind button and the system is then turned on losing the necessary information to allow the

connection to take place. We’ve also had DX7 customers that didn’t fully understand the range

test process and pushed the bind button before turning on the transmitter also causing the

system to “lose its bind.”

Warranty Period

Exclusive Warranty- Horizon Hobby, Inc., (Horizon) warranties that the Products purchased (the “Product”)

will be free from defects in materials and workmanship for a period of 1 year from the date of purchase by

the Purchaser.

Limited Warranty

(a) This warranty is limited to the original Purchaser (“Purchaser”) and is not transferable. REPAIR

OR REPLACEMENT AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE

PURCHASER. This warranty covers only those Products purchased from an authorized Horizon dealer.

Third party transactions are not covered by this warranty. Proof of purchase is required for warranty claims.

Further, Horizon reserves the right to change or modify this warranty without notice and disclaims all other

warranties, express or implied.
(b) Limitations- HORIZON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED,

ABOUT NON-INFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE

PRODUCT. THE PURCHASER ACKNOWLEDGES THAT THEY ALONE HAVE DETERMINED THAT THE

PRODUCT WILL SUITABLY MEET THE REQUIREMENTS OF THE PURCHASER’S INTENDED USE.
(c) Purchaser Remedy- Horizon’s sole obligation hereunder shall be that Horizon will, at its option, (i)

repair or (ii) replace, any Product determined by Horizon to be defective. In the event of a defect, these are

the Purchaser’s exclusive remedies. Horizon reserves the right to inspect any and all equipment involved

in a warranty claim. Repair or replacement decisions are at the sole discretion of Horizon. This warranty

does not cover cosmetic damage or damage due to acts of God, accident, misuse, abuse, negligence,

commercial use, or modification of or to any part of the Product. This warranty does not cover damage due

to improper installation, operation, maintenance, or attempted repair by anyone other than Horizon. Return

of any goods by Purchaser must be approved in writing by Horizon before shipment.

Damage Limits

HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOSS OF

PROFITS OR PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCT,

WHETHER SUCH CLAIM IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT LIABILITY.

Further, in no event shall the liability of Horizon exceed the individual price of the Product on which liability

is asserted. As Horizon has no control over use, setup, final assembly, modification or misuse, no liability

shall be assumed nor accepted for any resulting damage or injury. By the act of use, setup or assembly, the

user accepts all resulting liability.
If you as the Purchaser or user are not prepared to accept the liability associated with the use of this

Product, you are advised to return this Product immediately in new and unused condition to the place of

purchase.
Law: These Terms are governed by Illinois law (without regard to conflict of law principals).

Safety Precautions

This is a sophisticated hobby Product and not a toy. It must be operated with caution and common sense

and requires some basic mechanical ability. Failure to operate this Product in a safe and responsible

manner could result in injury or damage to the Product or other property. This Product is not intended

for use by children without direct adult supervision. The Product manual contains instructions for safety,

operation and maintenance. It is essential to read and follow all the instructions and warnings in the

manual, prior to assembly, setup or use, in order to operate correctly and avoid damage or injury.

Questions, Assistance, and Repairs

Your local hobby store and/or place of purchase cannot provide warranty support or repair. Once assembly,

setup or use of the Product has been started, you must contact Horizon directly. This will enable Horizon to

better answer your questions and service you in the event that you may need any assistance. For questions

or assistance, please direct your email to [email protected], or call 877.504.0233 toll

free to speak to a Product Support representative.

Inspection or Repairs

If this Product needs to be inspected or repaired, please call for a Return Merchandise Authorization (RMA).

Pack the Product securely using a shipping carton. Please note that original boxes may be included, but

are not designed to withstand the rigors of shipping without additional protection. Ship via a carrier that

provides tracking and insurance for lost or damaged parcels, as Horizon is not responsible for merchandise

until it arrives and is accepted at our facility. A Service Repair Request is available at www.horizonhobby.

com on the “Support” tab. If you do not have internet access, please include a letter with your complete

name, street address, email address and phone number where you can be reached during business days,

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