Horizon Hobby Spektrum AR9010 Mode D'emploi page 14

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band looking for the previously stored GUID. 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 that 4 ft.) 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 the
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
startup 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."
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