Spektrum SPMAR6400 - Manual (Page 11)

EN
Tips on Using Spektrum 2.4GHz
ModelMatch ™
Some Spektrum and JR transmitters offer a patent pending feature called ModelMatch.
ModelMatch prevents the possibility of operating a model using the wrong model memory,
potentially preventing a crash. With ModelMatch each model memory has its own unique code
(GUID) and during the binding process the code is programmed into the receiver. Later, when the
system is turned on, the receiver will only connect to the transmitter if the corresponding model
memory is programmed on screen.
Note: If at any time you turn on the system and it fails to connect, check to be sure the correct
model memory is selected in the transmitter. Please note that the DX5e and Aircraft Modules do
not have ModelMatch.
Failsafe
Your AR6400/AR6400L features failsafe programming. Failsafe prevents accidental motor
operation before the system connects and, in the unlikely event of signal loss, Failsafe drives the
throttle to a preset (off) position and all other servos to their neutral positions.
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.
1. 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 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.
2. 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.”