Spektrum AR6255 Guide De L'utilisateur page 10

receiver scans the 2.4GHz band looking for the previously stored GUID. When it
locates the specific GUID code, it confirms the uncorrupted repeatable packet
information, 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 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. 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 when the signal is regained.
3. 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
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.
4. 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."
EN